CN114156829B - Three-phase coaxial superconducting cable terminal system and assembling method thereof - Google Patents
Three-phase coaxial superconducting cable terminal system and assembling method thereof Download PDFInfo
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- CN114156829B CN114156829B CN202111366042.3A CN202111366042A CN114156829B CN 114156829 B CN114156829 B CN 114156829B CN 202111366042 A CN202111366042 A CN 202111366042A CN 114156829 B CN114156829 B CN 114156829B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/34—Cable fittings for cryogenic cables
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
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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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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention relates to a three-phase coaxial superconducting cable terminal system and an assembling method thereof, wherein the three-phase coaxial superconducting cable terminal system comprises: the terminal low-temperature container comprises a frame structure and a shell structure which are connected; the superconducting connection device is arranged on the frame structure and used for penetrating a superconducting cable so as to enable the superconducting cable to extend into the terminal low-temperature container; the drainage device is arranged in the terminal low-temperature container, and the input end of the drainage device is connected with the output end of the superconducting cable; and the sleeve assembly is arranged on the frame structure, extends towards the inside of the terminal low-temperature container and is connected with the output end of the drainage device. Said invention adopts the frame structure and shell structure design connected together, so that it is convenient for electric connection of superconducting connection device, drainage device and sleeve connection device and Dewar installation, and its operation is simple and reliable, and at the same time it is convenient for maintenance and replacement in the course of use.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a three-phase coaxial superconducting cable terminal system and an assembly method thereof.
Background
The superconducting cable has high current transmission capacity, is produced by adopting a second-generation superconducting tape, is connected with a power grid to form a superconducting cable line, and needs to be provided with superconducting cable terminals connected with two sides of the tail side of the superconducting cable besides the superconducting cable.
At present, the superconducting cable terminal is arranged in a terminal low-temperature container with a double-shell structure, and as the superconducting cable, the sleeve and the terminal low-temperature container all need to ensure a low-temperature environment, the connecting process of the superconducting cable, the sleeve and the terminal low-temperature container needs to be penetrated into and out of the terminal low-temperature container, the whole lap joint process and the fixing process are complex, and the superconducting cable terminal is not easy to operate in the terminal low-temperature container with the double-shell structure.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a three-phase coaxial superconducting cable termination system and method of assembling the same that facilitates handling of the superconducting cable and the connection process between the sleeve and the termination cryogen vessel.
A three-phase coaxial superconducting cable termination system, comprising:
the terminal low-temperature container comprises a frame structure and a shell structure which are connected;
the superconducting connection device is arranged on the frame structure and used for penetrating a superconducting cable so as to enable the superconducting cable to extend into the terminal low-temperature container;
The drainage device is arranged in the terminal low-temperature container, and the input end of the drainage device is connected with the output end of the superconducting cable; the drainage device comprises a belt drainage structure matched with a superconducting belt in the superconducting cable, or the drainage device comprises a shielding drainage structure matched with a super shielding layer in the superconducting cable;
the sleeve assembly is arranged on the frame structure, extends into the terminal low-temperature container and is connected with the output end of the drainage device; the bushing assembly comprises a bushing-bushing connecting device, and the bushing comprises a high-voltage bushing and a grounding bushing; one end of the high-voltage sleeve is connected with the belt drainage structure, and the other end of the high-voltage sleeve is connected with a power grid; one end of the grounding sleeve is connected with the shielding drainage structure, and the other end of the grounding sleeve is grounded;
the sleeve connecting device comprises a high-voltage connecting component and a grounding connecting component; the high-voltage connecting assembly is arranged on the terminal low-temperature container and used for penetrating the high-voltage sleeve so that the high-voltage sleeve extends into the terminal low-temperature container; the grounding connection assembly is arranged on the terminal low-temperature container and used for penetrating the grounding sleeve so that the grounding sleeve extends to the inside of the terminal low-temperature container.
In one embodiment, the frame structure comprises an inner support frame and an outer support frame, a first cavity being formed between the inner support frame and the outer support frame; the shell structure comprises an inner shell and an outer shell, and a second cavity is formed between the inner shell and the outer shell; the inner shell is connected with the inner support frame, and the outer shell is connected with the outer support frame.
In one embodiment, the edge of the frame structure is provided with a frame turnout part, and the edge of the shell structure is provided with a shell turnout part; the frame everting portion is connected with the housing everting portion.
In one embodiment, the shielding drainage structure comprises:
the second switching assembly is provided with a second switching cavity; the second transfer cavity is used for placing a belt structure in the superconducting cable;
the second drainage component is electrically connected with the second switching component;
the second drainage connecting assembly is arranged between the second switching assembly and the second drainage assembly and is used for fixedly connecting the second switching assembly and the second drainage assembly.
In one embodiment, the method further comprises:
the flexible connection plate is used for buffering acting force between the drainage device and the sleeve assembly along the length direction of the superconducting cable.
In one embodiment, the connection flexible plate comprises a first connection end matched with the output end of the drainage device and a second connection end matched with the input end of the sleeve, the first connection end of the connection flexible plate is connected with the output end of the drainage device, and the second connection end of the connection flexible plate is connected with the input end of the sleeve.
In one embodiment, the drainage device further comprises a sleeve clamp, wherein the sleeve clamp is arranged at the output end of the drainage device, and the drainage device comprises:
the first clamping part is provided with a first clamping surface;
the second clamping part is provided with a second clamping surface; the second clamping surface and the first clamping surface together form a clamping cavity for clamping the sleeve assembly;
and the clamp fastening component is respectively connected with the first clamping part and the second clamping part.
In one embodiment, the belt drainage structure further comprises a first stress relief assembly.
In one embodiment, the shielding drainage structure further comprises a second stress relief assembly.
