Low-temperature emergency release coupler

Abstract

The invention discloses a low-temperature emergency release coupler. The low-temperature emergency release coupler comprises coupler bodies. A hoop is arranged on the coupler bodies. A release mechanism is arranged at one end of the hoop. The low-temperature emergency release coupler has the beneficial effects that the novel low-temperature emergency release coupler provided with the hoop release mechanism is provided, the first valve body and the second valve body are well fixed to each other, unnecessary release of the emergency release coupler can be avoided through the hoop, the release difficulty is avoided, safety release and security are achieved, the stress is concentrated, release is sensitive, rapid and effective, the disengaged hoop cannot generate potential safety hazards after release, a seal action is rapidly conducted, and leakage of a low-temperature medium is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a low temperature breakaway valve. Background technique [0002] When loading and unloading ultra-low temperature fluids such as LNG on tank trucks, cryogenic fluid loading and unloading arms are basically used. In order to ensure that the tank truck can immediately and safely drive away from the dangerous area in emergency situations such as low-temperature medium leakage and improper loading and unloading operations, the outer arm of the loading and unloading arm generally has Install cryogenic breakaway valves. [0003] Chinese patent application document CN104696564A discloses a low-temperature breaking valve, including a valve body and a valve disc. The breaking groove divides the valve body into a left valve body and a right valve body; The first sealing surface is formed on the inner end wall of the valve cavity, the second sealing surface is formed on the inner end wall o...

AI Technical Summary

Problems solved by technology

[0005] 1) The breaking force of the breaking bolt is limited by the actual application scene and cannot be set too high. The breaking force of the breaking valve of the internationally renowned brand KLAW in the UK is only 20KN, and the loading and unloading arm is subjected to bumps during transportation and some actual improper operations In the process, the breaking bolts may be damaged by force, causing the breaking valve to break unnecessarily, causing unnecessary trouble to the actual loading and unloading operations;

[0006] 2) During loading and unloading operations, the low temperature medium in the low temperature breakaway valve will cause the water vapor in the surrounding air to condense and freeze to cover the surface of the valve body, and the immobilization effect of the frost layer will make the actual breaking force greater than the design breaking force of the breaking bolt , resulting in some emergency pull-off valves not being able to pull off smoothly, causing serious safety hazards

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