Three-phase coaxial superconducting cable superconducting tape connecting jig

Abstract

The invention discloses a three-phase coaxial superconducting cable superconducting tape connection jig, which comprises a first superconducting cable, a second superconducting cable, a third superconducting cable and a third superconducting tape, and is characterized in that the end part of the first superconducting cable is provided with a first superconducting tape; a second superconducting tape is arranged at the end part of the second superconducting cable; the first connecting assembly is detachably arranged on the first superconducting tape in a sleeving manner; the second connecting assembly is detachably arranged on the second superconducting tape in a sleeving manner; the first connecting assembly can move spirally in the direction from the first superconducting tape to the second superconducting cable, the second connecting assembly can move spirally in the direction from the second superconducting tape to the first superconducting cable, and the end face of the first connecting assembly abuts against the end face of the second connecting assembly. According to the three-phase coaxial superconducting cable superconducting tape connection jig, alignment welding of the superconducting tapes is facilitated, and connection of two sections of superconducting tapes can be completed in a limited field space; operation is easy, and welding difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting cables, and particularly to a superconducting tape connection jig for a three-phase coaxial superconducting cable. Background Art

[0002] In the prior art, the current-carrying superconducting conductors (superconducting tapes) in a three-phase coaxial superconducting cable are in a multi-parallel form. During the process of connecting two superconducting tapes on-site, the following main problems exist: 1. The number of superconducting tapes is large. If the single-strip corresponding connection method is adopted, the on-site welding is difficult and the efficiency is low, especially for the tapes close to the ground direction, which are difficult to weld; 2. The superconducting tapes have a certain helix angle, and it is difficult to align the tapes, which further increases the on-site welding difficulty. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a superconducting tape connection jig for a three-phase coaxial superconducting cable, which is convenient for aligning and welding the superconducting tapes, can complete the connection of two superconducting tapes within a limited on-site space; is easy to operate and reduces the welding difficulty.

[0004] To solve the above technical problem, the present invention provides a superconducting tape connection jig for a three-phase coaxial superconducting cable, including: a first superconducting cable, with a first superconducting tape provided at the end of the first superconducting cable; a second superconducting cable, with a second superconducting tape provided at the end of the second superconducting cable; a first connection component, detachably sleeved on the first superconducting tape; a second connection component, detachably sleeved on the second superconducting tape; and a bridging section installed on the inner walls of the first connection component and the second connection component, wherein: the first connection component can spirally move along the first superconducting tape towards the second superconducting cable, the second connection component can spirally move along the second superconducting tape towards the first superconducting cable, and the end face of the first connection component abuts against the end face of the second connection component; the first superconducting tape and the second superconducting tape are connected through the bridging section accommodated on the inner walls of the first connection component and the second connection component.

[0005] Wherein, both the first connection component and the second connection component include a plurality of first clamps and a plurality of second clamps, and the plurality of first clamps and the plurality of second clamps are alternately arranged circumferentially around the central axis of the first superconducting cable / second superconducting cable.

[0006] Wherein, the first clamp is provided with a first sliding groove, and a plurality of guiding sliding grooves adapted to the first superconducting tape / second superconducting tape are respectively provided on the inner walls of the first clamp and the second clamp.

[0007] Wherein, the spiral angle of the guiding sliding groove is consistent with the spiral angle of the first superconducting tape / second superconducting tape; the ratio range of the depth dimension of the guiding sliding groove to the thickness dimension of the first superconducting tape / second superconducting tape is 2 - 3; the width dimension of the guiding sliding groove is larger than the width dimension of the first superconducting tape / second superconducting tape.

[0008] The second fixture is provided with a second slide groove, a toggle assembly is provided in the second slide groove, and a sliding head matched with the first slide groove is provided at the end of the toggle assembly.

[0009] The toggle assembly includes a slide bar and a toggle rod, and the sliding head is connected to the end of the slide bar; Wherein: the lever links the slide bar to make the sliding head reciprocate and extend, and the sliding head can be extended out of the end surface of the second clamp; the sliding head moves out of the first slide slot to unlock the first clamp and the second clamp.

