Protection device of pump and pump assembly

Abstract

The invention discloses a protection device of a pump, and belongs to the field of pump monitoring and protection. The protection device comprises a tuning fork switch, a detection assembly, a protection pipeline used for communicating with an outlet of the pump and a first controller used for controlling the pump to be stopped. A through hole is formed in the pipe wall of the protection pipeline.A vibration tuning fork of the tuning fork switch is mounted in the through hole in an inserted manner. The protection pipeline and a vibration joint of the tuning fork switch are in sealed connection. The detection assembly comprises a detection barrel, a piston, a metal disc and two binding posts. The detection barrel is located on the outer wall of the protection pipeline and communicates withthe protection pipeline. The piston is arranged in the detection barrel in a sliding manner. The metal disc is arranged on the side, back on to the protection pipeline, of the piston. The two bindingposts are arranged oppositely on the inner wall of the detection barrel in a spaced manner. One binding post in the two binding posts is used for being connected with an output circuit of the first controller, and the other binding post in the two binding posts is used for being connected with an input circuit of the pump. By means of the protection device, the situation that the pump stops working due to misoperation of the tuning fork switch can be avoided, and the high efficiency of the pump can be improved.

Description

technical field [0001] The invention relates to the field of machine pump monitoring and protection, in particular to a pump protection device and a pump assembly. Background technique [0002] A pump is a machine that moves or pressurizes a fluid. The pump usually includes an impeller, a pump casing and a pump shaft. The impeller is installed on the pump shaft and is set in the pump casing together with the pump shaft. The pump shaft is directly driven by a driving part (such as a motor) to drive the impeller to rotate to achieve the fluid delivery. Purpose. [0003] During the working process of the pump, if the pump is not filled with fluid, the pump will appear to be pumped out. Evacuation of the pump will cause large fluctuations in the outlet pressure of the pump, intermittent fluid flow, and strong vibration of the pump, causing damage to the pump. At present, whether the outlet line of the pump is full of fluid is detected by a tuning fork switch. [0004] Howeve...

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Problems solved by technology

[0004] However, the tuning fork switch is prone to misjudgment due to factors such as the environment during use, which will cause the pump to stop working when the outlet pipe is full of fluid, which is not conducive to the efficient use of the pump

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