CN112072606A - 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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- 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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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; a superconducting connection device provided on the frame structure for penetrating a superconducting cable so that the superconducting cable extends to the inside of the terminal cryogenic container; the drainage device is arranged inside 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 pipe assembly is arranged on the frame structure, extends towards the interior of the terminal low-temperature container and is connected with the output end of the drainage device. The terminal low-temperature container in the invention adopts the connected frame structure and shell structure design, thereby facilitating the electrical connection and dewar installation of the superconducting connecting device, the drainage device, the sleeve and the sleeve connecting device in the system, having simple and convenient operation and high reliability, and being convenient for maintenance and replacement in the using process.
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 assembling method thereof.
Background
The superconducting cable has high-current transmission capacity, is produced by adopting a second-generation superconducting strip, is connected to 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 in addition to the superconducting cable.
At present, a superconducting cable terminal is arranged in a terminal low-temperature container with a double-shell structure, and because the superconducting cable, a sleeve and the terminal low-temperature container all need to ensure a low-temperature environment, the superconducting cable, the sleeve and the terminal low-temperature container need to penetrate in and out of the terminal low-temperature container in the connecting process, the whole overlapping process and the fixing process are complex, and the operation is not easy in the terminal low-temperature container with the double-shell structure.
Disclosure of Invention
In view of the above, it is desirable to provide a three-phase coaxial superconducting cable termination system and an assembling method thereof, which can easily handle the connection process between the superconducting cable and the sleeve and the termination cryogenic 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;
a superconducting connection device provided on the frame structure for penetrating a superconducting cable so that the superconducting cable extends toward the inside of the terminal cryogenic container;
the drainage device is arranged inside 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 pipe assembly is arranged on the frame structure, extends towards the interior of the terminal low-temperature container and is connected with the output end of the drainage device.
Preferably, in one embodiment, the frame structure comprises an inner support frame and an outer support frame forming 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.
Preferably, in one of the embodiments, the edge of the frame structure is provided with a frame evagination, and the edge of the shell structure is provided with a shell evagination; the frame evagination part is connected with the shell evagination part.
Preferably, in one of the embodiments, the flow guiding device comprises a belt flow guiding structure cooperating with a superconducting belt in the superconducting cable, or the flow guiding device comprises a shielding flow guiding structure cooperating with a super-shielding layer in the superconducting cable.
Preferably, in one embodiment, the belt drainage structure comprises:
a first transition assembly formed with a first transition cavity; the first transition cavity is used for placing a belt structure in the superconducting cable;
the pasting material is filled in the first transfer cavity and used for pasting the first transfer assembly and the belt structure;
the first drainage assembly is electrically connected with the first switching assembly;
first drainage coupling assembling, first drainage coupling assembling locates first switching subassembly with between the first drainage subassembly, be used for fixed connection first switching subassembly with first drainage subassembly.
Preferably, in one of the embodiments, the bushing assembly comprises a bushing and bushing connection, the bushing comprising a high voltage bushing and a ground bushing; one end of the high-voltage bushing is connected with the belt drainage structure, and the other end of the high-voltage bushing 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 assembly and a grounding connecting assembly; the high-voltage connecting assembly is arranged on the terminal low-temperature container and is used for penetrating the high-voltage bushing so as to enable the high-voltage bushing to extend towards the interior of 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 towards the interior of the terminal low-temperature container.
Preferably, in one embodiment, the superconducting connection device includes:
the superconducting Dewar inner pipe is butted with the superconducting cable Dewar structure to form a superconducting cable sealing shell;
the superconducting Dewar outer pipe is butted with the frame structure to form a terminal sealing shell with a through hole for communicating the inside and the outside of the terminal low-temperature container; the superconducting cable sealing shell penetrates through the through hole and abuts against the terminal low-temperature container, and extends towards the interior of the terminal low-temperature container;
and the superconducting connecting assembly is used for fixedly connecting the superconducting Dewar inner pipe and the superconducting Dewar outer pipe.
Preferably, in one embodiment, the three-phase coaxial superconducting cable termination system further includes:
the connection flexible plate, the drainage device with the thimble assembly passes through the connection flexible plate links to each other, be equipped with buffer structure in the connection flexible plate, buffer structure is used for the buffering the drainage device with follow between the thimble assembly superconducting cable length direction's effort.
Preferably, in one embodiment, the above three-phase coaxial superconducting cable termination system further includes a casing clamp, where the casing clamp is disposed at the output end of the current guiding device, and includes:
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 jointly form a clamping cavity for clamping the sleeve assembly;
and the clamp fastening component is connected with the first clamping part and the second clamping part respectively.
A method of assembling a three-phase coaxial superconducting cable termination system, comprising:
assembling the frame structure;
mounting a superconducting Dewar outer tube in a superconducting connection device onto a frame structure;
installing a superconducting Dewar inner pipe in a superconducting connecting device to a terminal of a superconducting cable, and sleeving the superconducting Dewar inner pipe in a superconducting Dewar outer pipe;
mounting a bushing assembly to the frame structure;
installing a current guiding device on the superconducting cable in the terminal cryogenic container;
connecting the output end of the drainage device with the input end of the sleeve assembly;
connecting the housing structure with the frame structure.
