Cable joint assembly

Abstract

The present disclosure relates to a cable joint assembly, comprising: a connecting conductor configured to have a tubular shape and adapted to connect two cable conductors, wherein the connecting conductor is provided with a first opening recessed inwardly from an outer wall thereof; and a shielding cover configured to have a tubular shape surrounding the connecting conductor, wherein the shielding cover is provided with a second opening penetrating through the wall thickness of the shielding cover and aligned with the first opening, such that the shielding cover is electrically connected to the connecting conductor through a connecting member passing through the second opening and extending into the first opening. In the cable joint assembly of the present disclosure, the reliable electrical connection between the shielding cover and the connecting conductor can be ensured through a simple operation, thereby avoiding risk of internal discharge due to creation of a potential difference.

Description

CABLE JOINT ASSEMBLYRELATED FIELD

[0001] The present disclosure relates to the technical field of cable fittings, in particular to a cable joint assembly.BACKGROUND

[0002] In the field of power transmission, a cable joint is a commonly used cable fitting for connecting two cable sections, for example, by a connecting conductor crimped at the ends of cable conductors. Some cable joint products comprise a metal shielding cover used to shield electric field for voltage equalization. Generally, in order to ensure the installation and reliable operation of the shielding cover, it is necessary to design shielding covers of different specifications for cables with different cross-sectional dimensions.

[0003] In the prior art, a shielding cover is connected to a connecting conductor, for example, by a tin-plated copper wire having a cross-sectional dimension of about 2.5 mm2, and the tin-plated copper wire is fixed to the shielding cover and the connecting conductor, for example, by riveting or screwing. However, when an outer rubber body is installed and rotated, the tin-plated copper wire is easily broken, resulting in failure of the connection between the shielding cover and the connecting conductor. The connection failure creates a potential difference between the cable conductor and the shielding cover, which results in an internal discharge and ultimately leads to failure of the cable joint product.SUMMARY

[0004] It is an object of the present disclosure to provide a cable joint assembly to overcome at least one of the defects of the prior art. More specifically, in the cable joint assembly according to the present disclosure, the reliable electrical connection between the shielding cover and the connecting conductor can be ensured through a simple operation, thereby avoiding risk of internal discharge due to creation of a potential difference.

[0005] To this end, the present disclosure provides a cable joint assembly, comprising: a1P240204CN01connecting conductor configured to have a tubular shape and adapted to connect two cable conductors, wherein the connecting conductor is provided with a first opening recessed inwardly from an outer wall thereof; and a shielding cover configured to have a tubular shape surrounding the connecting conductor, wherein the shielding cover is provided with a second opening penetrating through the wall thickness of the shielding cover and aligned with the first opening, such that the shielding cover is electrically connected to the connecting conductor through a connecting member passing through the second opening and extending into the first opening.

[0006] According to the above technical concept, the present disclosure may further include any one or more of the following alternatives.

[0007] In some alternatives, the connecting member is a bolt, and the first opening is provided with an inside thread.

[0008] In some alternatives, the connecting conductor is provided with two first openings opposite to each other in the radial direction thereof, and the shielding cover comprises a first half portion and a second half portion fixedly connected to each other, each of the first half portion and the second half portion being provided with one second opening aligned with the corresponding first opening.

[0009] In some alternatives, the connecting conductor comprises an annular blocking portion protruding from an inner wall of the connecting conductor at a middle position of the connecting conductor along the axial direction thereof, and the first opening is provided at the middle position of the connecting conductor along the axial direction thereof.

[0010] In some alternatives, the shielding cover comprises an annular protrusion protruding from an inner wall of the shielding cover at a middle position of the shielding cover along the axial direction thereof, and the second opening penetrates through the protrusion.

[0011] In some alternatives, the protrusion abuts against the outer wall of the connecting conductor.

[0012] In some alternatives, an inner diameter of the protrusion is equal to an outer diameter of the connecting conductor.2P240204CN01

[0013] In some alternatives, the second opening is a stepped opening.

[0014] In some alternatives, an outer diameter of the shielding cover is configured to be equal to an outer diameter of a cable insulation layer surrounding each of the cable conductors.

[0015] In some alternatives, a cross-sectional area of the connecting conductor is not less than a cross-sectional area of each of the cable conductors.

