Elevating type hydraulic slow-closure silencing check valve

Abstract

The invention provides an elevating type hydraulic slow-closure silencing check valve and relates to a check valve which is mounted on a pipeline and used for preventing media in the pipeline from flowing back. The elevating type hydraulic slow-closure silencing check valve is mainly designed to solve the problem that an existing check valve cannot reduce water hammers. The elevating type hydraulic slow-closure silencing check valve comprises a valve body, a valve body support is cast with the valve body into a whole, a sealing base is arranged in the valve body, a sealing base support is fixedly arranged on the sealing base, a piston rod is fixedly arranged on the sealing base support, the piston rod is arranged in the inner cavity of a valve rod, a rear cap is arranged on the wall of the inner cavity at the rear end of the valve rod, a water in-out hole is formed in the rear cap, the valve rod is arranged on an opening of the valve body support, a valve clack is fixedly arranged at the front end of the valve rod, a guide sleeve is arranged on the wall of the inner cavity of the valve rod, the guide sleeve is connected with the valve clack through a pressing cover, the outer circle of the valve clack is contacted with the sealing base, a sealing ring is arranged on the contact face of the valve clack and the sealing base, one end of a spring sleeved on the outer wall of the valve rod abuts against the valve body support, and the other end of the spring abuts against the valve clack. The elevating type hydraulic slow-closure silencing check valve has the advantage that the valve clack has a slow-closure function.

Description

Technical field: [0001] The invention relates to a check valve installed on a pipeline for preventing medium in the pipeline from flowing backward. Background technique: [0002] The water hammer generated when the medium in the pipeline flows back will cause great harm to the entire pipeline network, pumps and valves, so it is necessary to install a check valve on the pipeline to prevent the medium from flowing back. The existing check valve closes quickly when the medium flows back, and the noise is large, which only plays a role in blocking the water hammer, but cannot reduce the water hammer, and is more harmful to the pipe network. In addition, when installed horizontally, due to factors such as the weight of the valve disc and water flow, the valve disc and the sealing seat are not in the same axis, and the sealing effect is poor. Invention content: [0003] The technical problem to be solved by the present invention is to provide a lift-type hydraulic slow-closing ...

AI Technical Summary

Problems solved by technology

The existing check valve closes quickly when the medium flows back, and the noise is loud, which only plays a role in blocking the water hammer, and cannot reduce the water hammer, which is more harmful to the pipe network

In addition, when installed horizontally, due to factors such as the weight of the valve disc and water flow, the valve disc and the sealing seat are not in the same axis, and the sealing effect is poor.

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