Check valve

Abstract

The invention discloses a check valve comprising a valve body. An upper valve cavity and a lower valve cavity are formed in the valve body. A valve opening used for making the upper valve cavity and the lower valve cavity communicate is formed in the valve body. A port B communicating with the upper valve cavity and a port A communicating with the lower valve cavity are formed in the side face ofthe valve body. An upper end cover is fixedly installed on the portion, at the position of an upper end opening of the upper valve cavity, of the valve body. A lower end cover is fixedly installed onthe portion, at the position of a lower end opening of the lower valve cavity, of the valve body. A rotating shaft is connected in the lower valve cavity in a rotating manner. The lower end cover is provided with a first baffle and a second baffle. The lower valve cavity is divided into a first sealed cavity and a second cavity, communicating with the port A, through the first baffle and the second baffle. A power plate extending into the first sealed cavity is arranged on the circumferential side face of the rotating shaft. A flow regulation assembly is arranged on the upper end cover. A buffer assembly is arranged in the upper valve cavity. The check valve is simple in structure, flow control can be conducted, and furthermore the valve opening can also be slowly closed.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, and in particular relates to a check valve. Background technique [0002] Check valve is a kind of valve commonly used in pipeline system. It is used to connect and check the fluid medium in the pipeline system, and is widely used in industrial equipment. The existing traditional check valve disc is prone to excessive closing speed during the process of rotating and closing around the pin shaft, resulting in The impact force of the disc sealing surface on the sealing surface of the valve seat is too large, which is easy to be damaged; at the same time, when the check valve disc is closed quickly, it is easy to generate water hammer, resulting in damage to the valve and other harmful situations; Used together with the flow valve, due to the wide variety of valves, a large installation space is required, and the traditional check valve can no longer meet the needs of the actual working con...

AI Technical Summary

Problems solved by technology

It is used to connect and check the fluid medium in the pipeline system, and is widely used in industrial equipment. The existing traditional check valve disc is prone to excessive closing speed during the process of rotating and closing around the pin shaft, resulting in The impact force of the disc sealing surface on the sealing surface of the valve seat is too large, which is easy to be damaged; at the same time, when the check valve disc is closed quickly, it is easy to generate water hammer, resulting in damage to the valve and other harmful situations; Used together with the flow valve, due to the wide variety of valves, a large installation space is required, the traditional check valve can no longer meet the needs of the actual working conditions

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