[0016] Compared with the prior art, the cable joint assembly according to the present disclosure has a plurality of beneficial technical effects, especially: compared with a copper wire with small sectional dimension in the prior art, the present disclosure adopts an electrical connector such as a bolt to directly connect the shielding cover with the connecting conductor crimped at the ends of cable conductors, thus the overall structure of such mode is simple and reliable, the operation is easy, and it is suitable for various types of cable joint products, and can ensure sufficient mechanical strength and contact area, such that the problem of potential difference between the shielding cover and the connecting conductor is effectively solved, and the risk of internal discharge is avoided.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features and advantages of the present disclosure will be readily understood through the following preferred embodiments described in detail with reference to the accompanying drawings, in which a same reference numeral indicates a same or similar component.

[0018] FIG. 1A is a perspective view of a shielding cover of a cable joint assembly provided according to an embodiment of the present disclosure.

[0019] FIG. IB is a cross-sectional view of the shielding cover.

[0020] FIG. 1C is a side view of the shielding cover.

[0021] FIG. 2A is a perspective view of a connecting conductor of the cable joint assembly.

[0022] FIG. 2B is a cross-sectional view of the connecting conductor.

[0023] FIG. 3 is a cross-sectional view of the cable joint assembly in use.3P240204CN01

[0024] The components shown in the drawings are depicted for simplicity and clarity, and are not necessarily drawn to precise scale. It is conceivable that the drawings are not only used to explain the present disclosure, but also help to define the present disclosure when necessary.DETAILED DESCRIPTION

[0025] The implementation and usage of the specific embodiments are discussed in detail below. However, it is conceivable that the specific embodiments discussed herein are merely intended to illustrate specific ways of implementing and using the present disclosure, and are not intended to limit the protection scope of the present disclosure.

[0026] In the present description, unless otherwise explicitly specified and defined, “axial” and “radial” are both understood as the axial and radial directions of the substantially cylindrical tubular connecting conductor and shielding cover.

[0027] A preferred embodiment of the cable joint assembly according to the present disclosure is described below with reference to the drawings. As shown, the cable joint assembly according to the present disclosure comprises a shielding cover 100 (see FIGs.1 A-1C) and a connecting conductor 200 (see FIGs. 2A and 2B).

[0028] As shown in FIGs. 2A, 2B and FIG. 3, the connecting conductor 200 is configured as a substantially cylindrical tube having an outer diameter D4 and an inner diameter D5. That is, a tubular body 210 of the connecting conductor 200 is defined by an outer wall 211 and an inner wall 212 of the connecting conductor 200, wherein the diameter of the outer wall 211 of the connecting conductor 200 is D4 and the diameter of its inner wall 212 is D5. In addition, the connecting conductor 200 further comprises an annular blocking portion 220 protruding from the inner wall 212 of the connecting conductor 200 at the middle position of the connecting conductor 200 along the axial direction thereof, such that the left side of the blocking portion 220 and the inner wall 212 of the connecting conductor 200 define a first receiving portion 230 for insertion of an end portion 311 of a conductor 310 of a first cable 300, and the right side of the blocking portion 220 and the inner wall 212 of the connecting conductor 200 define a second receiving portion 240 for insertion of an end portion 411 of a conductor 410 of a second cable 400. It is conceivable that the diameter of the inner wall 4P240204CN01221 of the blocking portion 220 is smaller than the diameter of the conductor 310 of the first cable 300 and the diameter of the conductor 410 of the second cable 400, such that after the conductor 310 of the first cable 300 and the conductor 410 of the second cable 400 are respectively inserted into the first receiving portion 230 and the second receiving portion 240, both of them can be blocked by the blocking portion 220 and thus be accurately limited in position. Then, the connecting conductor 200 is crimped respectively on the end portion 311 of the conductor 310 of the first cable 300 and the end portion 411 of the conductor 410 of the second cable 400 on both sides of the blocking portion 220 by a crimping tool, such that the conductor 310 of the first cable 300 and the conductor 410 of the second cable 400 form an electrical connection with each other through the connecting conductor 200. In addition, it is conceivable that the cross-sectional area of each axial position of the connecting conductor 200 is generally set to be not less than the cross-sectional area of the conductor 310 of the first cable 300 and the cross-sectional area of the conductor 410 of the second cable 400 to ensure the current-carrying performance of the connecting conductor 200.

