A superconducting magnet external joint welding auxiliary device

Abstract

The application discloses a kind of superconducting magnet outer joint welding auxiliary device, belong to superconducting magnet technical field, comprising: lifting platform, concave base, concave slide, two groups of bending clamp components, elastic component, fastening screw rod, threaded hole;Lifting platform top installs concave base, concave base is in and is provided with concave slide, and concave slide is nested combination installation with two groups of bending clamp components, and each group of bending clamp components is fixed by screw screwing one superconducting tape;Pre-tightening spring is arranged between the side of concave slide and the side of concave base, and concave slide is cooperated to provide tension for superconducting tape;The middle part of the other side of concave base is provided with threaded hole.Fastening screw rod is pre-tightening force after being passed through threaded hole to concave slide.Exert pre-tightening force.The application solves the problem that high-temperature superconducting magnet needs artificial to provide tension in the process of welding and the joint resistance is too large due to the lack of artificial pre-tightening force.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of superconducting magnets, and particularly relates to a superconducting magnet external joint welding auxiliary device. BACKGROUND

[0002] In recent years, the second generation of high-temperature superconducting tapes cannot be produced for a long distance due to the limitations of production technology and production scale. In large superconducting magnets (such as ITER nuclear fusion devices and high-field MRI magnets), the length of the superconducting tape is limited, and the seamless electrical connection between the tapes needs to be achieved through external joints. The performance of the high-temperature superconducting external joint directly affects the overall stability of the magnet system. The high-temperature superconducting external joint is a key technology for realizing the electrical connection of high-temperature superconducting materials (such as YBCO, BSCCO, etc.), and is widely used in superconducting magnets, superconducting cables, superconducting current limiters and other equipment. Its performance directly affects the overall stability, efficiency and reliability of the superconducting system. The superconducting magnet external joint needs to be manually tensioned during welding. The tension provided by the manual operation is often insufficient to allow the superconducting tape and the external joint to fully contact, resulting in excessive joint resistance of the superconducting magnet. In addition, the superconducting tape is easily damaged by external mechanical stress, resulting in reduced fatigue life, critical current density and critical temperature, and weakened interlayer bonding force of the superconducting tape. SUMMARY

[0003] To solve the above technical problems, the application adopts the following technical scheme:

[0004] A superconducting magnet external joint welding auxiliary device, comprising: a lifting platform, a concave base, a concave slide, two groups of bent clamp assemblies, an elastic component, a fastening screw rod and a threaded hole; the concave base is installed above the lifting platform, the concave slide is arranged in the concave base, the concave slide is nested and combined with the two groups of bent clamp assemblies, and each group of bent clamp assemblies is fixed with a superconducting tape by screw tightening; the pre-tightening spring is arranged between one side of the concave slide and one side of the concave base, and the concave slide provides tension to the superconducting tape; the middle of the other side of the concave base is provided with a threaded hole; and the fastening screw rod applies a pre-tightening force to the concave slide after passing through the threaded hole.

[0005] The application has the following beneficial effects:

[0006] The application provides tension to the superconducting magnet tape through the bent clamp assembly, thereby providing tension to the superconducting magnet external joint. The joint resistance generated during welding of the superconducting magnet external joint can be reduced, thereby reducing heat loss, improving magnetic field stability and uniformity, and enhancing the thermal stability of the magnet. Reducing the joint resistance can reduce the refrigeration load and improve the overall efficiency of the system.

[0007] The application can avoid the superconducting tape from being damaged by bending, reduce the influence of various mechanical stresses on the tape, and avoid problems such as fatigue life reduction, critical current density and critical temperature change, and interlayer bonding force weakening of the superconducting tape.

[0008] The special structure that the concave base and the concave slide are embedded with the bending clamp assembly can adjust the distance between the two sets of bending clamp assemblies to adapt to the superconducting magnet assembled by coils of different sizes.

[0009] The lifting platform can vertically adjust the height of the bending clamp assembly to adapt to the superconducting magnet assembled by coils of different heights, so that the device is suitable for welding of the external joints of various superconducting magnets.

[0010] The rotating fastening screw can push the concave slide through the concave base to compress the pre-tightening spring,

[0011] When the bending clamp assembly fixes the superconducting tape, a tensile force is provided for the high-temperature superconducting tape to enable the high-temperature superconducting tape to fully contact the external joint of the superconducting magnet.

