CN214044995U

CN214044995U - Grounding structure of high-voltage cable connector

Info

Publication number: CN214044995U
Application number: CN202022581815.7U
Authority: CN
Inventors: 刘家辰; 何文明; 王辉; 瞿金山; 冯岗
Original assignee: Shanghai Sanyuan Cable Accessories Co ltd
Current assignee: Shanghai Sanyuan Cable Accessories Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-24
Anticipated expiration: 2030-11-10

Abstract

The utility model relates to a high tension cable connects's ground structure is applied to the prefabricated high voltage insulation cable joint of combination, its characterized in that: the combined prefabricated high-voltage insulated cable joint comprises two sections of cables which are fixedly connected through epoxy sleeves, stress cones are sleeved at joint ends of the two sections of cables respectively and are fixed by spring brackets respectively, the epoxy sleeves are arranged at cable joints, lower electrodes are arranged on the outer sides of the stress cones at two ends in the epoxy sleeves respectively in an annular mode, contacts which are in contact with high-voltage electrodes arranged inside the epoxy sleeves to achieve a passage function are arranged on end cable cores of the two sections of cables respectively, the lower electrodes are sequentially connected with copper nuts and PE copper shells through connecting rods, a copper stud is further arranged on one copper nut body connected with the two lower electrodes, the copper stud extends out of the epoxy sleeves, the end portions of the copper studs are tightly attached to the PE copper shells arranged on the outer sides of the epoxy sleeves, the PE copper shells are grounded, and an insulating tape is wound on one side, which exceeds the length of the PE copper shells, of the epoxy sleeves.

Description

Grounding structure of high-voltage cable connector

Technical Field

The utility model relates to a high tension cable connects, especially discloses a high tension cable connects's ground structure, is applicable to the ground connection that the prefabricated high voltage insulation cable of combination connects.

Background

The combined prefabricated joint is different from a conventional joint structure, the combined prefabricated joint uses an epoxy sleeve to connect two sections of cables, the two sections of cables are sleeved into a stress cone and a contact and are inserted into the epoxy sleeve after being processed, the stress cone is fixed by spring brackets at two ends, and the through-flow function is realized through the contact and an epoxy internal high-voltage electrode. The lower electrode is arranged in the epoxy sleeve, the copper shielding layer is arranged on the outer surface of the epoxy sleeve, and the PE copper shell is coated on the outermost layer of the cable joint.

For guaranteeing the prefabricated high voltage insulation cable joint safety and stability operation of combination, the copper shield layer that epoxy casing pipe surface set up, PE copper shell and bottom electrode need ground connection to be handled, there is certain clearance between PE copper shell and the copper shield layer among the prior art, use the copper mesh to connect copper shield layer and PE copper shell usually, the spring bracket at both ends cable joint department both ends links together the inside bottom electrode of epoxy casing pipe and the outside PE copper shell of cladding through the bolt, make PE copper shell, copper shield layer and bottom electrode three are linked together, not only connect the reliability relatively poor, there is the potential safety hazard, and the installation technology is loaded down with trivial details, it is long consuming time.

In the grounding structure in the prior art, the epoxy sleeve and the PE copper shell are only connected through the copper mesh, namely, grounding is realized through the copper mesh, but the copper mesh is not firm in connection, and when the cable is vibrated by external force, the copper mesh has the possibility of loosening, so that potential safety hazards exist.

Disclosure of Invention

The utility model aims at solving prior art's defect, design a high tension cable joint's ground structure, improve the ground structure who makes up prefabricated high tension cable joint, abandoned current copper mesh ground structure, saved the step of winding copper mesh, simplified mounting process, still guaranteed ground connection reliably, make the cable operation safer.

The utility model discloses a realize like this: the utility model provides a grounding structure of high tension cable connects, is applied to the prefabricated high voltage insulation cable of combination and connects its characterized in that: the combined prefabricated high-voltage cable joint comprises two sections of cables which are fixedly connected through epoxy sleeves, stress cones are respectively sleeved at joint ends of the two sections of cables and are respectively fixed by spring brackets, the epoxy sleeves are arranged at the cable joints, and the epoxy sleeves are poured at the cable joints in a pouring mode. The outer sides of stress cones at two ends in the epoxy sleeve are respectively and annularly provided with a lower electrode, the end cable core wires of two sections of cables are respectively provided with a contact, the contact is contacted with a high-voltage electrode arranged in the epoxy sleeve to realize a passage function, the outermost layer of the cable joint is coated with a PE copper shell, the length of the PE copper shell is less than that of the epoxy sleeve, the outer surface of the epoxy sleeve provided with the PE copper shell is also provided with a copper shielding layer, the outer surface of the epoxy sleeve exceeding the length of the PE copper shell is wrapped with an insulating tape, the lower electrode is communicated with one end of a copper nut through a connecting rod, the other end of the copper nut is fixedly connected with the PE copper shell coated at the cable joint, a copper stud is arranged on a copper nut body connected with the lower electrode at one side provided with the copper shielding layer, the copper stud extends out of the epoxy sleeve, and the end part of the copper stud is tightly attached to the PE copper shell at the outer side of the epoxy sleeve, the PE copper shell is grounded.

The lower electrode, the connecting rod and the copper nut are coaxially arranged with the cable after being connected and fixedly connected with the PE copper shell coated at the cable joint through bolts, and the copper stud arranged on the copper nut radially extends out of the epoxy sleeve along the cable. And the part of the copper stud extending out of the surface of the epoxy sleeve is sprayed with semi-conductive paint and wrapped with copper foil.

The utility model has the advantages that: the utility model discloses a copper double-screw bolt realizes the connection design between copper shield layer and PE copper shell, the bottom electrode, can guarantee that the copper shield layer that epoxy sleeve pipe surface set up realizes firm ground electrical connection with the inside bottom electrode of epoxy sleeve pipe and the PE copper shell of the outside cladding of cable joint department, and the position spraying that the copper double-screw bolt exposes the epoxy sleeve pipe body has semi-conductive paint and winds the package copper foil, can strengthen its electric conductivity and connection reliability. Through PE copper shell ground connection the utility model discloses can realize the synchronous ground connection of copper shield layer and bottom electrode to the copper shield layer on epoxy casing surface is reliable with the inside bottom electrode ground connection of epoxy sleeve, effectively guarantees cable joint's security and stability, has saved the mounting process of winding copper mesh among the prior art simultaneously, has saved installation time.

Drawings

Fig. 1 is the utility model discloses a prefabricated high tension cable joint of combination sectional structure sketch map.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

In the figure: 1. a cable; 2. A spring bracket; 3. A stress cone; 4. An epoxy sleeve; 5. A contact; 6. A PE copper shell; 7. A high voltage electrode; 8. A copper shield layer; 9. A lower electrode; 21. Copper screw caps; 22. A copper stud; 23. A connecting rod.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

According to attached drawing 1 and attached drawing 2, the utility model relates to a grounding structure of high tension cable connects is applied to the ground connection that the prefabricated high voltage insulation cable of combination connects. The combined prefabricated high-voltage insulated cable joint comprises two sections of cables 1 which are fixedly connected through epoxy sleeves 4, stress cones 3 are respectively sleeved at joint ends of the two sections of cables 1 and are respectively fixed through spring brackets 2, then the epoxy sleeves 4 are formed at the cable joints in a pouring mode, lower electrodes 9 are respectively arranged on the outer sides of the stress cones 3 at two ends in the epoxy sleeves 4 in an annular mode while pouring is carried out, contacts 5 are respectively arranged on end cable cores of the two sections of cables 1, and a path function is realized through the contact of the contacts 5 and high-voltage electrodes 7 arranged inside the epoxy sleeves 4. The outer surface of the epoxy sleeve 4 is provided with a copper shielding layer 8, the outermost layer of the cable joint is coated with a PE copper shell 6, and the PE copper shell is a copper shell for the cable, the outer surface of which is coated with a PE layer.

The lower electrode 9 is communicated with one end of a copper nut 21 through a connecting rod 23 and is coaxially arranged with the cable, and the other end of the copper nut 21 is fixedly connected with a PE copper shell 6 coated at a cable joint through a bolt. The copper nut 21 body is provided with a copper stud 22, the copper stud 22 radially extends out of the main body of the epoxy sleeve 4 along a cable, the end part of the copper stud is tightly attached to the PE copper shell 6 outside the epoxy sleeve 4, the surface of the epoxy sleeve 4 inside the PE copper shell 6 is provided with a copper shielding layer 8, and the surface of the epoxy sleeve 4 exposed out of the other end of the PE copper shell 6 is not provided with a copper shielding layer but is wrapped with an insulating tape. The copper stud 22 is provided mainly for realizing reliable electrical connection between the copper shielding layer 8 and the PE copper shell 6, and the lower electrode 9 can be electrically connected to the PE copper shell through the connecting rod 23 and the copper nut 21, so that the copper stud 22 only needs to be provided at the end of the PE copper shell 6 where the copper shielding layer is provided. In order to ensure that the connection between the copper stud 22 and the copper shielding layer 8 is more reliable, the part of the copper stud 22 exposed out of the surface of the epoxy sleeve 4 is sprayed with semi-conductive paint and wrapped with copper foil. The PE copper shell 6, the copper shielding layer 8 and the lower electrode 9 form a tight electrical connection path, and meanwhile the PE copper shell 6 is subjected to grounding treatment. When the PE copper shell 6 is grounded, the copper shielding layer 8 arranged on the surface of the epoxy sleeve 4 and the lower electrode 9 arranged inside the epoxy sleeve are grounded at the same time.

The utility model discloses mainly be applied to the prefabricated insulating joint of combination, the inside epoxy sleeve pipe 4 surface of the 8 cladding PE copper shells of copper shield layer, the exposed partial surface in 6 right sides of PE copper shells does not set up the copper shield layer, but winds the package insulating tape, and the gold utensil of the 4 both sides of epoxy sleeve pipe that set up like this does not actually communicate, can follow electrically and realize insulating, has realized the mutual insulation that connects both sides cable metal sheath promptly. The utility model discloses not only guaranteed that the copper shield layer on epoxy sleeve surface can reliable ground connection, made the cable operation safe and reliable more, also saved the winding copper mesh step in prior art meets the processing simultaneously, optimized mounting process.

Claims

1. The utility model provides a grounding structure of high tension cable connects, is applied to the prefabricated high voltage insulation cable of combination and connects its characterized in that: the combined prefabricated high-voltage cable joint comprises two sections of cables which are fixedly connected through epoxy sleeves, stress cones are respectively sleeved at joint ends of the two sections of cables and are respectively fixed by spring brackets, the epoxy sleeves are arranged at the cable joint, lower electrodes are respectively arranged on the outer sides of the stress cones at two ends in the epoxy sleeves in an annular mode, contacts are respectively arranged on cable cores at the end parts of the two sections of cables, the contacts are in contact with the high-voltage electrodes arranged in the epoxy sleeves to realize a passage function, a PE copper shell is coated on the outermost layer of the cable joint, the length of the PE copper shell is smaller than that of the epoxy sleeves, a copper shielding layer is further arranged on the outer surface of the epoxy sleeve at the position where the PE copper shell is arranged, an insulating tape is arranged on the outer surface of the epoxy sleeve which exceeds the length of the PE copper shell, the lower electrodes are communicated with one end of a copper nut through a connecting rod, and the other end of the copper nut is fixedly connected with the PE copper shell coated at the cable joint, the copper nut body connected with the lower electrode on one side provided with the copper shielding layer is provided with a copper stud, the copper stud extends out of the epoxy sleeve, the end part of the copper stud is tightly attached to the PE copper shell on the outer side of the epoxy sleeve, and the PE copper shell is grounded.

2. A grounding structure of a high voltage cable joint according to claim 1, wherein: the epoxy sleeve is poured at the cable joint in a pouring mode.

3. A grounding structure of a high voltage cable joint according to claim 1, wherein: the lower electrode, the connecting rod and the copper nut are coaxially arranged with the cable after being connected and fixedly connected with the PE copper shell coated at the cable joint through bolts, and the copper stud arranged on the copper nut radially extends out of the epoxy sleeve along the cable.

4. A grounding structure of a high-voltage cable joint according to claim 1 or 3, characterized in that: and the part of the copper stud extending out of the surface of the epoxy sleeve is sprayed with semi-conductive paint and wrapped with copper foil.