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CN-122000763-A - Joint connection structure of superconducting cable for star-like superconducting magnet

CN122000763ACN 122000763 ACN122000763 ACN 122000763ACN-122000763-A

Abstract

The invention discloses a joint connection structure of a superconducting cable for a star-like superconducting magnet, which relates to the technical field of superconducting cable joint connection and comprises a clamp system, wherein the clamp system is used for clamping a connecting end of a superconducting cable, the clamp system is provided with a first clamping plate and a second clamping plate, a plurality of fixing structures are arranged between the first clamping plate and the second clamping plate and are at least used for connecting the first clamping plate and the second clamping plate together and fixing the current distance between the first clamping plate and the second clamping plate, and a first fixing rod is arranged in the fixing structures. As long as the first clamping plate and the second clamping plate are ensured to be stably abutted to the outside of the connecting end of the superconducting cable and continuously provide extrusion force, the problem of poor contact or virtual connection between the clamp system and the connecting end of the superconducting cable at low temperature can be avoided, the contact resistance between the clamp system and the connecting end of the superconducting cable can be reduced, and the problem of large heating value of the connecting part is avoided.

Inventors

  • YAN CHAOHUI
  • JIANG KUI
  • ZHU YINGSONG
  • WANG DONGHU
  • XIA BING

Assignees

  • 合肥曦合超导科技有限公司

Dates

Publication Date
20260508
Application Date
20260309

Claims (10)

  1. 1. The utility model provides a joint connection structure of superconducting cable for star ware superconducting magnet, its characterized in that includes anchor clamps system (1), anchor clamps system (1) are used for carrying out the centre gripping to link (2) of superconducting cable, anchor clamps system (1) have first splint (11) and second splint (12), be provided with a plurality of fixed knot structure (3) between first splint (11) and second splint (12), a plurality of fixed knot structure (3) are used for linking together first splint (11) and second splint (12) at least to the current interval of fixed first splint (11) and second splint (12) has first dead lever (31) in fixed knot structure (3), and the linear expansion coefficient of first dead lever (31) is greater than link (2) of superconducting cable, and first splint (11) adopt conductive material to make.
  2. 2. The joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 1, wherein the material of the first fixing rod (31) comprises at least one or more of aluminum, polyimide, iron-nickel alloy and polyetheretherketone.
  3. 3. A joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 1, characterized in that the fixing structure (3) comprises one or two second fixing rods (32), the second fixing rods (32) are used for being connected with the first clamping plates (11)/the second clamping plates (12), and one ends of the second fixing rods (32) are connected with the first fixing rods (31).
  4. 4. A joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 3, wherein the first fixing rod (31) and the second fixing rod (32) are detachably connected.
  5. 5. The joint connection structure of superconducting cable for star-like superconducting magnet according to claim 1, wherein the fixing structure (3) comprises a balance rod group (33) and a second fixing rod (32), the balance rod group (33), the second fixing rod (32) and the first fixing rod (31) are correspondingly axially connected, the balance rod group (33) is communicated with an external fluid pipeline (34), an electromagnetic valve is arranged on the fluid pipeline (34), and the other end of the fluid pipeline (34) is communicated with a container filled with fluid through a corresponding fluid pump.
  6. 6. The joint connection structure of superconducting cable for star-like superconducting magnet according to claim 5, wherein a chamber is provided in the balance bar group (33), the chamber is communicated with the corresponding fluid pipeline (34), an inner bar is slidably provided in the chamber, and one end of the inner bar is connected with the corresponding second fixing bar (32)/first fixing bar (31).
  7. 7. The joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 5, wherein the balance bar group (33), the second fixing bar (32) and the first fixing bar (31) are all detachably connected.
  8. 8. The joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 1, wherein the first clamping plate (11) and the second clamping plate (12) are made of at least copper material.
  9. 9. The joint connection structure of superconducting cable for star-like superconducting magnet according to claim 1, wherein the upper middle parts of the first clamping plate (11) and the second clamping plate (12) are provided with positioning parts (4) extending along the length direction, and the middle parts of the positioning parts (4) are provided with depressions.
  10. 10. The joint connection structure of superconducting cable for a star-like superconducting magnet according to claim 1, wherein the shape of the connection end (2) of the superconducting cable is one of a circle, a square and a spiral.

