CN112290243B - High-voltage insulation current lead structure - Google Patents
High-voltage insulation current lead structure Download PDFInfo
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- CN112290243B CN112290243B CN202011183964.6A CN202011183964A CN112290243B CN 112290243 B CN112290243 B CN 112290243B CN 202011183964 A CN202011183964 A CN 202011183964A CN 112290243 B CN112290243 B CN 112290243B
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- aluminum pipe
- lower sealing
- copper conductor
- sealing element
- wall
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/68—Connections to or between superconductive connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/521—Sealing between contact members and housing, e.g. sealing insert
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Insulators (AREA)
Abstract
The application discloses high-voltage insulation current lead structure relates to superconducting equipment technical field, includes: a lower seal, an aluminum tube, an epoxy sleeve and a copper conductor; the aluminum pipe is sleeved outside the copper conductor, and an annular first clearance cavity is formed between the inner wall of the aluminum pipe and the outer wall of the copper conductor; the epoxy sleeve is coated outside the aluminum pipe; the lower sealing element is arranged at one end part of the epoxy sleeve and is connected with the epoxy sleeve in a sealing way; one end of the copper conductor, which extends out of the lower sealing element, is provided with a connecting part connected with the lower sealing element; and a second gap cavity is defined between one end of the aluminum pipe facing the lower sealing element, the inner end wall of the lower sealing element, the inner wall of the epoxy sleeve and the outer wall of the copper conductor. Above design for lower sealing member only contacts with the epoxy cover, and not with inside aluminum pipe contact, and in the cooling process of soaking the liquid nitrogen, cooling speed can obtain effective control, and vertical temperature inhomogeneity can obtain optimizing improvement, thereby control the relative deformation volume between aluminum pipe and the epoxy cover, difficult emergence damage, better work under low temperature high voltage environment.
Description
Technical Field
The application relates to the technical field of superconducting equipment, in particular to a high-voltage insulation current lead structure.
Background
The high-voltage insulation current lead applied to the superconducting equipment is used as an interface between the inside of the superconducting equipment such as a superconducting current limiter and an external power grid, spans from a room temperature region to a liquid nitrogen temperature region, has large electric field gradient, and is a key component for heat leakage and overall insulation of a system. At present, the high-voltage insulation current lead used for superconducting equipment is not enough in design, the performance of the high-voltage insulation current lead is unstable, and the high-voltage insulation current lead is easy to break down when used in a low-temperature high-voltage environment.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a high-voltage insulated current lead structure, which has stable performance and can be stably used in a low-temperature and high-voltage environment.
To achieve the above technical object, the present application provides a high voltage insulation current lead structure, comprising: a lower seal, an aluminum tube, an epoxy sleeve and a copper conductor;
the aluminum pipe is sleeved outside the copper conductor, and an annular first clearance cavity is formed between the inner wall of the aluminum pipe and the outer wall of the copper conductor;
the epoxy sleeve is coated outside the aluminum pipe;
the lower sealing element is arranged at one end part of the epoxy sleeve and is connected with the epoxy sleeve in a sealing way;
one end of the copper conductor, which extends out of the lower sealing element, is provided with a connecting part connected with the lower sealing element;
and a second gap cavity is defined between one end of the aluminum pipe facing the lower sealing element and the inner end wall of the lower sealing element, the inner wall of the epoxy sleeve and the outer wall of the copper conductor.
Further, a heat insulation piece is filled in the second clearance cavity.
Further, the heat insulation piece is of an annular ring structure;
the heat insulation piece is sleeved on the copper conductor, and one side surface facing the aluminum pipe is in contact with the aluminum pipe, and the other side surface facing the lower sealing piece is in contact with the lower sealing piece.
Further, the thermal insulation piece is specifically an epoxy thermal insulation piece.
According to the technical scheme, the aluminum pipe is additionally sleeved between the epoxy sleeve and the copper conductor, so that the strength of the supporting structure is improved; meanwhile, a first clearance cavity is formed between the aluminum pipe and the copper conductor and is separated from the lower sealing element, and a second clearance cavity is formed between one end of the aluminum pipe facing the lower sealing element and the inner end wall of the lower sealing element, the inner wall of the epoxy sleeve and the outer wall of the copper conductor. According to the structural design, when the lower sealing element is contacted with liquid nitrogen, the first gap cavity can be used for avoiding direct heat conduction between a copper conductor and the aluminum pipe, and the second gap cavity can be used for avoiding direct heat conduction between the lower sealing element and the aluminum pipe, so that the cooling shrinkage speed of the aluminum pipe is reduced, the phenomenon that the aluminum pipe and an externally coated epoxy sleeve are subjected to larger stress due to larger cooling shrinkage speed difference is avoided, the connection part between the aluminum pipe and the epoxy sleeve is subjected to layered damage, the attenuation of the performance of the whole current lead is finally influenced, and the situation that the aluminum pipe is easily broken down in a low-temperature high-pressure environment is avoided. Through the structural design, the high-voltage insulation current lead structure has stable performance and can be stably used in a low-temperature high-voltage environment.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a high voltage isolated current lead configuration provided herein;
in the figure: 1. an epoxy sleeve; 2. an aluminum tube; 3. a lower seal member; 4. a copper conductor; 41. a connecting portion; 5. a heat shield.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a high-voltage insulation current lead structure.
