Filler internal pressure self-sealing valve capable of forming self-energizing seal

Abstract

The invention discloses a filler internal pressure self-sealing valve capable of forming a self-energizing seal. The filler internal pressure self-sealing valve comprises a valve body, a filling box and a valve rod, wherein the filling box is provided with a filler compaction mechanism; the valve rod is sleeved with a support ring, a filling pad and filler in turn; the filler and the filling pad are contacted with each other; the end face of the filling pad facing the filler is a convex first V-shaped face; the end face of the filler facing the filling pad is a concave second V-shaped face; an inclined angle between two bevels of the first V-shaped face is larger than an inclined angle between two bevels of the second V-shaped face; and the support ring is a support loop with holes. Engaged V-shaped faces are formed between the filler and the filling pad of the self-sealing valve, so that the valve can be deformed under the action of pressure to form a reliable self-energizing seal, and the sealing performance of the valve is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of valve manufacturing, and relates to a valve used in complex working conditions such as high-pressure hydrogen-facing devices and high-sulfur natural gas field gathering and transportation projects, including various valves such as wedge gate valves, globe valves, and flat gate valves. The utility model relates to a stuffing internal pressure sealing valve capable of forming self-tight sealing. Background technique [0002] The valves used in complex working conditions such as high-pressure hydrogen treatment devices and high-sulfur natural gas field gathering and transportation projects, that is, wedge gate valves, globe valves, check valves, flat gate valves, etc., are made of stuffing boxes, sealing rings, compression rings , The internal pressure self-sealing structure composed of four open rings, the packing pad in the internal pressure self-sealing structure is in contact with the packing plane, unde...

AI Technical Summary

Problems solved by technology

[0002] The valves used in complex working conditions such as high-pressure hydrogen treatment devices and high-sulfur natural gas field gathering and transportation projects, that is, wedge gate valves, globe valves, check valves, flat gate valves, etc. , The internal pressure self-sealing structure composed of four open rings, the packing pad in the internal pressure self-sealing structure is in contact with the packing plane, under the action of the medium, the packing pad, the valve stem and the packing cannot form a self-tight seal, causing the valve The sealing effect of the packing is not good, which may easily cause safety accidents and hazards

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