[0010] The sliding rod is detachably connected to the shifting rod, and one end of the shifting rod extends to the outside of the second clamp.

[0011] Wherein, through holes for installing heating rods and / or thermocouples are provided on the first clamp and the second clamp; wherein: the heating rod is set to negative feedback control, and the output power of the heating rod is adjusted by temperature measurement of the thermocouple, so that the first connecting component and the second connecting component maintain the set temperature, so as to complete the connection between the bridge section and the first superconducting tape and the second superconducting tape.

[0012] The superconducting surfaces at the ends of the first superconducting tape and the second superconducting tape are provided with tin layers, and the two ends of the bridge section are aligned and connected with the ends of the first superconducting tape and the second superconducting tape respectively.

[0013] The material of the bridge section is a superconducting tape of the same material as the first superconducting tape and the second superconducting tape to be connected, and the critical current of the bridge section is greater than the critical current of the first superconducting tape and the second superconducting tape to be connected.

[0014] The implementation of the three-phase coaxial superconducting cable superconducting tape connection jig of the present invention has the following beneficial effects: the three-phase coaxial superconducting cable superconducting tape connection jig comprises: a first superconducting cable, the end of the first superconducting cable is provided with a first superconducting tape; a second superconducting cable, the end of the second superconducting cable is provided with a second superconducting tape; a first connecting component, the first connecting component is detachably mounted on the first superconducting tape; a second connecting component, the second connecting component is detachably mounted on the second superconducting tape; and a bridging section installed on the inner walls of the first connecting component and the second connecting component, wherein: the first connecting component can be spirally moved along the first superconducting tape toward the second superconducting cable, the second connecting component can be spirally moved along the second superconducting tape toward the first superconducting cable, and the end face of the first connecting component is abutted against the end face of the second connecting component; the first superconducting tape and the second superconducting tape are connected by the bridging section accommodated on the inner walls of the first connecting component and the second connecting component, so that the alignment welding of the superconducting tapes is facilitated, and the connection of the two sections of superconducting tapes can be completed in a limited on-site space; it is easy to operate and reduces the difficulty of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a superconducting tape connection fixture for a three-phase coaxial superconducting cable according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of a cross-section of a superconducting tape connection fixture for a three-phase coaxial superconducting cable according to an embodiment of the present invention.

[0018] Figure 3 It is a schematic side view structure diagram of a first connection component according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic structural diagram of a first fixture according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic structural diagram of a second fixture according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic cross-sectional structure diagram of a second fixture according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic top view structure diagram of a second fixture according to an embodiment of the present invention. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] As Figures 1-7 shown, it is Embodiment 1 of a superconducting tape connection fixture for a three-phase coaxial superconducting cable of the present invention.

[0025] The superconducting tape connection fixture for a three - phase coaxial superconducting cable in this embodiment includes: a first superconducting cable 1, with a first superconducting tape 11 provided at the end of the first superconducting cable 1; a second superconducting cable 2, with a second superconducting tape 12 provided at the end of the second superconducting cable 2; a first connection component 3, detachably sleeved on the first superconducting tape 11; a second connection component 4, detachably sleeved on the second superconducting tape 12; and a bridging section 5 installed on the inner walls of the first connection component 3 and the second connection component 4.

[0026] The first connection component 3 can move spirally along the first superconducting tape 11 towards the second superconducting cable 2, and the second connection component 4 can move spirally along the second superconducting tape 12 towards the first superconducting cable 1. The end face of the first connection component 3 abuts against the end face of the second connection component 4, and the first superconducting tape 11 and the second superconducting tape 12 are connected through the bridging section 5 accommodated on the inner walls of the first connection component 3 and the second connection component 4.

