A high-voltage and high-current coaxial cable connection method

Abstract

The present application discloses a method for connecting a high-voltage, high-current coaxial cable. In the method, the steps of connecting a high-voltage, high-current coaxial cable connection structure to one end of the coaxial cable include: preparatory work before connection, fixing the copper mesh, and connecting the corrugated tube. The connection structure includes a connector, a copper mesh fixing assembly, and a corrugated tube; the copper mesh fixing assembly includes a butt-joint tube, a tapered sleeve, and an outer sleeve. The tapered sleeve is fitted onto one end of the butt-joint tube, and a tapered space for clamping the copper mesh is formed between the tapered sleeve and the butt-joint tube; one end of the outer sleeve is fitted onto the tapered sleeve, and the inner wall of the outer sleeve and the outer wall of the tapered sleeve are provided with matching tapered surfaces, and the other end of the outer sleeve is provided with a boss that matches the step; the middle part of the butt-joint tube is provided with an external thread that matches the threaded hole, and the other end of the butt-joint tube is provided with a connecting end; the end of the corrugated tube is provided with a connecting portion that is detachably connected to the connecting end. The connection structure of the present application has high strength and high reliability, and can ensure the connection performance of the connection.

Description

Technical Field

[0001] The present application belongs to the technical field of cable connection, and specifically relates to a method for connecting high-voltage and high-current coaxial cables. Background Art

[0002] To increase the pulse power of high-power pulse devices, it is necessary to reduce their loop inductance. Coaxial cables are often used to transmit high pulse currents to the load, with the transmitted pulse currents reaching tens or even hundreds of kiloamperes. In specific applications where shock waves are generated by electric explosions of metal wires, the same type of energy converter must operate deep inside the borehole. Patent number CN201810575812.7, "Large Current Transmission Coaxial Drill Pipe," discloses a segmented coaxial high-current transmission method. Although it has many advantages in its application field, the connection points of the two coaxial cables and the connection structure between the coaxial cables and the coaxial loads have the following problems: the connection structure is not strong enough and has low reliability; the contact resistance of the connection point is large, which leads to uneven current flowing through the connection point and the connection structure. When contact resistance is high, some electrical energy is consumed, reducing the efficiency of power transmission. This lost energy often occurs in the form of sparks, severely damaging the connection performance at the joints and connection structures, and even causing the insulation material to lose its insulating ability. When the current is unevenly distributed around the circumference of the coaxial cable, the electromotive force generated by the current causes the outer conductor to creep, squeezing it in one direction, and thus causing the coaxial cable to lose its coaxiality. Coaxial cable connections often need to move, rotate, or follow coaxial loads, so they need to maintain their flexibility. However, current coaxial cable connections often use structures such as copper wire wrapped around the outer conductor, argon arc welded corrugated copper sheathed outer conductor, or argon arc welded corrugated aluminum tape. These structures not only have low connection reliability but also poor flexibility, making current connection structures difficult to meet usage requirements. Summary of the Invention

[0003] The embodiments of the present application provide a high-voltage and high-current coaxial cable connection method, which solves the problems of low connection strength, high contact resistance at the connection point, poor flexibility and low connection reliability in the connection structure of the coaxial cable in the prior art.

[0004] In a first aspect, an embodiment of the present invention provides a high-voltage and high-current coaxial cable connection structure, comprising a cylindrical connector, a copper mesh fixing assembly, and a corrugated tube;

[0005] One end of the connector is provided with a threaded hole and a through hole with successively decreasing inner diameters, and a step is formed at the connection between the threaded hole and the through hole;

[0006] The copper mesh fixing assembly includes a butt joint tube, a tapered sleeve, and an outer sleeve. The tapered sleeve is sleeved on one end of the butt joint tube, and a tapered space for clamping the copper mesh is formed between the inner wall of the tapered sleeve and the outer wall of the butt joint tube; one end of the outer sleeve is sleeved on the tapered sleeve, and the inner wall of the outer sleeve and the outer wall of the tapered sleeve are provided with matching tapered surfaces, and the other end of the outer sleeve is provided with a boss that matches the step;

[0007] The middle portion of the butt joint pipe is provided with an external thread that matches the threaded hole, and the other end of the butt joint pipe is provided with a connecting end; the end portion of the bellows is provided with a connecting portion that is detachably connected to the connecting end.

