Tool and method for testing distortion performance of high-temperature superconducting cable

Abstract

The invention discloses a tool and method for testing the distortion performance of a high-temperature superconducting cable, and relates to the technical field of high-temperature superconducting cable testing. Comprising a fixing plate and two supporting blocks, the two supporting blocks are located at the two ends of the fixing plate correspondingly and connected with the fixing plate, stepped through holes are formed in the ends, away from the fixing plate, of the supporting blocks, the stepped through holes in the two supporting blocks are symmetrically formed, and connecting shafts are arranged at the ends, close to each other, of two torsion discs; the diameter of the connecting shaft is smaller than that of the torsion disc, the outer diameter of the torsion disc and the outer diameter of the connecting shaft are matched with the inner diameter of the stepped through hole, the connecting shaft penetrates through the stepped through hole, one end of the torsion disc extends into the stepped through hole, the torsion disc is connected with the supporting block through a connecting piece, and the end, away from the torsion disc, of the connecting shaft is connected with the torsion frame. And the twisting frame is connected with the high-temperature superconducting cable. According to the tool for testing the distortion performance of the high-temperature superconducting cable, the distortion performance testing efficiency of the high-temperature superconducting cable in a liquid nitrogen environment is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-temperature superconducting cable testing, and more particularly to a tool and method for testing the twist performance of a high-temperature superconducting cable. BACKGROUND

[0002] High-temperature superconducting cables have great application potential in many fields due to their zero-resistance conduction characteristics above the critical temperature. In the field of power transmission, high-temperature superconducting cables can greatly reduce power transmission loss and improve power transmission efficiency, effectively alleviating energy shortages. For example, in long-distance high-capacity power transmission lines, the use of high-temperature superconducting cables can reduce thermal losses during power transmission and deliver more power to the user end. In the field of medical equipment, such as magnetic resonance imaging (MRI) equipment, the use of high-temperature superconducting cables can improve magnetic field strength and uniformity, thereby improving image clarity and diagnostic accuracy.

[0003] Currently, there are many deficiencies in the testing tools for the twist performance of high-temperature superconducting cables. From the perspective of structural design, existing testing tools are often too complex, containing a large number of components, which not only increases the manufacturing cost of the tool, but also makes the installation and debugging process of the tool cumbersome.

[0004] Therefore, it is an urgent problem for those skilled in the art to provide a tool that is simple in structure, easy to operate, and can efficiently perform twist testing in a liquid nitrogen environment. SUMMARY

[0005] Therefore, the present application provides a tool and method for testing the twist performance of a high-temperature superconducting cable, which is simple in structure, easy to operate, and ensures the efficiency of twist performance testing of a high-temperature superconducting cable in a liquid nitrogen environment. To achieve the above purpose, the present application adopts the following technical solutions:

[0006] On the one hand, the present application provides a tool for testing the twist performance of a high-temperature superconducting cable, comprising:

[0007] The support assembly comprises a fixed plate and support blocks, two support blocks are provided, and the two support blocks are located at both ends of the fixed plate and connected with the fixed plate. The end of the support block away from the fixed plate is provided with a stepped through hole, and the stepped through holes on the two support blocks are symmetrically arranged;

[0008] The connecting assembly comprises two torsion discs and two torsion frames, one end of the two torsion discs is provided with a connecting shaft, the diameter of the connecting shaft is smaller than the diameter of the torsion disc, the outer diameter of the torsion disc and the connecting shaft is adapted to the inner diameter of the stepped through hole, the connecting shaft penetrates the stepped through hole, one end of the torsion disc extends into the stepped through hole, the torsion disc is connected with the support block through a connecting piece, the end of the connecting shaft away from the torsion disc is connected with the torsion frame, and the torsion frame is connected with the high-temperature superconducting cable.

[0009] Further, the connecting piece is a bolt, the support block is provided with a first through hole extending from one end of the support block away from the fixed plate to the stepped through hole, the side wall of one end of the torsion disc extending into the stepped through hole is uniformly provided with a plurality of connecting holes, the size of the connecting hole is adapted to the size of the first through hole, and the bolt is sequentially inserted into the first through hole and the connecting hole to realize the connection of the torsion disc and the support.

[0010] Further, the connecting piece is a first bolt, the support block is provided with a first threaded hole extending from one end of the support block away from the fixed plate to the stepped through hole, and the first bolt is connected in the first threaded hole and abuts against the connecting shaft.

