CN219917641U

CN219917641U - Bus connector

Info

Publication number: CN219917641U
Application number: CN202321273776.1U
Authority: CN
Inventors: 刘伟强; 宗志辉
Original assignee: Shenzhen Shendian Electric Power Equipment Development Co ltd
Current assignee: Shenzhen Shendian Electric Power Equipment Development Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-27
Anticipated expiration: 2033-05-24

Abstract

The utility model provides a bus connector which comprises an epoxy base, a copper connecting rod, a bearing bush and a cross plug. The epoxy base can be designed into different lengths according to actual matching requirements; the copper connecting rod is a current carrying conductor, and the length of the copper connecting rod is adjusted along with the change of the epoxy base; the bearing bush electrically connects the copper connecting rods at the two ends, so that effective transmission of electric energy is realized; the cross plug carries out electric field treatment, insulating sealing and shielding grounding on the connection position, and can be designed into a symmetrical structure or a special-shaped structure according to actual matching requirements. The bus connector can solve the problem of bus connection of the miniaturized 1250A coal mine power distribution cabinet, simultaneously meet the explosion-proof requirement, solve the problem that the buses cannot be connected due to dislocation, have small occupied space and realize intrinsic safety.

Description

Bus connector

Technical Field

The utility model relates to a connector, in particular to a bus connector for a 1250A small-sized power distribution cabinet for a coal mine.

Background

With the development of society, electricity is comprehensively used in various industries. In the field of power transmission and distribution, electricity is transmitted from a power plant to a user as energy source to distribute electric energy, and the traditional power distribution cabinet is characterized in that bus connection positions are mostly positioned on the top or the side wall of the cabinet, the positions are parallel, and the connection mode is simple and reliable; in the power distribution of the coal mine, the design of the product is required to realize intrinsic safety in consideration of the specificity of the use environment, the matching surface has an explosion-proof requirement, the design of the product is required to be fully shielded, the design of the cabinet is required to be miniaturized in consideration of the limited transportation space of the upper and lower wells, the design of the cabinet is required to be maintenance-free in consideration of the operability of operation inspection after operation, the design of the cabinet is required to be maintenance-free, the design of the cabinet is usually of a double-layer structure in consideration of the condition that the power distribution of the coal mine is required to be loaded, the hardware is of 1250A high-current design, the bus connection position is of a non-standard structure with different axes and different surfaces, and the traditional bus cannot meet the requirements.

In view of the above, whether a 1250A bus connector for coal mines can be designed, so that the connector can adapt to a miniaturized cabinet body, meet the explosion-proof requirement, achieve 1250A high-current design, adapt to the condition that bus connection positions are misplaced, realize intrinsic safety and occupy small space, and is very significant.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a bus connector, which comprises an epoxy base, a copper connecting rod, a bearing bush and a cross plug, wherein the epoxy base is provided with a copper connecting rod; the epoxy base can be designed into different lengths according to actual matching requirements; the copper connecting rod is a current carrying conductor, and the length of the copper connecting rod is adjusted along with the change of the epoxy base; the bearing bush electrically connects the copper connecting rods at the two ends, so that effective transmission of electric energy is realized; the cross plug performs electric field treatment, insulating sealing and shielding grounding on the connection position; when bus connection is carried out, three directions are left, right and rotation positions respectively, and the left and right connection is realized through the epoxy base and the copper connecting rod; the connection of the rotation position is realized through the cooperation of an epoxy base, a copper connecting rod, a bearing bush and a cross plug, and the connection of the rotation position realizes 360-degree full-angle universal use; the part of the copper connecting rod extending out of the epoxy base comprises a connecting surface and a soft conductor, wherein the connecting surface is connected with the soft conductor, the soft conductor is made of copper, and the surface is not subjected to electroplating treatment.

As a further improvement of the utility model, the connecting surface is connected with the soft conductor by adopting a friction welding, silver soldering or exothermic welding connection mode; the soft conductor is woven by a plurality of soft wires, the diameter of a single wire is 0.1-0.15 mm, and the shape of the single wire is cylindrical; the end part of the soft conductor is subjected to dipping treatment, the dipping depth is 3-5 mm, and the dipping material is copper or silver water.

As a further improvement of the utility model, the inner side end part of the copper connecting rod is provided with a chamfer, the chamfer size is 15-45 degrees, and the chamfer size is 3-10 mm; the contact position of the copper connecting rod and the epoxy base is provided with anti-skid grooves, the number of the anti-skid grooves is 1-4, the width of the anti-skid grooves is 2-5 mm, and the depth of the anti-skid grooves is 0.5-2 mm; the end part of the copper connecting rod is designed with a cylindrical electric connection matching surface, and the size of the cylindrical electric connection matching surface is 10-30 mm; the size of the epoxy base is larger than that of the epoxy base, and the size of the part of the epoxy base is electrically connected and matched with the bearing bush.

As a further improvement of the utility model, the cross plug comprises an inner shielding layer, an insulating layer and an outer shielding layer; the inner shielding layer structure is in a cross barrel shape and is used for balancing electric field distribution of a conductor connecting position, the design thickness is preferably 1.5-3.5 mm, the end fillet R1-R2.5 mm is made of silicon rubber or ethylene propylene diene monomer rubber, the hardness is preferably HA 45-50, and the volume resistivity is less than 100 Ω & cm; the insulating layer is cross-shaped and comprises an insulating surface matched with a cylindrical insulating matching surface of the epoxy base, a conical surface in insulating matching with the sleeve and a conical surface in insulating matching with the rear plug, the size of the matching surface is designed according to the actual voltage grade, the inner creepage distance and the like, the insulating thickness is preferably 8-11 mm, the insulating layer is made of silicon rubber or ethylene propylene diene monomer rubber, the hardness is preferably HA 35-55, and the breakdown strength is more than or equal to 25kV/mm; the outer shielding layer comprises an integrated stress cone, a grounding position and a feeding hole, wherein the integrated stress cone is used for evacuating an electric field at the end part when the epoxy base is connected, the grounding position is used for electrically connecting the cross plug with the grounding system, the feeding hole is an injection hole in the production of the insulating layer, the outer shielding layer is made of silicon rubber or ethylene propylene diene monomer rubber, and semi-conductive ink can be used for spraying/brushing, so that the reliable outer shielding and safe grounding can be realized, and the resistance between any two points on the surface of the outer shielding layer is less than 5000 omega.

As a further improvement of the utility model, the matching position of the bearing bush and the soft conductor is provided with an inner groove.

As a further improvement of the utility model, the inner grooves are equilateral triangles with 0.5-1.5 mm side length, the number of the inner grooves is 3-8, and the adjacent intervals are equal to the side length.

As a further improvement of the utility model, the epoxy base and the copper connecting rod are molded together in a mold, and are an integral structural member when in use; the epoxy base is made of epoxy resin or ethylene propylene rubber, the volume resistivity is larger than 1013 Ω & m, the dielectric loss is smaller than 1 x 10 < -3 >, and the breakdown strength is larger than 23kV/mm; the copper connecting rod is made of T2 copper, silver is plated on the surface of the copper connecting rod for preventing oxidation caused by repeated plugging, and the thickness of a plating layer is more than 3um.

As a further improvement of the utility model, the outer part of the epoxy base is provided with a fixed step, and the position of the fixed step is sprayed or brushed with a semiconductive layer; the outer side of epoxy base is provided with the outer conical surface, and the inboard is provided with the internal cone, and wherein the external conical surface carries out interference fit with the cross plug and realizes the combination insulation, and the internal cone carries out the combination insulation with the side busbar connector of many cabinet, and its size design all adopts interference fit, and tapering and interference magnitude are confirmed according to voltage class, interior creepage distance, operational environment, experimental requirement.

As a further improvement of the utility model, the end part of the epoxy base is designed with a cylindrical insulating matching surface, and the size of the cylindrical insulating matching surface is in interference fit with the special-shaped cross plug; the corner of the epoxy base is subjected to fillet treatment, the size of the fillet is R2-R5 mm, the fillet treatment is carried out at the position unsuitable for the fillet treatment, and the size range of the fillet is 2-5 degrees.

As a further improvement of the utility model, the inside of the bearing bush is provided with a horizontal round hole and a vertical round hole, wherein the horizontal round hole is used for connecting copper connecting rods at two ends, the matching lap joint length of the bearing bush and the copper connecting rods is 8-15 mm, and the diameters of the matching positions are consistent, so that reliable round surface connection is realized; the vertical round hole is used for connecting the sleeve and the rear plug, and the size of the vertical round hole is adjusted according to the types of the sleeve and the rear plug.

The beneficial effects of the utility model are as follows:

the bus connector can solve the problem of bus connection of the miniaturized 1250A coal mine power distribution cabinet, simultaneously meet the explosion-proof requirement, solve the problem that the buses cannot be connected due to dislocation, have small occupied space and realize intrinsic safety.

Drawings

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

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic cross-sectional mating view of the present utility model;

FIG. 4 is a detail view of the epoxy mount and copper tie bar of the present utility model;

fig. 4A is a schematic drawing that marks the general locations of the cylindrical insulating mating surface 104 and the cylindrical electrical connection mating surface 203;

FIG. 5 is a detail view of the bushing assembly of the present utility model;

FIG. 5A is a schematic drawing showing the approximate location of the mating lap length of the bearing shell 3 and copper connecting rod;

FIG. 6 is a detail view of the bearing shell toothed fit of the present utility model;

the double arrow in fig. 6A shows the position of the connection face 204;

FIG. 7 is a cross-plug cross-sectional view of the present utility model;

fig. 8 is a cross-sectional view of a shaped cross-shaped plug of the present utility model.

The names of the components in the figure are as follows:

epoxy base 1, copper connecting rod 2, axle bush 3, cross plug 4, fixed step 101, outer conical surface 102, interior conical surface 103, cylindrical insulating mating surface 104, chamfer 201, anti-slip groove 202, cylindrical electrical connection mating surface 203, connection surface 204, flexible conductor 205, interior recess 301, inner shielding layer 41, insulating layer 42, outer shielding layer 43, stress cone 44, ground place 45, feed port 46, insulating surface 401, conical surface 402 for insulating mating with the sleeve, conical surface 403 for insulating mating with the back plug.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, a busbar connector (particularly a 1250A busbar connector for coal mines) comprises an epoxy base 1, a copper connecting rod 2, a bearing bush 3 and a cross plug 4. The epoxy base 1 can be designed into different lengths according to actual matching requirements; the copper connecting rod 2 is a current carrying conductor, and the length is adjusted along with the change of the epoxy base 1; the bearing bush 3 electrically connects the copper connecting rods 2 at two ends, so that effective transmission of electric energy is realized; the cross plug 4 performs electric field treatment, insulation sealing and shielding grounding on the connection position, and the cross plug 4 can be designed into a symmetrical structure or a special-shaped structure according to actual matching requirements.

Referring to fig. 1 and 2, the 1250A bus connector for coal mine of the present utility model has three directions, namely left, right and rotation positions, when bus connection is performed, the left and right connection is realized through the epoxy base 1 and the copper connecting rod 2; the connection of the rotation position is realized by the cooperation of the epoxy base 1, the copper connecting rod 2, the bearing bush 3 and the cross plug 4, and the structure of the utility model can realize 360-degree all-angle universal connection, can meet all-angle connection, is applicable to various special-shaped cabinets and custom scenes, and has universality.

Referring to fig. 4, the epoxy base 1 and the copper connecting rod 2 are molded together in a mold, and are formed into an integral structure in use.

Referring to fig. 4, the epoxy base 1 is made of epoxy resin or ethylene propylene rubber, and has volume resistivity of more than 10 ¹³ Omega-m dielectric loss is less than 1 x 10 ^-3 The breakdown strength is more than 23kV/mm; the copper connecting rod 2 is made of T2 copper, silver is plated on the surface of the copper connecting rod for preventing oxidation caused by repeated plugging, and the thickness of a plating layer is more than 3um.

Referring to fig. 3 and 4, in order to facilitate installation and fixation, a fixing step 101 is provided outside the epoxy base 1, and its design size can be determined according to actual explosion-proof requirements, installation form and stress conditions; in order to realize the combined insulation of the multi-cabinet, an outer conical surface 102 is arranged on the outer side of the epoxy base 1, an inner conical surface 103 is arranged on the inner side, wherein the outer conical surface 102 is in interference fit with the special-shaped cross plug 4 in the utility model to realize the combined insulation, the inner conical surface 103 is in combined insulation with a side bus connector of the multi-cabinet, the size design of the inner conical surface 103 is in interference fit, and the taper and the interference are determined according to the voltage level, the inner creepage distance, the use environment and the test requirement; in order to realize good inner shielding when being matched with the special-shaped cross plug 4, a cylindrical insulating matching surface 104 is designed at the end part of the epoxy base 1, and the size of the cylindrical insulating matching surface is in interference fit with the special-shaped cross plug 4; in order to prevent trapped air during production and molding, the corner of the epoxy base 1 can be subjected to fillet treatment, the fillet size is preferably R2-R5 mm, the corner can be subjected to chamfering treatment at a position unsuitable for fillet treatment, and the chamfer size is preferably 2-5 degrees.

Referring to fig. 4, in order to improve the safety performance in the polluted environment and prevent creepage or personal injury, a semiconductive layer may be sprayed/brushed on the exposed insulating outer surface of the epoxy base 1 to make the electric field distribution stable and reliable, and particularly, the semiconductive layer is sprayed/brushed on the fixing step 101 to achieve reliable grounding of the insulating outer surface semiconductive layer.

Referring to fig. 4, in order to facilitate the installation of multiple cabinets, the inner side end of the copper connecting rod 2 is provided with a chamfer 201, the chamfer size is preferably 15-45 degrees, and the chamfer size is preferably 3-10 mm; in order to prevent the epoxy base 1 and the copper connecting rod 2 from slipping due to stress when in installation and use, anti-skid grooves 202 can be arranged at the contact position of the copper connecting rod 2 and the epoxy base 1, the number of the anti-skid grooves 202 is preferably 1-4, the width of the anti-skid grooves is preferably 2-5 mm, the depth is preferably 0.5-2 mm, and the position is preferably an area with large insulation margin; in order to realize reliable transmission of bus electric connection, a cylindrical electric connection matching surface 203 is designed at the end part of the copper connecting rod 2, the size of the cylindrical electric connection matching surface is larger than that of the epoxy base, the size of the protruding part is matched with the electric connection of the bearing bush 3, and the position of the cylindrical electric connection matching surface 203 is preferably phi 32mm in diameter in order to meet 1250A of overcurrent; for easy installation, a chamfer is arranged at the outer end part of the copper connecting rod, and the chamfer size is preferably C0.5-C2 mm.

Referring to fig. 3 and 4, the lengths of the cylindrical insulating mating surface 104 and the cylindrical electrical connection mating surface 203 can be designed and adjusted according to the space in the cabinet, and the size of the cylindrical electrical connection mating surface 203 is preferably 10-30 mm.

Referring to fig. 5, in order to match the bearing bush with the detailed view, the bearing bush 3 compresses and contacts the copper connecting rods 2 at two ends to realize electrical connection. The bearing bush 3 shown in figure 5 is internally provided with a horizontal round hole and a vertical round hole, wherein the horizontal round hole is used for connecting the copper connecting rods 2 at two ends, the matching lap joint length of the bearing bush 3 and the copper connecting rods 2 is preferably 8-15 mm, and the diameters of the matching positions are consistent, so that reliable round surface connection is realized; the vertical round hole is used for connecting the sleeve and the rear plug, and the size of the vertical round hole can be adjusted according to the types of the sleeve and the rear plug.

Because of the deviation of processing, installation and construction, the actual matching size and the design size of the bus can come in and go out, and even reliable connection can not be realized under partial conditions, in order to solve the difficult problem, the copper connecting rod 2 and the bearing bush 3 are subjected to modification design. Referring to fig. 6, the portion of the copper connecting rod 2 extending out of the epoxy base 1 includes a connecting surface 204 and a soft conductor 205, wherein the connecting surface 204 can adopt a connection mode such as friction welding, silver soldering, exothermic welding, etc. to realize reliable connection between the soft conductor 205 and the copper connecting rod 2, burrs generated during welding can be eliminated through post-treatment, and welding quality can be visually detected through X-ray imaging, and can also be verified through a high-current test. The flexible conductor 205 is woven by a plurality of flexible wires, the shape of the flexible conductor is cylindrical, the diameter of a monofilament is preferably 0.1-0.15 mm, the material is preferably T2 copper, the surface is not subjected to electroplating treatment, and the reason why the electroplating treatment is not performed is that the plating material is silver or tin generally, the melting point of the plating material is far lower than that of copper, the plating material can be melted during welding, and the welding effect is affected, so that the flexible conductor is woven by the T2 copper, and the surface is not required to be electroplated. The end of the soft conductor 205 is impregnated with copper/silver water to a depth of 3-5 mm, and the end of the soft conductor 205 is impregnated to a fixed shape and stable in structure. The matching position of the bearing bush 3 and the soft conductor 205 is provided with the inner grooves 301 so as to compress the soft conductor 205 and realize reliable connection, the size of the inner grooves 301 is preferably 0.5-1.5 mm equilateral triangle, the number is preferably 3-8, and the adjacent spacing is equal to the side length. Because of the design of the flexible conductor 205, a certain degree of bending can be performed during connection, effective connection in a dislocation state can be realized, and the installation problem with large deviation can be solved.

Referring to fig. 7, a cross plug is shown in cross section, comprising an inner shielding layer 41, an insulating layer 42, and an outer shielding layer 43. The inner shielding layer 41 is in a cross barrel shape and is used for balancing an electric field at a conductor connecting position, the design thickness is preferably 1.5-3.5 mm, the end fillet R1-R2.5 mm is made of silicon rubber or ethylene propylene diene monomer rubber, the hardness is preferably HA 45-50, and the volume resistivity is less than 100 Ω & cm; the insulating layer 42 is cross-shaped and comprises an insulating surface 401 matched with a cylindrical insulating matching surface 104 of the epoxy base 1, a conical surface 402 in insulating matching with a sleeve and a conical surface 403 in insulating matching with a rear plug, the size of the matching surface is designed according to the actual voltage grade, the inner creepage distance and the like, the insulating thickness is preferably 8-11 mm, the material is silicon rubber or ethylene propylene diene monomer rubber, the hardness is preferably HA 35-55, and the breakdown strength is more than or equal to 25kV/mm; the outer shielding layer 43 comprises an integral stress cone 44, a grounding position 45 and a feeding hole 46, wherein the integral stress cone 44 is used for dispersing an end electric field when the epoxy base 1 is connected, the grounding position 45 is used for electrically connecting a cross plug with a grounding system, the feeding hole 46 is an injection hole when the insulating layer 42 is produced, the outer shielding layer 43 is made of silicon rubber or ethylene propylene diene monomer rubber, and semi-conductive ink can be used for spraying/brushing, so that the reliable outer shielding and safe grounding are realized, and the resistance between any two points on the surface of the outer shielding layer is less than 5000 omega.

Referring to fig. 7, the cross plug is of a symmetrical structure, and is suitable for occasions with large space in the cabinet; referring to fig. 8, the cross plug is of a special-shaped structure, and is suitable for occasions with narrow space in the cabinet, for example, the special-shaped structure of fig. 8 can be designed to be symmetrical, and a large amount of space can be directly saved.

Referring to fig. 8, a cross-sectional view of a special-shaped cross plug is shown, and compared with the cross plug of fig. 7, an insulation surface 401 with one end being matched with a cylindrical insulation matching surface 104 of the epoxy base 1 is upgraded to be directly matched with an outer conical surface 102 of the epoxy base 1, so that the space in a cabinet can be greatly reduced, and when the space is particularly narrow, the insulation surface 401 in fig. 7 can be upgraded to be the insulation surface 401 in fig. 8, so that the space of the cylindrical insulation matching surface 104 of the epoxy base 1 can be completely omitted.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. A bus connector, characterized in that: comprises an epoxy base (1), a copper connecting rod (2), a bearing bush (3) and a cross plug (4); the epoxy base (1) can be designed into different lengths according to actual matching requirements; the copper connecting rod (2) is a current-carrying conductor, and the length of the copper connecting rod is adjusted along with the change of the epoxy base (1); the bearing bush (3) is used for electrically connecting the copper connecting rods (2) at the two ends, so that effective transmission of electric energy is realized; the cross plug (4) carries out electric field treatment, insulating sealing and shielding grounding on the connection position; when bus connection is carried out, three directions are left, right and rotation positions respectively, and the left and right connection is realized through the epoxy base (1) and the copper connecting rod (2); the connection of the rotation position is realized through the cooperation of the epoxy base (1), the copper connecting rod (2), the bearing bush (3) and the cross plug (4), and the connection of the rotation position realizes 360-degree full-angle universal use; the part of the copper connecting rod (2) extending out of the epoxy base (1) comprises a connecting surface (204) and a soft conductor (205), wherein the connecting surface (204) is connected with the soft conductor (205), the soft conductor (205) is made of copper, and the surface is not subjected to electroplating treatment.

2. The bus bar connector of claim 1, wherein: the connecting surface (204) is connected with the soft conductor (205) by adopting a friction welding, silver soldering or exothermic welding connection mode; the soft conductor (205) is woven by a plurality of soft wires, the diameter of a single wire is 0.1-0.15 mm, and the shape of the single wire is cylindrical; the end part of the soft conductor (205) is subjected to dipping treatment, the dipping depth is 3-5 mm, and the dipping material is copper or silver water.

3. The bus bar connector of claim 1, wherein: the inner side end part of the copper connecting rod (2) is provided with a chamfer (201), the chamfer size is 15-45 degrees, and the chamfer size is 3-10 mm; the contact position of the copper connecting rod (2) and the epoxy base (1) is provided with anti-skid grooves (202), the number of the anti-skid grooves (202) is 1-4, the width of the anti-skid grooves is 2-5 mm, and the depth is 0.5-2 mm; the end part of the copper connecting rod (2) is provided with a cylindrical electric connection matching surface (203), and the size of the cylindrical electric connection matching surface (203) is 10-30 mm; the size of the epoxy base is larger than that of the epoxy base, and the size of the part of the epoxy base is electrically connected and matched with the bearing bush (3).

4. The bus bar connector of claim 1, wherein: the cross plug (4) comprises an inner shielding layer (41), an insulating layer (42) and an outer shielding layer (43); the inner shielding layer (41) is in a cross barrel shape and is used for balancing electric field distribution of conductor connection positions, the design thickness is 1.5-3.5 mm, the end fillets R1-R2.5 mm are made of silicon rubber or ethylene propylene diene monomer rubber, the hardness is HA 45-50, and the volume resistivity is less than 100 Ω & cm; the insulating layer (42) is cross-shaped and comprises an insulating surface (401) matched with a cylindrical insulating matching surface (104) of the epoxy base (1), a conical surface (402) in insulating fit with the sleeve and a conical surface (403) in insulating fit with the rear plug, the size of the matching surface is designed according to the actual voltage grade and the internal creepage distance, the insulating thickness is 8-11 mm, the material is silicon rubber or ethylene propylene diene monomer rubber, the hardness is HA 35-55, and the breakdown strength is more than or equal to 25kV/mm; the outer shielding layer (43) comprises an integrated stress cone (44), a grounding position (45) and a feed inlet (46), wherein the integrated stress cone (44) is used for evacuating an electric field at the end part when the epoxy base (1) is connected, the grounding position (45) is used for electrically connecting a cross plug with a grounding system, the feed inlet (46) is an injection inlet when the insulating layer (42) is produced, the outer shielding layer (43) is made of silicon rubber or ethylene propylene diene monomer rubber, and semi-conductive ink is adopted for spraying/brushing so as to realize reliable outer shielding and safe grounding, and the resistance between any two points of the surface of the outer shielding layer is less than 5000 omega.

5. The bus bar connector of claim 1, wherein: the bearing bush (3) is provided with an inner groove (301) at the matching position with the soft conductor (205).

6. The bus bar connector of claim 5, wherein: the inner grooves (301) are equilateral triangles with side lengths of 0.5-1.5 mm, the number of the inner grooves is 3-8, and the adjacent intervals are equal to the side lengths.

7. The bus bar connector of claim 1, wherein: the epoxy base (1) and the copper connecting rod (2) are molded together in a mold, and are an integral structural member when in use; the epoxy base (1) is made of epoxy resin or ethylene propylene rubber, the volume resistivity is larger than 1013 Ω & m, the dielectric loss is smaller than 1 x 10 < -3 >, and the breakdown strength is larger than 23kV/mm; the copper connecting rod (2) is made of T2 copper, and is plated with silver on the surface for preventing oxidation caused by repeated plugging and unplugging, and the thickness of the plating layer is more than 3um.

8. The bus bar connector of claim 1, wherein: a fixed step (101) is arranged outside the epoxy base (1), and a semiconductive layer is sprayed or brushed at the position of the fixed step (101); the outside of epoxy base (1) is provided with outer conical surface (102), and the inboard is provided with interior conical surface (103), and wherein outer conical surface (102) carries out interference fit with cross plug (4) and realizes the combination insulation, and interior conical surface (103) carries out the combination insulation with the side busbar connector of many cabinet, and its size design all adopts interference fit, and tapering and interference volume are confirmed according to voltage class, interior creepage distance, operational environment, experimental requirement.

9. The bus bar connector of claim 1, wherein: the end part of the epoxy base (1) is designed with a cylindrical insulating matching surface (104), and the size of the cylindrical insulating matching surface is in interference fit with the special-shaped cross plug (4); the corner of the epoxy base (1) is subjected to fillet treatment, the fillet size R2-R5 mm, and the chamfering treatment is carried out at the position unsuitable for the fillet treatment, wherein the chamfer size range is 2-5 degrees.

10. The bus bar connector of claim 1, wherein: the bearing bush (3) is internally provided with a horizontal round hole and a vertical round hole, wherein the horizontal round hole is used for connecting copper connecting rods (2) at two ends, the matching lap joint length of the bearing bush (3) and the copper connecting rods is 8-15 mm, and the diameters of the matching positions are consistent, so that reliable round surface connection is realized; the vertical round hole is used for connecting the sleeve and the rear plug, and the size of the vertical round hole is adjusted according to the types of the sleeve and the rear plug.