EXPLOSION-PROOF VALVE FOR PROCESS EQUIPMENT Russian patent published in 2013 - IPC F16K17/40 F16K17/16 F16K17/12 

FIELD: machine building.

SUBSTANCE: explosion-proof valve includes a valve body, a gate valve, heat-insulating and blast elements, and a lined load gate valve. The latter is connected in a movable manner to the valve body by means of at least three elastic flexible links, for example in the form of elastic belts. One end of belts is hinged to the valve body, and the other one is hinged to the load gate valve. In lower cylindrical part there arranged is a lined load gate valve covering a hole made in the body of the protected object. In upper cylindrical part of the valve body there arranged is a heat-insulating element and a sealing membrane pressed to the valve body by means of a cover plate. The latter is hinged to a lever interacting with a baffle plate. An attachment assembly of the blast element is fixed with its upper part on the lever and with its lower part on upper cylindrical part of the valve body. The blast element consists of a wire, a stop bolt, a fork, a lever of the valve cover plate, a nut, two pulleys located in the lever fork of the valve cover plate, and in the fork of upper cylindrical part of the valve body. Heat-insulating element is made in the form of mineral wool, asbestos chips or other heat-resistant porous material laid in a basket made of metal rods or straps in the form of at least three heat-resistant covers filled with heat-resistant porous material and connected to the basket through elastic links, the length of which exceeds height of the whole explosion-proof valve. Elastic flexible links in the form of elastic belts are layered and have alternation of elastic and damping layers. Vibration damping paste, for example of VD-17, type is used as damping layers, and elastomer, for example polyurethane is used as elastic layers.

EFFECT: improving protection efficiency of process equipment against explosions by increasing quick action and reliability of actuation.

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