An assembling method of a three-phase coaxial superconducting cable terminal system for assembling the three-phase coaxial superconducting cable terminal system, comprising:
assembling a frame structure;
mounting the superconducting Dewar outer tube in the superconducting connection to the frame structure;
mounting a superconducting Dewar inner tube in a superconducting connection device to a terminal of a superconducting cable, and sleeving the superconducting Dewar inner tube in the superconducting Dewar outer tube;
mounting a sleeve assembly to the frame structure;
installing a drainage device on the superconducting cable in a terminal cryogenic container;
connecting the output end of the drainage device with the input end of the sleeve component;
connecting the housing structure with the frame structure.
In the three-phase coaxial superconducting cable terminal system, the terminal low-temperature container adopts the connected frame structure and shell structure design, so that the superconducting connection device, the drainage device, the electric connection of the drainage device and the sleeve assembly and the Dewar installation in the system are convenient, and the operation is simple and convenient and the reliability is high. Meanwhile, the split design of the terminal low-temperature container is convenient for maintenance and replacement in the use process.
According to the assembling method of the three-phase coaxial superconducting cable terminal system, firstly, the superconducting Dewar outer tube in the superconducting connecting device and the sleeve Dewar outer tube in the sleeve connecting device are mounted on the frame structure, then, the superconducting cable and the sleeve are mounted and electrically connected with the terminal low-temperature container through the superconducting connecting device and the sleeve connecting device, and finally, the shell structure is connected with the frame structure to ensure the heat preservation effect of the terminal low-temperature container. The method is used for assembling the system in a reasonable operation space, and the operation difficulty is low.
The various specific structures of the present application, as well as the actions and effects thereof, will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a superconducting cable in one embodiment of the present application;
fig. 2 is a perspective view of a three-phase coaxial superconducting cable termination system according to one embodiment of the present application;
fig. 3 is a cross-sectional view of a three-phase coaxial superconducting cable termination system in one embodiment of the present application;
fig. 4 is an exploded view of a three-phase coaxial superconducting cable termination system according to one embodiment of the present application;
fig. 5 is a front view showing the internal structure of a three-phase coaxial superconducting cable termination system according to one embodiment of the present application;
Fig. 6 is a perspective view showing an internal structure of a three-phase coaxial superconducting cable termination system according to one embodiment of the present application;
FIG. 7 is a schematic view of a shell and an everting portion according to one embodiment of the present application;
fig. 8 is a perspective view of a superconducting joint according to one embodiment of the present application;
fig. 9 is an exploded view of a superconducting joint according to one embodiment of the present application;
FIG. 10 is a cross-sectional view of a superconducting joint according to one embodiment of the present application;
FIG. 11 is a perspective view of a belt drainage structure in one embodiment of the present application;
FIG. 12 is an exploded view of a belt beam drainage structure in one embodiment of the present application;
FIG. 13 is a perspective view of a shield drainage structure according to one embodiment of the present application;
FIG. 14 is an exploded view of a shielded drainage structure according to one embodiment of the present application;
FIG. 15 is a perspective view of a connection compliance plate in one embodiment of the present application;
FIG. 16 is an exploded view of a ferrule holder in accordance with one embodiment of the present application;
FIG. 17 is an exploded view of a liquid nitrogen tank connecting device in one embodiment of the present application;
fig. 18 is an exploded view of a wheel carriage assembly in one embodiment of the present application.
Wherein, in the reference numerals, a 10-superconducting cable; 11-an outer shielding metal strip; 12-top layer superconducting belts; 13-an intermediate layer superconducting belt; 14-underlayer superconducting tape; 15-an inner shielding metal strip; 16-liquid nitrogen tube; 17-an outer dewar tube of the superconducting cable; 18-a dewar tube inside the superconducting cable; 19-superconducting cable Dewar structure; 100-terminal cryogenic vessel; 110-a frame structure; 111-an inner support frame; 112-an outer support frame; 120-a shell structure; 121-an inner housing; 122-an outer housing; 130-frame everts; 131-first frame eversion; 132-second frame eversion; 140-shell turnout; 141-first shell eversion; 142-second housing turn-out; 200-superconducting connection means; 210-superconducting Dewar inner tube; 211-inner tube of superconducting Dewar inner tube; 212-an outer tube of a superconducting Dewar inner tube; 213-superconducting cable dewar inner flange plate; 214-superconducting Dewar inner tube sealing ring; 220-superconducting Dewar outer tube; 221-inner tube of superconducting Dewar outer tube; 222-an outer tube of the superconducting Dewar outer tube; 223-superconducting cable dewar outer flange; 230-superconducting joint assembly; 231-nut; 232-bolts; 240-a heat insulating layer; 250-sealing ring; 300-drainage device; 310-belt drainage structure; 311-a first adapter assembly; 3111-a first inner guard ring; 3112-a first outer guard ring; 312-a first drainage assembly; 313-a first drainage connection assembly; 314—a first stress relief component; 320-shielding drainage structure; 321-a second switching component; 3211-a second inner guard ring; 3212-a fastening assembly; 3213-clip member; 3214-fastening means; 322-a second drainage assembly; 323-a second drain connection assembly; 324-a second stress relief component; 400-sleeve; 410-high voltage bushing; 420-a ground sleeve; 500-a sleeve connection; 510-a high voltage connection assembly; 520-ground connection assembly; 600-connecting the flexible plate; 610-a first connection; 620-a second connection; 630-buffer structure; 700-sleeve clamp; 710—a first clamping portion; 720-a second clamping portion; 730-a clamp fastening member; 800-vacuumizing device; 900-a liquid nitrogen tank connecting device; 910-a liquid nitrogen tank fixing seat; 920-fixing nails of a liquid nitrogen tank; 1000-a wheel carriage assembly; 1010-supporting frames; 1020-pulley; 1030-supporting bar.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
As shown in fig. 1, the superconducting cable 10 includes a tape structure (not shown) and an internal structure (not shown). It is to be understood that the tape structure refers to any one of the outer shielding metal tape 11, the top layer superconducting tape 12, the middle layer superconducting tape 13, the bottom layer superconducting tape 14, and the inner shielding metal tape 15 in the superconducting cable 10. The internal structure is the collection of all structures within the band structure in the current state. For example, the belt structure is the outer shielding metal belt 11, then the inner structure is all other structures within the outer shielding metal belt 11, and when the belt structure is the top superconducting belt 12, then the inner structure is all other structures within the top superconducting belt 12.