[0029] According to the present disclosure, the connecting conductor 200 is provided with a first opening 250 recessed inwardly from the outer wall 211 thereof, for example, in the radial direction, for insertion of a connecting member 600, and the first opening 250 is, for example, provided at the middle position of the connecting conductor 200 along the axial direction thereof, that is, radially aligned with the blocking portion 220. The connecting member 600 is, for example, a bolt for fixing the connecting conductor 200 to the external shielding cover 100 and forming an electrical connection, and the first opening 250 is provided with an inside thread mated with the bolt. It is conceivable that due to the arrangement of the blocking portion 220, the first opening 250 can be ensured to have a sufficient depth to increase the contact area between the connecting member 600 and the connecting conductor 200. In the illustrated embodiment, particularly as shown in FIG. 2B, the connecting conductor 200 is preferably provided with two first openings 250 opposite to each other in the radial direction thereof.

[0030] As shown in FIGs. 1A-1C and FIG. 3, the shielding cover 100 is configured as a substantially cylindrical tube having an outer diameter DI and an inner diameter D2 and surrounding the connecting conductor 200. That is, a tubular body 110 of the shielding cover 5P240204CN01100 is defined by an outer wall 111 and an inner wall 112 of the shielding cover 100, wherein the diameter of the outer wall 111 of the shielding cover 100 is DI and the diameter of its inner wall 112 is D2. It is conceivable that, as shown in FIG. 3, the outer diameter DI of the shielding cover 100 is set to be substantially equal to the outer diameter of an insulation layer 320 of the first cable 300 surrounding the conductor 310 thereof and the outer diameter of an insulation layer 420 of the second cable 400 surrounding the conductor 410 thereof, so as to mount and rotate an outer rubber body 500 at the position of the cable joint. In the illustrated embodiment, the shielding cover 100 comprises substantially semi-cylindrical first and second half portions 100a, 100b having the same shape and dimension, which are fixedly connected to each other to form a substantially cylindrical tubular structure. In addition, the shielding cover 100 further comprises an annular protrusion 120 protruding from the inner wall 112 of the shielding cover 100 at the middle position of the shielding cover 100 along the axial direction thereof, such that the left side of the protrusion 120 and the inner wall 112 of the shielding cover 100 define a first through portion 130 through which the left half portion of the connecting conductor 200 passes, and the right side of the protrusion 120 and the inner wall 112 of the shielding cover 100 define a second through portion 140 through which the right half portion of the connecting conductor 200 passes, and the first through portion 130 and the second through portion 140 communicate with each other through a central hole of the protrusion 120. It is conceivable that the inner diameter D3 of the protrusion 120 is not smaller than the outer diameter D4 of the connecting conductor 200, such that the connecting conductor 200 can pass through the central hole of the protrusion 120, and the protrusion 120 is aligned with the blocking portion 220 of the connecting conductor 200 in the radial direction of the shielding cover 100 and the connecting conductor 200. Preferably, the inner diameter D3 of the protrusion 120 is substantially equal to the outer diameter D4 of the connecting conductor 200.

[0031] According to the present disclosure, the shielding cover 100 is provided with a second opening 150 penetrating through the wall thickness of the shielding cover 100, and the second opening 150 is, for example, provided at the middle position of the shielding cover 100 in the axial direction thereof to penetrate through the protrusion 120 and be aligned with the first opening 250 on the connecting conductor 200, such that the shielding cover 100 can be electrically connected to the connecting conductor 200 through the 6P240204CN01connecting member 600 penetrating through the second opening 150 and extending into the first opening 250. In the illustrated embodiment, the first half portion 100a and the second half portion 100b of the shielding cover 100 are each provided with one second opening 150, and the two second openings 150 are opposite to each other in the radial direction of the shielding cover 100 and are respectively aligned with the two corresponding first openings 250 on the connecting conductor 200. In the case where the connecting member 600 is a bolt, the second opening 150 is optionally provided with an inside thread mated with the bolt, and the second opening 150 is preferably a stepped opening, such that when the bolt is tightened, the head of the bolt is tightened and abuts against a stepped surface 151, thus the inner wall 121 of the protrusion 120 can tightly abut against the outer wall 211 of the connecting conductor 200.

