Qingyuan secondary water supply equipment Water Equipment Co. Walter Merchants national agency, secondary water supply equipment sailing toward the field of secondary water supply equipment Fairview Overview: secondary water supply equipment can be equipped with special inverter constant pressure water supply, and make use of fuzzy control theory system more reasonable. In addition the device is equipped with "automatic", "manual" switch for users to choose; extend the life of pumps and motors, water hammer phenomenon, motor soft-start frequency; prolong the life of the pipeline, when not in the water or water compared By small, reducing the pressure in the pipe, so that the pipe network is not easy to break, greatly saving pipeline maintenance costs; canceled the high towers or tanks, pressure tank. On the one hand to solve the problem of secondary pollution of water, on the other hand they are saving building construction costs; energy-saving is generally up to about 30%. Because water consumption is changing with time, while the ZBH constant pressure water supply equipment according to changes in water, automatically change the pump speed or decrease pump bench reached constant pressure water supply, energy-saving purposes; automation and control, to overcome the artificial Control may bring misuse, while significantly reducing labor intensity and manipulate numbers, and remote manipulation and remote monitoring; fully functional. There are many protection functions: overload, overheating, overvoltage, undervoltage, overcurrent, phase loss. Has a variety of working conditions indicators. Secondary water supply equipment characteristics: a, automatic isolation valves or throttling device (optional): used to isolate municipal water, can be arbitrarily set operating pressure, when the municipal water pressure is lower than this value, the isolation device operation, switching Confined to a water tank or pool water. Also consider using inexpensive throttling device instead of the isolation valve, limiting the maximum water flow, inadequate water supply compensated in part by the water tank. b, water tank: Water runs all the volume is filled with water tank, because no compressed air energy storage, buffering effect of various shocks and dynamic compensation of municipal water as effective as a buffer tank. But when the municipal water pressure is too low, the water tank effluent (water) is greater than the amount of water, water storage tank volume can all be used to compensate for the lack of municipal water. During the water tank to provide compensation for the amount of water the air by vacuum suppressor automatically enters the tank, to avoid causing negative pressure to compete with suction pipe network (the so-called no vacuum suction). Water tank can be used in series with the water line. c, pressure tank: generally reinforced concrete structure, with water tank to work on the same principle, because of the large volume of municipal water supply has a good load shifting role for a variety of municipal water situation throughout the country. When the municipal water supply network for any reason during the pool without water pressure provided by a certain time of water supply sources for customers that require high reliability of water supply applications. d, pump unit: selection of the company has a non-overloading characteristics of pumps, which can be adapted to the pressure change operating characteristics over a wide range of municipal water, and does not produce overload. e, pressure tank: its role and usually twice a pressurized water supply equipment in the pressure tank the same standard product design using miniature diaphragm pressure tank, the main advantage of its packing function, automatic energy-saving equipment in favor of intelligent control. f, frequency control cabinet: a choice of full conversion technology solutions that all pumps are used frequency drag, but also be part of the inverter technology program (only one pump for frequency control drag). g, a bypass line: If the municipal water supply gas to meet the usual requirements, only the peak pressure in the water supply shortage, loadable bypass pipe so that the municipal water and pressurized water directly automatic switching operation. When non-fire state, the use of TH-F series automatic inspection of water supply equipment, complete sets of automatic fire control equipment consisting of inspection, fire pumps can do automatic inspection operation. Automatic inspection cycle for a few hours to several hundred hours, optionally, the clock cycle starts automatically with manual inspection procedures and inspection functions. Digital intelligent fire patrol inspection of fire control cabinet controller will detect the main circuit after confirming normal, one by one driven fire pump to make low-speed operation, when the drive power is very small, about the percentage of the pump motor power rating about one, so significant energy saving. Due to the low speed, so it will not pressurized water supply pipe network. Frequency application mode is usually secondary water supply facilities in the same way water supply system, set up more than one common pump, several large water pump full of water supply to open one or two hours. When using frequency control for constant pressure water supply, use two ways, one is all the water pump with an inverter; Second, each pump is equipped with a converter. The latter method based on feedback from the pressure signal, automatically adjust the output frequency through the PID operation, change the motor speed, and ultimately achieve the purpose of the pipe network constant pressure on a closed loop, is relatively simple, but the high cost. The former method is low cost, poor performance than the latter, but more complex control procedures, is the future direction of development. The principle mentioned below are a multi-motor drive system drag. Secondary water supply equipment frequency control principle with frequency control to achieve constant pressure water supply, and with regulating valve to achieve constant pressure water supply compared to energy-saving effect is very significant (can be calculated depending on the circumstances). Its advantages are: 1, the starting balance, starting current limit within the rated current, thus avoiding the impact on the grid at the start; 2, the average pump speed is reduced, thereby prolonging the life of pumps and valves; 3 can eliminate water hammer effect starting and stopping time; secondary water supply equipment 1, saving: optimization of energy-saving control software that enables the pump to achieve maximum energy saving operation 2, water: set according to the actual situation of water pressure in the pipe Automatic pump out the water, reducing water run, drain phenomenon; 3, reliable: the drive to achieve a soft start pump, the pump power frequency conversion without the impact of the switch to prevent the pipe network impact, avoid tube network pressure gauge, pipe rupture. 4, networking capabilities: full Chinese control configuration software, real-time monitoring of each site, such as motor voltage, current, frequency, pipe network pressure and flow. And can accumulate electricity at each site, cumulative for each pump out the water, while providing various forms of print statements in order to analyze the statistics. 5, flexible control: segmentation water, regular water supply, manually select the work. 6, self-protection function: If a pump fails, take the initiative to the upper machine alarm information, and start the standby pump to maintain water balance. In case of failure of the automatic control system, users can directly manipulate the manual system to protect the water supply. Applications a secondary water supply equipment, waterworks, pressure pump 2, 3, 4 production water, boiler circulating water system 5, characterized by secondary water irrigation system equipment residential areas, hotels and other buildings 1. Energy can achieve saving 20% ??-40%, to achieve green electricity. 2. Small footprint, low investment and high efficiency. 3. flexible configuration, high degree of automation, functional, flexible and reliable. 4. Run reasonable, because it is soft start and soft stop, not only can eliminate water hammer effect, and the average torque of the motor shaft and wear reduction, reducing the amount of maintenance and repair costs, and greatly improve the life of the pump. 5. Because ZBH constant pressure water supply directly from the governor to reduce the secondary pollution of the original water supply to prevent the infection source of many infectious diseases. 6. communication control, can achieve unattended, saving manpower and resources.