【 Weak current College 】 on a table in a meter selection and application

As urbanization speed speeding up, residential water not only to ensure adequate, improve service quality; while accurate measurement, install rational, not disturbing, investment, return quickly, these are the objectives pursued by the water supply enterprises. As one household, a table works step by step, table selection and installation is very important. Especially in a modification of a table, selection of a meter, the precision of a direct impact on the business benefits and return on investment. The following combined with the actual conditions on the water meter selection, farmers table modification. 1. water meter selection in recent years, China's population grows, more and more scarce water resources, water pricing is forced to increase year by year, in the actual meter reading process, the master table reading and to each House of the meter readings and the gap is large, about 30%-70%, according to different regions and different. This directly affects the water fee income, in order to strengthen the management of water resources, reduce the leakage rate, reduce improper use of water, the water supply enterprises want to invest a lot of money, will replace A scale into precision high level B-level table, to prevent users from unauthorized removable water meter and addition of anti-theft clips or anti-theft heat shrinkable film, to some extent reduces the leakage and improper use of water. But B-level table GB provisions flow 10L/hour for qualified, as in recent years, the price of water has increased, in particular the use of the launching in flow meter, on small stream dripping phenomenon is becoming more and more common, especially after the abolition of the table base fee, this phenomenon has become more and more serious. According to the survey, each household monthly water consumption is 3-12 tonnes, and in some areas, individual user monthly consumption of less than 1 ton to reach 30%-50%. According to statistics, recurrent drop small stream water, measured every drop of water, 200 to 300 litres per household per month than normal water consumption up to 6 tons, annual average up to 80 tons, without wastage of water metering, to supply enterprise a big loss. Investigation revealed that the water supply enterprises in general loss rate is 20%-60%, much higher than the national standard of 12%. Removal of fallen due to such factors as aging network created by the run, run, drip, leak, irregular water drop small flow phenomenon is water loss of important reasons. Because water is inadequate commercial publicity, the stolen water they will exchange experience. As water pricing, leverage meter itself is not illegal to stolen defects water force will yearly growth of this phenomenon worth pondering! maturing in meter technology, anti-drip surface world, water is gradually replacing conventional B-level meter as the launching in flow lower some protection against dripping water meter (national standards are being developed). To further prevent water loss, improve the accuracy of the table, has reached the economize on water, the purpose of the effective protection of water resources, increasing the degree of civilization in society, so that the water supply enterprises go out drip water loss dilemma. Now many of the water supply enterprises have the efforts in this direction and has achieved gratifying results.
(A) water loss of main reasons
1. malicious theft of water: Water Division should focus on troubleshooting various water users, its surrounding water pipes are detected to be punished;
2. non-human intentionally drop of water: some old household water supply equipment, failure of dripping or long flowing. Such as toilets, faucets leak connectors, piping, etc.; leakage
3. person intentionally drop: this is some people use the existing water meter metering accuracy is not high for this feature, place a small drop of water flow. This kind of water a day you can drop of 180 litres-250 litres, enough normal users a day of living water;
4, people steal water: mainly anthropogenic malicious clearance table such means as the flip meter.
(2) the dwellers don't spend money on water: no way to remove tables, flip and dripping water
1. remove table: needs to understand the ways technology is as follows:
(1) open water meters, water meters internal impeller broke off a few slices, so that the water meter walk more slowly.
(2) after removal of the table, you can destroy the metering gear by water meters apart and then into the point of sand will be measuring gear card die go to implementation;
(3) remove table with bicycle spokes sharpened the table after insert into eight live impeller to steal water.
2. flip down the water meter and then in the opposite direction on the use of water, usually when the flip is mounted with a half, and then reverse decoration and a half, this approach does not require any technical content, it is easier to achieve. But now there are anti-disassembly and Assembly of a clip or heat shrinkable film. Water meter was blocked after the death of the general public will never steal water.
3, dripping water meter measurement accuracy: the existing low starting flow are 8-10L/H, when the water flow into fine chopsticks so when neither a meter thick. This way, and these two different is that the water meter is statutory measurement instruments, users do not need to remove the table, it is not against the law, even if it was found that there is no way, this is the most water Division headache problem.
Second, the family table modification, installation and application
(A) households always to the general direction of the table modification is household move, its balance sheet strength:
1. eliminate disturbing phenomenon.
2, mitigation of water leakage, conducive to enterprise management.
3, effectively limiting the user fees and stolen water resistance.
4. water meter to the downstairs branch pipeline growth regulator of enhanced, more accurate.
