Check valve for vapor recovery

Abstract

The present invention discloses a check valve for vapor recovery. The check valve comprises a valve body, a first coupling end, a second coupling end, a valve disc, a valve seat, and a valve cover. The first coupling end is formed on one side of the valve body, and the second coupling end is formed on the other side of the valve body. The valve disc is fixedly arranged within the valve body in a position where a first passage and a second passage communicate with each other. The valve seat is formed on one side of the valve body in a position parallel to the valve disc. A valve rod is nested in an opening of the valve seat. A baffle plate is fixedly arranged at one end of the valve rod, and a limiting plate is fixedly arranged at the other end of the valve rod. An outer side of the valve seat is fixedly connected with the valve cover through a bolt, and a spring is fixedly arranged in the middle of an inner side of the valve cover. With the spring arranged between the limiting plate ofthe valve rod and the valve cover, the impact force on the baffle plate after being impacted by airflow can be buffered by the spring, thereby preventing the impacted valve rod from deformation. In short, the check valve for vapor recovery is simple and practical.

Description

technical field [0001] The invention relates to the technical field of check valves, in particular to a steam recovery check valve. Background technique [0002] For a long time, in most industries, the used waste heat steam is used as supplementary water for heating boilers for energy recovery; part of the waste heat steam that cannot be recovered can only be turned into greenhouse gas emissions, resulting in waste of energy and increased costs . Direct recovery of waste heat steam can improve thermal efficiency and has no greenhouse gas emissions; however, most of the existing steam recovery equipment is a reciprocating plunger pump (or piston machine), which needs to be equipped with a check valve to prevent backflow of steam during use. The check valve follows the pulse working frequency of the reciprocating plunger pump, and is pulsed to open and close. [0003] The check valves used in the prior art steam recovery process have the following problems: [0004] 1. Aft...

AI Technical Summary

Problems solved by technology

[0004] 1. After being impacted by a large air flow, the fluctuation is large, resulting in rapid and severe deformation of the valve stem inside the valve body, which is easy to cause damage to the valve stem

[0005] 2. Setting a damping channel in the connecting pipe inside the valve body affects the normal circulation of steam, resulting in an increase in the local pressure inside the pipe and affecting its service life

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