[0008] Furthermore, the connecting end is an external thread provided on the end of the butt-jointing pipe;

[0009] The connecting portion 4 includes a connecting ring 41 fixed to the end of the bellows 3, and a fastening ring 42; one end of the fastening ring 42 is provided with an internal thread that cooperates with the external thread at the end of the docking tube 21, and the inner wall of the other end of the fastening ring 42 is provided with a snap ring 421, and the outer wall of one end of the connecting ring 41 extending into the fastening ring 42 is provided with a ring body 411 that cooperates with the snap ring 421.

[0010] Furthermore, the inner wall of the tapered sleeve and the outer wall of the butt joint tube matched with the tapered sleeve are conical surfaces with the same taper;

[0011] The outer wall of the tapered sleeve and the inner wall of the outer sleeve matched with the tapered sleeve are conical surfaces with the same taper.

[0012] Furthermore, the angle between the inner wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 2° to 4°, and the angle between the outer wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 5° to 7°.

[0013] In a second aspect, embodiments of the present invention further provide a method for connecting a high-voltage, high-current coaxial cable, including a method for connecting the above-described connection structure to a coaxial cable, a method for connecting two sections of coaxial cable using the above-described connection structure, and a method for connecting a coaxial cable to a coaxial load using the above-described connection structure.

[0014] A method for connecting the connecting structure to a coaxial cable comprises the following steps:

[0015] Preparations before connection: Cut one end of the coaxial cable and the copper mesh covering the coaxial cable to the desired length; then pass the cable end through the connector, butt joint, and corrugated tube in sequence;

[0016] Fixing the copper mesh: evenly place the ends of the copper mesh in the tapered space formed between the inner wall of the tapered sleeve and the outer wall of the docking tube; insert one end of the docking tube into the threaded hole of the connector, and then rotate the docking tube so that the external thread in the middle of the tube is screwed into the threaded hole; at this time, one end of the outer sleeve abuts against the step, and the other end of the outer sleeve pushes the tapered sleeve toward the end away from the connector, so that the movement directions of the tapered sleeve and the docking tube are opposite, thereby firmly fixing the copper mesh between the tapered sleeve and the docking tube;

[0017] Connection of the bellows: Connect the connecting end of the butt-joint pipe to one end of the bellows through the connecting portion;

[0018] A method for connecting two sections of coaxial cables using the connection structure specifically comprises the following steps:

[0019] Connecting a high-voltage and high-current coaxial cable connection structure to one end of the first coaxial cable;

[0020] Connecting the end of the second coaxial cable to the end of the first coaxial cable extending out of the corrugated tube;

[0021] Secure the copper mesh outside the second section of coaxial cable through another high-voltage and high-current coaxial cable connection structure:

[0022] Connecting the butt joint tube at the end of the second coaxial cable segment to the corrugated tube at the end of the first coaxial cable segment through a connecting portion;

[0023] A method for connecting two sections of coaxial cables using the connection structure specifically comprises the following steps:

[0024] Connecting the high-voltage and high-current coaxial cable connection structure to one end of the coaxial cable;

[0025] Connecting one end of the coaxial cable extending out of the corrugated tube to a coaxial load cable;

[0026] The end of the bellows close to the coaxial load is connected to the end of the coaxial load through the connecting portion.

