Control valve with double-sealing structure

Abstract

The invention discloses a control valve with a double-sealing structure, which comprises a valve body, a control module is installed at the top end of the valve body, a water inlet pipe is fixedly installed on one side of the valve body, and a drainage pipe is connected to the other side of the valve body. According to the control valve with the double-sealing structure provided by the invention, when the control module drives a valve rod and a valve element to open and close the valve, the valve rod can ascend and descend, a connecting rod drives a pull rod to ascend and descend, and the pull rod can drive the sealed door body to ascend and descend, so that a water conveying end of a sealing box shell is opened or closed, thus the joint of the valve body and the drainage pipe is closed; and in cooperation with the valve element, the device is of a double-layer sealing structure, the sealing effect of the device is improved, the situation that the valve body cannot be closed due to the fact that a valve seat cannot be sealed when the valve element breaks down is avoided, impurities in liquid can be filtered out through the sealing box shell and a filter screen installed at the drainage pipe, the device has the filtering effect, and the device is suitable for operation in more environments.

Description

technical field [0001] The invention relates to the technical field of valve equipment, in particular to a control valve with a double sealing structure. Background technique [0002] Valves are produced with the generation of fluid pipelines. Humans have used valves for nearly 4,000 years. In ancient China, wooden plug valves were used in bamboo pipelines when they sucked brine from salt wells to make salt. , The valve is used to open and close the pipeline, control the flow direction, adjust and control the pipeline accessories of the parameters of the conveying medium. According to its function, it can be divided into shut-off valves, check valves, regulating valves, etc. Valves are the main components in the fluid conveying system. Control components, with the functions of cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief, etc., are used in the valves of fluid control systems, from the simples...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the existing control valve, usually through the control assembly, the control valve stem drives the valve core to move up and down, so as to seal and close the valve seat with the output end, but when the valve core is damaged, It is impossible to seal the output end of the valve seat, and it is easy to cause the valve to fail to close, and it does not have the disadvantage of a better and more stable sealing method. A control valve with a double sealing structure is proposed

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