CN220252946U

CN220252946U - Cable sheath protector

Info

Publication number: CN220252946U
Application number: CN202223571563.5U
Authority: CN
Inventors: 姜武; 吴可可; 郑新建; 杨阳; 黄相伟; 李志运; 刘彪; 庄严; 窦航
Original assignee: Beijing Qianyuan Wind Power Technology Co ltd; Huaneng Hunan Guidongfeng Power Co ltd; Hunan Clean Energy Branch Of Huaneng International Power Co ltd
Current assignee: Beijing Qianyuan Wind Power Technology Co ltd; Huaneng Hunan Guidongfeng Power Co ltd; Hunan Clean Energy Branch Of Huaneng International Power Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-12-26
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a cable sheath protector, which comprises an insulating sleeve, a zinc oxide resistor disc arranged in the middle of the inner side of the insulating sleeve, and contact electrodes arranged at the upper end and the lower end of the zinc oxide resistor disc, wherein the contact electrodes are positioned in the insulating sleeve; the upper end of the insulating sleeve is clamped with an insulating connecting cover, the insulating connecting cover is provided with a connecting wire, one end of the connecting wire is connected with the contact electrode, and the other end of the connecting wire is connected with a wiring terminal; the anti-wear cover is arranged at the lower end of the insulating sleeve, a screw is connected with the middle part of the anti-wear cover in a threaded manner, a fastening nut is connected with the screw in a threaded manner, a limiting block is fixedly connected with one side of the fastening nut, and the screw is connected with the limiting block in a threaded manner. The utility model protects the cable sheath from high-voltage impact, adopts the integrated insulating connecting cover, the screw and the fastening nut, is convenient and quick to install, and the limiting and fastening device is arranged on the fastening nut, so that the looseness of the nut can be effectively avoided, and the connection reliability of the grounding end is ensured.

Description

Cable sheath protector

Technical Field

The utility model relates to a protector, in particular to a cable sheath protector.

Background

The cable grounding box is applied to a single-core cable grounding system of 35kv and above, because the cable grounding box has poor sealing property and is not tightly controlled in a construction link, the cable grounding box at present frequently induces faults due to the influences of overcurrent, damp, product quality and other factors, the faults of the cable grounding box frequently occur in recent years, the power grid is forced to be powered off for maintenance, and meanwhile, great economic loss is brought to power supply customers. In the line maintenance process, a plurality of power failure coordination personnel are involved, wherein the power failure coordination personnel comprise operation personnel for switching off the gate in a power failure mode, the maintenance personnel eliminate the defect, the dispatcher gives out the order, line personnel are protected from electricity, and the like, so that the workload and the loss of manpower and material resources are increased.

When lightning waves or internal overvoltage flow along the cable core, the cable metal sheath is not grounded, and higher impact overvoltage can occur at the ungrounded end of the cable metal sheath, or when system short-circuit accident current flows through the cable core, high power frequency induction overvoltage can occur at the ungrounded end of the cable metal sheath. The overvoltage can break through the insulation of the outer sheath of the cable, so that the multipoint grounding fault of the metal sheath of the cable is caused, the normal operation of the power cable is seriously influenced, and the service life of the cable is even greatly shortened. Therefore, according to the power industry standard DL/T401-2002 (the rule of the high voltage power cable selection guide rule needs to adopt a cable sheath protector to limit the induced voltage and fault voltage on the power cable metal sheath, in the prior art, two ends of the protector are connected by adopting a connecting piece, the cable is a certain distance from the protector, the cable is connected by adopting a wire, the installation is complex, the grounding end is easy to loosen for a long time after the installation, and the reliability is poor.

Disclosure of Invention

The technical problem to be solved by the utility model is to overcome the defects of the technology and provide a cable sheath protector.

In order to solve the above technical problems, embodiment 1 of the present utility model provides a cable sheath protector: the zinc oxide resistor comprises an insulating sleeve, a zinc oxide resistor disc arranged in the middle of the inner side of the insulating sleeve and contact electrodes arranged at the upper end and the lower end of the zinc oxide resistor disc, wherein the contact electrodes are positioned in the insulating sleeve; the upper end of the insulating sleeve is clamped with an insulating connecting cover, the insulating connecting cover is provided with a connecting wire, one end of the connecting wire is connected with the contact electrode, and the other end of the connecting wire is connected with a connecting terminal; the anti-wear cover is arranged at the lower end of the insulating sleeve, a screw is connected with the middle of the anti-wear cover through threads, a fastening nut is connected with the screw through threads, a limiting block is fixedly connected with one side of the fastening nut, and the screw is connected with the limiting block through threads.

