Weak knowledge of building control

Friday, January 20, 2012

【 Weak current College 】 self-priming class installation and notes---Power By 【 China power house network 】

1. first check everywhere there are no loose bolts, power cables and plugs are intact, the electrical insulation resistance should be greater than 2 megabytes of Europe.

2. in order to prevent electric shock, you must install leakage power tap or shock protector and other appropriate security measures, and to carry out reliable earthing

3. pump operating voltage range of use shall be at the rated voltage of + 5%-12% of the room, this will make motor service life is reduced or burned. Electric pump such as the use of land from the power supply, power transmission lines should be bold, otherwise it will use the voltage drop and cannot run.

4. close the power switch, the pump idling 2 minutes viewing startup, operation is normal, the steering is correct.

5. fixed the pump body, pipe or rubber tubes (not too soft, so as not to draw flat), the connection of the intake and bottom valve, foot valve placement must be perpendicular to the horizontal plane, leaving more than underwater, so as to avoid 30Cm suction on the sediment.

6. water use and automatic suction centrifugal pumps for the first time before the tank filled with water, the power of tens of seconds after non-automatic water, later use it without irrigation.

7. Since the Jiqing pump and automatic self-priming pumps tube before first use, the water storage tank filled with water, within the power of tens of seconds after non-automatic water, later use it without irrigation.

8. use the motor should be kept dry, water conditions, bottom valve does not re-appear. When the temperature is below 4 C 2000. The work should be done to prevent Frost crack anti-freeze pump body.

9. If a period of time not to be drained net pump water (self-priming pump and automatic pump out the water tank), wipe the main part, painted with antirust oil, placed in the alternate vent dry place.

Thursday, January 19, 2012

【 Weak current College 】 elevator maintenance plan (2)---Power By 【 China power house network 】

Elevator parts repair, check and adjust the requirements

Traction speed reducers:

1. the tractor worm reducer to run should be smooth and no vibration, worm-gear and worm spiral of meshing should be kept well and ensure reversibility of work without.

2. the gearbox oil pool must have adequate and appropriate oil thickness (gear oil). Oil plane shall be maintained in worm tooth root line (that is, a worm and worm gear tooth surface following).

3. the gearbox cover peephole door and bearing cap and body connection should close, not leaking oil. The worm shaft out side with rubber seal, here allows generate a small amount of lubrication oil leakage.

4. reducer oil should be kept clean, escaping from the shaft seal at the lubricant must be small box Sheng received, after then you can use the filter.

5. the traction machine base of bolts should be secured without loosening phenomenon.

6. reducer in normal conditions of operation, its parts and bearing temperature should not exceed 80 degrees centigrade.

7. when the reducer in normal operation, such as bearings have high temperatures above 80 ° c or have significant non-uniform noise or even a mill-cut and impact sound, the bearing should be reversed.

8. check the reducer worm and worm gear and bearing condition, like must be disassembled shall firstly be reducer cabin at the top of the other well road with inverted chain hoists, and will focus on pit with wooden brace for a minute. Then drain the reducer in lubricants, wash with kerosene.

9. when using a year long speed reducers, gear wear increases and when the backlash between teeth than a mm above and in the work produced in the impact of manganese Margaret should consider swapping the worm wheel and worm.

Brakes:

1. the brake must be flexible and reliable. Brake should be closely tailored to the brake wheel work surface, when pine gate time brake should leave the brake wheel work surface shall have a local conflicts, at this point in the brake wheel and brake shoe evenly gap between formation must be no greater than 0.5 mm.

2. DC electromagnetic brakes pine gate is disconnected by SSBZ switch contacts will be economic resistor string into the solenoid loop so that the temperature rise reduces. Electromagnetic coil temperature rise shall not exceed 60 ° c.

3. brake with solenoid connector should not loose, coil external should have good insulation against short circuit.

4. brake PIN must be free to rotate and thin oil lubrication. Electromagnet of movable iron core in copper sleeve must be available when necessary by sliding the flexible graphite powder lubrication.

5. keep brake brake band work surface clean and should not be snuck into the rich or paint. Fixed braking belt rivet into the braking zone must not be in contact with the brake wheel, brake wheel rough.

6. when the brake shoe brake band gap increased wear, so that the brake is not working properly, and an exception occurs in impact sound you should adjust the movable iron core and brake arm between gap adjustment bolt, to compensate for wear off brake band makes their clearance recovery.

7. when the brake shoe brake band wear is too large, the rivet head is worn out or over a quarter of the braking zone thickness should be replaced in a timely manner.

8. adjust the brake coil springs should fit in full decline should be able to provide sufficient braking force the car quickly stopped and when loaded with increased braking is not to be too MN, two brake adjustment of the braking force shall be uniform.

Traction motor:

1. motor connection should remain strong, worm shaft and motor shaft connection of different shaft degree after tolerance:

Steel connections should be ≤ 0.04 mm

Flexible connection should be ≤ 0.20 mm

2. bearing temperature should not be higher than 80 degrees centigrade.

3.Since the bearing wear, the stator and rotor air gap between the circumference skewed and generate noise, then you should replace the bearings.

4. rolling application lithium base grease fill approximately bearing room 2/3 of the volume, 2500-3000 hours should be replaced with new grease.

Traction wheel:

1. the traction sheave of worktable surface should be smooth, due to traction rope tension deviation, causing the Groove wear is inconsistent, in the top of a traction rope diameter to traction wheel flange distance difference, such as more than 1.5 mm, an in-place heavy cart or replace traction wheel.

2. to avoid Dray and have serious traction wheel slip phenomena, the need to prevent the rope in the Groove at the end of the fall, when Dray and tank bottom gap ≤ 1 mm, Groove should be heavy cart or replace traction wheel. Heavy vehicle, you should be aware of the incision beneath the wheel flange thickness of not less than the diameter of the wire rope.

3. steering wheel for lubricating device should remain intact and be filled with calcium base grease, every two weeks should be crowded with time, such as lubrication failure, brushwood and the spindle pulley, will lead to serious accidents and damage.

Speed limiter and safety clamp:

1. the action Builder should be flexible and reliable, the rotating part of lubricating device should maintain good cheer each month. Annual cleaning and get a new one.

2. a speed limiter tensioning device should work correctly, the rope round and guiding device of lubrication should be kept well and once per month refueling, cleaning-once a year.

3. safety clamp movements the flexible and reliable, have sufficient strength to withstand the impact.

4. when the car is safety forceps in Rails, located on the cabin side of safety clamp device should occur at the same time, and on either side of the force uniform, the car should not be significantly skewed.

5. security of the transmission lever should be lubricated. JAWS tilted blocks or roller available calcium base grease antirust.

6. when safety clamp work, safety clamp chain contact should take effect immediately, will power control circuit, using the motor to stop functioning.

