CN211209266U - Cable intermediate joint - Google Patents
Cable intermediate joint Download PDFInfo
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- CN211209266U CN211209266U CN202020009802.XU CN202020009802U CN211209266U CN 211209266 U CN211209266 U CN 211209266U CN 202020009802 U CN202020009802 U CN 202020009802U CN 211209266 U CN211209266 U CN 211209266U
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Abstract
The utility model discloses a cable intermediate head, which comprises two cable joint ends, wherein each cable joint end is exposed with a conductor, an inner semi-conductive layer, an insulating layer and an outer semi-conductive layer from inside to outside by cutting from the tail end of the joint end to the other end in sequence, one end of the insulating layer of the two cable joint ends, which is close to the inner semi-conductive layer, is a tapered end which is gradually narrowed, the port parts of the two tapered ends are coated with insulating self-adhesive tape layers, the two ends of the insulating self-adhesive tape layers are respectively lapped with the tapered end and the inner semi-conductive repairing layer, and the insulating self-adhesive tape, the whole outer integration of interior semiconduction restoration layer and insulating layer has melted the insulating restoration layer, the utility model discloses an insulating self-adhesion tape layer has eliminated the insulating layer of cable joint end and the air gap between interior semiconduction restoration layer, insulating restoration layer and the interior semiconduction restoration layer interface, avoids the breakdown of intermediate head insulating medium, has prolonged the life of cable intermediate head.
Description
Technical Field
The utility model relates to a cable intermediate head.
Background
The intermediate joint forms of domestic crosslinked polyethylene insulated cables are various and commonly include: the cable comprises a winding type intermediate joint, a cold shrinkage type intermediate joint, a hot shrinkage type intermediate joint, a prefabricated type intermediate joint, a molding type intermediate joint and the like, wherein the molding type intermediate joint is rapidly developed in recent years due to good electrical, mechanical and waterproof performances, and is widely applied to urban power grid construction and fault repair. However, due to the manufacturing process and other reasons, the conventional molded intermediate joint is easy to generate air gaps at the positions of the new and old two-layer insulation interfaces, which are close to the inner semiconductive layer of the cable, so that partial discharge of the partial molded intermediate joint is overlarge, breakdown failure is generated even under higher voltage impact, and the service life of the cable is short.
Disclosure of Invention
The utility model discloses a main aim at overcomes prior art not enough, provides a simple process, insulating reliable, melt and connect inseparabler cable intermediate head.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a cable intermediate joint comprises two cable joint ends, wherein each cable joint end is sequentially cut from the tail end of the joint end to the other end direction and is exposed from inside to outside to form a conductor, an inner semi-conductive layer, an insulating layer and an outer semi-conductive layer, the conductor of one cable joint end is electrically connected with the conductor of the other cable joint end to form an electrical connector, the electrical connector and the exposed conductors of the two cable joint ends are coated with inner semi-conductive repairing layers, the two ends of each semi-conductive repairing layer are respectively lapped with the inner semi-conductive layers of the two cable joint ends, one end, close to the inner semi-conductive layer, of the insulating layers of the two cable joint ends is a tapered end which gradually narrows, the ports of the two tapered ends are coated with insulating tape layers, the two ends of each insulating tape layer are respectively lapped with the tapered ends and the inner semi-conductive layers, and the insulating tape layers are respectively lapped with, The inner semi-conductive repairing layer and the insulating layers of the two cable joints are integrally fused with the insulating repairing layer, the insulating repairing layer is coated with the outer semi-conductive repairing layer, and two ends of the outer semi-conductive repairing layer are respectively lapped with the outer semi-conductive layers of the two cable joint ends.
Preferably, when each cable joint end is cut from the tail end of the joint end to the other end, the copper shielding layer, the inner sheath, the steel armor layer and the outer sheath are exposed outside the outer semi-conductive layer from inside to outside.
Preferably, the exposed length of the conductor is 50-80mm when the cable joint end is cut from the joint end tail to the other end direction.
Preferably, the exposed length of the inner semiconductive layer is 5 to 10mm when the joint end of each cable is cut in sequence from the joint end to the other end.
Preferably, the conductor of one of the cable joint ends is electrically connected with the conductor of the other cable joint end by exothermic welding, argon arc welding or silver brazing to form an electrical connector.