In one specific embodiment, when the superconducting cable 10 is a three-phase coaxial superconducting cable, the superconducting cable 10 further comprises a liquid nitrogen pipe 16 located inside the inner shielding metal belt 15, and a superconducting cable dewar structure 19 located outside the outer shielding metal belt 11, wherein the superconducting cable dewar structure 19 comprises a superconducting cable outer dewar pipe 17 and a superconducting cable inner dewar pipe 18, and the inside of the superconducting cable dewar structure 19 is in a vacuum state.
As can be seen from fig. 2 to 5, in one embodiment, a three-phase coaxial superconducting cable termination system includes a termination cryostat 100, a superconducting connection 200, a drainage device 300, and a sleeve assembly (not shown). Wherein the terminal cryogen vessel 100 comprises a frame structure 110 and a housing structure 120 connected. The drainage device 300 is disposed inside the terminal cryogenic container 100, and an input end of the drainage device 300 is connected to an output end of the superconducting cable 10. The superconducting connection device 200 is provided on the frame structure 110. The sleeve assembly is disposed on the frame structure 110 and extends into the interior of the terminal cryogenic container 100 and is connected to the output of the drain 300. The superconducting connection device 200 is used to pass through the superconducting cable 10 so that the superconducting cable 10 extends into the terminal cryogenic container 100. The terminal cryogenic container 100 is of a sealed double-shell structure, and a vacuum state is arranged between the double shells, so as to provide a low-temperature environment for high-voltage drainage in the superconducting cable 10, reduce consumption of electric energy and improve the electric energy conversion rate of the superconducting cable. The superconducting connection device 200 is used for assisting the superconducting cable 10 to extend to the inside of the terminal cryogenic container 100, ensuring the butt joint of the double-shell structure of the terminal cryogenic container 100 and the superconducting Dewar structure 19 in the superconducting cable 10, and simultaneously ensuring good sealing performance at the connection position of the superconducting cable 10 and the terminal cryogenic container 100. The current guiding device 300 is used for guiding high voltage electricity in the superconducting cable 10 to an external power grid.
In one embodiment, superconducting coupling device 200 is coupled to superconducting cryogenic container 100 by welding.
In another embodiment, superconducting coupling device 200 is coupled to superconducting cryogenic vessel 100 by a Dewar coupling.
In one embodiment, superconducting connection device 200 is connected to superconducting dewar structure 19 in superconducting cable 10 by welding.
To facilitate placement of superconducting joint 200 and bushing joint 500 on terminal cryogen vessel 100, in one preferred embodiment, frame structure 110 is a square frame and housing structure 120 is a semi-cylindrical housing double-housing structure that abuts frame structure 110.
In order to ensure tightness, in one embodiment, the frame structure 110 and the housing structure 120 are connected by welding.
In order to ensure tightness, the detachable connection is achieved, and in one preferred embodiment, the frame structure 110 and the housing structure 120 are connected by a dewar structure. Specifically, the edge of the frame structure 110 connected to the housing structure 120 is configured as a dewar structure, and the sealing and detachable connection is realized through the dewar structure.
In the three-phase coaxial superconducting cable terminal system, the terminal low-temperature container adopts the connected frame structure and shell structure design, so that the electric connection and Dewar installation of the superconducting connection device, the drainage device and the sleeve assembly in the system are convenient, and the operation is simple and convenient and the reliability is high. Meanwhile, the split design of the terminal low-temperature container is convenient for maintenance and replacement in the use process.
In one embodiment, as can be seen from fig. 3 and 4, the frame structure 110 includes an inner support frame 111 and an outer support frame 112, and a first cavity (not shown) is formed between the inner support frame 111 and the outer support frame 112, wherein a space for distributing the superconducting connection device 200, the superconducting cable 10 and the sleeve assembly is provided in the first cavity. In particular, superconducting joint 200 assists in extending superconducting cable 10 through the first cavity into terminal cryogen vessel 100, and sleeve joint 500 assists in extending sleeve 400 through the first cavity into terminal cryogen vessel 100.
The housing structure 120 includes an inner housing 121 and an outer housing 122, with a second cavity (not shown) formed between the inner housing 121 and the outer housing 122, the first cavity and the second cavity constituting a cavity between the two housings in the terminal cryogenic container 100. The first cavity and the second cavity are not filled with substances and are in a vacuum state, so that heat exchange between the inside and the outside of the terminal low-temperature container 100 is avoided, and the low-temperature environment inside the terminal low-temperature container 100 is further realized. The inner housing 121 is connected to the inner support frame 111 to form a closed housing structure, and the outer housing 122 is connected to the outer support frame 112 to form another closed housing structure that is wrapped around the outer portion of the inner housing 121 and the inner support frame 111.
Since the superconducting connection device 200 and the bushing connection device 500 are installed in the first cavity, in order to avoid the influence of the adjustment of the superconducting connection device 200 and the bushing connection device 500 on the vacuum degree between the double shells of the whole terminal cryogenic container 100, that is, the influence on the first cavity and the second cavity, in one preferred embodiment, a baffle (not shown) is provided between the first cavity and the second cavity. The baffle is used for separating the first cavity and the second cavity in the double-shell structure of the terminal cryogenic container 100, namely, the installation and adjustment processes of the superconducting connection device 200 and the sleeve connection device 500 can not influence the vacuum degree and the like in the second cavity, so that the adjustment difficulty and the adjustment cost of the superconducting connection device 200 and the sleeve connection device 500 are reduced.
To prevent the existence of adiabatic cold bridges or dead spots in the double housing structure of the terminal cryogenic container 100, in one preferred embodiment, a communication between the first cavity and the second cavity is provided. The three-phase coaxial superconducting cable terminal system simplifies the equipment structure and reduces the operation difficulty by only one set of vacuumizing system.