[0027] In specific implementation, by setting the first connection component 3 and the second connection component 4 that can move spirally relative to each other along the first superconducting tape 11 and the second superconducting tape 12 respectively, not only can the first superconducting tape 11 and the second superconducting tape 12 be spirally wound around the skeletons of the first superconducting cable 1 and the second superconducting cable 2 respectively while tightly adhering to the skeletons. At the same time, it is convenient for the bridging section 5 to be spirally wound around the connection skeleton while tightly adhering to the connection skeleton between the two superconducting cables, and it is also convenient for the ends of the first superconducting tape 11 and the second superconducting tape 12 to be aligned for connection with the bridging section 5 to complete the reliable connection of the two superconducting tapes.

[0028] Furthermore, by separately setting the first connection component 3 and the second connection component 4, it is not only convenient to install the first connection component 3 and the second connection component 4 on the first superconducting cable 1 and the second superconducting cable 2 with a certain spiral angle efficiently and reliably respectively, but also convenient to complete the connection of the two superconducting tapes in a limited on - site space, especially the connection of the tapes near the ground direction. Preferably, the first connection component 3 and the second connection component 4 can be made of copper. If the first connection component 3 and the second connection component 4 are not disassembled, the first connection component 3 and the second connection component 4 can reinforce the connection part of the two superconducting tapes, and further ensure the electrical performance and mechanical performance of the superconducting tape joints.

[0029] Furthermore, both the first connection component 3 and the second connection component 4 include a plurality of first clamps 31 and a plurality of second clamps 32, and the plurality of first clamps 31 and the plurality of second clamps 32 are arranged circumferentially and alternately around the central axis of the first superconducting cable 1 / the second superconducting cable 2.

[0030] During implementation, the first clamp 31-the second clamp 32 can be sequentially mounted on the first superconducting cable 1 until all the first clamps 31 and the second clamps 32 are mounted on the first superconducting cable 1, and the first connection component 3 is assembled. Similarly, the second connection component 4 is also composed of a plurality of first clamps 31 and a plurality of second clamps 32. In practical applications, the first clamp 31-the second clamp 32 can be sequentially mounted on the second superconducting cable 2 in the order of the first clamp 31-the second clamp 32 until all the first clamps 31 and the second clamps 32 are mounted on the second superconducting cable 2, and the second connection component 4 is assembled.

[0031] Further, such as Figures 4-5 The figure shows the structure of the first clamp / the second clamp, neither of which has a through hole 301. The first clamp 31 is provided with a first slide groove 311, and the inner walls of the first clamp 31 and the second clamp 32 are respectively provided with a plurality of guide slide grooves 312 adapted to the first superconducting tape 11 / the second superconducting tape 12.

[0032] The second fixture 32 is provided with a second slide groove 322 , a toggle assembly is provided in the second slide groove 322 , and a sliding head 321 matched with the first slide groove 311 is provided at the end of the toggle assembly.

[0033] During implementation, when the first clamp 31-the second clamp 32 are assembled in sequence, the sliding head 321 on the second clamp 32 can be spirally moved along the axial direction of the first superconducting cable 1 / the second superconducting cable 2 and embedded in the first slide groove 311 of the first clamp 31, so that the first clamp 31 and the second clamp 32 are connected together, and finally form an integral first connection component 3 / second connection component 4.

[0034] The guide slots 312 are arranged one by one according to the number of the first superconducting tapes 11 / the second superconducting tapes 12. In this embodiment, the spiral angle of the guide slots 312 is consistent with the spiral angle of the first superconducting tapes 11 / the second superconducting tapes 12. The ratio of the depth of the guide groove 312 to the thickness of the first superconducting tape 11 / the second superconducting tape 12 is in the range of 2-3. Preferably, the depth of the guide groove 312 is 2.5 times the thickness of the first superconducting tape 11 / the second superconducting tape 12.