[0012] The application is more convenient when welding the magnet external joint, solves the problems of manual provision of tensile force and excessive joint resistance caused by insufficient manual pre-tightening force during the welding process of the high-temperature superconducting magnet, fills the gap of external joint auxiliary welding, and provides guarantee for stable operation of the superconducting magnet. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective view of the superconducting magnet external joint welding auxiliary device of the application, wherein 1 is a lifting platform base, 2 is a lifting platform side rod, 3 is a concave base, 4 is a concave slide, 5 is a bending clamp assembly, and 8 is a threaded hole;

[0014] Figure 2 It is a side view of the superconducting magnet external joint welding auxiliary device of the application, wherein 1 is a lifting platform base, 2 is a lifting platform side rod, 3 is a concave base, 4 is a concave slide, 5 is a bending clamp assembly, and 6 is a pre-tightening spring;

[0015] Figure 3 It is a schematic view of the bending clamp assembly of the superconducting magnet external joint welding auxiliary device of the application, wherein 5 is a bending clamp assembly;

[0016] Figure 4 It is a schematic view of the fastening screw of the superconducting magnet external joint welding auxiliary device of the application, wherein 7 is a fastening screw;

[0017] Figure 5The schematic view of the auxiliary welding strip of the superconducting magnet external joint welding auxiliary device of the present application, wherein 3 is a concave base, 4 is a concave slide, 5 is a bent clamp assembly, 6 is a pre-tightening spring, 7 is a fastening screw, and 9 is a superconducting strip. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0019] The purpose of the present application is to provide a superconducting magnet external joint auxiliary welding structure to solve the problem of insufficient joint resistance due to insufficient welding contact, by providing tension to the superconducting strips on both sides during the welding process to ensure sufficient contact.

[0020] To achieve the above purpose, as shown in Figure 1 , Figure 2 , Figure 5 The superconducting magnet external joint welding auxiliary device of the present application comprises a lifting platform, a concave base 3, a concave slide 4, two groups of bent clamp assemblies 5, an elastic component (i.e. a pre-tightening spring 6), a fastening screw 7, and a threaded hole 8. Each group of bent clamp assemblies 5 is composed of a large clamp block and a small clamp block. The upper half of the large clamp block and the small clamp block are both set as a quarter of a runway type G10 block, and the outer diameter of the small clamp block is the same as the inner diameter of the large clamp block, and the two are assembled in close contact. The concave base 3 is installed above the lifting platform, and the concave slide 4 is set in the concave base 3. The concave slide 4 is nested and combined with the two groups of bent clamp assemblies 5. The bent clamp assemblies 5 are fixed by screwing the superconducting strip 9, and the small clamp block and the large clamp block of the bent clamp assemblies 5 clamp the superconducting strip 9.

[0021] Further, the lifting platform comprises two groups of lifting platform side rods 2 and two lifting platform bases 1 set on the inner sides above and below the two groups of lifting platform side rods 2. Each group of lifting platform side rods 2 comprises two rod members of the same length, which are cross-assembled in the middle and rotationally connected. The front side and the rear side of the lifting platform are respectively provided with sliding grooves on the same side of the two lifting platform bases 1, and sliding rods are respectively set in the two sliding grooves. The sliding rods are fixedly connected with one end of the rod members of the lifting platform side rods 2 or fixed by other means, and the other end of the rod members of the lifting platform side rods 2 is rotationally connected with the lifting platform base 1 on the opposite side. The sliding rods mechanically move in the sliding grooves to adjust the lifting of the concave base 3. The lifting platform of the present application can also adopt other structures as long as it can realize the function of lifting the concave base 3.

[0022] Further, as shown in Figure 3As shown, the upper half of the large or small clamping block of each set of the bending clamp assembly 5 is provided with a bending G10 pressing block, and the lower half is provided with a cuboid protrusion. The cuboid protrusions of the large or small clamping block are of the same size, and the two cuboid protrusions are embedded in and matched with the groove of the concave slide 4 after the large or small clamping block is abutted.

[0023] Further, Figure 5 As shown, one side of the concave slide 4 is provided with two pre-tightening springs, i.e. pre-tightening springs 6, which provide tension to the superconducting tape 9 in cooperation with the concave slide 4. The superconducting tape 9 is clamped by the bending clamp assembly 5 on the concave slide 4. Two sets of the bending clamp assembly 5 are embedded (abutted and assembled) with the large and small clamping blocks of each set, and the superconducting tape 9 is placed between the large and small clamping blocks. The lower half of the large and small clamping blocks of each set of the bending clamp assembly 5 is provided with a threaded hole, and the superconducting tape 9 is clamped by rotating the screw and penetrating the two threaded holes at the same time.

