Changshu conversion water supply equipment, first-class quality, reliable, reputation first, your best choice. Tenacity is a major factor of success, just knock on the door long enough and loud enough, would eventually pull wake. Water supply equipment consists of: 1, frequency conversion water supply equipment working pump, commonly used single-stage or multi-level horizontal or vertical centrifugal pump water. Conversion water supply equipment pump and pressure tank: in a small flow or zero flow duration is longer, is more power-saving settings. 3, frequency conversion water supply equipment, frequency conversion control cabinet: frequency control cabinet is a core part of the frequency conversion water supply equipment, generally supporting the supply of the pump power supply manufacturers. 4, conversion water supply equipment accessories: including connecting pipes and valves, check valves, safety valves a small pressure tank, pressure gauge, pressure relay and the base. The general assembly equipment assembled by the manufacturer supplier. Conversion water supply equipment application areas: 1, water plant and water in pressurized systems, residential areas, high-rise buildings, hotels and restaurants production, domestic water supply 3, garden lawn water-saving drip irrigation, water supply, industrial production constant pressure the upgrading of the water supply system (printing and dyeing, textile, chemicals, beverages, smelting), old-fashioned high water tank and water tower water supply system conversion water supply equipment Product Overview: conversion water supply equipment by computer-controlled frequency control to achieve constant pressure water supply. First set the working pressure of the water points, and to monitor the municipal pipe network pressure, low pressure automatically adjust the pump speed to increase pressure and to control the pump at a constant speed operation, constant pressure water supply. Speed ??is increased when the water increases, the speed is reduced when water was reduced, always ensure that the water pressure constant. Conversion water supply equipment performance characteristics, and municipal pipe network directly connected, do not build pools. 2, small size, small footprint, easy installation. 3, water tank, pump all stainless steel, no secondary pollution of water. 4, the water pressure is stable and will not cause adjacent the user pipe network pressure fluctuations. 5, automatic operation, unattended. 6, the protection function, automatic fault display and alarm. 7, make full use of the original water pressure, much difference how much energy efficient. 8, when the municipal pipe network pressure, the device is in shutdown state, municipal water to the water tank through the bypass line directly to the water supply pipe network users. 9, when the municipal pipe network voltage, the device automatically start, on the basis of the original water pressure pump frequency control pressurized water supply water supply equipment works: water supply equipment put into use, the water pipe network of water into the water supply tank, The air in the tank from the vacuum to eliminate the exclusion, to be filled with water, remove the vacuum automatically turns off. When the water pipe network pressure to meet the water requirements, the system consists of the bypass valve from the water pipe network water supply; when the water pipe network pressure can not meet the demand for water system pressure signal from the remote gauge feedback to the inverter controller, pump operation, and in accordance with the size of water automatically adjust the speed constant pressure water supply, if the operation of the pump frequency speed, start another pump frequency operation. Pump water, if the water pipe network of water is greater than the pump flow to maintain normal water supply; peak water, if the water pipe network of water is less than the pump flow, the water supply tank water as a supplemental source of water supply still normal, vacuum to eliminate air into the water supply tank, vacuum tank was destroyed to ensure that the water pipe network does not produce negative pressure water peak after the system has returned to normal water supply conditions. When the water pipe network without water, resulting in declining water supply tank level, the level detector signal is fed to the inverter controller, the pump automatically shut down to protect the water pump, water tank can store and release energy, avoid frequent pump start. Conversion water supply equipment technical parameters: flow range :6-300m3 / h Lift range :30-200m Working pressure: ≤ 2.0MPa scope of application: HWG no negative pressure water supply equipment suitable for any lack of water pressure in the area of ??pressurized water supply. ■ new residential or office buildings for domestic use. ■ Low water pressure can meet the requirements of the fire with water. ■ transformation of the original pressure water supply equipment. ■ You must build the pool, you can no negative pressure equipment and pool shared water supply, further energy saving. ■ a large water plant water booster pumping station. ■ industrial and mining production and living water. ■ circulating water system. Frequency conversion water supply equipment, frequency control characteristics and analysis of water users the number is constantly changing, so the water supply shortage or surplus have occurred. And the imbalance between the supply of water and concentrated reflection in the water supply pressure, ie less water than the water pressure is low; less water and more water, the pressure. To maintain a constant water pressure, can maintain a balance between water supply and use that water for a long time water supply, the water came from a water supply less, thus improving the quality of the water supply. The frequency of water supply equipment is very important for certain industries or particular user. In some production process, for