In the three-phase coaxial superconducting cable terminal system, the terminal low-temperature container adopts the design of the connected frame structure and shell structure, so that the electrical connection and Dewar installation of the superconducting connecting device, the drainage device and the drainage device in the system and the sleeve assembly are facilitated, the operation is simple and convenient, and the reliability is high. Meanwhile, due to the split design of the terminal low-temperature container, the maintenance and the replacement in the use process are facilitated.
The assembling method of the three-phase coaxial superconducting cable terminal system comprises the steps of firstly installing a superconducting Dewar outer pipe in a superconducting connecting device and a sleeve Dewar outer pipe in a sleeve connecting device on a frame structure, then realizing the installation and the electrical connection of the superconducting cable, the sleeve and a terminal low-temperature container through the superconducting connecting device and the sleeve connecting device, and finally connecting a shell structure with the frame structure to ensure the heat preservation effect of the terminal low-temperature container. The method has the advantages that the system is assembled in a reasonable operation space, and the operation difficulty is low.
Various specific structures of the present application, as well as the functions 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 according to an embodiment of the present application;
fig. 2 is a perspective view of a three-phase coaxial superconducting cable termination system according to an embodiment of the present application;
fig. 3 is a cross-sectional view of a three-phase coaxial superconducting cable termination system according to an 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 of an internal structure of a terminal system of a three-phase coaxial superconducting cable according to an embodiment of the present application;
fig. 6 is a perspective view showing an internal structure of a terminal system of a three-phase coaxial superconducting cable according to an embodiment of the present invention;
FIG. 7 is a schematic view of the shell and eversion in one embodiment of the present application;
FIG. 8 is a perspective view of a superconducting joint in one embodiment of the present application;
FIG. 9 is an exploded view of a superconducting joint arrangement according to one embodiment of the present application;
FIG. 10 is a cross-sectional view of a superconducting joint in 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 drainage structure according to one embodiment of the present application;
FIG. 13 is a perspective view of a shielding drainage structure according to one embodiment of the present application;
FIG. 14 is an exploded view of a shield and drain structure according to one embodiment of the present application;
FIG. 15 is a perspective view of an attachment flex plate according to one embodiment of the present application;
FIG. 16 is an exploded view of a casing clamp according to one embodiment of the present application;
FIG. 17 is an exploded view of a liquid nitrogen container attachment apparatus according to one embodiment of the present application;
fig. 18 is an exploded view of the wheel carriage assembly in one embodiment of the present application.
Wherein, in the reference numeral, 10-superconducting cable; 11-an outer shielding metal strip; 12-top layer superconducting tape; 13-intermediate layer superconducting tape; 14-underlying superconducting tape; 15-inner shielding metal band; 16-liquid nitrogen tube; 17-superconducting cable outer dewar pipe; 18-superconducting cable inner dewar tube; 19-superconducting cable dewar structure; 100-terminal cryogenic vessel; 110-a frame structure; 111-internal support frame; 112-an outer support frame; 120-a housing structure; 121-an inner housing; 122-an outer shell; 130-frame eversion; 131-a first frame evagination; 132-a second frame evagination; 140-shell eversion; 141-a first shell eversion; 142-a second shell eversion; 200-a superconducting connection; 210-superconducting dewar inner tube; 211-inner tube of superconducting dewar inner tube; 212-outer tube of superconducting dewar inner tube; 213-superconducting cable Dewar inner flange; 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 a superconducting dewar outer tube; 223-superconducting cable Dewar external flange; 230-a superconducting connection assembly; 231-a nut; 232-bolt; 240-a thermal insulation layer; 250-a sealing ring; 300-a 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 flow directing assembly; 313-a first drainage connection assembly; 314-a first stress relief component; 320-shielding the drainage structure; 321-a second adapter assembly; 3211-a second inner guard ring; 3212-a fastening assembly; 3213-a band part; 3214-a fastening member; 322-a second flow directing assembly; 323-a second drainage connection assembly; 324-a second stress relief assembly; 400-a cannula; 410-high voltage bushing; 420-a ground sleeve; 500-a cannula connection device; 510-a high voltage connection assembly; 520-a ground connection assembly; 600-connecting a flexible board; 610-a first connection end; 620-second connection end; 630-a buffer structure; 700-casing clamp; 710-a first clamping portion; 720-a second clamping portion; 730-a clamp fastening member; 800-vacuum pumping device; 900-liquid nitrogen tank connecting device; 910-liquid nitrogen container fixing seat; 920-liquid nitrogen tank fixing nails; 1000-wheel carrier assembly; 1010-a support frame; 1020-a pulley; 1030-support bar.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique 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 intermediate 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 set of all structures within the band structure in the current state. For example, if the belt structure is the outer shielding metal belt 11, the internal structure is all other structures inside the outer shielding metal belt 11, and if the belt structure is the top superconducting belt 12, the internal structure is all other structures inside 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 includes 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 includes an outer superconducting cable dewar pipe 17 and an inner superconducting cable 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 cryogenic container 100, a superconducting connection 200, a tapping device 300, and a tube assembly (not shown). The terminal cryogenic container 100 includes a frame structure 110 and a shell structure 120 connected to each other. The drainage device 300 is disposed inside the terminal cryogenic container 100, and the input end of the drainage device 300 is connected to the output end of the superconducting cable 10. The superconducting connection device 200 is provided on the frame structure 110. The sleeve assembly is mounted on the frame structure 110 and extends into the terminal cryogenic container 110 and is connected to the output of the tapping device 300. The superconducting connection device 200 is used to pierce the superconducting cable 10 so that the superconducting cable 10 extends inside the terminal cryogenic vessel 100. The terminal cryogenic container 100 has a sealed double-shell structure, and a vacuum state is formed between the double shells, so as to provide a low-temperature environment for high-voltage current conduction in the superconducting cable 10, reduce power consumption, and improve the power conversion rate of the superconducting cable. The superconducting connection device 200 is used to assist the superconducting cable 10 to extend into the terminal cryogenic container 100, ensure 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 also ensure 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 to guide the high voltage current in the superconducting cable 10 to an external power grid.
