CN114284761B - Superconducting cable adapter - Google Patents
Superconducting cable adapter Download PDFInfo
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- CN114284761B CN114284761B CN202111568395.1A CN202111568395A CN114284761B CN 114284761 B CN114284761 B CN 114284761B CN 202111568395 A CN202111568395 A CN 202111568395A CN 114284761 B CN114284761 B CN 114284761B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
The invention discloses a superconducting cable adapter, which is used for connecting a three-phase coaxial superconducting cable and a metal enclosed superconducting transmission line, and comprises: a heat insulating cylinder containing liquid nitrogen therein; the adapter conductor is arranged in the heat insulation cylinder and is respectively connected with the three-phase coaxial superconducting cable and the basin-type insulator of the metal-enclosed superconducting transmission line; the adapter conductor is used for converting a three-phase conductor which is coaxially arranged of the three-phase coaxial superconducting cable into a three-phase conductor which is arranged in a regular triangle, and the three-phase conductor which is arranged in the regular triangle is respectively connected with the three-phase conductive seat on the basin-type insulator. According to the invention, the three-phase adapter conductors are arranged in the heat insulation cylinder and are respectively connected with the three-phase conductor layer of the three-phase coaxial superconducting cable and the three-phase conductive seat on the basin-type insulator, so that the connection between the three-phase coaxial superconducting cable and the metal enclosed superconducting transmission line is realized.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a superconducting cable adapter.
Background
The superconductor is a conductor with zero resistance characteristic at critical temperature, can reduce resistance loss during electric energy transmission, and can be soaked in liquid nitrogen to show superconducting characteristic when working at 77 k. The superconducting transmission mode mainly comprises a three-phase coaxial superconducting cable and a metal closed superconducting transmission line, when the two modes are simultaneously applied in engineering, corresponding switching components are required to be manufactured, mechanical and electrical connection of different structures is realized, low-temperature performance, conductivity and insulation performance are ensured, and at present, no product with the function exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing a superconducting cable adapter for realizing the adapter between a three-phase coaxial superconducting cable and a metal enclosed superconducting transmission line.
In order to solve the technical problems, the present invention provides a superconducting cable adapter for connecting a three-phase coaxial superconducting cable and a metal-enclosed superconducting transmission line, the superconducting cable adapter comprising:
a heat insulating cylinder containing liquid nitrogen therein;
the adapter conductor is arranged in the heat insulation cylinder and is respectively connected with the three-phase coaxial superconducting cable and the basin-type insulator of the metal-enclosed superconducting transmission line; the adapter conductor is used for converting a three-phase conductor which is coaxially arranged of the three-phase coaxial superconducting cable into a three-phase conductor which is arranged in a regular triangle, and the three-phase conductor which is arranged in the regular triangle is respectively connected with the three-phase conductive seat on the basin-type insulator.
Further, the heat insulation cylinder comprises a cylinder body, main flanges arranged at the front end and the rear end of the cylinder body, and a handhole cover flange arranged at the top of the side surface of the cylinder body, and a long-strip-shaped bracket is arranged in the handhole cover flange along the radial direction.
Further, the cylinder body, the main flange and the hand hole cover flange are all provided with sandwich structures, and vacuum is pumped in the sandwich structures and the heat-insulating perlite is filled in the sandwich structures.
Further, the adapter conductor comprises an A-phase adapter conductor, a B-phase adapter conductor and a C-phase adapter conductor, and the A-phase adapter conductor further comprises an A-phase conductive arm, an A-phase conductive ring which is arranged at one end of the A-phase conductive arm and is bent relative to the A-phase conductive arm, and an A-phase connecting flange which is arranged at the other end of the A-phase conductive arm; the B-phase adapter conductor further comprises a B-phase conductive arm, a B-phase conductive ring which is arranged at one end of the B-phase conductive arm and is bent relative to the B-phase conductive arm, and a B-phase connecting flange which is arranged at the other end of the B-phase conductive arm; the C-phase adapter conductor 3 further comprises a C-phase conductive arm, a C-phase conductive ring which is arranged at one end of the C-phase conductive arm and is bent relative to the C-phase conductive arm, and a C-phase connecting flange which is arranged at the other end of the C-phase conductive arm.
Further, the A-phase connecting flange is connected with the A-phase conducting seat of the basin-type insulator, the B-phase connecting flange is connected with the B-phase conducting seat of the basin-type insulator, and the C-phase connecting flange is connected with the C-phase conducting seat of the basin-type insulator.
Further, the axes of the A phase connecting flange, the B phase connecting flange and the C phase connecting flange respectively form three vertexes of a regular triangle.
