Cylinder mixing type self-priming pump

Abstract

The invention provides a cylinder mixing type self-priming pump and belongs to the technical field of water pumps. The cylinder mixing type self-priming pump solves the problems of existing self-priming pumps that cavitation occurs easily and the speed of discharging air in a pump body is low. The cylinder mixing type self-priming pump comprises a pump body provided with a pump cavity inside, an impeller arranged in the pump body, and a motor arranged on the rear portion of the pump body and used for driving the impeller to rotate, wherein a transverse inlet is formed in the front portion of the pump body, a longitudinal outlet communicated with the pump cavity is formed in the top of the pump body, a peripheral outlet of the impeller is communicated with the pump cavity, a jetting body provided with a cavity inside is arranged in the pump cavity, a first inlet communicated with the transverse inlet and a first outlet communicated with an axial inlet of the impeller are formed in the jetting body, a diffusion pipe is vertically arranged in the cavity, a second inlet communicated with the pump cavity is formed in the lower portion of the diffusion pipe, a second outlet located above the first inlet and the first outlet is formed in the upper portion of the diffusion pipe, and a ball sealer used for sealing the second inlet is arranged on the second inlet. The cylinder mixing type self-priming pump enables air in the pump body to be discharged in time and has the advantages of being reasonable in structural design, high in pumping efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of water pumps, and relates to a self-priming pump, in particular to a cylinder-mixing self-priming pump. Background technique [0002] The self-priming pump includes pump body, motor, impeller and other components. There is a delivery channel in the pump body. After the pump stops running, a certain volume of liquid is stored in the delivery channel. When the pump starts, the liquid in the delivery channel is in the impeller. Under the action, the air is thrown upwards. Self-priming pumps are divided into external mixing self-priming pumps and internal mixing self-priming pumps. External mixing self-priming pumps add a liquid storage tank to the suction port of a centrifugal pump. During the self-priming process of this pump, The inhaled air should be mixed with the conveyed liquid and conveyed out through the impeller of the pump. Cavitation will occur during the self-priming process, which will cause gre...

AI Technical Summary

Problems solved by technology

Self-priming pumps are divided into external mixing self-priming pumps and internal mixing self-priming pumps. External mixing self-priming pumps add a liquid storage tank to the suction port of a centrifugal pump. During the self-priming process of this pump, The inhaled air should be mixed with the conveyed liquid and conveyed out through the impeller of the pump. Cavitation will occur during the self-priming process, which will cause great damage to the impeller of the pump. Every time the pump is started, the pump will be damaged; Suction pump, there is a gas-liquid separation chamber in the pump cavity, and there is a backflow hole. Due to the influence of the backflow hole, the efficiency of the pump is generally 8%-10% lower than that of a general centrifugal pump.

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