CN111120781A - Cold shield structure for low-temperature transmission pipeline - Google Patents
Cold shield structure for low-temperature transmission pipeline Download PDFInfo
- Publication number
- CN111120781A CN111120781A CN201911401836.1A CN201911401836A CN111120781A CN 111120781 A CN111120781 A CN 111120781A CN 201911401836 A CN201911401836 A CN 201911401836A CN 111120781 A CN111120781 A CN 111120781A
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- China
- Prior art keywords
- cold shield
- transition sleeve
- cooling pipe
- cold
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
- F16L59/024—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves composed of two half sleeves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a cold shield structure for a low-temperature transmission pipeline, which comprises a cold shield, a cooling pipe and at least one transition sleeve sleeved on the outer surface of the cooling pipe, wherein each transition sleeve is formed by oppositely butting and connecting a pair of semi-cylindrical openings, the outer wall of each transition sleeve is provided with a welding plate extending radially outwards, the cold shield is of a cylindrical structure, the cylindrical wall of the cold shield is provided with an axial gap for accommodating the cooling pipe and the transition sleeve, the welding plates are welded and connected with the cylindrical wall of the cold shield positioned on two sides of the circumferential direction of the axial gap, and the cold shield and the transition sleeve are made of the same material. The cold shield structure is easy to weld, high in reliability and wide in application range.
Description
Technical Field
The invention belongs to the technical field of low-temperature refrigeration, and particularly relates to a cold shield structure for a low-temperature transmission pipeline.
Background
The low-temperature transmission pipeline is used for reducing heat leakage of low-temperature liquid, and particularly a large-caliber long-distance extremely-low-temperature fluid transmission pipeline is generally provided with a cold shield structure with the temperature between room temperature and low-temperature fluid between the extremely-low-temperature fluid pipeline and the vacuum outer pipe so as to reduce heat leakage of the whole device. The cold shield structure comprises a cold shield and a cooling pipe. The cold shield is generally made of a metal material with relatively good thermal conductivity, and in order to cool the cold shield, the cooling tube is generally welded with the cold shield cylinder body so as to realize the transmission of cold energy.
It should be noted that, if the cooling pipe and the cold shield are connected by welding, in order to ensure the heat transfer effect between the cooling pipe and the cold shield, the cooling pipe and the cold shield are often made of the same aluminum alloy material and are connected by arc welding. Meanwhile, the long-distance transmission of the pipelines must use a low-temperature cold-shrinkage compensator to connect the pipelines. Most of the existing low-temperature cold-shrinkage compensators are made of steel materials. The conventional coupling form is often because cooling tube and compensation equipment matter are different, will satisfy the low temperature sealed requirement and must increase the adapter of different materials (two kinds of materials of an adapter promptly), and cooling tube and compensator weld respectively with the corresponding material of transition joint, have that the welding degree of difficulty is big, the welding seam quality is not high, welding cost is high not enough.
In addition, the cooling pipe and the cold shield are connected by adopting a welding mode, so that the wall thickness of the cooling pipe is locally thinned easily, and meanwhile, welding stress is generated at the welding seam position of the pipe wall of the cooling pipe, and the toughness of the pipeline is reduced.
Disclosure of Invention
The invention aims at improving the prior technical problem, namely the invention aims to provide a cold shield structure for a low-temperature transmission pipeline, which is easy to weld and high in reliability.
The technical scheme provided by the invention is as follows:
the cold shield structure for the low-temperature transmission pipeline comprises a cold shield and a cooling pipe and further comprises at least one transition sleeve sleeved on the outer surface of the cooling pipe, each transition sleeve is formed by oppositely butting and connecting a pair of semi-cylinder openings, the outer wall of each transition sleeve is provided with a welding plate extending radially outwards, the cold shield is of a cylindrical structure, an axial gap for accommodating the cooling pipe and the transition sleeve is formed in the cylinder wall of the cold shield, the welding plates are in welding connection with the cylinder walls on the two sides of the circumferential direction of the axial gap in the cold shield, and the cold shield and the transition sleeve are made of the same material.
Further, the transition sleeves are multiple and arranged in a row along the length direction of the cooling pipe.
