CN218826297U

CN218826297U - High-voltage cable

Info

Publication number: CN218826297U
Application number: CN202223255864.7U
Authority: CN
Inventors: 王爽; 焦宏所; 王淑娟; 王洪祥; 马龙
Original assignee: Tbea Shandong Luneng Taishan Cable Co ltd
Current assignee: Tbea Shandong Luneng Taishan Cable Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-04-07
Anticipated expiration: 2032-12-02

Abstract

The utility model provides a high-voltage cable, include the conductor layer that sets gradually by interior to exterior, the insulating layer, shielding layer and protective layer, the protective layer includes semiconduction buffer layer and metal sheath layer, the semiconduction buffer layer is including laminating inlayer and skin each other, outer one side and the laminating of shielding layer are kept away from to the inlayer, the outer one side and the laminating of metal sheath layer of keeping away from the inlayer, the inlayer is semiconduction butyl sticky tape, semiconduction butyl sticky tape is in order to be used for preventing the conductor layer, insulating layer and shielding layer inflation expand broken metal sheath layer, specifically, the conductor layer when the cable moves, insulating layer and shielding layer can expand, through improving the conductor layer of the clutch inside of semiconduction butyl sticky tape, insulating layer and shielding layer, prevent that the inflation back clearance reduces and lead to expanding broken metal sheath layer, adopt tensile strength more than or equal to 150 MPa's semiconduction butyl sticky tape, can effectively restrain the conductor layer, insulating layer and shielding layer excessive inflation when the moving, this high-voltage cable has the advantage that the protective metal sheath layer is not expanded.

Description

High-voltage cable

Technical Field

The utility model belongs to high voltage power cable field especially relates to a high tension cable.

Background

China is a large country for manufacturing cables and is also a large country for consuming cables, the demand of high-voltage cables is continuously vigorous along with the high-speed development of urbanization, the aluminum resource is rich, the copper resource is deficient, the copper price is high for a long time, and the 'aluminum with copper' becomes an international trend. Based on the ablation problem of the high-voltage cable with the corrugated aluminum sheath, the industry gradually increases the research on the high-voltage cable with the smooth aluminum sheath. Although smooth aluminium cover high tension cable possesses a great deal of advantages such as small in structure, light in weight, energy-conservation, economy, environmental protection, very important when the clearance design in the smooth aluminium cover high tension cable, the too big internal structure that leads to in clearance is not hard up the structure unstability, and when the clearance was too little, because the cable conductor layer, insulating layer and shielding layer can expand when moving, finally can lead to the clearance undersize between each layer, can produce the cracked risk of metal sheathing layer.

Therefore, there is a need to provide a high voltage cable to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high tension cable, the metal sheath layer that aims at solving high tension cable among the prior art technical problem that splits that rises easily.

The utility model provides a high-voltage cable, include by interior conductor layer, insulating layer, shielding layer and the protective layer that sets gradually outside to, the protective layer includes semiconduction buffer layer and metal sheathing layer, the semiconduction buffer layer is including laminating inlayer and skin each other, the inlayer is kept away from outer one side with the laminating of shielding layer, the skin is kept away from one side of inlayer with the laminating of metal sheathing layer, the inlayer is semiconduction butyl sticky tape, semiconduction butyl sticky tape is in order to be used for preventing the conductor layer the insulating layer with the expansion of shielding layer rises brokenly the metal sheathing layer.

In an embodiment, the protective layer still includes anticorrosive tie coat, enhancement layer and non-metallic outer jacket layer, the outer wall of metal sheathing layer with the inner wall laminating of anticorrosive tie coat, the outer wall of anticorrosive tie coat with the inner wall laminating of enhancement layer, the outer wall of enhancement layer with the inner wall laminating of non-metallic outer jacket layer, the enhancement layer is the nylon layer, non-metallic outer jacket layer is the high density polyethylene layer.

In one embodiment, the anti-corrosion bonding layer is a hot melt adhesive layer.

In one embodiment, the metal sheath layer is an aluminum alloy sheath layer.