[0011] Further, the torsion frame comprises a horizontal plate and a vertical plate, the horizontal plate is provided with two, the two horizontal plates are spaced apart and respectively fixed at two ends of the vertical plate, the horizontal plate is located at the side of the two vertical plates away from each other, the vertical plate is connected with the connecting shaft, and the horizontal plate is connected with the high-temperature superconducting cable.

[0012] Further, one end of the connecting shaft away from the torsion disc is provided with a square limiting block, the square limiting block is provided with a second threaded hole extending into the connecting shaft, one side of the vertical plate away from the horizontal plate is provided with a limiting groove, the shape of the limiting groove is adapted to the square limiting block, the limiting groove is provided with a third threaded hole, and the second threaded hole and the third threaded hole are connected with a second bolt.

[0013] Further, the horizontal plate is uniformly provided with a plurality of fourth threaded holes penetrating the horizontal plate, and the fourth threaded hole is connected with a third bolt.

[0014] Further, the fixed plate is provided with a plurality of long through holes, one end of the support block close to the fixed plate is provided with a fixed threaded hole, and the fixed plate and the support block are connected through a fourth bolt.

[0015] Furthermore, the end of the connecting shaft away from the torsion disc is provided with a slot for placing a retaining ring.

[0016] On the other hand, the present invention provides a method for testing the torsion performance of high-temperature superconducting cables. The method utilizes the aforementioned fixture for testing the torsion performance of high-temperature superconducting cables and includes the following steps:

[0017] S100: Mounting fixing plate, support block, torsion disc and torsion frame;

[0018] S200: Connects high-temperature superconducting cables and twisting frames;

[0019] S300: Rotating high-temperature superconducting cable;

[0020] S400: The entire fixture is placed in liquid nitrogen for testing.

[0021] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a tooling for testing the torsion performance of high-temperature superconducting cables. The two ends of the high-temperature superconducting cable are fixed to two torsion frames respectively. A rotating torsion disc connects a support block and the torsion disc. By rotating the torsion disc, the high-temperature superconducting cable is torsioned. By connecting the support block to the torsion disc at different positions, the torsion angle of the high-temperature superconducting cable is adjusted. The support assembly is directly immersed in liquid nitrogen for torsion performance testing, which improves the efficiency of torsion performance testing of high-temperature superconducting cables. The cable is torsioned to different angles, and testing is conducted at different torsion angles, improving the comprehensiveness of torsion performance testing and ensuring the accuracy of test results. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the tooling provided by the present invention for testing the torsion performance of high-temperature superconducting cables;

[0024] Figure 2 This is a schematic diagram of the structure of the torsion disk provided by the present invention;

[0025] Figure 3 A schematic diagram of the torsion disk provided by the present invention from another perspective;

[0026] Figure 4 This is a schematic diagram of the structure of the support block provided by the present invention;

[0027] Figure 5 A schematic diagram of the structure of the torsion frame provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the fixing plate provided by the present invention.

[0029] In the diagram: 1. Torsion disc; 2. Support block; 3. Torsion frame; 4. High-temperature superconducting cable; 5. Fixing plate; 6. Second threaded hole; 7. Square limiting block; 8. Connecting hole; 9. First through hole; 10. First threaded hole; 11. Stepped through hole; 12. Fixing threaded hole; 13. Fourth threaded hole; 14. Third threaded hole; 15. Limiting groove; 16. Connecting shaft; 17. Horizontal plate; 18. Vertical plate; 19. Long through hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] See Figures 1-6 On one hand, embodiments of the present invention disclose a tooling for testing the torsion performance of high-temperature superconducting cables, comprising:

[0032] The support assembly includes a fixed plate 5 and a support block 2. There are two support blocks 2, which are located at both ends of the fixed plate 5 and connected to the fixed plate 5. A stepped through hole 11 is provided at the end of the support block 2 away from the fixed plate 5. The stepped through holes 11 on the two support blocks 2 are symmetrically arranged.

