How To Improve The Self-priming Ability Of Sanitary Volute Pumps
Sanitary Volute Pump adopts axial reflux external mixing, and through the unique design of pump body and impeller flow channel, it can not only do not need to install bottom valve and water diversion like general self-priming clean water pump, but also can absorb and discharge liquid containing large solid particles and long fiber impurities. It can be widely used in municipal sewage projects, river pond breeding, light industry, papermaking, textile, food, chemical industry, electricity, fiber, slurry and mixed suspension and other chemical media. The most ideal impurity pump. Compared with similar domestic products, the sanitary volute pump has the characteristics of simple structure, good self-priming performance, strong sewage discharge capacity, high efficiency and energy saving, easy use and maintenance, etc. It is the first domestic product in the sanitary volute pump series. Various technical performance indicators are leading in China and have reached the international advanced level, with broad application market and development prospects.
The principle of the sanitary volute pump is to use the flow velocity of water, and the impeller drives the pump impeller to pump water to the river bank. This pump can pump water by throwing it into the river, but it must be a place with a rapid flow or a drop. Self-priming means starting the pump without filling the suction pipe with liquid (but there must be enough liquid in the pump body). The pump itself can automatically expel the gas in the suction pipe and then enter normal operation. The pump must be filled with enough liquid when it is first started. When it is started later, the liquid remaining in the pump body will ensure that the pump can start again.
How to improve the self-priming ability of sanitary volute pumps?
1. Install a suction bottom valve at the end of the suction pipe of the sanitary volute pump. The suction bottom valve is actually a check valve, which ensures that water can only flow into the suction pipe from the pool and cannot flow back. Therefore, if the suction pipe is full of water, although the elevation of the pump axis is higher than the working water level of the pool, due to the effect of the suction bottom valve, the water in the suction pipe will not flow into the pool, so that the suction pipe is always full of water, ensuring that the pump can start automatically and quickly. The reliability of this water suction method is affected by the quality of the water suction bottom valve. For example, if it is not closed tightly or leaks, the water in the suction pipe will slowly flow into the pool. After a long time, there will be no water in the suction pipe, resulting in the need for manual water filling when the water pump is started.
2. The sanitary volute pump reduces the bends, drop height and horizontal distance of the water inlet pipe.
3. The sanitary volute pump is equipped with a suction tank before the pump. This method requires a water suction tank to be set on the water supply pump suction pipe. Before the first operation of the water pump, the tank should be filled with water manually. After the first operation stops, because the height of the water inlet pipe of the water suction tank is higher than the water level in the pipe, even if the water level in the pool is lower than the water level in the tank, the water in the tank will not flow back into the pool. Therefore, a certain amount of water can be stored in the water suction tank. Because the height of the water outlet pipe of the water suction tank (that is, the water suction pipe of the water pump) is lower than the water level in the pipe, it can ensure that the water suction pipe of the water pump is full of water. When the water pump is running again, the water in the water tank is pumped away by the water pump, and negative pressure appears in the tank. The water in the pool is supplemented into the water suction tank under the action of atmospheric pressure, and the water in the water tank is filled with water through the water suction tank.
4. The sanitary volute pump is equipped with a vacuum pump on the water pump suction pipeline. Before the water pump is started, the vacuum pump is started first to fill the water in the water pump suction pipe first, so as to ensure that the water pump starts automatically and quickly. This water suction method requires a complete automatic control system to ensure normal operation.
5. Choosing a suitable new pipeline for the sanitary volute pump is also an effective way to improve the self-priming ability.