In one embodiment, the superconducting connection device 200 is connected to the superconducting cryogenic container 100 by welding.
In another embodiment, superconducting connection 200 is connected to superconducting cryogenic vessel 100 by a dewar connection.
In one embodiment, the superconducting connection 200 is connected to the superconducting dewar structure 19 in the superconducting cable 10 by welding.
To facilitate the arrangement of the superconducting connection device 200 and the bushing connection device 500 on the terminal cryogenic container 100, in one of the preferred embodiments, the frame structure 110 is a square frame and the shell structure 120 is a semi-cylindrical shell double shell structure abutting against the frame structure 110.
In order to ensure the sealing, in one embodiment, the frame structure 110 and the housing structure 120 are connected by welding.
In order to ensure the sealing property, the frame structure 110 and the housing structure 120 are connected by a dewar structure in a preferred embodiment. Specifically, the edge of the frame structure 110 connected to the shell structure 120 is a dewar structure, and the dewar structure is used for realizing a sealed and detachable connection.
In the three-phase coaxial superconducting cable terminal system, the terminal low-temperature container adopts the design of the connected frame structure and shell structure, so that the electrical connection and dewar installation of the superconducting connecting device, the drainage device and the sleeve pipe assembly in the system are facilitated, the operation is simple and convenient, and the reliability is high. Meanwhile, due to the split design of the terminal low-temperature container, the maintenance and the replacement in the use process are facilitated.
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. Specifically, superconducting connection 200 assists superconducting cable 10 to extend through the first cavity into terminal cryogen vessel 100, and bushing connection 500 assists bushing 400 to extend through the first cavity into terminal cryogen vessel 100.
The shell structure 120 includes an inner shell 121 and an outer shell 122, a second cavity (not labeled) is formed between the inner shell 121 and the outer shell 122, and the first cavity and the second cavity form a cavity between the two shells in the terminal cryogenic container 100. The first cavity and the second cavity are free of filling materials and are in a vacuum state, so that the 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 wrapping the outer portions of the inner housing 121 and the inner support frame 111.
In order to avoid the influence of the adjustment of the superconducting connection device 200 and the sleeve connection device 500 on the vacuum degree between the double shells of the whole terminal cryogenic container 100, namely, on the first cavity and the second cavity, due to the superconducting connection device 200 and the sleeve connection device 500 installed in the first cavity, in one preferred embodiment, a baffle (not shown) is arranged between the first cavity and the second cavity. The baffle is used for isolating a first cavity and a second cavity in a double-shell structure of the terminal cryogenic container 100, namely, the vacuum degree and the like in the second cavity cannot be influenced in the installation and adjustment processes of the superconducting connection device 200 and the sleeve connection device 500, and therefore the adjustment difficulty and the adjustment cost of the superconducting connection device 200 and the sleeve connection device 500 are reduced.
To prevent the presence of an insulated cold bridge or blind spot in the double-shell structure of the final cryogenic vessel 100, in one of the preferred embodiments, communication is made between the first and second cavities. The three-phase coaxial superconducting cable terminal system simplifies the equipment structure and reduces the operation difficulty only through one set of vacuum pumping 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 for distribution of the superconducting connecting device, the superconducting cable and the sleeve pipe assembly is formed between the inner supporting frame and the outer supporting frame, and the superconducting connecting device, the superconducting cable, the sleeve pipe assembly and the frame structure are electrically connected or installed in the open first cavity, so that the operation is convenient and the connection is reliable. Meanwhile, the inner shell is connected with the inner support frame, and the outer shell is connected with the outer support 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 insulation effect of the terminal low-temperature container is improved.
In one embodiment, the edges of the frame structure 110 are provided with frame extrusions 130 and the edges of the shell structure 120 are provided with shell extrusions 140. Frame out-turned portion 130 is connected to shell out-turned portion 140 to provide connection of frame structure 110 to shell structure 120.
