CN209929503U

CN209929503U - Shielding type large-current high-voltage separable direct-plug cable connector

Info

Publication number: CN209929503U
Application number: CN201920938277.7U
Authority: CN
Inventors: 周平江; 周少楠; 齐晓武
Original assignee: SHENZHEN CHUANGYIN TECHNOLOGY Co Ltd
Current assignee: SHENZHEN CHUANGYIN TECHNOLOGY Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-01-10
Anticipated expiration: 2029-06-20

Abstract

The utility model provides a shielding type large-current high-voltage separable direct-plug cable connector, which comprises a straight plug, a stress piece and a wiring terminal which are arranged in an axial hole of the straight plug, a cable, a sleeve and at least two sets of compression devices; the plugging end of the cable penetrates through the stress piece in the axial direction and then is plugged with the plugged end of the connecting terminal; the inner end of the sleeve is inserted into one end part of the straight plug, and the insertion end of the wiring terminal is inserted into the inner end of the sleeve; one end of the compressing device is connected with the outer wall of the straight plug, and the other end of the compressing device is connected with the sleeve. Compared with the prior art, the straight plug is made of materials better than silicon rubber, is convenient to use indoors with high pollution and complex environment, and can effectively prevent the product from being damaged by external force during operation; the structure is reasonable, the matching and positioning with the cable and the sleeve on the equipment are accurate, the current can be loaded to 1250A or below for through flow, and the safety and the reliability of the operation of a power supply line are ensured.

Description

Shielding type large-current high-voltage separable direct-plug cable connector

Technical Field

The utility model relates to a cable accessories technical field specifically indicates a separable cable connector that directly inserts of shielding type heavy current high pressure.

Background

The power line of power transmission in power generation, transmission and distribution of a power system needs to be realized through an overhead line or a power cable line, and the power cable needs to be connected through a cable accessory when being connected with the overhead line or power equipment. The power cable accessories are products for connecting cables with power transmission and distribution lines and related power distribution devices, generally refer to intermediate connection and terminal connection of various cables in the cable lines, and form a power transmission network together with the cables; the cable accessories are mainly based on the characteristics of the cable structure, not only can the performance of the cable be recovered, but also the extension of the cable length and the connection of the terminal can be ensured. The cable accessories play the roles of insulation, sealing, balancing the uneven electric field at the joint and the like in the process of cable connection.

The direct plug cable connector in the prior art is formed by pressing a silicon rubber material, the silicon rubber material has the characteristics of dirt resistance, aging resistance, strong hydrophobicity, corrosion resistance, ultraviolet resistance and the like, is suitable for manufacturing outdoor cold-shrinkable cable accessories, is used in outdoor environment with strong dust, rain, sunshine and ultraviolet ray, but has poor mechanical property, is not suitable for indoor environment with complex use environment, and the dielectric loss of the material is relatively high, the insulation material is easy to age in the circuit operation, the service life of the product is short, meanwhile, the assembly in the existing direct plug cable connector is positioned only by the silicon rubber steps, the cable connector has low hardness, cannot accurately position the installation position of a wiring terminal, leads to fuzzy positioning after product assembly, cannot ensure reliable connection of the cable and an equipment sleeve, and can only be used under a load of a small current below 200A.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcomings in the prior art, the utility model aims to provide a separable direct-plug cable connector of shielding type heavy current high pressure, its is rational in infrastructure, and the load is stable.

In order to achieve the above object, the utility model adopts the following technical scheme: a shielding type large-current high-voltage separable direct-plug cable connector comprises a straight plug, a stress piece and a wiring terminal which are arranged in an axial hole of the straight plug, a cable, a sleeve and at least two sets of pressing devices; the plugging end of the cable penetrates through the stress piece in the axial direction and then is plugged with the plugged end of the connecting terminal; the inner end of the sleeve is inserted into one end part of the straight plug, and the insertion end of the wiring terminal is inserted into the inner end of the sleeve; one end of the compressing device is connected with the outer wall of the straight plug, and the other end of the compressing device is connected with the sleeve.

Preferably, the straight plug is formed by integrally molding a conical cylinder and a cylinder, and a step part integrally molded with the cylinder is arranged on the outer wall of the cylinder; the inner wall of the straight plug is provided with an insulating layer, the inner wall of the insulating layer is provided with an inner shielding layer, namely, the straight plug is composed of three layers of materials, namely an outer shielding layer, the insulating layer and the inner shielding layer, and the straight plug is formed by injection molding of three layers of ethylene propylene diene monomer rubber made of different materials.

