Cable intermediate connection part

Abstract

To provide a cable intermediate connection part capable of ensuring a predetermined insulation performance even if a compression length of a conductor connection pipe is shortened by improving a heat dissipation property from a conductor connection part to an insulation unit.SOLUTION: A cable intermediate connection part is a prefabrication type cable intermediate connection part comprising an insulation unit including an internal electrode and a cable terminal part in which cable conductors of two power cables are connected with each other by a conductor connection part and stored in the insulation unit. The conductor connection part includes: a conductor connection pipe to which the cable conductor is compression-connected; an intermediate sleeve which extends so as to cover a compressed portion of the conductor connection pipe and is electrically and mechanically connected with a non-compressed portion of the conductor connection pipe; and a polyhedral contactor which is disposed on an outer peripheral surface of the intermediate sleeve. The cable conductor and the internal electrode are mechanically connected via the conductor connection pipe and the polyhedral contactor.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a cable intermediate connection part for connecting power cables to each other.

Background Art

[0002] Conventionally, as a cable intermediate connection part for connecting two power cables (for example, CV cables), a prefabricated type cable intermediate connection part (also called a prefab joint) is known in which the cable conductors of the two power cables are connected by a conductor connection pipe to form a conductor connection part, and this conductor connection part is inserted into an insulating unit and assembled (see, for example, Patent Document 1).

[0003] In a prefabricated type cable intermediate connection part, the cable conductor of the power cable is inserted into the conductor connection pipe and connected, for example, by compression. Also, a ring-shaped connection part (hereinafter referred to as a "conductor ring") is attached to a non-compressed part substantially at the center in the axial direction (longitudinal direction) of the conductor connection pipe, and the internal electrode of the insulating unit and the conductor connection pipe are electrically and mechanically connected via the conductor ring.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in order to shorten the length of the insulating unit, it is preferable that the compression length of the conductor connection pipe is short. However, when the compression length of the conductor connection pipe is shortened, the contact resistance between the conductor connection pipe and the cable conductor increases, so that the heat generation during energization increases. This heat generation is transmitted to the internal electrode of the insulating unit via the conductor ring, but when the amount of heat generation is larger than the amount of heat dissipation due to heat transfer, the cable insulator is likely to soften and deform, and there is a risk of significantly impairing the stability of the insulation performance of the cable intermediate connection part.

[0006] An object of the present disclosure is to provide an intermediate cable connection part that can enhance the heat dissipation performance from a conductor connection part to an insulating unit and ensure a predetermined insulation performance even when the compression length of a conductor connection tube is shortened.

Means for Solving the Problems

[0007] The intermediate cable connection part according to the present disclosure is an insulating unit having an internal electrode, a cable terminal part in which cable conductors of two power cables are connected to each other by a conductor connection part and housed in the insulating unit, and is a prefabricated intermediate cable connection part including the conductor connection part includes a conductor connection tube to which the cable conductor is compression-connected, an intermediate sleeve that extends to cover a compressed part of the conductor connection tube and is electrically and mechanically connected to a non-compressed part of the conductor connection tube, and a multi-face contact arranged on an outer peripheral surface of the intermediate sleeve. The cable conductor and the internal electrode are mechanically connected via the conductor connection tube, the intermediate sleeve, and the multi-face contact.

Effects of the Invention

[0008] According to the present disclosure, it is possible to provide an intermediate cable connection part that can enhance the heat dissipation performance from a conductor connection part to an insulating unit and ensure a predetermined insulation performance even when the compression length of a conductor connection tube is shortened.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] FIG. 1 is a one-sided cross-sectional view showing a cable intermediate connection part 1 according to an embodiment of the present disclosure. In FIG. 1, hatching is applied only to the cross-section of the components of the insulating unit 10.

[0012] As shown in FIG. 1, the cable intermediate connection part 1 includes an insulating unit 10 and a cable terminal part 50. The cable intermediate connection part 1 is a prefabricated type cable intermediate connection part that connects two power cables 51A and 51B.

[0013] In the following description, in the cable terminal part 50, the side inserted into the insulating unit 10 of each of the power cables 51A and 51B is referred to as the "tip side", and the opposite side is referred to as the "rear end side". That is, in the cable intermediate connection part 1, the central side of the cable intermediate connection part 1 is referred to as the "tip side", and both end sides are referred to as the "rear end side".