7. when the role of safety clamp, should beCheck and adjust the clearance and to amend the guide rail.

Traction wire rope:

1. lift the full traction tension of the wire rope should be balanced. If tension have imbalances available rope sleeve bolt nut to adjust the spring tight so that its average.

2. rope should have appropriate lubrication to reduce friction between the rope wire, while also protecting the loss of its surface does not cause corrosion, the steel wire ropes in the original oil-soaked hemp core a root, use oil gradually extravasation is not required in the surface coating of oil, such as the use of a long period of time, the gradual depletion of oil, will be scheduled on oil, oily to with thin, oil is not too much, so that the wire rope surface is able to penetrate the slight lubrication (touch sense with oil). But when the permeability oil too much oil removal should be conducted to prevent oil leakage caused by too much rope traction wheels are slipping.

3. check wire rope has no mechanical damage, wuduan silk explosive stock situation, the extent of the corrosion and wear, the connector is intact and there are no loose phenomenon.

4. check the traction cord if it is discovered that the following conditions should be replaced:

A. break in between each share in a uniform, screwed from the inside of the maximum number of broken lines; up to 32 root

B. break set in 1 or 2 rope, in a twist from the maximum number of broken wires more than 16 root;

C. Dray surface of steel have greater wear and corrosion;

D. Dray severe wear their diameter smaller than the original diameter 90%;

5. when traction rope when excessive elongation should be truncated.

Guides and guide boots:

Cabin and on track should be on every two weeks, the oil once on roller guide shoe Guide should not be on oil, should guide rail surface area regularly to eradicate, lubricating oil, hydraulic oil available.

Rails should support, not shaking vertical skew, all securing screws should not loose particles.

Guide rail oil as a result of fault causing surface rough or because of safety clamp and surface damage, you should try to finish before using.

Check the sliding guide boots in Rails taxiing the friction caused by the pads to wear, if excessive wear excesses clearance when the car in motion will produce sloshing phenomenon, the timely replacement shoe lining.

Check the Guide should guide shoes and safety clamp-must remain appropriate clearance so that import safety boots after a slight wear pincers MFT.

Limit switch or limit switch:

Limit switch's role should be flexible and reliable. When the car arrives at the upper and lower end station, should not take the role of the control device, automatic car stop, the lift stops should be can't start to the original direction, can only be run in the opposite direction.

Limit switch's role should be flexible and reliable. If the elevator because of the limit switch failure or other cause not within the upper and lower end station stop and continue in a timely manner, in beyond the floor by distance (about 200-300 mm), the limit switch should play a role, the safety circuit breaker to the elevator stops running.

Check limit switch and limit switches, you should wipe away dirt, will cover the opening to verify the reliability of the contactor contacts, elastic contact compression allowance, the contact surface of the scale and ablation with abrasive cloth to wipe clean place, turning and grinding parts available Vaseline lubrication.

Control box and call button:

The button onthe control box should always be sensitive, and when you press a certain layer of a button the appropriate signal lights that require light to reach the correct role whenever no external force block to be able to bounce.

The call button should function correctly when you press the flexibility under a layer of a button to call the corresponding signal lamp on lamp is lit, you reach the correct role whenever no external force block to be able to bounce.

Hall door, cabin door, door locks, and door pulley:

Hall door and cabin doors should be flat and upright, flexible, open and close, it should be portable with no beat, swing and noise, door pulley of rolling bearings and other friction parts should be timed lubrication.

Hall door lock should be flexible and reliable, when the door closes locked office should be can't be opened from the outside.

Check the door should clear the accumulated dirt. When the door is closed the verification activities of hook to the lock in meshing of reliability. Inspection door contacts in hook of contact reliability and allowance for contacts and conductors connection, clear the contact of the scale and ablation. Should definitely eliminate lock in and lock hook out of contact remain connected. Door lock rotation and friction parts should be adequate lubrication.

Hall door and car door of electrical contacts should be sensitive and reliable. Lift only in the door close contacts connected to start running. Whenever the Office door or car door open contact is disconnected, the elevator should be can't be switched on while in motion also should immediately stop automatically.

Wednesday, January 18, 2012

Weak current College】【IC card water control, electronic control system solutions.