In one embodiment, as shown in fig. 6 and 7, the frame eversion 130 comprises a first frame eversion 131 and a second frame eversion 132, and the shell eversion 140 comprises a first shell eversion 141 and a second shell eversion 142. Wherein the first frame outward-turned part 131 is provided at the edge of the inner support frame 111, the second frame outward-turned part 132 is provided at the edge of the outer support frame 112, the first shell outward-turned part 141 is provided at the edge of the inner shell 121, and the second shell outward-turned part 142 is provided at the edge of the outer shell 122. The first frame out-turned part 131 abuts the first shell out-turned part 141 and the second frame out-turned part 132 abuts the second shell out-turned part 142 to provide a connection of the frame structure to the shell structure.
In order to ensure the sealing, in one specific embodiment, the frame extrusions 130 and shell extrusions 140 are joined by welding to connect the frame structure 110 to the shell structure 120.
In order to achieve a detachable connection of frame structure 110 to housing structure 120 while ensuring a hermetic seal, in a preferred embodiment, frame evagination portion 130 and housing evagination portion 140 are connected by a dewar structure to achieve a connection of frame structure 110 to housing structure 120.
In the three-phase coaxial superconducting cable terminal system, the frame outward turning part is arranged at the edge of the frame structure, the shell outward turning part is arranged at the edge of the shell structure, the frame structure and the shell structure are conveniently connected through the frame outward turning part and the shell outward turning part, the operation difficulty is reduced, and the sealing effect is improved.
In one embodiment, as shown in fig. 5, the flow guiding device 300 includes a belt flow guiding structure 310 cooperating with the superconducting belts (the top superconducting belt 12, the middle superconducting belt 13, and the bottom superconducting belt 14) in the superconducting cable 10, or the flow guiding device 300 includes a shielding flow guiding structure 320 cooperating with the super-shielding layers (the outer shielding metal belt 11 and the inner shielding metal belt 15) in the superconducting cable.
Specifically, the belt-bundle current guiding structure 310 is used for transmitting high voltage electricity in the superconducting cable to an external power grid, and the shielding current guiding structure 320 is used for grounding an outer shielding layer and an inner shielding layer in the superconducting cable 10, so as to ensure safety in the current guiding process.
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 safety in the drainage process is ensured through the connection of the shielding drainage structure and the inner shielding metal belt and the outer shielding metal belt in the superconducting cable.
In one embodiment, as shown in fig. 11 and 12, the belt drainage structure 310 comprises a first transfer component 311, an adhesive material, a first drainage component 312 and a first drainage connection component 313. Wherein, the first splice assembly 311 is formed with a first splice cavity (not shown) for placing the belt structures in the superconducting cable 10, such as the top layer superconducting belt 12, the middle layer superconducting belt 13 and the bottom layer superconducting belt 14. The adhesive material is filled in the first transfer cavity to adhere the first transfer component 311 and the tape structure, the first drainage component 312 is electrically connected to the first transfer component 311, and the first drainage connection component 313 is disposed between the first transfer component 311 and the first drainage component 312, and is used for fixedly connecting the first transfer component 311 and the first drainage component 312.
To simplify the structure, in one embodiment, as shown in fig. 12, the first drain connection assembly 313 is a bolt.
In one embodiment, as shown in fig. 11 and 12, the first transition 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 transition cavity.
To reduce the effect of stress on the conductive properties of the superconducting electrical 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 embodiment, as shown in fig. 13 and 14, the shielding drainage structure 320 includes a second adapter assembly 321, a second drainage assembly 322, and a second drainage connection assembly 323.
Wherein a second transition module is formed with a second transition cavity (not shown) for placing the tape structures such as the outer shielding metal tape 11 and the inner shielding metal tape 15 in the superconducting cable 10. The second current guiding assembly 322 is electrically connected to the second adapter assembly 321, the second current guiding connection assembly 323 is disposed between the second adapter assembly 321 and the second current guiding assembly 322, and is configured to fixedly connect the second adapter assembly 321 and the second current guiding assembly 322, and the fastening assembly 3212 is configured to fasten the second adapter assembly 321 and a tape structure in the superconducting cable 10.
To simplify the construction, in one embodiment, as shown in FIG. 14, the second flow directing connection assembly 323 is a bolt.
In one embodiment, as shown in fig. 14, the second adapter assembly 321 includes a second inner protection ring 3211 and a fastening assembly 3212. The fastening component 3212 is a hoop or a hoop. Specifically, the fastening assembly 3212 includes a clip member 3213 and a fastening member 3214, wherein the fastening member 3214 is a bolt and a nut.
