CN217215938U

CN217215938U - Cold-shrinking intermediate joint for cable with standard insulation thickness

Info

Publication number: CN217215938U
Application number: CN202220992236.8U
Authority: CN
Inventors: 徐志林; 张涛; 殷军明
Original assignee: Zhenjiang Dangao Power Technology Co ltd
Current assignee: Zhenjiang Dangao Power Technology Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-08-16
Anticipated expiration: 2032-04-27

Abstract

The utility model discloses a cold contraction intermediate joint for a cable with standard insulation thickness; the utility model comprises a connector body and a supporting pipe, wherein the connector body is arranged on the surface of a cable after stripping and cutting, after the end of the cable to be connected is stripped and cut, a connecting pipe of a cable core is compressed, the connector is positioned, the supporting pipe in the connector is taken out, the connector is conveniently coated on the cable to provide insulation protection for the cable connection part, the connector body comprises a stress pipe which is embedded and connected on the surface of the cable stripping and cutting part, stress cones are arranged at two ends of the stress pipe, the stress cones are used for processing the electric field at the cable shielding fracture part, the stress pipe is used for shielding the electric field at the cable core connection part to avoid the discharge of sharp corners at the core connection part, the insulation sizing material is injected from one end, an injection opening is annular, annular injection glue is used for ensuring the easy flow of the sizing material in a mould, the compactness of the sizing material is ensured, and the annular injection glue is used for easily removing the air in the mould cavity to avoid the generation of bubbles, and thirdly, the cracking of the glue injection port of the product is avoided.

Description

Cold contraction intermediate joint for standard insulation thickness cable

Technical Field

The utility model relates to a cable joint equipment technical field specifically is a shrinkage intermediate head for standard insulation thickness cable.

Background

The cable connector is also called a cable head. After the cable is laid, the sections of the cable must be connected into a single unit in order to form a continuous line, and these connection points are called cable connectors. The cable joints at the middle of the cable run are called intermediate joints and the cable joints at the two ends of the run are called termination joints. The cable joint is used for locking and fixing the incoming and outgoing lines, and plays a role in water resistance, dust prevention and vibration prevention.

Patent No. CN103166163A discloses a cable joint comprising: the body is in a hollow column shape, and a plurality of limiting grooves are formed in the body; the clamping head comprises a fixed end and a clamping end, a plurality of limiting ribs are formed on the outer side surface of the fixed end, and when the clamping head is accommodated in the body, the limiting ribs are accommodated in the limiting grooves; the clamping end comprises a plurality of clamping claws which can deform along the radial direction of the clamping head according to the action of external force, and the clamping claws form a hollow frustum shape together; a seal ring having a shape corresponding to a hollow frustum formed at the clamping end for being received in the clamping end; and a nut for receiving the clamping end and engaging the body. The cable joint that above-mentioned embodiment provided has increased the setting of pressing from both sides tight claw and sealing washer, can utilize to press from both sides tight head and compress tightly the sealing washer, can reach higher waterproof performance, and improved the clamp force of cable joint to the cable conductor.

However, the existing cable intermediate joint has some problems in the use process, at present, in a transmission and distribution network line, a medium-voltage cable often needs to be connected, a cold-shrink intermediate joint is frequently used, and a cold-shrink intermediate joint is difficult to perform an insulation test, so that a cold-shrink intermediate joint product is required to be reliable enough from the design to the process, the insulation margin of the traditional cold-shrink intermediate joint design is large, but the design and the process of the product cannot reach the optimal performance, therefore, the cold-shrink intermediate joint is designed by improving the design of the product, and the product performance is improved from the design and the process.

Disclosure of Invention

An object of the utility model is to provide a shrinkage intermediate head for standard insulation thickness cable to solve the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the cable joint comprises a cable and a joint body, wherein the joint body is connected with the surface of the stripped cable in a nested manner, and supporting pipes are connected with the joints of the cable and the two ends of the joint body in a matched manner;

the joint body is including inlaying the stress tube of connecting on cable stripping and cutting department surface, cable stripping and cutting department surface both ends periphery is inlayed and is connected with the stress cone, the stress cone sets up stress tube both ends are used for right cable stripping and cutting department surface and inside both ends are connected and are met.

Preferably, a cone cambered surface is formed in one side inside the stress cone, and the cone cambered surface is in a horn shape which is enlarged from inside to outside, so that the cone cambered surface can be conveniently connected with the cable body.

Preferably, the stress tube and the stress cone are connected with an insulating layer covering the surface in an embedded mode.

