product overview

The XWG type non negative pressure water supply equipment is a complete set of water supply equipment developed by our company's professional technical personnel on the basis of pneumatic water supply equipment, which can be directly connected to the tap water pipe network and does not have any side effects on the tap water pipe network. He replaced the water storage tank and roof water tank, which can fully utilize the pressure of the tap water network to directly or indirectly supply water, avoiding secondary waste of energy and secondary pollution of water quality, greatly saving infrastructure investment and shortening construction period.

The traditional water supply method relies on the water in the reservoir, which is usually supplied by the tap water network. In this way, the pressurized water enters the reservoir and becomes zero, causing a large amount of energy to be wasted.

The XWG type non negative pressure water supply equipment consists of an intelligent variable frequency control cabinet, a steady flow tank, a water pump unit, instruments, valves and pipelines, a base, etc. It is suitable for all water supply systems that require increased water pressure and constant flow rate.

When the WB type non negative pressure water supply equipment is put into normal use, water from the municipal pipeline enters the non negative pressure steady flow tank, and a large amount of air inside the tank is discharged from the exhaust valve. When the air is exhausted, the floating ball inside the valve is lifted by removing water, and the transmission plug is moved to the closed position. Slowly close the exhaust port, stop the exhaust, and prevent water from flowing out. When the water flow in the steady flow tank is normal, if a small amount of air accumulates in the valve to a considerable extent, the water level inside the valve will drop, and the floating ball will follow suit. At this time, the air will be discharged through the exhaust hole.

During the normal operation of the XWG type non negative pressure water supply equipment, when the municipal water supply network is insufficient, the water flow in the municipal inlet pipe is empty, or the water pressure in the stabilizing tank is lower than atmospheric pressure, the water level in the stabilizing tank drops, and the floating ball descends accordingly, driving the plug to open and suck in air, so as to maintain atmospheric pressure in the stabilizing tank and prevent negative pressure on the municipal water network.

When the pressure in the municipal pipeline network is lower than the set pressure required by the user, the water pump operates with variable frequency speed regulation to ensure that the pressure in the user's pipeline network meets the user's water requirements. The higher the water pressure in the municipal pipeline network. The lower the speed of the water pump, the lower the water pressure in the municipal pipeline network, and the higher the speed of the water pump. When the water supply pressure of the municipal pipeline network reaches the user's requirements, the WB type non negative pressure water supply equipment automatically stops working, and the water in the municipal pipeline network is directly supplied to the user through the bypass pipe. When the municipal pipeline network stops water supply, the water level in the stabilizing tank gradually decreases. When it drops to a low water level, the liquid level gauge on the stabilizing tank sends a shutdown signal, and the XWG type non negative pressure water supply equipment automatically stops running and displays a water shortage protection signal.

When the power grid is shut down, the XWG non negative pressure water supply equipment stops, and the water in the municipal pipeline network is directly supplied to users through the bypass pipe of the XWG non negative pressure water supply equipment.

Product Features

1. No need to build a water tank, energy-saving, and cost saving:

The XWG type non negative pressure water supply equipment is economical, hygienic, and has significant energy-saving effects. Practice has proven that the use of intelligent non negative pressure steady flow water supply equipment can save more than 50% of the cost of building new water tanks. Compared with other water supply equipment, it can save 20% to 40%.

2. Easy installation and space saving:

The XWG type non negative pressure water supply equipment can be equipped with both horizontal and vertical steady flow tanks. The two types of steady flow tanks have different characteristics: horizontal steady flow tanks occupy less space, vertical steady flow tanks occupy less area, and the manufacturing and testing of steady flow tanks comply with the provisions of GB150 "Steel Pressure Vessels". The inner wall of the tank adopts advanced '841 epoxy polyamide food container inner wall coating', anti-corrosion, and safe compliance with national food hygiene standards.

3. Widely applicable and adaptable:

The XWG type non negative pressure water supply equipment can be used for domestic water supply, fire water supply, and can be equipped with any type of water pump. When the equipment is used for fire protection, it is recommended to equip it with a dedicated fire pump.