In an embodiment, the conductor layer includes a plurality of corrugated strand blocks and a filler core, and the plurality of corrugated strand blocks are distributed circumferentially around the filler core.

In one embodiment, each of the corrugated strands includes a plurality of first conductive filaments twisted with each other, and the filling core includes a plurality of second conductive filaments twisted with each other, and a twisting direction of the plurality of first conductive filaments is the same as a twisting direction of the plurality of second conductive filaments and is the same as a twisting direction of the cabling.

In an embodiment, an insulating tape is arranged on the outer side of each corrugated strand block, and the insulating tapes of the plurality of corrugated strand blocks are connected in sequence.

In an embodiment, the conductor layer is an aluminum conductor layer, and the first conductive wire monofilament and the second conductive wire monofilament are both aluminum conductive wires.

In one embodiment, the outer layer is a semiconducting buffer tape.

In one embodiment, the protective layer further comprises a conductive layer, the inner wall of the conductive layer is attached to the outer wall of the high-density polyethylene layer, and the conductive layer is a semiconductive polyolefin layer.

In the above scheme, high tension cable includes the conductor layer, insulating layer, shielding layer and the protective layer that set gradually from inside to outside, the protective layer includes semiconduction buffer layer and metal sheathing layer, the semiconduction buffer layer is including laminating inlayer and skin each other, the inlayer is kept away from outer one side with the laminating of shielding layer, the skin is kept away from one side of inlayer with the laminating of metal sheathing layer, the inlayer is semiconduction butyl sticky tape, semiconduction butyl sticky tape is used for preventing the conductor layer the insulating layer with the shielding layer inflation rises brokenly the metal sheathing layer, specifically, when the cable operation the conductor layer the insulating layer with the shielding layer can expand, through improving the semiconduction butyl sticky tape is promptly inside the conductor layer the insulating layer with the shielding layer adopts tensile strength not less than 150MPa the semiconduction butyl sticky tape can effectively restrain their excessive inflation when the operation, prevents that the back clearance of expanding reduces and lead to rise brokenly the metal sheathing layer, and this utility model has the advantage that the metal sheathing layer is not broken by rising.

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, 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 the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a cross section of a high-voltage cable according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a cross section of a corrugated strand block according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a cross section of the filling core according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Conductive layer	2	Insulating layer
3	Shielding layer	11	Corrugated strand block
				111	First conductor monofilament	112	Insulating tape
12	Filling core	121	Second conductive monofilament
				41	Semiconductive buffer layer	411	Semiconductive butyl tape
412	Semiconductive buffer belt	42	Metal sheath layer
				43	Anti-corrosion bonding layer	44	Reinforcing layer
45	Non-metal outer sheath layer	46	Semiconductive polyolefin layer
				100	High-voltage cable

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment mode and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the workpieces, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1, the utility model provides a high-voltage cable 100, include the conductor layer 1 that sets gradually from inside to outside, insulating layer 2, shielding layer 3 and protective layer, the protective layer includes semi-conductive buffer layer 41 and metal sheath layer 42, semi-conductive buffer layer 41 is including laminating inlayer and skin each other, the inlayer is kept away from outer one side and is laminated with shielding layer 3, the outer one side of keeping away from the inlayer is laminated with metal sheath layer 42, the inlayer is semi-conductive butyl sticky tape 411, semi-conductive butyl sticky tape 411 is in order to be used for preventing conductor layer 1, broken metal sheath layer 42 is expanded in insulating layer 2 and 3 inflation of shielding layer, concretely, conductor layer 1 when the cable operation, insulating layer 2 and shielding layer 3 can expand, grasp inside conductor layer 1 through improving semi-conductive butyl sticky tape 411, insulating layer 2 and shielding layer 3, prevent that the inflation back clearance reduces and lead to rise broken metal sheath layer 42, the utility model has the advantage that protection metal sheath layer 42 is not expanded.

Preferably, the semiconductive butyl tape 411 with the tensile strength of more than or equal to 150MPa is adopted, so that excessive expansion of the conductor layer 1, the insulating layer 2 and the shielding layer 3 during operation can be effectively inhibited.