[0014] As shown in FIG. 1, the cable terminal part 50 is configured by attaching connection components including a conductor connection part 52, a stress cone 53, a compression device 54, and a cable protection fitting 55 to the tip parts of the power cables 51A and 51B, respectively.

[0015] The power cables 51A and 51B are, for example, extra-high voltage (e.g., 345 kV class) power cables insulated with rubber or plastic. The power cables 51A and 51B each have, in order from the inside, a cable conductor 511, an internal semiconductive layer (reference numeral omitted), a cable insulator 512, a cable external semiconductive layer 513, a cable shielding layer (reference numeral omitted), and a cable sheath (reference numeral omitted), etc. In the cable terminal part 50, each layer is exposed by step-stripping a predetermined length from the tip parts of the power cables 51A and 51B.

[0016] The cable conductors 511, 511 are connected by a conductor connection part 52. The cable conductors 511, 511 are electrically connected to the internal electrode 11 of the insulation unit 10 via the conductor connection part 52. The specific configuration of the conductor connection part 52 will be described later.

[0017] The stress cone 53 is formed in a spindle shape and has an insulating part (reference numeral omitted) on the tip side and a conductive part (reference numeral omitted) on the rear end side. The insulating part is formed in a tubular shape from an insulating rubber material such as EP rubber, for example, and the conductive part is formed in a tubular shape from a semiconductive rubber material such as semiconductive EP rubber, for example. The insulating part and the conductive part are integrally formed by mold molding.

[0018] The rear end part (conductive part) of the stress cone 53 is connected to the cable outer semiconductive layer 513 of the power cables 51A, 51B. "Connected to the cable outer semiconductive layer 513 of the power cables 51A, 51B" includes both the case of being directly connected to the cable outer semiconductive layer 513 and the case of being connected via an externally regenerated semiconductive layer formed with a mold or conductive paint at the end of the cable outer semiconductive layer 513 as long as it has a predetermined performance as a cable intermediate connection part. The tip part (insulating part) of the stress cone 53 has a shape corresponding to the cable housing part of the insulation unit 10. A compression device 54 and a cable protection fitting 55 are attached to the rear end side of the stress cone 53.

[0019] The compression device 54 includes, for example, a push pipe 541 that abuts against the stress cone 53, a coil spring 542 that biases the push pipe 541 toward the stress cone 53, a push fitting 543 that holds the push pipe 541 and the coil spring 542, a shaft 544 that is attached to the rear end side of the push fitting 543 and inserted into the coil spring 542, a washer 545 that penetrates the rear end side of the shaft 544 and is fixed with a nut, and holds the coil spring 542 with the front end face and the rear end face of the push fitting 543, and a tension bolt 546 whose rear end side penetrates the washer 545 and whose front end side is bolted to the insulation unit 10 side.

[0020] As shown in FIG. 1, the insulating unit 10 includes an internal electrode 11, a reinforcing insulator 12, a shielding portion 13, a protective tube 14, and the like. The internal electrode 11 and the reinforcing insulator 12 are integrally formed by, for example, mold molding.

[0021] The internal electrode 11 is formed of a conductive material suitable for energization, such as copper, aluminum, a copper alloy, or an aluminum alloy. The internal electrode 11 is electrically connected to the cable conductor 511 via the conductor connection portion 52.

[0022] A concave fitting groove 111 is provided along the circumferential direction at a predetermined position (for example, substantially in the center in the axial direction) on the inner peripheral surface of the internal electrode 11. Further, on the inner peripheral surface of the internal electrode 11, insertion grooves (not shown) for communicating the fitting groove 111 with the internal space corresponding to the large-diameter portion of the intermediate sleeve 62 in the internal electrode 11 are provided at two positions in the circumferential direction so as to extend from the fitting groove 111 toward the rear end side (right side in FIG. 2).

[0023] The reinforcing insulator 12 is formed of, for example, a hard plastic resin material having high mechanical strength (for example, epoxy resin or FRP). The reinforcing insulator 12 has a substantially cylindrical shape, and a cable terminal accommodating portion (not shown) is formed by the inner peripheral surface. The internal electrode 11 is disposed substantially at the center in the axial direction of the cable terminal accommodating portion.

[0024] The shielding portion 13 is formed on the outer peripheral surface of the reinforcing insulator 12, for example, by applying a conductive paint. The shielding portion 13 may be further formed by winding a semiconductive tape or a copper mesh tape (shielding mesh) around the surface of the conductive paint application layer.