Keywords: ic card-saving water control system-controlled water-saving controller Summary: IC card water control system to improve management level, IC card can save water control system for schools economizing, save costs, IC card water .control system enables a wide range of social benefits. More than ten years, from the dining of the first round of the revolution to meal sale management system popularity from decentralised to access the campus network, both from a variety of .functions to a campus card-card technology matures, logistics management has always been at the forefront of reform on campus. But in recent years, various electric products on campus and high-tech products are becoming diversified, more quantitative era, abandon the old power .management mode, the power of commodity into logistics management reform a new hotspot. As the campus power management mode, metering modes and metering products in demand appeared. First, in the colleges of water, electricity management problems in the .current context: 1. in the area of management, in the absence of these products as well as the consumer's do not consciously, to student apartment fire safety aspects; 2, free water and electricity to the .students create a wasteful habits, regular human walking hostel lamp off phenomena; 3. use the vintage meter needs for meter reading, heavy workload, the charge is also a problem, often arise between members of the selection Committee Or .simply did not pay for electricity phenomenon; 4. social development students on their own learning and the increasingly high demands on the quality of life, televisions, computers and other electrical appliances in the dormitory has not uncommon that a new round of hostel .revolution trend will let go of power management direction. You can let go of power is also increased the burden of the school; Second, the IC card water saving / energy-saving equipment advantages: 1, IC card control system to improve water management; implementation of management science and modern. Schools to use smart card after water-saving controller, like bath, laundry, open water, etc. all with their own water-saving card complete, .on-demand consumption, automated clearing, so that the rationalization, service charges, scientific management, eliminate waste. 2, IC card water control system for schools economizing and save costs. Using IC card after saving water control system .not only convenience while reducing school expenses: IC card automatically clearing functions reduce logistics managers, thus saving the manpower and artificial unit wage costs; the former bath, laundry is often tap open to let the water arbitrary outflow, and IC card after water-saving .controller does not exist without running water, because every drop of water waste is a waste of accounting in the water, so as to eliminate the waste of water, and reduces administrative costs with a party and water expenses. 3 ., IC card water control system enables a wide range of social benefits. Use water-saving controller IC card, so that the water automatically clearing, achieve more accurate, more efficient; reducing water waste, conserve water, electricity, fuel and other resources, .also made a contribution to society. The promotion and application of the system mainly to improve the efficiency of water use, strengthening economic accounting, so that every drop of water can play its maximum effect. Its primary benefit is the primary source for saving water, .saving this part of the water heating energy consumption (ranqi, coal-fired or electricity, etc.), the fees of the three aspects of access to benefit from savings, followed by Save section property management aspects of sewage treatment costs is also an important .aspect. 4. energy-saving control system function characteristics 1) using special waterproof design, adapted to the baths and other environments. 2) automatic water control and .charging, you can achieve unattended, use the e-wallet transactions, avoid managing vulnerabilities and more scientific and efficient. 3) according to the actual water consumption or consumption billing deduction, water or power start billing, water or when billing is .stopped, the deduction of payment in real time, enabling individual consumption, consumers and contractors are fair and reasonable, taking into account their interests. 4) due to billing deduction is visible, the consumer will consciously reducing water use by increasing water .supply / power supply units use the turnover rate, and thus serve to conserve resources. 5) using real-time billing deduction, multi-use, no not more. Users do not need to use water power is consciously switching valve or .power switch, eliminate the waste of water / electrical phenomenon, saving valuable resources. Relative also reduces on water and power supply equipment capacity requirements. 6) to buy the card after consumption, an effective solution to early-stage investment for equipment ., training of conservation consciousness, Lee Lee Lee enterprises, has promoted the construction of spiritual civilization. IC card management facilitate accurate, improves management efficiency and quality. 3. use the intelligent control system analysis Water control and management system will produce a real economic and social benefits of? when payback is the school administrators are most concerned about. Let's look at the following set of data: Compare the installation after Setup .Average number of 1800 persons / bathing day 2300 person / day Students average pay $ 2 to $ 1.2 yuzi Water per capita water the 110 l 383 l Monthly consumption 18200 tons 6578 tons Monthly price .(2.5 Yuan / ton) 45500 16445 Per capita consumption of coal from coal 3.5 kg 1.06 kg Monthly consumption of coal 163.8 tons 63.39 tons Average monthly coal costs (300 yuan / ton) 49140 19016 Monthly gross income of $ 93600 71760 -Total expenditure of $ 94640 35461 This is one University in Jiangsu Province (a total of 1 million students and teachers of the school for 5 thousand people) during the .installation of intelligent control system, other factors are basically the same, the school Logistics Management Department carefully comprehensive statistics and actual test results. From the above table is not difficult to see, using the intelligent control system, while nearly .one-third of school revenues decrease, expenses were reduced to threeParts per second, monthly revenue around $ 35000 while saving water, saving coal are approximately two-thirds of the economic benefits are obvious. Let's do a simple analysis: Economic benefits 1, the control of the system is not installed before school bathroom weekly open 6 times, each time the bath time is 4 hours, an average of about 1800 persons bath, bathroom shower head .totaled $ 250, field measured a nozzle flow per hour about 0.7 tons. 2, this calculation, the bathroom every open once water consumption reached: 0.7 × 4 × 250 = 700 tons; students each time the bath was .: 60 minutes ÷ (1800 ÷ 4 ÷ 250) = 33.3 minutes (including partial bath after closing valve of waste water in time). Such as the use of coal heating, the price per tonne of hot water for $ 7 (oil heating to .about $ 22, natural gas is about $ 18). Normal bath time calculation, the average needs of boys and girls need 15 minutes to 25 minutes, while the actual average available 33.3 minutes with 13.3 minutes be mercilessly wasted. Therefore, schools open a .bathroom that has 0.7 × 13.3 ÷ 60 × 1800 = 279.3 tons of water to be mercilessly wasted; many expenses 7 Yuan / ton × 279.3 tons = 1955.1 Yuan ($ for oil, natural gas-6930 5670 element). According to the year bathroom .use 6 months time calculation, the waste of water resources in the schools, the cost is so shocking! 3. install devices operating conditions: after the installation of this system, because the bath head usage dramatically improve student awareness .of the importance of saving every day noticeably enhanced allows to increase the number of bathing to 2300, bath time is reduced to 20 minutes, each nozzle reduces water consumption per hour is 0.5 tons. If you press 0.07 Yuan / minute (oil, natural gas .required $ 0.22 0.18 element), then a day of net income to $ 0.07 × 20 × 2300 - $ × 0.5 × 7 (20 × 2300 ÷ 60) = $ 537. One year down to net income of $ × 537 (182 ÷ .7 × 6) = $ 83772. Now the average daily water over 300 tons, saving nearly in half. Then, use an intelligent control system will increase the burden on students? does. To the boys, for example, General bath for 15 minutes ., about consumer 1 Yuan or so, not only does not increase, but also will be less. Do not install this system will increase the fees, losses? the answer is no. Because of the increased rates will no doubt be some students to public .baths and bath bath school students will become less and less, this is not high income becomes more poor, in fact, this is also true of the loss of school baths "curse"; even if a fee increase, but if there is a lack .of effective management tools, not to save water, school baths also be loss. According to statistics, a quantity in the 300 or so heads of school bathroom, annual losses to 15 million Yuan, and intelligent control system, not only compensate for the losses ., the annual increase revenue shijiwanyuan, the benefits of using the system is self-evident. At the same time, the intelligent control system for small, quick return on investment. A set of 200 or so system, investment requires only one year, the .school shijiwanyuan is fundamental to be able to recover (mainly from savings). 