A kind of rapid cut-off device for liquid conveying pipeline

Abstract

The invention discloses a quick cutoff device of a liquid conveying pipe, and relates to a pipe cutoff device. A through hole (17) of a movable valve rod (19) inserted in a pipe hole (4) of a valve pipe (26) corresponds to pipe holes of a connecting pipe A (2) and a connecting pipe B (9) or blocks the pipe holes; the two ends of a spring (10) sleeving the movable valve rod eject against one end ofthe valve pipe and opposite surfaces of a diameter expanding ring (20); a control rod (14) is inserted in a blind hole (16); corresponding chutes (28) are formed in the upper and lower surfaces of the control rod; slide pieces (15.1) on opposite surfaces of a cylinder (15) inserted in upper and lower ports of a through hole (22) control two cylinder outer ends to clamp on the end surface of the other end of the valve pipe or to shrink into the through hole through the depth control of the two chutes; and a pull rope (6) is arranged at the outer end of the control rod. When a pipe joint is loosened or the pipe is burst, the pull rope is pulled to drive the movable valve rod to quickly close the pipe through the acting force of the spring.

Description

technical field [0001] The present invention relates to a pipeline cut-off device, in particular to a quick cut-off device for a liquid conveying pipeline. Background technique [0002] It is known that in industrial equipment, pipelines are the main carrier for transporting liquids. The existing control method is to install valves on pipelines to control flow and stop flow. Due to pipeline quality, pipeline aging or excessive pressure, etc., often In the event of loose pipe joints or pipe bursts, maintenance personnel cannot approach and close the valve due to the extremely high pressure of the liquid being transported, resulting in a large waste of raw materials. Contents of the invention [0003] In order to overcome the deficiencies in the background technology, the present invention discloses a quick shut-off device for liquid conveying pipelines. When the pipeline interface becomes loose or the pipeline bursts, pulling the pull rope can drive the moving valve stem to...

AI Technical Summary

Problems solved by technology

[0002] It is known that in industrial equipment, pipelines are the main carrier for transporting liquids. The existing control method is to install valves on pipelines to control flow and stop flow. Due to pipeline quality, pipeline aging or excessive pressure, etc., often In the event of loose pipe joints or pipe bursts, maintenance personnel cannot approach and close the valve due to the extremely high pressure of the liquid being transported, resulting in a large waste of raw materials

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