[0025] The shielding portion 13 is electrically connected to the protective tube 14 and grounded. By providing the shielding portion 13, the internal electric field of the reinforcing insulator 12 is made uniform without electric field concentration between the internal electrode 11 and the shielding portion 13, and the electrical characteristics are stabilized.

[0026] The protective tube 14 is a metal member having a substantially cylindrical shape. The protective tube 14 is formed of a metal material such as, for example, copper, brass, or aluminum. The protective tube 14 is disposed so as to cover the outer peripheral surface of the reinforcing insulator 12.

[0027] FIG. 2 is a partial cross-sectional view showing the conductor connection portion 52 of the cable intermediate connection portion 1. FIGS. 3A and 3B are an external perspective view and a perspective cross-sectional view showing the conductor connection portion 52.

[0028] As shown in FIG. 2 and the like, in the present embodiment, the conductor connection portion 52 includes a conductor connection tube 61, an intermediate sleeve 62, and a multi-surface contact 63.

[0029] The conductor connection tube 61 is formed of a conductive material suitable for conduction, such as, for example, copper, aluminum, a copper alloy, or an aluminum alloy. The conductor connection tube 61 has a cylindrical shape, and cable conductor accommodating portions 613 are formed on both sides in the axial direction.

[0030] The conductor connection tube 61 and the cable conductors 511, 511 are electrically and mechanically connected to each other by inserting the cable conductors 511, 511 into the cable conductor accommodating portions 613 of the conductor connection tube 61 and then compressing them using a compression jig such as a compression die. In the conductor connection tube 61, the portion to be compressed (the portion where the cable conductor accommodating portion 613 is formed) is referred to as a "compression portion 611", and the substantially central portion in the axial direction sandwiched by the compression portions 611 is referred to as a "non-compression portion 612".

[0031] The intermediate sleeve 62 is formed of a conductive material suitable for conduction, such as, for example, copper, aluminum, a copper alloy, or an aluminum alloy, in the same manner as the conductor connection tube 61. The intermediate sleeve 62 has a cylindrical shape that covers the outer peripheral surface of the conductor connection tube 61. The intermediate sleeve 62 extends so as to cover, for example, the portion from the non-compression portion 612 of the conductor connection tube 61 to the compression portions 611 on both sides. The intermediate sleeve 62 is electrically and mechanically connected to the non-compression portion 612 of the conductor connection tube 61.

[0032] Note that the intermediate sleeve 62 does not have to cover the entire compression part 611, and it may have a length sufficient to accommodate the multi-faceted contact 63.

[0033] The intermediate sleeve 62 has a contact element receiving groove 621 on its outer peripheral surface for arranging the multi-faceted contact 63. In the present embodiment, four contact element receiving grooves 621 are formed on the outer peripheral surface of the intermediate sleeve 62.

[0034] The intermediate sleeve 62 may be composed of a plurality of members divided in the circumferential direction. In the present embodiment, the intermediate sleeve 62 is composed of a first intermediate sleeve 62A and a second intermediate sleeve 62B that are divided into two parts in the circumferential direction (a so-called half-split structure).

[0035] In addition, the diameter of one side (the right side in the drawing) in the axial direction of the intermediate sleeve 62 is formed to be larger than the diameter of the other side (the left side in the drawing). A guide 66 indicating the circumferential position of a bolt 64 described later is provided on the end face on the large-diameter side of the intermediate sleeve 62. The guide 66 is provided in a groove shape, for example, from the radially inner side to the outer side, at a position corresponding to the bolt 64. In the present embodiment, the guides 66 are arranged in a straight line at a total of two locations, one on the first intermediate sleeve 62A and one on the second intermediate sleeve 62B.

[0036] The first intermediate sleeve 62A and the second intermediate sleeve 62B are each fixed to the outer peripheral surface of the conductor connection pipe 61. In the present embodiment, the first intermediate sleeve 62A and the second intermediate sleeve 62B are fixed to the non-compression part 612 using bolts 64 and 67. In the present embodiment, the bolts 64 are provided at two locations in the circumferential direction at approximately the center in the axial direction of the intermediate sleeve 62 (one location on the first intermediate sleeve 62A and one location on the second intermediate sleeve 62B). Further, the bolts 67 are provided at four locations (two locations on the first intermediate sleeve 62A and two locations on the second intermediate sleeve 62B) spaced apart from the bolts 64 in the same circumferential direction in the intermediate sleeve 62. The abutting surfaces of the first intermediate sleeve 62A and the second intermediate sleeve 62B may be connected to each other, for example, by bolt fastening.