4, using the intelligent control system, in the Festival's income at the same time, you can also bring many benefits to schools: . First, save the students' bath waiting time. In order to grab on, the previous 4 point open bathroom, 3 point half even earlier students wait at the gate too late to students in the bathroom, and a waste of valuable time .for students. Now not only not at the door, but also do not have in it, and so on, to wash, to speed up the bath cycle, facilitates students, extension of the bathroom. 2. optimized .bath environment. Overcrowding, wash before bathroom not good bath and wear well, a lot of trouble, and now due to turnover, the capacity of the order of the bath, bathroom, environment, washing of comfortable rest assured. 3. avoid embarrassment. See someone being bath nearby, so that and not let the awkward, acquaintances or teacher to the worse. Find the nozzle of their birthday looking around more bad, now have a number one, you can keep the change need .not let, completely avoiding the embarrassing. 4. fees and more equitable. More water fees, less water, less fees and, more in line with the consumer psychology students, while also avoiding certain students who deliberately wasted water ., delay time of bad habits. 5. reduce the labor intensity of the work. The system is a duty system, bathroom situated a managers sufficiently, staff can be reduced, saving labour costs, administrators no longer have to .worry about student not credit card, tickets, truly modern, scientific management, greatly improves the management level. 6. daily accurate bath number, income statistics report, no accounting loss. Social benefits . Our country is a serious shortage of water resources of the country, according to the material statistics show that China's per capita water occupation rate than the world average of 10%, while in the water so scarce cases, China's water .resources, waste and very serious, to conserve water has no delay. Although China has vigorously promote water-saving works, but only the propaganda is not enough, you must have a set of effective management methods and means, and the use of intelligent control .system is the University's waste of water resources, water management to one of the most ideal solution. Using an intelligent control system, all major colleges and universities most direct impact is obvious reduce water consumption, more than half the average saving water in. A million .or so colleges and universities, the average water use in thousands of tons, and intelligent control system, the annual saving 50 000 tons, of social benefits is amazing. Using this system, you can have a multiplier effect, can be described as "a .time investment, life-long benefit. " 4. intelligent control management system gains analysis More than ten years, from diningIn the first round of the revolution to meal sale management system popularity from decentralised .to access the campus network, both from a variety of functions to a campus card-card technology matures, logistics management has always been at the forefront of reform on campus. But in recent years, various electric products on campus and high-tech products are .becoming diversified, more quantitative era, abandon the old power management mode, the power of commodity into logistics management reform a new hotspot. As the campus power management mode, metering modes and metering products in demand appeared. I. .campus electricity management trends Hostel electricity management trends in the cost of the evaluation of schools The first stage of the old fashioned knife gate out each bedroom below $ 20 Low-cost, fuse fuse limit .load, no management function, not adapted to modern halls of power management needs of circuit breaker switch out each bedroom below 30 yuan, with leakage protection, each bedroom 50 Yuan In the load control mode switch on a new, equally no management .function, but in the dormitory has set the power outlet, on the resulting electricity metering and billing requirements powerless The second phase of the vintage meter transition products each bedroom below $ 100 In knife gate or opening switch after the introduction ., is a school management to adapt to the new situation of a transition means, because of the cumbersome, a vulnerability that does not meet the regulatory requirements IC card electricity transition products each bedroom 300 yuan In the same venue in .knife gate, each bedroom for pre-paid electricity system, measurement accuracy, security, centralized management of statistics, not widely promoted and national electricity Office and several provinces electricity sector at the beginning of 2001 has been issued a circular, are not permitted to continue .to promote the IC card meter, installed must gradually replace The third phase of the intelligent control system of intelligent products each bedroom below 350 Yuan With intelligent control products. By top software, networking, control management Terminal, you can .implement with a card management with automatic operation control, comprehensive and descriptive statistics summary function, functional, cost, and usability aspects fully meet College user requirements. Second, intelligent control products before use, compare, after use (A), the management of the comparison: ■ Intelligent control products before use: 1. in the area of management, in the absence of these products as well as the consumer's do .not consciously, to student apartment fire safety aspects; 2, free water and electricity to the students create a wasteful habits, regular human walking hostel lamp off phenomena; 3. use the vintage meter needs for meter reading, heavy .workload, the charge is also a problem, often arise between members of the selection Committee or simply does not hand over the tariff of the phenomenon; 4. social development students on their own learning and the increasingly high demands on the quality of .life, televisions, computers and other electrical appliances in the dormitory has not uncommon that a new round of hostel revolution trend will let go of power management direction. You can let go of power is also increased the burden of the school; < .br> ■ Intelligent control products: 1, high security, not only for students of electricity metering, also play a role are these and eliminate the fire and so disastrous events; 2. let go of power .to meet the students' learning, higher demands of life; 3. enhance the consumer's power-saving consciousness, significantly reduces the power resources of invalid expenditures; 4. prepayment type design eliminates meter reading, billing questions, or .difficult to reduce the workload of the managers; 5, to reduce the school on the consumer release of electricity generated by the burden. (Ii) costs and economic benefits: For a 1000 hostels .campus, for example, we can calculate the intelligent control system to the user. Intelligent control products before use: School district each Hostel in addition to the normal television sets, lighting and other electrical power, plus the amount of .power and other students of waste, every average electricity consumption of hostel 25 degrees; If the average of each dorm two computers, each computer average 6 hours / day, monthly electricity consumption is 90 degrees. Per unit of $ 0.5 standard calculations ., the school district as a whole should pay for electricity will reach (90 + 25) * 0.5 * 1000 * 8 = $ 460000.00 Apart from the daily lighting $ electricity due to liberalization of electricity, schools must also bear the additional $ .36 million. ■ Intelligent control products: When using electronic control system, because the school district's student electricity charge, students will consciously save electricity, then schools per month you can give each dorm 20 .degrees free electricity charges, saving over the accumulated. School students free electricity charging 0.7 Yuan / degree. Then A. paragraph 30 million investment in equipment. B. students should pay the electricity bill for the full .year of about 90 * 0.7 * 1000 * 8 = 504000.00; C. school district spending on tariffs of the year (90 + 20) * 0.5 * 1000 * 8 = 440000.00; D. the school's electricity 440000 - .504000 =- 64000.00 element; Calculation in accordance with the above, the school district uses intelligent control products of first-year school expenses for 440000 + 300000-504000 = $ 236000.00 than the same period of the previous year expenditure savings 460000 - .236000 = 224000.00 element; From the second year, due to the use of intelligent control products for electricity management, school not only saves electricity, at the end of the school district will also recover 64000 profits. . Use comparative earnings before and after Compare project before using smart electronic control systemAfter using smart electronic control system Management model releases electricity deregulation of electricity, school monthly free supply each dormitory, exceeding 20 ° electric .charges Average power consumption 11.5 million degrees 11 million degrees Year tariff paid situation 46 million 44 million Tariff seizures no 100% Tariffs of the principal schools 100% users School profitability without 64000 . From the above series of calculation is not difficult to see that the use of intelligent control products not only can meet the students' learning and life quality requirements, ease the school open electricity, but also as a self-financing .logistics group brought economic benefits. But after installing electric control system, power waste situation has been significantly improved, not only saving of nearly one million unnecessary waste, tariff collection rate can reach 100%. Thus, in the campus .socialization management reform, use control management system is a campus management trend. .

