Double-sealing mechanical type bleeding valve for gas holder

Abstract

The invention discloses a double-sealing mechanical type bleeding valve for a gas holder, and the double-sealing mechanical type bleeding valve comprises a soft seal which is arranged between a valve base and a valve cover and a guide rail which is used for limiting the switching movement of the valve cover, wherein the valve base is provided with a water sealed tank which is arranged around the outer wall of the valve base for one circle and used for containing a sealing liquid; the valve cover is provided with a skirt plate which is matched with the water sealed tank and extends downward; the skirt plate is inserted into the liquid level of the water sealed tank when the valve cover is closed so that a water seal is formed; furthermore, a depth of inserting the skirt plate into the liquid level of the water sealed tank is less than a displacement formed by upwards moving the valve cover when the valve cover is opened. According to the bleeding valve, by arranging the water sealed tank and arranging the skirt plate on the valve cover, the skirt plate is inserted into the water sealed tank to form the water seal when the bleeding valve is closed, so that the water seal and the soft seal between the valve cover and the valve base form a double seal; and in addition, the depth of inserting the skirt plate into the water sealed tank is less than a distance formed by upwards moving the valve cover when the valve cover is opened, i.e., the water seal is automatically removed after the valve cover is opened. The double-sealing mechanical type bleeding valve provided by the invention is not only simple in structure but also is better in sealing performance and higher in reliability, and can be used for effectively preventing the gas in the gas holder from being leaked.

Description

technical field [0001] The invention relates to a mechanical release valve for a gas cabinet, in particular to a double-seal mechanical release valve for a gas cabinet. Background technique [0002] The gas cabinet is used to store various gas media, and the floating-top gas cabinet handles the gas in the cabinet through the up and down movement of the piston. Open the release valve to release excess gas in the cabinet. In order to ensure the safety of the gas cabinet, in addition to a set of venting devices controlled by program-controlled valves, a set of mechanical venting devices should be installed in the venting system of the gas cupboards as a backup when the program-controlled valves fail to complete the gas venting. [0003] On the premise of no program-controlled interlocking, the mechanical release device uses mechanical principles and mechanical structures to achieve the following functions: cut off the connection between the gas cabinet and the outside world wh...

AI Technical Summary

Problems solved by technology

Although the relief valve with this structure can achieve gas sealing between the gas cabinet and the outside world to a certain extent, since the sealing ring is only pressed on the valve seat under the gravity of the valve cover, the sealing ring cannot be guaranteed. Sufficient compression force, low reliability of sealing performance, gas cabinets often leak gas during operation, resulting in gas loss

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