Preferably, the overlapping length of the insulating self-adhesive tape layer and the conical end is 5-8mm, and the overlapping length of the insulating self-adhesive tape layer and the inner semi-conductive repairing layer is 10-25 mm.
Preferably, the insulation repair layer is formed by winding a cross-linked polyethylene tape, and the thickness of the insulation repair layer is slightly thicker than that of the insulation layers at the joint ends of the two cables.
Preferably, the outer semi-conductive repair layer is formed by semi-conductive paint spraying and semi-conductive belt semi-lap lapping.
Preferably, the outer semi-conductive repairing layer is wrapped with a copper shielding repairing layer, and two ends of the copper shielding repairing layer are respectively lapped with the copper shielding layers of the two cable connector ends.
Preferably, the copper shielding repair layer is coated with an outer protection repair layer, the outer protection repair layer comprises an inner sheath repair layer, a steel armor repair layer and an outer sheath repair layer which are sequentially coated from inside to outside, the inner sheath repair layer is coated outside the copper shielding repair layer, two ends of the inner sheath repair layer are respectively connected with inner sheaths of the two cables, the steel armor repair layer is coated outside the inner sheath repair layer, the steel armor repair layer is connected with the steel armor layers of the two cables through a copper braided ground wire, the copper braided ground wire is fixed to the outer side of the steel armor layer through a constant force spring, the steel armor repair layer is coated with the outer sheath repair layer, two ends of the outer sheath repair layer are respectively connected with outer sheaths of the two cables, and an armor belt is coated outside the outer sheath repair layer.
Preferably, the inner sheath repairing layer and the outer sheath repairing layer are formed by wrapping waterproof adhesive tapes.
As above, the utility model discloses cable intermediate head is in the port department cladding of the insulating layer toper end of two cable joint ends has insulating self-adhesive tape layer, insulating self-adhesive tape layer's both ends respectively with toper end and interior semiconduction are restoreed the layer overlap joint, insulating self-adhesive tape layer has eliminated the insulating layer of cable joint end and has repaired the layer, insulating restoration layer and the interior semiconduction and restore the air gap between the layer interface, avoids intermediate head insulating medium to puncture, has prolonged cable intermediate head's life.
Drawings
Fig. 1 is a schematic structural view of the cable intermediate joint after the conductors are connected;
FIG. 2 is a schematic view of the cable connector end of the cable intermediate connector of FIG. 1;
fig. 3 is a schematic structural view of the intermediate joint of the cable shown in fig. 1 coated with an external protective repair layer.
In fig. 1 to 3, the same reference numerals are used for the same functional parts and the same structures, and the reference numerals of the same parts at symmetrical positions are omitted for the sake of simplicity of the drawings:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
30 | Insulating self- |
| 11 | |
40 | |
| 12 | Inner |
50 | Outer |
| 13 | Insulating |
60 | Copper |
| 14 | Outer |
70 | Outer |
| 15 | |
71 | Inner |
| 16 | |
72 | Steel |
| 17 | |
721 | |
| 18 | |
73 | |
| 19 | |
74 | |
| 20 | Inner semi-conductive repair layer |
Detailed Description
The following describes in detail an embodiment of the present invention for repairing an insulation layer of a power cable intermediate joint. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Referring to fig. 1 and 2, the cable intermediate joint of the present invention includes two cable joint ends 10, and each of the cable joint ends 10 is cut from the joint end tail to the other end direction in sequence to expose a conductor 11, an inner semiconductive layer 12, an insulating layer 13, and an outer semiconductive layer 14 from the inside to the outside.
Wherein a conductor 11 of one cable joint end 10 and a conductor 11 of the other cable joint end 10 are electrically connected together to form an electrical connector 19, an inner semi-conductive repairing layer 20 is coated outside the electrical connector 19 and the exposed conductors 11 of the two cable joint ends 10, two ends of the inner semi-conductive repairing layer 20 are respectively lapped with the inner semi-conductive layers 12 of the two cable joint ends 10, one end of an insulating layer 13 of the two cable joint ends 10 close to the inner semi-conductive layers 12 is a tapered end which gradually narrows, the ports of the two tapered ends are coated with an insulating self-adhesive tape layer 30, two ends of the insulating self-adhesive tape layer 30 are respectively lapped with the tapered end and the inner semi-conductive repairing layer 20, the insulating self-adhesive tape layer 30, the inner semi-conductive repairing layer 20 and the insulating layer 13 of the two cable joints are integrally fused with an insulating repairing layer 40, and the insulating repairing layer 40 is coated with an outer semi-conductive repairing layer, the two ends of the outer semi-conductive repair layer 50 are respectively lapped with the outer semi-conductive layers 14 of the two cable joint ends 10.
