CN114336102B - Superconducting cable joint and device - Google Patents
Superconducting cable joint and device Download PDFInfo
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- CN114336102B CN114336102B CN202111371764.8A CN202111371764A CN114336102B CN 114336102 B CN114336102 B CN 114336102B CN 202111371764 A CN202111371764 A CN 202111371764A CN 114336102 B CN114336102 B CN 114336102B
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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
Abstract
The invention relates to a superconducting cable joint and a superconducting cable device, and relates to the technical field of superconducting cables. The superconducting cable joint includes a tube connection assembly and a cable connection assembly. The pipe connecting component is used for being connected between any adjacent Dewar pipes and is provided with a cable cavity for accommodating cables, and the cable connecting component is used for being connected between any adjacent cables and is accommodated in the cable cavity. By means of the arrangement, a complete sealing channel can be formed around the cable, so that the filled liquid nitrogen can normally circulate at the joint and cannot leak at the joint, and the power transmission capacity of the cable is improved. Meanwhile, the pipe connecting assembly can form a first heat insulation cavity and a second heat insulation cavity which are wrapped on the outer periphery of the cable cavity, so that the continuity and the tightness of connection of the heat insulation layer outside the liquid nitrogen at the joint are guaranteed, and therefore the liquid nitrogen filled around the cable can not be quickly subjected to heat exchange with the external environment at the joint, and the superconducting transmission capacity of the cable at the joint is guaranteed.
Description
Technical Field
The invention relates to the technical field of superconducting cables, in particular to a superconducting cable joint and a device.
Background
With the rapid development of large cities, higher requirements are put on the power supply capacity of power transmission equipment, and conventional copper conductors are difficult to meet the requirements, so that a superconducting cable is needed to solve the problem of large current transmission of a power transmission line. After the superconducting cable is connected to the existing power grid, the cable needs to be placed in a working environment filled with liquid nitrogen to improve the superconducting performance of the cable, and when the length of a line reaches a certain degree, a single large-length superconducting cable cannot meet the production, transportation and construction requirements, so that a plurality of short superconducting cables are needed to be connected. The current intermediate connector commonly used for cable connection can only connect the power channel of the cable, but can not guarantee the superconducting performance of the cable at the connector.
Disclosure of Invention
Based on this, it is necessary to provide a superconducting cable joint against the problem that the existing cable connection joint cannot ensure the superconducting performance of the cable at the joint.
A superconducting cable joint includes a tube connection assembly and a cable connection assembly. The pipe connecting assembly is used for being connected between any two adjacent Dewar pipes; the pipe connecting assembly is provided with a cable cavity for accommodating a cable, a first heat insulation cavity and a second heat insulation cavity, wherein the first heat insulation cavity and the second heat insulation cavity are wrapped on the outer peripheral side of the cable cavity, the first heat insulation cavity is wrapped on the outer peripheral side of the second heat insulation cavity, and the second heat insulation cavity is communicated with a sealing space in the Dewar pipe on the same side; the cable connecting assembly is used for being connected between any adjacent cables, and the cable connecting assembly is accommodated in the cable cavity.
In one embodiment, the pipe connection assembly includes a first sleeve, a second sleeve, and a first sandwich pipe; the second sleeve is sleeved outside the first sleeve, the first interlayer pipe is provided with a first interlayer cavity, and two side walls of the first interlayer cavity are respectively connected with the ends of the first sleeve and the second sleeve so as to jointly enclose the first heat insulation cavity.
In one embodiment, the pipe connection assembly further comprises a second cladding pipe; the second interlayer pipe is connected to the inner side of the first interlayer pipe, and a cylinder cavity of the second sleeve and a pipe cavity of the second interlayer pipe are enclosed together to form the cable cavity; the second interlayer pipe is provided with a second interlayer cavity, two side walls of the second interlayer cavity are used for being connected with the inner layer and the outer layer of the Dewar pipe respectively, and the second interlayer cavity forms the second heat insulation cavity.
In one embodiment, the cable connection assembly includes a connecting rod, a first conductive barrel, and a second conductive barrel; the first conduction cylinder and the second conduction cylinder are respectively connected to two ends of the connecting rod; the first conductive cylinder is sleeved on one of any two adjacent cables, the second conductive cylinder is sleeved on the other cable, and the first conductive cylinder and the second conductive cylinder are connected with the conductive layers of the cables on the same side.
In one embodiment, the first conductive barrel and the second conductive barrel each comprise a first collar, a second collar, and a third collar; the second lantern ring is connected to one end of the first lantern ring, and one end of the first lantern ring, which is connected with the second lantern ring, is inserted between the conducting layer and the insulating layer of the cable; the third lantern ring is sleeved on the outer side of the first lantern ring and is used for pressing the conductive layer.
