Water pump for sewerage system

Abstract

The invention mainly discloses a water pump for a sewerage system. According to the technical scheme, the water pump comprises a pump body, a motor, an impeller, a water inlet and a water outlet. The pump body comprises a sewage discharging cavity, a driving cavity and an oil adding cavity which are mutually isolated; a filtering net and at least two water flow channels are disposed between the water inlet and the sewage discharging cavity; the filtering net is connected with cleaning devices and an impurity collecting device; water inlet valves and first water flow sensors are disposed in the water flow channels; a second water flow sensor is disposed at the water outlet; a first flow guide plate and a second flow guide plate are disposed on the left side and the right side of the sewage discharging cavity correspondingly; and a smashing wheel is connected to a rotary shaft of the motor. By means of the water pump for the sewerage system, the risk of water leakage is reduced; the service life of the water pump is prolonged; impurities in sewage are reduced through the filtering net and the smashing wheel, and the sewage discharging cavity and the impeller are prevented from being blocked; the service life of the motor is prolonged; and no-water protection is performed through the first water flow sensors and the second water flow sensor, and the comprehensive property of the water pump is improved.

Description

technical field [0001] The invention relates to a water pump for a sewage system. Background technique [0002] The sewage pump is a kind of water pump used to transport sewage. It has a compact structure, a small footprint, and is easy to install and maintain. The sewage pump is coaxial with the motor, the shaft is short, and the rotating parts are light. Therefore, the load on the bearing (diameter To) is relatively small, life is much longer than the general pump. Sewage pumps have the characteristics of being able to transport liquids containing hard solids and fibers, as well as particularly dirty, sticky and slippery liquids, so they are widely used in mining, papermaking, printing and dyeing, environmental protection, oil refining, petroleum, chemical industry, farms, dyeing In the sewage treatment of chemical, food, chemical fertilizer, mud pond and other fields. [0003] As the content of solid matter and fibers in sewage is getting higher and higher, the requirem...

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Problems solved by technology

[0003] As the content of solid matter and fibers in sewage is getting higher and higher, the requirements for anti-clogging performance of water pumps in the sewage system are also getting higher and higher. The isolation between the drive chamber and the drainage chamber of the sewage pump in the prior art is not good. Strong, the motor in the driving cavity will not only be under the pressure of the diving depth, but also have the risk of water ingress, which will cause the motor to burn out and reduce the service life and utilization of the sewage pump. A large amount of particulate impurities, strip-shaped impurities, etc., once these impurities enter the sewage chamber, they will frequently block the impeller, cause overload of the motor, burn out the motor, and require frequent shutdowns for cleaning, which reduces the efficiency of sewage discharge. Both require a lot of manpower, material resources and time. At the same time, frequent disassembly of the pump body will easily cause increased wear of the pump port ring and other components, reducing the service life of the water pump; , lack of water-free protection device, because the water pump works under water, people cannot know the working condition of the water pump well. During the working process, once the water in the pipeline cannot enter the pump body, the water pump will form a vacuum state. If the pump continues to work without stopping, there will be great friction between the rotating body and the fixed body of the mechanical seal in the pump, which will cause damage to the parts inside the pump, which will not only affect the automatic working performance of the pump, but also increase the maintenance cost of the pump and reduce the service life of parts

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