CN210743666U

CN210743666U - Metal band shielding high-voltage power cable with tenon-and-mortise structure

Info

Publication number: CN210743666U
Application number: CN201920900174.1U
Authority: CN
Inventors: 陆正荣; 唐芸; 丁亮; 蒋成芳; 李春辉
Original assignee: Jiangsu Weida Cable Co ltd; Samson Cable Co ltd
Current assignee: Jiangsu Weida Cable Co ltd; Samson Cable Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-06-12
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a tenon-and-mortise structure metal band shielding high-voltage power cable, which comprises eight parts, namely a conductor, a conductor shield, insulation, an insulation shield, a semiconductive buffer layer, a tenon-and-mortise structure metal band shield, an aluminum-plastic comprehensive waterproof layer and an outer sheath; the metal band shield with the mortise and tenon structure comprises a circular tenon, a tenon neck, a circular mortise and a tenon buckle; the metal band shielding of the tenon-and-mortise structure is formed by tightly winding a plurality of metal bands, the round tenon head and the round mortise of two adjacent metal band shielding of the tenon-and-mortise structure are occluded with each other, the tenon buckle and the tenon neck are buckled to form a whole, and the metal band shielding, the steel band armoring and the steel wire armoring have three functions of metal shielding, steel wire armoring, and have more excellent bending performance and electrical conduction performance between insulating shielding, more compact structure and lower cost compared with the existing high-voltage cable corrugated aluminum sleeve metal shielding.

Description

Metal band shielding high-voltage power cable with tenon-and-mortise structure

Technical Field

The utility model relates to a tenon fourth of twelve earthly branches structure strap shielding high voltage power cable especially provides one kind and possesses metal shielding, strap armor, wire armor function in the tenon fourth of twelve earthly branches structure strap shielding high voltage power cable of an organic whole simultaneously, has more excellent than the crooked compliance of current high voltage cable wrinkle aluminium sheath metallic shield, has resistance to compression, tensile functional advantage simultaneously.

Background

The high-voltage and ultrahigh-voltage power cables mainly comprise 110kV, 220kV and 500kV cables which respectively execute GB/T11017, GB/T18890 and GB/T22078 standards, and metal shielding of the cables mainly comprises two structures, namely a corrugated aluminum sheath and an extruded lead sheath according to standard requirements; the lead sheath adopts a flat tube structure and lead has weak mechanical property, so that the compression resistance and the tensile property are not optimistic; the corrugated aluminum sheath structure adopts a cold-rolled corrugated tube structure, so that the compression resistance and the bending property of a metal shielding layer are improved, but the service life of the cable is directly influenced due to the reasons that the electrical contact between the wave crest of the corrugated tube and an insulation shield is poor, the heat dissipation of the cable is difficult due to stagnant air which does not flow in the wave crest, the running temperature of the cable is high and the like, and the corrugated aluminum sheath structure becomes a structural quality hidden danger known in the industry at present; based on the above-mentioned high voltage, super high voltage cable's problem, need to have one kind and possess simultaneously strap armor resistance to compression function, wire armor tensile function, soft easily flexible, and with the good electrical contact of cable insulation semi-conductive shielding, a compact structure, with low costs novel metal shielding structure high voltage cable.

Disclosure of Invention

To the problem and the defect, the utility model provides a possess strap armor resistance to compression function, wire armor tensile function, soft flexible simultaneously, and with the good electrical contact of cable insulation semi-conductive shielding, a novel metal shielding structure high tension cable of compact structure, with low costs.

The technical scheme of the utility model is that: a tenon-and-mortise structure metal band shielding high-voltage power cable comprises a conductor, a conductor shield, an insulator, an insulation shield, a semi-conductive buffer layer, a tenon-and-mortise structure metal band shield, an aluminum-plastic comprehensive waterproof layer and an outer sheath.

The metal band shield with the tenon-and-mortise structure comprises a circular tenon, a tenon neck, a circular mortise and a tenon buckle; the metal band shielding of the tenon-and-mortise structure is formed by tightly winding a plurality of metal bands, the round tenons and the round mortises of the two adjacent metal band shielding of the tenon-and-mortise structure are occluded with each other, and the tenon buckles and the tenon necks are buckled to form a whole.

