Device and method for preparing high-temperature superconductor vertical terminal

Abstract

The invention discloses a preparation device and method of a high-temperature superconductor vertical terminal. Relates to the technical field and comprises a high-conductivity medium storage tank, the top of which is provided with an opening, the side wall close to the opening is provided with a threaded through hole, and the side wall close to the bottom of the high-conductivity medium storage tank is provided with a first through hole; an exhaust hole is formed in the top of the vertical terminal structure, a square hole is formed in the bottom of the vertical terminal structure, a cylindrical through hole is formed in the vertical terminal structure, a conductor external armor is inserted into the square hole, and a second through hole is formed in the position, close to the square hole, of the side wall of the vertical terminal structure; and the heating and heat preservation assembly comprises a first heating plate, a second heating plate and a third heating plate, the first heating plate is arranged to be a C-shaped plate, and the second heating plate and the third heating plate are arranged to be square plates. According to the invention, terminal preparation of a large-sized molded conductor is facilitated, and installation is easy; the high-conductivity medium is filled from the bottom to the top of the vertical terminal structure, so that air holes are prevented from being generated in the vertical terminal structure.

Description

Technical Field

[0001] The present invention relates to the technical field, and more particularly to a device and method for preparing a vertical terminal of a high-temperature superconductor. Background Art

[0002] Superconducting materials are a class of materials with special physical properties. They have good application prospects and broad market background in technical fields such as large particle colliders, superconducting motors, thermonuclear fusion magnets and magnetic resonance imaging, and have extremely high scientific research value.

[0003] The second-generation high-temperature superconductor is one of the candidate materials for future high-field superconducting magnets due to its excellent characteristics such as high critical transition temperature, high current density, high upper critical magnetic field, low quenching rate and no need for superconducting phase heat treatment.

[0004] CORC cables derived from high-temperature superconducting tapes are made by winding the tapes on a core rod in multiple layers to limit AC losses. Larger CORC cables can be used as high-current transmission cables, while smaller CORC cables can be formed into CICC conductors or magnet coils.

[0005] However, the CORC cables required in practical applications are relatively long, and depending on the different usage conditions and space limitations, superconductor joints are often required to achieve electrical connections between cables and current leads, conductors and conductors, and coils and coils. There are two main connection methods for high-temperature superconducting tape joints. One is superconducting welding, which is a relatively complex process with extremely high equipment requirements and requires specific experimental conditions. The other is resistance welding, which is mainly divided into three types: mechanical crimping, diffusion welding, and brazing. Brazing is simple to operate and low in cost, and is widely used. Based on this connection method, a high-conductivity medium filling method, a method for preparing cable conductor joints, was derived.

[0006] At the same time, in order to fully reflect the superconducting properties of the strip and reduce the heat load of the superconducting magnet, the joint resistance should be as small as possible.

[0007] At present, traditional methods for preparing high-temperature superconductor joints mostly use a horizontal placement method, which is prone to produce bubbles and defects, affecting the performance of high-temperature superconductor joints.

[0008] Therefore, how to provide a device and method for preparing a high-temperature superconductor vertical terminal that improves the joint performance of a high-temperature superconductor is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0009] In view of this, the present invention provides a method for solving one of the problems in the above-mentioned background technology and improving the joint performance of high-temperature superconductors.

[0010] In order to achieve the above object, on the one hand, the present invention adopts the following technical solution:

[0011] A device for preparing a high-temperature superconductor vertical terminal, comprising:

[0012] A high conductive medium storage tank, wherein the top of the high conductive medium storage tank is provided with an opening, a side wall of the high conductive medium storage tank near the opening is provided with a threaded through hole, two threaded through holes are arranged at intervals in the horizontal direction, and a first through hole is provided on the side wall of the high conductive medium storage tank near the bottom;

[0013] A vertical terminal structure, wherein an exhaust hole is provided at the top of the vertical terminal structure, a square hole is provided at the bottom of the vertical terminal structure, a cylindrical through hole is provided inside the vertical terminal structure, the cylindrical through hole communicates with the cylindrical through hole and the square hole, an outer armor of a conductor is inserted into the square hole, a second through hole is provided near the square hole on the side wall of the vertical terminal structure, and the second through hole is connected to the first through hole through a connecting copper tube;

[0014] The heating and insulation component includes a first heating plate, a second heating plate and a third heating plate, the first heating plate is configured as a C-shaped plate, the second heating plate and the third heating plate are both configured as square plates, a countersunk hole is provided on the side wall of the second heating plate near the top, two countersunk holes are provided corresponding to the threaded through holes, a through groove is provided at the bottom of the second heating plate, the through groove is adapted to the connecting copper tube, the first heating plate and the third heating plate cooperate to wrap the high-conductivity medium storage tank and the vertical terminal structure, and the second heating plate is arranged between the high-conductivity medium storage tank and the vertical terminal structure.

