CN220711095U

CN220711095U - Cable joint

Info

Publication number: CN220711095U
Application number: CN202322361728.4U
Authority: CN
Inventors: 徐志林; 周学军; 张涛; 殷军明
Original assignee: Zhenjiang Dangao Power Technology Co ltd
Current assignee: Zhenjiang Dangao Power Technology Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-04-02
Anticipated expiration: 2033-08-31

Abstract

The utility model discloses a cable connector, which comprises a connector body, wherein a stress cone is arranged in the connector body, a cable is arranged in the stress cone, the cable, the stress cone and the connector body are sequentially arranged from inside to outside, a deformation sleeve is arranged at a port of the connector body, the deformation sleeve is sleeved on the outer wall of the stress cone, and the deformation sleeve is inwards contracted and deformed and is included on the outer wall of the stress cone; the beneficial effects of the utility model are as follows: under the thermal expansion condition, when the joint body cannot be well wrapped on the outer wall of the stress cone, the cable is assembled into the stress cone, then the stress cone is directly assembled into the joint body, and then the joint body and the stress cone are deformed through inward contraction of the deformation sleeve, so that a gap between the joint body and the stress cone is sealed, the mechanical connection strength is improved, the integral sealing performance is improved, and the problem that the integral use is influenced by the poor sealing performance under the thermal expansion condition is avoided.

Description

Cable joint

Technical Field

The present utility model relates to a cable joint.

Background

With the continuous improvement of the capacity of the power grid, the ultra-high voltage cable is more and more widely used. The performance and reliability of a cable joint, which is one of the key components of a cable, directly affects the stable operation of the entire power system. The existing cable connector interference fit design has the problem of thermal expansion matching, and the connector and the cable can cause material thermal expansion mismatch due to temperature change in the operation process, so that the interference magnitude is deviated, and the mechanical strength and the sealing performance of the connector can be influenced especially when the connector is assembled in a high-temperature environment. This has become a key issue limiting the performance and reliability of ultra-high voltage cable connectors, and in view of this, the present utility model proposes a cable connector to solve the above-mentioned problems.

Disclosure of Invention

The present utility model is directed to a cable joint, which solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a cable joint, includes the joint body, this internal stress cone that is provided with of joint, be provided with the cable in the stress cone, cable, stress cone and joint body set gradually from inside to outside, joint body port is provided with deformation cover, deformation cover is established on the outer wall of stress cone, deformation cover inwards contracts deformation and includes on the outer wall of stress cone.

As an improvement of the technical scheme, the outer wall of the deformation sleeve is provided with the annular groove, the annular groove is internally provided with the tightening hoop, and the tightening hoop is contracted inwards to enable the deformation sleeve to be wrapped on the outer wall of the stress cone.

As an improvement of the technical scheme, a plurality of groups of sealing rings are arranged on the inner wall of the deformation sleeve, and the plurality of groups of sealing rings are uniformly arranged on the inner wall of the deformation sleeve;

the deformation sleeve deforms inwards to enable the sealing ring to be in contact with the surface of the stress cone.

As an improvement of the technical scheme, the joint body is provided with a joint insulating layer, an inner joint voltage-equalizing layer is arranged in the joint insulating layer, and the inner joint voltage-equalizing layer is wrapped on the stress cone;

the stress cone is provided with a stress cone insulating layer and a stress cone semi-conductive layer, and the stress cone semi-conductive layer is arranged at the position of the deformation sleeve.

As an improvement of the technical scheme, the outer part of the joint insulating layer is provided with a joint outer shielding layer.

As an improvement of the technical scheme, the joint body is in interference fit with the stress cone, and the interference is 2mm.

Compared with the prior art, the utility model has the beneficial effects that:

under the condition of thermal expansion, when the joint body cannot be well wrapped on the outer wall of the stress cone, the cable is assembled into the stress cone, then the stress cone is directly assembled into the joint body, and then the gap between the joint body and the stress cone is sealed through inward shrinkage deformation of the deformation sleeve, so that the mechanical connection strength and the integral sealing performance are improved, and the influence of poor sealing performance under the condition of thermal expansion on the integral use is avoided; of course, the deformation sleeve is inwards contracted and wrapped on the outer wall of the stress cone, so that the joint body and the stress cone joint can be reinforced and positioned, and the overall practicability is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the joint body of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;

FIG. 4 is a schematic view of the structure of the stress cone of the present utility model.

In the figure: 10. a joint body; 11. a joint outer shielding layer; 12. a pressure equalizing layer in the joint; 13. a joint insulating layer; 20. a stress cone; 21. a stress cone insulating layer; 22. a stress cone semiconductive layer; 30. a cable; 40. a deformation sleeve; 41. an annular groove; 42. a seal ring; 50. and (5) tightening the hoop.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples:

as shown in fig. 1-4, this embodiment provides a cable joint, including a joint body 10, be provided with stress cone 20 in the joint body 10, be provided with cable 30 in the stress cone 20, cable 30, stress cone 20 and joint body 10 set gradually from inside to outside, joint body 10 port is provided with deformation cover 40, deformation cover 40 cover is established on the outer wall of stress cone 20, deformation cover 40 inwards contracts deformation and includes on the outer wall of stress cone 20.

