Earthquake disaster gas pipeline shutoff valve

Abstract

The invention provides an earthquake disaster gas pipeline shutoff valve. The earthquake disaster gas pipeline shutoff valve is mainly used for shutting off a gas pipeline valve body when an earthquake disaster occurs, is simple in structure, low in manufacturing cost and convenient to repair and maintain and is mainly composed of an upper gravity ball, a connecting rod A, a lower gravity ball, a connecting rod B, an ejector rod, a fixed ball, a baffle, a shaft sleeve, a butterfly valve rotary shaft and a butterfly valve body. The main working principle of the earthquake disaster gas pipeline shutoff valve is that the ejector rod is firstly mounted to enable a lower groove of the ejector rod to abut against the upper spherical surface of the fixed ball and meanwhile to enable an upper groove of the ejector rod to abut against the lower spherical surface of the fixed ball; when an earthquake occurs, the ejector rod can only fall towards the ground; the lower gravity ball counterclockwise rotates due the gravity effect and stops rotating after the spherical surfaces of the lower gravity ball collide the baffle; the butterfly valve body is just closed; the lower gravity ball can have certain clockwise resilience after colliding the baffle; and since a dead section exists, the resilience cannot drive the butterfly valve rotary shaft of the butterfly valve body to rotate, and closing of the butterfly valve body is not affected.

Description

Technical field [0001] The invention is mainly used for closing gas pipeline valves when earthquake disasters occur. Background technique [0002] At present, the mechanical shut-off valves for gas pipelines related to earthquake disasters that have been applied for or have been authorized are very complicated, high manufacturing costs, and inconvenient maintenance and maintenance. Summary of the invention [0003] The present invention overcomes the above-mentioned defects. It has simple structure, low manufacturing cost, convenient repair and maintenance. It is mainly composed of upper gravity ball (1), connecting rod A (2), lower gravity ball (3), and connecting rod B (4). , Mandrel (5), fixed ball (6), baffle (7), shaft sleeve (8), butterfly valve shaft (9), butterfly valve (10); the upper end of connecting rod A (2) and the gravity ball (1) ) Fixed, the lower end of connecting rod A (2) is fixed to the shaft sleeve (8), the left end of connecting rod B (4) is fixed to the lo...

AI Technical Summary

Problems solved by technology

[0002] At present, the closed valves for mechanical earthquake disaster gas pipelines that have been applied for or authorized are very complicated, with high manufacturing costs and inconvenient repair and maintenance.

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