Submersible sewage pump is a pump and motor connected, and at the same time diving under the liquid pump products, compared with the general horizontal pump or vertical sewage pump, self-priming sewage pump compact structure, small floor area of a new generation of pumps.
Sewage pump is combined with the characteristics of the use of domestic pumps and successfully developed a new generation of pump products, which can tear and cut off long fibers, bags, belts, grass, cloth and other substances in sewage, and then discharge smoothly, especially suitable for conveying liquids containing hard solids, fibers and especially dirty, sticky, slippery liquids. AS, AV submersible sewage pump in the discharge of solid particles and long fiber waste, has a unique effect.
The sewage pump adopts a unique structure and a new type of mechanical seal, which can effectively transport solids and long fibers. Compared with the traditional impeller, the impeller of the pump adopts the form of single channel or double channel, which is similar to a bend pipe with the same section size, has very good flow performance, and is equipped with a reasonable cochlear chamber, which makes the pump with high efficiency, and the impeller is tested by dynamic and dynamic balance, so that the pump has no vibration in operation.
First, submersible sewage pump · Advantages
Compared with the general horizontal pump or vertical sewage pump, submersible sewage pump obviously has the following advantages:
1, compact structure, small footprint. The submersible sewage pump can be installed directly in the sewage tank because it works under the liquid, and there is no need to build a special pump room for installing pumps and machines, which can save a lot of land and infrastructure costs.
2, easy installation and maintenance. Small sewage pumps can be installed freely, large sewage pumps are generally equipped with automatic coupling devices can be automatically installed, installation and maintenance is quite convenient.
3. Long continuous operation time. Because the pump and motor are coaxial, the shaft is short, and the rotating parts are light in weight, the load on the bearing (radial) is relatively small, and the life is much longer than that of the general pump.
4, there is no cavitation damage and irrigation water problems. In particular, the latter point brings great convenience to the operator.
It is precisely because of the above advantages, submersible sewage pumps have been more and more people's attention, the scope of use is also more and more wide, from the original simply used to transport water to transport a variety of domestic sewage, industrial wastewater, construction site drainage, liquid feed and so on. It plays a very important role in municipal engineering, industry, hospital, construction, hotel, water conservancy construction and other industries.
Second, submersible sewage pump · Shortcomings
The most critical issue for submersible sewage pumps is reliability, because the use of sewage pumps is under liquid; The conveying medium is some mixed liquid containing solid materials; The pump is very close to the motor; The pump is arranged vertically, and the weight of the rotating parts is in the same direction as the water pressure of the impeller.
These problems make the sewage pump in sealing, motor bearing capacity, bearing layout and selection requirements are higher than the general sewage pump.
3. Submersible sewage pump · Research and development
In order to improve the life of the sewage pump, most manufacturers at home and abroad are trying to find a way on the pump protection system, that is, when the pump leaks, overload, overtemperature and other failures, it can automatically alarm, and automatically shut down for repair.
However, we believe that it is necessary to set up a protection system in the sewage pump, which can effectively protect the safe operation of the electric pump. But this is not the key to the problem, the protection system is only a remedy after the failure of the pump, is a more passive approach. The key to the problem should be to start fundamentally and completely solve the problems of the pump in sealing, overload and so on, which is a more active way
Therefore, we apply the fluid power seal technology of the auxiliary impeller and the non-overload design technology of the pump to the submersible sewage pump, which greatly improves the reliability and bearing capacity of the pump seal, and prolonging the service life of the pump.