In this embodiment, when the connector body 10 cannot be well wrapped on the outer wall of the stress cone 20 under the condition of thermal expansion, the cable 30 is assembled into the stress cone 20, then the stress cone 20 is directly assembled into the connector body 10, and then the gap between the connector body 10 and the stress cone 20 is sealed by inward shrinkage deformation of the deformation sleeve 40, so that the mechanical connection strength and the overall sealing performance are improved, and the problem that the poor sealing performance under the condition of thermal expansion affects the overall use is avoided;

of course, the deformation sleeve 40 is inwards contracted and wrapped on the outer wall of the stress cone 20, so that the joint of the joint body 10 and the stress cone 20 can be reinforced and positioned, and the overall practicability is improved.

Specifically, the outer wall of the deformation sleeve 40 is provided with an annular groove 41, a tightening hoop 50 is arranged in the annular groove 41, and the tightening hoop 50 is contracted inwards so that the deformation sleeve 40 is wrapped on the outer wall of the stress cone 20.

In this embodiment, the deformation sleeve 40 can shrink and deform inwards through the provided tightening hoop 50, so as to wrap the outer wall of the stress cone 20, so as to improve the sealing performance, and of course, the annular groove 41 can improve the positioning stability of the tightening hoop 50, and avoid the slipping phenomenon.

Specifically, the inner wall of the deformation sleeve 40 is provided with a plurality of groups of sealing rings 42, and a plurality of groups of sealing rings 42 are uniformly arranged on the inner wall of the deformation sleeve 40;

the deformation sleeve 40 deforms inwardly such that the seal ring 42 contacts the surface of the stress cone 20.

In this embodiment, the sealing ring 42 contacts the stress cone 20 to form a first seal, and when the tightening hoop 50 is tightened, the sealing ring 42 can be more attached to the stress cone 20, so as to further improve the sealing performance.

Specifically, the joint body 10 is provided with a joint insulating layer 13, an inner joint voltage equalizing layer 12 is arranged in the joint insulating layer 13, and the inner joint voltage equalizing layer 12 is wrapped on the stress cone 20;

the stress cone 20 is provided with a stress cone insulating layer 21 and a stress cone semi-conductive layer 22, and the stress cone semi-conductive layer 22 is arranged at the position of the deformation sleeve 40.

Specifically, the outer part of the joint insulating layer 13 is provided with a joint outer shielding layer 11.

In the scheme, the joint body 10 is firstly provided with a joint inner voltage equalizing layer 12 and a joint outer shielding layer 11, raw edges are removed, then the joint body is put into a mould, and insulating rubber is injected from a glue injection hole of the joint outer shielding layer 11 for molding; firstly, manufacturing a semiconductive layer of the stress cone 20, putting the semiconductive layer into a mould, and then injecting insulating rubber for molding;

of course, to ensure the insulating performance, ethylene propylene diene monomer insulating rubber is selected, the volume resistivity is 1 x 1015 Ω & cm, ethylene propylene diene monomer semiconducting rubber is selected as the semiconducting rubber, the volume resistivity is less than 2 x 103 Ω & cm, and to ensure the molding quality of the material and prevent the later precipitation of the material components, DCP is used as the molding bridging agent.

Specifically, the joint body 10 and the stress cone 20 are in interference fit, and the interference is 2mm.

In this embodiment, through the interference fit that sets up, when the thermal expansion phenomenon does not appear, can further improve sealing performance.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cable joint, characterized in that: including joint body (10), be provided with stress cone (20) in joint body (10), be provided with cable (30) in stress cone (20), cable (30), stress cone (20) and joint body (10) are set gradually from inside to outside, joint body (10) port is provided with deformation cover (40), deformation cover (40) cover is established on the outer wall of stress cone (20), deformation cover (40) inwards shrink deformation includes on the outer wall of stress cone (20).

2. A cable joint according to claim 1, characterized in that: an annular groove (41) is formed in the outer wall of the deformation sleeve (40), a tightening hoop (50) is arranged in the annular groove (41), and the tightening hoop (50) is contracted inwards to enable the deformation sleeve (40) to be wrapped on the outer wall of the stress cone (20).

3. A cable joint according to claim 1, characterized in that: the inner wall of the deformation sleeve (40) is provided with a plurality of groups of sealing rings (42), and the plurality of groups of sealing rings (42) are uniformly arranged on the inner wall of the deformation sleeve (40);

the deformation sleeve (40) deforms inwardly such that the sealing ring (42) contacts the surface of the stress cone (20).

4. A cable joint according to claim 1, characterized in that: the connector body (10) is provided with a connector insulating layer (13), an inner connector pressure equalizing layer (12) is arranged in the connector insulating layer (13), and the inner connector pressure equalizing layer (12) is wrapped on the stress cone (20);

the stress cone (20) is provided with a stress cone insulating layer (21) and a stress cone semi-conducting layer (22), and the stress cone semi-conducting layer (22) is arranged at the position of the deformation sleeve (40).

5. A cable joint according to claim 4, wherein: the outside of the joint insulating layer (13) is provided with a joint outer shielding layer (11).

6. A cable joint according to claim 1, characterized in that: the connector body (10) is in interference fit with the stress cone (20), and the interference is 2mm.