Further, the axes of the phase A conducting ring, the phase B conducting ring and the phase C conducting ring are coincident, so that the three-phase coaxial superconducting cable sequentially passes through the phase C conducting ring, the phase B conducting ring and the phase A conducting ring.
Further, the A-phase conducting ring is connected with an A-phase conductor layer of the three-phase coaxial superconducting cable, the B-phase conducting ring is connected with a B-phase conductor layer of the three-phase coaxial superconducting cable, and the C-phase conducting ring is connected with a C-phase conductor layer of the three-phase coaxial superconducting cable.
Further, the superconducting cable adapter further comprises a suspension insulator, wherein the suspension insulator is connected with the B-phase adapter conductor and used for fixing the three-phase coaxial superconducting cable at the axis position of the heat insulation cylinder.
Further, the suspension insulator comprises a threaded part, a connecting column and a connecting ball from top to bottom, wherein the threaded part is in threaded connection with a bracket on the cylinder body so as to suspend and fix the suspension insulator, and the connecting ball is of a spherical structure with a hollow inside and is respectively connected with the B-phase conductive arm and the B-phase conductive ring.
The implementation of the invention has the following beneficial effects: the three-phase adapter conductors are respectively connected with the three-phase conductor layer of the three-phase coaxial superconducting cable and the three-phase conductive seat on the basin-type insulator and are arranged in a regular triangle form, so that the coaxially arranged three-phase conductors of the three-phase coaxial superconducting cable are converted into conductors with three phases arranged in a regular triangle form, and the connection of the three-phase coaxial superconducting cable and the metal-enclosed superconducting transmission line is realized; the heat insulation cylinder is filled with liquid nitrogen, so that the superconducting state of the superconducting device can be realized, meanwhile, the liquid nitrogen also plays an insulating role, and the insulating property between three-phase conductors is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram illustrating an assembled cross-sectional structure of a superconducting cable adapter according to an embodiment of the present invention.
Fig. 2 is an exploded assembly view of a superconducting cable adapter according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating an assembled perspective structure of a superconducting cable adapter according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a heat insulating cylinder according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a heat insulating cylinder in an embodiment of the present invention.
Fig. 6 is a schematic perspective view of a transition joint conductor according to an embodiment of the invention.
Fig. 7 is a schematic perspective view of a suspension insulator according to an embodiment of the present invention.
Detailed Description
The following description of embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the invention and are not intended to limit the scope of the invention.
Referring to fig. 1-3, an embodiment of the present invention provides a superconducting cable adapter for connecting a three-phase coaxial superconducting cable and a metal-enclosed superconducting transmission line, the superconducting cable adapter includes:
a heat insulating cylinder 1 containing liquid nitrogen therein;
an adapter conductor 2 arranged in the heat insulation cylinder 1, wherein the adapter conductor 2 is respectively connected with a three-phase coaxial superconducting cable 3 and a basin-type insulator 4 of a metal-enclosed superconducting transmission line; the adapter conductor 2 is used for converting a three-phase conductor which is coaxially arranged in the three-phase coaxial superconducting cable 3 into a three-phase conductor which is arranged in a regular triangle, and connecting the three-phase conductor which is arranged in the regular triangle with the three-phase conductive seat on the basin-type insulator 4 respectively.
Specifically, referring to fig. 4-7, the heat insulating cylinder 1 is made of 304 stainless steel by welding, and comprises a cylinder 10, main flanges 11 installed at the front end and the rear end of the cylinder 10, and hand hole cover flanges 12 installed at the top of the side surface of the cylinder 10, wherein the two main flanges 11 have the same structure, one of the two main flanges is connected with a basin-type insulator 4 of a metal-enclosed superconducting transmission line, and the other main flange is connected with an adapter flange 8; the handhole cover flange 12 is used for mounting the handhole cover 6. An elongated bracket 13 is arranged in the hand hole cover flange 12 along the radial direction and is used for installing the suspension insulator 5. As can be seen from fig. 5, the cylinder 10, the main flange 11 and the manhole cover flange 12 are provided with a sandwich structure 14, and the sandwich structure 14 is vacuumized and filled with heat-insulating perlite to realize heat insulation.
