A low temperature connector

Abstract

The invention discloses a low-temperature connector. The low-temperature connector comprises a movable head and a fixed head, wherein the movable head is connected to the fixed head. The movable head comprises a first outer shell and a first inner shell. The first outer shell comprises a thick first outer shell cylinder body, a first outer corrugated pipe, a thin first outer shell cylinder body and a first butt joint flange. The first inner shell comprises a first inner shell body, a first inner corrugated pipe and a first inner sealing head. A guide column is also arranged inside the inner shell. The fixed head comprises a second outer shell and a second inner shell. The second outer shell comprises a thick second outer shell cylinder body, a second outer corrugated pipe, a thin second outer shell cylinder body and a second butt joint flange. The second inner shell comprises a second inner shell body and a second inner sealing head. The first inner sealing head is connected to the second inner sealing head and both are sealed. The first butt joint flange is connected to the second butt joint flange and both are sealed. After the low-temperature connector contracts when cooled, automatic compensation sealing at a connecting part can be realized, and after long-time working, the butt joint surface does not get frozen.

Description

technical field [0001] The invention relates to the technical field of connector design, in particular to a low-temperature connector. Background technique [0002] Cryogenic connectors are mainly used for the connection between low-temperature medium tanks, low-temperature storage tanks of launch vehicles and other equipment and low-temperature medium transportation and discharge pipelines. There are three main problems that need to be solved: the sealing surface is not tightly sealed due to the shrinkage of the material when it is cold , Working for a long time, the butt joint surface freezes and is not easy to separate and disassemble, and the product is lightweight. [0003] Civil low-temperature pipeline connections usually use flanges and claw-type quick connectors. After the flanges or claw-type quick connectors are tightened, the shrinkage of the material in the low-temperature medium environment will cause the sealing surface to be poorly sealed. There will be a lo...

AI Technical Summary

Problems solved by technology

[0005] Wrapping type: The traditional solution is to wrap a layer of heat insulating material on the periphery, and provide locking force through the air supply of the cylinder on the connector to keep the locking and sealing after being cold. This solution ensures that the cylinder part does not knot Ice, but still can not guarantee that the docking surface will not freeze, there is a hidden danger that the ice will not be removed after a long time of work

[0006] Vacuum insulation type: A new generation of launch vehicles adopts a vacuum insulation type low-temperature connector solution, which effectively solves the problem of icing on the docking surface, but the entire vacuum structure is very complicated and heavy, and requires a supporting suspension device, which is difficult to operate and expensive. Moreover, there is a problem of the validity period of the vacuum degree, and the continuous provision of the butt locking and sealing force still needs to be realized by the air supply of the cylinder

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