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Vacuum jacket low-temperature pneumatic emergency cut-off valve

A technology of vacuum clamps and cut-off valves, which is applied in the direction of heat preservation, balance valves, valve devices, etc., which can solve the problems of weakened protection ability of the pipeline system, uneven pressure on the butt joint surface, and inability to ensure sealing accuracy, etc., to achieve heat insulation space The effect of shortening, avoiding tooth shape damage, and improving heat insulation effect

Pending Publication Date: 2022-05-17
宁波杜肯阀门制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Liquefied natural gas is a very common combustion raw material in daily life. In areas where the population is not densely populated, liquefied natural gas enters every household through filling and transmission. Nowadays, liquefied natural gas stations can carry out production and operation efficiently and safely. It is a special safety cut-off valve, that is, the low-temperature emergency cut-off valve. The low-temperature emergency cut-off valve is a very important valve part in the liquid filling machine. Because the working temperature of the low-temperature emergency cut-off valve is low, the outer side of the valve is often isolated by a vacuum sleeve. However, the output low-temperature liquid often vaporizes, causing the low-temperature liquid to flow back. After the external check valve is connected in series, it cannot be insulated through the vacuum jacket at the same time. The vaporized low-temperature liquid makes the pressure of the pipeline system continue to rise, not only It increases the installation cost, and at the same time greatly weakens the protection ability of the pipeline system
[0003] When installing the valve manually, the tightness of the connection between the valve and the pipeline is judged based on the experience of the workers, but there is a sensory error in the manual judgment, which often leads to tooth shape damage caused by too tight rotation of the connecting bolts, or insufficient pressure on the butt joint surface. Uniform, can not guarantee the accuracy of the seal

Method used

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] see Figure 1-Figure 8 , the present invention provides a technical solution: a vacuum jacket cryogenic pneumatic emergency shut-off valve, including a valve body 1, a valve core assembly is arranged inside the valve body 1, the valve core assembly blocks the valve body 1, and the valve core assembly also The pipeline is protected by pressure relief. The upper part of the valve body 1 is provided with a transmission assembly, and the upper part of the t...

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Abstract

The invention discloses a vacuum jacket low-temperature pneumatic emergency cut-off valve, and belongs to the technical field of valves. The pressure relief valve comprises a valve body, a valve element assembly is arranged in the valve body, the valve element assembly blocks the valve body, the valve element assembly further conducts pressure relief protection on a pipeline, a transmission assembly is arranged on the upper portion of the valve body, an air cylinder assembly is arranged on the upper portion of the transmission assembly, and the transmission assembly connects the valve element assembly and the air cylinder assembly. A small valve element is installed in a large valve element, a piston spring and a valve element spring are arranged in the valve element, a vacuum clamping sleeve is arranged outside the valve element and used for heat insulation between the valve element and the outside, butt joint assemblies are arranged at the input end and the output end of the valve element correspondingly, and the butt joint assemblies are used for connection between the valve element and a pipeline system. After the valve is emergently cut off, the valve is locked through the pressure of backflow liquid, pressure relief is conducted in time when the pressure of a pipeline system reaches a dangerous range, and the pipeline system is protected.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a low-temperature pneumatic emergency shut-off valve with a vacuum jacket. Background technique [0002] Liquefied natural gas is a very common combustion raw material in daily life. In areas where the population is not densely populated, liquefied natural gas enters every household through filling and transmission. Nowadays, liquefied natural gas stations can carry out production and operation efficiently and safely. It is a special safety cut-off valve, that is, the low-temperature emergency cut-off valve. The low-temperature emergency cut-off valve is a very important valve part in the liquid filling machine. Because the working temperature of the low-temperature emergency cut-off valve is low, the outer side of the valve is often isolated by a vacuum sleeve. However, the output low-temperature liquid often vaporizes, causing the low-temperature liquid to flow back. After the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/04F16K17/168F16K17/38F16K27/02F16K37/00F16L23/02F16L23/00F16L59/065
CPCF16K17/048F16K17/168F16K17/383F16K27/02F16K37/0016F16L23/02F16L23/006F16L59/065
Inventor 陈磊
Owner 宁波杜肯阀门制造有限公司
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