A normally closed one-way explosion-proof valve

Abstract

The invention discloses a normally-closed type one-way explosive-proof valve. The valve is characterized by comprising a bonnet, a valve clack, a valve body and a pipe flange; the bonnet is connected to the upper part of the valve body through a shaft; the action of the valve clack is controlled by the air volume of a downstream fan of dust removing equipment; when the fan starts working, the valve clack can be opened slowly, and the medium transfer state can be reached after running for a period; when the fan stops running, the valve clack is automatically closed under the effect of gravity and is attached to the inclined surface of the pipe flange, mechanical sealing is formed, and the medium transfer is cut off; and when an explosion occurs, the valve clack is closed under the effect of an impact wave. With the valve, when the downstream dust removing equipment explodes, the transfer pipeline can be cut off quickly, the explosion source of the dust removing equipment with front-end accessory equipment through an inlet pipeline is disconnected, and the explosion is isolated in a certain area, so that the explosion loss is limited in the controllable range.

Description

technical field [0001] The invention relates to the dust explosion-proof field of dust removal equipment, in particular to a normally closed one-way explosion-proof valve. Background technique [0002] With the development of the national economy, more and more attention has been paid to dust explosion protection. Several major dust explosion accidents have occurred in our country, causing heavy casualties and property losses. Most of the dust inlet pipelines on the existing dust removal equipment have no explosion isolation device during transportation. Once the dust explodes, it will not be able to isolate the explosion shock wave and flame propagation. [0003] With the development of the national economy, more and more attention has been paid to dust explosion protection, and some dust removal equipment has emerged as the times require. However, the dust inlet pipes on most of the existing dust removal equipment have no explosion isolation device during transmission. On...

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Problems solved by technology

[0004] The purpose of the present invention is: to overcome the deficiencies in the prior art, to solve the problem that the dust explosion in the prior art will not be able to cut off the propagation of the explosion shock wave and flame, and to provide a normally closed one-way explosion-proof valve, which can be used when the downstream When the dust removal equipment explodes, the transmission pipeline can be cut off quickly, and the explosion source of the dust removal equipment can be cut off through the connection between the inlet pipe and the front-end auxiliary equipment, and the explosion can be isolated in a certain area, so that the explosion loss can be limited within a controllable range.

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