Preferably, the plugging end of the cable is inserted from the tail part of the conical barrel of the straight plug and penetrates through the conical barrel along the axial direction of the stress piece to be plugged with the plugged end of the wiring terminal; the inner end of the sleeve is inserted into the end part of the cylinder body, and the outer wall of the inner end is contacted with the insulating layer.

Preferably, the sleeve comprises a sleeve body, a conductive rod arranged in an axial hole of the sleeve body, a shielding net arranged in the sleeve body, a connecting disc arranged on the outer wall of the sleeve body and integrally formed with the sleeve body, and a connecting sheet with a connecting hole arranged on the surface of the connecting disc; the inner end of the sleeve body is inserted into the end part of the cylinder body; an axial blind hole is formed in the end part, located at the inner end of the body, of the conducting rod, and the insertion end of the wiring terminal is inserted into the axial blind hole.

Preferably, the compressing device comprises a fastener, a clamping piece provided with an opening, a connecting rod provided with a thread section, and a lock hook arranged at one end of the connecting rod, wherein the clamping piece is provided with a fastening hole for the thread section to pass through; the clamping piece is radially clamped on the outer wall of the cylinder along the cylinder and contacts with the end face, far away from the free end of the cylinder, of the step portion, the lock hook is connected with the connecting hole in the connecting piece, and the end portion of the thread section penetrates through the fastening hole and then is connected with the fastening piece.

Preferably, two conductive contact fingers are arranged in the axial blind hole and sleeved on the insertion end of the wiring terminal.

Preferably, a positioning ring is arranged in the inner shielding layer, and the edge of the positioning ring is connected with the inner wall of the inner shielding layer; a fixing ring is arranged on one surface of the positioning ring.

Preferably, the connecting terminal is formed by integrally molding a small-diameter section, a medium-diameter section and a large-diameter section; a first axial blind hole is formed in the large-diameter section, and the insertion end of the cable is inserted into the first axial blind hole; the positioning ring and the fixing ring are sleeved on the middle-diameter section; the two conductive contact fingers are sleeved on the small-diameter section; the small diameter section is positioned in an axial blind hole in the conducting rod.

Further, a sealing cylinder body is sleeved at the tail of the conical cylinder and is in lap joint with the cable; the sealing cylinder body is used for sealing the joint of the cable and the conical cylinder.

The beneficial technical effects are as follows: compared with the prior art, the straight plug is made of materials better than silicon rubber, is convenient to use indoors with high pollution and complex environment, and can effectively prevent the product from being damaged by external force during operation; the structure is reasonable, the matching and positioning with the cable and the sleeve on the equipment are accurate, the current can be loaded to 1250A or below for through flow, and the safety and the reliability of the operation of a power supply line are ensured.

Drawings

FIG. 1 is an exploded view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a partially enlarged schematic view of the present invention.

Detailed Description

In order to make the technical field better understand the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and embodiments.

As shown in fig. 1-3, the shielded high-current high-voltage separable direct-plug cable connector includes a straight plug 1, a stress member 2 and a terminal 3 disposed in an axial hole of the straight plug, a cable 4, a sleeve 5, and at least two sets of pressing devices 6.

Here, the straight plug 1 is formed by integrally molding a tapered cylinder 101 and a cylinder 102, and a stepped portion 103 integrally molded with the cylinder is provided on an outer wall of the cylinder; the inner wall of the straight plug is provided with an insulating layer 104, the inner wall of the insulating layer is provided with an inner shielding layer 105, namely the straight plug is composed of three layers of materials, namely an outer shielding layer 106, the insulating layer 104 and the inner shielding layer 105, and the insulating layer 104 is arranged on the inner wall of the outer shielding layer 106. The straight plug 1 is formed by injection molding of three layers of ethylene propylene diene monomer rubber made of different materials.

The ethylene propylene diene monomer rubber is more excellent in performance parameters such as tensile strength, tear strength, flex resistance, wear resistance, high-temperature acid resistance, alkali resistance, aqueous solution performance, elasticity and the like, and is longer in service life, and the ethylene propylene diene monomer rubber can be effectively prevented from being damaged by external force in operation when used indoors in a complex environment by utilizing the tear resistance and the better mechanical performance of the ethylene propylene diene monomer rubber material, is low in medium loss, good in heat dissipation and low in accident rate, and is suitable for separable cable connector products.

