CN214590526U - Three-core cable fusion splicing type intermediate joint - Google Patents
Three-core cable fusion splicing type intermediate joint Download PDFInfo
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- CN214590526U CN214590526U CN202120747541.6U CN202120747541U CN214590526U CN 214590526 U CN214590526 U CN 214590526U CN 202120747541 U CN202120747541 U CN 202120747541U CN 214590526 U CN214590526 U CN 214590526U
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Abstract
The utility model belongs to the technical field of welded cable, specifically disclose a three-core cable welded intermediate head, include two sections and strip the cable of handling back and butt joint in advance, the butt joint end of cable exposes oversheath, steel armour layer, inner sheath, copper shield layer, outer semi-conducting layer, insulating layer, inner semi-conducting layer and conductor from outside to inside in proper order, still includes fire-retardant sticky tape, first waterproof sticky tape and second waterproof sticky tape, fire-retardant sticky tape half lap-joint twines between the copper shield layer of two three-core cables and covers on the copper shield net to draw together three-phase of three-core cable; the first waterproof adhesive tape is wound on the inner protective layers of the two three-core cables in a half lap joint mode and covers the flame-retardant adhesive tape; the second waterproof adhesive tape is wound on the outer sheaths of the two three-core cables in a half-lap joint mode and covers the first waterproof adhesive tape, so that the temperature resistance and the air tightness of the cable intermediate joint are protected, and the cable intermediate joint can resist flame and is waterproof.
Description
Technical Field
The utility model relates to a butt fusion formula cable technical field, in particular to three-core cable butt fusion formula intermediate head.
Background
In order to meet the requirement of high-voltage load, the existing high-voltage circuit mainly transmits high-voltage power through a cable. The purpose of long-distance power transmission is achieved by connecting a section of cable.
Because the cable needs to pass through different environments and has the influence of high temperature, high pressure and humidity, the requirements on various performances of the intermediate joint for connecting the cable are higher.
The existing cable intermediate joint has inconsistent electrical properties (electric field distribution) at the intermediate joint due to inconsistent structure of the formed cable joint and the cable structure, so that the intermediate joint is easily broken down by an electric field. In addition, the existing cable intermediate joint is designed only aiming at specific environment, and the requirements of water resistance and flame retardance are difficult to meet at the same time.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model provides a three-core cable welded intermediate head.
The utility model provides a technical scheme that its technical problem adopted is: a three-core cable welding type intermediate joint comprises two sections of cables which are stripped and pre-jointed, wherein an outer sheath, a steel armor layer, an inner protection layer, a copper shielding layer, an outer semi-conducting layer, an insulating layer, an inner semi-conducting layer and conductors are sequentially exposed at the joint end of the cables from outside to inside, the conductors of the two cables are coaxially and welded, an inner semi-conducting belt is wound between the inner semi-conducting layers of the two cables in a half-lap joint mode and is arranged at the welding joint position of the conductors of the two cables, an insulating belt is wound between the insulating layers of the two cables in a half-lap joint mode and is covered on the inner semi-conducting belt, an outer semi-conducting belt is wound between the outer semi-conducting layers of the two cables in a half-lap joint mode and is covered on the insulating belt, a copper shielding net is sleeved between the copper shielding layers of the two cables, and two ends of the copper shielding net are fixed on the copper layers of the two cables through constant force springs and are covered on the outer semi-conducting layers of the two cables A conductive tape;
the flame-retardant cable is characterized by further comprising a flame-retardant adhesive tape, a first waterproof adhesive tape and a second waterproof adhesive tape, wherein the flame-retardant adhesive tape is wound between the copper shielding layers of the two three-core cables in a half lap joint mode and covers the copper shielding net so as to gather three phases of the three-core cables; the first waterproof adhesive tape is wound on the inner protective layers of the two three-core cables in a half lap joint mode and covers the flame-retardant adhesive tape; and the second waterproof adhesive tape is wound on the outer sheaths of the two three-core cables in a half lap joint manner and covers the first waterproof adhesive tape.
Preferably, the cable further comprises a steel-sheathed ground wire, two ends of the steel-sheathed ground wire are fixed on the steel sheath layers of the two three-core cables through constant force springs, and the second waterproof adhesive tape covers the steel-sheathed ground wire.
Preferably, the waterproof cable further comprises an armor tape, and the armor tape is wound on the outer sheaths of the two three-core cables in a half lap joint mode and covers the second waterproof adhesive tape.
Preferably, a copper woven ground wire is connected between two ends of the copper shielding net, and the two ends of the copper shielding net and the two ends of the copper woven ground wire are fixed on the copper shielding layers of the two cables through constant force springs.