Furthermore, the transition sleeve is sleeved on the outer surface of the cooling pipe in an interference fit mode.
Furthermore, the welding plate is arranged at the straight edge of the semi-cylinder and is parallel to the axial direction of the transition sleeve.
Further, the cold shield is made of aluminum alloy, the cooling pipe is made of stainless steel, and the transition sleeve is made of aluminum alloy.
By adopting the cold shield structure for the low-temperature transmission pipeline with the structural form, the transition sleeve is sleeved on the cooling pipe, and meanwhile, the transition sleeve is welded with the cold shield, so that reliable thermal connection between the cooling pipe and the cold shield is realized. Meanwhile, the cooling pipe is made of the same material as the low-temperature cold-shrinkage compensator, the cold shield and the transition sleeve are made of the same material, and the welding technology difficulty and the welding reliability between the same materials are low.
Drawings
FIG. 1 is a schematic view of the connection of a cooling pipe and a transition sleeve in a cold shield structure for a cryogenic transfer line.
FIG. 2 is a schematic view of the connection of a transition sleeve to a cold shield in a cold shield configuration for a cryogenic transfer line.
Fig. 3 is a top view of the transition sleeve and cold shield connection in the cold shield configuration of fig. 2.
Fig. 4 is a sectional view of a cold shield structure for a cryogenic transfer line after installation.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in fig. 1 to 3, the cold shield structure for a cryogenic transfer line includes a cooling pipe 10, a transition sleeve 20, and a cold shield 30.
The outer surface of the cooling tube 10 is sleeved with a plurality of transition sleeves 20 along the length direction thereof. Each transition sleeve 20 is formed by a pair of half cylinders (a first half cylinder 21 and a second half cylinder 22, respectively) that are oppositely butted in opening. The butt joint connection mode between each pair of semi-cylinders is the prior art, and the specific implementation modes are many. For example, a snap structure is arranged on the butt straight edge of the half cylinders, and the two half cylinders are connected in a snap connection mode.
The first half cylinder 21 has first welding plates 211 extending radially outward at two edges of its straight edge, and the second half cylinder 22 has second welding plates 221 extending radially outward at two edges of its straight edge. The first and second weld plates 211 and 221 are parallel to the axial direction of the transition sleeve 20. The first welding plate 211 and the second welding plate 221 are arranged alternately in the length direction of the transition sleeve 20.
The transition sleeve 20 is sleeved on the outer surface of the cooling pipe in an interference fit mode. The cold shield cylinder 30 is a cylindrical structure having a diameter much larger than that of the cooling pipe. In order to connect the cold shield cylinder 30 to the transition sleeve 20, the wall of the cold shield cylinder 30 is provided with an axially extending slot 31 for receiving the transition sleeve 20.
The first weld plate 211 and the second weld plate 221 of the transition sleeve are welded to the wall of the cold shield cylinder 30 near the gap 31.
The shrinkage coefficient of different materials is different under the low temperature, and the cold shrinkage coefficient of the transition sleeve is larger than that of the cooling pipe. The cooling tube 10 is typically made of stainless steel, the transition sleeve 20 is made of aluminum alloy, and the cold shield is made of aluminum alloy. The compensator connected between the cooling pipes is also made of stainless steel.
The cold shield structure for the low-temperature transmission pipeline is almost not different from the direct welding form of the traditional cooling pipe cold shield through practical verification, but the sealing performance is greatly improved. The cooling pipe and the compensator are made of the same material, so that a transition joint is not needed, and the welding performance is better ensured. In addition, the structure reduces the welding difficulty, the manufacturing difficulty and the manufacturing cost.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The cold shield structure for the low-temperature transmission pipeline comprises a cold shield and a cooling pipe and is characterized by further comprising at least one transition sleeve sleeved on the outer surface of the cooling pipe, wherein each transition sleeve is formed by oppositely butting and connecting a pair of semi-cylindrical openings, the outer wall of each transition sleeve is provided with a welding plate extending radially outwards, the cold shield is of a cylindrical structure, an axial gap for accommodating the cooling pipe and the transition sleeve is formed in the cylindrical wall of the cold shield, the welding plates are in welding connection with the cylindrical walls on the two sides of the circumferential direction of the axial gap in the cold shield, and the cold shield and the transition sleeve are made of the same material.