Further, a plurality of annular protrusions are uniformly arranged on the outer side of the insulating sleeve along the axis direction.

Further, the screw is in threaded connection with the wear cap.

Further, the number of the annular protrusions is not less than 3.

Compared with the prior art, the utility model has the advantages that: the utility model protects the cable sheath from high-voltage impact, adopts the integrated insulating connecting cover, the screw and the fastening nut, is convenient and quick to install, and the limiting and fastening device is arranged on the fastening nut, so that the looseness of the nut can be effectively avoided, and the connection reliability of the grounding end is ensured.

Drawings

Fig. 1 is a schematic structural view of a cable sheath protector according to the present utility model.

As shown in the figure:

1. the anti-abrasion device comprises an insulating sleeve, 2, a zinc oxide resistor, 3, a contact electrode, 4, an insulating connecting cover, 5, a connecting wire, 6, a connecting terminal, 7, an anti-abrasion cover, 8, a screw, 9, a fastening nut, 10, a limiting block, 11, a screw, 12 and an annular protrusion.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Referring to fig. 1, a cable sheath protector comprises an insulating sleeve 1, a zinc oxide resistor disc 2 arranged in the middle of the inner side of the insulating sleeve 1, and contact electrodes 3 arranged at the upper end and the lower end of the zinc oxide resistor disc 2, wherein the contact electrodes 3 are positioned in the insulating sleeve 1; the upper end of the insulating sleeve 1 is clamped with an insulating connecting cover 4, the insulating connecting cover 4 is provided with a connecting wire 5, one end of the connecting wire 5 is connected with the contact electrode 3, and the other end of the connecting wire 5 is connected with a connecting terminal 6; the anti-wear cover 7 is arranged at the lower end of the insulating sleeve 1, a screw 8 is connected with the middle of the anti-wear cover 7 in a threaded manner, a fastening nut 9 is connected with the screw 8 in a threaded manner, a limiting block 10 is fixedly connected with one side of the fastening nut 9, and a screw 11 is connected with the limiting block 10 in a threaded manner.

The insulating cover 1 outside is evenly equipped with a plurality of annular protruding 12 along the axis direction, the quantity of annular protruding 12 is not less than 3, compares the umbrella skirt setting, and this design has occupation space little characteristics, has also reached certain creepage distance simultaneously.

The screw 11 is screwed with the wear-resistant cover 7.

In the concrete implementation of the utility model, the wiring terminal 6 is connected with the wiring terminal of the cable, the grounding terminal or the wiring bar is arranged between the fastening nut 9 and the anti-abrasion cover 7, the screw 8 is screwed down, the anti-abrasion cover 7 close to the fastening nut 9 is pressed against the grounding terminal or the wiring bar, and the screw 11 is screwed down.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, "plurality" means at least 2.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. A cable sheath protector, characterized in that: the insulation sleeve comprises an insulation sleeve (1), a zinc oxide resistor disc (2) arranged in the middle of the inner side of the insulation sleeve (1) and contact electrodes (3) arranged at the upper end and the lower end of the zinc oxide resistor disc (2), wherein the contact electrodes (3) are positioned in the insulation sleeve (1);

the upper end of the insulating sleeve (1) is clamped with an insulating connecting cover (4), the insulating connecting cover (4) is provided with a connecting wire (5), one end of the connecting wire (5) is connected with the contact electrode (3), and the other end of the connecting wire (5) is connected with a connecting terminal (6);

the anti-wear cover (7) is arranged at the lower end of the insulating sleeve (1), a screw (8) is connected with the middle of the anti-wear cover (7) in a threaded mode, a fastening nut (9) is connected to the screw (8) in a threaded mode, a limiting block (10) is fixedly connected to one side of the fastening nut (9), and a screw (11) is connected to the limiting block (10) in a threaded mode.

2. The cable sheath protector of claim 1, wherein: a plurality of annular bulges (12) are uniformly arranged on the outer side of the insulating sleeve (1) along the axial direction.

3. The cable sheath protector of claim 1, wherein: the screw (11) is in threaded connection with the anti-abrasion cover (7).

4. The cable sheath protector of claim 2, wherein: the number of the annular protrusions (12) is not less than 3.