[0032] Thus, in the cable joint assembly, the abutment between the inner wall 121 of the protrusion 120 and the outer wall 211 of the connecting conductor 200, as well as the connection member 600, ensure reliable mechanical and electrical connection between the shielding cover 100 and the connecting conductor 200 (without the risk of copper wire breakage in the prior art), thus the problem of potential difference between the shielding cover 100 and the connecting conductor 200 can be effectively solved by a simple operation (for example, tightening a bolt by a simple tool), and the risk of internal discharge is avoided. The solution of the present disclosure has undergone installation testing, and electrical performance tests have been conducted on the entire product after installation, proving that the solution meets the specified requirements. Further, the thickness and other dimensional parameters of the connecting conductor 200 and the shielding cover 100 may be determined according to the different types of cables to be connected. In other words, the design concept of the present disclosure may be compatible with various types of cables, as long as the thickness and other dimensional parameters of the connecting conductor 200 and the shielding cover 100 are correspondingly determined according to the type of the cables, and sufficient contact area between the shielding cover 100 and the connecting conductor 200 is ensured.

[0033] The technical contents and features of the present disclosure have been disclosed above. However, it is conceivable that those skilled in the art can make various changes and improvements to the above-disclosed conception under the creative concept of the present 7P240204CN01disclosure, and all these various changes and improvements fall within the protection scope of the present disclosure.

[0034] The description of the above embodiments is exemplary rather than limitative, and the protection scope of the present disclosure is defined by the appended claims.8P240204CN01

Claims

CLAIMS1. A cable joint assembly, comprising:a connecting conductor (200) configured to have a tubular shape and adapted to connect two cable conductors (310, 410), wherein the connecting conductor (200) is provided with a first opening (250) recessed inwardly from an outer wall (211) thereof; anda shielding cover (100) configured to have a tubular shape surrounding the connecting conductor (200), wherein the shielding cover (100) is provided with a second opening (150) penetrating through the wall thickness of the shielding cover (100) and aligned with the first opening (250), such that the shielding cover (100) is electrically connected to the connecting conductor (200) through a connecting member (600) passing through the second opening (150) and extending into the first opening (250).

2. The cable joint assembly according to claim 1, wherein the connecting member (600) is a bolt, and wherein the first opening (250) is provided with an inside thread.

3. The cable joint assembly according to claim 1, wherein the connecting conductor (200) is provided with two first openings (250) opposite to each other in the radial direction thereof, and wherein the shielding cover (100) comprises a first half portion (100a) and a second half portion (100b) fixedly connected to each other, each of the first half portion (100a) and the second half portion (100b) being provided with one second opening (150) aligned with the corresponding first opening (250).

4. The cable joint assembly according to any one of claims 1 to 3, wherein the connecting conductor (200) comprises an annular blocking portion (220) protruding from an inner wall (212) of the connecting conductor (200) at a middle position of the connecting conductor (200) along the axial direction thereof, and wherein the first opening (250) is provided at the middle position of the connecting conductor (200) along the axial direction thereof.9P240204CN015. The cable joint assembly according to any one of claims 1 to 3, wherein the shielding cover (100) comprises an annular protrusion (120) protruding from an inner wall (112) of the shielding cover (100) at a middle position of the shielding cover (100) along the axial direction thereof, and wherein the second opening (150) penetrates through the protrusion (120).

6. The cable joint assembly according to claim 5, wherein the protrusion (120) abuts against the outer wall (211) of the connecting conductor (200).

7. The cable joint assembly according to claim 5, wherein an inner diameter of the protrusion (120) is equal to an outer diameter of the connecting conductor (200).

8. The cable joint assembly according to claim 5, wherein the second opening (150) is a stepped opening.

9. The cable joint assembly according to any one of claims 1 to 3, wherein an outer diameter of the shielding cover (100) is configured to be equal to an outer diameter of a cable insulation layer (320, 420) surrounding each of the cable conductors (310, 410).

10. The cable joint assembly according to any one of claims 1 to 3, wherein a cross-sectional area of the connecting conductor (200) is not less than a cross-sectional area of each of the cable conductors (310, 410).10P240204CN01

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