Low leakage thermal liquid helium infusion tube
A technology of low heat leakage and infusion tubes, applied in the direction of heat insulation protection pipelines, pipeline protection, heat exchange equipment, etc., can solve the problems of direct discharge, lack of cold source, large heat leakage, etc., to reduce pipeline heat leakage, The effect of reducing liquid helium loss and avoiding loss
Active Publication Date: 2019-04-30
TSINGHUA UNIV
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Problems solved by technology
At the same time, the cost of liquid helium is extremely high. If there is no helium recovery device, the vaporized helium will be discharged directly, which will cause large economic losses.
[0003] The traditional liquid helium infusion tube directly adopts a high-vacuum multi-layer insulation structure. Due to the lack of a suitable cold source, there is no low-temperature cold screen, resulting in large heat leakage
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[0022] 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 of the embodiments of the present invention, not all of them. 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.
[0023] Such as figure 1 and figure 2 As shown, the present invention provides a low heat leakage liquid helium infusion tube, which includes a vacuum outer tube 1 and a cold shield sealing structure 2, wherein: the two ends of the vacuum outer tube 1 are respectively provided with an infusion interface 11; the cold shield sealing structure 2 The cold screen sealing structure 2 has an infusion inner tube 21 and a cold screen tube 22, and the col...
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The invention provides a low-heat-linkage liquid helium conveying pipe comprising vacuum outer pipes and cold shield seal structures. The two ends of each vacuum outer pipe are provided with liquid helium conveying connectors. Each cold shield seal structure is arranged in the corresponding vacuum outer pipe in a penetrating manner. Each cold shield seal structure is provided with a liquid helium conveying inner pipe and a cold shield pipe. Each liquid helium conveying inner pipe is sleeved with the corresponding cold shield pipe. A seal cavity is formed between each cold shield pipe and the corresponding liquid helium conveying inner pipe. Each seal cavity is filled with gas. Each liquid helium conveying inner pipe is provided with a shell containing adsorbent in a sleeved manner. Each shell is located in the corresponding seal cavity. The low-heat-linkage liquid helium conveying pipe can effectively reduce the loss of liquid helium in the conveying process of the liquid helium.
Description
technical field [0001] The invention relates to a liquid helium infusion tube, in particular to a low-leak heat liquid helium infusion tube used in the field of refrigeration and cryogenic engineering. Background technique [0002] With the development of technology, liquid helium has been widely used in low temperature physics, low temperature superconductivity and other fields. Because the temperature of liquid helium is extremely low (the temperature of liquid helium is -269°C), it is very easy to gasify, especially During liquid helium delivery. At the same time, the cost of liquid helium is extremely high. If there is no helium recovery device, the vaporized helium will be discharged directly, which will cause large economic losses. [0003] The traditional liquid helium infusion tube directly adopts a high-vacuum multi-layer insulation structure. Due to the lack of a suitable cold source, there is no low-temperature cold screen, resulting in large heat leakage. Cont...
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IPC IPC(8): F16L59/065F16L53/70
CPCF16L53/00F16L59/065
Inventor 张晨辉刘大猛王婷吴璞雒建斌陈杰巢伟李艳锋
Owner TSINGHUA UNIV