In the three-phase coaxial superconducting cable terminal system, when the terminal low-temperature container is of a double-shell structure, a first cavity used for distributing the superconducting connection device, the superconducting cable and the sleeve assembly is formed between the inner support frame and the outer support frame, and the superconducting connection device, the superconducting cable, the sleeve assembly and the frame structure are electrically connected or installed in the open first cavity, so that the terminal low-temperature container is convenient to operate and reliable to connect. Meanwhile, the inner shell is connected with the inner supporting frame, and the outer shell is connected with the outer supporting frame, so that a double-shell structure of the terminal low-temperature container is obtained, the vacuum degree of the first cavity and the second cavity is guaranteed, and the heat preservation effect of the terminal low-temperature container is improved.
In one embodiment, the frame structure 110 has a frame eversion 130 at its edge and the housing structure 120 has a housing eversion 140 at its edge. The frame eversion 130 is connected to the housing eversion 140 to effect connection of the frame structure 110 to the housing structure 120.
In one specific implementation, as shown in fig. 6 and 7, the frame eversion 130 includes a first frame eversion 131 and a second frame eversion 132, and the housing eversion 140 includes a first housing eversion 141 and a second housing eversion 142. The first frame everting portion 131 is disposed at an edge of the inner support frame 111, the second frame everting portion 132 is disposed at an edge of the outer support frame 112, the first casing everting portion 141 is disposed at an edge of the inner casing 121, and the second casing everting portion 142 is disposed at an edge of the outer casing 122. The first frame everting portion 131 is abutted against the first casing everting portion 141, and the second frame everting portion 132 is abutted against the second casing everting portion 142, so as to realize connection of the frame structure and the casing structure.
To ensure tightness, in one embodiment, the frame flip-out 130 is welded to the housing flip-out 140 to connect the frame structure 110 to the housing structure 120.
To achieve a detachable connection of the frame structure 110 to the housing structure 120 while ensuring tightness, in one of the preferred embodiments the frame flip-out 130 is connected to the housing flip-out 140 by a dewar structure to achieve a connection of the frame structure 110 to the housing structure 120.
In the three-phase coaxial superconducting cable terminal system, the frame everting part is arranged at the edge of the frame structure, the shell everting part is arranged at the edge of the shell structure, and the frame structure and the shell structure are conveniently connected through the frame everting part and the shell everting part, so that the operation difficulty is reduced, and the sealing effect is improved.
In one embodiment, as shown in fig. 5, the drainage device 300 includes a belt drainage structure 310 that mates with the superconductive belts (top layer superconductive belt 12, middle layer superconductive belt 13, and bottom layer superconductive belt 14) in the superconductive cable 10, or the drainage device 300 includes a shield drainage structure 320 that mates with the super-shield layers (outer shield metal belt 11 and inner shield metal belt 15) in the superconductive cable.
Specifically, the belt drainage structure 310 is used for transmitting high-voltage power in the superconducting cable to an external power grid, and the shielding drainage structure 320 is used for realizing grounding of an outer shielding layer and an inner shielding layer in the superconducting cable 10, so that safety in the drainage process is ensured.
According to the three-phase coaxial superconducting cable terminal system, the electric energy conducted by the three-phase coaxial superconducting cable is transmitted to an external power grid or a three-phase single-core superconducting cable through the belt drainage structure, and the three-phase coaxial superconducting cable terminal system is connected with the inner shielding metal belt and the outer shielding metal belt in the superconducting cable through the shielding drainage structure, so that the safety in the drainage process is ensured.
In one embodiment, as shown in fig. 11 and 12, the belt drainage structure 310 includes a first adapter component 311, adhesive material, a first drainage component 312, and a first drainage connector component 313. Wherein a first transfer cavity (not shown) is formed in the first transfer assembly 311, wherein the first transfer cavity is used for placing tape structures in the superconducting cable 10, such as a top superconducting tape 12, a middle superconducting tape 13, and a bottom superconducting tape 14. The adhesive material is filled in the first transferring cavity and used for adhering the first transferring component 311 and the belt structure, the first drainage component 312 is electrically connected with the first transferring component 311, and the first drainage connecting component 313 is arranged between the first transferring component 311 and the first drainage component 312 and used for fixedly connecting the first transferring component 311 and the first drainage component 312.
To simplify the construction, in one embodiment, as shown in fig. 12, the first drain connector assembly 313 is a bolt.
In one embodiment, as shown in fig. 11 and 12, the first adapter assembly 311 includes a first inner guard ring 3111 and a first outer guard ring 3112, the first inner guard ring 3111 and the first outer guard ring 3112 together forming a first adapter cavity.
To mitigate the effect of stress on the conductive properties of the superconducting cable, in one embodiment, as shown in fig. 11 and 12, the belt drainage structure 310 further includes a first stress relief assembly 314.
In one specific embodiment, as shown in fig. 13 and 14, the shielding drainage structure 320 includes a second switching component 321, a second drainage component 322, and a second drainage connection component 323.
Wherein a second transfer cavity (not shown) is formed in the second transfer assembly for placing tape structures in the superconducting cable 10, such as the outer shielding metal tape 11 and the inner shielding metal tape 15. The second drainage component 322 is electrically connected with the second switching component 321, the second drainage connecting component 323 is arranged between the second switching component 321 and the second drainage component 322 and is used for fixedly connecting the second switching component 321 with the second drainage component 322, and the fastening component 3212 is used for fastening and connecting the second switching component 321 with a belt structure in the superconducting cable 10.
To simplify the construction, in one embodiment, as shown in fig. 14, the second drain connector assembly 323 is a bolt.
In one particular embodiment, as shown in fig. 14, the second adaptor assembly 321 includes a second inner guard ring 3211 and a fastening assembly 3212. The securing assembly 3212 is a hoop or clamp. Specifically, the fastening assembly 3212 includes a clip member 3213 and a fastening member 3214, where the fastening member 3214 is a bolt and a nut.