[0033] The connecting assembly includes two torsion disks 1 and two twisted frames 3. The two torsion disks 1 are provided with a connecting shaft 16 at one end close to each other. The diameter of the connecting shaft 16 is smaller than the diameter of the torsion disks 1. The outer diameter of the torsion disks 1 and the connecting shaft 16 is adapted to the inner diameter of the stepped through hole 11. The connecting shaft 16 passes through the stepped through hole 11. One end of the torsion disk 1 extends into the stepped through hole 11. The torsion disk 1 is connected to the support block 2 through a connector. The end of the connecting shaft 16 away from the torsion disk 1 is connected to the twisted frame 3. The twisted frame 3 is connected to the high-temperature superconducting cable 4.

[0034] Before testing, the high-temperature superconducting cable 4 is fixed between two twisting frames 3, and the twisting disc 1 and support block 2 at one end are connected. The twisting disc 1 at the other end is rotated to twist the high-temperature superconducting cable 4. When the high-temperature superconducting cable 4 is twisted to the predetermined angle, the twisting disc 1 and support block 2 are connected, and the entire fixture is placed in liquid nitrogen to conduct the torsion performance test. The operation is simple and the testing efficiency is improved.

[0035] In some embodiments, the high-temperature superconducting cable 4 is a cable wound with REBCO second-generation high-temperature superconducting tape, with a circular core, and terminals at both ends of the high-temperature superconducting cable 4 for connecting to a power source.

[0036] In some embodiments, the connector is a pin, and the support block 2 is provided with a first through hole 9. The first through hole 9 extends from the end of the support block 2 away from the fixing plate 5 to the stepped through hole 11. A plurality of connecting holes 8 are evenly provided on the side wall of the end of the torsion disc 1 that extends into the stepped through hole 11. The size of the connecting holes 8 is adapted to the size of the first through hole 9. The pin is inserted into the first through hole 9 and the connecting holes 8 in sequence to realize the connection between the torsion disc 1 and the support.

[0037] In some embodiments, the angle between two adjacent connecting holes 8 is 15°.

[0038] When connecting the torsion disk 1 and the support block 2, use a pin to pass through the first through hole 9 and the connecting hole 8 in sequence to install the torsion frame 3 and connect the high-temperature superconducting cable 4. Before testing, remove the pin at one end and rotate the torsion disk 1 at this end so that the torsion frame 3 rotates with the torsion disk 1, thereby driving one end of the high-temperature superconducting cable 4 to rotate. At this time, one end of the high-temperature superconducting cable 4 rotates relative to the other end, causing the high-temperature superconducting cable 4 to be twisted at an angle. When the high-temperature superconducting cable 4 is twisted to the predetermined angle, adjust the position of the torsion disk 1 so that the positions of the first through hole 9 and the connecting hole 8 are aligned, reinsert the pin, and keep the high-temperature superconducting cable 4 at this twist angle. Place the entire fixture into liquid nitrogen and perform a torsion performance test on the high-temperature superconducting cable 4 at this twist angle.

[0039] After performing a torsion performance test on the high-temperature superconducting cable 4 at one torsion angle, there is no need to remove the fixture. Simply remove the pin, rotate the torsion disk 1 to change the torsion angle of the high-temperature superconducting cable 4, insert the pin again, and then perform a torsion performance test on the high-temperature superconducting cable 4 at another torsion angle.

[0040] In some embodiments, the connector is a first bolt, and the support block 2 is provided with a first threaded hole 10. The first threaded hole 10 extends from the end of the support block 2 away from the fixing plate 5 to the stepped through hole 11. The first bolt is connected in the first bolt hole and abuts against the connecting shaft 16.

[0041] During the process of adjusting the torsion angle of the high-temperature superconducting cable 4, when the torsion angle of the high-temperature superconducting cable 4 reaches the predetermined torsion angle, the first bolt is rotated to press the torsion disk 1, thereby fixing the torsion disk 1 and the support block 2. By abutting at different positions between the first bolt and the torsion disk 1, the high-temperature superconducting cable 4 can be stopped at any torsion angle, thereby realizing the torsion performance test of the high-temperature superconducting cable 4 at any torsion angle and improving the comprehensiveness of the torsion internal test of the high-temperature superconducting cable 4.

[0042] In some embodiments, the torsion frame 3 includes a horizontal plate 17 and a vertical plate 18. There are two horizontal plates 17, which are spaced apart and fixed at both ends of the vertical plate 18. The horizontal plates 17 are located on the side of the two vertical plates 18 that are close to each other. The vertical plates 18 are connected to the connecting shaft 16, and the horizontal plates 17 are connected to the high-temperature superconducting cable 4.