Tuesday, January 17, 2012

Weak current College】【multi-storey residential buildings and drainage design of.

Summary: this article on multiple layers of residential construction and drainage design selection of water pipes, pipe laying, water meter out home settings, the settings of the heater and air-conditioning condensation water discharge to explore issues and made .some specific observations. Multistoried buildings to its facilities in the simple, low cost, easy to property management, is very popular with small and medium-sized cities real estate developers and the general public. How to press 2000, .comfortable residence Tech Engineering residential planning design guideline requirements and increase the level of residential design, as each household to create a comfortable living space, every designer's responsibility. The heart of a residential building-kitchen, bathroom, is a function of the complex, health ., safety and comfort demands high, and create complex, high technical requirements. As a result, designers must be based on overall design concepts and methods, considering the kitchen, the bathroom drainage pipes and equipment installation. Here's high-rise residential drainage design selection .of water pipes, pipe laying, water meter out home settings, the settings of the heater and air-conditioning condensation water emission issues and discussion with colleagues. (A) water pipes selection problems .Traditional water pipe materials generally use galvanized steel pipe, galvanized pipe easy rust, short life, used for transportation of water does not meet the quality standards of health, Ministry of construction, such as disadvantage is to promote the application of plastic pipes. Many cities .have been expressly prohibited the use of galvanized pipe design, promote the use of plastic pipes. Plastic pipes compared with metal pipe, with light weight, pressure intensity, conveying liquid low resistance, resistance to chemical corrosion resistance strong, easy to install, energy- .saving in steel, long life and other advantages. Plastic pipes for water supply: rigid PVC (PVC-U), high-density polyethylene (HDPE), cross-linked polyethylene (PEX), pp (PP-R, PP-C) ., polybutene (PB), aluminum-plastic composite pipe (PE-AL-PE, PEX-AL-PEX) and steel-plastic composite pipe, etc. The following table are the several kinds of water supply pipe performance comparison. Pipe performance advantages .disadvantages of long-term use of short-term use of temperature temperature of PVC pipe (PVC-U) corrosion resistance strong, hard texture, easy with UPVC monomers and additives exudate, fitting adhesive technologies require high, the curing time length ≤ 400C- .pp (EN-US) PP-R, PP-C) heat resistance good resistance to creep properties, construction is simple, only with a metal pipe connection; flow local head loss, not recycling reuse 900C950C aluminum-plastic composite pipe (PEX- .AL-PEX) good heat-resistance, heat preservation performance (EN-US) at the same pressure and temperature conditions, pipe wall thickness, using hot-melt most, need special connections tool ≤ 600C ≤ 900C aluminum-plastic composite pipe (PE .-AL-PE) easy bending, oxygen permeability, completely fire coefficient of linear expansion is small, easy tube thickness thin uneven, pipeline connection with copper pipe fittings, water current local head loss big ≤ 400C - Note: .1) long-term working temperature means the pipes in this temperature range service life up to 30 ~ 50 years 2) short-term temperature means the pipes in this temperature range service life up to 10-20 years < .br> Tubing selection is the process of economic and technical comparison, technically from the pressure, temperature, use environment, installation method, etc. for consideration in conjunction with the requirements of owners and residential grades, conduct economic and technical comprehensive consideration .determined. The plastic water pipe can be used as residential living water supply pipe. Affordable housing reconciliation trapped room main face of the vast number of middle-income residents, the choice of sanitary PVC pipe (PVC-U) as water supply, to reduce .the cost of high-end commercial housing available in aluminum-plastic composite pipe (PE-AL-PE, PEX-AL-PEX) or other plastic water supply pipes as the water supply pipe. Domestic distribution point hot water temperature not exceeding 600C, .so the above pipe except PVC pipe (PVC-U) and aluminum-plastic composite pipe (PE-AL-PE), most of the pipe can be used as residential hot water pipes. (2) pipe laying .problem 1. to the drainage pipe laying General following ways. 1) prescribed in the kitchen, the bathroom corner. In the past residential design more this kind of laying, construction convenient, but .Ming Lu pipeline hindered House beautiful, households in the second most used when decoration light material given to hidden. 2) Ming installed in exterior corner office. This method applies only to a warm southern climate, the winter minimum temperature .not lower than 0 ° c to prevent the tube water freezes into ice, expansion crack pipe, households use. Pipeline laying in the exterior wall, the impact of building beautiful, is not easy for future management and maintenance. .3) laying in the pipe shaft. In this way make the room clean and beautiful, but pipeline logging consumes the bathroom area, and pipeline construction, maintenance is difficult. Bathroom set up centralized piping wells, pipes, the pipes are concentrated in the pipeline .well arranged, this is a comfortable residential kitchen, bathroom living embodiment of civilization. In my opinion: in upscale commercial building design should be considered when setting the toilet pipe wells, so that to improve the quality of the bathroom, but also solve the PVC .-u drainage pipe flow noise problems, improve the quality of indoor environment; for bathrooms smaller economic housing reconciliation trapped rooms, a warm areas in the South to the drainage pipe may consider laying in the exterior wall, to increase the use of bathroom space; .pipeline Ming installed indoors should be without prejudice to the kitchen, bathroom and the use of the sanitary equipment features. 2. water supply branch pipe laying Domestic water supply pipes diameter battle de ≤ 32mm, small pipe .diameters of plastic pipes, domed State, residential water pipes to medium to adoption. Water-supply pipes Embedment way are: 1) Dim located in brick lane.Construction in brick walls open pipe Groove, pipe Groove width of .the outer diameter de + 20mm, depth of the outer diameter pipeline directly embed de, ducts and pipes will be fixed in pipe Groove child. 2) for small diameter water pipe may de ≤ 20mm located at floor-dark .(land)-screed. The construction of the floor (ground), plate surface open pipe Groove, Groove width as de + 10mm, deep 1/2de, half pipe, embedded ducts and pipes will be fixed in the ducts of the pipe. .Aluminum-plastic composite pipe and cross-linked polypropylene pipe, pipe with metal pipe connections, use Dim to be established to increase pipe Groove dimensions and flow of a large local head losses. For the kitchen and the bathroom sanitary ware layout relative concentration of residential ., can be used to connect water separator, water separator is a multiple-branch fitting, health apparatus water pipes were received from water separator. This can avoid the buried pipe fittings seepage problem. Also reduces local head loss, reducing network costs. 3) drainage pipe laying Residential Interior horizontal drainage pipe yishe in this layer, so that the horizontal drainage pipe penetration can avoid wastewater pollutants such as entering the adjacent, pipeline maintenance also does not affect the normal .life of the neighbouring farmers. Kitchen sinks of horizontal drainage pipes in General in the floor surface access drainage pipe; floor drain drainage pipes shall be laid underlayer space. Now many peers are considered: kitchen floor tile, clean all .the time not to be set flush, no leakage, the kitchen is not set to leak, so that both avoid cross-drainage pipe into the adjacent, and increase the use of space in the kitchen. Toilet drainage in horizontal pipes laid in this layer .are: specific measures 1) improving the the bathroom floor. Ground potential high 150mm, using the back row-type toilet, washbasin, bathtub and floor drain of horizontal drainage pipe buried within the cushion. < .br> 2) with sunken bath. Bathroom floor surface subsidence 350mm, health apparatus horizontal drainage pipe buried in the sinking space. Both of these practices and bring bathroom cross-drainage pipe laying this layer of the ground and not .into the adjacent. Buried pipeline installation, construction quality must be strict, experience your qualified before the construction of the bathroom floor, so as not to leave for future use. Bathroom floor construction can fill the ash and other lightweight materials, may also adopt the .brick construction aerial laying the ground plate, ground waterproofing treatment to be done, can reference the roof waterproofing treatment, as do two oil a fabric waterproof rubber ointment. (3) water meter outdoor settings problem < .br> Water meter located indoors, meter reading of heavy workload, and the residential security and privacy is greatly reduced. The residence of the household water or a heat meter shows yishe outdoors. Multi-storey residential meter outdoor settings have the following form: < .br> 1. the use of remote water meter The ordinary water meters for remote water meter, by a signal wire connection to water Tables and data acquisition machine, and then to .intelligent management (PC). Its advantage is that a lot of manpower to meter, accurate data, the disadvantage is the high cost. 2. the use of magnetic meter Users advance purchase water .company e-card, then put it into the memory of water meters, water is the amount on the card is automatically deducted, this way users need prepaid water, water meter higher prices. 3. using ordinary water meter .is located in the outdoor 1) meter, located in the staircase rest platform niches. Household water supply pipes after the water meter measurement into the kitchen and bathroom. This method implements the meter out room settings, project equivalent low ., but water standpipe and a meter is in effect at the stairs. It applies to the South are warm areas, kitchen, bathroom layout location close to the stairs of the House. 2) meter set located in the water .(water meter box). Down to-water supply, on the ground floor are located the meter (water meter box), each household water supply pipes in pipeline well laid, South area is also available on the building exterior corner office along the route .; follow to-water supply, you can set the roof water meter (water meter box). In this way increase water supply branch pipe laying length, pipe laying along exterior walls of buildings and beautiful effect. Water meter out home layout choices, be .combined with the kitchen, the bathroom floor features and developer of the specific requirements of the above several feasibility plan for economic and technical comparison. Residential property management perfect upscale housing in the community may be remote water meter, it is .a future application development direction for meter; property management not perfect residential district of high-end commercial House, use a magnetic meter (in the water company of this business area can design) or centrally set meter (case); in the southern region of .modular homes available ordinary water meter is located in the stairs of rest platform to reduce cost. (4) the set of household water heater Residential design time should be reserved for the installation of water supply facilities in .conditions, or set the hot water supply facilities. So there is no centralized hot water supply of houses, consideration should be given to the installation location for household water heaters and hot and cold water piping layout. Home water heater are gas, electricity, solar .energy, etc. Gas water heater and water heater general installation in the kitchen or bathroom, building drainage design time should be reserved for a water heater installation location and hot and cold water pipe interface to make it easy for users to install their own decoration. .Solar water heater is easy to use, without the need for fuel and power, low operating cost, long life, no pollution, is very popular with our users, in the last few years many residential area in the design and construction is fully installed on .solar water heater. Solar water heater general installation on the roof, so that you need in the bathroom and roof water heater between hot and cold water pipes, residential design, if it does not consider the installation of solar water .heaters, household installations can only be hot and cold pipes laid along the walls, this increases the difficulty of installing households, increasing pipeline investment, and architectural beautyView. Therefore, in the water system design requires that you first consult the developer comments, whether uniform .design, construction of solar water heaters; or just reserve a solar water heater and hot and cold water piping installation location. Solar water heaters and hot water pipes can be laid in pipeline well; no pipeline well, you can bathe in the toilet near the .corner of a root of UPVC pipes de110 as solar water heaters and hot water pipe casing, in each household hygiene spacing a ground 1m Department de110 × 75 tees, as hot and cold water inlet. (5) air- .conditioning condensation water emissions In recent years, the air conditioning gradually into the millions, air-conditioning condensation water fugitive emission pollution in the external walls of buildings, is a beautiful living area. Water system design should consider air- .conditioning condensation water discharge of organized. Specific practices can reserve air conditioning outside the machine location side condensation water drain, drainage pipe selection PVC-U drain de40, the height of each layer air conditioners for easy drainage three reserved air conditioners and drainage hose direct access .. .