In one embodiment, the first collar and/or the third collar are configured with injection holes for injecting a curing agent between the first collar and the third collar.
In one embodiment, the first conductive cylinder and the second conductive cylinder each include a clip, the clips are sleeved on the outer sides of the first collar and/or the third collar of the same group, and the clips are used for being connected with the connecting rod.
In one embodiment, the number of cable connection assemblies is multiple; each cable is provided with a plurality of conductive layers which are sleeved in sequence from inside to outside along the radial direction, each conductive layer is provided with a connecting section, and the connecting sections are exposed at intervals along the axial direction of the cable; two connecting sections which are arranged on the two cables along the exposure direction and correspond to each other in the radial direction are arranged as a group, each group of connecting sections corresponds to one group of cable connecting assemblies, and connecting rods in the plurality of groups of cable connecting assemblies are arranged at intervals around the axis of the cable.
In one embodiment, the superconducting cable joint further comprises at least two support frames, and at least two support frames are arranged at intervals along the axial direction of the pipe connection assembly and are connected to the pipe connection assembly.
The invention also provides a superconducting cable device which can solve at least one technical problem.
The superconducting cable device comprises the superconducting cable joint and a plurality of superconducting cable bodies, wherein one superconducting cable joint is connected between any two adjacent superconducting cable bodies.
The invention has the beneficial effects that:
a superconducting cable joint includes a tube connection assembly and a cable connection assembly. The pipe connecting component is used for being connected between any adjacent Dewar pipes and is provided with a cable cavity for accommodating cables, and the cable connecting component is used for being connected between any adjacent cables and is accommodated in the cable cavity. Through such setting, the cable chamber that the union coupling assembly formed can be with the inner chamber intercommunication that is used for holding the cable in the Dewar pipe and form complete sealed passageway to guarantee that the liquid nitrogen that fills can circulate normally in this junction and can not take place to leak in this place, after the cable coupling assembly carries out electric connection with two cables in the cable chamber, adjacent two cables can form the electric passageway of intercommunication in order to carry out power transmission, and can improve its power transmission's ability under the parcel of the liquid nitrogen that fills. Simultaneously through foretell setting, the second in the tube coupling assembling insulates against heat the chamber and the interior sealed space intercommunication of dewar pipe of homonymy, and first thermal-insulated chamber parcel in the periphery side in second thermal-insulated chamber to guaranteed continuity and the leakproofness that is connected in this joint department liquid nitrogen outside insulating layer, make the liquid nitrogen that fills around the cable can not carry out the heat exchange at this joint department fast with external environment, in order to guarantee that this joint department can not cause the influence to the superconductive transmission capacity of cable.
Drawings
FIG. 1 is a schematic view of a superconducting cable joint according to an embodiment of the present invention;
fig. 2 is an overall cross-sectional view of a superconducting cable joint provided by an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic view of a first sleeve in a superconducting cable joint according to an embodiment of the present invention;
fig. 5 is a schematic view of a second sleeve in a superconducting cable joint according to an embodiment of the present invention;
fig. 6 is a schematic view of a first interlayer pipe in a superconducting cable joint according to an embodiment of the present invention;
fig. 7 is a cross-sectional view of a second interlayer tube in a superconducting cable joint according to an embodiment of the present invention;
fig. 8 is an exploded view of a cable connection assembly in a superconducting cable joint according to an embodiment of the present invention;
fig. 9 is a schematic view of a conductive cylinder in a superconducting cable joint according to an embodiment of the present invention;
fig. 10 is a schematic view of a conductive cylinder in a superconducting cable joint according to an embodiment of the present invention;
fig. 11 is a schematic connection diagram of a cable connection assembly in a superconducting cable joint according to an embodiment of the present invention;
fig. 12 is a schematic view of a support frame in a superconducting cable joint according to an embodiment of the present invention.
Reference numerals: 11-an outer dewar tube; 12-inner dewar tube; 21-a first sleeve; 211-exhaust valve; 212-a first connection ring; 22-a second sleeve; 221-a second connecting ring; 23-a first interlayer pipe; 231-an outer tube; 232-an inner tube; 233-an inner connecting piece; 234-an outer connecting piece; 24-a second interlayer pipe; 241-outer sealing tube; 242-inner seal tube; 243-connecting segments; 244-an outer connection section; 25-a first connecting piece; 26-a second connecting piece; 30-a tube connection assembly; 40-a cable connection assembly; 401-a first collar; 4011-an injection hole; 4012-an injection slot; 402-a second collar; 403-third collar; 41-connecting rods; 42-a first conductive cylinder; 43-a second conductive cylinder; 44-clamping hoop; 45-insulating sleeves; 46-an insulating cover; 47-nut flakes; 48-screws; 50-cable cavity; 80-supporting frames; 81-supporting seats; 82-roller frame; 83-rollers; 100-cables; 101-conductive layer.