[0024] The concave base 3 is fixed on the lifting platform, the bending clamp assembly 5 and the concave slide 4 are embedded, and the concave slide 4 is located in the concave base 3. One side of each of the two pre-tightening springs 6 is fixed on one side of the concave base 3, and the other side of each of the two pre-tightening springs 6 abuts against one side of the concave slide 4. The other side of the concave slide 4 abuts against the other side of the concave base 3, and the middle of the other side of the concave base 3 is provided with a threaded hole 8. The tightening screw 7 is screwed into the threaded hole 8 to apply a pre-tightening force to the concave slide 4, and the pre-tightening force of the two pre-tightening springs 6 on the superconducting tape 9 fixed on the bending clamp assembly 5 is adjusted. Figure 4 As shown, the tightening screw 7 applies a pre-tightening force to the concave slide 4 after penetrating the threaded hole 8, and the pre-tightening force of the two pre-tightening springs 6 on the superconducting tape 9 fixed on the bending clamp assembly 5 is adjusted. The pre-tightening spring 6 can be one or two, or other numbers such as three to five, and other elastic devices other than springs can also be used.

[0025] Further, the bending clamp assembly 5 is made of G10 material or other suitable materials, and a special bending structure can avoid the generation of micro-cracks, dislocations and other defects caused by mechanical stress of the superconducting tape due to bending, thereby affecting the overall performance of the superconducting tape.

[0026] Further, the lifting platform is 100 mm long, 45 mm wide or other dimensions, and the height is adjustable. The inner diameter of the large and small clamping blocks of the bending clamp assembly 5 is 15 mm and 10 mm respectively, and the thickness is 5 mm. The lower half is a square with a length, width and height of 5 mm or a cuboid with other dimensions. The groove width of the concave base 3 is 30 mm, and the groove width of the concave slide 4 is 5 mm. The pre-tightening spring is 5 mm long, and the tightening screw is 30 mm long. The pre-tightening spring and the tightening screw can be of other lengths, which can be set according to actual needs.

[0027] The lifting platform base 1 and the lifting platform side rod 2 are made of stainless steel, the concave base 3 is made of G10 material, the concave slide 4 is made of G10 material, the pre-tightening spring 6 is made of carbon steel, and the fastening screw 7 is made of stainless steel. The above components can also use other suitable materials. The superconducting tape 9 is a ReBCO second-generation high-temperature superconducting tape, and can also be other high-temperature superconducting tapes.

[0028] Further, as shown in Figure 5 When the superconducting magnet outer joint is welded, the double-pie coil in the superconducting magnet extends one superconducting tape 9, and the outer joint of the superconducting magnet needs two tapes to provide a pre-tightening force, so that the two tapes can be fixed and fully contact the outer joint. The upper half of the large clamp block and the small clamp block of the bending clamp assembly 5 is set as a quarter runway type G10 block, which is responsible for smooth fitting of the superconducting tape 9, avoiding bending. The lower half of the large clamp block and the small clamp block of the bending clamp assembly 5 is set as a cuboid with threaded holes, which is responsible for pressing and fixing the superconducting tape by screws. The lower half of the large clamp block and the small clamp block is embedded with the groove of the concave slide 4, and the distance between the two bending clamp assemblies 5 can be adjusted according to the width of the magnet. The superconducting tape 9 needs to be pre-tightened after being clamped, and the pre-tightening spring 6 is continuously compressed by rotating the fastening screw 7 through the threaded hole 8 in the middle of one side of the concave base 3. The superconducting tape 9 is straightened and tightened so that the outer joint and the superconducting tape 9 are in full contact, avoiding the problem of large joint resistance caused by insufficient contact during welding. The following is a clear and complete description of the technical solutions in the embodiments of the present application. It should be clear that the described embodiments are only part of the examples of the present application, and do not cover all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should be included in the protection scope of the present application.

[0029] It should be noted that in the specification, claims and above-mentioned drawings of the present application, the terms "first", "second" and the like are only used to distinguish similar objects, and are not intended to describe a specific order or sequence. It should be understood that under appropriate circumstances, the data corresponding to these terms can be replaced with each other in order to better describe the embodiments of the present application. In addition, the terms "include", "have" and their various modifications are intended to express a non-exclusive inclusion relationship. For example, a process, method, system, product or device that includes a series of steps or units is not limited to those explicitly listed steps or units, but can also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or devices.

[0030] In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like is determined based on the orientation or positional relationship shown in the drawings. The use of these terms is mainly for a clearer description of the present application and its embodiments, and is not intended to limit the devices, elements or components involved to have a specific orientation, or to be constructed and operated in a specific orientation.