[0027] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0028] An embodiment of the present invention provides a high-voltage, high-current coaxial cable connection structure. The connection structure can change the width of the conical space along the radial direction of the conical sleeve by changing the position of the conical sleeve in the axial direction of the butt joint. Therefore, when the copper mesh is placed in the conical space, the copper mesh can be tightened by reducing the width of the conical space along the radial direction of the conical sleeve. The copper mesh fixing assembly can improve the reliability of the copper mesh connection, make it evenly connected to the butt joint, ensure uniform current distribution, reduce the contact resistance at the connection, ensure power transmission efficiency, and avoid damage to the insulation layer of the coaxial cable. The corrugated tube is placed at the connection of the two sections of coaxial cable so that the lateral force caused by the coaxial cable when moving, rotating, and moving with the coaxial load does not affect the reliability of the connection. The connection structure of the present invention has high strength and high reliability, can ensure the connection performance of the connection, and meet the use requirements of the coaxial cable.

[0029] An embodiment of the present invention also provides a high-voltage, high-current coaxial cable connection method, in which a copper mesh fixing assembly fixes the copper mesh, enabling the ends of the copper mesh to be firmly and evenly clamped without affecting the use function of the copper mesh, reducing contact resistance, and facilitating disassembly, thereby meeting the connection requirements of the coaxial cable; the end of the corrugated tube is connected to the copper mesh on the coaxial cable through a metal component, thereby ensuring the flexibility of the connection while also ensuring that the connection between the two sections of the coaxial cable has a shielding layer, and then when a large current passes through the coaxial cable, the magnetic field generated by the coaxial cable can be effectively shielded inside the coaxial cable, and when the core wire of the coaxial cable is damaged, the leaked current can be conducted out through the corrugated tube; the corrugated tube is flexible, and after the corrugated tube is connected, it can protect the coaxial cable connection and eliminate the lateral stress between the load and the electrical connection, thereby avoiding the problem of lateral extrusion and deformation of the outer conductor copper mesh caused by lateral stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a high-voltage, high-current coaxial cable connection structure provided by an embodiment of the present invention.

[0032] Figure 2 A schematic diagram of the connection between the connector and the copper mesh fixing assembly provided in an embodiment of the present invention.

[0033] Figure 3 A schematic diagram of the connection between the bellows and the connecting portion provided in an embodiment of the present invention.

[0034] Figure 4A schematic structural diagram of a connector provided in an embodiment of the present invention.

[0035] Figure 5 A structural diagram of a butt joint provided in an embodiment of the present invention.

[0036] Figure 6 A schematic structural diagram of a tapered sleeve provided in an embodiment of the present invention.

[0037] Figure 7 A schematic structural diagram of an outer sleeve provided in an embodiment of the present invention.

[0038] Figure 8 A schematic diagram of the structure of connecting two sections of high-voltage and high-current coaxial cables provided by an embodiment of the present invention.

[0039] Figure 9 A schematic structural diagram of the connection between a high-voltage, high-current coaxial cable and a coaxial load provided by an embodiment of the present invention.

[0040] Figure markings: 1-connector; 11-threaded hole; 12-through hole; 13-step; 2-copper mesh fixing assembly; 21-butting tube; 211-connecting end; 22-conical sleeve; 23-outer sleeve; 231-boss; 24-conical space; 3-bellows; 4-connecting part; 41-connecting ring; 411-ring body; 42-fastening ring; 421-clamping ring; 5-coaxial cable; 6-copper mesh; 7-coaxial load. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] like Figures 1 to 9 As shown, the high-voltage and high-current coaxial cable connection structure provided by the embodiment of the present invention includes a cylindrical connector 1, a copper mesh fixing component 2, and a corrugated tube 3;

[0043] One end of the connector 1 is provided with a threaded hole 11 and a through hole 12 with successively decreasing inner diameters, and a step 13 is formed at the connection between the threaded hole 11 and the through hole 12 .

[0044] The copper mesh fixing assembly 2 includes a butt joint tube 21, a conical sleeve 22, and an outer sleeve 23. The conical sleeve 22 is mounted on one end of the butt joint tube 21, and a conical space 24 for clamping the copper mesh 6 is formed between the inner wall of the conical sleeve 22 and the outer wall of the butt joint tube 21; one end of the outer sleeve 23 is mounted on the conical sleeve 22, and the inner wall of the outer sleeve 23 and the outer wall of the conical sleeve 22 are provided with matching conical surfaces, and the other end of the outer sleeve 23 is provided with a boss 231 that cooperates with the step 13.