To mitigate the effect of stress on the conductive properties of the superconducting cable, in one embodiment, the shield drain structure 320 further includes a second stress relief assembly 324.
According to the belt drainage structure in the three-phase coaxial superconducting cable terminal system, the belt structure is firmly embedded into the first transfer cavity of the first transfer assembly through the adhesive material, so that the first transfer assembly is stably connected with the superconducting cable, and the working stability of an external power grid is improved. Meanwhile, the adhesion of the adhesive material is realized through melting and solidification, so that the installation steps of the superconducting cable drainage device are simplified, and the installation difficulty is reduced.
In one embodiment, as shown in fig. 4 and 5, the cannula assembly includes a cannula 400 and a cannula coupling device 500. The bushing 400 is used to interface with an external power grid. The sleeve connection device 500 is used for assisting the sleeve 400 to extend towards the inside of the terminal cryogenic container 100, ensuring the butt joint of the double-shell structure of the terminal cryogenic container 100 and the hollow structure of the sleeve 400, and simultaneously ensuring the tightness of the connection position of the sleeve 400 and the terminal cryogenic container 100. The bushing 400 includes a high voltage bushing 410 and a ground bushing 420. Wherein, one end of the high-voltage sleeve 410 is connected with the belt drainage structure 310, and the other end is connected with the power grid; the ground sleeve 420 has one end connected to the shield drain structure 320 and the other end grounded. The bushing connection 500 includes a high voltage connection assembly 510 and a ground connection assembly 520; the high-voltage connection assembly 510 is disposed on the terminal cryogenic container 100, and is used for penetrating the high-voltage bushing 410, so that the high-voltage bushing 410 extends into the terminal cryogenic container 100. The ground connection assembly 520 is disposed on the terminal cryogenic container 100 and is configured to pass through the ground sleeve 420 such that the ground sleeve 420 extends into the terminal cryogenic container 100.
In one embodiment, as shown in fig. 8, superconducting joint 200 includes superconducting inner dewar tube 210, superconducting outer dewar tube 220, and superconducting joint assembly 230. Wherein superconducting Dewar inner tube 210 interfaces with superconducting cable Dewar structure 19 to form a superconducting cable seal housing. The superconducting Dewar outer tube 220 interfaces with the frame structure 110 of the terminal cryogenic container 100 to form a terminal containment vessel having a through-hole communicating the interior with the exterior of the terminal cryogenic container 100. The superconducting cable seal case passes through the through-hole and abuts against the terminal seal case, and extends toward the inside of the terminal cryocontainer 100. Superconducting joint assembly 230 is used to fixedly connect superconducting inner dewar tube 210 with superconducting outer dewar tube 220.
In one specific embodiment, the superconducting cable sealing shell passes through the through hole to be abutted against the terminal sealing shell and extends towards the inside of the terminal dewar structure, namely, the first sealing cavity 800 and the second sealing cavity 900 are partially overlapped along the extending direction of the superconducting cable dewar structure 19, so that the superconducting cable dewar structure 19 and the terminal dewar structure are fully overlapped, and blind spots at the joint of the superconducting cable dewar structure 19 and the terminal dewar structure are eliminated. The superconducting connection assembly 230 is disposed between the superconducting inner dewar tube 210 and the superconducting outer dewar tube 220, and is used for connecting the superconducting inner dewar tube 210 and the superconducting outer dewar tube 220. The connection may be a fixed connection, and further, the fixed connection may be a detachable connection or a non-detachable connection.
As shown in fig. 9 and 10, superconducting inner dewar tube 210 includes superconducting inner dewar tube 210 and superconducting inner cable dewar flange 213. Wherein, superconductive Dewar inner tube 210 covers the end of superconductive cable Dewar structure 19, superconductive Dewar inner tube 210 and superconductive cable Dewar structure 19 together form superconductive cable seal housing.
As shown in fig. 9 and 10, the superconducting dewar outer tube 220 includes an outer tube 222 of the superconducting dewar outer tube and a superconducting cable dewar outer flange 223. Wherein, the outer tube 222 of the superconducting Dewar outer tube covers the opening of the terminal Dewar structure along the thickness direction, and the outer tube 222 of the superconducting Dewar outer tube and the terminal Dewar structure together form a terminal sealing shell.
The superconducting cable dewar outer flange 223 is provided on the outer tube 222 of the superconducting dewar outer tube, and the superconducting cable dewar inner flange 213 and the superconducting cable dewar outer flange 223 are juxtaposed along the extending direction of the superconducting connection assembly 230. The superconducting cable dewar outer flange 223 is fixedly connected with the superconducting cable dewar inner flange 213 through a superconducting connection assembly 230.
In one preferred embodiment, as shown in fig. 9, superconducting joint assembly 230 includes a nut 231 and a bolt 232.
The dewar structure connection means also comprises a sealing ring 250. Wherein sealing ring 250 is disposed between superconducting cable dewar inner tube 210 and superconducting cable dewar inner flange 213. According to the Dewar structure connecting device, the sealing performance between the outer tube of the superconducting Dewar inner tube and the flange plate in the superconducting cable Dewar is improved through the sealing part.
In one embodiment, as shown in fig. 8, an insulating layer 240 is provided inside the superconducting inner dewar tube 210 and/or the outer tube 222 of the superconducting outer dewar tube. By laying a thermal insulation layer 240 inside the superconducting inner dewar tube 210 and/or the outer tube 222 of the superconducting outer dewar tube.
In one preferred embodiment, the insulating layer 240 is made of aluminum foil and fiberglass cloth. Wherein, the aluminium foil is used for protecting against radiation, and glass fiber cloth is used for preventing heat transfer.