[0015] Furthermore, it also includes a temperature control computer, which is connected to the first heating plate, the second heating plate and the third heating plate through wires.

[0016] Furthermore, it also includes a bolt, which connects the threaded through hole and the countersunk hole.

[0017] Furthermore, the side length of the square hole is greater than the side length of the conductor outer armor, a step limit is set at 10 mm from the bottom end surface of the vertical terminal structure, and the length of the conductor outer armor inserted into the vertical terminal structure is 10 mm.

[0018] On the other hand, the present invention discloses a method for preparing a high-temperature superconductor vertical terminal, based on the above-mentioned preparation device of a high-temperature superconductor vertical terminal, comprising the following steps:

[0019] Step 1: Connect the vertical terminal structure with the interior of the high-conductivity medium storage tank through a connecting copper pipe;

[0020] Step 2: Connect the first heating plate, the second heating plate and the third heating plate to the vertical terminal structure and the high-conductivity medium storage tank, and use an external clamp to clamp them to fix them to each other;

[0021] Step 3: Turn on the temperature control computer to heat the first heating plate, the second heating plate and the third heating plate, so that the vertical terminal structure and the high-conductivity medium storage tank are quickly heated to 10-15°C above the melting point of the high-conductivity medium;

[0022] Step 4: Insert the conductor outer armor into the square hole at the bottom of the vertical terminal structure. The length of the conductor outer armor inserted into the vertical terminal structure is 10 mm.

[0023] Step 5: Pour the liquid high-conductive medium with a temperature 10-15°C higher than the melting point of the high-conductive medium into the top opening of the high-conductive medium storage tank, observe the exhaust hole on the top of the vertical terminal structure, and stop pouring the liquid high-conductive medium until the liquid level of the high-conductive medium is flush with the top of the vertical terminal structure;

[0024] Step 6: Turn off the temperature control computer, stop heating the first heating plate, the second heating plate and the third heating plate, and use the cooling device to reduce the temperature of the first heating plate, the second heating plate and the third heating plate to below the melting point of the high conductive medium.

[0025] It can be seen from the above technical scheme that compared with the prior art, the present invention discloses a device and method for preparing a high-temperature superconductor vertical terminal, which is used to heat and insulate a high-conductivity medium storage tank and a high-temperature superconductor vertical terminal through a heating and insulation component, and by filling the high-conductivity medium into the high-conductivity medium storage tank, the high-conductivity medium in the vertical terminal structure is filled from bottom to top using the principle of communicating vessels, and the occurrence of pores caused by the traditional top-down pouring of the high-conductivity medium can be avoided; it is used for terminal preparation of large-scale formed conductors and is easy to install; the high-conductivity medium is filled from the bottom to the top of the vertical terminal structure, avoiding the generation of pores inside the vertical terminal structure, and can improve the joint performance of the high-temperature superconductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a high-temperature superconductor vertical terminal preparation device provided by the present invention;

[0028] Figure 2 A front view of the high-temperature superconductor vertical terminal preparation device provided by the present invention;

[0029] Figure 3 A side view of a high-temperature superconductor vertical terminal preparation device provided by the present invention;

[0030] Figure 4 A top view of a high-temperature superconductor vertical terminal preparation device provided by the present invention;

[0031] Figure 5 This is a structural schematic diagram of the high-temperature superconductor vertical terminal preparation device provided by the present invention (in use state).

[0032] Among them: 1 is a high-conductivity medium storage tank; 2 is an opening; 3 is a threaded through hole; 4 is a first through hole; 5 is a vertical terminal structure; 6 is an exhaust hole; 7 is a square hole; 8 is a cylindrical through hole; 9 is an outer armor of the conductor; 10 is a connecting copper tube; 11 is a first heating plate; 12 is a second heating plate; 13 is a third heating plate; 14 is a countersunk hole; 15 is a through groove; 16 is a temperature control computer; 17 is a bolt. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-5 The embodiment of the present invention discloses a device for preparing a high-temperature superconductor vertical terminal, comprising:

[0035] A high conductive medium storage tank 1, wherein an opening 2 is provided on the top of the high conductive medium storage tank 1, a threaded through hole 3 is provided on the side wall of the high conductive medium storage tank 1 near the opening 2, two threaded through holes 3 are arranged at intervals in the horizontal direction, and a first through hole 4 is provided on the side wall of the high conductive medium storage tank 1 near the bottom;