Monday, January 16, 2012

【 Weak current College 】 fixed air valve in the air conditioning is how to apply?

Constant air flow valve, is a mechanical device from force, apply to the need for air ventilation and air conditioning systems. Constant air flow valve air volume control does not require external power, it relies on the wind tube air force to position the control valve position, resulting in a whole range of pressure differential flow at pre-set flow.
In the fresh air system

At present, domestic, fan coil system for air conditioning or the more common, especially in the hotel rooms, most of the Office, the Office has in this way. It is usually located on each floor, aisle air supply unit laying new air dry tube, dozens of root-access from the rooms on the manifold. The hotel guest rooms, each room ventilation rate generally 100m3/h, how to do various branches of the air flow consistent? General, designers tend to add fresh air pipes on a flow control valve, expectations through late debugging tools to complete the air distribution. Because of the fresh air system normally for dry pipe, tube, short, and the air flow control valve regulation neither intuitive adjustment precision is not ideal, after all, each room ventilation rate only 100m3/h, the air volume is small, so debugging is almost impossible. Construction units can do to have your new air dry tube of total air, ensure that the air supply pipes are the wind. In order to guarantee the room by sending new design value of air flow reach, and without the construction unit to a room in a room of balance, we only need fresh air in each branch add decided on an air valve, the above problem is solved. In high-rise buildings in residential and Office people often have trouble not enough fresh air, and designers often feels wronged. Because from the drawings, new air standard value is not low, but we tend to ignore the question of how to design to ensure the practical effect, which air valve in the air supply system, is a forceful measures. Because of the current fixed air valve mainly rely on imported, the price is more expensive, the author proposes four-, five-star hotels, the upscale Office use is appropriate.

In the exhaust system

A good air-conditioning system design, it's exhaust system must be reasonable, which are often not taken seriously. In the civil construction especially in high-rise buildings, the building envelope for air tightness good, fewer air flow can maintain room of positive pressure value. About the new wind of 85-90% must be organized in the exhaust air from the outside, so you can guarantee that air, exhaust air volume balance, otherwise the number of new air cannot get into the room. In the civil construction, exhaust General through bathroom, hot water, and so assisted housing exhaust outside. In addition, sometimes also should add another set of exhaust system in order to ensure delivery and exhaust air balance. For the bathroom exhaust, the usual practice is to set each toilet, ventilator, only toilet with ventilating shafts on the exhaust fan interlock. We know, high-rise buildings in the fresh air system should be running all year round, the exhaust system should also be run all year round. That is, the person using the toilet may not be to control the open bathroom, the bathroom ventilation of necessity. Besides a large blower with dozens of such small fan exhaust system running both difficult to match, and not economic. Exhaust volume for 400m3/h bathroom ventilation noises have 40dB or so, so that the toilet without peace. Large bathroom ventilators are to maintain a great trouble. To resolve this problem, we can cancel the bathroom ventilation, exhaust shaft of each layer-add decided on an air valve located at the top of the shaft of a fan. This exhaust system that can guarantee various layer exhaust volume approximately equal, and system control simple, reliable, and the bathroom can be very quiet.

In VAV system

In VAV system, General, district VAV, using fixed amount of wind in the area, in anair flow, pressure changing air supply system, the inner area for air flow design is indispensable for air flow valve.