Description

Joint connection structure of superconducting cable for star-like superconducting magnet Technical Field The invention relates to the technical field of superconducting cable joint connection, in particular to a joint connection structure of a superconducting cable for a star simulator superconducting magnet. Background The star simulator superconducting cable is a key current carrying component for restraining high-temperature plasma, is formed by twisting superconducting cable strands, is sleeved with a stainless steel tube, and is filled with liquid nitrogen or liquid helium or cold helium gas to realize that the superconducting cable is cooled below a critical temperature. Can stably transmit large current under strong magnetic field and ultralow temperature. The size (outer diameter) of the star-like superconducting cable is large, cold shrinkage is generated at low temperature, the deformation amount is large during the cold shrinkage, for the superconducting cable with the same size, the outer armor or the sheath is needed to be removed before the electrode is connected, then the conductive sleeve for protection is welded on the outer side, one end with the conductive sleeve is pressed between two clamps for fixing, in order to ensure the tight connection between the conductive sleeve and the clamps, an indium sheet or a flexible conductive material is usually paved between the conductive sleeve and the clamps, the connection tightness between the conductive sleeve and the clamps is further improved, and the condition that the resistance of a connecting end is increased due to virtual connection is avoided; However, since the superconducting cable and the connector are required to be placed in a low-temperature environment for use, the environment temperature can reach 4.2 kelvin or below 77K, which can lead to cold shrinkage of the structure, gaps can be generated between the conductive sleeve and the clamp, and since the superconducting cable connector in the same size can be different in thickness of the removed armor and tolerance of the externally connected conductive sleeve, even if the superconducting cable connector in the same size is connected with a matched press-fitting clamp, insufficient content of paved indium sheets or flexible conductive materials can be generated at low temperature, poor contact can be caused, resistance can be increased, and the problem of large heating value at the connector can occur. Disclosure of Invention The invention aims to solve the problem that the existing joint connection structure of the superconducting cable cannot adapt to poor contact between a joint and the superconducting cable at low temperature caused by different thicknesses of removed armor, different tolerances of conductive sleeves and the like. In order to solve the problems, the invention provides a joint connection structure of a superconducting cable for a star-like superconducting magnet, which comprises a clamp system, wherein the clamp system is used for clamping a connecting end of the superconducting cable, the clamp system is provided with a first clamping plate and a second clamping plate, a plurality of fixing structures are arranged between the first clamping plate and the second clamping plate and are at least used for connecting the first clamping plate and the second clamping plate together and fixing the current distance between the first clamping plate and the second clamping plate, a first fixing rod is arranged in the fixing structures, the linear expansion coefficient of the first fixing rod is larger than that of the connecting end of the superconducting cable, and the first clamping plate is made of conductive materials. Compared with the prior art, the joint connection structure of the superconducting cable for the star-like superconducting magnet has the following beneficial effects: As long as the first clamping plate and the second clamping plate are ensured to be stably abutted to the outside of the connecting end of the superconducting cable and continuously provide extrusion force, the problem of poor contact or virtual connection between the clamp system and the connecting end of the superconducting cable at low temperature can be avoided, the contact resistance between the clamp system and the connecting end of the superconducting cable can be reduced, and the problem of large heating value of the connecting part is avoided. As a further scheme of the invention, the material for manufacturing the first fixing rod at least comprises one or more of aluminum, polyimide, iron-nickel alloy and polyether-ether-ketone. As a further proposal of the invention, the fixing structure comprises one or two second fixing rods, the second fixing rods are used for being connected with the first clamping plate/the second clamping plate, and one ends of the second fixing rods are connected with the first fixing rods. As a further scheme of the invention, the first fixing rod and