Working principle of series high-rise constant pressure water supply equipment Performance characteristics of series high-rise constant pressure water supply equipment for water tanks in Zhongying Pipe Network Site map of Zhongying pipe network water tank series high-level constant pressure water supply equipment Picture of Zhongying Water Supply Company
Pipe network water tank series high-level constant pressure water supply equipment
Pipe network water tank series high-level constant pressure water supply equipment is a new type of water supply equipment combining frequency conversion technology, microcomputer technology and motor control technology; this pipe network water tank series high-level constant pressure water supply equipment is an ideal product to replace high-level water tanks and water towers. ; It is the development and supplement of air pressure water supply equipment. The device consists of a programmable controller, a variable frequency governor, a control circuit, and a motor pump to form a closed-loop water supply control system, which can fully meet the constant pressure in the water supply system's pipe network. Make the entire water supply system always maintain the best operating state of high efficiency and energy saving. Variable frequency speed regulating constant pressure water supply equipment includes domestic water supply, dual-purpose water supply for domestic fire protection, and constant pressure water supply systems.
The pipe network water tank tandem high-rise constant pressure water supply equipment is a new type of automatic water supply equipment that supplies water on demand while keeping the water supply pressure constant (ideal state). The frequency of the power supply is directly proportional to the speed of the water pump, and the speed of the water pump is directly proportional to the amount of water supplied. The variable frequency speed control cabinet controls the speed of the water pump by changing the frequency of the power supply of the water pump, thereby adjusting the amount of water supplied by the water pump. purpose. The frequency conversion speed control cabinet collects the water supply pressure of the user's pipe network through pressure sensors and performs PID calculations, so that the water supply pressure of the user's pipe network is always stable within a certain range of the set pressure. This is the principle of variable frequency speed control constant pressure water supply.
Features of Pipeline Water Tank Series High-rise Constant Pressure Water Supply Equipment
The equipment can automatically detect according to the actual water consumption and the use pressure of the user, and adjust the speed (power consumption) of the motor to keep the equipment in a highly efficient working state.
Water supply network pressure is stable
The pipe network water tank series high-level constant pressure water supply equipment is controlled by a microcomputer to automatically close the loop. It can restore the changing pressure to normal within 0.5 seconds, and the pressure adjustment accuracy is ± 5% of the set value.
Small footprint, low investment, short installation period
Compared with other old-fashioned water supply equipment, the equipment occupies 3 to 16 times less land and 15% to 60% less investment than building water towers. The equipment is small in size, convenient to assemble, install and debug, and has a short period of transportation and installation.
Full protection functions, safe and reliable operation, and easy operation
The host of the pipe network water tank series high-level constant pressure water supply equipment adopts imported frequency converter governor. It has protection functions such as undervoltage, overvoltage, overcurrent, overload, short circuit, overheating, and stall prevention. It can be used for more than 100,000 hours without failure. The power distribution control part of the equipment adopts the intelligent control principle, which is convenient and practical, and the working conditions of the equipment are clear at a glance, which is convenient for non-professionals to quickly master.
Full water supply function and high insurance coefficient
In case of partial failure of the equipment, the emergency function can be enabled to continue supplying water. Zhongying equipment can be automatically connected to the municipal water supply network and has dual constant pressure functions, that is, it can meet the normal pressure and flow of domestic production water. It can automatically switch to high-pressure large-flow water supply in the event of fire. Multipurpose.
Parameters of Zhongying Pipe Network Water Tank Series High-rise Constant Pressure Water Supply Equipment
Power range: 1.8-3000kW
Power supply voltage: 380/400/415/440/460/480 / 500VAC 3 phases ± 10%;
Power frequency: 35-50Hz
Control connection: 2 programmable analog inputs (AI); 1 programmable analog output (AO); 5 programmable digital inputs (DI); 2 programmable digital outputs (DO).
Continuous load capacity: 150% In, 1 minute allowed every 10 minutes
Serial communication capability: The standard RS-485 interface enables the inverter to be easily connected to a computer.
