Stop valve

Abstract

The invention relates to a stop valve. The stop valve comprises a valve body, and the upper top of the valve body is connected with a liquid inlet; a liquid outlet is formed opposite to the liquid inlet, and the top ends of the liquid inlet and the liquid outlet are provided with reinforcing plates; the reinforcing plates are provided with installing holes; the communicating position of the liquidinlet and the liquid outlet is provided with a buffering plate which is provided with small holes; the small holes are connected with a filter screen; the upper side of the liquid inlet is connectedwith a hole frame which is provided with a communicating hole; the communicating hole is provided with a silencer; the top of the hole frame is connected with a flexible graphite sealing ring which isconnected with a filler cavity; the lower end of the filler cavity is connected with a plunger; a sealing ring is arranged at the bottom of the plunger and is connected with a buffering device; the upper end of the filler cavity is connected with a valve rod, a spacer is used for isolation, and the two ends of the bottom of the valve rod are provided with limiting pins; a column nut is used for fixing, and the upper side of the valve rod is connected with an inlet of a valve deck; an abrasion-resistant plate is welded to the inlet of the valve deck and is provided with an O-shaped sealing ring; and the abrasion-resistant plate is connected with a cap nut. The stop valve is good in sealing performance, high in anti-impacting force, good in buffering performance, high in stability, resistant to abrasion, corrosion-proof and resistant to high temperature, and long in service life.

Description

technical field [0001] The invention specifically relates to a shut-off valve. Background technique [0002] The globe valve, also known as the gate valve, is a forced sealing valve, which has high requirements for sealing effect. Due to the extensive use of globe valves in industrial production, life, marine transportation, etc., high temperature resistance, corrosion resistance and impact resistance are required, but now Globe valves in some technical productions cannot meet a large number of existing requirements. Long-term use reduces sealing performance, pressure resistance and wear resistance, resulting in reduced structural stability and shortened service life, so improvements are needed. Contents of the invention [0003] The object of the present invention is a stop valve to solve the existing technical problems. [0004] In order to achieve the above object, the present invention provides the following technical solutions: a stop valve, including a valve body, t...

AI Technical Summary

Problems solved by technology

[0002] The globe valve, also known as the gate valve, is a forced sealing valve, which has high requirements for sealing effect. Due to the extensive use of globe valves in industrial production, life, marine transportation, etc., high temperature resistance, corrosion resistance and impact resistance are required, but now The stop valves in the production of some technologies cannot meet a large number of existing requirements. Long-term use reduces the sealing performance, pressure resistance and wear resistance, resulting in a decrease in structural stability and shortening the service life, so it needs to be improved.

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