[0036] A vertical terminal structure 5, a vent hole 6 is provided on the top of the vertical terminal structure 5, a square hole 7 is provided on the bottom of the vertical terminal structure 5, a cylindrical through hole 8 is provided inside the vertical terminal structure 5, the cylindrical through hole 8 connects the cylindrical through hole 8 and the square hole 7, a conductor outer armor 9 is inserted into the square hole 7, a second through hole is provided on the side wall of the vertical terminal structure 5 near the square hole 7, the second through hole is connected to the first through hole 4 through a connecting copper tube 10; the vertical terminal structure 5 is connected to the interior of the high-conductivity medium storage tank 1 through the connecting copper tube 10;

[0037] A heating and heat preservation component comprises a first heating plate 11, a second heating plate 12 and a third heating plate 13. The first heating plate 11 is set as a C-shaped plate, and the second heating plate 12 and the third heating plate 13 are both set as square plates. A countersunk hole 14 is provided on the side wall near the top of the second heating plate 12. Two countersunk holes 14 are provided corresponding to the threaded through holes 3. A penetration groove 15 is provided at the bottom of the second heating plate 12. The penetration groove 15 is adapted to the connecting copper tube 10. The first heating plate 11 and the third heating plate 13 cooperate to wrap the high-conductivity medium storage tank 1 and the vertical terminal structure 5. The second heating plate 12 is arranged between the high-conductivity medium storage tank 1 and the vertical terminal structure 5; the heating and heat preservation component is used to heat and insulate the high-conductivity medium storage tank 1 and the vertical terminal structure 5; the first heating plate 11, the second heating plate 12 and the third heating plate 13 wrap the vertical terminal structure 5 and the high-conductivity medium storage tank 1 to achieve heating and heat preservation;

[0038] In this embodiment, a temperature control computer 16 is also included, and the temperature control computer 16 is connected to the first heating plate 11, the second heating plate 12 and the third heating plate 13 through wires; the temperature control computer 16 is used to rapidly heat the inner wall of the vertical terminal structure 5 and the inner wall of the high conductive medium storage tank 1 to 10-15°C above the melting point of the high conductive medium.

[0039] In this embodiment, bolts 17 are further included, and the bolts 17 connect the threaded through holes 3 and the countersunk holes 14 ; the vertical terminal structure 5 , the high-conductivity medium storage tank 1 and the second heating plate 12 are fastened by the bolts 17 .

[0040] In this embodiment, the side length of the square hole 7 is greater than the side length of the conductor outer armor 9, a step limit is set at 10 mm from the bottom end surface of the vertical terminal structure 5, and the length of the conductor outer armor 9 inserted into the vertical terminal structure 5 is 10 mm.

[0041] On the other hand, the present invention discloses a method for preparing a high-temperature superconductor vertical terminal, based on the above-mentioned preparation device of a high-temperature superconductor vertical terminal, comprising the following steps:

[0042] Step 1: connect the vertical terminal structure 5 with the interior of the high-conductivity medium storage tank 1 through the connecting copper tube 10;

[0043] Step 2: Connect the first heating plate 11, the second heating plate 12 and the third heating plate 13 to the vertical terminal structure 5 and the high-conductivity medium storage tank 1, and use an external clamp to clamp them to fix them to each other;

[0044] Step 3: Turn on the temperature control computer 16 to heat the first heating plate 11, the second heating plate 12 and the third heating plate 13, so that the vertical terminal structure 5 and the high conductive medium storage tank 1 are quickly heated to 10-15° C. above the melting point of the high conductive medium;

[0045] Step 4: Insert the conductor outer armor 9 into the square hole 7 at the bottom of the vertical terminal structure 5. The length of the conductor outer armor 9 inserted into the vertical terminal structure 5 is 10 mm.

[0046] Step 5: Pour the liquid high-conductive medium at a temperature 10-15° C. above the melting point of the high-conductive medium into the top opening 2 of the high-conductive medium storage tank 1, observe the exhaust hole 6 at the top of the vertical terminal structure 5, and stop pouring the liquid high-conductive medium until the liquid level of the high-conductive medium is flush with the top of the vertical terminal structure 5;

[0047] Step 6: Turn off the temperature control computer 16, stop heating the first heating plate 11, the second heating plate 12 and the third heating plate 13, and use the cooling device to reduce the temperature of the first heating plate 11, the second heating plate 12 and the third heating plate 13 to below the melting point of the high conductive medium.