In this embodiment, the adaptor conductor 2 includes an a-phase adaptor conductor 21, a B-phase adaptor conductor 22 and a C-phase adaptor conductor 23, and the a-phase adaptor conductor 21 further includes an a-phase conductive arm 210, an a-phase conductive ring 211 disposed at one end of the a-phase conductive arm 210 and bent with respect to the a-phase conductive arm 210, and an a-phase connection flange 212 disposed at the other end of the a-phase conductive arm 210; the B-phase adaptor conductor 22 further comprises a B-phase conductive arm 220, a B-phase conductive ring 221 arranged at one end of the B-phase conductive arm 220 and bent relative to the B-phase conductive arm 220, and a B-phase connection flange 222 arranged at the other end of the B-phase conductive arm 220; the C-phase joint conductor 23 further includes a C-phase conductive arm 230, a C-phase conductive ring 231 provided at one end of the C-phase conductive arm 230 and bent with respect to the C-phase conductive arm 230, and a C-phase connection flange 232 provided at the other end of the C-phase conductive arm 230. The a-phase connection flange 212 is connected to the a-phase conductive seat 41 of the basin-type insulator 4, the B-phase connection flange 222 is connected to the B-phase conductive seat 42 of the basin-type insulator 4, and the C-phase connection flange 232 is connected to the C-phase conductive seat 43 of the basin-type insulator 4. The axes of the connection flange 212, the connection flange 222 and the connection flange 232 form three apexes of a regular triangle, respectively, and if the three axes are connected, a regular triangle is formed. The axes of the A-phase conductive ring 211, the B-phase conductive ring 221 and the C-phase conductive ring 231 are coincident, so that the three-phase coaxial superconducting cable 3 can sequentially pass through the C-phase conductive ring 231, the B-phase conductive ring 221 and the A-phase conductive ring 211, meanwhile, the A-phase conductive ring 211 is connected with an A-phase conductor layer of the three-phase coaxial superconducting cable 3, the B-phase conductive ring 221 is connected with a B-phase conductor layer of the three-phase coaxial superconducting cable 3, the C-phase conductive ring 231 is connected with a C-phase conductor layer of the three-phase coaxial superconducting cable 3, and the connection mode is specifically that soldering is adopted for fixing so as to realize mechanical connection and electrical connection. As an example, the inner diameters of the a-phase conductive ring 211, the B-phase conductive ring 221, and the C-phase conductive ring 231 are 95mm, 115mm, and 135mm, respectively; the lengths of the A-phase conductive arm 210, the B-phase conductive arm 220 and the C-phase conductive arm 230 are 1500mm, 1600mm and 1700mm respectively. It can be seen that, through the superconducting cable adapter of the present embodiment, the coaxially arranged three-phase conductors of the three-phase coaxial superconducting cable 3 are converted into conductors with three phases arranged in a regular triangle, and are respectively connected with the three-phase conductive seats on the basin-type insulator 4, thereby realizing the connection of the three-phase coaxial superconducting cable and the metal enclosed superconducting transmission line. It can be understood that the heat insulation cylinder 1 is filled with liquid nitrogen, so that the superconducting state of the superconducting device can be realized, and meanwhile, the liquid nitrogen also plays an insulating role, so that the insulating performance among three-phase conductors is ensured.
The suspension insulator 5 is connected to the B-phase joint conductor 22, and is used for fixing the three-phase coaxial superconducting cable 3 at the axial center position of the insulating cylinder 1, and preventing the joint conductor 2 and the three-phase coaxial superconducting cable 3 from falling down due to gravity. The whole suspension insulator 5 is made of polytetrafluoroethylene blocks through cutting, and comprises a threaded portion 51, a connecting column 52 and a connecting ball 53 from top to bottom, wherein the threaded portion 51 is in threaded connection with the bracket 13 on the cylinder 10 so as to suspend and fix the suspension insulator 5, and the connecting ball 53 is of a spherical structure with a hollow inside and is respectively connected with the B-phase conductive arm 220 and the B-phase conductive ring 221.
It should be noted that the three-phase coaxial superconducting cable 3 passes through the sealing flange 7, and the sealing flange 7 is assembled with the main flange 11 of the insulating cylinder 1 through the adapter flange 8 to fix the three-phase coaxial superconducting cable 3 and seal the insulating cylinder 1. The sealing flange 7 and the adapting flange 8 are also provided with sandwich structures, and the inside of the sandwich structures is vacuumized and filled with heat-insulating perlite to realize heat insulation.