5, the business community and gradually transferred to the residential water management, also resolved the summary property sector because of the score table reading more and pay shouldn't pay for excess water. Overview of advantages on the old community in accordance with "uniform layout, piecewise, mature piece of a piece of" principle, the new community design started water meter must design in the open, in principle on a transfer or a new installation of the meter must be launching in flow reached 1L/hour anti drip precision grade. At the same time the temperature in different regions should be according to the different circumstances put out home water meter design in place, the above zero to prevent Frost crack meter. If you can put in the Northeast region is concentrated in the basement; North you can drop in at the deep well outdoors or insulation measures. Southern region you can directly install outdoors.
(Ii) unconditionally out home old community: one reason can't out home, you can try the following:
Ⅰ. energy-saving water meter anti-drip meter: currently there are two different principles of anti-leak meter：
1. small Jet water meter works: small Jet water meter. That the water meter traverse wheel box to open a small hole in a small flow, the water of the small flow of kinetic energy concentrated in one go promote impeller rotation, so that the impeller to achieve the purpose of the micro-flow metering. This table of Holter monitoring flow generally 2L/H. Be more efficient to prevent dripping and placed a small stream. In recent years production table manufacturers a lot, and this table is also a lot of the water supply enterprises. Table inadequacies is filter relatively smaller, Jet with small holes are too small, easy to sand clogged and card died, after a period of time (usually three to five months) after losing anti-drip role; the structure of another flaw is that the reasonableness of the pipeline installation requires relatively high, because this kind of table of movements of high sensitivity, low flow rate is concentrated in one place on a Jet water meter, which will cause water pipe pressure instability and that the water meter have a greater potential perturbed (that is, the user will close the taps without water, the water pressure due to instability caused by pipe network meter "idling" phenomenon), this diving-General up to 192 l/day (a month even if no water is also walking 5m3 ~ 6m3 tap water) that led to the wronged to water users, causing user complaints and the staff of water charges. Many areas of this phenomenon more serious, it is recommended that you use when you want to combine this region specific water quality and supply.
2. integral diaphragm anti-drip meter working principle: the integral of the diaphragm-type water meters. Its main characteristics is the increase in water meter body1 bottom a cavity, upper structure remains the same with ordinary water, bottom chamber communicates with the outlet, separated by a soft silicone rubber diaphragm will separate the top and bottom sealing Chamber; in a outlet within the anti-drip mechanism-the valve sensor. Dripping water is water in the water at the bottom of the cavity, dripping, soft pressure diaphragm in into the role of the difference will be down transformation, when the bottom of the cavity of the water is dropping, the differential pressure reaches the set point, disengage in the outlet anti-drip mechanism opens, running water through the impeller to supplement the bottom chamber exhaust water, anti-drip institutions open to additional water at the bottom of the cavity is one greater than the process of launching in flow meter, thereby promoting water impeller rotation, reached the measurement results. This supplementary water is intermittent, the cycle of water leakage measurement process is interrupted. This way of launching in flow meter can reach 0.1L/H, General drinking cup volume is 0.2 l, 2-hour drop one of paper cups of water, water meter will measure. When a user normal water, anti-drip bodies drifted away and not back off, tap water from anti-drip mechanism and outlet clearance in normal flow, so that the water meter into a completely ordinary water meter. This diaphragm anti-drip integral-type water meters for the biggest advantage is, as the use of streaming technology, which allows any contaminants in tap water will not be blocked and stuck the anti-drip mechanism; in addition, specialized for anti submarine dynamic considerations, so the anti submarine dynamic performance far superior to Jet water meter, anti-drip also superior to the current General water meter, so it is the most advanced anti-drip meter, can be really can be used for actual anti-drip meter
3, water-saving-anti-drip meter performance characteristics:
1) lower start flow, starting flow less than 0.5L/H, than ordinary water meter increases more than 16 times;
2) 0.5L/H ~ 14L/H of micro-flow state for intermittent measurement (seems like volumetric water meter), and the micro-flow range of measurement error is small;
3) 14L/H at maximum flow rate of flow, anti-drip mechanism from the working state, this flow ranges this product completely and ordinary water meters; its measurement and indication error total and as in ordinary water, GB/T778-1996 water meter;
4) of this product in the anti-drip mechanism Department through the particles and 4mm following impurities, and will not be their clogging and stuck, you can ensure the anti-drip mechanism works 10 years;
5) the product has good anti submarine dynamic performance, its dynamic anti submarine performance with diameter of B-class rotary wing speed meter 4 times better;
6) by the Ministry of construction and the China Water Association bringing together experts in the identification of products and technologies, its technical achieve the domestic leading level;
7) secure anti-removal membrane, guarantees that the user has not removed, you can put an end to remove the table table stealing water phenomena, and this film low cost, easy to clone.
