Strengthen the management of pressure relief valve inspection system, pay attention to observe the work of decompression valve itself. Before the valve, the value of the pressure near the valve is close, indicating that the valve has its own fault. The piston valve and valve body between the flat sealing rubber damage; diaphragm adjustable valve main diaphragm rupture and O-ring damage, and the pilot valve connected to plug the pipeline, resulting in decompression Valve decompression weaken or invalidated. This is extremely harmful to the district network. In particular, many water supply equipment may explode due to overpressure and must be promptly repaired. ? Proportional (piston type) valve on the valve body aspiration gas leak if there is more than drip, indicating that a few files on the spool O-ring has worn, to replace the seal. However, when disassembling and disassembling decompression components, we must be cautious and careful to replace the inner seals; debris should be cleared of debris, do not use metal rods, hard stem pry valve activity parts, the use of wooden hammer and wooden handle percussion vibration, Slowly remove the valve trim. When repaired, reinstall, be sure to align with the flow direction on the valve. (6) Check the installation position of the proportional pressure reducing valve. High-pressure relief valve design and installation of the wrong place, there will be pressure valve after the valve fluctuated, pipe pressure deviate seriously from the allowable range, with the destruction of the shower, pipe burst and damage to the user meter and other accidents; and sometimes Poor water flow, there will be irregular water within the partition phenomenon, affecting the user water. Appear a similar accident, check the pressure relief valve divider water supply system, no doubt to find; disassembly valve and other components without exception; some property management units even doubts the technical performance of the valve, multiple replacement of the new Pressure relief valve, it can not solve the problem. At this time from the check valve design and installation of proportioning valve is reasonable to start and carefully check the pipe network system is the phenomenon of inverted pigeonhole, that is, the partition of the output pipe elevation similar. Such cases in the main building, the same roof sub-floor, under the water supply system is very easy to appear. Found these problems, you can consider the installation of proportional relief valve to raise the level of a (not too high, we must take into account the pressure within the partition water equipment specifications); can also be in the main, deputy building, divided into two independent Proportional pressure reducing valve water supply system. Recently, we encountered a water supply problem of a 28-storey high-rise building (Grade-II building, commercial and residential office, entertainment, catering in one complex), several of the vertical water supply zones were above the accident, prompting the design units and Property management racked their brains. After we lift the pressure reducing valve element by one layer, the problem is solved, as shown in Fig. 1 (Such failure generally occurs in the static pressure water supply system). Figure 1 valve design and installation location improvement (7) pay attention to system sewage. High-rise building fire water supply system fire hydrant pipe network, the sprinkler head pipe network is composed of a rooftop water tank - fire main - pipe (fire hydrant, sprinkler - at the end of Central Explorer - fire pump - pump inlet) and other closed ring network. Normally, the water in the pipe network is at a standstill (except for the detection of water discharge by the management department), the dirt impurities deposited on the bottom of the roof water tank are introduced into the fire pipe and deposited on the U-shaped part of the pipe loop, Testing must be intermittent start-up test, and sometimes discharged within the sludge muddy water to spend tens of minutes. Even if the fire pump can barely start, but set in the pipe network of various types of decompression components because of long-term in a dead environment, also can not function properly. Therefore, the management must formulate a system to open the bottom of the fire hose connected to the bottom of the drain valve for sewage, completely exclude the second half of the ring of sediment pollution; set in the spray system for the district to detect the drain valve, the same rotation to rotate the water section. The cycle is generally 3 months is appropriate, only the scientific management of high-rise building fire network in order to make the fire function to play an effective guarantee. ? 3 and the high-rise building fire water supply system related to the basic management requirements? (1) The current high-rise building fire water storage commonly used and living water in the same tank, but domestic water in the upper part of the storage tank, fire water in the bottom of the storage tank. Instead of the fire water storage through the water tank siphon life to make full-scale water pipes to achieve cleaning effect. By the proliferation of microbial water bodies and metal pipe immersed in water corrosion, high siphon, low siphon hole is easy to plug. When the siphon hole is blocked, while the domestic water supply temporarily in short supply, the fire water will be cis cited, can not guarantee its storage. In case of any event, the consequences could be disastrous. So do not ignore the management of siphon hole detection dredge work. The solution is to use a custom small iron drill to remove the scour and corrosion of the orifice. This not only ensures that the fire water is not dead water, drinking water from pollution, but also to ensure that the fire reserve water. (2) For the single-flow valve in the fire network, especially the first single-flow valve connected to the ring network of the fire water pipe in the roof water tank, it is easy to get stuck, and there are many cases of plastic bags, It is important to check the functioning of an event. The application of pressure relief orifice or throttle fire system, also pay close attention to its maintenance work. (3) Check the fire pump power supply and work conditions, testing fire reserve power switch switching system to determine its working status, technical performance is normal. In the fire system management testing, multiple fire pump electromechanical equipment (testing, safety, display, signal, etc.