To mitigate the effects of stress on the conductive properties of the superconducting electrical cable, in one embodiment, the shielding drainage 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 adapter cavity of the first adapter component through the adhesive material, so that the first adapter component is stably connected with the superconducting cable, and the working stability of an external power grid is improved. Meanwhile, the adhesion of the adhesion 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 connection device 500. The bushing 400 is used to interface with an external power grid. The sleeve connection device 500 is used to assist the sleeve 400 to extend towards the interior of the terminal cryogenic container 100, ensure the butt joint of the double-shell structure of the terminal cryogenic container 100 and the hollow structure of the sleeve 400, and ensure the sealing performance at 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 bushing 410 is connected with the belt drainage structure 310, and the other end is connected with the power grid; the grounding sleeve 420 is connected to the shielding drainage structure 320 at one end and grounded at the other end. The bushing coupling apparatus 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 low temperature container 100 and is configured to penetrate through the high voltage bushing 410, so that the high voltage bushing 410 extends into the terminal low temperature container 100. The grounding connection assembly 520 is disposed on the terminal cryogenic container 100 and is configured to penetrate the grounding sleeve 420, so that the grounding sleeve 420 extends toward the interior of the terminal cryogenic container 100.
In one embodiment, as shown in fig. 8, superconducting connection apparatus 200 includes a superconducting dewar inner tube 210, a superconducting dewar outer tube 220, and a superconducting connection assembly 230. Wherein the superconducting Dewar inner tube 210 is butted against the superconducting cable Dewar structure 19 to form a superconducting cable sealed casing. Superconducting dewar outer tube 220 interfaces with frame structure 110 of terminal cryogen vessel 100, forming a terminal sealed enclosure with a through-hole communicating the interior and exterior of terminal cryogen vessel 100. The superconducting cable sealing shell passes through the through hole and abuts against the terminal sealing shell and extends towards the inside of the terminal cryogenic vessel 100. The superconducting connection assembly 230 is used for fixedly connecting the superconducting Dewar inner tube 210 and the superconducting Dewar outer tube 220.
In one specific embodiment, the superconducting cable sealing shell passes through the through hole to abut against the terminal sealing shell and extends towards the inside of the terminal dewar structure, that is, 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 a blind spot at the connection part of the superconducting cable dewar structure 19 and the terminal dewar structure is eliminated. The superconducting connecting assembly 230 is disposed between the superconducting dewar inner tube 210 and the superconducting dewar outer tube 220, and is used for connecting the superconducting dewar inner tube 210 and the superconducting dewar outer 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, the superconducting dewar inner pipe 210 includes the superconducting dewar inner pipe 210 and a superconducting cable dewar inner flange 213. The superconducting Dewar inner tube 210 covers the end of the superconducting cable Dewar structure 19, and the superconducting Dewar inner tube 210 and the superconducting cable Dewar structure 19 together form a superconducting cable sealing shell.
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. The outer pipe 222 of the superconducting Dewar outer pipe covers the opening of the terminal Dewar structure along the thickness direction, and the outer pipe 222 of the superconducting Dewar outer pipe and the terminal Dewar structure form a terminal sealing shell together.
The superconducting cable outer flange 223 is provided on the outer tube 222 of the superconducting dewar outer tube, and the superconducting cable inner flange 213 and the superconducting cable outer flange 223 are provided in parallel in the extending direction of the superconducting joint assembly 230. The superconducting cable Dewar outer flange 223 and the superconducting cable Dewar inner flange 213 are fixedly connected by a superconducting connection assembly 230.
In one preferred embodiment, as shown in fig. 9, the superconducting connection assembly 230 includes a nut 231 and a bolt 232.
The above-described dewar structure connecting device further comprises a sealing ring 250. Wherein, the sealing ring 250 is arranged between the superconducting Dewar inner pipe 210 and the superconducting cable Dewar inner flange 213. The Dewar structure connecting device improves the sealing property between the outer pipe of the inner pipe of the superconducting Dewar and the inner flange of the superconducting cable Dewar through the sealing part.
In one embodiment, as shown in fig. 8, the inner portion of the superconducting dewar inner tube 210 and/or the outer tube 222 of the superconducting dewar outer tube is provided with a thermal insulation layer 240. By laying a layer of insulation 240 inside the inner tube 210 of the superconducting dewar and/or the outer tube 222 of the superconducting dewar.
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 dewar inner tube 210 includes an inner tube 211 of the superconducting dewar inner tube, an outer tube 212 of the superconducting dewar inner tube, and a superconducting dewar inner tube sealing ring 214. The inner pipe 211 of the superconducting Dewar inner pipe is arranged at the end part of the inner pipe 211 of the superconducting Dewar inner pipe, the outer pipe 212 of the superconducting Dewar inner pipe is sleeved outside the inner pipe 211 of the superconducting Dewar inner pipe and is abutted against one end, back to the outer pipe 212 of the superconducting Dewar inner pipe, of the superconducting cable Dewar inner flange 213, and the superconducting Dewar inner pipe sealing ring 214 is arranged between the inner pipe 211 of the superconducting Dewar inner pipe and the outer pipe 212 of the superconducting Dewar inner pipe. 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 superconducting dewar inner tube sealing ring 214 constitute a superconducting cable sealing case. 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 sealing ring 214 constitute a superconducting cable sealing 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. The end face of the inner pipe 221 of the superconducting Dewar outer pipe is fixed on the inner wall surface of the terminal, the outer pipe 222 of the superconducting Dewar outer pipe is sleeved in the inner pipe 221 of the superconducting Dewar outer pipe, and the end face of the outer pipe 222 of the superconducting Dewar outer pipe is fixed on the outer wall surface of the terminal. Wherein the extending direction of cryogenic terminal container 100 intersects the extending direction of superconducting cable 10 or cryogenic terminal container 100 extends along the extending direction of superconducting cable 10. It is understood that the direction in which the cryogenic terminal container 100 extends refers to the direction in which the terminal outer wall surface in the cryogenic terminal container 100 points toward the terminal inner wall surface.