[0043] In some embodiments, a square limiting block 7 is provided at the end of the connecting shaft 16 away from the torsion disk 1. A second threaded hole 6 is provided on the square limiting block 7, and the second threaded hole 6 extends into the connecting shaft 16. A limiting groove 15 is provided on the side of the vertical plate 18 away from the horizontal plate 17. The shape of the limiting groove 15 is adapted to the square limiting block 7. A third threaded hole 14 is provided in the limiting groove 15. A second bolt is connected to both the second threaded hole 6 and the third threaded hole 14.

[0044] During the process of connecting the torsion disc 1 and the torsion frame 3, the square limiting block 7 is placed in the limiting groove 15, and the second bolt passes through the third threaded hole 14 and the second threaded hole 6 in sequence to realize the connection between the connecting shaft 16 and the torsion frame 3, thereby realizing the connection between the torsion disc 1 and the torsion frame 3. Through the cooperation between the square limiting block 7 and the limiting groove 15, the torsion disc 1 can drive the torsion frame 3 to rotate, avoiding relative rotation between the torsion disc 1 and the torsion frame 3 during the rotation of the torsion disc 1, and ensuring the stability of the connection between the torsion disc 1 and the torsion frame 3.

[0045] In some embodiments, a plurality of fourth threaded holes 13 are uniformly provided on the horizontal plate 17, and a third bolt is connected in the fourth threaded hole 13.

[0046] During the process of fixing the high-temperature superconducting cable 4, the two ends of the high-temperature superconducting cable 4 are placed between the horizontal plates 17 of the two twisting frames 3 respectively. The third bolt is rotated until the third bolt contacts the high-temperature superconducting cable 4. The third bolt is rotated again to press the high-temperature superconducting cable 4 between the upper and lower ends of the third bolt, thus completing the fixing of the high-temperature superconducting cable 4.

[0047] In some embodiments, the fixing plate 5 is provided with a plurality of elongated through holes 19, and the support block 2 is provided with a fixing threaded hole 12 at one end near the fixing plate 5. The fixing plate 5 and the support block 2 are connected by a fourth bolt.

[0048] According to the length of the high-temperature superconducting cable 4, adjust the position of the support block 2. When the support block 2 reaches the appropriate position, screw the fourth bolt into the fixing threaded hole 12 through the elongated through hole 19 to realize the connection between the fixing plate 5 and the support block 2, so that the distance between the two support blocks 2 is adapted to the length of the high-temperature superconducting cable 4, and ensure the accuracy of the torsion performance test of the high-temperature superconducting cable 4.

[0049] In some embodiments, the fixing plate 5 is made of glass fiber epoxy resin composite material.

[0050] In some embodiments, the end of the connecting shaft 16 away from the torsion disk 1 is provided with a placement groove for connecting the retaining ring.

[0051] The connecting shaft 16 is limited by the cooperation of the snap ring and the disc to prevent axial movement of the connecting shaft 16.

[0052] In some embodiments, the support block 2 is provided with a first through hole 9 and a first bolt hole.

[0053] In some embodiments, the first bolt, the second bolt, the third bolt, the fourth bolt, and the pin are all made of aluminum alloy.

[0054] On the other hand, embodiments of the present invention disclose a method for testing the torsion performance of high-temperature superconducting cables. The method utilizes the aforementioned fixture for testing the torsion performance of high-temperature superconducting cables and includes the following steps:

[0055] S100: Install the fixing plate 5, support block 2, torsion disc 1, and torsion frame 3. The specific operation is as follows:

[0056] S110: Place the support block 2 above the elongated through hole 19 of the fixing plate 5, adjust the distance between the two support blocks 2, and connect the support block 2 and the fixing plate 5 with the fourth bolt;

[0057] S120: Insert the connecting shaft 16 into the stepped through hole 11, install the retaining spring for limiting, and insert the pin into the first through hole 9 and the connecting hole 8 to fix the torsion disc 1 and the support block 2.

[0058] S130: Place the square limiting block 7 into the limiting groove 15 and tighten the second bolt.

[0059] S200: Connects the high-temperature superconducting cable 4 and the twisting frame 3. The specific operation is as follows:

[0060] S210: Place both ends of the high-temperature superconducting cable 4 between the two horizontal plates 17 of the two twisting frames 3 at both ends, and rotate the third bolt to fix the high-temperature superconducting cable 4 on the twisting frame 3.

