Vertical submerged pump with automatic liquid drainage function

Abstract

The invention relates to a vertical submerged pump with an automatic liquid drainage function. The vertical submerged pump comprises a pump shell and a vertical pump shaft. The pump shell comprises apump cover and a pump body which are buckled vertically. A motor is connected to the upper end of the pump shaft. The lower end of the pump shaft penetrates the pump cover and is connected with an impeller in the pump shell. A water inlet is formed in the lower surface of the pump body. The water inlet extends upwards and communicates with an impeller circumferential water tossing space, corresponding to the impeller, in the pump shell. The lower surface of the impeller circumferential water tossing space is an inclined plane lowered gradually toward the water inlet. The upper surface of the pump cover is an inclined plane which slopes toward the periphery with the pump shaft penetration position as the center. A gap is formed between the inner wall of a hole, for the pump shaft to penetrate, of the pump cover and a rotor corresponding to the interior of the hole. According to the vertical submerged pump, automatic drainage of remaining fluid is considered from many aspects, the corresponding construction is matched, when the pump is lifted out from the pumped fluid, the remaining fluid is drained completely and automatically under the gravity effect, water drainage operation doesnot need to be carried out specially, omission of working procedures is avoided, smoothness of follow-up work is ensured, and personal safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of non-variable pumps, in particular to a vertical submerged pump with automatic liquid discharge function. Background technique [0002] A centrifugal pump is a pump that delivers fluid by the centrifugal force generated when the impeller rotates. The fluid is sucked in from the water inlet and pumped out from the water outlet. When working, the pump shaft drives the impeller in the pump casing to rotate at high speed. Under the action of centrifugal force, the fluid is thrown to the outer edge of the impeller in the impeller circumferential water throwing space of the pump casing corresponding to the impeller. The volute type discharge channel connected with the water throwing space is pumped out from the water outlet, and at the center of the impeller, a negative pressure area is formed after the fluid is thrown out, and the external fluid is sucked from the water inlet under the action of pressure, and t...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a vertical submerged pump with an automatic liquid discharge function, so as to prevent the pump casing of the vertical submerged pump from The remaining liquid is not easy to discharge, which brings difficulties to the follow-up work, and the residual liquid can be automatically discharged without special drainage operation, which ensures the smooth follow-up work and the personal safety of operators.

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