[0035] Preferably, the width of the guide slot is greater than the width of the first superconducting tape 11 / the second superconducting tape 12. In implementation, in an embodiment where the number of tapes is large and the spacing between adjacent tapes is small, the width of the guide slot 312 may be 3-4 times the width of the first superconducting tape 11 / the second superconducting tape 12, so as to accommodate 2-3 adjacent tapes in the same guide slot 312.

[0036] It can be understood that this arrangement should ensure that the first connecting component 3 and the second connecting component 4 can smoothly move spirally along the axial direction of the first superconducting cable 1 / the second superconducting cable 2 .

[0037] Furthermore, the toggle assembly includes a sliding rod 3211 and a toggle rod 3212, and the sliding head 321 is connected to the end of the sliding rod 3211; wherein: the toggle rod 3212 links the sliding rod 3211 to make the sliding head 321 reciprocate and extend, and extend the sliding head 321 out of the end surface of the second clamp 32; the sliding head 321 moves out of the first sliding groove 311 to unlock the first clamp 31 and the second clamp 32.

[0038] In this embodiment, a slidable toggle assembly is provided to facilitate assembly and disassembly of the first clamp 31 and the second clamp 32 .

[0039] Preferably, the sliding rod 3211 is detachably connected to the lever 3212 , and one end of the lever 3212 extends to the outside of the second clamp 32 .

[0040] Furthermore, through holes 301 for installing a heating rod and / or a thermocouple are provided on the first clamp 31 and the second clamp 32. In this embodiment, the heating rod is set to negative feedback control, and the output power of the heating rod is adjusted by measuring the temperature of the thermocouple, so that the first connecting component 3 and the second connecting component 4 maintain a set temperature, so as to complete the connection between the bridge section 5 and the first superconducting tape 11 and the second superconducting tape 12.

[0041] Furthermore, the material of the bridging section 5 is the same superconducting tape as that of the first superconducting tape 11 and the second superconducting tape 12 to be connected; the size of the bridging section 5 is consistent with the size of the first superconducting tape 11 and the second superconducting tape 12 to be connected; the critical current of the bridging section 5 is at least the same as the critical current of the first superconducting tape 11 and the second superconducting tape 12 to be connected, and preferably, the critical current is greater than the critical current of the first superconducting tape 11 and the second superconducting tape 12 to be connected by more than 20A.

[0042] During implementation, the superconducting surfaces at the ends of the first superconducting tape 11 and the second superconducting tape 12 are provided with a tin layer, and the two ends of the bridge section 5 are aligned and connected to the ends of the first superconducting tape 11 and the second superconducting tape 12 respectively.

[0043] The following steps can be followed to connect the superconducting tapes of the three-phase coaxial superconducting cable by using the three-phase coaxial superconducting cable superconducting tape connection fixture in this embodiment: Measure the end lengths of the first superconducting cable 1 and the second superconducting cable 2, and measure the distance between the end of the first superconducting cable 1 and the end of the second superconducting cable 2. According to the end lengths, the distance between the ends, the helix angle A of the first superconducting tape 11 / second superconducting tape 12, and the spacing d between the tapes of the first superconducting tape 11 / second superconducting tape 12, cut each tape so that the lengths of the adjacent tapes after linear extension differ by the same amount, and the ends of the tapes can be aligned after helical winding. At the same time, prepare a suitable bridging section 5, a first connection assembly 3, and a second connection assembly 4.

[0044] It should be noted that the lengths of the adjacent tapes after cutting and linear extension differ by the same dimension. This not only facilitates the geometric alignment of the tapes of the first superconducting tape 11 / second superconducting tape 12 after being processed by the first connection assembly 3 / second connection assembly 4, thus facilitating the welding and connection of the two superconducting tapes, but also facilitates the identification of the corresponding tapes in the first superconducting tape 11 and the second superconducting tape 12, further facilitating the welding and connection of the two superconducting tapes to improve the welding efficiency, and at the same time facilitating the universal production of the bridging section 5, the first connection assembly 3, and the second connection assembly 4.