[0061] S300: Rotating high-temperature superconducting cable 4, the specific operation is as follows:

[0062] S310: Pull out the pin in the first through hole 9 and the connecting hole 8 at one end, rotate the twisting disc 1 to twist the high-temperature superconducting cable 4. When the twisting angle is a multiple of 15°, insert the pin back to fix the twisting disc 1 and the support block 2. When the twisting angle is not a multiple of 15°, tighten the first bolt to fix the twisting disc and the support block 2.

[0063] S400: The entire fixture is placed in liquid nitrogen for testing.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooling for testing the torsion performance of high-temperature superconducting cables, characterized in that, include: A support assembly includes a fixed plate and two support blocks. The two support blocks are located at both ends of the fixed plate and connected to the fixed plate. A stepped through hole is provided at the end of the support block away from the fixed plate. The stepped through holes on the two support blocks are symmetrically arranged. The connecting assembly includes two torsion disks and two twisting frames. A connecting shaft is positioned near one end of each torsion disk. The diameter of the connecting shaft is smaller than the diameter of the torsion disks. The outer diameters of the torsion disks and the connecting shaft are adapted to the inner diameter of the stepped through-hole. The connecting shaft passes through the stepped through-hole. One end of each torsion disk extends into the stepped through-hole. The torsion disk is connected to the support block via a connector. The end of the connecting shaft away from the torsion disk is connected to the twisting frame. The twisting frame is connected to the high-temperature superconducting cable.

2. The tooling for testing the torsion performance of high-temperature superconducting cables according to claim 1, characterized in that, The connector is a pin. The support block is provided with a first through hole. The first through hole extends from the end of the support block away from the fixed plate to the stepped through hole. The side wall of the end of the torsion disc that extends into the stepped through hole is evenly provided with a plurality of connecting holes. The size of the connecting holes is adapted to the size of the first through hole. The pin is inserted into the first through hole and the connecting holes in sequence to realize the connection between the torsion disc and the support.

3. The tooling for testing the torsion performance of high-temperature superconducting cables according to claim 1, characterized in that, The connector is a first bolt, and the support block is provided with a first threaded hole. The first threaded hole extends from the end of the support block away from the fixed plate to the stepped through hole. The first bolt is connected in the first bolt hole and abuts against the connecting shaft.

4. The tooling for testing the torsion performance of high-temperature superconducting cables according to claim 1, characterized in that, The torsion frame includes a horizontal plate and a vertical plate. There are two horizontal plates, which are spaced apart and fixed at both ends of the vertical plate. The horizontal plates are located on the side of the two vertical plates that are close to each other. The vertical plates are connected to the connecting shaft, and the horizontal plates are connected to the high-temperature superconducting cable.

5. The fixture for testing the torsion performance of high-temperature superconducting cables according to claim 4, characterized in that, A square limiting block is provided at the end of the connecting shaft away from the torsion disk. A second threaded hole is provided on the square limiting block, which extends into the connecting shaft. A limiting groove is provided on the side of the vertical plate away from the horizontal plate. The shape of the limiting groove is adapted to the square limiting block. A third threaded hole is provided in the limiting groove. A second bolt is connected to both the second and third threaded holes.

6. The fixture for testing the torsion performance of high-temperature superconducting cables according to claim 5, characterized in that, The horizontal plate is evenly provided with a plurality of fourth threaded holes that penetrate the horizontal plate, and a third bolt is connected in the fourth threaded hole.

7. The fixture for testing the torsion performance of high-temperature superconducting cables according to claim 1, characterized in that, The fixing plate is provided with multiple elongated through holes, and the support block is provided with a fixing threaded hole at one end near the fixing plate. The fixing plate and the support block are connected by a fourth bolt.

8. The fixture for testing the torsion performance of high-temperature superconducting cables according to claim 1, characterized in that, The end of the connecting shaft away from the torsion disc is provided with a slot for placing a retaining ring.

9. A method for testing the torsion performance of high-temperature superconducting cables, characterized in that, The method uses the fixture for testing the torsion performance of high-temperature superconducting cables as described in any one of claims 1-8, and includes the following steps: S100: Mounting fixing plate, support block, torsion disc and torsion frame; S200: Connects high-temperature superconducting cables and twisting frames; S300: Rotating high-temperature superconducting cable; S400: The entire fixture is placed in liquid nitrogen for testing.

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