Referring to fig. 1, in an embodiment, the protective layer further includes an anti-corrosion adhesive layer 43, a reinforcing layer 44 and a non-metal outer sheath layer 45, an outer wall of the metal sheath layer 42 is attached to an inner wall of the anti-corrosion adhesive layer 43, an outer wall of the anti-corrosion adhesive layer 43 is attached to an inner wall of the reinforcing layer 44, an outer wall of the reinforcing layer 44 is attached to an inner wall of the non-metal outer sheath layer 45, the reinforcing layer 44 is a nylon layer, the non-metal outer sheath layer 45 is a high-density polyethylene layer, specifically, the mechanical strength of the reinforcing layer 44 and the non-metal outer sheath layer 45 is changed, so that the mechanical strength of the metal sheath layer 42, the reinforcing layer 44 and the non-metal outer sheath layer 45 is sequentially decreased, the bending stress of the high-voltage cable 100 is uniform and excessive, the bending degree of the metal sheath layer 42 can be decreased, the bending resistance is enhanced, and wrinkles generated when the metal sheath layer 42 is bent are reduced.

In order to ensure the mechanical strength of the protective layer, the mechanical strength of the high-density polyethylene layer and the nylon layer cannot be reduced without lower limit, when the Shore hardness of the nylon layer is more than or equal to 67, the tensile strength is more than or equal to 40MPa, the thickness is 1.5 mm-3.0 mm, the Shore hardness of the high-density polyethylene layer is more than or equal to 58, and the tensile strength is more than or equal to 23MPa, the effect is better, and the mechanical strength of the whole protective layer cannot be reduced.

Referring to fig. 1, in an embodiment, the anti-corrosion adhesive layer 43 is a hot melt adhesive layer, and the metal sheath layer 42 and the reinforcing layer 44 can be tightly attached together by disposing the hot melt adhesive layer, and specifically, the hot melt adhesive layer may be disposed by spraying or extruding, and preferably, the extruding manner can further improve the firmness of the bonding.

Referring to fig. 1, in an embodiment, the metal sheath layer 42 is an aluminum alloy sheath layer, and the mechanical property of the metal sheath layer 42 can be enhanced by providing the aluminum alloy sheath layer, so that the risk of cracking the metal sheath layer 42 is reduced.

Referring to fig. 1 to 3, in an embodiment, the conductor layer 1 includes a plurality of corrugated strand blocks 11 and a filler 12, the number of the corrugated strand blocks 11 is plural, and the plurality of corrugated strand blocks 11 are distributed circumferentially around the filler 12, when the cross-sectional area of the high-voltage cable 100 is larger, the ac resistance of the high-voltage cable 100 is larger, which may consume the electric power for transportation, the conductor layer 1 is divided into a plurality of corrugated strand blocks 11 with small areas, which reduces the ac resistance in the cable, improves the economic benefit, and makes production easier by adding the filler 12.

Referring to fig. 1 to 3, in an embodiment, each corrugated strand block 11 includes a plurality of first conductor monofilaments 111, the plurality of first conductor monofilaments 111 are twisted with each other, the filling core 12 includes a plurality of second conductor monofilaments 121, the plurality of second conductor monofilaments 121 are twisted with each other, a twisting direction of the plurality of first conductor monofilaments 111 is the same as a twisting direction of the plurality of second conductor monofilaments 121 and is the same as a twisting direction of the cabling, and by increasing the twisting direction of the monofilaments and the twisting direction of the cabling, a direct current resistance of the conductor is improved, thereby improving economic benefits.

Referring to fig. 1 to 3, in an embodiment, an insulating tape 112 is disposed on an outer side of each corrugated strand block 11, the insulating tapes 112 of the plurality of corrugated strand blocks 11 are sequentially connected, and the insulating tapes 112 are disposed to tightly trap the first conductive monofilament 111, so as to prevent the first conductive monofilament 111 from crushing the high-voltage cable 100, and pre-forming compression is required to eliminate internal stress generated when the corrugated strand blocks 11 are cabled.

