1、 Product Introduction:

The pressure stabilizing water supply equipment is a complete set of water supply equipment developed by our company's professional technicians on the basis of pneumatic water supply equipment, which can be directly connected to the tap water pipe network and does not have any negative effect on the tap water pipe network. It can replace reservoirs and provide direct or indirect water supply, forming a continuous and closed relay boosting water supply method.

Characteristics of water supply equipment:

1. No need to build high-level water tanks, ground (underground) water tanks - clean, hygienic, efficient, energy-saving, and cost-effective

The direct connected non negative pressure water supply equipment is economical and hygienic, fully utilizes the pressure potential energy of the municipal water source itself, and maximizes the energy-saving effect of variable frequency speed regulation. Practice has proven that using direct connected non negative pressure water supply equipment can save more than 50% of the construction cost of water tanks, and compared with other water supply equipment, can save 20% -40% of electricity.

2. Low operating noise

Adopting variable frequency speed regulation operation, especially using a full frequency control system, most of the time, especially at night, it operates at low speed and low noise.

3. The use of fully enclosed diaphragm tanks with buffering and dynamic compensation functions is more practical than ordinary non negative pressure water supply equipment currently on the market. And the control system is simplified.

4. The product is advanced, reliable in quality, highly standardized, and has strong adaptability.

Adopting standardized and universal control system technology solutions, key components in the product, such as motors, water pump bearings, frequency converters, regulators PLC、 International and domestic brands are used for other components, and corresponding parts from any manufacturer can be replaced, making debugging and maintenance convenient.

5. Fully functional, highly intelligent, and adaptable

Advanced frequency conversion control technology, soft start, overload, short circuit, overvoltage, undervoltage, phase loss, overheating, and stall protection are adopted. In abnormal situations, it can perform signal alarms, self checks, fault diagnosis, etc., and can also automatically adjust the water supply flow according to the high or low water consumption. When the frequency converter fails, it automatically degrades operation (becoming a power frequency automatic water supply equipment), and when the automatic system fails, it can also manually operate the emergency backup to win maintenance time.

6. Personalized design, long lifespan

If the user needs it, devices and installation forms that meet the user's required parameters can be designed.

Various communication interfaces and protocols can be selected according to requirements, so as to connect various human-machine interfaces, monitoring computers, and connect with various control networks and communication networks, suitable for special and complex operation control and network monitoring requirements. We can develop supporting monitoring software for users.

2、 Schematic diagram of water supply system

1) When starting up in automatic mode, the pressure P1 of the tap water is lower than the set pressure P2 required by the user. The control system automatically controls the variable frequency operation of the 1 # water pump to utilize municipal pressure resources to stack and supply water until the actual pressure PA of the user's pipeline network is higher, and the speed of the variable frequency pump is lower. The lower the pressure P1 of the tap water, the higher the speed of the variable frequency pump. When the pressure reaches the upper limit and exceeds the delay time, the frequency converter will start sleep mode. When the pressure drops to the wake-up value, the water pump will automatically wake up.

2) If the first pump reaches the upper frequency limit but still cannot meet the water demand, and there is a delay of several seconds, the system will automatically start the second pump. The starting process is as follows: ① The first variable frequency pump is converted to the power frequency; ② Variable frequency start the second pump; ③ Judging the pressure, if the pressure still cannot reach the set value of the user's pipeline network pressure at this time, the current variable frequency pump will switch to power frequency and continue to start the next water pump with variable frequency until the user's pipeline network pressure reaches the set value.

3) If the outlet pressure reaches the upper pressure limit and exceeds the delay time, the system will automatically reduce the pump. This system adopts the method of directly stopping the power frequency. If the pressure is still high, the next water pump will continue to be stopped until the user's pipeline reaches the set pressure value.

4) There are two or more water pumps in the system (including two). If one pump is running and fully meets the water requirements, the system will rotate the use of the water pump at regular intervals of 4 hours (users can enable or disable the scheduled pump replacement function as needed and set the switching time range from 2 minutes to 24 hours). If one of the water pumps cannot meet the water requirements and the system needs to add or reduce pumps, it will be used in a sequential manner, with first adding and then stopping, and then adding and then stopping.

5) The working mode of the small pump: If the pipeline pressure reaches the upper limit and all the power frequency main pumps exit, the frequency converter will sleep and maintain for tens of seconds. When the pipeline pressure drops to the lower limit of the small pump, the small pump will be started to supplement the pressure. When the pressure reaches the upper limit, the small pump will stop; If the small pump cannot meet the requirements for pressure compensation and the pressure continues to decrease, when it reaches the wake-up value of the frequency converter, the main pump will be operated by the frequency converter and the small pump will exit.

6) This system has thermal relay protection and fault switching functions, striving to ensure uninterrupted water supply for users and stable pressure in the outlet pipe network. The protection value of the thermal relay is set to 1.1ln (ln=rated current of the water pump motor).

7) When the system pressure is insufficient or a large flow rate is generated instantaneously, the vacuum suppression system starts working to ensure that the system does not generate vacuum and negative pressure. When the municipal water supply is cut off, it automatically maintains pressure through a non negative pressure tank, and the holding time is determined by the frequency of operation. The higher the output frequency, the shorter the holding time.

8) The system outlet is equipped with an overpressure detection device. When the water pressure exceeds the overpressure protection set value, the system automatically stops all water pumps until the water pressure drops below the protection value and the system automatically restarts.