Protection features: overcurrent protection, I2t, overvoltage protection, undervoltage protection, overheating protection, short circuit protection, grounding protection, undervoltage buffering, motor under / overload protection, stall protection, serial communication fault protection, AI signal loss protection Wait. Parameter setting of series high-rise constant pressure water supply equipment for water tank in Zhongying pipe network Working principle of series high-rise constant pressure water supply equipment for pipe network water tank
Principles of series high-rise constant pressure water supply equipment for pipe network water tanks
Pipe network water tank tandem high-level constant pressure water supply equipment takes the pipe network water pressure (or user water flow) as the setting parameter, and controls the output frequency of the inverter through a microcomputer to automatically adjust the speed of the pump motor to achieve closed-loop adjustment of the pipe network water pressure. (PID), to make the water supply system automatically and constantly stable at the set pressure value: that is, when the water consumption increases, the frequency increases, the speed of the pump increases, and the water supply increases accordingly; when the water consumption decreases, the frequency decreases, and the speed of the water pump decreases. The amount of water supply is correspondingly reduced, which ensures the water supply efficiency. The user's requirements for water pressure and water volume, and at the same time achieves the purpose of improving the quality and efficiency of water supply, "how much water is used, how much water"; the use of this equipment does not require The high-level water tank, water tower, and water have no secondary pollution. It is an ideal modern building water supply equipment.
Compared with the use of regulating valves to achieve constant pressure water supply, the use of pipe network water tanks in series high-level constant pressure water supply equipment to achieve constant pressure water supply is very significant (can be calculated according to specific conditions). Its advantages are:
1. Starting balance, the starting current can be limited to the rated current, thereby avoiding the impact on the power grid during starting;
2. As the average speed of the pump is reduced, the service life of the pump and valves can be extended;
3. It can eliminate the water hammer effect during starting and stopping;
Generally speaking, when a motor is controlled by an inverter, it is only necessary to match the capacity of the inverter with the actual motor capacity. When one inverter controls two motors at the same time, in principle, the capacity of the matched motor of the inverter should be equal to the sum of the capacities of the two motors. However, if the water consumption at the peak load is much different than the full-speed water supply of the two pumps, you can consider appropriately reducing the capacity of the inverter, but you should pay attention to leaving enough capacity.
Although the pump is running at low speed, the working current of the motor is small. However, when the user's water consumption changes frequently, the motor will be in a state of frequent rise and fall, and the current of the rise and fall may slightly exceed the rated current of the motor, causing the motor to overheat. Therefore, thermal protection of the motor is necessary. The electronic thermal protection function in the inverter is difficult to protect the temperature rise accumulated due to frequent rises and falls, so a thermal relay should be used to perform thermal protection of the motor.
In terms of main function presets, the maximum frequency should be the rated frequency of the motor as the maximum operating frequency of the inverter. In the case of using a PID regulator, the time for raising and lowering speed should be set as short as possible to avoid affecting the dynamic response process determined by the PID regulator. If the inverter has PID adjustment function, as long as the PID function is set to be valid during the preset, the set speed-up and speed-down time will be automatically invalidated.
▲ Features and characteristics of series high-rise constant pressure water supply equipment
1.Solve the problem of low water pressure: The pipe network water tank is connected in series without tower constant pressure water supply equipment to make the water supply in the entire building maintain a constant pressure.
2. Avoid using roof water tanks:
Replace the traditional roof water tank or pool water supply method, eliminate the source of water pollution.
3.Reduce construction cost and increase space area:
The elimination of the traditional roof water tank or pool makes the building less stressed, simple in structure and reduced in cost.
4.Save energy and reduce floor space:
It saves more than 30% of energy than general water supply equipment. The equipment covers a small area, has a simple structure, and shortens the construction period.
5.High-quality intelligent computer control:
Dedicated self-developed, with a variety of functions can provide cutting-edge precision control, has reached the domestic leading level.
According to the required water consumption, the system can automatically adjust the speed of the pump and the number of pumps running, which greatly saves power and increases the service life of the pump.
7. Maintain a constant pressure:
Under drastic changes in water consumption, the outlet pressure can be kept stable, providing users with a comfortable water environment.
8.Good quality material composition:
The pump and its valve accessories are made of stainless steel to increase its service life.
Design products according to customer needs without wasting customer resources