Referring to fig. 1, in an embodiment, the conductor layer 1 is an aluminum conductor layer 1, and the first conductive wire monofilament 111 and the second conductive wire monofilament 121 are both aluminum conductive wires, and the aluminum wires are adopted, so that the cost of producing the cable is reduced, and the weight of the finished high-voltage cable 100 is reduced, which is convenient for transportation and operation of operators.

Referring to fig. 1, in an embodiment, the outer layer is a semi-conductive buffer tape 412, and according to the longitudinal water-blocking requirement, the water-blocking semi-conductive buffer tape 412 is adopted to increase the water-blocking performance of the cable.

Referring to fig. 1, in an embodiment, the protective layer further includes a conductive layer, an inner wall of the conductive layer is attached to an outer wall of the high density polyethylene layer, and the conductive layer is a semiconductive polyolefin layer 46, so that compared with the conductive layer of the conventional high voltage cable 100 that is coated with graphite, the semiconductive polyolefin layer 46 has better mechanical strength, and the mechanical protection performance of the high voltage cable 100 is improved.

Above only be the utility model discloses an optional embodiment to do not consequently restrict the utility model discloses a patent range, all be in the utility model discloses a technical idea down, utilize the equivalent structure transform of doing of the contents of description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection scope.

Claims

1. The utility model provides a high-voltage cable, its characterized in that includes by interior conductor layer, insulating layer, shielding layer and the protective layer that sets gradually outside to, the protective layer includes semi-conductive buffer layer and metal sheath layer, the semi-conductive buffer layer is including laminating inlayer and skin each other, the inlayer is kept away from outer one side with the laminating of shielding layer, the skin is kept away from one side of inlayer with the laminating of metal sheath layer, the inlayer is semi-conductive butyl sticky tape, semi-conductive butyl sticky tape is used for preventing the conductor layer the insulating layer with the expansion of shielding layer rises brokenly the metal sheath layer.

2. The high-voltage cable according to claim 1, wherein the protective layer further comprises an anti-corrosion bonding layer, an enhancement layer and a non-metal outer sheath layer, the outer wall of the metal sheath layer is attached to the inner wall of the anti-corrosion bonding layer, the outer wall of the anti-corrosion bonding layer is attached to the inner wall of the enhancement layer, the outer wall of the enhancement layer is attached to the inner wall of the non-metal outer sheath layer, the enhancement layer is a nylon layer, and the non-metal outer sheath layer is a high-density polyethylene layer.

3. The high voltage cable of claim 2, wherein the corrosion resistant bonding layer is a hot melt adhesive layer.

4. The high-voltage cable according to claim 2, wherein the metal sheath layer is an aluminum alloy sheath layer.

5. The high-voltage cable according to claim 1, wherein the conductor layer includes a plurality of corrugated strand pieces and a filler core, and a plurality of the corrugated strand pieces are circumferentially distributed around the filler core.

6. The high voltage cable of claim 5, wherein each of the corrugated strands includes a plurality of first conductor filaments twisted about one another, and wherein the filler core includes a plurality of second conductor filaments twisted about one another, the plurality of first conductor filaments being twisted about the same direction as the plurality of second conductor filaments and about the same direction as the stranding direction of the cabling.

7. The high-voltage cable according to claim 6, wherein an insulating tape is disposed on an outer side of each of the corrugated strand blocks, and the insulating tapes of the plurality of corrugated strand blocks are sequentially connected.

8. The high voltage cable of claim 7, wherein the conductor layer is an aluminum conductor layer, and the first and second conductive monofilaments are both aluminum conductive wires.

9. The high voltage cable of any one of claims 1-8, wherein the outer layer is a semiconducting buffer tape.

10. The high voltage cable of claim 2, wherein the protective layer further comprises a conductive layer, wherein an inner wall of the conductive layer is attached to an outer wall of the high density polyethylene layer, and the conductive layer is a semiconductive polyolefin layer.