Interlayer lead-out structure for low-temperature container

Abstract

The invention discloses an interlayer lead-out structure for a low-temperature container. The interlayer lead-out structure comprises an inner container, a shell, a vacuum isolating sleeve and a lead-out pipe. A vacuum interlayer is formed between the inner container and the shell, and the vacuum isolating sleeve is in sealed connection with the shell and communicates with the vacuum interlayer. One end of the lead-out pipe is connected with the inner container, and the other end of the lead-out pipe penetrates out of the shell to form a stretching part. The stretching part is provided with a bent pipe extending in the inner container cold shrinkage direction in the vacuum isolating sleeve. It is not needed to reserve large space in the vacuum interlayer for mounting of a pipeline, the lead-out pipe can be arranged at the narrow position in the interlayer, and the volume of the inner container is not influenced. In addition, a protruding ring segment and a threaded hole are arranged on a flange, inner container entering is convenient, pressure testing can be conveniently carried out on the inner container before inner container entering, and the performance of the inner container is guaranteed. The pipe is provided with an air seal segment bent upwards, low-temperature liquid can be prevented from flowing to a valve end, the heat transfer rate is reduced, and the insulation performance of the low-temperature container is guaranteed.

Description

technical field [0001] The invention relates to the technical field of cryogenic containers, in particular to an interlayer lead-out structure for a cryogenic container. Background technique [0002] Cryogenic container is a storage tank for transporting and storing low-temperature liquefied gas. It includes an inner tank for loading cryogenic liquid, and an outer shell outside the inner tank. A sandwich is formed between the inner tank and the outer shell, and the interlayer space is filled with Insulating materials and vacuuming are used to ensure that the cryogenic container has good thermal insulation performance. In order to load and unload cryogenic liquids, it is necessary to set up a lead-out structure in the interlayer, but the interlayer lead-out structure in the prior art is generally used A curved pipe connected to the inner tank will be installed in the interlayer space. Since the pipe needs to be bent and takes up a lot of space, a large space needs to be reser...

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Problems solved by technology

[0002] Cryogenic container is a storage tank for transporting and storing low-temperature liquefied gas. It includes an inner tank for loading cryogenic liquid, and an outer shell outside the inner tank. A sandwich is formed between the inner tank and the outer shell, and the interlayer space is filled with Insulating materials and vacuuming are used to ensure that the cryogenic container has good thermal insulation performance. In order to load and unload cryogenic liquids, it is necessary to set up a lead-out structure in the interlayer, but the interlayer lead-out structure in the prior art is generally used A curved pipe connected to the inner tank will be installed in the interlayer space. Since the pipe needs to be bent and takes up a lot of space, a large space needs to be reserved in the interlayer, which will affect the increase in the volume of the inner tank.

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