Cable terminal

Abstract

The utility model provides a cable terminal. The cable terminal comprises a terminal body; an insulating member which is arranged around the terminal body; and a leakage current collection ring, which is integrated into the insulating member; wherein at least a portion of the leakage current collection ring is directly connected to an inner surface of the insulating member.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of electrical connection, and in particular to a cable terminal. Background Art

[0002] Cable terminations are used to establish both the physical and electrical connection between the end of the cable and the equipment. They also need to isolate high and low voltages. Cable terminations feature an outer insulation layer, typically made of insulating rubber. When the surface of the outer insulation layer becomes covered with dirt, the moisture in the dirt reduces the resistivity of the rubber surface and forms a conductive path, which can cause leakage current at certain operating voltages. High humidity can also cause a damp conductive layer to form on the surface of the outer insulation layer, which can also generate leakage current. Long-term current leakage from the outer insulation layer can lead to aging and damage. This is especially true for high-voltage cable terminations (such as 66kV dry-type cable terminations). If there's no way to ground the leakage current, the cable termination can be damaged, shortening its service life.

[0003] To eliminate leakage current, conventional techniques typically involve installing a leakage current collection structure (e.g., a stainless steel clip connected to the stainless steel clip with a copper wire) on the exterior of the outer insulation layer. This structure is then grounded to divert any leakage current from the outer insulation layer to the ground. However, this approach presents drawbacks: the installation of the leakage current collection structure is complex and inconvenient; the existing leakage current collection structure (e.g., the stainless steel clip and / or copper wire) can easily damage the outer insulation layer made of insulating rubber; and components within the existing leakage current collection structure, such as the copper wire, are easily damaged by external forces. Utility Model Content

[0004] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0005] According to one aspect of the present invention, a cable terminal is provided, comprising: a terminal body; an insulating member, the insulating member being arranged around the terminal body; and a leakage current collecting ring, the leakage current collecting ring being integrated into the insulating member; wherein at least a portion of the leakage current collecting ring is directly connected to the inner surface of the insulating member.

[0006] According to an exemplary embodiment of the present invention, the terminal body has an end portion, and the leakage current collecting ring is provided at the end portion of the terminal body.

[0007] According to an exemplary embodiment of the present invention, an electrical stress control unit is provided at the end portion of the terminal body; wherein at least a portion of the leakage current collecting ring is inserted between the insulating member and the electrical stress control unit.

[0008] According to an exemplary embodiment of the present invention, a step portion is formed on an inner surface of the insulating member, and the at least a portion of the leakage current collecting ring abuts against the step portion.

[0009] According to an exemplary embodiment of the present invention, the at least a portion of the leakage current collecting ring has a hollow cylindrical shape.

[0010] According to an exemplary embodiment of the present invention, the cable terminal may further include: a sealing tape, wherein the sealing tape is wound at least around a connection between the leakage current collecting ring and the insulating member.

[0011] According to an exemplary embodiment of the present invention, the cable terminal may further include: a heat shrink tube, which is installed at least at a connection between the leakage current collecting ring and the insulating member.

[0012] According to an exemplary embodiment of the present invention, the leakage current collecting ring is made of semi-conductive silicone rubber.

[0013] According to an exemplary embodiment of the present invention, the leakage current collecting ring is used for grounding.

[0014] According to an exemplary embodiment of the present invention, the cable terminal is a dry-type cable terminal suitable for a voltage of 66 kV.

[0015] According to the cable terminal provided by the aforementioned exemplary embodiments of the present invention, by integrating at least a portion of the leakage current collecting ring into the interior of the insulating component, the leakage current collecting ring directly contacts the outer surface of the terminal body and the inner surface of the insulating component inside the insulating component, thereby overcoming the defects of the leakage current collection structure in the prior art, such as the invariable installation caused by being arranged outside the external insulating layer, easy damage to the external insulating layer and / or easy destruction by external forces, thereby improving the service life and safety of the cable terminal.

[0016] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram showing the three-dimensional structure of a cable terminal according to an exemplary embodiment of the present utility model;

[0018] Figure 2 It is a schematic cross-sectional structural diagram showing a cable terminal according to an exemplary embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The following examples and accompanying drawings further illustrate the technical solution of the present invention. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as limiting the present invention.