Referring to fig. 1, an embodiment of a high voltage isolated current lead structure provided in an embodiment of the present application includes:
a lower sealing element 3, an aluminum pipe 2, an epoxy sleeve 1 and a copper conductor 4; the aluminum pipe 2 is sleeved outside the copper conductor 4, and an annular first clearance cavity is formed between the inner wall of the aluminum pipe and the outer wall of the copper conductor 4; the epoxy sleeve 1 is coated outside the aluminum pipe 2; the lower sealing element 3 is arranged at one end part of the epoxy sleeve 1 and is connected with the epoxy sleeve 1 in a sealing way; the copper conductor 4 is provided with a connecting part 41 connected with the lower sealing element 3 at one end extending out of the lower sealing element 3; a second clearance cavity is defined between one end of the aluminum pipe 2 facing the lower sealing element 3, the inner end wall of the lower sealing element 3, the inner wall of the epoxy sleeve 1 and the outer wall of the copper conductor 4. Wherein connecting portion 41 can be a part of copper conductor, with copper conductor body coupling, can be connected fixedly with lower sealing member 3 through fasteners such as screws, certainly, can pass lower sealing member 3 and be connected with epoxy cover 1, and then compress tightly fixed lower sealing member 3, and the appropriate transform can be done according to actual need to the technical staff in the art, does not do the restriction specifically.
According to the technical scheme, the aluminum pipe 2 is additionally sleeved between the epoxy sleeve 1 and the copper conductor 4, so that the strength of the supporting structure is improved; meanwhile, a first clearance cavity is formed between the aluminum pipe 2 and the copper conductor 4, and the aluminum pipe is separated from the lower sealing member 3, so that a second clearance cavity is formed between one end of the aluminum pipe facing the lower sealing member 3, the inner end wall of the lower sealing member 3, the inner wall of the epoxy sleeve 1 and the outer wall of the copper conductor 4. By the structural design, when the lower sealing element 3 contacts liquid nitrogen, the formed first gap cavity can prevent the copper conductor 4 from directly conducting heat with the aluminum pipe 2, and the formed second gap cavity can prevent the lower sealing element 3 from directly conducting heat with the aluminum pipe 2, so that the cooling shrinkage speed of the aluminum pipe 2 is reduced, the cooling speed is effectively controlled, the longitudinal temperature nonuniformity is optimized and improved, the phenomenon that the connection part 41 between the aluminum pipe 2 and the epoxy sleeve 1 is layered and damaged due to the large cooling shrinkage speed difference between the aluminum pipe 2 and the externally coated epoxy sleeve 1 is avoided, the attenuation of the performance of the whole current lead is finally influenced, and the situation that the aluminum pipe is easily broken down in a low-temperature high-pressure environment is caused. Through the structural design, the high-voltage insulation current lead structure has stable performance and can be stably used in a low-temperature high-voltage environment.
The above is a first embodiment of a high-voltage insulated current lead structure provided in the present application, and the following is a second embodiment of a high-voltage insulated current lead structure provided in the present application, specifically referring to fig. 1.
A high voltage isolated current lead structure comprising: a lower sealing element 3, an aluminum pipe 2, an epoxy sleeve 1 and a copper conductor 4; the aluminum pipe 2 is sleeved outside the copper conductor 4, and an annular first clearance cavity is formed between the inner wall of the aluminum pipe and the outer wall of the copper conductor 4; the epoxy sleeve 1 is coated outside the aluminum pipe 2; the lower sealing element 3 is arranged at one end part of the epoxy sleeve 1 and is connected with the epoxy sleeve 1 in a sealing way; the copper conductor 4 is provided with a connecting part 41 connected with the lower sealing element 3 at one end extending out of the lower sealing element 3; a second clearance cavity is defined between one end of the aluminum pipe 2 facing the lower sealing element 3, the inner end wall of the lower sealing element 3, the inner wall of the epoxy sleeve 1 and the outer wall of the copper conductor 4.
