Emptying stop valve provided with noise reduction labyrinth sleeve

Abstract

The invention discloses an emptying stop valve provided with a noise reduction labyrinth sleeve. The emptying stop valve is characterized in that a medium input channel is arranged on one side of a valve body; a medium output channel is arranged on the other side of the valve body in a manner of corresponding to the medium input channel; a cavity is formed in the middle of the valve body; a valveelement and a pressure setting rod are arranged in the cavity; the pressure setting rod is connected with the valve element; the medium input channel is connected with the lower end face of the cavity; the medium output channel is connected with the side end face of the cavity; the valve element is matched with the connecting end face of the medium input channel and the cavity through the pressuresetting rod; the noise reduction labyrinth sleeve is further arranged in the cavity; the valve element and the pressure setting rod are arranged in the noise reduction labyrinth sleeve; and after theinput medium pressure of the medium input channel exceeds the setting pressure of the pressure setting rod, the valve element is pressed to be lifted upwards, a medium enters the noise reduction labyrinth sleeve and is guided out into the cavity through the noise reduction labyrinth sleeve, and the medium is discharged through the medium output channel for pressure relief.

Description

technical field [0001] The invention relates to a shut-off valve, in particular to a vent shut-off valve provided with a muffler labyrinth sleeve. Background technique [0002] At present, the existing steam vent valves basically rely on imported products, most of which have porous or labyrinth sleeve valve structures, self-sealing bonnets, integrated valve seats and valve bodies, and pilot spool structures. Because it is used for ultra-high pressure differential venting, only multi-layer porous sleeve structures can be used to meet the requirements of high pressure differential use. There are also labyrinth sleeve structures, but due to the poor design of the connection with the stuffing box, many labyrinths The sleeves are integrated with the valve seat, and are connected with the valve seat by lengthening screws, and the screws are subject to high medium pressure. Valves appear in people's lives and workplaces all the time, and are an indispensable part of social develop...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the noise of the current air defense stop valve is very large, and the noise caused by it can be eliminated in many ways in some specific fields, but the cost of some additional noise reduction equipment is high, which is not conducive to large-scale use. This application The purpose of the document is to provide a vent stop valve with a sound-absorbing labyrinth sleeve to solve the above-mentioned problems

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