Preferably, the glue injection port is formed in the connection joint of the two ends of the insulating layer and the stress cone, the glue injection port is annular, so that materials can be conveniently injected, and the injection convenience is improved.

Preferably, the glue injection ports are used for injecting insulating glue, and the glue injection ports are distributed on the outer ring of the surface of the stress cone.

Preferably, the surface of the insulating layer is uniformly connected with an outer shielding layer in an embedded mode, and the thickness of the outer shielding layer is 1.5 mm.

Preferably, the insulating layer is formed by injection molding of an insulating rubber compound.

Preferably, the stress cone and the stress tube have no sharp angle on the surface, and the inner wall of the outer shielding layer has no sharp angle, so that the integral installation and connection are facilitated.

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

the cold-shrink intermediate joint is prepared by using liquid silicon rubber, pre-expanded before leaving a factory, and internally supported by a support tube, and during installation, the cold-shrink intermediate joint is sleeved into a prepared cable, and the support tube and the support bar are drawn out, so that the cold-shrink intermediate joint is wrapped on the cable to provide insulation protection for the cable joint, wherein the material is liquid silicon rubber material; the filling and reinforcing materials use fumed silica, and are reasonably proportioned; the vulcanization system adopts platinum compound, the platinum compound is vulcanized, and the crosslinking degree of silica gel molecules can reach 98%. The tensile strength of the material is required to reach more than 10Mpa, the elongation at break reaches about 900%, the tearing strength is more than 40N/mm, the tensile permanent deformation rate is less than 5%, the joint is designed to be a three-composite structure, and a stress cone, a stress tube, an outer shielding layer and main insulation are designed. The main insulation is the joint insulation. The stress cone is used for processing an electric field at the shielding fracture of the cable. The stress tube is used for shielding an electric field at the joint of cable cores and avoiding sharp-angled discharge at the joint of the cable cores. The outer shielding layer is used for shielding an electric field on the surface of the connector and is matched with a shielding wire to guide away induced electricity, the stress cone and the stress pipe are sleeved in a finished product mold core and are positioned as required, then the outer shielding layer is sleeved in, an insulating rubber material is injected by die assembly, the insulating rubber material is injected from one end, an injection opening is annular, annular injection is firstly performed to ensure that the rubber material is easy to flow in the mold and ensure the compactness of the rubber material, and secondly, the annular injection is performed to easily remove air in the mold cavity, so that bubbles are avoided, and thirdly, cracking of the injection opening of the product is avoided.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural view of a joint body according to an embodiment of the present invention;

fig. 3 is a schematic view of a stress cone structure according to an embodiment of the present invention.

In the figure: 1. a cable; 2. supporting a tube; 301. a stress tube; 302. an insulating layer; 303. a glue injection port; 304. a stress cone; 305. an outer shield layer; 306. a cambered surface of a vertebral body.

Detailed Description

In order to facilitate the problem of solving, the embodiment of the utility model provides a shrinkage intermediate head for standard insulation thickness cable. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the present embodiment provides a connector including a cable 1 and a connector body, wherein the cable 1 is connected to the connector body by nesting on the surface of the stripped cable 1, the joints between the cable 1 and the two ends of the connector body are connected to support pipes 2 in a matching manner, the connector body includes a stress tube 301 connected to the surface of the stripped position of the cable 1 in an embedded manner, stress cones 304 are embedded and connected to the two ends of the surface of the stripped position of the cable 1, and the stress cones 304 are disposed at the two ends of the stress tube 301 for connecting and connecting the surface of the stripped position of the cable 1 and the two ends inside the cable 1.