In the clean air conditioning system

In the clean air conditioning system to maintain clean room of positive pressure value is vital, in the exhaust air or exhaust system together with setting the air valve, can effectively ensure clean room of positive pressure value. When the operation clean operating room and do not need to maintain the operating room time pressure, surgery is the new amount of wind to ensure positive pressure needed new Air Canada staff in the new amount of wind, surgery is not a new amount of wind is only when that positive pressure required fresh air, fresh air tubes need to set up air-valve.

In the wind pipe pipeline balancing application

In all air system, due to the influence of architectural conditions, each branch is certainly not a balance between the resistance, generally use three-way valves or valve off more leaf to complete air distribution. In order to ensure the important rooms or main branch of the air flow would not be too large or too small, reduce debugging blindness can be added setting the air flow valve to replace the three-way valves or valve off more leaves.

Fixed amount of wind characteristics on the use

Fixed air valve is automatic, no need external power, plus electric actuator through remote control signal change in flow rate setting. Fixed air valve in the air exhaust system can be applied to the operating temperature is 10 ~ 50 ℃, pressure range is 50 ~ 1000Pa, i.e. the valve after application before valve 50Pa pressure differential at the very least, otherwise fixed air valve does not work. It should be noted that because the ventilation system air supply unit of air pressure value is generally not very big. Constant air flow valve installation location restrictions, but valve slice axis should guarantee level generally require a valve on the long side of the straight line distance 1.5 times the entrance to the duct and the straight line distance 0.5 export air duct. Constant air flow valve control and high precision, with external pointer display flow scale adjustment precision is approximately ± 4%, current limiting bodies do not need maintenance, and system Accessories, air valve rectangular, circular, insulation, noise control type can be selected.

As balancing valve in the air-water systems are increasingly being used by the majority of designers, will air valve because it accurately adjustable, automatic balance of features, you will be sent, the exhaust system has been widely used.

BR>

Wednesday, January 11, 2012

Weak current College】【cooling pad cooling principle, vacuum cooling principles and positive pressure cooling principle of distinction.

Cooling pad cooling principle

Cooling pad is a special paper honeycomb structure of the material, its working principle is "water evaporation absorption heat" this natural physical phenomenon, that is the role of water in gravity from top to bottom, dirty, wet curtain corrugated fiber formation water film on the surface, when the flow of air through the cooling pad, the water film in the Shui will absorb the heat in the air after evaporation, take a large amount of latent heat, the air temperature by cooling pad, so as to achieve the purpose of cooling.

Five characteristics of cooling pads:

1, high efficiency and energy saving negative pressure ventilation cooling system is to use the fan and the water curtain, artificial reproduction of natural moisture evaporation cooling this physical processes, the power consumption is only one-tenth of the traditional air conditioning.

2. ventilation throughout the system of mutual cooperation, exhaust fans quickly drained away indoor personnel, machine-generated heat, gas, odour, avoids waste and odor of stimulating the human body. The entire indoor air can update in one minute at a time, this is not possible to achieve general air conditioning.

3, improve work efficiency resolve muggy and oxygen deficiency causes workers decreased attention. Use cool water curtain products not only can solve the problem is the powerhouse of sultry in moisture evaporation cooling at the same time produces negative ions of oxygen, increase oxygen content up to the regulation of mood, alleviate fatigue in meet the efficiency objective.

4, health and environmental protection systems use water as refrigerant, manufacture and use of environmental pollution, water curtain with lower air humidity, also has a portable external air purifying dust and particles. Efficient circulation of fresh air, the effective prevention of occupational diseases and spread of diseases.

5, strong applicability water curtain type factory air conditioning system wide applicability, diverse crowd crowded, heat sources, or easy to produce pollution, ventilation of the workplace, can play a significant effect. Such as textile workshop, clothing shop, injection workshop, factory, shoe factory, electronics factory, etc., according to the different environmental design of the system, but also with the specific situation of regulating indoor different wind speed, air flow, very flexible.

What is vacuum cooling principle:

Is artificially reproduced "water evaporation absorption heat" this natural physical processes. In a closed workshop installation fan, on the other side of the installed cooling pad, the fan will plant in high-temperature air pumped out, the formation of negative pressure inside the factory, workshop or outside pressure errands outside air through the cooling pad to enter the building, the air flow through the cooling pad was cool, and plant in air heat exchange takes place, thus lowering the temperature inside the plant.

What is positive pressure cooling principle:

Use of high-speed blower air pumping into environmental protection air conditioner chassis, using the "water evaporation heat absorption" of the physical principles put into environmental protection air conditioning to cool the air in the chassis, while the cooling fan will be fed into the Interior of the air. Making indoor meet ventilation, cooling, and increasing the air oxygen, and so on.

Tuesday, January 10, 2012

】【Weak current College on water supply and drainage construction design FAQ.