As a further improvement of this embodiment, when the joint end of each cable is cut from the tail end of the joint end to the other end, the copper shielding layer 15, the inner sheath 16, the steel armor layer 17 and the outer sheath 18 are exposed outside the outer semi-conductive layer from inside to outside.
As a further improvement of this embodiment, when the joint end of each cable is cut from the joint end tail to the other end direction, the exposed length of the conductor is 50-80 mm.
As a further improvement of this embodiment, when the cable joint end is cut in sequence from the joint end tail to the other end, the exposed length of the inner semiconductive layer 12 is 5 to 10 mm.
As a further improvement of the present embodiment, the conductor 11 of one cable joint end 10 is electrically connected to the conductor 11 of another cable joint end 10 by exothermic welding, argon arc welding or silver brazing to form an electrical connector 19.
As a further improvement of this embodiment, the overlapping length of the self-adhesive insulating tape layer 30 and the tapered end is 5-8mm, and the overlapping length of the self-adhesive insulating tape layer 30 and the inner semi-conductive repair layer 20 is 10-25 mm.
As a further improvement of this embodiment, the insulation repair layer 40 is formed by winding a cross-linked polyethylene tape, and the thickness of the insulation repair layer 40 is slightly thicker than the thickness of the insulation layer 13 of the two cable joint ends 10.
As a further improvement of this embodiment, the outer semi-conductive repair layer 50 is formed by semi-conductive paint spraying and semi-conductive tape half lap wrapping.
As a further improvement of this embodiment, a copper shield repair layer 60 is coated outside the outer semiconductive repair layer 50, and both ends of the copper shield repair layer 60 are respectively overlapped with the copper shield layers 15 of the two cable connector ends 10.
As a further improvement of this embodiment, the copper shielding repair layer 60 is externally covered by an external protection repair layer 70, please refer to fig. 3, the outer protection repairing layer 70 comprises an inner sheath repairing layer 71, a steel armor repairing layer 72 and an outer sheath repairing layer 73 which are sequentially coated from inside to outside, the inner sheath repairing layer 71 is coated outside the copper shielding repairing layer 60, two ends of the inner sheath repairing layer 71 are respectively connected with the inner sheaths 16 of the two cables, the steel armor repairing layer 72 is coated outside the inner sheath repairing layer 71, the steel armor repairing layer 72 is connected with the steel armor layers 17 of the two cables by adopting a copper woven ground wire, the copper woven ground wire is fixed on the outer side of the steel armor layer 17 through a constant force spring 721, an outer sheath repairing layer 73 is coated outside the steel armor repairing layer 72, two ends of the outer sheath repairing layer 73 are respectively connected with the outer sheaths 18 of the two cables, and an armor tape 74 is wound outside the outer sheath repairing layer 73.
As a further improvement of this embodiment, the inner sheath repairing layer 71 and the outer sheath repairing layer 73 are both formed by wrapping waterproof adhesive tapes.
To sum up, the utility model discloses cable intermediate head is in the port department cladding of the 13 toper ends of insulating layer of two cable joint ends 10 has insulating self-adhesive tape layer 30, insulating self-adhesive tape layer 30 both ends respectively with toper end and interior semiconduction restoration layer 20 overlap joint, the air gap between insulating layer 13 and interior semiconduction restoration layer 20, insulating restoration layer 40 and the interior semiconduction restoration layer 20 interface of having eliminated cable joint end 10 avoids intermediate head insulating medium to puncture, has prolonged cable intermediate head's life.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the invention, and these alternatives or modifications should be considered as belonging to the protection scope of the invention.
