However, building resource-saving, energy-saving and environmentally friendly casting enterprises is a major and urgent issue facing the entire industry. After testing by industry professionals, the Hunan vector frequency conversion water supply equipment industry has continuously absorbed advanced foreign technologies, summarized its own level, and has basically solved the problems of substandard product quality and serious environmental pollution caused by the foundry industry. This is mainly an improvement and innovation in casting equipment. Industry technicians have stated that the theme should be scientific development and the main focus should be on transforming the development mode. In the next five years, we need to achieve scientific development in the manufacturing industry of vector variable frequency water supply equipment, strictly control the addition of new production capacity, and accelerate the elimination of outdated production capacity. Strictly implement industrial policies and no longer blindly follow the trend, rushing forward, setting up stalls, launching projects, and expanding production capacity. The person in charge of the enterprise should conduct in-depth research on the market and the actual situation of the enterprise, and do a good job in the preliminary planning and demonstration work. They should not only maintain a stable growth rate, but also pay attention to enhancing endogenous power, the connotation of growth, the quality and efficiency of development, green and harmonious development, and social responsibility. Avoid duplicate construction and blind investment. Local economic authorities and industry associations should take on supervisory responsibilities, actively promote joint restructuring of enterprises, encourage the extension of industrial chains, and form new economic growth points.

Introduction to Vector Variable Frequency Water Supply Equipment
Vector frequency conversion water supply equipment is a complete set of water supply equipment that is directly connected to the municipal pipeline network without affecting it. On the basis of variable frequency constant pressure water supply, this device superimposes the pressure of the municipal pipeline network and the pressure of the lifting water pump, making domestic water supply more energy-efficient and environmentally friendly. It is an ideal replacement product for traditional secondary water supply. The equipment consists of a frequency conversion control cabinet, a non negative pressure device, an automation control system and remote monitoring system, a water pump unit, a voltage regulator compensator, a negative pressure eliminator, pressure sensors, valves, instruments, and piping systems.

The vector frequency conversion water supply equipment automatically changes the number and operating speed of water pumps based on the instantaneous pressure and flow parameters in the water supply network, achieving closed-loop regulation of constant pressure variable water supply, thereby improving the quality, efficiency, and energy saving of the company.

At present, vector frequency conversion water supply equipment is used for production, living, and office water in enterprises, residential areas, and rural areas. There are 20-2000 water supply households. The daily water supply is between 20-50000m3, and the water supply height reaches 150 meters, which is a 50 story building.



Principle of Vector Variable Frequency Water Supply Equipment
The basic working principle of vector frequency conversion water supply equipment is to automatically adjust the number of running water pumps and the speed of one water pump according to changes in user water consumption, so as to maintain a constant outlet pressure of the water pump. When the user's water consumption is less than the output of one water pump, the system operates a water pump with variable frequency speed regulation according to the change in water consumption. When the water consumption increases, the pressure in the pipeline system decreases. At this time, the pressure sensor sends the detected signal to the microcomputer control unit, which judges and sends instructions to the frequency converter to control the water pump motor to increase the speed to ensure constant system pressure. Conversely, when the water consumption decreases, the water pump speed slows down to maintain constant pressure. When the water consumption exceeds the output of one pump, the first pump switches to power frequency operation, and the second pump starts variable frequency speed regulation operation. When the water consumption is less than the output of two pumps, one or both pumps can automatically stop running. Throughout the entire operation process, the system maintains a constant pressure, ensuring that the water pump operates at a high efficiency zone. This not only guarantees constant pressure water supply for users but also saves energy. The equipment does not require dedicated operators.


Characteristics of Vector Variable Frequency Water Supply Equipment
1. Significant economic benefits: By using Zhongying vector frequency conversion water supply equipment, it is possible to avoid building water towers or rooftop water tanks, which not only reduces the construction period of the project, but also solves the disadvantages of high project cost and overcomes the shortcomings of large air pressure fluctuations and frequent pump start-up.

2. Rigorous design: Zhongying Vector Variable Frequency Water Supply Equipment adopts water pump variable frequency constant pressure control, which can keep the outlet pressure of the pipeline constant no matter how the system water consumption changes.

3. Reliable operation: The equipment adopts a frequency converter and a well-known domestic brand water pump, with protection function and automatic/manual conversion function, making the operation very reliable. And it has good performance, flexible control mode, and strong anti-interference ability

4. Energy saving: Zhongying Vector Variable Frequency Water Supply Equipment can adjust the speed of the water pump according to the changes in the user's water consumption, so that the water pump always works in the high-efficiency zone, and the energy-saving effect is obvious, which can save 35% of electricity compared to constant speed water pumps.

5. Easy to operate: Zhongying Vector Variable Frequency Water Supply Equipment adopts fully automatic control, PID regulation, keyboard operation, and human-machine interface (text, number) display. Operators only need to switch the electrical control cabinet switch to achieve the desired operating conditions for users, achieving fully automatic unmanned operation.

6. Complete protection functions: It has automatic protection functions such as overload, short circuit, overvoltage, undervoltage, phase loss, overcurrent, short circuit, and water shortage. Can perform signal alarm, self check, fault diagnosis, etc. in abnormal situations.

7. Small footprint and easy installation: The entire equipment only has one set of water supply control cabinet and water pump unit, making installation very simple and convenient.

8. Extending the service life of water pumps and motors: It can reliably achieve soft start for multiple pump units, avoiding impact on the power grid and pipeline network, and rotating alternately, greatly extending the service life of water pumps and motors.

Scope of application of vector frequency conversion water supply equipment
1. High rise buildings with water pools, hotels, schools, urban residential areas, enterprises and institutions, and rural living water for new rural construction.
2. Domestic or production water for factories, industrial and mining enterprises.
3. Various types of water plants, water supply stations, sewage and wastewater treatment plants, agricultural irrigation and drainage stations, etc.
4. Centralized hot water supply for high-rise buildings, residential areas, and enterprises and institutions. 
5. Pressurization of cooling water and circulating water in production and daily life. 
6. Constant pressure oil transportation in oil field pipelines, oil depots, gas stations, etc.