[0020] In addition, in the following detailed description, for ease of explanation, numerous specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments can be practiced without these specific details. In other cases, well-known structures and devices are shown in diagrammatic form to simplify the accompanying drawings.

[0021] The utility model provides a cable terminal, which is mainly used to realize the physical and electrical connection between the cable and the equipment end. Figure 1 and Figure 2 According to an exemplary embodiment of the present invention, a cable terminal 10 primarily comprises: a terminal body 1, an insulating member 2, and a leakage current collection ring 3. It should be noted that in the illustrated exemplary embodiment, the cable terminal 10 can be a dry-type cable terminal suitable for 66 kV voltage, or other suitable types of cable terminal. It should also be noted that the terminal body 1 can include components known in the art for achieving electrical connections (such as electrical connection terminals and a housing), and this is not limited herein.

[0022] According to the present invention, the insulating member 2 is arranged around the terminal body 1 and is used to achieve electrical insulation of the terminal body 1. The leakage current collecting ring 3 is integrated into the insulating member 2 and is used to collect the leakage current from the terminal body 1 and / or the insulating member 2 and perform grounding processing. Figure 1 and Figure 2 In the exemplary embodiment shown, the insulating member 2 can be made of insulating rubber and has a generally hollow cylindrical shape. The outer surface of the insulating member 2 is provided with an umbrella skirt structure, and the interior of the insulating member 2 has an inner surface. The insulating member 2 is directly sleeved on the outer surface of the terminal body 1, and at least a portion of the inner surface of the insulating member 2 is in direct contact with the outer surface of the terminal body 1. Figure 1 and Figure 2 In the exemplary embodiment shown, the leakage current collecting ring 3 may be made of a material such as semi-conductive silicone rubber, which has good electrical conductivity and aging resistance.

[0023] According to the design concept of the present invention, at least a portion of the leakage current collection ring 3 is directly connected (directly in contact) to the inner surface of the insulating member 2 and is wrapped inside the insulating member 2, so that the leakage current collection ring 3 is integrated into the interior of the insulating member 2. According to an exemplary embodiment of the present invention, one end of the leakage current collection ring 3 is connected to the inner surface of the insulating member 2, and the other end is directly grounded through an external grounding line to form a low-impedance leakage current path. In this way, the leakage current collection ring 3 is integrated inside the insulating member 2. When the insulating member 2 (for example, the outer surface with an umbrella skirt structure) generates leakage current due to dirt coverage and humidity, the leakage current collection ring 3 can effectively collect and guide this leakage current to the ground, thereby avoiding direct damage to the insulating member 2 by the leakage current, thereby improving the service life and safety of the cable terminal 10.

[0024] Specifically, if Figure 1 and Figure 2 As shown, according to an exemplary embodiment of the present invention, the terminal body 1 has an end portion, and the leakage current collecting ring 3 can be provided at the end portion of the terminal body 1 .

[0025] Specifically, if Figure 1 and Figure 2 As shown, according to an exemplary embodiment of the present invention, the cable terminal 10 further includes: an electric stress control unit 4. The electric stress control unit 4 is arranged at the end of the terminal body 1; wherein, at least a portion of the leakage current collecting ring 3 is inserted between the insulating member 2 and the electric stress control unit 4. That is, the inner surface of at least a portion of the leakage current collecting ring 3 can be in direct contact with the outer surface of the electric stress control unit 41, and the outer surface of at least a portion of the leakage current collecting ring 3 can be in direct contact with the inner surface of the insulating member 2. The electric stress control unit 4 and the terminal body 1 can have the same diameter, or the diameter of the electric stress control unit 4 can be slightly smaller than the diameter of the terminal body 1. In addition, the electric stress control unit 4 can be arranged between the end of the terminal body 1 and the remaining portion of the leakage current collecting ring 3 except for the aforementioned at least one portion.