Claims (11)
1. A cable intermediate head which characterized in that: the cable joint comprises two cable joint ends, wherein each cable joint end is sequentially cut from the tail end of the joint end to the other end direction and is exposed with a conductor, an inner semi-conducting layer, an insulating layer and an outer semi-conducting layer from inside to outside, the conductor of one cable joint end is electrically connected with the conductor of the other cable joint end to form an electrical connector, the electrical connector and the exposed conductors of the two cable joint ends are coated with inner semi-conducting repairing layers, the two ends of each inner semi-conducting repairing layer are respectively lapped with the inner semi-conducting layers of the two cable joint ends, one end of the insulating layer of the two cable joint ends, which is close to the inner semi-conducting layer, is a tapered end which gradually narrows, the ports of the two tapered ends are coated with insulating self-adhesive tape layers, the two ends of each insulating tape layer are respectively lapped with the tapered ends and the inner semi-conducting repairing layers, and the insulating self-adhesive tape layers, the inner repairing semi-conducting layers and, and the insulating repair layer is coated with an outer semi-conductive repair layer, and two ends of the outer semi-conductive repair layer are respectively lapped with the outer semi-conductive layers at the joint ends of the two cables.
2. The cable intermediate joint of claim 1, wherein: and when the cable joint end is sequentially cut from the tail end of the joint end to the other end, the copper shielding layer, the inner sheath, the steel armor layer and the outer sheath are exposed outside the outer semi-conductive layer from inside to outside.
3. The cable intermediate joint of claim 1, wherein: and when the joint end of each cable is cut from the tail end of the joint end to the other end, the exposed length of the conductor is 50-80 mm.
4. The cable intermediate joint of claim 1, wherein: and when the joint end of each cable is cut from the tail end of the joint to the other end, the exposed length of the inner semi-conducting layer is 5-10 mm.
5. The cable intermediate joint of claim 1, wherein: the conductor of one cable joint end is electrically connected with the conductor of the other cable joint end through exothermic welding, argon shielded welding or silver brazing to form an electrical connector.
6. The cable intermediate joint of claim 1, wherein: the overlapping length of the insulating self-adhesive tape layer and the conical end is 5-8mm, and the overlapping length of the insulating self-adhesive tape layer and the inner semi-conductive repairing layer is 10-25 mm.
7. The cable intermediate joint of claim 1, wherein: the insulation repairing layer is formed by winding a cross-linked polyethylene belt, and the thickness of the insulation repairing layer is slightly thicker than that of the insulation layers at the joint ends of the two cables.
8. The cable intermediate joint of claim 1, wherein: the outer semi-conductive repairing layer is formed by semi-conductive paint spraying and semi-conductive belt semi-lap lapping.
9. The cable intermediate joint of claim 1, wherein: and the outer semi-conductive repairing layer is coated with a copper shielding repairing layer, and two ends of the copper shielding repairing layer are respectively lapped with the copper shielding layers at the joint ends of the two cables.
10. The cable intermediate joint of claim 9, wherein: the copper shielding repairing layer is coated with an outer protecting repairing layer, the outer protecting repairing layer comprises an inner sheath repairing layer, a steel armor repairing layer and an outer sheath repairing layer which are sequentially coated from inside to outside, the inner sheath repairing layer is coated outside the copper shielding repairing layer, two ends of the inner sheath repairing layer are respectively connected with inner sheaths of two cables, the steel armor repairing layer is coated outside the inner sheath repairing layer, the steel armor repairing layer is connected with the steel armor layers of the two cables through a copper woven ground wire, the copper woven ground wire is fixed to the outer side of the steel armor layer through a constant force spring, the outer sheath repairing layer is coated outside the steel armor repairing layer, two ends of the outer sheath repairing layer are respectively connected with outer sheaths of the two cables, and an armor belt is wrapped outside the outer sheath repairing layer.
11. The cable intermediate joint of claim 10, wherein: the inner sheath repairing layer and the outer sheath repairing layer are formed by wrapping waterproof adhesive tapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020009802.XU CN211209266U (en) | 2020-01-03 | 2020-01-03 | Cable intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020009802.XU CN211209266U (en) | 2020-01-03 | 2020-01-03 | Cable intermediate joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211209266U true CN211209266U (en) | 2020-08-07 |
Family
ID=71853984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020009802.XU Active CN211209266U (en) | 2020-01-03 | 2020-01-03 | Cable intermediate joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211209266U (en) |
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2020
- 2020-01-03 CN CN202020009802.XU patent/CN211209266U/en active Active
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