Preferably, the inner semiconductive tape, the insulating tape and the outer semiconductive tape are of the same material as the inner semiconductive layer, the insulating layer and the outer semiconductive layer.
Preferably, the insulating tape is made of a meltable crosslinked polyethylene material, and the inner semiconductor tape is made of a meltable material.
The utility model has the advantages that:
1. the conductors of the two cables are coaxial and are connected through fusion welding by the welding mould, so that the diameter of the welding position of the conductors of the two cables is consistent with that of the conductors, no obvious joint characteristic exists, and the cables at the welding position can be bent without worrying about the influence caused by cable dragging.
2. The middle joint is recovered by adopting a material which is the same as the cable insulation, so that the recovered insulation and the cable insulation are combined in a melting way without an air gap interface, the whole consistent with the cable is formed structurally, the obvious joint characteristic is avoided, the insulation strength is consistent with that of the original cable, the electric insulation and the durability stable in operation are higher, and the waterproof and electric field stable distribution effects are realized.
3. The connector body and each layer of the cable body are integrated through fusion, an interface is eliminated, the connector body has the internal waterproof property naturally, and the waterproof performance is good. The flame-retardant adhesive tape is wound between the copper shielding layers of the two three-core cables in a half lap joint mode and covers the copper shielding net, but is not wound on the inner protection layer, so that three phases of the three-core cables are gathered, and the flame-retardant effect is achieved; the first waterproof adhesive tape is wound on the inner protective layers of the two three-core cables in a half lap joint mode and covers the flame-retardant adhesive tape, so that the inner layers are sealed and waterproof; the second waterproof adhesive tape is wound on the outer sheaths of the two three-core cables in a half-lap joint mode and covers the first waterproof adhesive tape, so that outer layer sealing and waterproofing are achieved, and the first waterproof adhesive tape and the second waterproof adhesive tape can be wound according to the thickness of actual needs. The semi-lap winding mode can ensure better tightness, and the reasonable layer-by-layer covering of the flame-retardant adhesive tape, the first waterproof adhesive tape and the second waterproof adhesive tape can protect the temperature resistance and the air tightness of the cable intermediate joint, so that the cable intermediate joint can resist flame and resist water.
Drawings
Fig. 1 is a schematic view of a cable according to an embodiment of the present invention;
FIG. 2 is a schematic view of an embodiment of the present invention in which a copper shield is sleeved on an outer semi-conductive belt;
fig. 3 is a schematic view of a three-core cable according to an embodiment of the present invention;
FIG. 4 is a schematic view of an embodiment of the present invention in which a flame retardant tape is wound onto a copper shield layer of another three-core cable by half lap-jointing the copper shield layer of the three-core cable;
fig. 5 is a schematic view illustrating a first waterproof tape of an embodiment of the present invention being wound from an inner sheath of a three-core cable to an inner sheath of another three-core cable in a half lap joint manner;
fig. 6 is a schematic view illustrating a second waterproof tape wound on an outer sheath of another three-core cable in half lap joint from the outer sheath of the three-core cable according to an embodiment of the present invention;
fig. 7 is a schematic view of an armor tape being wound from an outer jacket of a three-core cable to an outer jacket of another three-core cable in an embodiment of the present invention in a half lap joint manner.
In the figure, 1-three-core cable, 11-cable, 111-conductor, 112-inner semi-conductive layer, 1121-inner semi-conductive layer, 113-insulating layer, 1131-insulating layer, 114-outer semi-conductive layer, 1141-outer semi-conductive layer, 115-copper shielding layer, 1151-copper shielding net, 1152-copper braided ground wire, 116-inner protective layer, 117-steel armor layer, 1171-steel armor ground wire, 118-outer protective layer, 2-flame retardant adhesive tape, 3-first waterproof adhesive tape, 4-second waterproof adhesive tape and 5-armor tape.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-7, the utility model provides a pair of three-core cable welded intermediate head, strip the cable 11 of handling back and butt joint in advance including two sections, the butt joint end of cable 11 exposes oversheath 118 by outside to inside in proper order, steel armour layer 117, interior sheath 116, copper shield layer 115, outer semi-conducting layer 114, insulating layer 113, interior semi-conducting layer 112 and conductor 111, the conductor 111 of two cables 11 is with the axle center and carry out the fusion welding through the welding mould and connect, make the splice diameter of the conductor 111 of two cables 11 unanimous with the diameter of conductor 111, there is not obvious joint characteristic, and splice cable 11 flexible, need not to worry that cable 11 drags to cause to influence the welding and to require not high to ambient temperature humidity, have higher temperature control because of the welding mould. An inner semi-conducting belt 1121 is wound in a half lap joint mode between inner semi-conducting layers 112 of two cables 11, the inner semi-conducting belt 1121 covers the fusion welding connection position of conductors 111 of the two cables 11, an insulating belt 1131 is wound in a half lap joint mode between insulating layers 113 of the two cables 11, the insulating belt 1131 covers the inner semi-conducting belt 1121, an outer semi-conducting belt 1141 is wound in a half lap joint mode between outer semi-conducting layers 114 of the two cables 11, the outer semi-conducting belt 1141 covers the insulating belt 1131, a copper shielding net 1151 is sleeved between the copper shielding layers 115 of the two cables 11, and two ends of the copper shielding net 1151 are fixed to the copper shielding layers 115 of the two cables 11 through constant force springs and cover the outer semi-conducting belt 1141.
