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Low-temperature medium liquefaction device

A low-temperature medium and liquefaction device technology, applied in the field of liquefaction, can solve the problems of increasing the gas demand of the low-temperature medium, the large diameter of the wide-mouth Dewar neck tube, and the unused heat transfer area, so as to achieve the effect of avoiding convective heat transfer.

Active Publication Date: 2012-07-18
中国船舶重工集团公司第七一二研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the first structure are: (1) The bottom surface of the low-temperature end of the cold head of the refrigerator transfers cold energy to the cooling medium through the cold head heat exchanger, but the side surfaces of the low-temperature end are all in a vacuum environment, and the heat transfer area of ​​this part is not used; (2) Since the cold head of the refrigerator is in a vacuum environment, the installation, maintenance and disassembly of the cold head of the refrigerator are very inconvenient
The Dewar vacuum is destroyed when the cold head is disassembled, and it needs to be vacuumed again after each reinstallation. Due to the long vacuuming time and complicated pumping process, this brings great inconvenience to the maintenance operation of the cryogenic medium liquefaction device sex
The main disadvantage of the second structure is that the wide-mouth Dewar neck tube is too large in diameter, which is easy to form natural convection, resulting in large heat leakage. At the same time, the Dewar inner cavity has a large space, which increases the gas demand for low-temperature media.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: figure 1 As well as 2 3 Shows: A low -temperature media liquefied device with a Dolva 1 and heat exchange components; the heat exchanges components are heat exchangers 2, custard 3, refrigerator cold head 4. Licensed pipe 7, transmission tube, transmission tube, transmission tube, transmission tube8; Among them, Duwa 1, sleeve 3, liquid collection tube 7 and transmission tube 8 can be made with stainless steel pipes. The heat exchanger 2 is made of high heating material, such as copper.The upper end of the pipe 3 is sealing and fixed on the upper part of the inner cavity of Duwa 1, and the lower end and liquid collecting pipe 7 seal the Unicom;Connect, the other end leads to the outside of Duwa 1; refrigerator Cold head 4 Selects the GM refrigerator cold head.; Inserting heat exchangers 2 inserted into the liquid collector 7; the inner wall and refrigerator cold head 4 of the pipe 3 and liquid collecting pipe 7 and the transmission pipe 8 to form a low -temperatu...

Embodiment 2

[0026] Example 2: Different from Example 1, the "O" density sealing ring 10 between its refrigerator cold head 4 and the French 5 is a metal sealing ring; the vacuum area 6 its space inner wall and Duwa 1 outer wallThere are multiple layers of heat insulation layers between them; the outer wall of the tube 3 has the heat insulation layer made of insulation material. This example is the insulation layer made of ten -layer double -sided aluminum -plated polymeting film and glass fiber cloth;Tube 7 is installed vertically, and the connector 7.1 is on the upper end; the pipe 3 inner wall and the refrigerator cold head 4 have a gap of 0.5 mm.

Embodiment 3

[0027] Example 3: figure 2 As well as 3 The 4 shown in the 4 is different from the embodiment 1: it is a low -temperature medium liquefied device with 2 integrated heat exchanges components, and 1 Dawa 1 and 2 heat exchange components; each heat exchange component includes 1The heat exchanger 2 and 1 suite 3 and L refrigerators are cold head 4; each heat exchange component has a total of 1 set liquid pipe 7, and there are also transmission pipe 8;The upper part of the inner cavity, the lower end and the liquid collecting pipe 7 seal the connected Unicom; the transmission tube 8 end and the liquid collecting tube 7 seal the unicom, the middle and Dawa 1 seal fixed connection, the other end is to Duwa 1; each one; each one; each end; each end; each end; each end to Duwa 1; each one; each one; each end; each end; each end to Duwa 1; each end; each end; each end; each end to Duwa 1; each end; each end; each end; each end to Duwa 1; each end; each end; each end;The upper part of the re...

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Abstract

The invention relates to a low-temperature medium liquefaction device which comprises a Dewar and a heat exchange assembly, wherein the heat exchange assembly comprises a heat exchanger, a sleeve, a refrigerator cold head, a collector tube and a transmission tube; the upper end of the sleeve is hermetically and fixedly connected to the upper part of an inner cavity of the Dewar, and the lower endof the sleeve is hermetically and fixedly communicated with the collector tube; one end of the transmission tube is hermetically and fixedly communicated with the lower part of the collector tube, the middle part of the transmission tube is hermetically and fixedly connected with the Dewar, and the other end of the transmission tube is communicated to a cooled object outside the Dewar; the upper part of the refrigerator cold head is hermetically and fixedly connected with the Dewar, the lower part of the refrigerator cold head is arranged in the inner cavity of the sleeve, and the lower end of the refrigerator cold head is connected with the heat exchanger. The low-temperature medium liquefaction device disclosed by the invention has the advantages that: the heat transfer area at the low-temperature end of the refrigerator cold head is fully utilized, the heat leakage quantity is reduced, the working efficiency is improved, the energy resources are saved, the convenience for assembly and disassembly is achieved, and the manufacturing and maintaining cost is reduced.

Description

Technical field [0001] The present invention involves a low -temperature media liquefaction device, which is particularly suitable for the use of single or multiple refrigerators to integrate liquefied low -temperature medium, which belongs to the field of liquefied technology. Background technique [0002] The existing technology's refrigerator integration technology mainly adopts two ways. The first is: place the refrigerator in the vacuum, the refrigerator's cold head connects the heat exchanger, the heat exchanger and low temperature medium (suchLiquid hydrogen) The container welded by the container, using the heat exchanger to cool down the low -temperature medium in the container; the second is that the refrigerator's cold head is placed in Duvarin biliary, and the low -temperature liquid medium is in the bottom layer of Duwan bile in GuangkouThe gaseous medium is distributed in the upper part of the end gallbladder, and the refrigerator's cold head directly contacts the lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C13/00
Inventor 陈伟代义军郑军方芳
Owner 中国船舶重工集团公司第七一二研究所
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