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.
Referring to fig. 1 and 2, fig. 1 shows an overall schematic view of a superconducting cable joint in an embodiment of the present invention, and fig. 2 shows an overall cross-sectional view of a superconducting cable joint in an embodiment of the present invention. An embodiment of the present invention also provides a superconducting cable device including a superconducting cable joint and a plurality of superconducting cable bodies. When in use, a superconducting cable joint is connected between any two adjacent superconducting cable bodies. Wherein, two adjacent cable bodies are inserted from two ends of the superconducting cable joint, and are electrically connected in the pipe connecting component 30 of the superconducting cable joint through the cable connecting component 40, so as to form a complete electric transmission channel between the two adjacent cable bodies; meanwhile, the pipe connecting assembly 30 can be communicated with the dewar pipes where two adjacent cable bodies are located, so that a channel for liquid nitrogen to circulate and a continuous heat insulation layer are formed at the joint, and the superconducting capacity of the two adjacent cables is guaranteed. The superconducting cable joint will be specifically described below.
Please refer to fig. 1 and 2. In some embodiments, the superconducting electrical cable joint includes a tube connection assembly 30 and a cable connection assembly 40. Wherein the tube connection assembly 30 is adapted to connect between any adjacent dewar tubes; the tube connection assembly 30 is constructed with a cable chamber 50 for accommodating the cable 100, and first and second heat insulation chambers wrapped at the outer circumferential side of the cable chamber 50, and the first heat insulation chamber is wrapped at the outer circumferential side of the second heat insulation chamber, which is communicated with the sealed space in the dewar tube at the same side. Meanwhile, the cable connection assembly 40 is used for being connected between any adjacent cables 100, and the cable connection assembly 40 is accommodated in the cable cavity 50.
Specifically, the two ends of the tube connecting assembly 30 along the axial direction thereof are respectively connected between two adjacent dewar tubes, and the cable cavity 50 of the tube connecting assembly 30 can communicate the inner dewar tube 12 in the two adjacent dewar tubes and connect the heat insulation layers in the two adjacent dewar tubes through the first heat insulation cavity and the second heat insulation cavity. The cables 100 located in the two adjacent dewar tubes are inserted into the cable chambers 50 of the tube connecting assembly 30 from both ends of the tube connecting assembly 30 in the axial direction thereof, respectively, and electrically connected through the cable connecting assembly 40 in the cable chambers 50. By such arrangement, two adjacent cables 100 can be electrically connected at the superconducting cable joint to achieve the purpose of transmitting power by the cables 100; meanwhile, the cable cavity 50 provides necessary space for electrical connection of the cable 100, and simultaneously ensures that liquid nitrogen in two adjacent dewar tubes can circulate at the superconducting cable joint, so that the cable 100 can be in a working environment wrapped by liquid nitrogen at the superconducting cable joint, and the superconducting transmission capability of the cable 100 is ensured. In addition, the first insulating chamber wrapped around the outer peripheral side of the cable chamber 50 provides a thermal insulation layer for liquid nitrogen at the superconducting cable joint; the second heat insulation cavity is communicated with the sealing space in the dewar pipe at the same side, so that the relative tightness of the heat insulation layer in the dewar pipe is ensured. Through the setting of first thermal-insulated chamber of first thermal-insulated chamber of second and thermal-insulated chamber parcel in the thermal-insulated chamber periphery side of second for the insulating layer of tube coupling assembling 30 can realize complete sealing connection with the insulating layer in the dewar pipe in this superconducting cable joint department, avoided the leakage of liquid nitrogen in this superconducting cable joint department and carry out the heat exchange with external environment, guaranteed the reliability that carries out thermal-insulated to liquid nitrogen in this superconducting cable joint department.
Referring to fig. 3, 4, 5 and 6, fig. 3 is a partial enlarged view of fig. 2 at a, and fig. 4 shows a schematic view of a first sleeve according to an embodiment of the invention; fig. 5 shows a schematic view of a second sleeve according to an embodiment of the invention, and fig. 6 shows a schematic view of a first interlayer pipe according to an embodiment of the invention. In some embodiments, the pipe connection assembly 30 includes a first sleeve 21, a second sleeve 22, and a first sandwich pipe 23; the second sleeve 22 is sleeved outside the first sleeve 21, the first interlayer pipe 23 is provided with a first interlayer cavity, and two side walls of the first interlayer cavity are respectively connected with the ends of the first sleeve 21 and the second sleeve 22 so as to jointly enclose a first heat insulation cavity.