[0031] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned partial terms can also have other meanings. For example, in some cases, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship. For a person of ordinary skill in the art, the specific meaning of these terms in the present application can be understood according to the specific context. At the same time, the terms "mount", "set", "provided with", "connected", "connected", "sleeved", and the like should be understood in a broad sense. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For a person of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

Claims

1. A superconducting magnet external joint welding auxiliary device, characterized in that: include: A lifting platform, a concave base (3), a concave slideway (4), two sets of bent clamp assemblies (5), an elastic component (6), a fastening screw (7), and a threaded hole (8); the concave base (3) is installed above the lifting platform, the concave slideway (4) is arranged in the concave base (3), the concave slideway (4) and the two sets of bent clamp assemblies (5) are nested and assembled, and each set of bent clamp assemblies (5) is screwed to fix a superconducting tape (9); a pre-tightening spring (6) is arranged between one side of the concave slideway (4) and one side of the concave base (3), and cooperates with the concave slideway (4) to provide tensioning force for the superconducting tape (9); a threaded hole (8) is arranged in the middle of the other side of the concave base (3); the fastening screw (7) passes through the threaded hole (8) and applies pre-tightening force to the concave slideway (4); Each set of bending clamp components (5) is composed of a large clamp block and a small clamp block. The upper parts of the large clamp block and the small clamp block are both set as a quarter runway block, and the outer diameter of the small clamp block is the same as the inner diameter of the large clamp block. The two clamp blocks are assembled and clamped to clamp the superconducting tape (9); the lower parts are both set as rectangular convex blocks. The sizes of the rectangular convex blocks of the large clamp block or the small clamp block are the same. After the large clamp block or the small clamp block is abutted, the two rectangular convex blocks are embedded in the groove of the concave slide (4) and match the groove of the concave slide (4).

2. The superconducting magnet external joint welding auxiliary device according to claim 1, characterized in that: The rectangular parallelepiped protrusions on the lower half of the large clamping block and the small clamping block of each set of bent clamp components (5) are provided with threaded holes, and the superconducting tape (9) is clamped by tightening the screws that penetrate the two threaded holes at the same time.

3. The superconducting magnet external joint welding auxiliary device according to claim 1, characterized in that: The lifting platform comprises two groups of lifting platform side rods (2) and two lifting platform bases (1) arranged on the inner sides above and below the two groups of lifting platform side rods (2); wherein each group of lifting platform side rods (2) comprises two rods of the same length, which are cross-assembled in the middle and rotatably connected; sliding grooves are respectively provided on the front side and the rear side of the lifting platform on the same side of the two lifting platform bases (1), and sliding rods are respectively provided in the two sliding grooves, the sliding rods are fixed to one end of the rod of the lifting platform side rod (2) by clamping or fixed in other ways, and the other end of the rod of the lifting platform side rod (2) is rotatably connected to the lifting platform base (1) on the opposite side; the sliding rods mechanically move in the sliding grooves to realize the adjustment of the lifting and lowering of the concave base (3).

4. The superconducting magnet external joint welding auxiliary device according to claim 1, characterized in that: The large clamping block and the small clamping block are both configured as G10 blocks or made of other suitable materials.

5. The superconducting magnet external joint welding auxiliary device according to claim 1, characterized in that: The elastic component (6) is configured as a preloaded spring.

6. The superconducting magnet external joint welding auxiliary device according to claim 5, characterized in that: The concave base (3) is fixed on the lifting platform, and one or two preload springs (6) are provided. One side of the one or two preload springs (6) is respectively fixed to one side of the concave base (3), and the other side abuts against one side of the concave slideway (4). The other side of the concave slideway (4) abuts against the other side of the concave base (3).

7. The superconducting magnet external joint welding auxiliary device according to claim 5, characterized in that: Three to five preload springs (6) are provided, one side of each preload spring (6) is fixed to one side of the concave base (3), and the other side abuts against one side of the concave slideway (4), and the other side of the concave slideway (4) abuts against the other side of the concave base (3).

8. The superconducting magnet external joint welding auxiliary device according to claim 1, characterized in that: The superconducting tape (9) is a second generation ReBCO high temperature superconducting tape.

9. The superconducting magnet external joint welding auxiliary device according to claim 1 or 2, characterized in that: The lower half of the large clamp block and the small clamp block of each set of bending clamp components (5) are cubes or rectangular blocks of other sizes with a length of 5 mm, a width of 5 mm, and a height of 5 mm.

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