example, if the pressure of the water supply for any reason or without water for a short period of time, which may affect product quality, severe damage to the product end-of-life and damage to the equipment. Another example is the case of a fire, or if insufficient water pressure or water supply, can not be rapid fire, may cause significant economic losses and casualties. Therefore, some of the water area using constant pressure water supply equipment, have greater economic and social significance. With the development of power technology, frequency control technology is improving, the frequency control core of the intelligent constant pressure water supply equipment to replace the previous high water tank and pressure tank water supply equipment, a smooth start and starting current limit at rated current less, thus avoiding the impact of the starting grid; eliminates the average pump speed is reduced, and thus prolong the service life of pumps and valves and other things; starting and stopping the water hammer effect. The stable and secure running performance, simple and convenient operation, as well as a full array of features, will supply water-saving, energy-saving, save manpower, and ultimately achieve the purpose of efficient operation. Conversion water supply equipment conversion applications usually in the same way water supply system, set up more than one common pump, pump full supply large amount of water supply to open one or two hours. Constant pressure water supply equipment constant pressure water supply, in two ways, one is all pump equipped with a frequency converter; Second, each pump is equipped with a converter. The latter method based on pressure feedback signal, the PID operation automatically adjusting the output frequency to change the motor speed, and ultimately achieve the purpose of the pipe network constant pressure on a closed loop, is relatively simple, but the cost is high. The former method is low cost, poor performance than the latter, but more complex control procedures, the future direction of development, my company developed NKL-A series frequency conversion constant pressure water supply equipment system can achieve an inverter control function of the number of any motor. The principle mentioned below are an inverter drag multi-motor system. 3, frequency conversion water supply equipment PID control principle according to the feedback principle: in order to maintain a physical change or essentially the same, it should lead the physical constant comparison to form a closed-loop system. In order to maintain a constant pressure, so it is necessary to introduce water pressure feedback value compared with the given value, so as to form a closed loop system. However, the characteristics of the system being controlled is nonlinear, large inertia of the system, a combination of methods of control and PID, pressure fluctuations in the use of fuzzy control, in order to speed up response; when using PID in the pressure range of small to maintain the static accuracy. This smart meter can be added by the PLC when the algorithm is to switch between the pump at the same time the PLC is programmed to the frequency and frequency. Practice has proved that this method is feasible, and cost is not high. Constant pressure water supply equipment in order to maintain the same pressure of the water supply network, based on feedback theorem pressure transmitter is installed in the pipe network system management as the feedback element, pressurized water supply system pipe length, large diameter pipe network are slow, so the system is a big lag system, not easy to directly PID regulator control, while the use of PLC in a controlled manner to achieve the regulatory role of the control system. 4, frequency conversion water supply equipment, frequency conversion control principle with frequency control to achieve constant pressure water supply, and adjust the valve to achieve constant pressure water supply, energy saving effect is very significant (calculated) on a case-by-case basis. Its advantages are: a, the starting balance and limit the starting current less than rated current, thus avoiding the impact of the starting grid; b, the average pump speed is reduced, and thus prolong the service life of pumps and valves; c can be eliminated starting and stopping the water hammer effect; Generally speaking, when an electric motor controlled by a frequency converter, just the inverter equipped with a motor capacity and motor capacity can match. When an inverter to control two motors, in principle, the inverter is equipped with a motor capacity should be equal to the combined capacity of the two electric motors. Such as water consumption during peak load capacity than the two pumps at full speed supply amount of a lot of difference can be considered appropriate to reduce the capacity of the inverter, it should be noted there is adequate capacity. Although the pump at low speed, the motor current is smaller. However, when the user changes the water frequently, the motor will be in frequent up and spin-down state, and l, the deceleration of the current is slightly more than the rated current of the motor, causing the motor to overheat. Therefore, the motor thermal protection is required. Accumulated temperature rise of the rise due to frequent acceleration and deceleration, the inverter electronic thermal protection function is difficult to play a protective role, it should be a thermal relay for motor thermal protection. In the main function preset maximum frequency to the motor rated frequency converter has a maximum operating frequency. The deceleration time in the case of the PID controller or spin-down time should be set too short, so as not to affect the dynamic response of the process is determined by the PID regulator. If the drive itself has a PID regulator, as long as the pre-set the PID function, the set-up and spin-down time will automatically lapse. Website: http://www.huadugs.com