As shown in fig. 9, the superconducting inner dewar tube 210 includes an inner tube 211 of the superconducting inner dewar tube, an outer tube 212 of the superconducting inner dewar tube, and a superconducting inner dewar tube sealing ring 214. The inner tube 211 of the inner tube of the superconducting Dewar is arranged at the end part of the inner tube 211 of the inner tube of the superconducting Dewar, the outer tube 212 of the inner tube of the superconducting Dewar is sleeved outside the inner tube 211 of the inner tube of the superconducting Dewar and is abutted to one end of the flange 213 of the inner tube of the superconducting cable opposite to the outer tube 212 of the inner tube of the superconducting Dewar, and the sealing ring 214 of the inner tube of the superconducting Dewar is arranged between the inner tube 211 of the inner tube of the superconducting Dewar and the outer tube 212 of the inner tube of the superconducting Dewar. The superconducting cable Dewar structure 19, the superconducting cable Dewar inner flange 213, the inner tube 211 of the superconducting Dewar inner tube, the outer tube 212 of the superconducting Dewar inner tube and the sealing ring 214 of the superconducting Dewar inner tube form a superconducting cable sealing shell. Specifically, the inner tube 211 of the superconducting Dewar inner tube, the outer tube 212 of the superconducting Dewar inner tube, the first connection portion 12, the inner tube 211 of the superconducting Dewar inner tube, the outer tube 212 of the superconducting Dewar inner tube, and the superconducting Dewar inner tube seal ring 214 constitute a superconducting cable seal case.
As shown in fig. 9, the superconducting Dewar outer tube 220 includes an inner tube 221 of the superconducting Dewar outer tube and an outer tube 222 of the superconducting Dewar outer tube. Wherein, the inner tube 221 terminal surface of superconductive Dewar outer tube is fixed in terminal inner wall face, and the outer tube 222 of superconductive Dewar outer tube is overlapped in the inner tube 221 of superconductive Dewar outer tube, and the outer tube 222 terminal surface of superconductive Dewar outer tube is fixed in terminal outer wall face. Wherein the direction of extension of the low-temperature termination container 100 intersects with the direction of extension of the superconducting cable 10 or the low-temperature termination container 100 extends along the direction of extension of the superconducting cable 10. It is understood that the extending direction of the low temperature terminal container 100 refers to a direction in which the terminal outer wall surface in the low temperature terminal container 100 is directed toward the terminal inner wall surface.
In one preferred embodiment, the cannula coupling device 500 includes a cannula inner tube (not shown), a cannula outer tube (not shown), and a cannula coupling assembly (not shown). Wherein, the bushing Dewar inner tube is butted with the bushing 400 to form a bushing seal housing, the bushing Dewar outer tube is butted with the terminal cryogenic container 100 to form a terminal seal housing with a through hole, the bushing seal housing penetrates through the through hole and is butted with the terminal cryogenic container 100 and extends towards the inside of the terminal cryogenic container 100, and the bushing connection assembly is used for fixedly connecting the bushing 400 and the terminal cryogenic container 100.
According to the superconducting connection device in the three-phase coaxial superconducting cable terminal system, the superconducting cable sealing shell is formed by butt joint of the superconducting Dewar inner tube and the superconducting cable Dewar structure, the terminal sealing shell with the through hole communicated with the inside and the outside of the terminal low-temperature container is formed by butt joint of the superconducting Dewar outer tube and the frame structure, the superconducting cable sealing shell is sleeved on the terminal sealing shell, connection of the superconducting cable and the terminal low-temperature container is achieved, meanwhile perfect lap joint of the superconducting cable Dewar structure and the terminal Dewar structure is achieved, blind spots of connection positions of the superconducting cable and the terminal low-temperature container are eliminated, the heat preservation effect of the low-temperature cavity inside the superconducting cable is improved, consumption of low-temperature atmosphere is reduced, and use cost is reduced.
In one embodiment, as shown in fig. 5 and 15, the three-phase coaxial superconducting cable termination system described above includes a connection compliance plate 600. Wherein the drainage device 300 is connected with the sleeve assembly through the connection compliance plate 600. The connection compliance plate 600 is provided with a buffer structure 630, and the buffer structure 630 is used for buffering the acting force between the drainage device 300 and the sleeve assembly along the length direction of the superconducting cable 10.
To simplify the manner of operation, in one preferred embodiment, as shown in FIG. 15, the connection compliance plate 600 includes a first connection end 610 that mates with the output end of the drainage device 300 and a second connection end 620 that mates with the input end of the cannula 400. The first connection end 610 of the connection compliance plate 600 is connected to the output end of the drainage device 300, and the second connection end 620 is connected to the input end of the sleeve 400.
To further enhance the cushioning effect of the cushioning structure 630, in one embodiment, the cushioning structure 630 is an S-shaped structure.
In one embodiment, the buffer structure 630 may also be Z-shaped or W-shaped.
According to the three-phase coaxial superconducting cable terminal system, the connection flexible plate can overcome the defect that the superconducting cable is subjected to very large electromagnetic force and tiny deformation of cable insulation materials caused by cold and hot circulation when working at low temperature, so that the stable connection of the drainage device, the superconducting cable and the sleeve is realized, and the working stability is improved.
In one embodiment, as shown in fig. 5 and 16, the three-phase coaxial superconducting cable terminal system further includes a sleeve clamp 700, wherein the sleeve clamp 700 is provided at an output end of the drainage device 300, and is used for clamping an end of the sleeve 400 to connect the drainage device 300 with the sleeve 400. Specifically, the ferrule holder 700 includes a first holding portion 710, a second holding portion 720, and a holder fastening member 730. Wherein the first clamping portion 710 has a first clamping surface thereon. The second clamping portion 720 is provided with a second clamping surface, and the second clamping surface and the first clamping surface together form a clamping cavity for clamping the sleeve assembly. The clamp fastening part 730 is used for connecting the first clamping part 710 and the second clamping part 720.
In one embodiment, as shown in fig. 5, the three-phase coaxial superconducting cable termination system further includes a vacuum pumping device 800. The vacuumizing device 800 is used for pumping air between the first cavity and the second cavity so as to ensure the vacuum degree of the first cavity and the second cavity.