Specifically, the first sleeve 21 and the second sleeve 22 are hollow cylindrical, the first sleeve 21 is coaxially sleeved on the outer side of the second sleeve 22, the first connecting rings 212 are installed at two ends of the first sleeve 21, and the second connecting rings 221 are connected at two ends of the second sleeve 22. The first interlayer pipe 23 includes an outer pipe 231 and an inner pipe 232 coaxially disposed, the outer pipe 231 being sleeved outside the inner pipe 232, and one ends of the two being aligned and connected in a sealed manner, thereby forming a first interlayer cavity between the outer pipe 231 and the inner pipe 232. Wherein, the outer tube 231 and the inner tube 232 are respectively connected with an outer connecting piece 234 and an inner connecting piece 233 at the ends facing away from the sealing connection end. In the mounting process, the outer connecting piece 234 and the first connecting ring 212 are connected through the first connecting piece 25, the inner connecting piece 233 and the second connecting ring 221 are connected through the second connecting piece 26, and sealing rings are arranged at the pressing surfaces of the outer connecting piece 234 and the first connecting piece 25, the first connecting ring 212 and the first connecting piece 25, the inner connecting piece 233 and the second connecting piece 26 and the second connecting ring 221 and the second connecting piece 26 in a pressure equalizing manner. By such arrangement, the space region between the first sleeve 21 and the second sleeve 22 forms a first heat insulation cavity together with the first interlayer cavity, so that a heat insulation layer is also arranged at the superconducting cable joint to insulate the liquid nitrogen flowing through the superconducting cable joint; by arranging the sealing rings, the sealing performance of the joint of the first sleeve 21, the second sleeve 22 and the first interlayer pipe 23 is improved, and the reliability of heat insulation of the first heat insulation cavity is ensured; meanwhile, through the arrangement of the first connecting sheet 25 and the second connecting sheet 26, the first interlayer pipe 23 with smaller diameter can be connected with the first sleeve 21 and the second sleeve 22 with larger diameter in a transitional manner, and the attractive appearance outside the cavity and the connectivity in the cavity of the first heat insulation cavity can be guaranteed while the production and the processing are convenient.
It should be noted that, the first sleeve 21 and the second sleeve 22 are provided with the first interlayer pipe 23 at both ends, and the first sleeve 21, the second sleeve 22 and the two first interlayer pipes 23 are enclosed together at the superconducting cable joint to form an independent and sealed insulating layer relative to the dewar pipe. By such arrangement, the heat insulating layer can be conveniently set in a vacuum state later, so that the uniqueness of the superconducting cable joint can be improved.
In some embodiments, an exhaust valve 211 is further installed on the sidewall of the first sleeve 21, and after the first sleeve 21, the second sleeve 22 and the two first interlayer pipes 23 form a sealed and independent insulating layer, air in the insulating layer can be pumped out through the exhaust valve 211 to be in a vacuum state so as to improve the heat insulating capability.
Referring to fig. 2, 3 and 7, fig. 7 shows a cross-sectional view of a second interlayer pipe according to an embodiment of the invention. In some embodiments, the pipe connection assembly 30 further includes a second cladding pipe 24; the second interlayer pipe 24 is connected to the inner side of the first interlayer pipe 23, and the tube cavity of the second sleeve 22 and the tube cavity of the second interlayer pipe 24 are enclosed together to form a cable cavity 50; the second interlayer pipe 24 has a second interlayer cavity, two side walls of the second interlayer cavity are used for being respectively connected with the inner layer and the outer layer of the dewar pipe, and the second interlayer cavity forms a second heat insulation cavity.
