Introduction to manufacturers of non negative pressure variable frequency water supply equipment for pipeline network stacking and non negative pressure water supply equipment

Description :

Non negative pressure variable frequency water supply equipmentWorking principle:

　　1. The inlet pipe of the non negative pressure water supply equipment is directly connected to the tap water network. Water is pressurized into the inlet pipe of the equipment under the driving force of the residual pressure in the tap water network. The booster pump of the equipment continues to pressurize on the basis of the residual pressure of the inlet water, and increases the water supply pressure to the pressure required by the user before supplying water to the outlet pipe network;

　　2. When the user's water consumption is greater than the water supply of the tap water network, the pressure of the inlet pipe network decreases. When the pressure at the inlet of the equipment drops to less than 0, the negative pressure prevention and control device in the equipment automatically starts working to adjust the operating status of the equipment until it stops and is on standby, ensuring that the pressure of the inlet pipe network no longer decreases and does not have adverse effects on the tap water network;

　　3. When the water supply capacity of the tap water network is restored and the pressure of the inlet network is above the protection pressure, the equipment will automatically start and resume normal water supply; When the remaining pressure in the water supply network meets the user's water supply requirements, the equipment automatically enters a sleep state and is supplied directly to the user by the water supply network. When the water supply is insufficient, the equipment automatically resumes operation;

　　4. When the user does not use water or uses very little water, the non negative pressure water supply equipment automatically enters a shutdown sleep state. The small flow stabilizing and pressure maintaining tank located on the outlet side of the equipment maintains the user's water usage and pipe network leakage. When the user's water stabilizing and pressure maintaining tank cannot maintain the required pressure of the water supply pipe network, the equipment automatically wakes up and resumes normal operation. During the operation of the equipment, the remaining pressure of the tap water pipeline network is fully utilized, which not only does not have adverse effects on the tap water pipeline network, but also greatly meets the needs of users, reduces water supply energy consumption, and achieves optimal operation of the water supply system.

　　Introduction to Non negative Pressure Water Supply Equipment for Pipe Network Stacking

　　1. High degree of intelligence, simple operation, and labor-saving: The device is controlled by a fully automatic intelligent controller, which adjusts itself according to the user's water consumption and the tap water pressure in the pipeline network. And it adopts a human-machine interface (text, numbers) display, allowing customers to more intuitively see the operation status of the equipment.

　　2. Environmental hygiene: The equipment operates in a fully enclosed manner, completely eliminating secondary pollution of the water source.

　　3. Complete protection functions: It has perfect automatic protection functions for overload, short circuit, overvoltage, undervoltage, phase loss, overcurrent, water source shortage, etc. Can perform signal alarm, self check, fault diagnosis, etc. in abnormal situations.

　　4. Small footprint and easy installation: The entire equipment consists of only one set of water supply control cabinet, non negative pressure stabilizing tank, and water pump unit, making installation very simple and convenient.

　　5. Extend the service life of equipment: It can reliably achieve soft start for multiple pump units, avoiding impact on the power grid and pipeline network, and extending the service life of water pumps and motors.

　　Control principle of non negative pressure variable frequency water supply equipment

　　1. The equipment is linked with the fire control system, automatically entering the fire protection state in case of a fire alarm, and equipped with a linkage feedback interface.

　　2. The start-up of non negative pressure water supply equipment can be achieved through various methods such as direct power frequency start-up, self coupling voltage reduction start-up, Y-△ voltage reduction start-up, thyristor soft start control, frequency conversion constant pressure control, etc., to meet different usage requirements.

　　3. It has fault alarm and protection functions such as overvoltage, undervoltage, overcurrent, short circuit, phase loss, and water source shortage.

　　4. The main and backup fire pumps have a mutual backup function, and the backup pump will automatically start working when the main pump fails.

　　5. Dual power switching function can be installed according to user needs, or a separate dual power switching cabinet can be equipped. The main and backup power supplies can be automatically or manually switched. When the main power supply of the non negative pressure water supply equipment is cut off, the backup power supply will automatically be put into operation. When the main power supply is restored, the backup power supply will automatically exit.

　　6. According to user requirements, power frequency automatic inspection function or low-frequency automatic inspection function can be equipped. During inspection, the main pump is started and operated one by one, and if there is a fault, the pump will stop and give an alarm to avoid bearing corrosion, motor moisture, impeller jamming and other faults caused by long-term non operation of non negative pressure water supply equipment, ensuring that the equipment is in good condition. During the inspection process, receiving a fire signal automatically exits the inspection state and enters the fire operation state. Automatically open the valve to release water during power frequency inspection to ensure that the fire protection pipeline network does not exceed the pressure.

　　7. The device can also be equipped with a Building Automatic Control (BA) interface, which can be connected to the terminal computer for remote monitoring.

AfterSalesService :

• Non negative pressure variable frequency water supply equipment