[0045] An external thread matching the threaded hole 11 is provided in the middle of the butt-joint pipe 21 , and a connecting end 211 is provided at the other end of the butt-joint pipe 21 ; a connecting portion 4 detachably connected to the connecting end 211 is provided at the end of the bellows 3 .

[0046] It should be noted that if Figure 4 As shown, a through hole section can be provided between the threaded hole 11 and the through hole 12 . The aperture of the through hole section is between the threaded hole 11 and the through hole 12 . The provision of the through hole section facilitates cooperation with the boss 231 on the outer wall of the outer sleeve 23 .

[0047] like Figure 2 As shown, a conical space 24 is formed between the inner wall of the conical sleeve 22 and the outer wall of the butt joint tube 21. This conical space 24 is formed by the conical inner wall of the conical sleeve 22 and the conical outer wall of the butt joint tube 21. By changing the axial position of the conical sleeve 22 relative to the butt joint tube 21, the radial width of the conical space 24 can be varied. Therefore, when the copper mesh 6 is placed within the conical space 24, the width of the conical space 24 along the radial direction of the conical sleeve 22 can be reduced to secure the copper mesh 6. The copper mesh fixing assembly 2 improves the reliability of the connection of the copper mesh 6, ensuring uniform connection to the butt joint tube 21, ensuring uniform current distribution, reducing contact resistance at the connection, ensuring efficient power transmission, and preventing damage to the insulation layer of the coaxial cable 5.

[0048] The inner wall of the outer sleeve 23 and the outer wall of the tapered sleeve 22 are provided with matching tapered surfaces, so that the tapered sleeve 22 can be moved toward the side of the butt joint 21 by moving the outer sleeve 23, thereby reducing the radial width of the tapered space 24 along the tapered sleeve 22.

[0049] The above-mentioned conical surfaces are all formed by the outer diameter shrinking outward, thereby facilitating the assembly and disassembly of the butt-joint pipe 21, the conical sleeve 22, and the outer sleeve 23.

[0050] like Figure 7 As shown, the boss 231 of this embodiment is a step arranged on the outer wall of the outer sleeve 23. After the boss 231 on the outer wall of the outer sleeve 23 abuts against the step 13 in the connector 1, when the docking tube 21 is screwed into the connector 1, the outer sleeve 23 can remain stationary, and the tapered sleeve 22 moves toward the direction of the connector 1, thereby reducing the radial width of the tapered space 24 along the tapered sleeve 22 to achieve the tightening of the copper mesh 6.

[0051] like Figure 3 and Figure 8 As shown, the corrugated tube 3 is sleeved on the connection between two sections of coaxial cables 5 so that the lateral force caused by the coaxial cables 5 when they move, rotate, or move with the coaxial load 7 does not affect the reliability of the connection.

[0052] The connection structure of the present invention has high strength and high reliability, can ensure the connection performance of the connection point, and meet the use requirements of the coaxial cable 5.

[0053] In this embodiment, Figure 5 As shown, the connecting end 211 is an external thread provided at the end of the butt-joint pipe 21;

[0054] like Figure 3 As shown, the connecting part 4 includes a connecting ring 41 fixed to the end of the bellows 3, and a fastening ring 42; one end of the fastening ring 42 is provided with an internal thread that cooperates with the external thread at the end of the docking tube 21, and the inner wall of the other end of the fastening ring 42 is provided with a snap ring 421, and the outer wall of one end of the connecting ring 41 extending into the fastening ring 42 is provided with a ring body 411 that cooperates with the snap ring 421.

[0055] It should be noted that the butt joint 21, conical sleeve 22, connecting ring 41, bellows 3, and fastening ring 42 of the present invention are all made of metal materials, thereby ensuring the reliability of the connection between the two sections of copper mesh 6 and achieving the shielding function of the connection.