In one preferred embodiment, casing connection apparatus 500 includes an inner casing dewar tube (not shown), an outer casing dewar tube (not shown), and a casing connection assembly (not shown). Wherein, sleeve pipe dewar inner tube and sleeve pipe 400 butt joint form the sealed casing of sleeve pipe, and the sealed casing of terminal that the butt of sleeve pipe dewar outer tube and terminal cryogenic vessel 100 butt formed the through-hole, and the sealed casing of sleeve pipe passes through-hole and butt in terminal cryogenic vessel 100, and to terminal cryogenic vessel 100 is inside to be extended, and sleeve pipe coupling assembling is used for fixed connection sleeve pipe 400 and terminal cryogenic vessel 100.
According to the superconducting connecting device in the three-phase coaxial superconducting cable terminal system, the superconducting cable sealing shell is formed by butting the superconducting Dewar inner pipe with the superconducting cable Dewar structure, the terminal sealing shell with the through hole for communicating the inside with the outside of the terminal low-temperature container is formed by butting the superconducting Dewar outer pipe with the frame structure, the superconducting cable sealing shell is sleeved on the terminal sealing shell, the connection between the superconducting cable and the terminal low-temperature container is realized, meanwhile, the perfect lap joint between the superconducting cable Dewar structure and the terminal Dewar structure is realized, the blind spot at the connecting position of the superconducting cable and the terminal low-temperature container is eliminated, the heat preservation effect of a low-temperature cavity in the superconducting cable is improved, the consumption of low-temperature atmosphere is reduced, and the use cost is reduced.
In one embodiment, as shown in fig. 5 and 15, the three-phase coaxial superconducting cable termination system includes a connection flexible 600. Wherein, the drainage device 300 is connected with the cannula assembly by the connection flexible board 600. The flexible connection board 600 is provided with a buffer structure 630, and the buffer structure 630 is used for buffering the force between the current guiding device 300 and the sleeve assembly along the length direction of the superconducting cable 10.
To simplify the operation, in one preferred embodiment, as shown in fig. 15, the connection flexible 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 flexible plate 600 is connected with the output end of the drainage device 300, and the second connection end 620 is connected with the input end of the sleeve 400.
In order to further improve the buffering effect of the buffering structure 630, in one embodiment, the buffering 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 tiny deformation of a cable insulating material caused by the large electromagnetic force and the cold and hot circulation when the superconducting cable works at a low temperature can be overcome through the connecting flexible plate, 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 termination system further includes a casing clamp 700, wherein a casing included angle 700 is provided at the output end of the current guiding device 300 for clamping the end of the casing 400 to connect the current guiding device 300 and the casing 400. Specifically, the casing clamp 700 includes a first clamping portion 710, a second clamping portion 720, and a clamp fastening member 730. The first clamping portion 710 has a first clamping surface. 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 to connect 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 vacuum pumping device 800 is used for pumping air between the first cavity and the second cavity 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 termination system further includes a liquid nitrogen tank connection device 900. The liquid nitrogen container connecting device 900 includes a liquid nitrogen container fixing seat 910 and a liquid nitrogen container fixing nail 920. The gas transmission port of the liquid nitrogen tank is fixed inside the terminal cryogenic container 100 by the liquid nitrogen tank connecting device 900, so that the air in the terminal cryogenic container 100 is conveniently discharged and filled with liquid nitrogen.
To facilitate 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 frame assembly 1000 includes a supporting frame 1010, a pulley 1020 and a supporting rod 1030. The support rod 1030 passes through a support hole (not shown) of the support frame 1010, two pulleys 1020 are respectively arranged at two ends of the support rod 1030, and the support frame 1010 abuts against the lower surface of the terminal low-temperature container 100.
According to the three-phase coaxial superconducting cable terminal system, the sleeve clamp is convenient to clamp the sleeve assembly, and the drainage device is stably and detachably connected with the sleeve assembly.
In one embodiment, a method of assembling a terminal system of coaxial superconducting cables includes the steps of:
step 1: the frame structure 110 is assembled.
Step 2: the superconducting dewar outer tube 220 in the superconducting connection device 200 is mounted to the frame structure 110.
And step 3: the superconducting dewar inner pipe 210 in the superconducting connection device 200 is installed to the terminal end of the superconducting cable 10, and the superconducting dewar inner pipe 210 is fitted inside the superconducting dewar outer pipe 220.