The upper edge and the lower edge of the metal band shield of the tenon-and-mortise structure are of arc structures, the diameter of the arc of the lower edge is 1mm smaller than that of the semiconductive buffer layer, and the metal band shield of the tenon-and-mortise structure is in interference fit with the semiconductive buffer layer, so that the metal band shield of the tenon-and-mortise structure is in good electrical contact with the insulation shield through the semiconductive buffer layer to homogenize an; the diameter of the upper arc is consistent with the inner diameter of the aluminum-plastic comprehensive waterproof layer, and the radial waterproof effect is achieved.

Compared with the prior art, the utility model discloses an innovation effect is: (1) the metal band shielding with the tenon-and-mortise structure adopts a metal band winding shielding structure, has the same tensile capacity as a metal wire armor, and has better tensile property compared with the corrugated aluminum sleeve metal shielding in the prior art; (2) the metal band shielding with the tenon-and-mortise structure adopts a metal band densely-arranged winding structure, has the same compressive capacity as metal band armoring, and has better compressive property compared with the lead sleeve flat tube metal shielding in the prior art; (3) the metal band shielding with the tenon-and-mortise structure adopts the adjacent buckling of the tenon-and-mortise structure to form a round and smooth inner circular surface which is in good electrical contact with the semi-conductive buffer layer, so that the effect of homogenizing an electric field is achieved, and the defect that the corrugated aluminum sleeve metal shielding wave crest cannot be in good electrical contact with the semi-conductive buffer layer is overcome; (4) the metal band shielding of the tenon-and-mortise structure adopts the tenon-and-mortise structure to spirally wind and buckle, and compared with the corrugated aluminum sleeve metal shielding and the lead sleeve metal shielding in the prior art, the metal band shielding has incomparable bending flexibility.

Drawings

In order that the present invention may be more clearly understood, the following detailed description of the present invention is provided in terms of specific examples taken in conjunction with the accompanying drawings, in which:

fig. 1 is the structure schematic diagram of the utility model, fig. 2 is the structure schematic diagram of the semi-finished product of tenon fourth of twelve earthly branches structure strap shielding.

The reference numbers in the drawings are as follows: the novel conductive connector comprises a conductor (1), a conductor shield (2), insulation (3), an insulation shield (4), a semi-conductive buffer layer (5), a metal band shield (6) with a mortise and tenon structure, a circular tenon (61), a tenon neck (62), a circular mortise (63), a tenon buckle (64), an aluminum-plastic comprehensive waterproof layer (7) and an outer sheath (8).

Detailed Description

Referring to fig. 1 and 2, the metal band shielding high-voltage power cable with the tenon-and-mortise structure comprises eight parts, namely a conductor (1), a conductor shield (2), an insulator (3), an insulation shield (4), a semi-conductive buffer layer (5), a metal band shield with the tenon-and-mortise structure (6), an aluminum-plastic comprehensive waterproof layer (7) and an outer sheath (8).

The metal band shield (6) with the tenon-and-mortise structure comprises a circular tenon (61), a tenon neck (62), a circular mortise (63) and a tenon buckle (64); wherein two tenon buckles (64) about tenon fourth of twelve earthly branches structure metal band shielding (6) are the open mode before the winding to in circular tenon (61) embedding circular tongue-and-groove (63) of adjacent tenon fourth of twelve earthly branches structure metal band shielding (6) are processed in the winding of tenon fourth of twelve earthly branches structure metal band shielding (6), and along with progressively reducing of winding doubling mould aperture, the mould inner wall is constantly to tenon buckle (64) the deformation of exerting pressure of opening, finally with tenon buckle (64) deformation embedding tenon neck (62) position, form a tenon fourth of twelve earthly branches structure.

The metal band shielding structure of the tenon-and-mortise structure (6) is formed by tightly winding a plurality of metal bands, the round tenon (61) and the round mortise (63) of the two adjacent metal band shielding structures of the tenon-and-mortise structure (6) are mutually occluded, and the tenon buckle (64) and the tenon neck (62) are mutually buckled to form a whole.