[0056] After the end of the connecting ring 41 away from the ring body 411 is passed through the fastening ring 42, the end of the connecting ring 41 away from the ring body 411 is welded to the bellows 3 using argon arc welding, thereby completing the assembly of the connecting portion 4 and the bellows 3. When installing the bellows 3, the internal thread at the end of the fastening ring 42 can securely fix the bellows 3 to the end of the butt joint 21, or the bellows 3 can be fixed to one end of the coaxial load 7.

[0057] like Figure 2 As shown, the inner wall of the conical sleeve 22 of this embodiment and the outer wall of the butt tube 21 and the conical sleeve 22 are conical surfaces with the same taper; thereby, the inner and outer side surfaces of the copper mesh 6 can be firmly clamped, avoiding the problem that only a part of the copper mesh 6 can be clamped due to different tapers.

[0058] The outer wall of the conical sleeve 22 and the inner wall of the outer sleeve 23 and the conical sleeve 22 are conical surfaces with the same taper, so that the outer sleeve 23 can evenly apply force to the conical sleeve 22, thereby improving the reliability of the copper mesh 6 when fastened.

[0059] like Figure 6As shown, in this embodiment, the included angle between the inner wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 3°, and the included angle between the outer wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 6°.

[0060] It should be noted that, after many tests, the angle of 3° between the inner wall of the conical sleeve 22 and the axis of the conical sleeve 22 can well fasten the copper mesh 6 and easily fit the copper mesh 6 onto the conical sleeve 22 .

[0061] The angle between the outer wall of the conical sleeve 22 and the axis of the conical sleeve 22 is 6°, which enables the conical sleeve 22 and the outer sleeve 23 to move relatively a small distance to tighten the copper mesh 6.

[0062] like Figures 1 to 9 As shown, a method for connecting a high-voltage and high-current coaxial cable includes a method for connecting the above-mentioned connection structure to a coaxial cable, a method for connecting two sections of coaxial cable using the above-mentioned connection structure, and a method for connecting the coaxial cable to a coaxial load using the above-mentioned connection structure;

[0063] A method for connecting a connecting structure to a coaxial cable, comprising the following steps:

[0064] Preparations before connection: Cut one end of the coaxial cable 5 and the copper mesh 6 wrapped around the coaxial cable 5 to a set length; then pass the end of the coaxial cable 5 through the connector 1, the butt joint 21, and the corrugated tube 3 in sequence.

[0065] After cutting the coaxial cable 5 , pass the coaxial cable 5 and the insulation layer thereon through the connector 1 , the butt joint 21 , and the corrugated tube 3 ; and cut the copper mesh 6 according to the position of the connector 1 so that the end of the copper mesh 6 can be smoothly placed in the tapered space 24 .

[0066] Fixing of the copper mesh: Place the ends of the copper mesh 6 evenly in the conical space 24 formed between the inner wall of the tapered sleeve 22 and the outer wall of the docking tube 21; insert one end of the docking tube 21 into the threaded hole 11 of the connector 1, and then rotate the docking tube 21 so that the external thread in the middle part is screwed into the threaded hole 11; at this time, one end of the outer sleeve 23 abuts against the step 13, and the other end of the outer sleeve 23 pushes the tapered sleeve 22 toward the end away from the connector 1, so that the movement directions of the tapered sleeve 22 and the docking tube 21 are opposite, thereby firmly fixing the copper mesh 6 between the tapered sleeve 22 and the docking tube 21.

[0067] Fixing the copper mesh 6 by the copper mesh fixing component 2 can securely and evenly clamp the ends of the copper mesh 6 without affecting the use function of the copper mesh 6, reduce contact resistance, and facilitate disassembly, thereby meeting the connection requirements of the coaxial cable 5.