[0037] The multi - surface contactor 63, like the conductor connection pipe 61 and the intermediate sleeve 62, is formed of a conductive material suitable for energization, such as copper, aluminum, copper alloy, or aluminum alloy. The multi - surface contactor 63 is disposed on the outer peripheral surface of the intermediate sleeve 62 and is electrically and mechanically connected to the intermediate sleeve 62.

[0038] The multi - surface contactor 63 has, for example, a ring shape that fits into the contactor accommodation groove 621 of the intermediate sleeve 62. On the outer peripheral surface of the intermediate sleeve 62, the contact area between the multi - surface contactor 63 and the internal electrode 11 can be increased as compared with the case where the multi - surface contactors 63 are scattered in the circumferential direction.

[0039] The multi - surface contactor 63 may be composed of a plurality of members divided in the circumferential direction. In this case, the multi - surface contactor 63 can be easily attached to the outer peripheral surface of the intermediate sleeve 62.

[0040] In the present embodiment, the multi - surface contactor 63 is composed of a first multi - surface contactor 63A and a second multi - surface contactor 63B that are divided into two in the circumferential direction, similar to the intermediate sleeve 62. The first multi - surface contactor 63A and the second multi - surface contactor 63B are connected to each other and exhibit a ring shape as a whole. Note that the first multi - surface contactor 63A and the second multi - surface contactor 63B may not be connected to each other and may be directly fixed to the outer peripheral surface of the intermediate sleeve 62, respectively.

[0041] The multi - surface contactor 63 may be disposed at a plurality of positions in the axial direction of the outer peripheral surface of the intermediate sleeve 62. In the present embodiment, the multi - surface contactor 63 is disposed in four contactor accommodation grooves 621 provided on the outer peripheral surface of the intermediate sleeve 62. By arranging a plurality of multi - surface contactors 63 in the axial direction, the degree of freedom in design for increasing the contact area between the multi - surface contactor 63 and the internal electrode 11 is increased.

[0042] The multi-surface contact element 63 is composed of, for example, a multi-laminate band of a multi-surface contact type in which V-shaped spring pieces are arranged in the circumferential direction. For the multi-surface contact element 63, for example, "La-CUT / 0.25 / 0 (product number)" manufactured by Multi-Contact can be applied.

[0043] Note that the configuration of the multi-surface contact element 63 described above is an example, and other configurations can also be applied. For example, for the multi-surface contact element 63, a coil spring formed by bending a conductive wire while spirally winding it and connecting both ends of the wire to form a ring shape can be applied.

[0044] A heat conduction layer 65 may be interposed at the interface of the connection portion between the conductor connection pipe 61 and the intermediate sleeve 62. The heat conduction layer 65 is formed of, for example, a heat conductive material (TIM: Thermal Interface Material) having a high heat conductivity of 0.8 to 6.5 W / (m·K). As the thermally conductive material, for example, heat dissipation silicone or a material in which a heat conduction filler is blended with a base resin such as silicone can be applied. Depending on the surface roughness of the conductor connection pipe 61 or the intermediate sleeve 62, voids may be formed at the interface of the connection portion between the two. However, by interposing the heat conduction layer 65, the heat conduction layer 65 fills the voids generated between the conductor connection pipe 61 and the intermediate sleeve 62 when there is no heat conduction layer 65, thereby enhancing the heat dissipation performance.

[0045] In the assembly process of the cable intermediate connection portion 1, after the tip portions of the power cables 51A and 51B are step-stripped, the cable protection fitting 55, the compression device 54, and the stress cone 53 are inserted into the power cables 51A and 51B. Also, the insulating unit 10 is inserted into one of the power cables 51A (it may also be the power cable 51B). In this state, the cable conductors 511 and 511 of the power cables 51A and 51B are inserted into the cable conductor housing portion 613 of the conductor connection pipe 61, and the conductor connection pipe 61 is compression-connected.

[0046] Next, an intermediate sleeve 62 is attached to the outer peripheral surface of the conductor connection pipe 61, and a multi-surface contact 63 is attached to the outer peripheral surface of the intermediate sleeve 62. When the intermediate sleeve 62 and the multi-surface contact 63 are each composed of a plurality of members, after the conductor connection pipe 61 is compression-connected to the cable conductors 511, 511, the intermediate sleeve 62 and the multi-surface contact 63 can be easily attached.