In the embodiment, a connecting joint body is installed on the surface of a stripped and cut cable 1, after the end of a cable needing to be connected is stripped and cut, a connecting pipe 2 of a cable core is compressed, the joint is positioned, a supporting pipe 2 in the joint is taken out, the joint is coated on the cable 1 to provide insulation protection for the cable joint, a cold-shrink intermediate joint is prepared by using liquid silicon rubber, is pre-expanded before leaving a factory, is internally supported by the supporting pipe 2, is sleeved into the prepared cable during installation, is drawn out of the supporting pipe 2, and is coated on the cable to provide insulation protection for the cable joint, wherein the material is liquid silicon rubber material; the filling and reinforcing materials use fumed silica, and are reasonably proportioned; the vulcanization system adopts platinum compound, the platinum compound is vulcanized, and the crosslinking degree of silica gel molecules can reach 98%. The tensile strength of the material is required to reach more than 10Mpa, the elongation at break reaches about 900%, the tear strength is more than 40N/mm, the tensile permanent deformation rate is less than 5%, the joint is designed to be a three-composite structure, and a stress cone 304, a stress tube 301, an outer shielding layer 305 and an insulating layer 302 are designed. The insulating layer 302 is a joint insulating portion. The stress cone 304 functions to address the electric field at the cable shield break. Stress tube 301's effect is the electric field of shielding cable core junction, avoids the sinle silk junction closed angle to discharge. Outer shielding layer 305 is the shielded joint surface electric field to cooperate the shielded wire to lead away the response electricity, stress cone 304, finished product mold core is gone into to stress tube 301 suit, the location is good according to the requirement, suit again goes into outer shielding layer 305, the compound die injection insulating sizing material, insulating sizing material is injected from one end, injecting glue mouth 303 is the annular, annular injecting glue is firstly guaranteed the sizing material and is easily flowed in the mould, guarantee the closely knit degree of sizing material, secondly the air in the mould intracavity is easily got rid of to annular injecting glue, avoid the bubble to produce, thirdly, avoid the injecting glue mouth 303 department fracture of product.

Example 2

Referring to fig. 1-3, a further improvement is made on the basis of embodiment 1: centrum cambered surface 306 has been seted up to the inside one side of stress cone 304, centrum cambered surface 306 is by interior and loudspeaker form of enlargeing outward, is convenient for be connected with cable 1 body, stress tube 301 with stress cone 304 surface is inlayed and is connected with the insulating layer 302 that covers on its surface, glue injection mouth 303 has been seted up with stress cone 304 joint department at insulating layer 302 both ends, glue injection mouth 303 is the annular, it is convenient for carry out injection material, increase the injection convenience, glue injection mouth 303 is used for injecting insulating sizing material, glue injection mouth 303 distributes in stress cone 304 surface outer lane, insulating layer 302 surface is evenly inlayed and is connected with outer shielding layer 305, outer shielding layer 305 thickness is 1.5mm, insulating layer 302 is formed by insulating sizing material injection moulding, stress cone 304 with stress tube 301 surface does not have the closed angle, outer shielding layer 305 inner wall does not have the closed angle, is convenient for wholly install and connect.

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

Claims

1. A shrinkage intermediate head for standard insulation thickness cable which characterized in that: the cable joint comprises a cable (1) and a joint body, wherein the joint body is connected with the surface of the stripped cable (1) in a nested manner, and supporting tubes (2) are connected with the joints of the cable (1) and the two ends of the joint body in a matched manner;

the joint body is including inlaying stress tube (301) of connecting at cable (1) strip-off cut surface, cable (1) strip-off cut surface both ends periphery is inlayed and is connected with stress cone (304), stress cone (304) set up stress tube (301) both ends are used for right cable (1) strip-off cut surface and inside both ends are connected and are met.

2. A cold shrink intermediate joint for a standard insulation thickness cable as claimed in claim 1, wherein: a cone arc surface (306) is formed in one side of the inner portion of the stress cone (304), and the cone arc surface (306) is in a horn shape which is enlarged from inside to outside.

3. A cold shrink intermediate joint for a standard insulation thickness cable as claimed in claim 1, wherein: the surfaces of the stress tube (301) and the stress cone (304) are embedded and connected with an insulating layer (302) covering the surfaces of the stress tube and the stress cone.

4. A cold shrink intermediate joint for a cable of standard insulation thickness as claimed in claim 3, wherein: glue injection openings (303) are formed in the connection and connection positions of the two ends of the insulating layer (302) and the stress cone (304), and the glue injection openings (303) are annular.

5. A cold shrink intermediate joint for standard insulation thickness cables as claimed in claim 4 wherein: the glue injection openings (303) are used for injecting insulating glue, and the glue injection openings (303) are distributed on the outer ring of the surface of the stress cone (304).

6. A cold shrink intermediate joint for a cable of standard insulation thickness as claimed in claim 3, wherein: insulating layer (302) surface is evenly inlayed and is connected with outer shielding layer (305), outer shielding layer (305) thickness is 1.5 mm.

7. A cold shrink intermediate joint for standard insulation thickness cables as claimed in claim 6 wherein: the insulating layer (302) is formed by injection molding of an insulating rubber material.

8. A cold shrink intermediate joint for standard insulation thickness cables as claimed in claim 6 wherein: the stress cone (304) and the stress tube (301) have no sharp angle on the surface, and the inner wall of the outer shielding layer (305) has no sharp angle.