Normally closed pneumatic pipe clamp

Abstract

In order to ensure the technological process safety, a switch valve for an energy-containing liquid material conveying pipeline reduces the force stimulating effect as much as possible during valve core action, and a pipe clamp valve is generally selected. For the common pipe clamp valve, a sleeve is arranged inside a valve body, and the conditions of sleeve abrasion degree and whether the leakage exists or not are difficult to be directly observed, so that certain potential safety hazard exists when energy-containing liquid materials are conveyed. For the existing pipe clamp valve, under the unexpected conditions such as driving force loss (such power supply or gas source cutting off), the valve opening state is difficult to determine, and the accident occurrence can be caused. The invention provides a normally closed pneumatic pipe clamp tightly locked by the spring force, and solves the problems. The normally closed pneumatic pipe clamp comprises slide sleeves (1), guide shafts (2), a connecting plate (3), a case (4), regulating pins (5), springs (6), an air cylinder (7), an air cylinder installing plate (8), press heads (9) and position limiting sleeves (10).

Description

technical field [0001] The invention belongs to the field of automatic control of propellant and explosive technology, and relates to a pneumatic pipe clamp used for the transportation control of energetic liquid materials. Background technique [0002] The on-off control of energetic liquid material pipeline transportation has strict requirements on safety. On the one hand, it is required that when the valve core is in motion, the force stimulus generated by the energetic liquid material should be as small as possible, so the pinch valve is generally used; Cut off) can maintain a definite opening and closing state, for example: when using pipelines to transport nitroglycerin for feeding, it is hoped that in an unexpected situation, the switch valve will remain closed to stop nitroglycerin feeding, so as to detect faults and avoid further expansion of danger; for vacuum pumping The opening and closing control of the pipeline (the pipeline contains energetic liquid material ...

AI Technical Summary

Problems solved by technology

Commonly used pinch valves have certain potential safety hazards when used for the transportation of energetic liquid materials because the casing is arranged inside the valve body, and it is difficult to visually observe the wear degree of the casing and whether there is leakage. When the pinch valve loses its driving force, it is difficult to determine the opening and closing state of the valve, which may lead to accidents

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