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Emergency cut-off valve at bottom of built-in tank in low-temperature liquid storage tank

A low-temperature liquid, shut-off valve technology, applied in the direction of lift valve, valve details, valve device, etc., can solve problems such as safety hazards, liquid leakage, safety accidents, etc., achieve reasonable structure, reduce valve opening torque, and zero leakage sealing performance Effect

Active Publication Date: 2013-02-13
HANGZHOU HANGYANG KOSO PUMP & VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the event of emergency leakage of large cryogenic liquid storage tank pipelines, if there is no emergency shutdown measure, a large amount of liquid will leak out, which may easily lead to safety accidents
The current practice in the industry is to add an emergency cut-off valve to the output pipeline. The disadvantage of this is: if the pipeline fails, the valve will be cut off, and part of the liquid will remain between the storage tank and the cut-off valve, which will increase the cold loss and have safety hazards. hidden dangers; moreover, if the rupture occurs between the shut-off valve and the storage tank, it is impossible to effectively cut off the liquid leakage urgently

Method used

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  • Emergency cut-off valve at bottom of built-in tank in low-temperature liquid storage tank
  • Emergency cut-off valve at bottom of built-in tank in low-temperature liquid storage tank
  • Emergency cut-off valve at bottom of built-in tank in low-temperature liquid storage tank

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Effect test

Embodiment

[0018] Embodiment: The built-in tank bottom emergency shut-off valve of the present invention is a special valve for large cryogenic liquid storage tanks. The valve is divided into two parts: main valve and drive.

[0019] The main valve part 1 is mainly composed of bottom plate, valve seat, guide frame, large and small valve discs, valve disc cover, guide frame cover, guide rod, etc. (see figure 2 ). The small disc and the large disc form a sealing pair, and the large disc and the valve seat form a sealing pair. The small disc can move up and down in the large disc and is guided by a guide rod; the large disc can move up and down in the guide frame. sports.

[0020] The driving part 2 is mainly composed of an actuator (with a spring inside), a piston rod, a transmission pin, an upper valve stem, a guide block, a connecting pipe, a protective cover, and an air inlet and outlet, etc. (see image 3 ). The bottom plate in the main valve part is welded to the bottom of the liq...

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PUM

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Abstract

Disclosed is an emergency cut-off valve of at the bottom of a built-in tank in a low-temperature liquid storage tank. The emergency cut-off valve mainly comprises a main valve portion and a driving portion, the main valve portion is welded to the bottom of the low-temperature liquid storage tank through a bottom plate; the driving portion is placed at the top of the low-temperature liquid storage tank, and the main valve portion and the driving portion are connected through two stainless steel ropes, wherein one rope is a work rope, and the other rope is an emergency rope; a valve seat is fixed on the bottom plate of the main valve portion and connected with a guide frame, and a large valve clack which is capable of vertically moving and is matched with the valve seat to form a large sealing pair is built in the guide frame; and a small valve clack which is capable of vertically moving and is matched with a centre valve hole of the large valve clack to form a small sealing pair is arranged above the large valve clack through a valve rod. Compared with ordinary emergency cut-off valves, the emergency cut-off valve is small in executing mechanism, reasonable and compact in structure and good in using effects.

Description

technical field [0001] The invention relates to an emergency shut-off valve with a built-in tank bottom in a low-temperature liquid storage tank, which belongs to low-temperature mechanical equipment. Background technique [0002] In the event of emergency leakage of large cryogenic liquid storage tank pipelines, if there is no emergency shutdown measure, a large amount of liquid will leak out, which will easily lead to safety accidents. The current practice in the industry is to add an emergency cut-off valve to the output pipeline. The disadvantage of this is: if the pipeline fails, the valve will be cut off, and part of the liquid will remain between the storage tank and the cut-off valve, which will increase the cold loss and have safety hazards. hidden danger; moreover, if it is torn between the shut-off valve and the storage tank, it is impossible to effectively cut off the leakage of liquid urgently. Contents of the invention [0003] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/44F16K1/52F16K31/44F16K31/122
Inventor 胡赟张幼军
Owner HANGZHOU HANGYANG KOSO PUMP & VALVE
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