4. Fully functional and highly adaptable:

The XWG type non negative pressure water supply equipment adopts advanced human-machine frequency conversion control technology, with soft start, overload, short circuit, overvoltage, undervoltage, phase loss, overheating, and stall protection functions. Signal alarm, self check, fault diagnosis, etc. are carried out in abnormal situations, and the water supply flow rate is automatically adjusted according to the high or low water consumption.

5. Advanced products and reliable quality:

The accessories used in the XWG type non negative pressure water supply equipment have been selected by many manufacturers and have reliable quality assurance. The key components in the product, such as motors, water pump bearings, frequency converters, circuit breakers, contactors, relays, etc., are made of international and domestic high-quality branded products.

Installation and debugging

1. The basic dimensions of the equipment should be constructed according to the foundation drawings provided by the manufacturer, and its position and standards should comply with the quality requirements for equipment foundation dimensions and positions in the engineering design and TJ231.

2. After the equipment is in place, level it with a spirit level, and its longitudinal and transverse levelness should be less than 0.1%.

3. After the equipment is installed and leveled, the foundation is grouted with expansion cement for a second time, and piping is carried out after 24 hours of maintenance.

4. After wiring the motor, the rotation direction should be confirmed to ensure consistency with the standard arrow.

Usage and Operation

1. Before using the equipment, the water pump rotor should be turned without friction or jamming.

2. The insulation of the motor detected by the 500V low-voltage shake meter should be above 0.5M.

3. The control instruments and circuits are undamaged.

4. Fully open the inlet valve of the water pump, close the outlet valve, open the exhaust valve of the pump one by one, and close the air valve after the liquid fills the pump chamber.

5. Place the switch in the manual position and jog the water pump with no load. The direction of operation should be consistent with the standard arrow.

6. Manually start and stop each water pump one by one, and check that there are no abnormal phenomena in the operation of the water pumps.

maintenance

1. Before putting the equipment into operation, the system should be cleaned and purged to prevent impurities from entering the pump body and causing equipment damage.

2. The water pump should not operate for a long time with the outlet valve fully closed, nor should it operate at the hump in the performance curve, nor should it run without air. When the shaft seal adopts a disc root seal, a leakage of 10-20 drops/min is allowed.

3. The bearing temperature during operation shall not exceed 75 degrees Celsius.

4. The water pump should lubricate the bearings every 500 hours of operation.

5. Necessary measures should be taken for long-term shutdown of equipment to prevent contamination and corrosion. Antifreezing and insulation measures should be taken for winter shutdown.

6. The operation of equipment should be subject to preliminary discharge based on water quality conditions.

Functional characteristics of non negative pressure water supply equipment

1. Two working modes:

Automatic working mode: Automatic mode is a working mode under normal water supply conditions. Generally speaking, when the customer selects this method after normal water supply, all different water supply requirements of the pipeline network will be adapted to various functions under the effective control of the non negative pressure water supply equipment when working in automatic mode.

Manual working mode: This operation mode is set for emergency use by users in case of automatic working mode failure. This working mode completely adopts a simple starting method, which directly starts and stops any water pump motor on the operation panel. Generally, it is only used in case of automatic failure or debugging.

2. Easy to integrate into intelligent management systems, the main components use high-quality components, and the entire system has high reliability and anti-interference ability. Its built-in standard serial communication port (RS485) makes communication between the system and the computer very convenient.

3. Water level protection function, when the water level in the water tank is lower than the set water level, the system automatically protects and shuts down. The liquid level controller has stable and reliable performance.

4. Automatic reset function, the system automatically starts when the power is restored after a power outage or when the water level is restored.

5. Fault pump shielding function, after the fault pump is shielded, it will directly exit the operating program and be replaced by a backup pump.

6. Automatic protection function: It has automatic protection functions such as overload, overcurrent, short circuit, phase loss, overvoltage, undervoltage, and water shortage shutdown.

Structural diagram of non negative pressure water supply equipment

Performance parameters of non negative pressure water supply equipment