[0048] In addition, in this embodiment, the second through hole on the vertical terminal structure 5 has a size of M10 and is centrally disposed.

[0049] The material of the high conductive medium storage tank 1 is 304 stainless steel. The size of the first through hole 4 on the high conductive medium storage tank 1 is M10. The first through hole 4 is 13 mm away from the bottom of the high conductive medium storage tank 1 and is centrally arranged. The size of the threaded through hole 3 is M10.

[0050] The vertical terminal structure 5 and the high-conductivity medium storage tank 1 are connected by using a connecting copper tube 10 with external threads at both ends. The external thread size of the connecting copper tube 10 is M10, the wall thickness is 1mm, and the length is 26mm. The thread lengths at both ends of the connecting copper tube 10 are set to 5mm, one end is set to a positive thread, and the other end is set to a negative thread.

[0051] The bottom of the high-conductive medium storage tank 1 is sealed, which is convenient for storing the high-conductive medium.

[0052] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for preparing a high-temperature superconductor vertical terminal, characterized in that: include: A high conductive medium storage tank, wherein the top of the high conductive medium storage tank is provided with an opening, a side wall of the high conductive medium storage tank near the opening is provided with a threaded through hole, two threaded through holes are arranged at intervals in the horizontal direction, and a first through hole is provided on the side wall of the high conductive medium storage tank near the bottom; A vertical terminal structure, wherein an exhaust hole is provided at the top of the vertical terminal structure, a square hole is provided at the bottom of the vertical terminal structure, a cylindrical through hole is provided inside the vertical terminal structure, the cylindrical through hole communicates with the cylindrical through hole and the square hole, an outer armor of a conductor is inserted into the square hole, a second through hole is provided near the square hole on the side wall of the vertical terminal structure, and the second through hole is connected to the first through hole through a connecting copper tube; The heating and insulation component includes a first heating plate, a second heating plate and a third heating plate, the first heating plate is configured as a C-shaped plate, the second heating plate and the third heating plate are both configured as square plates, a countersunk hole is provided on the side wall of the second heating plate near the top, two countersunk holes are provided corresponding to the threaded through holes, a through groove is provided at the bottom of the second heating plate, the through groove is adapted to the connecting copper tube, the first heating plate and the third heating plate cooperate to wrap the high-conductivity medium storage tank and the vertical terminal structure, and the second heating plate is arranged between the high-conductivity medium storage tank and the vertical terminal structure.

2. The device for preparing a high-temperature superconductor vertical terminal according to claim 1, characterized in that: It also includes a temperature control computer, which is connected to the first heating plate, the second heating plate and the third heating plate through wires.

3. The device for preparing a high-temperature superconductor vertical terminal according to claim 2, characterized in that: Also included is a bolt, which connects the threaded through hole and the countersunk hole.

4. The device for preparing a high-temperature superconductor vertical terminal according to claim 3, characterized in that: The side length of the square hole is greater than the side length of the conductor outer armor, a step limit is set at 10 mm from the bottom end surface of the vertical terminal structure, and the length of the conductor outer armor inserted into the vertical terminal structure is 10 mm.

5. A method for preparing a high-temperature superconductor vertical terminal, according to the device for preparing a high-temperature superconductor vertical terminal according to claim 4, characterized in that: The following steps are involved: Step 1: Connect the vertical terminal structure with the interior of the high-conductivity medium storage tank through a connecting copper pipe; Step 2: Connect the first heating plate, the second heating plate and the third heating plate to the vertical terminal structure and the high-conductivity medium storage tank, and use an external clamp to clamp them to fix them to each other; Step 3: Turn on the temperature control computer to heat the first heating plate, the second heating plate and the third heating plate, so that the vertical terminal structure and the high-conductivity medium storage tank are quickly heated to 10-15°C above the melting point of the high-conductivity medium; Step 4: Insert the conductor outer armor into the square hole at the bottom of the vertical terminal structure. The length of the conductor outer armor inserted into the vertical terminal structure is 10 mm. Step 5: Pour the liquid high-conductive medium with a temperature 10-15°C higher than the melting point of the high-conductive medium into the top opening of the high-conductive medium storage tank, observe the exhaust hole on the top of the vertical terminal structure, and stop pouring the liquid high-conductive medium until the liquid level of the high-conductive medium is flush with the top of the vertical terminal structure; Step 6: Turn off the temperature control computer, stop heating the first heating plate, the second heating plate and the third heating plate, and use the cooling device to reduce the temperature of the first heating plate, the second heating plate and the third heating plate to below the melting point of the high conductive medium.

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