Specifically, the second interlayer pipe 24 includes an outer sealing pipe 241 and an inner sealing pipe 242 coaxially disposed, the outer sealing pipe 241 is sleeved on the outer side of the inner sealing pipe 242, and one ends of the outer sealing pipe 241 and the inner sealing pipe 242 are aligned and connected in a sealing manner, so that a second interlayer cavity is formed between the outer sealing pipe 241 and the inner sealing pipe 242. Wherein, the outer sealing tube 241 and the inner sealing tube 242 are respectively connected with an outer connecting section 244 and an inner connecting section 243 at the ends thereof facing away from the sealing connection, and a connecting flange is arranged at the end of the outer connecting section 244 facing away from the outer sealing tube 241. In the installation, two second sandwich pipes 24 are respectively installed at opposite ends of two adjacent dewar pipes and are respectively connected with two first sandwich pipes 23. Wherein, one end of the inner connecting section 243, which is away from the inner sealing tube 242, is fixedly connected with the inner dewar tube 12, and one end of the outer connecting section 244, which is provided with a flange, is fixedly connected with the outer dewar tube 11, thereby forming a sealed second heat insulation cavity; the end of the second interlayer pipe 24, which is away from the dewar pipe, is inserted from the end of the first interlayer pipe 23, which is away from the first sleeve 21, and is abutted against the end surface of the inner connecting piece 233, which is away from the first sleeve 21, and the flange on the outer connecting section 244 is fixedly connected with the end of the first interlayer pipe 23, which is away from the first sleeve 21, through bolts. Meanwhile, the outer side wall of the outer sealing tube 241 far from the inner sealing tube 242 is pressed together with the inner side wall of the inner tube 232 far from the outer tube 231, and sealing rings are pressed on the pressing surfaces between the outer sealing tube 241 and the inner tube 232 and between the second interlayer tube 24 and the inner connecting piece 233. By such arrangement, the barrel cavity of the second sleeve 22 and the inner side of the inner seal tube 242 together enclose a cable cavity 50 for housing the cable 100 and liquid nitrogen; the second interlayer pipe 24 abuts against the inner connecting piece 233 and presses a sealing ring on the pressing surface, so that the tightness of the cable cavity 50 is improved, and leakage of liquid nitrogen flowing through the cable cavity 50 is prevented. Meanwhile, the outer sealing tube 241 and the inner layer tube 232 are pressed together, so that the first heat insulation cavity and the second heat insulation cavity can have an overlapped part, the continuity of the heat insulation layer connection at the joint of the superconducting cable is ensured, and an effective heat insulation effect can be achieved; and the sealing ring is pressed on the pressing surface, so that leakage of liquid nitrogen from the sealing ring is further prevented.
It should be added that in a specific embodiment, the flange on the outer connecting section 244 is preferably bolted to the first interlayer pipe 23 at a position where a certain gap is left between the flange and the first interlayer pipe after the flange is screwed. By this arrangement, it is ensured that the second cladding tube 24 has been tightly abutted against the inner connecting piece 233, thereby further ensuring that no leakage of liquid nitrogen in the cable chamber 50 occurs.
In some embodiments, the number of second cladding tubes 24 is one, and two ends of the second cladding tube 24 are respectively connected between two adjacent dewar tubes and extend through the lumen of the second sleeve 22 and the lumens of the two second cladding tubes 24.
Referring to fig. 2 and 8, fig. 8 is an exploded view of a cable connection assembly according to an embodiment of the invention. In some embodiments, the cable connection assembly 40 includes a connecting rod 41, a first conductive barrel 42, and a second conductive barrel 43; the first conductive cylinder 42 and the second conductive cylinder 43 are respectively connected to both ends of the connection rod 41; the first conductive tube 42 is sleeved on one of any two adjacent cables 100, the second conductive tube 43 is sleeved on the other, and the first conductive tube 42 and the second conductive tube 43 are connected with the conductive layer 101 of the cable 100 on the same side.
Specifically, after connecting the backbones of the inner layers of two adjacent cables 100, the first conductive cylinder 42 and the second conductive cylinder 43 are respectively sleeved on the conductive layers 101 of the two cables 100, and are respectively fixed relative to the cables 100, so that the cables 100 cannot be displaced relative to each other. The two ends of the connecting rod 41 are fixedly connected with the first conductive cylinder 42 and the second conductive cylinder 43, respectively. By such an arrangement, the same conductive layer 101 of two adjacent cables 100 can be connected to enable power transmission; and simultaneously, the axial fixing connection function can be realized on two adjacent cables 100, so that the two connected cables 100 are prevented from being disconnected due to overlarge axial pulling force.
Referring to fig. 9 and 10, fig. 9 is a schematic diagram of a conductive cylinder according to an embodiment of the present invention, and fig. 10 is a schematic diagram of a conductive cylinder according to an embodiment of the present invention. In some embodiments, the first conductive barrel 42 and the second conductive barrel 43 each include a first collar 401, a second collar 402, and a third collar 403; the second collar 402 is connected to one end of the first collar 401, and one end of the first collar 401 to which the second collar 402 is connected is inserted between the conductive layer 101 and the insulating layer of the cable 100; the third collar 403 is sleeved outside the first collar 401 and is used for pressing the conductive layer 101.