[0047] In the case of this embodiment, the intermediate sleeve 62 and the conductor connection pipe 61 are fixed by a bolt 67 with a predetermined torque such that the head of the bolt 67 does not protrude from the outer surface of the intermediate sleeve 62. That is, a groove for accommodating the head of the bolt 67 is provided on the intermediate sleeve 62 side. Further, the bolt 64 is provided such that its head protrudes radially outward from the outer surface of the intermediate sleeve 62. The protruding head of this bolt 64 becomes a protrusion of the intermediate sleeve 62.

[0048] Next, the insulating unit 10 and the cable terminal portion 50 are relatively moved in the axial direction so as to be positioned such that the internal electrode 11 of the insulating unit 10 and the multi-surface contact 63 of the cable terminal portion 50 are electrically and mechanically connected. At this time, since a guide 66 indicating the circumferential position of the bolt 64 (protrusion) is provided on the large-diameter side end surface of the intermediate sleeve 62, it can be assembled while visually aligning the guide 66 with the position of an insertion groove (not shown) on the internal electrode 11 side.

[0049] The insulating unit 10 and the cable terminal portion 50 are relatively moved in the axial direction such that the protrusion of the head of the bolt 64 is disposed at a position corresponding to the fitting groove 111 through the insertion groove of the internal electrode 11. Thereafter, by rotating the insulating unit 10 by about 90 degrees, the head of the bolt 64 can be fitted into the fitting groove 111 of the internal electrode 11. The multi-surface contact 63 intervenes between the internal electrode 11 and the intermediate sleeve 62, and the internal electrode 11 of the insulating unit 10 and the multi-surface contact 63 of the cable terminal portion 50 are positioned so as to be electrically and mechanically connected. Further, since the head of the bolt 64 is fitted into the fitting groove 111 of the internal electrode 11, axial movement of the cable terminal portion 50 can be prevented.

[0050] Then, while moving the stress cone 53 toward the insulation unit 10 side and subsequently moving the compression device 54 toward the stress cone 53 side, the coil spring 542 is compressed to press the tip of the stress cone 53 against the inner surface of the reinforcing insulator 12, and the compression device 54 is fixed in a predetermined state.

[0051] Also, the cable protection fitting 55 is bolted to the insulation unit 10, and an anticorrosion layer 56 for waterproofing is formed at the rear end of the cable protection fitting 55. Thus, the cable intermediate connection part 1 can be assembled with relatively simple work.

[0052] When energization is performed in the cable intermediate connection part 1, heat generation occurs at the contact part between the cable conductor 511 and the conductor connection pipe 61. This heat generation is transmitted to the internal electrode 11 of the insulation unit 10 via the intermediate sleeve 62 and the multi - surface contactor 63 mechanically connected to the conductor connection pipe 61. Compared with a conventional cable intermediate connection part using a conductor ring, since the cross - sectional area in the heat transfer path is large and the thermal resistance is small, the heat generated at the contact part between the cable conductor 511 and the conductor connection pipe 61 is efficiently released.

[0053] Thus, the cable intermediate connection part 1 according to the embodiment has the following characteristic features alone or in appropriate combination.

[0054] That is, the cable intermediate connection part 1 is a pre - hub type cable intermediate connection part including an insulation unit 10 having an internal electrode 11, and a cable terminal part 50 in which the cable conductors 511 of two power cables 51A and 51B are connected to each other by a conductor connection part 52 and housed in the insulation unit 10. The conductor connection part 52 has a conductor connection pipe 61 to which the cable conductor 511 is compression - connected, an intermediate sleeve 62 that extends to cover the compression part 611 of the conductor connection pipe 61 and is electrically and mechanically connected to the non - compression part 612 of the conductor connection pipe 61, and a multi - surface contactor 63 disposed on the outer peripheral surface of the intermediate sleeve 62. The cable conductor 511 and the internal electrode 11 are mechanically connected via the conductor connection pipe 61, the intermediate sleeve 62, and the multi - surface contactor 63.

[0055] According to the cable intermediate connection part 1, the heat dissipation property from the conductor connection part 52 to the insulating unit 10 can be enhanced, and the heat generated at the contact part between the cable conductor 511 and the conductor connection pipe 61 can be efficiently released. Therefore, even if the compression part 611 of the conductor connection pipe 61 is shortened and the amount of heat generation increases, the thermal deformation of the cable insulator 512 can be suppressed, and a predetermined insulation performance can be ensured. Thus, the cable intermediate connection part 1 can be miniaturized.

