A kind of submersible pump that prevents sewage and dirt from clogging

Abstract

The invention relates to the technical field of water pumping equipment, in particular to a submersible pump for preventing sewage and dirt from clogging, comprising a pump machine, an impeller shell and a drain pipe, a water inlet cover is arranged at the water inlet of the impeller shell, and the water inlet The cover includes an outer cover and an inner cover, and the inner cover is located inside the outer cover; in the present invention, a water inlet cover is provided at the water inlet of the submersible pump, and the water inlet cover is divided into an outer cover and an inner cover, and both the inner cover and the outer cover are provided with The dense-pore filter plate and the porous filter plate are installed, and the inner cover is set in the shape of a small conical cylinder at the lower end. Under normal conditions, the dense and porous filter plates on the outer cover and inner cover are interlaced. When the water environment When there is a lot of dirt, the dense-porous filter plate will be blocked, so that the upward thrust is intermittent during the rotation of the inner cover, so the inner cover can be formed to shake up and down in the outer cover, which not only cuts off the dirt, but also And it can realize the intermittent entry of dirt into the impeller shell, preventing blockage caused by excessive feeding at one time.

Description

technical field [0001] The invention relates to the technical field of water pumping equipment, in particular to a submersible pump for preventing clogging of sewage and dirt. Background technique [0002] Submersible pumps are widely used in infrastructure construction, agricultural irrigation, industrial sewage discharge and other fields. Before the submersible pump starts to work, the suction pipe and the pump body need to be filled with liquid; after the pump is turned on, the impeller rotates at a high speed, and the liquid entering the pump rotates with the blades, and is ejected outward under the action of centrifugal force, and the ejected liquid is in the diffusion chamber of the pump casing The speed gradually slows down, the pressure gradually increases, and then flows out from the outlet of the pump and the discharge pipe. At this time, a vacuum low-pressure area without air and liquid is formed at the center of the blade because the liquid is thrown to the surr...

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Problems solved by technology

When the submersible pump is used in the field of sewage treatment, it generally has a crushing channel structure, which can cut and tear the long fibers and cloth bags in the sewage, and then discharge it smoothly. However, the crushing structure is generally directly connected to the motor shaft. The inhaled dirt gathers a lot, which will easily cause a large impact on the rotor, affect the service life of the motor, and may cause the motor to shut down in severe cases. In addition, such as the application number CN201611242051. Flush to achieve the purpose of unblocking, but it requires another control system to control the motor to stop and reverse, and the impurities after being backwashed still remain around the suction port, and will accumulate more and more, resulting in frequent backwashing. Affect work efficiency

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