The plugging end 401 of the cable 4 is inserted from the tail part of the conical barrel 101 of the straight plug, passes through the stress piece 2 along the axial direction and then is plugged with the plugged end 301 of the wiring terminal 3; the inner end of the sleeve 5 is inserted into one end of the cylinder and the outer wall of the inner end is in contact with the insulating layer 104. The end of the sleeve 5 inserted in the cylinder is defined herein as the inner end.

The sleeve 5 is connected with the equipment or arranged on the equipment and comprises a sleeve body 501, a conducting rod 502 arranged in an axial hole of the sleeve body, a shielding net 503 arranged in the sleeve body, a connecting disc 504 arranged on the outer wall of the sleeve body and integrally formed with the sleeve body, and a plurality of connecting sheets 505 arranged on the surface of the connecting disc; a connecting hole 505a is arranged in the connecting sheet 505; the inner end of the sleeve is inserted into one end of the straight plug, that is, the inner end of the sleeve body 501 is inserted into the end of the cylinder; an axial blind hole 502a is formed in the end part of the conductive rod 502 positioned at the inner end of the body, and the insertion end 302 of the wiring terminal is inserted into the axial blind hole 502a, namely the insertion end 302 of the wiring terminal is inserted into the inner end of the sleeve.

The compressing device 6 comprises a fastener 601, a clamping piece 602 provided with an opening, a connecting rod 603 provided with a threaded section 603a, and a lock hook 604 arranged at one end of the connecting rod, wherein the clamping piece is provided with a fastening hole 602a for the threaded section to pass through; the clamping piece 602 is clamped on the outer wall of the cylinder body along the radial direction of the cylinder body 102 and is contacted with the end face, far away from the free end of the cylinder body, of the step part 103, the locking hook 604 is connected with the connecting hole 505a on the connecting piece, the end part of the threaded section 603a penetrates through the fastening hole 602a and then is connected with the fastening piece, and the connecting piece 505 can be tensioned through the locking hook 604 by rotating the fastening piece 601, so that the sleeve 5 and the straight plug 1 are fixed together. One end of the compressing device 6 is connected with the outer wall of the straight plug, i.e. the clamping member 602 on the compressing device is connected with the outer wall of the straight plug, and the other end of the compressing device 6 is connected with the sleeve, i.e. the locking hook 604 is connected with the connecting piece 505.

Two conductive contact fingers 7 are arranged in the axial blind hole 502a, and the two conductive contact fingers are sleeved on the insertion end 302 of the wiring terminal. The conductive contact finger 7 is abutted to the insertion end 302 of the wiring terminal, so that the electrical conduction between the conductive rod 502 and the wiring terminal 3 is ensured, and meanwhile, the elastic abutting of the conductive contact finger 7 and the wiring terminal 3 is utilized, the connection rigidity of the sleeve 5 and the wiring terminal 3 on the equipment is reduced, the problem of overlarge stress after the connection of the wiring terminal 3 is reduced, the accident that the conductive rod 502 of the sleeve 5 and the wiring terminal 3 are overheated or even burnt is effectively prevented, and the operation safety of the direct-plug cable connector under the heavy-current load is ensured.

A positioning ring 8 is arranged in the inner shielding layer 105, and the edge of the positioning ring is connected with the inner wall of the inner shielding layer; a retaining ring 9 is provided on one surface of the retaining ring.

Specifically, the terminal 3 is formed by integrally molding a small diameter section 303, a medium diameter section 304 and a large diameter section 305; a first axial blind hole is formed in the large-diameter section, and the plugging end 401 of the cable is plugged in the first axial blind hole; the positioning ring 8 and the fixing ring 9 are sleeved on the middle diameter section 304; the insertion end 302 of the wiring terminal is positioned at the tail end of the small-diameter section; the small diameter section is located in an axial blind bore 502a in the conductor bar.

The fixing ring 9 is used for fixing and locking the wiring terminal 3. The inserting end 302 of the wiring terminal 3 penetrates through the fixing ring 9 and is connected with the conducting rod 502 of the equipment sleeve 5, so that the wiring terminal 3 and the straight plug 1 are accurately and firmly positioned.

After the outer shielding layer 106 is grounded, a high-voltage electric field inside the straight plug 1 is shielded, the outer surface of the straight plug 1 is effectively kept at a zero potential, the safety of an operator is ensured, the insulating layer 104 is used for insulating and protecting a high-voltage electrified part, and the inner shielding layer 105 is used for uniformly balancing the electric fields of the wiring terminal 3, the conductor 402 in the cable and the sleeve 5 interface on the equipment. The structure of the straight plug 1 effectively ensures the interface performance, avoids layer gaps, reduces partial discharge to the maximum extent and ensures the reliable operation of a power supply system. The plug end 401 of the cable is located at the end of the conductor 402.