Ⅱ. table I C card IC card table features a resolution of the "look-up table not households", changed to use the traditional water bill payment after payment mode, because the IC card table has a metrology control functions relate to the interests of supply and demand, and consumers are buying water in advance, so the quality of the product requirements. Currently on the market mainly table IC card card type and of two non-contact type. As the card type meter card mouth regular wear, easy contact, no moisture, so now the majority adopt non-contact. In the selection of IC card table table when the question is:
1. the best anti-hacking performance currently on the market of the majority of IC card tables have varying degrees of poor performance against attack. The water supply enterprises in the selected table when you want to pay more attention to this point, the controller IC card tables are part of most Reed pipe or Hall element to control. The components in the strong magnetic field (magnetic surface of up to 3000 Gauss magnets, the market price of $ 10 a piece) of slow, will not be changing, vulnerable to attack. Just find a good attack points can attack succeeds. So now the solution is used to control the PC program, such as Beijing Hui yi company practice is to set the program on PC programs, release certain per minute square wave, if this square wave cannot return or return waveform changes, then the control system that is under attack, one minute after the automatic valve so that it is a great way to solve the problem, the attack prevention anti-hacking technology has been a national patent and a number of water supply and water meter manufacturers.
2. Super waterproof performance residential table is generally in the kitchen or bathroom, the air humidity is very high. There is also the North's rural families fear frozen in winter, the table you want to knock out 1-2 meters deep well, will tableIn well water. This requires the IC card meter to damp-proof and waterproof. Now most of the manufacturers of the card tables are also does not have a long soak in the water of the technology, at least not yet considered, or not doing research in this field. But Beijing Hui yi of IC card meter is done considerable research, IC card water meter can be soaked in water all year round without affecting the performance of the meter.
Ⅲ, wired
1, valve-type water meters-body network features are automatic meter reading, remote control valve switches, and can drop watermeters matching, real-time monitoring of water status, have accidents and man-made damage meter demolition of the water meter, water meter tilted at an angle of about 45 degrees are in the Control Center computer alarm display. To achieve water pricing capabilities. In the construction of wiring when blocked, because the old community renovation, residential wiring already decoration is complete, you want to punch, residents compare antipathy, construction up to a certain degree of difficulty. Table base tables and smart body, base cost is relatively low, but it fails on the overall cost of demolition, maintenance, and require special equipment on system maintenance, maintenance of high technical quality.
2. Add a base table-reading-reading remote meter and data remote transmission system, is to use a remote camera principle directly reads the table with the word wheel on the data of meter reading systems to automatically identify the table with the values displayed in the window and what the display to the Administration Center, make sure that the remote reading of data with the data in the table, remote meter reading is not the purpose of remote metering, should not be involved in the delivery process of value, it is not a legal sense of the measuring instrument. Secondly, direct reading machinetable fails, can be removed without affecting the remote system. Remote system is one of its accessories. When someone is blocking the camera, use the opacity of the water meter above or with water gauge glass color is to meter reading has caused great inconvenience.
Ⅳ, wireless remote water meter system wireless remote water meter system and cable principle is the same, just the difference between wired and wireless, wireless remote, in recent years the factory product, due to meter the built-in battery capacity and environmental pollution on radio, radio transmitting power is not possible to do in city-wide communication skills will be a certain impact, if in the future to solve these problems, the prospect of significant, because the construction eliminates the construction process and residents user disputes. So no matter what tables, how to transfer all have their own advantages and disadvantages, but from a measurement perspective, meter precision is the number one, meter metering accuracy is not high, remote system, however good a waste, so pay attention to the accuracy of the table, the table of quality is the water supply enterprises metering, the first thing to do, directly affect the efficiency of enterprises. The above analysis suggests that the water meter of defects, in water development process just played a role in the middle of excessive; prepaid smart meter more convenient, also require anti-drip function, its overall work performance is to be further improved; anti-drip meter must address the potential problem of dynamic and stuck. Gains, passing of psychology is a drop of water, but not everyone is afraid to blatant to do illegal things, so to prevent water loss and dripping water theft occur, mainly from the product technological and crime prevention, improve product technology content, eliminating the chance of a variety of people. Our Beijing Hui Yi industrial trade co., Ltd, it was in the "security" of innovation ideas, after years of design and development of water-saving anti-drip meter and anti-hacking anti-drip waterproof-non-contact IC card meter, to the current domestic water supply enterprises meter transformation provides a safe and reliable products that can be a good solution to the existing water supply in some of the practical problems of enterprises.