[0068] Connection of the bellows: Connect the connecting end 211 of the butt tube 21 to one end of the bellows 3 through the connecting portion 4; the bellows 3 is flexible. After the bellows 3 is connected, it can protect the coaxial cable 5 and eliminate the lateral stress between the load and the electrical connection, avoiding the problem of lateral extrusion and deformation of the outer conductor copper mesh 6 caused by the lateral stress.

[0069] A method for connecting two sections of coaxial cables using a connecting structure, comprising the following steps:

[0070] Connect a high-voltage, high-current coaxial cable connection structure to one end of the first coaxial cable 5; this operation step is the same as the above-mentioned step of connecting the high-voltage, high-current coaxial cable connection structure to one end of the coaxial cable 5.

[0071] The end of the second coaxial cable 5 is connected to the end of the first coaxial cable 5 extending out of the corrugated tube 3; after the two ends of the cable are connected, the connection of the cable transmission part is completed.

[0072] Fix the copper mesh 6 outside the second section of coaxial cable 5 through another high-voltage and high-current coaxial cable connection structure: the operation steps are the same as the steps for fixing the copper mesh 6 mentioned above.

[0073] Connect the butt joint 21 at the end of the second coaxial cable 5 to the corrugated tube 3 at the end of the first coaxial cable 5 through the connecting portion 4; thereby completing the connection of the two high-voltage and high-current coaxial cables 5. Figure 8 shown.

[0074] The two ends of the bellows 3 are connected to the copper mesh 6 on the two sections of coaxial cables 5 through metal parts, thereby ensuring the flexibility of the connection while also ensuring that the connection between the two sections of coaxial cables 5 has a shielding layer. When a large current passes through the coaxial cable 5, the magnetic field generated by the coaxial cable 5 can be effectively shielded inside the coaxial cable 5, and when the core wire of the coaxial cable 5 is damaged, the leaked current can be discharged through the bellows 3.

[0075] A method for connecting a coaxial cable to a coaxial load using the above-mentioned connection structure specifically comprises the following steps:

[0076] Connect the high-voltage and high-current coaxial cable connection structure to one end of the coaxial cable 5;

[0077] Connect one end of the coaxial cable 5 extending out of the corrugated tube 3 to the cable of the coaxial load 7; after connection, test whether the cable is in a continuity state.

[0078] Connect the end of the corrugated tube 3 close to the coaxial load 7 to the end of the coaxial load 7 through the connecting portion 4, thereby completing the connection between the high-voltage and high-current coaxial cable 5 and the coaxial load 7. Figure 9 The corrugated tube 3 makes the connection between the coaxial cable 5 and the coaxial load 7 flexible and has a shielding function.

[0079] In this embodiment, the connection of the bellows specifically includes the following steps:

[0080] The internally threaded end of the fastening ring 42 is screwed into the external thread at the end of the butt joint 21. One side of the ring body 411 abuts the end face of the butt joint 21, while the other side of the ring body 411 abuts one side of the clamping ring 421. This connection method is simple, reliable, and easy to disassemble. Furthermore, the connection between the bellows 3 and the butt joint 21 is made of rigid metal, which further reduces contact resistance.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for connecting high-voltage and high-current coaxial cables, characterized in that: The invention includes a method for connecting a high-voltage and high-current coaxial cable connection structure to a coaxial cable, a method for connecting two sections of coaxial cable using the high-voltage and high-current coaxial cable connection structure, and a method for connecting a coaxial cable to a coaxial load using the high-voltage and high-current coaxial cable connection structure. The high-voltage and high-current coaxial cable connection structure comprises a cylindrical connector (1), a copper mesh fixing assembly (2), and a corrugated tube (3); one end of the connector (1) is provided with a threaded hole (11) and a through hole (12) with successively decreasing inner diameters, and a step (13) is formed at the connection between the threaded hole (11) and the through hole (12); the copper mesh fixing assembly (2) comprises a butt joint (21), a conical sleeve (22), and an outer sleeve (23), the conical sleeve (22) is sleeved on one end of the butt joint (21), and the inner diameter of the conical sleeve (22) is reduced. A conical space (24) for clamping the copper mesh (6) is formed between the wall and the outer wall of the butt-joint tube (21); one end of the outer sleeve (23) is sleeved on the conical sleeve (22), the inner wall of the outer sleeve (23) and the outer wall of the conical sleeve (22) are provided with matching conical surfaces, and the other end of the outer sleeve (23) is provided with a boss (231) that matches the step (13); the middle part of the butt-joint tube (21) is provided with an external thread that matches the threaded hole (11), and the other end of the butt-joint tube (21) is provided with a connecting end (211); the bellows ( 3) The end portion is provided with a connecting portion (4) which is detachably connected to the connecting end (211); the connecting end (211) is an external thread provided on the end portion of the butt joint (21); the connecting portion (4) includes a connecting ring (41) fixed to the end portion of the bellows (3), and a fastening ring (42); one end of the fastening ring (42) is provided with an internal thread which matches the external thread of the end portion of the butt joint (21), and the inner wall of the other end of the fastening ring (42) is provided with a clamping ring (421), and the connecting ring (41) extends into the end portion of the fastening ring (42). The outer wall is provided with a ring body (411) that cooperates with the clamping ring (421); the inner wall of the tapered sleeve (22) and the outer wall of the butt pipe (21) that cooperates with the tapered sleeve (22) are tapered surfaces with the same taper; the outer wall of the tapered sleeve (22) and the inner wall of the outer sleeve (23) that cooperates with the tapered sleeve (22) are tapered surfaces with the same taper; the angle between the inner wall of the tapered sleeve (22) and the axis of the tapered sleeve (22) is 2° to 4°, and the angle between the outer wall of the tapered sleeve (22) and the axis of the tapered sleeve (22) is 5° to 7°; A method for connecting the high-voltage and high-current coaxial cable connection structure to a coaxial cable specifically comprises the following steps: Preparation work before connection: cutting one end of the coaxial cable (5) and the copper mesh (6) outside the coaxial cable (5) to a set length; then passing the end of the coaxial cable (5) through the connector (1), the butt joint (21), and the corrugated tube (3) in sequence; Fixing of the copper mesh: the end of the copper mesh (6) is evenly placed in the conical space (24) formed between the inner wall of the conical sleeve (22) and the outer wall of the butt joint tube (21); one end of the butt joint tube (21) is inserted into the threaded hole (11) of the connector (1), and then the butt joint tube (21) is rotated so that the external thread in the middle thereof is screwed into the threaded hole (11); at this time, one end of the outer sleeve (23) abuts against the step (13), and the other end of the outer sleeve (23) pushes the conical sleeve (22) toward the end away from the connector (1), so that the movement directions of the conical sleeve (22) and the butt joint tube (21) are opposite, thereby firmly fixing the copper mesh (6) between the conical sleeve (22) and the butt joint tube (21); Connection of the bellows: connecting the connection end (211) of the butt-joint pipe (21) to one end of the bellows (3) through the connection portion (4); A method for connecting two sections of coaxial cables using the high-voltage and high-current coaxial cable connection structure specifically comprises the following steps: Connecting a high-voltage, high-current coaxial cable connection structure to one end of the first coaxial cable (5); Connecting the end of the second coaxial cable (5) to the end of the first coaxial cable (5) extending out of the corrugated tube (3); Fix the copper mesh (6) outside the second coaxial cable (5) through another high-voltage and high-current coaxial cable connection structure: Connecting the butt joint (21) at the end of the second coaxial cable (5) to the corrugated tube (3) at the end of the first coaxial cable (5) via a connecting portion (4); A method for connecting a coaxial cable to a coaxial load using the high-voltage and high-current coaxial cable connection structure specifically comprises the following steps: Connecting the high-voltage and high-current coaxial cable connection structure to one end of the coaxial cable (5); Connecting one end of the coaxial cable (5) extending out of the corrugated tube (3) to the cable of the coaxial load (7); One end of the bellows (3) close to the coaxial load (7) is connected to the end of the coaxial load (7) through a connecting portion (4).

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