Anti-shock lift check valve

Abstract

The invention relates to an anti-impact lift check valve. The anti-impact lift check valve is characterized in that an isolation block is arranged inside a guide sleeve, and a guide inner cavity is divided into a piston cavity and a pressure regulating cavity through the isolation block; the piston cavity is located above the isolation block, and the pressure regulating cavity is located below the isolation block; an air inlet hole is formed in the upper portion of the guide sleeve; one end of the air inlet hole communicates with the piston cavity, and the other end of the air inlet hole communicates with an outlet flow channel; a valve clack is composed of a valve clack head and a valve clack handle; the lower end face of the valve clack head is provided with a valve clack sealing surface capable of being sealed with a valve seat sealing surface; the upper end of the valve clack head stretches into the pressure regulating cavity, and the valve clack handle is installed at the upper end of the valve clack head; the upper end of the valve clack handle penetrates through a center hole of the isolation block to stretch into the piston cavity; a regulating hole perpendicular to the valve clack sealing surface is formed between the upper end face and the lower end face of the valve clack head, and the regulating hole communicates with an inlet flow channel and the pressure regulating cavity; an inverted counterbore hole is formed in the portion of the isolation block, and a floating plug is arranged at the inverted counterbore hole; and an air outlet hole is formed in a valve deck. The anti-impact lift check valve has the advantages that the valve clack sealing surface and the valve seat sealing surface cannot be damaged easily, the service life is long and noise is small.

Description

technical field [0001] The invention relates to a valve, in particular to an anti-impact lifting check valve. Background technique [0002] The lift check valve refers to the valve that automatically opens and closes the valve disc by relying on the flow of the medium itself, and is used to prevent the reverse flow of the medium. transfer, and the discharge of the container medium, the existing lift check valve mainly includes: valve body, valve seat, valve disc, guide sleeve and valve cover. The outlet end of the inlet channel is provided with a valve seat, the upper end of the valve seat is provided with a valve seat sealing surface, the valve cover is installed at the upper end of the middle part of the valve body, the upper end of the guide sleeve is fixedly installed between the valve body and the valve cover, and the lower end of the guide sleeve extends into the middle cavity , the valve disc is set inside the guide sleeve, the outer circle of the valve disc and the ...

AI Technical Summary

Problems solved by technology

[0002] The lift check valve refers to the valve that automatically opens and closes the valve disc by relying on the flow of the medium itself, and is used to prevent the reverse flow of the medium. transfer, and the discharge of the container medium, the existing lift check valve mainly includes: valve body, valve seat, valve disc, guide sleeve and valve cover. The outlet end of the inlet channel is provided with a valve seat, the upper end of the valve seat is provided with a valve seat sealing surface, the valve cover is installed at the upper end of the middle part of the valve body, the upper end of the guide sleeve is fixedly installed between the valve body and the valve cover, and the lower end of the guide sleeve extends into the middle cavity , the valve disc is set inside the guide sleeve, the outer circle of the valve disc and the inner wall of the guide sleeve form an upper and lower guide, the lower end of the valve disc is provided with a valve disc sealing surface that can form the opening and closing of the valve with the sealing surface of the valve seat, and the upper end of the guide sleeve is provided with A check hole, one end of the check hole communicates with the outlet flow channel, and the other end communicates with the upper part of the valve disc in the guide sleeve. Under the action of the medium on the outlet side of the valve, the valve clack quickly closes downwards, and the disc sealing surface forms a large impact force on the sealing surface of the valve seat. The sealing surface of the valve clack and the valve seat sealing surface are easily damaged, which affects the service life. , and loud noise

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