[0056] In the cable intermediate connection part 1, the multi-faceted contactor 63 has a ring shape fitted on the outer peripheral surface of the intermediate sleeve 62. Thereby, the contact area between the multi-faceted contactor 63 and the internal electrode 11 can be maximized, and the heat dissipation property to the insulating unit 10 can be further enhanced.

[0057] In the cable intermediate connection part 1, the multi-faceted contactor 63 is arranged at a plurality of positions in the axial direction of the outer peripheral surface of the intermediate sleeve 62. Thereby, the contact area between the multi-faceted contactor 63 and the internal electrode 11 can be easily enlarged, and the heat dissipation property to the insulating unit can be further enhanced.

[0058] In the cable intermediate connection part 1, the multi-faceted contactor 63 is a multi-laminate band. Thereby, by using a commercially available multi-laminate band, the cable intermediate connection part 1 can be easily realized.

[0059] In the cable intermediate connection part 1, the intermediate sleeve 62 is composed of a plurality of members divided in the circumferential direction. Thereby, after the conductor connection pipes 61 are compression-connected to the cable conductors 511, 511, they can be easily attached.

[0060] In the cable intermediate connection part 1, a heat conduction layer 65 made of a heat conductive material is interposed between the intermediate sleeve 62 and the non-compression part 612 of the conductor connection pipe 61. Thereby, the voids that may be formed at the interface of the connection part between the conductor connection pipe 61 and the intermediate sleeve 62 can be filled with the heat conduction layer 65, and the heat dissipation property can be further enhanced.

[0061] As described above, the invention made by the present inventor has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments and can be modified without departing from the gist thereof.

[0062] In this embodiment, the guide 66 of the intermediate sleeve 62 is provided in a groove shape. However, as long as the guide 66 has the role of guiding during assembly, it does not have to be in a groove shape. For example, it may be formed like a marking.

[0063] Also, in this embodiment, the protrusion of the intermediate sleeve 62 for fitting the intermediate sleeve 62 and the internal electrode 11 is formed by the head of the bolt 64. However, the form of the protrusion is not limited.

[0064] It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Explanation of Reference Numerals

[0065] 1 Cable intermediate connection part 10 Insulation unit 11 Internal electrode 12 Reinforcing insulator 13 Shielding part 14 Protection tube 50 Cable terminal part 51A, 51B Power cable 511 Cable conductor 52 Conductor connection part 61 Conductor connection tube 62 Intermediate sleeve 63 Multi-surface contact 65 Heat conduction layer

Claims

1. An insulating unit having internal electrodes, A cable terminal part in which the cable conductors of two power cables are connected by a conductor connection part and accommodated in the insulating unit, A prefabricated cable intermediate connection part comprising: The conductor connection part includes: A conductor connection pipe to which the cable conductor is compression-connected, An intermediate sleeve that extends to cover the compression part of the conductor connection pipe and is electrically and mechanically connected to the non-compression part of the conductor connection pipe, A multi-faceted contact arranged on the outer peripheral surface of the intermediate sleeve, and The cable conductor and the internal electrode are mechanically connected via the conductor connection pipe, the intermediate sleeve, and the multi-faceted contact, Cable intermediate connection part.

2. The multi-faceted contact has a ring shape fitted onto the outer peripheral surface of the intermediate sleeve, The cable intermediate connection part according to Claim 1.

3. The multi-faceted contacts are arranged at a plurality of positions in the axial direction of the outer peripheral surface of the intermediate sleeve, The cable intermediate connection part according to Claim 2.

4. The multi-faceted contact is a multi-layer band, The cable intermediate connection part according to Claim 1 or 2.

5. The intermediate sleeve is composed of a plurality of circumferentially divided members, The cable intermediate connection part according to Claim 1 or 2.

6. A heat conduction layer made of a heat conductive material is interposed between the intermediate sleeve and the non-compression part of the conductor connection pipe, The cable intermediate connection part according to Claim 1 or 2.

7. Protrusions are provided on the outer peripheral surface of the intermediate sleeve to fit into fitting grooves provided on the inner peripheral surface of the internal electrode, The cable intermediate connection part according to Claim 1.

8. Guides are provided at positions corresponding to the protrusions on the end face of the intermediate sleeve, The cable intermediate connection part according to Claim 7.

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