Specifically, the first collar 401, the second collar 402, and the third collar 403 are hollow. Wherein, the first collar 401 is configured with a large end and a small end along the axial direction thereof, a plurality of annular injection grooves 4012 are configured on the outer side wall of the small end at intervals along the axial direction thereof, and the plurality of annular injection grooves 4012 are communicated through linear grooves along the axial direction of the first collar 401; one end of the big end towards the small end is provided with an annular convex ring. One end of the second collar 402 is fixedly connected with the small end of the first collar 401, and the other end is convexly provided with a baffle ring along the circumferential direction. The third collar 403 is provided with a plurality of compression rings on its inner wall at intervals in the axial direction of itself. When in installation, the third lantern ring 403 is sleeved on the cable 100, and one end of the first lantern ring 401 connected with the second lantern ring 402 is inserted between the conductive layer 101 and the insulating layer of the cable 100, so that the conductive layer 101 is tightly wrapped on the small end of the first lantern ring 401 and the outer side wall of the second lantern ring 402; after the third collar 403 is sleeved into the small end of the first collar 401 along the end of the large end of the first collar 401, the inner side wall of the end of the third collar 403 facing the large end of the first collar 401 can be tightly attached to the outer side wall of the convex ring, and the compression ring of the third collar 403 can tightly compress the conductive layer 101 on the outer side wall of the small end. By such an arrangement, the conductive layers 101 of the cables 100 can be led out to the outer surface of the cables 100 so as to connect the conductive layers 101 of two adjacent cables 100 by the connection rod 41. Meanwhile, an axial seal is formed by the end face of the baffle ring facing the large end in the second collar 402 and the space area between the first collar 401 and the third collar 403 facing the large end and the end face of the convex ring facing the small end of the first collar 401, so as to prevent the curing agent from flowing out along the axial direction of the first collar 401 after the curing agent is injected into the space area between the first collar 401 and the third collar 403.
In other embodiments, the second collar 402 may be welded to the end surface of the small end of the first collar 401 by an end surface facing away from one end of the retainer ring, or by fitting the inner sidewall of the second collar 402 over the outer sidewall of the small end of the first collar 401.
Please continue to refer to fig. 9. In some embodiments, the first collar 401 and the third collar 403 are each configured with an injection hole 4011, the injection holes 4011 being used to inject a curing agent between the first collar 401 and the third collar 403. Specifically, the injection holes 4011 are formed in the outer side wall of the large end of the first collar 401 and the outer side wall of the third collar 403, wherein the injection holes 4011 in the first collar 401 are in communication with the straight line grooves and the injection grooves 4012 in the small end, and the injection holes 4011 in the third collar 403 are in communication with the inner side walls thereof. By such arrangement, after the first collar 401, the second collar 402 and the third collar 403 compress the conductive layer 101, the curing agent can flow in from the injection hole 4011 and fill the whole space area between the first collar 401 and the third collar 403, and after the curing agent is solidified, the connection between the conductive layer 101 and the first collar 401, the second collar 402 and the third collar 403 is firmer.
In other embodiments, the outer sidewall of the large end of the first collar 401 is configured with injection holes 4011 in communication with the straight line slots on the small end and injection slots 4012; or the outer side wall of the third collar 403 is configured with an injection hole 4011 in communication with the inner side wall thereof. The curing agent may fill the entire spatial area between the first collar 401 and the third collar 403 through the injection holes 4011 on the first collar 401 or the third collar 403. In a specific embodiment, the curing agent is a liquid solder, which is liquid after heating and solid at room temperature.
Please refer to fig. 8. In some embodiments, the first conductive barrel 42 and the second conductive barrel 43 each include a clip 44, the clip 44 being disposed outside of the same set of first collars 401, the clip 44 being configured to connect with the connecting rod 41. Specifically, the clip 44 is formed by buckling two half rings with connecting lugs, and after the two half rings are buckled on the outer side of the first collar 401, the connecting lugs of the two half rings can be pressed together and fixed by the nut piece 47 and the screw 48, so that the clip 44 can be tightly sleeved on the outer side of the first collar 401. Meanwhile, both ends of the connecting rod 41 are fixedly connected with the clamps 44 on the first and second conductive cylinders 42 and 43 through nut pieces 47 and screws 48 for fixedly connecting the two half rings, respectively. By such arrangement, it is possible to facilitate the fixed connection of the connection rod 41 with the first conductive cylinder 42 and the second conductive cylinder 43; at the same time, a power transmission channel consisting of the first collar 401 of the first conductive cylinder 42, the collar 44 of the first conductive cylinder 42, the connecting rod 41, the collar 44 of the second conductive cylinder 43 and the first collar 401 of the second conductive cylinder 43 can be formed between two adjacent cables 100 to realize electric transmission.
