Weak current College】 【ultra high floor elevator system selection.

<br> <br> Description: in a high-rise building, rapid, efficient and smooth vertical services. Elevator as vertical transport, on the number of the configuration, control and related parameters selected would not only has a direct impact on the building .of a capital investment of approximately General elevator buildings with a total investment of 10 per cent), but also affect the safe use of building and operating services quality ... <br> Keywords: high-rise elevator system selection application <br> First ., the configuration high-rise high-rise elevator <br> In high-rise buildings, fast, efficient, smooth vertical services. Elevator as vertical transport, on the number of the configuration, control and related parameters selected would not only has a direct .impact on the building of a capital investment of approximately General elevator buildings with a total investment of 10 per cent), but also affect the safe use of the building and operation of the quality of service. In the building, the proper selection of elevator number ., capacity, speed and control is important, but the elevator in the building shall be selected and installed using almost become a permanent fact later if you want to increase or modification is very difficult, even impossible, therefore, the design should start in the design .of the elevator should be fully configured. <br> Generation of high-rise buildings are mostly in around 100 layers, building large population movements within the vertical traffic relies primarily on the elevator, effective design of high-rise building with elevator, the key .is to use a variety of local elevator service and local area elevator system organized. Access to the local area, starting from the ground to the local regional Office of the air-lift quick shuttle between the elevator for service, passengers arrived at the Office of .the air-stairs and elevators transfer interval. In order to bring passengers to speed delivery destination, general building every 30 ~ 35 stories for a local area. <br> In the configuration high-rise elevator should note the following: <br> 1 .. a single set of elevator limitations of viable elevator is eight. <br> 2. in each elevator floor area (Office building) above the floor number should not exceed 15 ~ 16 layer (layer is 18 ~ 20 layer). <br> .3. the typical office building elevator load single layer: 1350, 1600 and 1800kg. Double: 1350 1350 /; 1600/1800/1600; 1800kg. <br> 4. typical air corridor / sightseeing lift load 2040; 2250; 2500kg. < .br> 5. lift the vertical acceleration in 0.9 ~ 1.5m/s2. <br> 6. lift speed bias overcome long-stroke; typical free reducer elevator speed: 2.5, 3.5, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 ., 10.0m / s etc. <br> 7. maximum traction elevator trip to 600m. <br> Second, the tall high-rise elevator control system <br> Due to the high-rise building with elevator system, in order to improve .efficiency in the use of the lift group to quickly meet the needs of passengers, to shorten the waiting time, as this should adopt microcomputer elevator control system, through the computer control system to handle a large amount of information in a timely manner, determine the .platform call information and the elevator position, direction, the open-closed state, the car in various States, such as to improve the delivery capacity, improve service quality, increase the economic benefits of hyper-building. Elevator computer group control system mainly has .following several aspects: <br> 1. car arrives before the docking station, arriving at the ends of the platform speed before forced to slow down, stop, and avoid hitting the top and flush bottom to ensure safety. <br> 2. cabin .passengers to reach the platform to register and answer signal via the LEDs as, reaches the platform before the stop, with number, terrace on the waiting passengers call to register and make a response signal. <br> 3. loaded with straight, just stop .car passengers specified platform. <br> 4. when the car arrives at a platform but no load, another platform call, the car and the other in the same direction of the car compare to call layer of distance, near their arrival call station and .arc number. <br> 5. end the call, the call to the platform passengers to-end platform cabin and unloaded car close to the service. <br> 6. in the platform sets the cabin position monitor, on the platform to forecast ., elimination of passengers passengers anxious mood, all while allowing passengers to move ahead to the replies, shorten the elevator waiting time. <br> 7. platform call was answered, the registration of the car when you arrive at the platform should have sound advise .passengers-ladder. <br> 8. operation of the platform car scan, depending on the speed of the car or platform is no call to decide whether to stop <br> Car. <br> 9. the passenger platform call cabin, and .the platform can provide service of all elevators are made of the transponder. <br> 10. the control room of the elevator group classification, singular-stops and stations in the area, all elevators are to end station to end, in the middle- .tier stand, singular-platform call area layer platform of car, control room not to be registered, no answer, conversely, too. <br> 11. intermediate platform calls directly to the elevator is not registered, not to answer. <br> .12. car completed transfer task, if no call signal or perform other services is indicated, then lift over the platform, car door open and wait for the other call signaling. <br> 13. control system elevator status at all times to monitor, .while scanning the platform of the call status. <br> 3. high level power supply system of super high-rise elevator <br> High-rise elevator of power supply system is generally a configuration of two-channel independent of power supply to ensure .that the lift power to prevent the interruption of power supply of the elevator so that passengers stranded in the elevator. When all the power failure or maintenance, another way to power automatic switch. If an accident or large parts of the second power supply interruption or .power supply, then the power supply system should be converted to the third power, Super third power supply by diesel generators. When the third power also fails, only rely on battery power, the battery will give the floor of the public channels provide emergency lighting .and emergency power supply power to the lift, rest, and be able to continue to work to maintain lift. <b> </ b> R> 4, Elevator grounding system <br> Modern elevators refers to computer system for control, Elevator grounding .system becomes complicated. It includes signal grounding, security, ground fault protection and lightning protection, etc. <br> 1. signal ground <br> Signal grounding for elevator computer control system, it is to ensure that the signal has a stable baseline potentials .of grounding. China's present on the market of the lift products widely used in the control systems and programmable controller <br> LC or micro-computer (a single computer, PC, smart group). The control mode of the control center are fairly high .CPU speed, its operating frequency up to 1 ~ 7MHz. In such a high