Before the conductors 111 of the two cables 11 are soldered, a cold-shrink tube is sleeved on each phase cable 11 of one of the three-core cables 1, and a copper shield 1151 is sleeved on each phase cable 11 of the other three-core cable 1. The insulating tape 1131 is made of a meltable cross-linked polyethylene material, the inner semiconductor tape 1121 is made of a meltable material, after the inner semiconductor tape 1121 and the insulating tape 1131 having a required thickness are wound, a cold-shrink sleeve is fitted over the insulating tape 1131 and heated, so that the insulating tape 1131 and the inner semiconductor tape 1121 are melted uniformly and respectively fused and bonded to the insulating layer 113 and the inner semiconductor layer 112, and the insulating tape 1131 and the inner semiconductor tape 1121 are fused and bonded together without a molecular permeability of a movable interface, so that the fusion-spliced intermediate joint fundamentally realizes a process for recovering the body structure of the cable 11. After the insulating tape 1131 and the inner semi-conducting tape 1121 are melted uniformly, the insulating tape 1131 is not heated and stands for a period of time, the cold shrink tube is stripped, the surface of the insulating tape 1131 is smooth and is uniformly adhered to the insulating layer 113, and the waterproof and insulating effects are achieved. Meanwhile, the inner semi-conductive tape 1121, the insulating tape 1131 and the outer semi-conductive tape 1141 are made of the same materials as those of the inner semi-conductive layer 112, the insulating layer 113 and the outer semi-conductive layer 114, so that the joint structure of the formed cable 11 is the same as that of the cable 11, the design principle is the same as that of the cable 11, the cable 11 structurally forms the same whole with the cable 11 without obvious joint characteristics, the insulation strength is the same as that of the original cable 11, and the cable has higher electrical insulation and stable running durability.
The flame-retardant cable is characterized by further comprising a flame-retardant adhesive tape 2, a first waterproof adhesive tape 3 and a second waterproof adhesive tape 4, wherein the flame-retardant adhesive tape 2 is wound between the copper shielding layers 115 of the two three-core cables 1 in a half lap joint mode and covers the copper shielding net 1151, but is not wound on the inner protection layer 116, so that the three phases of the three-core cables 1 are gathered, and the middle joint is prevented from catching fire due to overhigh temperature; the first waterproof adhesive tape 3 is wound on the inner protective layers 116 of the two three-core cables 1 in a half lap joint mode and covers the flame-retardant adhesive tape 2, so that inner layer sealing and waterproofing are achieved; the second waterproof adhesive tape 4 is wound on the outer sheaths 118 of the two three-core cables 1 in a half lap joint manner and covers the first waterproof adhesive tape 3, so that outer layer sealing and waterproofing are realized, and the first waterproof adhesive tape 3 and the second waterproof adhesive tape 4 can be wound according to the thickness of actual needs. The winding mode of half overlap joint can ensure the leakproofness of preferred, covers through fire-retardant sticky tape 2, first waterproof sticky tape 3 and the reasonable successive layer of second waterproof sticky tape 4, realizes 11 intermediate junction temperature toleration and air tightness protection of cable for three-core cable 1 can prevent fires again can be waterproof.
Further, the waterproof cable further comprises a steel armor ground wire 1171, two ends of the steel armor ground wire 1171 are fixed on the steel armor layers 117 of the two three-core cables 1 through constant force springs and communicated with the two steel armor layers 117, and the second waterproof adhesive tape 4 covers the steel armor ground wire 1171, so that the waterproof performance of the steel armor layers 117 is achieved.