[0045] Set the first clamp 31 of the first connection assembly 3 on the end of the first superconducting cable 1 and embed the first superconducting tape 11 in the guiding chute 312 of the first clamp 31. Then set the second clamp 32 of the first connection assembly 3 on the end of the first superconducting cable 1 and embed the first superconducting tape 11 in the guiding chute 312 of the second clamp 32. At the same time, embed the sliding head 321 on the second clamp 32 in the first chute 311 of the first clamp 31; install the first clamp 31 and the second clamp 32 in sequence until the installation of the first connection assembly 3 is completed; similarly, complete the installation of the second connection assembly 4.

[0046] Slide the first connection assembly 3 helically towards the second superconducting cable 2 until the end face of the first connection assembly 3 is 50 - 80 mm away from the end of the first superconducting tape 11; slide the second connection assembly 4 helically towards the first superconducting cable 1 until the end face of the second connection assembly 4 is 50 - 80 mm away from the end of the second superconducting tape 12.

[0047] It should be noted that when the end face of the first connection assembly 3 is 50 - 80 mm away from the end of the first superconducting tape 11 / the end face of the second connection assembly 4 is 50 - 80 mm away from the end of the second superconducting tape 12, the ends of the tapes in the first superconducting tape 11 / second superconducting tape 12 are not completely aligned. The extended length of the tape with the longest distance from the end face of the first connection assembly 3 / second connection assembly 4 may not be greater than 80 mm, and the extended length of the tape with the shortest distance may not be less than 50 mm. This length facilitates subsequent tin coating and ensures the welding length and quality, especially for the welding of the tapes near the ground direction.

[0048] Furthermore, tin is coated on the superconducting surfaces at the ends of the first superconducting strip 11 and the second superconducting strip 12, and the coating length is 50 mm. Then, the two ends of the bridging section 5 are respectively aligned and connected to the ends of the first superconducting strip 11 and the second superconducting strip 12. It should be noted that before connecting the ends of the first superconducting strip 11 and the second superconducting strip 12, the two ends of the bridging section 5 can be chamfered to improve the mechanical properties of the welded joint; the superconducting surface of the bridging section 5 needs to face the superconducting surfaces at the ends of the first superconducting strip 11 / the second superconducting strip 12 to form a "face-to-face" connection and reduce the resistance of the welded joint.

[0049] The first connection component 3 is continuously spirally slid in the direction of the second superconducting cable 2; at the same time, the second connection component 4 is continuously spirally slid in the direction of the first superconducting cable 1 until the first connection component 3 and the second connection component 4 are in mutual abutment, so as to facilitate subsequent heat conduction to heat the first connection component 3 and the second connection component 4 to weld the bridging section 5 to the first superconducting strip 11 and the second superconducting strip 12 together. The first connection component 3 and the second connection component 4 are heated by heat source conduction to weld the bridging section 5 to the first superconducting strip 11 and the second superconducting strip 12 together.

[0050] The superconducting strip connection jig for a three-phase coaxial superconducting cable in this embodiment has the following beneficial effects: The superconducting strip connection jig for a three-phase coaxial superconducting cable includes: a first superconducting cable, with a first superconducting strip provided at the end of the first superconducting cable; a second superconducting cable, with a second superconducting strip provided at the end of the second superconducting cable; a first connection component, detachably sleeved on the first superconducting strip; a second connection component, detachably sleeved on the second superconducting strip; and a bridging section installed on the inner walls of the first connection component and the second connection component, wherein: the first connection component can be spirally moved along the first superconducting strip in the direction of the second superconducting cable, the second connection component can be spirally moved along the second superconducting strip in the direction of the first superconducting cable, and the end face of the first connection component abuts against the end face of the second connection component; the first superconducting strip and the second superconducting strip are connected by the bridging section accommodated on the inner walls of the first connection component and the second connection component, facilitating the alignment and welding of the superconducting strips, and capable of completing the connection of two superconducting strips within a limited on-site space; easy to operate and reducing the welding difficulty.

