Noise elimination slowly-closed check valve with inner damping system

Abstract

The invention provides a noise elimination slowly-closed check valve with an inner damping system. The noise elimination slowly-closed check valve comprises a valve body. A valve plate is arranged ina spherical through cavity through a valve base fixed to an inner cavity in one side of the valve body. The valve body is internally provided with a positioning rod. The positioning rod is provided with a through cavity along the axis. The other end of the positioning rod is in sliding connection with a damping piston. A valve plate spring is arranged on the outer wall of the positioning rod. A deep hole is formed in the end, away from a reset spring, of the damping piston. The side wall of the position corresponding to the deep hole is provided with a crisscross medium releasing hole. The side, making contact with the reset spring, of the damping piston is provided with a flow accumulation hole in the axis direction, wherein the flow accumulation hole communicates with the deep hole. According to the noise elimination slowly-closed check valve with the inner damping system, through cooperation of simple structures and mutual adjustment of a series of damping movements of the piston, valve plate closing movement damping is achieved, valve slow closing and noise elimination are guaranteed, noise is lowered, the buffering effect is good, and the service life of the valve is prolonged.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a noise-absorbing slow-closing check valve with a built-in damping system. Background technique [0002] Noise-absorbing check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself, and is used to prevent the backflow of the medium. The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, prevent the pump and the drive motor from reversing, and discharge the medium of the container. On the supply pipeline for the system, check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis), but the existing check valves have poor motion stability. The noise elimination effect is not good. In view of this situation, the present invention proposes a noise elimination slow-closing check valve with...

AI Technical Summary

Problems solved by technology

[0002] Noise-absorbing check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself, and is used to prevent the backflow of the medium. The check valve is an automatic valve, its main function is to prevent the reverse flow of the medium, prevent the pump and the drive motor from reversing, and discharge the medium of the container. On the supply pipeline for the system, check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lifting check valves (moving along the axis), but the existing check valves have poor motion stability. The noise reduction effect is not good. In view of this situation, the present invention proposes a noise reduction slow-closing check valve with a built-in damping system. Through the cooperation of a simple structure and the mutual adjustment of a series of damping movements of the piston, the The damping of the closing movement of the valve plate ensures that the valve closes slowly and eliminates noise, reduces noise, has a good cushioning effect, and improves the service life of the valve

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