1500 cubic meter vacuum assisted self-priming sewage pump

Working principle of vacuum assisted self-priming sewage pump

The vacuum assist device with vacuum assisted self-priming pump mainly consists of components such as controller, vacuum pump, steam water separator, liquid level sensor, exhaust valve, etc. connected by wires and pipelines, and installed on the self-priming pump. The liquid level sensor is installed inside the exhaust valve, which is installed at the inlet of the self-priming pump. Above the exhaust valve, a pipeline is connected through an electromagnetic valve and the suction port of the steam water separator vacuum pump. The liquid level sensor, self-priming pump motor, and vacuum pump motor are connected to the control cabinet through power lines to achieve automatic control of the vacuum pump and self-priming pump through the control cabinet key. The outlet of the vacuum pump is equipped with a check valve. Press the start button on the control cabinet, and the vacuum pump will start first (it can also be made into a vacuum pump or self-priming pump to start). The inlet pipeline of the self-priming pump and the air inside the pump body will be evacuated, forming a vacuum negative pressure state between the pump body and inlet pipeline, so that the medium fills the inlet pipeline and pump body of the self-priming pump. After the self-priming pump body and inlet pipeline are filled with water, they will enter the exhaust valve installed above the self-priming pump outlet. When the liquid level in the exhaust valve reaches a certain position, the liquid level sensor in the exhaust valve will transmit a signal to the control cabinet. The control cabinet will then close the vacuum pump and solenoid valve, and start the self-priming pump to enter normal working state. Electromagnetic valves and steam water separators can ensure that water does not enter the vacuum pump and cause damage to the vacuum pump. Anyway, if the liquid in the exhaust valve drops, it proves that the suction force of the self-priming pump itself is not enough. The liquid level sensor will transmit a signal to the control cabinet, and the control cabinet will restart the vacuum pump to assist the self-priming pump in increasing the suction stroke.

QZZSL1500 cubic meter vacuum assisted self-priming sewage pumpProduct Features:

1. The strong self-priming automatic control function has high suction range, ultra fast self-priming, and can start and control automatically without the need for water injection. It is particularly suitable for use in locomotive integrated mobile pump stations as a water supply and drainage equipment, and can be widely used in flood control, drainage, fire protection and other occasions.2. Due to its ultra fast self-priming, it greatly reduces the self-priming time by 60%, effectively improves operational efficiency by more than 50%, increases suction height by more than 30%, and extends its service life, achieving durability, stability, practicality, economy and other functions of use.3. Due to the use of a double suction self-priming vacuum pump set and the clever combination design structure of the automatic control system, it is more widely used in high flow and large diameter applications. Because of the double suction structure, water enters the impeller at both ends and is discharged in the middle without axial tension, so there is no upper limit on the flow rate and diameter. The normal diameter is between DN100~DN600, and the flow rate is between 100 tons and 3000 tons. Non standard flow rates can be customized regardless of the diameter or size.4. It can work normally without the need for water injection during use, is resistant to dry abrasion, and does not require a bottom valve, which is fundamentally and structurally different from other products. Due to its strong self-priming and automatic control functions, it has ultra-high suction range and ultra fast self-priming start that can be automatically controlled (i.e. when the vacuum degree drops to a low level, the vacuum pump group automatically starts, and when the vacuum degree rises to a high level, the vacuum pump group automatically stops with multiple functions, without interfering with the operation of the main pump and playing an auxiliary role).5. The newly adopted automatic water diversion device introduces a new mode of using a built-in mechanical float ball valve and monitoring probe, greatly improving the reliability of the equipment. Even if the vacuum pump is running continuously and the water level in the water tank reaches a certain position, the mechanical float ball valve will automatically close due to buoyancy, preventing water from entering the vacuum pump and providing dual protection for the vacuum pump, preventing damage to its components due to water ingress. Added a water blocking valve, installed on the external pipeline, which can effectively block water vapor from entering the vacuum pump.

High suction range and strong vacuum self-priming pumpScope of application:

The ambient temperature is ≤ 50 ℃, the medium temperature is ≤ 80 ℃, and special requirements require a temperature of up to 200 ℃.

The pH value of the medium is 6-9 for cast iron and 2-13 for stainless steel

Medium poisoning not exceeding 1240kg/m3

The self-priming height of ordinary self-priming pumps cannot exceed the specified value of 5-7 meters, and the length of the suction pipe is ≤ 10m. The vertical height of high suction self-priming pumps can reach 9 meters, and the horizontal distance exceeds 200 meters.

The QZZSW sewage type has a suspended particle diameter of about 20% of the pump diameter and a fiber length of about 5 times the pump diameter.

1500 cubic meter vacuum assisted self-priming sewage pumpMaintenance requirements

1. Before maintenance and cleaning of the self-priming pump, ensure that the power supply is turned off, the residual liquid in the pump body is discharged, and the inlet and outlet are closed. Maintenance personnel should wear protective clothing and face shields, safety shoes, and socks

2. Regularly check the access buttons to prevent foreign objects from blocking the pump body and causing the motor to spin and burn out the pump.

3. The combination of motor and pump must be calibrated accurately to make the motor and pump in the same line.

4. The shaft seal cover is fixed on the rear axle seal, and when the rear cover is locked on the foot seat, it must be in the center of the pump.

5. The fixing screw of the impeller locks the impeller in a clockwise direction. The gap between the impeller and the middle cover is about 1-1.5mm, and the size of the gap will cause wear on the impeller.