It should be noted that, each clip 44 sleeved outside the first collar 401 has two opposite connection lugs, that is, the first conductive tube 42 and the second conductive tube 43 are connected by two connection rods 41, and the two connection rods 41 are disposed on both sides of the cable 100 along the axial direction of the cable 100. By the arrangement, the two adjacent cables 100 can be guaranteed to be uniformly stressed at the joint, and the phenomenon that the cables 100 are broken or bent due to uneven stress at the joint is avoided; at the same time, the electrical transmission efficiency between two adjacent cables 100 can also be improved.
In some embodiments, the clips 44 are sleeved outside the third collar 403 of the same set, or one of the clips 44 is sleeved outside the third collar 403, and the other clip 44 is sleeved outside the first collar 401.
In some other embodiments, an insulating sleeve 45 is provided around the outside of the connecting rod 41 and insulating covers 46 are provided over the ends of the connecting rod. By such an arrangement, the insulation of the connection rod 41 and both ends thereof can be improved to avoid the situation in which two adjacent connection rods 41 are discharged from each other.
Referring to fig. 11, fig. 11 is a schematic diagram illustrating a cable connection assembly according to an embodiment of the invention. In some embodiments, the number of cable connection assemblies 40 is multiple; each cable 100 is provided with a plurality of conductive layers 101 sleeved in sequence from inside to outside along the radial direction, each conductive layer 101 is provided with a connecting section, and the plurality of connecting sections are exposed at intervals along the axial direction of the cable 100; two connecting sections of the two cables 100 which are arranged along the exposing direction and correspond to each other in the radial direction are arranged into a group, each group of connecting sections corresponds to one group of cable connecting assemblies 40, and connecting rods 41 in the plurality of groups of cable connecting assemblies 40 are arranged at intervals around the axis of the cable 100.
Specifically, each set of cable connection assemblies 40 includes a first conductive barrel 42, a second conductive barrel 43, and two connecting rods 41. When in connection, a plurality of first conductive cylinders 42 and second conductive cylinders 43 are respectively fixedly sleeved on a plurality of connecting sections on two adjacent cables 100; the ends of the inner skeletons of two adjacent cables 100 are fixedly connected together by welding, and the shielding layers and the insulating layers corresponding to each other on the two inner skeletons are respectively connected by shielding belts and insulating belts in a wrapping manner. The first conductive cylinder 42 and the second conductive cylinder 43 on each set of connection sections are conductively connected by two connection rods 41 of the same length. The two connecting rods 41 in each group of connecting sections are distributed on two sides of the cable 100 by taking the axis of the cable 100 as a symmetry axis, and the plurality of connecting rods 41 in the plurality of groups of connecting sections are arranged at intervals along the axis of the cable 100. Wherein, the different connecting section groups are provided with the same first conductive cylinder 42, the same second conductive cylinder 43 and two connecting rods 41 with different lengths; the two ends of the connecting rod 41 are fixedly connected with the first conductive cylinder 42 and the second conductive cylinder 43 respectively through the clamp 44. With this arrangement, the plurality of sets of cable connection assemblies 40 communicate all of the conductive layers 101 of adjacent two cables 100 to achieve low loss of electrical transmission between the adjacent two cables 100. Meanwhile, the plurality of connection bars 41 in the plurality of groups of connection sections are arranged at intervals around the axis of the cable 100, so that the uniformity of electric field distribution of two adjacent cables 100 and the electrical performance of the whole superconducting cable joint can be improved.
Please refer to fig. 4 and 12. Fig. 12 shows a schematic view of a support frame according to an embodiment of the invention. In some embodiments, the superconducting cable joint further comprises at least two support brackets 80, and the at least two support brackets 80 are spaced apart along the axis of the tube connection assembly 30 and are each connected to the tube connection assembly 30. Specifically, the support frame 80 is composed of a support base 81, a roller frame 82, and rollers 83. One side of the support base 81 is constructed with an arc-shaped groove of the same diameter as the first sleeve 21, and a roller 83 is mounted on one side of the support base 81 facing away from the arc-shaped groove through a roller frame 82. When in use, the support frame 80 clamps the arc-shaped groove of the support seat 81 on the outer side wall of the first sleeve 21 and fixedly connects the arc-shaped groove with the first sleeve 21. By such arrangement, it is possible to provide a supporting function for the superconducting cable joint in the present application, and in the process of moving the superconducting cable joint, the sliding friction with the ground is converted into rolling friction by the roller 83, thereby playing a role of facilitating movement.