2. The cold shield structure for a cryogenic transfer line according to claim 1, wherein the transition sleeve is plural and arranged in a row along a length direction of the cooling pipe.
3. The cold shield structure for the cryogenic transfer line according to claim 1 or 2, wherein the transition sleeve is sleeved on the outer surface of the cooling pipe in an interference fit manner.
4. The cold shield structure for the cryogenic transfer line of claim 3, wherein the welding plate is disposed at the straight edge of the half cylinder and is parallel to the axial direction of the transition sleeve.
5. The cold shield structure for the low-temperature transmission pipeline according to claim 1 or 2, wherein the cold shield is made of an aluminum alloy material, the cooling pipe is made of a stainless steel material, and the transition sleeve is made of an aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911401836.1A CN111120781A (en) | 2019-12-30 | 2019-12-30 | Cold shield structure for low-temperature transmission pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911401836.1A CN111120781A (en) | 2019-12-30 | 2019-12-30 | Cold shield structure for low-temperature transmission pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111120781A true CN111120781A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911401836.1A Pending CN111120781A (en) | 2019-12-30 | 2019-12-30 | Cold shield structure for low-temperature transmission pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120781A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217718A (en) * | 2020-07-09 | 2021-08-06 | 安徽万瑞冷电科技有限公司 | Novel multi-channel low-temperature transmission pipeline |
| CN113586940A (en) * | 2021-07-30 | 2021-11-02 | 中科富海(中山)低温装备制造有限公司 | Liquid nitrogen cold shield structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD274078A1 (en) * | 1988-07-12 | 1989-12-06 | Innenausbau Und Wassertechnik | insulator |
| CN102866370A (en) * | 2011-07-06 | 2013-01-09 | 西门子(深圳)磁共振有限公司 | Superconducting magnet device and magnetic resonance imaging system |
| CN203823261U (en) * | 2014-04-22 | 2014-09-10 | 中国科学院等离子体物理研究所 | Low-temperature pipeline return gas cold shieldsystem |
| CN104879614A (en) * | 2015-04-22 | 2015-09-02 | 上海佳豪船舶工程设计股份有限公司 | Vacuum heat-insulating sleeve |
| CN207471021U (en) * | 2017-10-16 | 2018-06-08 | 中国科学院高能物理研究所 | A kind of vacuum interlayer cryogenic fluid transfer pipeline |
-
2019
- 2019-12-30 CN CN201911401836.1A patent/CN111120781A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD274078A1 (en) * | 1988-07-12 | 1989-12-06 | Innenausbau Und Wassertechnik | insulator |
| CN102866370A (en) * | 2011-07-06 | 2013-01-09 | 西门子(深圳)磁共振有限公司 | Superconducting magnet device and magnetic resonance imaging system |
| CN203823261U (en) * | 2014-04-22 | 2014-09-10 | 中国科学院等离子体物理研究所 | Low-temperature pipeline return gas cold shieldsystem |
| CN104879614A (en) * | 2015-04-22 | 2015-09-02 | 上海佳豪船舶工程设计股份有限公司 | Vacuum heat-insulating sleeve |
| CN207471021U (en) * | 2017-10-16 | 2018-06-08 | 中国科学院高能物理研究所 | A kind of vacuum interlayer cryogenic fluid transfer pipeline |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217718A (en) * | 2020-07-09 | 2021-08-06 | 安徽万瑞冷电科技有限公司 | Novel multi-channel low-temperature transmission pipeline |
| CN113217718B (en) * | 2020-07-09 | 2023-09-19 | 安徽万瑞冷电科技有限公司 | Novel multichannel low-temperature transmission pipeline |
| CN113586940A (en) * | 2021-07-30 | 2021-11-02 | 中科富海(中山)低温装备制造有限公司 | Liquid nitrogen cold shield structure |
| CN113586940B (en) * | 2021-07-30 | 2023-08-18 | 中科富海(中山)低温装备制造有限公司 | Liquid nitrogen cold screen structure |
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Application publication date: 20200508 |