In one embodiment, as shown in fig. 5 and 17, the three-phase coaxial superconducting cable terminal system further includes a liquid nitrogen tank connection device 900. The liquid nitrogen tank connecting device 900 comprises a liquid nitrogen tank fixing seat 910 and a liquid nitrogen tank fixing nail 920. The liquid nitrogen tank gas inlet is fixed inside the terminal cryogenic container 100 through the liquid nitrogen tank connecting device 900, so that air in the terminal cryogenic container 100 is conveniently discharged and liquid nitrogen is filled.
For ease of movement, as shown in fig. 5 and 18, in one embodiment, the three-phase coaxial superconducting cable termination system further includes a wheel carriage assembly 1000.
Specifically, the wheel carriage assembly 1000 includes a support frame 1010, a pulley 1020, and a support bar 1030. The supporting rods 1030 pass through supporting holes (not shown) on the supporting frame 1010, the number of pulleys 1020 is two, the pulleys are respectively arranged at two ends of the supporting rods 1030, and the supporting frame 1010 is abutted against the lower surface of the terminal cryogenic container 100.
According to the three-phase coaxial superconducting cable terminal system, the sleeve clamp is convenient for clamping the sleeve assembly, and stable and detachable connection of the drainage device and the sleeve assembly is realized.
In one embodiment, a method of assembling a coaxial superconducting cable termination system includes the steps of:
step 1: the frame structure 110 is assembled.
Step 2: the superconducting Dewar outer tube 220 in the superconducting joint 200 is mounted to the frame structure 110.
Step 3: the superconducting inner dewar tube 210 in the superconducting connection device 200 is mounted to the terminal end of the superconducting cable 10, and the superconducting inner dewar tube 210 is fitted inside the superconducting outer dewar tube 220.
Step 4: the sleeve assembly is mounted to the frame structure 110.
Step 5: a drainage device 300 is installed on the superconducting cable 10 in the terminal cryogenic container 100.
Step 6: the output of the drainage device 300 is connected to the input of the cannula assembly.
Step 7: connecting the housing structure 120 with the frame structure 110.
In one preferred embodiment, the sleeve assembly includes a sleeve 400 and a sleeve connection 500. Wherein, step 4: the sleeve assembly is mounted to the frame structure 110, and specifically comprises the following steps:
step 41: the sleeve dewar outer tube in the sleeve connection 500 is mounted to the frame structure 110.
Step 42: the sleeve Dewar inner tube of the sleeve connection device is sleeved on the sleeve 400.
Step 43: the installation of the sleeve assembly on the frame structure 110 is completed by sleeving the sleeve dewar inner tube inside the sleeve dewar outer tube.
According to the assembling method of the three-phase coaxial superconducting cable terminal system, the sleeve pipe Dewar outer tube in the superconducting connecting device is firstly installed on the frame structure, then the superconducting cable and the sleeve pipe are installed and electrically connected with the terminal low-temperature container through the superconducting connecting device, and finally the shell structure is connected with the frame structure to ensure the heat preservation effect of the terminal low-temperature container. The method is used for assembling the system in a reasonable operation space, and the operation difficulty is low.
In one embodiment, step 1 further comprises mounting the wheel carriage assembly 1000 and the vacuum nozzle assembly to the frame structure 110.
In one embodiment, the method for assembling the three-phase coaxial superconducting cable terminal system includes the following steps:
step 1: the inner support frame 111, the outer support frame 112, the superconducting Dewar outer tube 220, the sleeve Dewar outer tube, the wheel carriage assembly 1000, the evacuating device 800, and the like are fixedly connected by welding.
Step 2: the sleeve 400 and the sealing ring are arranged on the inner pipe of the sleeve Dewar through the bolt and nut sleeve;
step 3: the sleeve Dewar outer tube is fixedly connected with the sleeve Dewar inner tube through the bolt and nut sleeve and the sealing ring.
Step 4: the liquid nitrogen tank connecting means 900 is welded to the inside vertical surface of the terminal cryogenic container 100.
Step 5: welding the inner tube 211 of the superconducting Dewar inner tube 210 with the superconducting cable superconducting Dewar structure 10; a heat insulating layer 240 is wound outside the inner tube 211 of the superconducting Dewar inner tube 210; welding the inner flange 213 of the superconducting cable dewar with the outer dewar tube 17 of the superconducting cable dewar structure 19; then the inner flange 213 of the superconducting cable Dewar is welded with the outer tube 212 of the inner tube 210 of the superconducting Dewar; the outer tube 212 of the superconducting inner tube 210 and the inner tube 211 of the superconducting inner tube 210 are welded closed by the superconducting inner tube sealing ring 214.
Step 6: the second inner protection ring 3211 is sleeved into the superconducting cable 10, the outer shielding metal belt 11 is inserted into the second switching cavity, and the fastening component 323 is sleeved on the outer shielding metal belt 11 for fastening; the second drainage assembly 322 is bolted to the second adapter assembly 321 and the second stress relief assembly 324 is then screwed against the second drainage assembly 322.
Step 7: sheathing the first inner guard ring 3111 into the superconducting cable 10, inserting the belt structure such as the top-layer superconducting belt 12, the middle-layer superconducting belt 13, or the bottom-layer superconducting belt 14 into the first transfer cavity, and injecting an adhesive material into the first transfer cavity to fasten the belt structure and the first transfer assembly 311; the first drainage assembly 312 is bolted to the first adapter assembly 311, and the first stress relief assembly 314 is screwed against the first drainage assembly 312. The connection of the top superconductive belt 12, the middle superconductive belt 13, and the bottom superconductive belt 14 to the corresponding belt drainage structures 310 is completed in sequence.
Step 8: the second inner protection ring 3211 is sleeved into the superconducting cable 10, the inner shielding metal belt 15 is inserted into the second switching cavity, and the fastening component 323 is sleeved on the inner shielding metal belt 15 for fastening; the second drainage assembly 322 is bolted to the second adapter assembly 321 and the second stress relief assembly 324 is then screwed against the second drainage assembly 322.