And 4, step 4: the ferrule assembly is mounted to the frame structure 110.
And 5: a current guiding device 300 is attached to the superconducting cable 10 in the terminal cryogenic vessel 100.
Step 6: connecting the output of the drainage device 300 with the input of the cannula assembly.
And 7: connecting the housing structure 120 with the frame structure 110.
In one preferred embodiment, the cannula assembly includes a cannula 400 and a cannula connector apparatus 500. Wherein, the step 4: mounting the set of bushings to the frame structure 110, in particular comprising the steps of:
step 41: the outer pipe of the pipe-in-pipe dewar in the pipe-in-pipe connection apparatus 500 is mounted to the frame structure 110.
Step 42: the inner pipe of the casing dewar in the casing connection device is fitted over the casing 400.
Step 43: the sleeve dewar inner tube is nested within the sleeve dewar outer tube to complete the installation of the sleeve assembly on the frame structure 110.
According to the assembling method of the three-phase coaxial superconducting cable terminal system, the sleeve Dewar outer pipe in the superconducting connecting device is firstly installed on the frame structure, then the superconducting cable, the sleeve and the terminal low-temperature container are installed and electrically connected 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 has the advantages that the system is assembled in a reasonable operation space, and the operation difficulty is low.
In one embodiment, step 1 is followed by mounting the wheel carriage assembly 1000 and the vacuum nozzle assembly on the frame structure 110.
In one embodiment, the assembling method of the three-phase coaxial superconducting cable termination 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 carrier assembly 1000, the vacuum pumping device 800 and other parts are fixedly connected through welding.
Step 2: the sleeve 400 and the sealing ring are arranged on the inner pipe of the sleeve Dewar by a bolt and nut sleeve;
and step 3: the outer pipe of the sleeve Dewar is fixedly connected with the inner pipe of the sleeve Dewar through a bolt and nut sleeve and a sealing ring.
And 4, step 4: the liquid nitrogen tank connection means 900 is welded to the inside vertical surface of the terminal cryogenic container 100.
And 5: welding an inner pipe 211 of the superconducting Dewar inner pipe 210 with the superconducting cable superconducting Dewar structure 10; winding a heat insulating layer 240 outside the inner tube 211 of the superconducting dewar inner tube 210; welding and connecting the superconducting cable Dewar inner flange 213 with the superconducting cable outer Dewar pipe 17 in the superconducting cable Dewar structure 19; then the superconducting cable Dewar inner flange 213 is welded with the outer pipe 212 of the superconducting Dewar inner pipe 210; the outer tube 212 of the superconducting Dewar inner tube 210 and the inner tube 211 of the superconducting Dewar inner tube 210 are welded closed by a superconducting Dewar inner tube sealing ring 214.
Step 6: sleeving a second inner protection ring 3211 into the superconducting cable 10, inserting the outer shielding metal belt 11 into the second switching cavity, and sleeving the fastening assembly 323 on the outer shielding metal belt 11 for fastening; the second flow guiding element 322 is fixed to the second adapter element 321 by bolts, and the second stress relief element 324 is screwed to abut against the second flow guiding element 322.
And 7: sleeving the first inner protection ring 3111 into the superconducting cable 10, inserting tape structures such as a top layer superconducting tape 12, a middle layer superconducting tape 13 or a bottom layer superconducting tape 14 into the first transfer cavity, and injecting a bonding material into the first transfer cavity to fasten the connecting tape structure and the first transfer component 311; the first flow guiding assembly 312 is fixed to the first adapter assembly 311 by bolts, and the first stress relief assembly 314 is screwed to abut against the first flow guiding assembly 312. And connecting the top superconducting belt 12, the middle superconducting belt 13 and the bottom superconducting belt 14 with the corresponding belt drainage structures 310 in sequence.
And 8: sleeving a second inner protection ring 3211 into the superconducting cable 10, inserting the inner shielding metal belt 15 into the second switching cavity, and sleeving the fastening assembly 323 on the inner shielding metal belt 15 for fastening; the second flow guiding element 322 is fixed to the second adapter element 321 by bolts, and the second stress relief element 324 is screwed to abut against the second flow guiding element 322.
And step 9: the seal ring is fitted over the flange of the superconducting cable 10, and the superconducting cable 10 and the terminal cryogenic container 100 are fixed by adjusting the relative positions of the superconducting cable dewar inner flange 213 of the superconducting cable 10 and the superconducting cable dewar outer flange 223 of the terminal cryogenic container 100.
Step 10: the pin 920 is screwed to the tube 16 of the superconducting cable 10, and the pin 920 is fitted to the pin holder 910 of the tube 2.
Step 11: the inner superconducting Dewar pipe 210 and the outer superconducting Dewar pipe 220 are fastened by a nut and bolt kit, and the fastening state of the liquid nitrogen pipe fixing nail 910 is adjusted.
Step 12: the sleeve clamp 700 and the connection flexible plate 600 are connected to the corresponding sleeve 400 and the corresponding drainage device 300 through bolts and nuts.