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 (6)
1. A superconducting cable joint, characterized in that it comprises:
a tube connection assembly (30) for connection between any adjacent dewar tubes; the pipe connecting assembly (30) is provided with a cable cavity (50) for accommodating a cable (100), a first heat insulation cavity and a second heat insulation cavity, wherein the first heat insulation cavity and the second heat insulation cavity are wrapped on the outer periphery side of the cable cavity (50), the first heat insulation cavity is wrapped on the outer periphery side of the second heat insulation cavity, and the second heat insulation cavity is communicated with a sealing space in the dewar pipe on the same side;
a cable connection assembly (40) for connecting between any adjacent cables (100), the cable connection assembly (40) being accommodated within the cable cavity (50);
the pipe connection assembly (30) comprises a first sleeve (21), a second sleeve (22) and a first interlayer pipe (23); the second sleeve (22) is sleeved outside the first sleeve (21), the first interlayer pipe (23) is provided with a first interlayer cavity, and two side walls of the first interlayer cavity are respectively connected with the ends of the first sleeve (21) and the second sleeve (22) so as to jointly enclose the first heat insulation cavity;
the pipe connection assembly (30) further comprises a second interlayer pipe (24); the second interlayer pipe (24) is connected to the inner side of the first interlayer pipe (23), and a cylinder cavity of the second sleeve (22) and a pipe cavity of the second interlayer pipe (24) are jointly enclosed to form the cable cavity (50); the second interlayer pipe (24) is provided with a second interlayer cavity, two side walls of the second interlayer cavity are used for being respectively connected with the inner layer and the outer layer of the Dewar pipe, and the second interlayer cavity forms the second heat insulation cavity;
the cable connection assembly (40) comprises a connecting rod (41), a first conductive cylinder (42) and a second conductive cylinder (43); the first conduction cylinder (42) and the second conduction cylinder (43) are respectively connected to two ends of the connecting rod (41); the first conductive cylinder (42) is sleeved on one of any two adjacent cables (100), the second conductive cylinder (43) is sleeved on the other cable, and the first conductive cylinder (42) and the second conductive cylinder (43) are connected with the conductive layer (101) of the cable (100) on the same side;
-the first (42) and second (43) conductive barrels each comprise a first collar (401), a second collar (402) and a third collar (403); the second collar (402) is connected to one end of the first collar (401), and one end of the first collar (401) connected with the second collar (402) is inserted between the conductive layer (101) and the insulating layer of the cable (100); the third collar (403) is sleeved on the outer side of the first collar (401) and is used for pressing the conductive layer (101).
2. The superconducting cable joint according to claim 1, characterized in that the first collar (401) and/or the third collar (403) are configured with an injection hole (4011), the injection hole (4011) being used for injecting a curing agent between the first collar (401) and the third collar (403).
3. Superconducting cable joint according to claim 1, characterized in that the first conductive cylinder (42) and the second conductive cylinder (43) each comprise a collar (44), the collar (44) being fitted outside the first collar (401) and/or the third collar (403) of the same group, the collar (44) being intended to be connected to the connecting rod (41).
4. Superconducting cable joint according to claim 1, characterized in that the number of cable connection assemblies (40) is a plurality of groups;
each cable (100) is provided with a plurality of conductive layers (101) sleeved in sequence from inside to outside along the radial direction, each conductive layer (101) is provided with a connecting section, and the plurality of connecting sections are exposed at intervals along the axial direction of the cable (100); two connecting sections which are arranged on the two cables (100) along the exposure direction and correspond to each other in the radial direction are arranged into a group, each group of connecting sections corresponds to one group of cable connecting assemblies (40), and connecting rods (41) in the plurality of groups of cable connecting assemblies (40) are arranged at intervals around the axis of the cables (100).
5. The superconducting cable joint according to claim 1, characterized in that it further comprises at least two support brackets (80), and in that at least two of the support brackets (80) are arranged at intervals along the axial direction of the pipe connection assembly (30) and are each connected to the pipe connection assembly (30).
6. A superconducting cable device comprising a plurality of superconducting cable joints as claimed in any one of claims 1 to 5, further comprising a plurality of superconducting cable bodies, one of said superconducting cable joints being connected between any adjacent one of said superconducting cable bodies.
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| CN202111371764.8A CN114336102B (en) | 2021-11-18 | 2021-11-18 | Superconducting cable joint and device |
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| CN114336102B true CN114336102B (en) | 2023-07-25 |
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| WO2003034447A1 (en) * | 2001-10-12 | 2003-04-24 | Southwire Company | Superconducting cable termination |
| DK3386034T3 (en) * | 2017-04-07 | 2019-07-15 | Nexans | ENCLOSURE TO A SUPER LEADING CABLE AND PROCEDURE FOR BUILDING A FINAL CABLE FOR A SUPER LEADING CABLE |
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| CN114336102A (en) | 2022-04-12 |
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