Sealing valve with double valve plates

Abstract

The invention relates to a sealing valve with double valve plates, which comprises a left valve body, a middle valve body, a right valve body, a left valve plate, a right valve plate and a valve plate linkage mechanism, wherein the left valve body and the right valve body are respectively in sealing connection with the middle valve body; a sealing ring is arranged between the left valve plate and a medium inlet on a left valve body as well as the right valve plate and a medium outlet on the right valve body; and the valve plate linkage mechanism is respectively hinged with the left valve plate and the right valve plate. The sealing valve with double valve plates has the advantages as follows: (1), the valve structure is simple and compact; (2), the operation is convenient; (3), no leakage of poison gas when opening or closing the valve guarantees the safety of workers; (4), the closing effect of the valve is better, and the other valve plate supplies the guarantee in case that one valve plate leaks the gas; (5), the valve can replace existing various blind valves, butterfly valves, ball valves and sluice valves, and so on; and (6), the jacking press function of the valve plate linkage mechanism results in tighter closing and better sealing of the valve.

Description

technical field [0001] The invention relates to a double valve plate sealing valve, which is used to replace the existing blind plate valve, and can also be used to replace butterfly valves, gate valves, ball valves and the like. Background technique [0002] Blind plate valves are mainly used in pipelines for flammable and explosive media. The existing blind plate valves include a blind plate rotating mechanism and a blind plate clamping and releasing mechanism. The above two mechanisms are quite complicated and bulky. In addition, this blind valve has the following disadvantages: [0003] (1) To use this kind of blind valve, a butterfly valve of the same size as the blind valve needs to be configured at the front end of the inlet, and a stretch tube (bellows) needs to be configured at the rear end of the outlet, which is too expensive. [0004] (2) The operation is complicated. When opening and closing the valve, the butterfly valve at the front end of the air inlet must...

AI Technical Summary

Problems solved by technology

[0002] Blind plate valves are mainly used in pipelines for flammable and explosive media. The existing blind plate valves include a blind plate rotating mechanism and a blind plate clamping and releasing mechanism. The above two mechanisms are quite complicated and bulky. In addition, this blind valve has the following disadvantages:

[0003] (1) To use this blind valve, a butterfly valve of the same size as the blind valve needs to be configured at the front end of the inlet, and a telescopic tube (bellows) needs to be configured at the rear end of the outlet, which is too expensive

[0004] (2) The operation is complicated. When opening and closing the valve, the butterfly valve at the front end of the air inlet must be closed first. After the left and right valve bodies are separated, the blind plate is turned to its position, and then the two valve bodies are used to clamp the blind plate.

[0005] (3) The working environment of the operator is dangerous. Although the butterfly valve at the air inlet end is closed first during operation, when the right and left valve bodies are separated, the poisonous gas in the pipeline will be distributed in the surrounding environment, and the poisonous gas must be removed in time. equipment, and instruments are needed to detect the residue of poisonous gas

[0006] (4) Pollution of the environment, even if the poisonous gas is removed at the work site, there is still a certain amount of poisonous gas in the atmosphere

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