C-shaped four-eccentric slurry pump control valve

Abstract

The invention relates to a C-shaped four-eccentric slurry pump control valve. The control valve comprises a valve body, a valve seat, a valve element, a valve shaft, a valve shaft and an oil cylinder; the valve body consists of a left valve body and a right valve body; the valve element has a C-shaped hemisphere structure; the pipeline diameter of the C-shaped hemisphere is the same as the diameter of an inlet and outlet pipeline; a valve clack matched with the valve seat is fixedly installed on the outer spherical surface of the C-shaped hemisphere; the valve clack is provided with a cone sealing surface; the valve shaft and the valve clack sealing surface, the valve shaft and a valve clack central line, and a valve clack sealing surface central line and a valve body passage central line form a three-eccentric structure; a valve shaft central line and the valve body passage central line are eccentrically installed; a piston rod of the oil cylinder is fixedly connected with the end of the valve shaft through a connecting lever; the end of the valve shaft is fixedly connected with a heavy hammer; and the heavy hammer is in a horizontal state when the valve element is opened. The C-shaped four-eccentric slurry pump control valve has the advantages of erosion resistance, leakproofness, reliability, long service life, small flow resistance, simplicity in pipeline cleaning, high operation efficiency, low operation noise and small closed water hammer, and is applicable to a protection valve for avoiding backflow of media on an outlet pipeline of a water pump.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a control valve for a pump outlet pipeline. The invention is suitable for the protection valve on the outlet pipeline of the water pump to prevent the backflow of the medium. Background technique [0002] A valve is generally installed on the outlet pipe of the water pump to prevent the medium from backflowing and damaging the equipment when the pump is shut down. At present, the protection valves used at the outlet of water pumps are mostly swing check valves and butterfly check valves. With these two structures, when the water pump is turned on, the medium pushes the disc to open automatically, and when the water pump stops , The self-weight of the valve disc and the thrust of the reverse medium on the valve disc make the valve close automatically, and the reverse flow of the valve seat medium will damage the pump equipment. However, the disadvantages of using these two structures of va...

AI Technical Summary

Problems solved by technology

However, the disadvantages of using these two structural valves are: after the valve disc is opened, the sealing surface of the valve disc is in the medium flow channel, and the medium will cause scour and wear on the sealing surface of the valve disc, which will affect the service life of the product; Flow resistance increases the loss of fluid energy, reduces the operating efficiency of the pump, and cannot be pigged; when the valve disc is closed, the valve disc and the valve seat have a large impact, the impact vibration noise is large, the sealing surface is damaged, and the closing water hammer is large

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