[0026] Specifically, if Figure 1 and Figure 2 As shown, according to an exemplary embodiment of the present invention, the inner surface of the insulating member 2 is formed with a step portion 2a, and at least a portion of the leakage current collecting ring 3 abuts against the step portion 2a. Figure 1 and Figure 2As shown, an annular step 2a is formed on the inner surface of the insulating member 2. At least a portion of the leakage current collection ring 3 is generally annular in shape. At least a portion of the leakage current collection ring 3 is inserted from the end of the insulating member 2 into the interior of the insulating member 2 until it abuts against the step 2a formed on the inner surface of the insulating member 2. Furthermore, the insulating member 2, made of insulating rubber, uses its inherent elasticity to press at least a portion of the leakage current collection ring 3, once inserted into the insulating member 2, against the outer surface of the electrical stress control unit 4 (and even the terminal body 1).

[0027] According to an exemplary embodiment of the present invention, the cable terminal 10 may further include: a sealing tape (not shown). The sealing tape is wound around at least the connection between the leakage current collecting ring 3 and the insulating member 2. According to an exemplary embodiment of the present invention, the cable terminal 10 may further include: a heat shrink tube (not shown). The heat shrink tube is installed at least at the connection between the leakage current collecting ring 3 and the insulating member 2. In order to maintain the waterproof performance of the cable terminal 10, the present invention also adopts sealing tape winding and / or heat shrink tube installation to cover the connection between the leakage current collecting ring 3 and the insulating member 2 to ensure the sealing and durability of the overall structure of the cable terminal 10. According to design requirements, the cable terminal 10 may include only one of the sealing tape and the heat shrink tube, or may include both the sealing tape and the heat shrink tube.

[0028] According to the cable terminal provided by the aforementioned exemplary embodiments of the present invention, by integrating at least a portion of the leakage current collecting ring into the interior of the insulating component, the leakage current collecting ring directly contacts the outer surface of the terminal body and the inner surface of the insulating component inside the insulating component, thereby overcoming the defects of the leakage current collection structure in the prior art, such as the invariable installation caused by being arranged outside the external insulating layer, easy damage to the external insulating layer and / or easy destruction by external forces, thereby improving the service life and safety of the cable terminal.

[0029] Those skilled in the art will appreciate that the embodiments described above are exemplary and that they may be improved upon. The structures described in the various embodiments may be freely combined without causing any conflict in structure or principle.

[0030] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0031] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0032] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element number in the claims should not be construed as limiting the scope of the present invention.

Claims

1. A cable terminal, characterized in that: The cable terminal comprises: Terminal body; an insulating member disposed around the terminal body; and a leakage current collecting ring, the leakage current collecting ring being integrated into the insulating member; Wherein, at least a portion of the leakage current collecting ring is directly connected to the inner surface of the insulating component.

2. The cable terminal according to claim 1, wherein The terminal body has an end portion, and the leakage current collecting ring is arranged at the end portion of the terminal body.

3. The cable terminal according to claim 2, wherein: an electrical stress control unit, the electrical stress control unit being disposed at the end portion of the terminal body; Wherein, the at least a portion of the leakage current collecting ring is inserted between the insulating component and the electrical stress control unit.

4. The cable terminal according to claim 3, wherein A step portion is formed on an inner surface of the insulating member, and the at least a portion of the leakage current collecting ring abuts against the step portion.

5. The cable terminal according to claim 4, wherein: The at least a portion of the leakage current collecting ring has a hollow cylindrical shape.

6. The cable terminal according to any one of claims 1 to 5, characterized in that The cable terminal further comprises: A sealing tape is wound around at least a connection between the leakage current collecting ring and the insulating member.

7. The cable terminal according to any one of claims 1 to 5, characterized in that The cable terminal further comprises: A heat shrink tube is installed at least at a connection between the leakage current collecting ring and the insulating component.

8. The cable terminal according to any one of claims 1 to 5, characterized in that The leakage current collecting ring is made of semi-conductive silicone rubber.

9. The cable terminal according to any one of claims 1 to 5, characterized in that The leakage current collecting ring is used for grounding.

10. The cable terminal according to any one of claims 1 to 5, characterized in that The cable terminal is a dry-type cable terminal suitable for a voltage of 66 kV.

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