Step 9: the sealing ring is sleeved on the flange plate on the superconducting cable 10, the relative positions of the superconducting cable dewar inner flange plate 213 on the superconducting cable 10 and the superconducting cable dewar outer flange plate 223 on the terminal cryogenic container 100 are adjusted, and the superconducting cable 10 and the terminal cryogenic container 100 are fixed.
Step 10: the liquid nitrogen pipe 16 mounted on the superconducting cable 10 is screwed on the liquid nitrogen tank fixing nail 920, and the liquid nitrogen tank fixing nail 920 is sleeved on the liquid nitrogen tank fixing seat 910.
Step 11: the superconducting Dewar inner tube 210 and the superconducting Dewar outer tube 220 are fastened by a nut and bolt sleeve, and the fastening state of the liquid nitrogen tank fixing nails 920 is adjusted.
Step 12: the cannula holder 700 and the connection compliance plate 600 are connected to the corresponding cannula 400 and the corresponding drainage device 300 by means of bolts and nuts.
Step 13: the inner support frame 111 is connected with the inner housing 121, and a heat insulating layer is wrapped around the outside of the support frame and the inner housing.
Step 14: the outer support frame 112 is connected to the outer housing 122 to complete the assembly of the three-phase coaxial superconducting cable termination system.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A three-phase coaxial superconducting cable termination system, comprising:
the terminal low-temperature container comprises a frame structure and a shell structure which are connected;
the superconducting connection device is arranged on the frame structure and used for penetrating a superconducting cable so as to enable the superconducting cable to extend into the terminal low-temperature container;
the drainage device is arranged in the terminal low-temperature container, and the input end of the drainage device is connected with the output end of the superconducting cable; the drainage device comprises a belt drainage structure matched with a superconducting belt in the superconducting cable, or the drainage device comprises a shielding drainage structure matched with a super shielding layer in the superconducting cable; the shielding drainage structure comprises a second switching assembly, a second drainage assembly and a second drainage connecting assembly, wherein a second switching cavity is formed in the second switching assembly; the second transfer cavity is used for placing a belt structure in the superconducting cable; the second drainage component is electrically connected with the second switching component; the second drainage connecting assembly is arranged between the second switching assembly and the second drainage assembly and is used for fixedly connecting the second switching assembly and the second drainage assembly;
The sleeve assembly is arranged on the frame structure, extends into the terminal low-temperature container and is connected with the output end of the drainage device; the bushing assembly comprises a bushing-bushing connecting device, and the bushing comprises a high-voltage bushing and a grounding bushing; one end of the high-voltage sleeve is connected with the belt drainage structure, and the other end of the high-voltage sleeve is connected with a power grid; one end of the grounding sleeve is connected with the shielding drainage structure, and the other end of the grounding sleeve is grounded;
the sleeve connecting device comprises a high-voltage connecting component and a grounding connecting component; the high-voltage connecting assembly is arranged on the terminal low-temperature container and used for penetrating the high-voltage sleeve so that the high-voltage sleeve extends into the terminal low-temperature container; the grounding connection assembly is arranged on the terminal low-temperature container and used for penetrating the grounding sleeve so that the grounding sleeve extends to the inside of the terminal low-temperature container;
the flexible connection plate is used for buffering acting force between the drainage device and the sleeve assembly along the length direction of the superconducting cable.
2. The three-phase coaxial superconducting cable termination system of claim 1 wherein the frame structure includes an inner support frame and an outer support frame, the inner support frame and the outer support frame defining a first cavity therebetween; the shell structure comprises an inner shell and an outer shell, and a second cavity is formed between the inner shell and the outer shell; the inner shell is connected with the inner support frame, and the outer shell is connected with the outer support frame.
3. The three-phase coaxial superconducting cable termination system of claim 1, wherein the edge of the frame structure is provided with a frame eversion and the edge of the housing structure is provided with a housing eversion; the frame everting portion is connected with the housing everting portion.
4. The three-phase coaxial superconducting cable termination system of claim 1, wherein the connection compliance plate includes a first connection end mated with the output end of the current-guiding device and a second connection end mated with the input end of the sleeve, the connection compliance plate first connection end being connected with the output end of the current-guiding device, the connection compliance plate second connection end being connected with the input end of the sleeve.
5. The three-phase coaxial superconducting cable termination system of claim 1 further comprising a ferrule holder disposed at an output end of the drainage device, comprising:
the first clamping part is provided with a first clamping surface;
the second clamping part is provided with a second clamping surface; the second clamping surface and the first clamping surface together form a clamping cavity for clamping the sleeve assembly;
and the clamp fastening component is respectively connected with the first clamping part and the second clamping part.
6. The three-phase coaxial superconducting cable termination system of claim 1 wherein the belt drainage structure further comprises a first stress relief assembly.
7. The three-phase coaxial superconducting cable termination system of claim 1 wherein the shield drainage structure further comprises a second stress relief assembly.
8. The three-phase coaxial superconducting cable termination system of claim 1 wherein the second drainage connection assembly is a bolt.
9. The three-phase coaxial superconducting cable termination system of claim 1 wherein the frame structure and the housing structure are connected by welding.
10. A method of assembling a three-phase coaxial superconducting cable termination system, for assembling a three-phase coaxial superconducting cable termination system according to any one of claims 1-9, comprising:
assembling a frame structure;
mounting the superconducting Dewar outer tube in the superconducting connection to the frame structure;
mounting a superconducting Dewar inner tube in a superconducting connection device to a terminal of a superconducting cable, and sleeving the superconducting Dewar inner tube in the superconducting Dewar outer tube;
mounting a sleeve assembly to the frame structure;
installing a drainage device on the superconducting cable in a terminal cryogenic container;
connecting the output end of the drainage device with the input end of the sleeve component;
connecting the housing structure with the frame structure.
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| CN112072606A (en) | 2020-12-11 |
| CN114284764B (en) | 2023-07-07 |
| CN112072606B (en) | 2021-12-07 |
| CN114156829A (en) | 2022-03-08 |
| CN114284764A (en) | 2022-04-05 |
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