Overview of knowledge of variable frequency non-negative pressure water supply equipment Non-negative pressure water supply equipment is a new type of water supply developed on the basis of the traditional variable frequency constant pressure water supply system. It is not a simple combination of water pump, pipe valve, tank and control cabinet. It is a high-tech product integrating mechanical, electronic, information and self-control technology. The non-negative pressure water supply equipment is a secondary water supply equipment that directly connects with the water pipe network and does not have any side effects on the water pipe network. Development and extension of water supply equipment. Pvc Roof Tiles,Plastic Roof Tiles,Synthetic Roof Tiles,Synthetic Glazed Roof Tile Shandong Gaoxin Chemical Co.,Ltd , http://www.gaoxinchem.com
First, the principle of frequency conversion without negative pressure water supply equipment
The water in the water pipe network directly enters the regulating tank, and the air in the tank is discharged from the vacuum eliminator. When the water is full, the vacuum eliminator is automatically closed. When the tap water can meet the water pressure and water demand, the equipment directly supplies water to the water pipe network through the bypass check valve; when the pressure of the water pipe network can not meet the water demand, the system passes the pressure sensor (or pressure controller, electric contact pressure) Table) gives the pump signal to start the pump operation. When the water pump supplies water, if the water volume of the water pipe network is greater than the water pump flow rate, the system maintains normal water supply; if the water supply volume of the water pipe network is less than the water pump flow rate during the peak water supply period, the water in the tank can be adjusted to supply water as a supplementary water source. The air enters the regulating tank by the vacuum eliminator, eliminating the negative pressure of the water pipe network. After the peak period of water consumption, the system returns to the normal state.
According to the principle of achieving no negative pressure function, it can be roughly divided into the following forms:
1. Steady flow compensator and vacuum suppressor control mode When the municipal pipe network supply is insufficient or the user water consumption is greater than the supply capacity of the municipal pipe network, the vacuum suppressor is opened, and the air enters the steady flow compensator, so that the originally closed compensator becomes In order to cut off the water tank, the negative pressure is generated, and the liquid level control is set in the steady flow compensator. When the flow is lower than the low position, the water pump stops working.
2. Self-controlled current limiting mode When the water supply of the municipal pipe network is insufficient or the water consumption of the user is greater than the supply capacity of the municipal pipe network, the feedback of the pressure sensing signal is adopted to limit the frequency converter so that the water pump does not overtake water, and when the water is supplied by the municipal pipe network When the requirements are met, the system returns to normal.
3. Pressure control point mode When the water supply of the municipal pipe network is insufficient or the water consumption of the user is greater than the supply capacity of the municipal pipe network, the flow rate constant pressure water supply pump is straightened up. After the water supply meets the requirements, the system returns to normal.
Second, the frequency conversion without negative pressure water supply equipment performance characteristics
1. It is easy to be integrated into the intelligent management system. The main components are made of high-quality components. The whole system has high reliability and anti-interference. Its standard serial communication port (RS485) makes communication between the system and the computer very convenient. .
2. The water level protection function, when the water level of the water tank is lower than the set water level, the system automatically stops the machine. The level controller performance is stable and reliable.
3, automatic reset function, the system automatically starts when the power is restored after power failure or when the water level is restored.
4. The fault pump shielding function, the fault pump directly exits the operation procedure after being shielded, and the standby pump takes over the work.
5. Automatic protection function: There are automatic protection functions such as overload, over current, short circuit, phase loss, over pressure, under voltage and water shortage.
6. The running noise is low. The non-negative pressure water supply equipment adopts the frequency conversion speed regulation operation, especially the full frequency conversion control system, and most of the time is especially in the low speed and low noise operation condition.
7, efficient and energy efficient. The equipment is connected in series on the municipal pipe network. The water supply variable frequency pump can make full use of the original municipal water pressure and pressurize according to the actual water supply pressure. When the water is low, the equipment will automatically enter the sleep state, and the power saving rate can reach 30. ~90%.
8, a small footprint. There is no need to build a tank and a water-filled box, and the facility occupies a small space. The vacated pool location can even be used as a parking space to increase revenue.
Third, the frequency range of non-negative pressure water supply equipment
The non-negative pressure water supply equipment is mainly used in the case of direct connection to the water pipe network, which can solve problems such as seepage, drowning, dripping, water leakage and secondary pollution, and can fully utilize the original pressure of the municipal pipe network, especially suitable for residential residents. Water for living in the building. The non-negative pressure water supply equipment can adopt various control modes such as water level, pressure and variable frequency speed regulation to meet the needs of different users, prevent secondary pollution of the reservoir, generate no negative pressure on the municipal pipe network during operation, and fully utilize the pressure of the municipal pipe network. Many advantages make the non-negative pressure water supply equipment a representative new generation of environmentally-friendly and energy-saving complete water supply equipment.
The non-negative pressure frequency conversion water supply equipment is mainly composed of a water pump unit, a pressure measuring regulator tank, a pressure sensor, a frequency conversion control cabinet, etc., and can always maintain the pressure gauge pressure equal to the user set value. Can be used for general living or production water supply. This equipment is a mechatronics high-tech energy-saving water supply device that combines the frequency converter and the motor water pump with the most advanced microcomputer control technology. The variable frequency constant pressure water supply equipment can be widely used in industrial, enterprise, living quarter production and domestic water. It can also be used for water supply such as hot water supply, constant pressure spray, cooling water and circulating water in various places, agricultural irrigation, garden spray, water and music fountain systems, water supply and fire protection systems for hotels and large buildings.
This article is from the official website of Sichuan Jiawei Water Supply Equipment Co., Ltd. More details can be found at:
Http://news.chinawj.com.cn Submission: