Valve rod retreating prevention device for high-pressure valve

Abstract

The invention discloses a valve rod retreating prevention device for a high-pressure valve. The device comprises a valve body, a valve rod, a hand wheel, a mounting bar, a connection insertion block,a placing sleeve, a screw, a cylinder, a spring, a strip groove, a rubber head cover, a disc, a circular sleeve, a movable round rod, a first rubber sleeve, a connecting bar, a limiting groove, a through groove, a slot, a second rubber sleeve, an L-shaped groove, a sealing ring, an annular oil storage tank, a fine hole, a fixed pipe, a rubber bar, a connecting cylinder and a ball. The device is reasonable in structure; through an extension structure, the movable round rod can be lifted in the vertical direction; when the valve body is closed, the movable round rod can be inserted in the limiting groove of the hand wheel to prevent rotation of the hand wheel by external force; meanwhile, through arrangement of the bolt, the hand wheel can be limited; when the movable round rod is lifted, only the connecting bar slides in the strip groove and the L-shaped groove; and after the movable round rod is collected into the cylinder, the connecting bar moves to the tail end of the L-shaped groove, and the connecting bar can be stopped, so that the operation is simple.

Description

technical field [0001] The invention relates to a valve stem anti-retraction device, in particular to a valve stem anti-retraction device for a high-pressure valve, belonging to the technical field of valve anti-retraction applications. Background technique [0002] A valve is a control component in a fluid delivery system, with functions such as cut-off, regulation, flow diversion, reverse flow prevention, pressure stabilization, diversion or overflow pressure relief; valves used in fluid control systems range from the simplest cut-off valve to extremely complex There are various types and specifications of valves used in the automatic control system. [0003] The high-pressure valve is a kind of valve; when the high-pressure valve is in use, it is exposed to the outside world, and non-operators may turn it wrong, or the pressure is too high, causing the valve stem to retreat, which may cause the outflow of the medium, and the valve stem may There will be a lack of blockin...

AI Technical Summary

Problems solved by technology

[0003] The high-pressure valve is a kind of valve; when the high-pressure valve is in use, it is exposed to the outside world, and non-operators may turn it wrong, or the pressure is too high, causing the valve stem to retreat, which may cause the outflow of the medium, and the valve stem may There will be a lack of blocking, and the handwheel connected to the valve stem may lack a limit

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