Self-suction centrifugal pump

Abstract

The invention relates to a self-suction centrifugal pump which comprises a pump body and a motor, wherein impellers are installed on a motor shaft of the motor, the pump body comprises a water inlet channel, a volute and a water tank, the volute is connected to the motor in a buckled mode, and the impellers are located inside the volute. The volute is located under the water tank, and an outlet of the volute is connected with an upper water port arranged in the bottom of the water tank. The bottom end of the water inlet channel is connected with an inlet located in the center of the volute, the outer wall of the upper end of the water inlet channel is attached to the outer wall of the water tank and is provided with a water hole enabling an inner cavity of the water inlet channel and an inner cavity of the water tank to be communicated, and a water supply connector is arranged at the top end of the water inlet channel. The self-suction centrifugal pump further comprises a tank cover arranged on the top of the water tank in a buckled mode, and the tank cover is provided with a water supply port and a water outlet connector. A partition plate parallel with the motor shaft in direction is arranged on the top of the inner cavity of the water tank. The self-suction centrifugal pump further comprises a rotating plate, a plate body at the upper end of the rotating plate rotates with a central line, of a connection portion located at the lower end of the rotating plate, as an axis, a water hole stop block is further arranged on the connection portion through a support rod, and the water hole stop block seals up the water hole when the plate body of the rotating plate rotates to a position where the rotating plate is attached to the partition plate.

Description

technical field [0001] The invention belongs to the technical field of water pumps, in particular to a self-priming centrifugal pump. Background technique [0002] Among the various types of water pumps, the centrifugal pump is a relatively common one. It has been more and more widely used due to its advantages of simple and compact structure, convenient maintenance, high-speed and stable operation. Centrifugal pumps are generally driven by a motor. When the impeller rotates at high speed, the impeller drives the liquid to rotate together. Due to the centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller, and the kinetic energy increases accordingly. When the liquid enters the pump casing, due to the gradual expansion of the flow channel in the volute-shaped pump casing, the flow rate of the liquid decreases gradually, and part of the kinetic energy is converted into static pressure energy, so the liquid flows out along the ...

AI Technical Summary

Problems solved by technology

Centrifugal pumps also have certain shortcomings, that is, they need to add an appropriate amount of priming fluid to the pump body before starting, and when the suction pipeline is long, it is even necessary to fill the entire pipeline with priming fluid, which limits its use.

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