Further, in addition to the improvement of the air insulation in the first embodiment, the sealing effect can be improved while a certain insulation effect is achieved, and in the second gap cavity application, for example, the second gap space formed in the first embodiment may be filled with an insulation member 5. The heat conduction of the lower sealing member 3 and the aluminum pipe 2 can be avoided by the heat insulating member 5 in direct contact, and the sealing effect can be further improved by the filled heat insulating member 5, wherein the heat insulating member 5 can be in a ring structure; the copper conductor 4 is covered with a heat insulator 5, one side of which is in contact with the aluminum pipe 2 and the other side of which is in sealing contact with the lower seal 3. For the preparation material, the heat insulator 5 may also be an epoxy heat insulator made of the same epoxy material as the epoxy sheath 1, or other materials with sealing and heat insulating properties, and is not limited in particular. In addition, because the mode of directly arranging the heat insulating material 5 is lower in heat insulating effect than the closed air heat insulating mode, in this embodiment, the heat insulating material 5 can be hermetically connected with the lower sealing member 3 without contacting the aluminum pipe 2 and a certain gap is formed between the heat insulating material 5 and the aluminum pipe 2, so that the heat insulating effect is further improved in combination with the application of the air heat insulating mode, and those skilled in the art can make appropriate changes based on this, and are not limited in particular.
While the present application provides a high-voltage insulated current lead structure, the present application is not limited to the above embodiments, and the embodiments and applications of the present application can be modified according to the spirit of the present application.
Claims (2)
1. A high voltage isolated current lead structure, comprising: a lower seal, an aluminum tube, an epoxy sleeve and a copper conductor;
the aluminum pipe is sleeved outside the copper conductor, and an annular first clearance cavity is formed between the inner wall of the aluminum pipe and the outer wall of the copper conductor;
the epoxy sleeve is coated outside the aluminum pipe;
the lower sealing element is arranged at one end part of the epoxy sleeve and is connected with the epoxy sleeve in a sealing way;
one end of the copper conductor, which extends out of the lower sealing element, is provided with a connecting part connected with the lower sealing element;
a second gap cavity is defined between one end of the aluminum pipe facing the lower sealing element and the inner end wall of the lower sealing element, the inner wall of the epoxy sleeve and the outer wall of the copper conductor;
a heat insulation piece is filled in the second gap cavity;
the heat insulation piece is specifically an epoxy heat insulation piece.
2. A high voltage isolated current lead configuration according to claim 1 wherein said thermal insulation is embodied as an annular ring configuration;
the heat insulation piece is sleeved on the copper conductor, and one side surface facing the aluminum pipe is in contact with the aluminum pipe, and the other side surface facing the lower sealing piece is in contact with the lower sealing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183964.6A CN112290243B (en) | 2020-10-29 | 2020-10-29 | High-voltage insulation current lead structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183964.6A CN112290243B (en) | 2020-10-29 | 2020-10-29 | High-voltage insulation current lead structure |
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| Publication Number | Publication Date |
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| CN112290243A CN112290243A (en) | 2021-01-29 |
| CN112290243B true CN112290243B (en) | 2021-08-27 |
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| CN202011183964.6A Active CN112290243B (en) | 2020-10-29 | 2020-10-29 | High-voltage insulation current lead structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114360820B (en) * | 2022-02-21 | 2024-04-16 | 中国科学院空天信息创新研究院 | High-voltage insulation terminal for space traveling wave tube and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453149A (en) * | 1983-04-01 | 1984-06-05 | General Electric Company | Excitation lead for superconducting devices, particularly magnets |
| JP2005012911A (en) * | 2003-06-19 | 2005-01-13 | Sumitomo Electric Ind Ltd | Terminal structure of cryogenic cable |
| JP5555729B2 (en) * | 2012-02-03 | 2014-07-23 | 昭和電線ケーブルシステム株式会社 | Terminal equipment for cryogenic equipment |
| RU2588607C1 (en) * | 2015-04-21 | 2016-07-10 | Открытое Акционерное Общество "Федеральная Сетевая Компания Единой Энергетической Системы" (Оао "Фск Еэс") | High-voltage current lead of superconducting short-circuit current limiter |
| CN108573789B (en) * | 2018-06-29 | 2024-04-19 | 宁波健信超导科技股份有限公司 | Fixing device for high-temperature superconductive current lead |
| CN208561706U (en) * | 2018-07-27 | 2019-03-01 | 江苏双良新能源装备有限公司 | A kind of polycrystalline silicon reducing furnace electrode insulation structure |
| CN110783721A (en) * | 2019-02-02 | 2020-02-11 | 搏世因（北京）高压电气有限公司 | +/-160 kV low-temperature superconducting sleeve |
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