As can be seen from the above description, compared with the prior art, the implementation of the invention has the following beneficial effects: the three-phase adapter conductors are respectively connected with the three-phase conductor layer of the three-phase coaxial superconducting cable and the three-phase conductive seat on the basin-type insulator and are arranged in a regular triangle form, so that the coaxially arranged three-phase conductors of the three-phase coaxial superconducting cable are converted into conductors with three phases arranged in a regular triangle form, and the connection of the three-phase coaxial superconducting cable and the metal-enclosed superconducting transmission line is realized; the heat insulation cylinder is filled with liquid nitrogen, so that the superconducting state of the superconducting device can be realized, meanwhile, the liquid nitrogen also plays an insulating role, and the insulating property between three-phase conductors is ensured.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A superconducting cable adapter for connecting a three-phase coaxial superconducting cable and a metal-enclosed superconducting transmission line, the superconducting cable adapter comprising:
a heat insulating cylinder containing liquid nitrogen therein;
the adapter conductor is arranged in the heat insulation cylinder and is respectively connected with the three-phase coaxial superconducting cable and the basin-type insulator of the metal-enclosed superconducting transmission line; the adapter conductor is used for converting a three-phase conductor which is coaxially arranged of the three-phase coaxial superconducting cable into a three-phase conductor which is arranged in a regular triangle, and the three-phase conductor which is arranged in the regular triangle is respectively connected with the three-phase conductive seat on the basin-type insulator;
the heat insulation cylinder comprises a cylinder body, main flanges arranged at the front end and the rear end of the cylinder body and a handhole cover flange arranged at the top of the side surface of the cylinder body, and a long strip-shaped bracket is arranged in the handhole cover flange along the radial direction;
the adapter conductor comprises an A-phase adapter conductor, a B-phase adapter conductor and a C-phase adapter conductor, and the A-phase adapter conductor further comprises an A-phase conductive arm, an A-phase conductive ring which is arranged at one end of the A-phase conductive arm and is bent relative to the A-phase conductive arm, and an A-phase connecting flange which is arranged at the other end of the A-phase conductive arm; the B-phase adapter conductor further comprises a B-phase conductive arm, a B-phase conductive ring which is arranged at one end of the B-phase conductive arm and is bent relative to the B-phase conductive arm, and a B-phase connecting flange which is arranged at the other end of the B-phase conductive arm; the C-phase adapter conductor further comprises a C-phase conductive arm, a C-phase conductive ring which is arranged at one end of the C-phase conductive arm and is bent relative to the C-phase conductive arm, and a C-phase connecting flange which is arranged at the other end of the C-phase conductive arm;
the superconducting cable adapter further comprises a suspension insulator, wherein the suspension insulator is connected with the B-phase adapter conductor and is used for fixing the three-phase coaxial superconducting cable at the axis position of the heat insulation cylinder; the suspension insulator comprises a threaded part, a connecting column and a connecting ball from top to bottom, wherein the threaded part is in threaded connection with a bracket on the cylinder body so as to suspend and fix the suspension insulator, and the connecting ball is of a spherical structure with a hollow inside and is respectively connected with the B-phase conducting arm and the B-phase conducting ring.
2. The superconducting cable adapter of claim 1 wherein the barrel, main flange and handhole cover flange each have a sandwich structure, the sandwich structure being evacuated and filled with thermally insulating perlite.
3. The superconducting cable adapter of claim 1 wherein the a-phase connection flange is connected to an a-phase conductive mount of the basin-type insulator, the B-phase connection flange is connected to a B-phase conductive mount of the basin-type insulator, and the C-phase connection flange is connected to a C-phase conductive mount of the basin-type insulator.
4. A superconducting cable transition joint according to claim 3, characterized in that the axes of the a-phase connection flange, the B-phase connection flange and the C-phase connection flange form three apexes of a regular triangle, respectively.
5. The superconducting cable transition joint of claim 4 wherein the axes of the a-phase, B-phase and C-phase conducting rings coincide such that a three-phase coaxial superconducting cable passes through the C-phase, B-phase and a-phase conducting rings in sequence.
6. The superconducting cable transition joint of claim 5 wherein the a-phase conductive ring is connected to an a-phase conductor layer of a three-phase coaxial superconducting cable, the B-phase conductive ring is connected to a B-phase conductor layer of a three-phase coaxial superconducting cable, and the C-phase conductive ring is connected to a C-phase conductor layer of a three-phase coaxial superconducting cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568395.1A CN114284761B (en) | 2021-12-21 | 2021-12-21 | Superconducting cable adapter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568395.1A CN114284761B (en) | 2021-12-21 | 2021-12-21 | Superconducting cable adapter |
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| CN114284761A CN114284761A (en) | 2022-04-05 |
| CN114284761B true CN114284761B (en) | 2023-09-12 |
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| CN113707389A (en) * | 2021-07-23 | 2021-11-26 | 华北电力大学 | Method for designing current sharing of bipolar coaxial high-temperature superconducting direct-current cable |
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| JP4201331B2 (en) * | 2003-06-19 | 2008-12-24 | 住友電気工業株式会社 | Phase branching structure of multiphase superconducting cable |
| US9070494B2 (en) * | 2011-03-17 | 2015-06-30 | Furukawa Electric Co., Ltd. | Fixation structure of superconducting cable and fixation structure of superconducting cable line |
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