In addition, still include armor area 5, armor area 5 half overlap joint twines on the oversheath 118 of two three-core cables 1 and covers on second waterproof sticky tape 4, and firm butt fusion formula intermediate joint structure realizes fire-retardant effect simultaneously.
Furthermore, a copper woven ground wire 1152 is connected between two ends of the copper shielding net 1151, and two ends of the copper shielding net 1151 and two ends of the copper woven ground wire 1152 are fixed on the copper shielding layers 115 of the two cables 11 through constant force springs.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. A three-core cable fusion-type intermediate joint is characterized by comprising two sections of cables (11) which are stripped and are in pre-butt joint, wherein butt joint ends of the cables (11) sequentially expose an outer sheath (118), a steel armor layer (117), an inner protection layer (116), a copper shielding layer (115), an outer semi-conducting layer (114), an insulating layer (113), an inner semi-conducting layer (112) and a conductor (111) from outside to inside, the conductors (111) of the two cables (11) are coaxial and are in fusion welding connection, an inner semi-conducting belt (1121) is wound between the inner semi-conducting layers (112) of the two cables (11) in a half lap joint mode, the inner semi-conducting belt (1121) covers the fusion welding connection position of the conductors (111) of the two cables (11), an insulating belt (1131) is wound between the insulating layers (113) of the two cables (11) in a half lap joint mode, and the insulating belt (1131) covers the inner semi-conducting belt (1121), an outer semi-conductive belt (1141) is wound between the outer semi-conductive layers (114) of the two cables (11) in a half-lap joint mode, the outer semi-conductive belt (1141) covers the insulating belt (1131), a copper shielding net (1151) is sleeved between the copper shielding layers (115) of the two cables (11), and two ends of the copper shielding net (1151) are fixed to the copper shielding layers (115) of the two cables (11) through constant force springs and cover the outer semi-conductive belt (1141);
the three-phase cable is characterized by further comprising a flame-retardant adhesive tape (2), a first waterproof adhesive tape (3) and a second waterproof adhesive tape (4), wherein the flame-retardant adhesive tape (2) is wound between copper shielding layers (115) of two three-core cables (1) in a half-lap joint mode and covers a copper shielding net (1151) so as to gather three phases of the three-core cables (1); the first waterproof adhesive tape (3) is wound on the inner protective layers (116) of the two three-core cables (1) in a half lap joint mode and covers the flame-retardant adhesive tape (2); the second waterproof adhesive tape (4) is wound on the outer sheaths (118) of the two three-core cables (1) in a half lap joint mode and covers the first waterproof adhesive tape (3).
2. The fused intermediate joint for three-core cables as claimed in claim 1, wherein: the cable is characterized by further comprising a steel armor ground wire (1171), two ends of the steel armor ground wire (1171) are fixed on steel armor layers (117) of the two three-core cables (1) through constant force springs, and the second waterproof adhesive tape (4) covers the steel armor ground wire (1171).
3. A three-core cable fusion splice intermediate joint as claimed in claim 1 or 2, wherein: the waterproof cable is characterized by further comprising an armor belt (5), wherein the armor belt (5) is wound on outer sheaths (118) of the two three-core cables (1) in a half lap joint mode and covers the second waterproof adhesive tape (4).
4. The fused intermediate joint for three-core cables as claimed in claim 1, wherein: the copper-braided ground wire (1152) is connected and arranged between two ends of the copper shielding net (1151), and two ends of the copper shielding net (1151) and two ends of the copper-braided ground wire (1152) are fixed on two copper shielding layers (115) of the cable (11) through constant force springs.
5. The fused intermediate joint for three-core cables as claimed in claim 1, wherein: the inner semiconducting tape (1121), the insulating tape (1131) and the outer semiconducting tape (1141) are made of the same material as the inner semiconducting layer (112), the insulating layer (113) and the outer semiconducting layer (114).
6. The fused intermediate joint for three-core cables as claimed in claim 5, wherein: the insulating tape (1131) is made of meltable cross-linked polyethylene, and the inner semi-conducting tape (1121) is made of meltable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120747541.6U CN214590526U (en) | 2021-04-13 | 2021-04-13 | Three-core cable fusion splicing type intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120747541.6U CN214590526U (en) | 2021-04-13 | 2021-04-13 | Three-core cable fusion splicing type intermediate joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214590526U true CN214590526U (en) | 2021-11-02 |
Family
ID=78359506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120747541.6U Expired - Fee Related CN214590526U (en) | 2021-04-13 | 2021-04-13 | Three-core cable fusion splicing type intermediate joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214590526U (en) |
-
2021
- 2021-04-13 CN CN202120747541.6U patent/CN214590526U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |