CN114068086A

CN114068086A - Cable welding joint

Info

Publication number: CN114068086A
Application number: CN202111416220.9A
Authority: CN
Inventors: 马关印; 马希龙; 赫志强
Original assignee: Hangzhou Yuema Power Technology Co ltd
Current assignee: Hangzhou Yuema Power Technology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-02-18

Abstract

The invention relates to a cable fusion joint in the technical field of electric power transportation, which comprises a conductor recovery fusion piece, a shielding insulating layer, a metal shielding recovery layer and a protective layer, wherein one end of the conductor recovery fusion piece is fused with a first wire core, the other end of the conductor recovery fusion piece is fused with a second wire core, the conductor recovery fusion piece is positioned in the middle of the second wire core, and the shielding insulating layer, the metal shielding recovery layer and the protective layer are sequentially wrapped on the outer surfaces of the first wire core and the second wire core.

Description

Cable welding joint

Technical Field

The invention relates to the technical field of electric power transportation, in particular to a cable fusion joint.

Background

In the existing cable power production technology, power transportation needs to be carried out through cable connectors, and common cable connectors are in a through type, on one hand, the through type cable connectors can only realize power transportation between two places, if more than two places need to be transported, the number of the through type cable connectors needs to be increased, the transportation cost is improved, and meanwhile, the workload of cable transportation workers is increased; on the other hand, the practical environment of the cable relates to various complex factors such as urban underground power grids, rivers, sea and the like, so that the reliability of the intermediate connection of the cable is particularly important for ensuring the electricity consumption of residents and enterprises and public institutions.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the cable fusion joint which has the advantages of good waterproofness and cost saving, and breaks through the bottleneck of cost increase caused by the use of a large number of cable branch box cable plug heads in the traditional power industry.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the utility model provides a cable fusion splice, resumes butt fusion piece, shielding insulating layer, metallic shield including the conductor and resumes layer and protective layer, the one end butt fusion that the conductor resumes butt fusion piece has first sinle silk, the other end butt fusion that the conductor resumes butt fusion piece has the second sinle silk, just the conductor resumes the middle part that butt fusion piece is located the second sinle silk, the surface of first sinle silk and second sinle silk all wraps up in proper order has shielding insulating layer, metallic shield to resume layer and protective layer.

Optionally, the shielding insulating layer includes an inner semi-conductive recovery layer, a main insulation recovery layer, and an outer semi-conductive recovery layer, the main insulation recovery layer wraps the outer surface of the inner semi-conductive recovery layer, and the outer semi-conductive recovery layer wraps the outer surface of the main insulation recovery layer.

Optionally, the protective layer is an outer sheath layer, and the outer sheath layer wraps the outer surface of the metal shielding recovery layer.

Optionally, the circumferential diameter of the conductor recovery welding piece is equal to the circumferential diameter of the first wire core.

Optionally, the circumferential diameter of the conductor recovery welding piece is equal to the circumferential diameter of the second wire core.

Optionally, the first wire core and the second wire core are any one of a copper core, an aluminum core, a copper alloy core or an aluminum alloy core.

Optionally, the main insulation recovery layer is a cross-linked polyethylene material.

Optionally, the outer jacket layer sets up the one end of keeping away from the conductor at first sinle silk and resuming the welding piece, the outer jacket layer still sets up the both ends at the second sinle silk.

Optionally, the outer sheath layer is made of a non-metal material.

Optionally, the length of the outer sheath layer is 15 cm.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

through connecting first sinle silk in the middle part of second sinle silk, thereby make the second sinle silk shunt power transportation, realize the function that power transportation is divided into two, the cable that is divided into two simultaneously connects, can replace traditional electric power industry to use a large amount of cable branch box cable plug heads, the cost is reduced, and adopt the butt fusion formula to connect, make electric field distribution on the cable butt fusion connects unanimously, avoid taking place partial discharge, the service life is prolonged, simultaneously through the setting on oversheath layer, the waterproof nature that the cable connects has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural view of a cable fusion splice according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a position of a shielding insulating layer and a protective layer of a cable fusion splice according to an embodiment of the present invention.

Reference numerals: 1. a conductor recovery weld; 2. a first wire core; 3. a second wire core; 4. an inner semi-conductive restoration layer; 5. a primary insulation recovery layer; 6. an outer semi-conductive restoration layer; 7. a metal shield recovery layer; 8. an outer jacket layer.

Detailed Description

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

As shown in fig. 1, a cable fusion splice, restore welding element 1 including the conductor, shielding insulating layer, metallic shield restores layer 7 and protective layer, the conductor restores the one end welding of welding element 1 to have first sinle silk 2, and the conductor restores the other end welding of welding element 1 to have second sinle silk 3, and the conductor restores welding element 1 to be located the middle part of second sinle silk 3, and the surface of first sinle silk 2 and second sinle silk 3 has all wrapped gradually shielding insulating layer, metallic shield and has restored layer 7 and protective layer.

Insert electric power through first sinle silk 2, then realize the reposition of redundant personnel of electric power through second sinle silk 3, thereby make in practical application, reach the effect that electric power transportation is divided into two, thereby practice thrift the cost, the conductor resumes splice 1 and first sinle silk 2 simultaneously, the connected mode of second sinle silk 3 all adopts exothermic welding connection's mode to connect, thereby realize the molecule welding, first sinle silk 2 and second sinle silk 3 do not receive destruction, and make the whole validity of interface not change, can bear repeatability heavy current impact during the trouble, not to fusing.

As shown in fig. 2, the shield insulation layer comprises an inner semi-conductive restoration layer 4, a main insulation restoration layer 5 and an outer semi-conductive restoration layer 6, the main insulation restoration layer 5 wraps the outer surface of the inner semi-conductive restoration layer 4, wherein, the inner semi-conductive recovery layer 4 and the outer semi-conductive recovery layer 6 are both semi-conductive materials, the first wire core 2 and the second wire core 3 are any one of copper core, aluminum core, copper alloy core or aluminum alloy core, the main insulation recovery layer 5 is cross-linked polyethylene material, when the main insulation recovery layer 5 is connected with the shield recovery layer and the outer semi-conductive recovery layer 6, the air-gap-free interface is fused and combined, the complete cable is structurally formed without the concept of joint, the cable has the durability of stable operation, wherein the inner semi-conductive restoration layer 4, the main insulation restoration layer 5, the outer semi-conductive restoration layer 6, the metal shielding restoration layer 7 and the protective layer are all restored according to the cable structure.

Outer semiconductive recovery layer 6 wraps up and sets up in the surface of main insulating recovery layer 5, and the protective layer is oversheath layer 8, and oversheath layer 8 wraps up and sets up in the surface of metallic shield recovery layer 7, and oversheath layer 8 is non-metallic material.

Taking the first wire core 2 and the second wire core 3 as copper core for example, the first wire core and the second wire core are usually formed by twisting a plurality of wires, an air gap is easily formed between the first wire core 2 and the main insulation recovery layer 5, the surface of the conductor is not smooth, which causes electric field concentration, an inner semi-conductive recovery layer 4 made of semiconductor material is added on the outer surface of the first wire core 2 and the second wire core 3, which is equipotential with the first wire core 2 and the second wire core 3 which are shielded, and is in good contact with the main insulation recovery layer 5, thereby avoiding partial discharge between the first wire core 2, the second wire core 3 and the main insulation recovery layer 5, on the other hand, an outer semi-conductive recovery layer 6 made of semiconductor material is added on the outer surface of the main insulation recovery layer 5, which is in good contact with the main insulation recovery layer 5 which is shielded, and is equipotential with the metal shielding recovery layer 7, thereby avoiding partial discharge, on the other hand, the outer sheath layer 8 plays a role in protection, prevents the cable fusion joint from being corroded when deeply buried underground, and prolongs the service life.

The circumferential diameter of the conductor recovery welding piece 1 is equal to the circumferential diameter of the first wire core 2, the circumferential diameter of the conductor recovery welding piece 1 is equal to the circumferential diameter of the second wire core 3, and the circumferential diameters of the conductor recovery welding piece 1, the first wire core 2 and the second wire core 3 are equal to each other by polishing.

The outer jacket layer 8 sets up the one end of keeping away from conductor recovery welding spare 1 at first sinle silk 2, and outer jacket layer 8 still sets up the both ends at second sinle silk 3, and the length of outer jacket layer 8 is 15cm to protect the cable joint through outer jacket layer, and have better waterproof performance.

Taking three-core cable as an example, if electric power transportation needs to transport the electric power in A district to B district and C district, then the accessible sets up three cable joints, and the three-phase electricity in A district connects the first sinle silk 2 that three cable joints were organized respectively, and the both ends of the second sinle silk 3 that three cable joints were organized link into B district and C district respectively to accomplish the electric power transportation in A district to B district and C district, avoided using traditional straight-through cable to need to set up six group's cost pressure.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a cable fusion splice, its characterized in that resumes layer and protective layer including conductor recovery welding spare, shielding insulating layer, metallic shield, the conductor resumes the one end welding of welding spare and has connect first sinle silk, the other end welding that the conductor resumes the welding spare has the second sinle silk, just the conductor resumes the middle part that the welding spare is located the second sinle silk, the surface of first sinle silk and second sinle silk all wraps up in proper order has shielding insulating layer, metallic shield to resume layer and protective layer.

2. The fusion splice of cables of claim 1, wherein the shield insulation layer includes an inner semiconductive recovery layer, a main insulation recovery layer, and an outer semiconductive recovery layer, the main insulation recovery layer being disposed around the outer surface of the inner semiconductive recovery layer, and the outer semiconductive recovery layer being disposed around the outer surface of the main insulation recovery layer.

3. The fused cable splice of claim 1, wherein said protective layer is an outer jacket layer disposed about an outer surface of said metallic shield recovery layer.

4. The fusion splice of cables of claim 1, in which said conductor recovery fuse has a circumferential diameter of the same size as the circumferential diameter of said first core.

5. The fusion splice of cables of claim 1, in which said conductor recovery fuse has a circumferential diameter of the same size as the circumferential diameter of said second core.

6. The fusion splice cable of claim 1, wherein the first and second cores are any one of copper, aluminum, copper alloy or aluminum alloy cores.

7. A fusion splice for cables according to claim 2 in which the primary insulation recovery layer is a cross-linked polyethylene material.

8. The fused cable joint of claim 3, wherein the outer jacket is disposed on the first core at a location remote from the conductor recovery weld, and wherein the outer jacket is disposed on the second core at a location remote from the second core.

9. The fused cable joint of claim 8, wherein the outer jacket layer is a non-metallic material.

10. The fused cable splice of claim 9, wherein said outer jacket layer has a length of 15 cm.