The tail part of the conical cylinder is also sleeved with a sealing cylinder body 10, and the sealing cylinder body is lapped with the cable 4; the sealing cylinder body is used for sealing the joint of the cable and the conical cylinder.

Although the present invention has been described in terms of embodiments, those skilled in the art will recognize that there are numerous variations and modifications of the present invention without departing from the spirit of the invention, and it is intended that the appended claims encompass such variations and modifications without departing from the spirit of the invention.

Claims

1. A shielding type large-current high-voltage separable direct-plug cable connector is characterized by comprising a straight plug, a stress piece and a wiring terminal which are arranged in an axial hole of the straight plug, a cable, a sleeve and at least two sets of pressing devices; the plugging end of the cable penetrates through the stress piece in the axial direction and then is plugged with the plugged end of the connecting terminal; the inner end of the sleeve is inserted into one end part of the straight plug, and the insertion end of the wiring terminal is inserted into the inner end of the sleeve; one end of the compressing device is connected with the outer wall of the straight plug, and the other end of the compressing device is connected with the sleeve.

2. The shielded large-current high-voltage separable straight-plug cable connector as recited in claim 1, wherein the straight plug is formed by integrally molding a tapered cylinder and a cylinder, and a step portion integrally molded with the cylinder is provided on an outer wall of the cylinder; an insulating layer is arranged on the inner wall of the straight plug, and an inner shielding layer is arranged on the inner wall of the insulating layer.

3. The shielded high-current high-voltage separable straight-plug cable connector as claimed in claim 2, wherein the plugging end of the cable is plugged from the tapered barrel tail part of the straight plug and is plugged with the plugged end of the connecting terminal after passing through the stress piece in the axial direction; the inner end of the sleeve is inserted into the end part of the cylinder body, and the outer wall of the inner end is contacted with the insulating layer.

4. The shielded large-current high-voltage separable direct-plug cable connector as recited in claim 3, wherein the sleeve comprises a sleeve body, a conductive rod disposed in an axial hole of the sleeve body, a shielding mesh disposed in the sleeve body, a connecting disc disposed on an outer wall of the sleeve body and integrally formed with the sleeve body, and a connecting sheet having a connecting hole disposed on a surface of the connecting disc; the inner end of the sleeve body is inserted into the end part of the cylinder body; an axial blind hole is formed in the end part, located at the inner end of the body, of the conducting rod, and the insertion end of the wiring terminal is inserted into the axial blind hole.

5. The shielded large-current high-voltage separable direct-plug cable connector as recited in claim 4, wherein the pressing means comprises a fastening member, a locking member having an opening, a connecting rod having a threaded section, and a locking hook disposed at one end of the connecting rod, the locking member having a fastening hole for the threaded section to pass through; the clamping piece is radially clamped on the outer wall of the cylinder along the cylinder and contacts with the end face, far away from the free end of the cylinder, of the step portion, the lock hook is connected with the connecting hole in the connecting piece, and the end portion of the thread section penetrates through the fastening hole and then is connected with the fastening piece.

6. The shielded high-current high-voltage separable direct-plug cable connector as recited in claim 4, wherein two conductive contact fingers are disposed in the axial blind hole, and the two conductive contact fingers are sleeved on the insertion end of the connection terminal.

7. The shielded high-current high-voltage separable direct-plug cable connector as recited in claim 6, wherein a positioning ring is disposed in the inner shielding layer, and an edge of the positioning ring is connected to an inner wall of the inner shielding layer; a fixing ring is arranged on one surface of the positioning ring.

8. The shielded high-current high-voltage separable direct-plug cable connector as recited in claim 7, wherein the terminal block is integrally formed by the small-diameter section, the medium-diameter section and the large-diameter section; a first axial blind hole is formed in the large-diameter section, and the insertion end of the cable is inserted into the first axial blind hole; the positioning ring and the fixing ring are sleeved on the middle-diameter section; the two conductive contact fingers are sleeved on the small-diameter section; the small diameter section is positioned in an axial blind hole in the conducting rod.

9. The shielded large-current high-voltage separable direct-plug cable connector as claimed in claim 2, wherein a sealing cylinder is further sleeved at the tail of the tapered cylinder, and the sealing cylinder is overlapped with the cable; the sealing cylinder body is used for sealing the joint of the cable and the conical cylinder.