Claims

1. A three-phase coaxial superconducting cable superconducting tape connection fixture, characterized in that, include: a first superconducting cable, wherein a first superconducting tape is provided at an end of the first superconducting cable; a second superconducting cable, wherein a second superconducting tape is provided at an end of the second superconducting cable; a first connecting component, wherein the first connecting component is detachably mounted on the first superconducting tape; a second connecting component, wherein the second connecting component is detachably mounted on the second superconducting tape; as well as A bridging section installed on the inner walls of the first connecting component and the second connecting component, wherein: The first connecting component can be spirally moved along the first superconducting tape toward the second superconducting cable, and the second connecting component can be spirally moved along the second superconducting tape toward the first superconducting cable, and the end surface of the first connecting component and the end surface of the second connecting component are in contact with each other; The first superconducting tape and the second superconducting tape are connected by the bridge section accommodated on the inner walls of the first connecting component and the second connecting component.

2. The superconducting tape connection fixture for the three-phase coaxial superconducting cable according to claim 1, characterized in that, The first connection assembly and the second connection assembly each include a plurality of first clamps and a plurality of second clamps, and the plurality of first clamps and the plurality of second clamps are alternately arranged circumferentially around a central axis of the first superconducting cable / the second superconducting cable.

3. The superconducting tape connection fixture for a three-phase coaxial superconducting cable according to claim 2, characterized in that, The first fixture is provided with a first slide groove, and the inner walls of the first fixture and the second fixture are respectively provided with a plurality of guide slide grooves adapted to the first superconducting tape / the second superconducting tape.

4. The superconducting tape connection fixture for a three-phase coaxial superconducting cable according to claim 3, wherein The helical angle of the guide slot is consistent with the helical angle of the first superconducting tape / the second superconducting tape; The ratio of the depth of the guide groove to the thickness of the first superconducting tape / the second superconducting tape is in the range of 2-3; The width of the guide slot is greater than the width of the first superconducting tape / the second superconducting tape.

5. The superconducting tape connection fixture for a three-phase coaxial superconducting cable according to claim 3, characterized in that, The second fixture is provided with a second slide groove, a toggle assembly is provided in the second slide groove, and a sliding head matched with the first slide groove is provided at the end of the toggle assembly.

6. The superconducting tape connection jig for a three-phase coaxial superconducting cable as described in claim 5, wherein The toggle assembly includes a slide rod and a toggle rod, and the slide head is connected to the end of the slide rod; Wherein: the lever links the slide bar to make the slide head reciprocate and extend, and the slide head can be extended out of the end surface of the second fixture; The sliding head moves out of the first sliding groove to unlock the first clamp and the second clamp.

7. The superconducting tape connection fixture for a three-phase coaxial superconducting cable according to claim 6, characterized in that The sliding rod is detachably connected to the shifting rod, and one end of the shifting rod extends out of the second clamp.

8. The superconducting tape connection fixture for the three-phase coaxial superconducting cable as described in claim 2, characterized in that, The first fixture and the second fixture are both provided with through holes for installing a heating rod and / or a thermocouple; Wherein: the heating rod is set to negative feedback control, and the output power of the heating rod is adjusted by measuring the temperature of the thermocouple, so that the first connecting component and the second connecting component maintain the set temperature to complete the connection between the bridge section and the first superconducting tape and the second superconducting tape.

9. The superconducting tape connection fixture for a three-phase coaxial superconducting cable according to claim 1, characterized in that The superconducting surfaces at the ends of the first superconducting tape and the second superconducting tape are provided with tin layers, and the two ends of the bridging section are aligned and connected to the ends of the first superconducting tape and the second superconducting tape respectively.

10. The three-phase coaxial superconducting cable superconducting tape connection jig according to claim 1, characterized in that: The material of the bridging section is a superconducting strip material of the same material as the first superconducting strip and the second superconducting strip to be connected, and the critical current of the bridging section is greater than the critical currents of the first superconducting strip and the second superconducting strip to be connected.

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