frequency, the connection between the computer and devices, like antenna cable, you can receive the external RF interference, but also radiates RF signal, cause electromagnetic interference of a computer .site. In addition, because the elevator control system computer running voltage low, usually 5-24V, it requires that the computer premises data processing device common-mode voltage between the various units, as the need to set a frequency in the computer is running .under high-quality, low-impedance, stable potential of grounding system --- signal grounding system. <br> Signal grounding system is a stable computer processing unit signal potential for signal wiring system returned independently. It can be connected with the Earth, .but they are not allowed to have a good working current flows through. If no connection with the Earth, to the suspension for the system of reference potential, known as floating system. Signal to the principle of composition is based on the circuit of decoupling to .achieve equal potential, thereby eliminating or inhibits the cell signal loop through the global loop produces public impedance coupling interference, avoid the formation of magnetic sensitive Central wiring. Common signal wiring system structure has two kinds: star shape and network. <br> Star shape .system requirements according to the signal to flow to the wiring (benchmark), in the area called single construction electrical grounding. The system application in 10kHz ~ 3MHz better. NET system is an extension of the star shape system, from a point into a equipotential .reference plane. Elevator equipment according to its own special structure hierarchy properties to its computer system often signal is set to star shape. <br> Lift the computer system signal to actually work on all computer equipment and the establishment of standards, and other potential point .<br> Or, they are actually considered high frequency grounding, ie high-frequency signal ground. Without taking into account the strong electric equipment failure, and Lei voltage electrostatic charge relief issues, allow use of floating system, but its Earth resistance should be .greater than 1 M Ω. <br> 2. the safety ground protection <br> Safety ground fault protection is to protect the personal safety of ground, its essence is the equipment of the various components of all conductive metal shell through the electrical wiring of .its mandatory grounding, thereby avoiding device metal can conductive shell possible dangerous voltage on the person and the threat posed by the device. Our elevator manufacture installation specifications particularly stressed the importance of safety grounding protection, GB10060 - 93 the elevator installation acceptance Act: grounding .line of color is yellow insulated wire, except the following voltage safety-36V electrical equipment for metal cover should be provided with an easily recognizable grounding-side, and there is the good earth, Earth wire should be directly connected to the Terminal on each line .after the grounding. Specifications highlighted in the main terminal connected to the grounding line of direct-threaded, and shall not be used to reduce the total resistance value, to ensure the elevator the electric electrical equipment ground fault occurs, the device will not produce metal .shell contact voltage is too high, and in the setting of minimum time produce sufficient fault currents make protection of reliable action. <br> 3. lightning protection <br> Lightning protection belongs to the design and construction of electrical installations, lightning protection and earthing .systems of buildings to energy discharge lightning, cited in order to guarantee the security of buildings and equipment. With the further development of the building technology, further improving the lightning protection system, coupled with the elevator the nature with special structure hierarchy, the building of .the mine and elevator, such as the International Electrotechnical Commission standard IEC1204 - 1: 1990 in 1.2.18 of explicit references to lift guide rails can constitute lightning metal fittings of the circulation channel. Elevator equipment safety ground profection equipotential bonding measures after lightning and .the lightning resistance capacity will have varying degrees of improving, on bare building outside sightseeing lift must have the appropriate lightning protection measures. <br> In a real project, above ground are separate earthing device is often very difficult to achieve, and the usual use .of common grounding device. General requirements common grounding resistance is not greater than 1 Ω. Grounding line can take a cross-sectional area of not less than 16 mm 2 mm copper wires (PE) for the first-to-building distribution indoor PE cable .are connected, and can be viewed with the lift power cable laying, grounding line terminal and elevator room of auxiliary equipotential plate. <br> 5. lift the weak electricity system <br> Elevator in addition to the device itself is equipped with various power .and surveillance devices, also in the elevator car and elevator room within the set and can be wired intercom of telephone and electronic equipment, emergency Bell. With more than one elevator group control buildings also has accident running operation up to monitor the elevator exception and emergency .operations. Now in many buildings with many computer systems, such as building automation system (BAS), fire alarm linkage control system (FAS), a security monitoring system (SAS), these control systems are monitored for elevator, its purpose is to strengthen .the management of the elevator, improve elevator usage, reducing energy consumption, to provide comfortable, quick and safe environment. <br> 1. building automatic control system elevator monitoring <br> Building automatic control system is a computer on building device implementing integrated management .and control. Its elevator monitoring capabilities for: <br> (1) Elevator of run time control number; <br> (2) elevator operation monitoring; <br> (3) voice reporting services system; <br> (4) power .failure and emergency treatment; <br> (5) regularly inform maintenance and maintenance of single-listedAnd so on. <br> 2. fire alarm linkage control system elevator monitoring <br> Fire alarm linkage control system is a separate subsystem, its main .function is to monitor a building fire, its elevator outages and priority recognition than other systems. Fire alarm linkage control system elevator monitoring capabilities for: <br> (1) normal elevator usually affected by building automatic control system monitoring, when there is a fire ., the elevator is straight at the first floor, do not answer any internal and external call swap, back to the door after the first layer, cut off the power to stop using. <br> (2) fire elevator in case of fire, .the elevator is straight first-tier standby, cut off the normal power supply, emergency power supply. <br> 3. security control system elevator monitoring <br> Security monitoring system on elevator monitoring: in the elevator car and gate monitoring, installation of .access control system, Elevator according to IC card records security level automatically run to the floor. <br>.