Step 13: the inner support frame 111 is connected with the inner housing 121, and a heat insulating layer is wrapped outside the support frame and the inner housing.
Step 14: the outer support frame 112 and the outer shell 122 are connected to complete the assembly of the three-phase coaxial superconducting cable termination system.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to 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;
a superconducting connection device provided on the frame structure for penetrating a superconducting cable so that the superconducting cable extends toward the inside of the terminal cryogenic container;
the drainage device is arranged inside 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 pipe assembly is arranged on the frame structure, extends towards the interior of the terminal low-temperature container and is connected with the output end of the drainage device.
2. The system of claim 1, wherein the frame structure includes an inner support frame and an outer support frame forming 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 system of claim 1, wherein the frame structure has a frame evagination at an edge thereof, and the shell structure has a shell evagination at an edge thereof; the frame evagination part is connected with the shell evagination part.
4. The system of claim 1, wherein the current-directing apparatus includes a belt-directing structure that cooperates with a superconducting belt in the superconducting cable, or the current-directing apparatus includes a shielding-directing structure that cooperates with a super-shield layer in the superconducting cable.
5. The three-phase coaxial superconducting cable termination system of claim 4, wherein the belt drainage structure comprises:
a first transition assembly formed with a first transition cavity; the first transition cavity is used for placing a belt structure in the superconducting cable;
the pasting material is filled in the first transfer cavity and used for pasting the first transfer assembly and the belt structure;
the first drainage assembly is electrically connected with the first switching assembly;
first drainage coupling assembling, first drainage coupling assembling locates first switching subassembly with between the first drainage subassembly, be used for fixed connection first switching subassembly with first drainage subassembly.
6. The three-phase coaxial superconducting cable termination system of claim 4, wherein the bushing assembly includes a bushing-to-bushing connection, the bushing including a high voltage bushing and a ground bushing; one end of the high-voltage bushing is connected with the belt drainage structure, and the other end of the high-voltage bushing 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 assembly and a grounding connecting assembly; the high-voltage connecting assembly is arranged on the terminal low-temperature container and is used for penetrating the high-voltage bushing so as to enable the high-voltage bushing to extend towards the interior of 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 towards the interior of the terminal low-temperature container.
7. The three-phase coaxial superconducting cable termination system of claim 1, wherein the superconducting connection device comprises:
the superconducting Dewar inner pipe is butted with the superconducting cable Dewar structure to form a superconducting cable sealing shell;
the superconducting Dewar outer pipe is butted with the frame structure to form a terminal sealing shell with a through hole for communicating the inside and the outside of the terminal low-temperature container; the superconducting cable sealing shell penetrates through the through hole and abuts against the terminal low-temperature container, and extends towards the interior of the terminal low-temperature container;
and the superconducting connecting assembly is used for fixedly connecting the superconducting Dewar inner pipe and the superconducting Dewar outer pipe.
8. The three-phase coaxial superconducting cable termination system of claim 1, further comprising:
the connection flexible plate, the drainage device with the thimble assembly passes through the connection flexible plate links to each other, be equipped with buffer structure in the connection flexible plate, buffer structure is used for the buffering the drainage device with follow between the thimble assembly superconducting cable length direction's effort.
9. The system of claim 1, further comprising a casing clamp disposed at an output end of the current-guiding apparatus, the casing clamp including:
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 jointly form a clamping cavity for clamping the sleeve assembly;
and the clamp fastening component is connected with the first clamping part and the second clamping part respectively.
10. A method of assembling a three-phase coaxial superconducting cable termination system, comprising:
assembling the frame structure;
mounting a superconducting Dewar outer tube in a superconducting connection device onto a frame structure;
installing a superconducting Dewar inner pipe in a superconducting connecting device to a terminal of a superconducting cable, and sleeving the superconducting Dewar inner pipe in a superconducting Dewar outer pipe;
mounting a bushing assembly to the frame structure;
installing a current guiding device on the superconducting cable in the terminal cryogenic container;
connecting the output end of the drainage device with the input end of the sleeve assembly;
connecting the housing structure with the frame structure.
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| CN202111366041.9A CN114284764B (en) | 2020-07-31 | 2020-07-31 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN202010756684.3A CN112072606B (en) | 2020-07-31 | 2020-07-31 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN202111366042.3A CN114156829B (en) | 2020-07-31 | 2020-07-31 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
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| CN114300297A (en) * | 2021-12-30 | 2022-04-08 | 深圳供电局有限公司 | Superconductive isolating switch |
| CN114300296A (en) * | 2021-12-30 | 2022-04-08 | 深圳供电局有限公司 | Superconductive isolator and corresponding isolator operating device |
| CN114843984A (en) * | 2022-05-06 | 2022-08-02 | 中国科学院合肥物质科学研究院 | High-voltage sealed multi-core wire harness device used in low-temperature vacuum environment |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114284764A (en) | 2022-04-05 |
| CN112072606B (en) | 2021-12-07 |
| CN114156829A (en) | 2022-03-08 |
| CN114284764B (en) | 2023-07-07 |
| CN114156829B (en) | 2023-08-11 |
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