Summary: in drainage design and construction, the strict implementation of the existing relevant norms, summing up the design and construction of installation of lessons, improve and enhance the overall installation process standards, and strive to provide the community with .functional and reliable, beautiful and practical architectural masterpiece. Article by building design and construction of water supply and drainage works, elaborates on the practice of design and construction of common problems and their solutions. Keywords: life in the water .supply system; drainage; architectural design First, domestic water supply system Domestic water supply system frequently asked questions are as follows: 1. from the urban water ring out .different pipe into the tube to the next residential community water supply, and the community water supply pipe and the formation of urban water supply pipe, the pipe into pipe pipeline leak located on backflow device. Because this situation is equivalent to community water supply main pipe .into the urban water ring of a connecting pipe, due to the city ring different pipe pressure cannot be the same, if you set the clock to prevent leakage, urban ring in the Shui will consist of high pressure to low pressure of the interfaces of the .interface flow, causing a meter to reverse and community networks in the pollution of water within the urban network. 2. squatting stools flushing tube still exist using ordinary valves and direct connections for drinking water pipes. This may be due .to construction or construction units in order to reduce the construction cost, or consider households will be the second decoration design for the sake of change. But the consequences of doing so is obvious, once the water standpipe reversal occurred for some reason, but at this .point the stool as jam full of sewage, will take place the siphon life water pipelines for flowed. Thus non-drinking water pipes using ordinary valve connection and control direct washing stool should be used with time-lapse self-closing and siphon automatically destroy the .functions of the stool time-lapse self-closing flush valve. 3. drinking water tank into the hole, snorkel, overflow pipe is not taken to prevent insects crawling into existence, measures to lower the siphon backwards, when .fles to drown out the flow tube top vacuum destruction device is not set; the inner wall of reinforced concrete pool and pool piping, metal accessories are not used on the receiving non-polluting materials. All of these are likely to result in drinking water or .municipal water contamination, to avoid contamination of drinking water in the sink hole cover and cover seat should match and close, and elastic non-toxic foam inlay in the seams; snorkel outlet and overflow pipe trumpet Department should have the copper wire netting or other corrosion .-resistant materials made of netting, the mesh is 14 ~ 18 mesh; overflow pipe exports from pool outside the ground level 200 ~ 300mm, light should be installed on the exit door or net cover; submerged discharge pipes can pool above the water level in .the overflow pipe inside the holes into the open, either submerged discharge may also reduce bath antisiphon backwards; pool finished water pressure test, the tank wall and pool piping, metal accessories should brush enamel paint, pool ladder in stainless. Second, the drainage system Drainage system frequently asked questions are as follows: 1. floor drain water height less than 50mm so easily floor drain dry, loss of other smelly function, odor pollution .indoor environment. Installation must be a qualified product, or you can take through the floor drain plus water bends. Floor drain installation height is reasonable, floor drain installation is too high, the surface will result in stagnant water, drainage function; installation is too .low, affect the surface appearance. During the installation of pipes for water, you should ascertain the floor drainer specifications and floor decoration layer thickness, to calculate the drain socket of a reasonable level. Current leakage model many selection, floor drain, it should be .based on a different location to select different type of leak. Public kitchen should adopt network box-type floor drain, toilet should be confined to leak, washing machine parts should be used to prevent overflow and dry special floor drain. 2. in the open manhole construction process, some construction personnel will check well made heavy mud well, failing to comply with the prescribed do diversion channel, resulting in a large number of bottom deposits of faeces. This is not only easy to influence environmental .health, will also affect septic tank treatment effects. 3. high-rise building set of UPVC pipes has not taken measures to prevent the spread of fire. The specification clearly states: high-rise building interior plastic drain pipe .downlead set and whose diameter is greater than or equal to 110mm the standpipe wearing floor office setting fire casing or collar, aims to prevent the underlying the spread of fire through the pipeline runs through the first layer. 4. terrace .roof rainwater drainage and, not separate settings for the connection. This results in a once rainwater riser a certain plug, roof rainwater through the balcony floor drain overflow; second General rainwater riser access rain check well, rain checks the well of the smell will pass .the balcony floor drain into the rooms, the indoor environmental pollution. Thus requires balcony rainwater drainage system should set up a separate, and balcony rainwater riser should indirectly drainage at the bottom. But if in life balcony considered washing machine placement, balcony drain now is .wastewater, stack drainage should access the drainage system, you cannot directly to outdoor or rain water system. 5. kitchen and toilet drainage pipe is not set, the layout of the near and the interior wall of the bedroom adjacent .drainage pipe is not a noise measure pipe. The residential building code "GB50386-2005 section 8.2.7 and provisions on this. In order to prevent the toilet drainage duct of dirty harmful gas conspiracy to kitchen, occupant health impact, when the kitchen and .bathroom adjacent arrangement, should not be shared with a drainage pipe, which should be in the kitchen and bathroom set up. To avoid sewer noise impact living, bedroom near placement and adjacent interior of the drainage pipe can not be used for ordinary plastic drain pipe .should be used in rubber sealing ring flexible joint mechanism of cast iron pipes, double-layer of foamed plastic drain pipe, plastic drain pipe inner spiral muffle noise reduction measures, such as a pipe. There are experimental data indicate that the flow tube when the .DN100 2.7l / s cast iron pipe noise value is 46.5dB, PVC-U pipe noise value is 58dB. Third, the fire water system R> Fire water supply .system of the common questions are as follows: 1. fire-fighting water supply network pressure test fails construction plan and specification requirements. Pipe pressure test score leak repair and strength tests carried out in two steps. Leak in atmospheric .or slightly up pressure state and pressure strength test points and test pressure in two phases. At present, some sites are only for pipeline leak test or the test pressure is not in conformity with the design and specification requirements so that the normal operation of the system .brought trouble. In accordance with the specifications, network installation has been completed, should be strength and tightness test. For potable water and fire water pipe, test pressure for the pipe work pressure of 1.5 times, and not less than 0.6MPa. Strength test .is under the pressure of the pipeline network in experimental 10min, pressure drop is not greater than 0.05MPa is qualified. Then the test pressure slowly fall to work under pressure, check no leakage, the tightness test is qualified. For automatic sprinkler system. When .the design working pressure ¡ü1 .0 MPa, water pressure strength test pressure is the pressure of the design work, and not 1.5 times lower than 1.4MPa; when the design pressure> 1.0MPa, water pressure strength test pressure shall be the working pressure 0.4 .MPa. Water pressure strength test is under the pressure of the pipeline network in the experiment, pressure stability 30min not greater than 0.05MPa is qualified. While the pressure tightness test should water pressure strength test and pipeline flush after passing the test pressure shall be designed .to work under pressure regulator 24h, no leakage is qualified. 2. a sprinkler system installed in the ceiling area of the upright sprinkler and beam distance does not meet the specification. Especially in the original design by a ceiling layout .nozzle, and the actual installation of the ceiling is not set, building and construction does not require design modifications only simply hanging-type nozzle instead of the vertical-type nozzles, the nozzles and beam distance in particular does not meet the requirements, there are .complex roof beam layout, irregular, designers in the layout when you failed to consider fully the nozzle, construction unit according to the layout of the design the nozzle actually meeting the specification requirements. At this point, construction personnel should promptly notify the designers make modifications .to the original design, on local problems, also under the automatic sprinkler system installation and acceptance of GB50261-2005 section 5.2.8 themselves to reducing the beam on the sprinkler effect. When this specification is difficult, the splash plate and roof should not be .greater than the distance and nozzle 550mm splash plate can not be lower than the bottom beam. 3. hydraulic alarm sprinkler system is not set on the public channel or walls of the signal. When you use the site in case .of fire, fire sprinkler system is powered up, the alarm sounds cannot be on duty personnel or other persons in the protection of sites found that relying on fighters in a timely manner, resulting in unnecessary loss of property and casualty, and after the fire fight .water control valve not conveniently close and maintenance checks. 4. fire hydrant system pressure reducing valves model options. General Designer in fire hydrant for fire protection design 1.00MPa hydrostatic pressure of not more than, to avoid system piping layout .of complex, are not taken to partition the water supply system, but through the selection of vacuum type fire hydrant to meet specifications for fire protection design on fire hydrant outlet pressure of not more than 0.50MPa requirements. In this way adopts the position of vacuum .-type fire hydrant to many, select decompression should be according to the type required by the fire hydrant water inlet pressure range select the corresponding type of fire hydrant. IV. concluding remarks In short ., we either in design or construction process, should be strictly enforce existing related specification, summing up the design and construction of installation of lessons, improve and enhance the overall installation process standards, and strive to provide the community with functional and reliable, beautiful and .practical architectural masterpiece. .