Emergency cut-off valve for water conveying pipeline

Abstract

The invention relates to the technical field of remote water delivery equipment, and discloses an emergency cut-off valve for a water delivery pipeline, the emergency cut-off valve comprises a valve body, a middle column is fixedly mounted in the valve body, a V-shaped nozzle is fixedly mounted in the center of the right part of the middle column, a rubber water bag is movably mounted in the V-shaped nozzle, and the left end of the rubber water bag is fixedly connected with a water pipe; a fixed box is fixedly installed above the valve body, a cut-off plate is movably installed in the fixed box, and the cut-off plate is movably connected with the valve body. Through the arrangement of the rubber water bag and the cut-off plate, when the internal transmission pressure of the valve body is too large, water is slowly filled into the rubber water bag, the rubber water bag is gradually expanded, a channel of the valve body is gradually closed, the water transmission amount is reduced, the water hammer effect caused by rapid cut-off is avoided, the channel of the valve body is slowly closed, and negative pressure of a subsequent transmission pipeline is avoided; and a vacuum effect occurs, and the transmission pipeline is effectively protected.

Description

technical field [0001] The invention relates to the technical field of remote water delivery equipment, in particular to an emergency shut-off valve for a water delivery pipeline. Background technique [0002] In various long-distance water pipelines, due to the system's own problems or external mechanical equipment problems, the internal pressure of the pipeline increases, and a pipe burst accident may occur. If there is no emergency shut-off valve, when the pipeline bursts, the pipe burst A large amount of water discharge will lead to flooding accidents, which may endanger personal safety and financial losses in severe cases. At present, emergency shut-off valves are often used to cut off pipelines urgently, but there are some shortcomings in existing emergency shut-off valves, as follows: [0003] In the event of a pipe burst in the transportation pipeline, a high vacuum is formed at the inflection point near the burst pipe due to the super-large flow of water discharge, ...

AI Technical Summary

Problems solved by technology

[0002] In various long-distance water pipelines, due to the system's own problems or external mechanical equipment problems, the internal pressure of the pipeline increases, and a pipe burst accident may occur. If there is no emergency shut-off valve, when the pipeline bursts, the pipe burst A large amount of water discharge will lead to flooding accidents, which may endanger personal safety and financial losses in serious cases. At present, emergency shut-off valves are often used to cut off pipelines urgently, but there are some shortcomings in existing emergency shut-off valves, as follows:

[0003] If a pipe burst occurs in the transportation pipeline, a high vacuum will be formed at the inflection point near the burst pipe due to the large flow of water discharge, resulting in the instability of the negative pressure in the pipeline. Moreover, when the pipe burst accident occurs, the shut-off valve is closed too quickly, which is likely to cause The water hammer effect causes secondary damage to the pipeline. Most of the shut-off valves currently used are hydraulically driven or electrically driven. accident

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