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A valve-closing drive device and its burst pipe emergency cut-off valve

A driving device and valve closing technology, which is applied in the direction of valve device, valve operation/release device, valve fluid energy absorption device, etc., can solve problems affecting valve reliability, pipeline secondary damage, fast valve closing speed, etc. , to achieve the effect of simple and reliable structure, reliable operation and prevention of water hammer

Active Publication Date: 2018-10-30
ZHU ZHOU ZHU HUA WATER IND SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the hydraulic system circuit or circuit breaks down, it will affect the reliability of the valve, and the valve closing speed is fast, which is easy to cause valve closing water hammer, causing secondary damage to the pipeline

Method used

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  • A valve-closing drive device and its burst pipe emergency cut-off valve
  • A valve-closing drive device and its burst pipe emergency cut-off valve
  • A valve-closing drive device and its burst pipe emergency cut-off valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a squib emergency cut-off valve includes a butterfly valve 1, a flow rate detection mechanism 2, a force transmission mechanism 3 and a valve closing drive device 4;

[0035] Such as figure 2 As shown, the butterfly valve 1 includes a valve body 11 , a valve plate assembly 12 , a valve shaft 13 at the weight end, and a manual worm gear box 14 for opening the valve plate assembly 12 . The valve shaft 13 at the weight end is connected to one end of the valve plate assembly 12 , and the manual worm gear box 14 is connected to the other end of the valve plate assembly 12 through the worm gear box valve shaft (not shown).

[0036] Such as image 3 As shown, the valve closing drive device 4 includes a bracket main board 41, a weight rod 43 with a weight 42 at one end, a buffer assembly 44 arranged on the bracket main board 41, a weight rod limiting device 45 and a locking pin 46; The bracket main board 41 is connected with the valve body 11 . T...

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Abstract

The invention relates to the technical field of valve devices and discloses a valve-closure drive device and an emergency burst pipe cut-off valve thereof. The valve-closure drive device comprises a support main plate, a heavy hammer rod provided with a heavy hammer at one end, a buffer assembly, a heavy hammer rod limiting device and a locking hinge pin, wherein the buffer assembly, the heavy hammer rod limiting device and the locking hinge pin are arranged on the support main plate. The support main plate is connected with a valve body, and the other end of the heavy hammer rod is connected with a heavy hammer end valve shaft for driving valve opening or closure on the valve body. The buffer assembly is hinged to the middle of the heavy hammer rod. The heavy hammer rod limiting device is matched with the locking hinge pin and a heavy hammer rod hinge pin on the heavy hammer rod respectively to control dropping and positioning of the heavy hammer. The valve-closure drive device adopts a pure mechanism self force to drive a valve-closure action, is simple and reliable in structure, is simple and convenient to maintain, adopts the buffer assembly to control the dropping speed of the heavy hammer and prevents production of a valve-closure water hammer.

Description

technical field [0001] The invention relates to the technical field of valve equipment, in particular to a valve closing drive device and a burst pipe emergency shut-off valve thereof. Background technique [0002] In various long-distance water pipelines, pipe burst accidents may occur due to system problems or external mechanical equipment problems. If there is no emergency shut-off valve, when the pipeline bursts, a large amount of water will be released from the burst pipe, resulting in a flooding accident, which may endanger personal safety and financial losses in severe cases. At the same time, an instantaneous high vacuum is formed at the inflection point near the burst pipe due to the super large flow rate of water discharge, resulting in the instability of the negative pressure in the pipeline. Secondly, when a pipe burst accident occurs, the shut-off valve cannot be closed too quickly, otherwise it will easily cause water hammer at the valve shut-off and cause sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/00F16K17/12F16K47/02F16K31/524
CPCF16K17/12F16K31/00F16K31/52441F16K31/52458F16K47/023
Inventor 黄靖欧立涛谢爱华桂新春颜梅星唐爱华张祖华
Owner ZHU ZHOU ZHU HUA WATER IND SCI & TECH DEV CO LTD
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