The upper edge and the lower edge of the metal band shield (6) with the tenon-and-mortise structure are of arc structures, the diameter of the arc of the lower edge is 1mm smaller than that of the semiconductive buffer layer (5), and the lower edge of the metal band shield and the semiconductive buffer layer (5) form interference fit, so that the metal band shield (6) with the tenon-and-mortise structure forms good electrical contact with the insulating shield (4) through the semiconductive buffer layer (5), and an electric field is homogenized; the diameter of the upper arc is consistent with the inner diameter of the aluminum-plastic comprehensive waterproof layer (7), and the radial waterproof effect is achieved.

The working principle is as follows: as shown in fig. 1 and fig. 2, in the first step: stranding a plurality of monofilaments into a compacted circular conductor (1); the second step is that: processing a conductor shield (2), an insulator (3) and an insulation shield (4) outside the conductor by adopting a three-layer co-extrusion crosslinking process to form an insulation wire core of the cable; the third step: a semi-conductive buffer layer (5) is wrapped outside the insulated wire core; the fourth step: uniformly arranging the semi-finished product of the metal band shielding (6) with the tenon-and-mortise structure produced in advance around the semi-conductive buffer layer (5) in an end-to-end connection mode according to the circular tenon (61) and the circular mortise (63); the fifth step: along with shielding (6) of tenon fourth of twelve earthly branches structure strap is around semiconduction buffer layer (5) winding operation, the shielding (6) of tenon fourth of twelve earthly branches structure strap gets into doubling mould, the doubling mould hole is circular cone type structure, along with constantly reducing of doubling mould hole external diameter, mould inner wall circumference power is in circular tenon (61) the shielding (6) of tenon fourth of twelve earthly branches structure strap embedding circular mortise (63) of adjacent tenon fourth of twelve earthly branches structure strap shielding (6), mould inner wall radial force will constantly exert pressure to tenon knot (64) of opening and warp, finally with tenon knot (64) deformation embedding tenon neck (62) position, form a tenon fourth of twelve earthly branches structure. And a sixth step: the aluminum-plastic comprehensive waterproof layer (7) is longitudinally wrapped outside the metal band shield (6) with the tenon-and-mortise structure which is buckled end to end, and the outer sheath (8) structure is wrapped in an extruded mode, so that the radial waterproof and mechanical protection effects are achieved.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it is understood that the above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high voltage power cable is shielded to tenon fourth of twelve earthly branches structure strap which characterized in that: the novel conductive cable comprises eight parts, namely a conductor (1), a conductor shield (2), an insulator (3), an insulation shield (4), a semi-conductive buffer layer (5), a tenon-and-mortise structure metal band shield (6), an aluminum-plastic comprehensive waterproof layer (7) and an outer sheath (8); processing a conductor shield (2), an insulation (3) and an insulation shield (4) outside the conductor (1) by adopting a three-layer co-extrusion crosslinking process to form an insulation wire core of the cable; a semi-conductive buffer layer (5) is wrapped outside the insulated wire core; the metal band shield (6) with the tenon-and-mortise structure is wound around the semi-conductive buffer layer (5) and is uniformly arranged; the tenon-and-mortise structure metal band shield (6) is longitudinally wrapped with an aluminum-plastic comprehensive waterproof layer (7) and is extruded with an outer sheath (8) structure.

2. The metal band shielding high-voltage power cable with the mortise and tenon structure according to claim 1, wherein: the metal band shield (6) with the mortise and tenon structure comprises a circular tenon (61), a tenon neck (62), a circular mortise (63) and a tenon buckle (64); the metal band shielding structure of the tenon-and-mortise structure (6) is formed by tightly winding a plurality of metal bands, the round tenon (61) and the round mortise (63) of the two adjacent metal band shielding structures of the tenon-and-mortise structure (6) are mutually occluded, and the tenon buckle (64) and the tenon neck (62) are mutually buckled to form a whole.

3. The metal band shielding high-voltage power cable with the mortise and tenon structure according to claim 1, wherein: the upper and lower sides of the metal band shield (6) with the tenon-and-mortise structure are of arc structures, the diameter of the lower arc is 1mm smaller than that of the semiconductive buffer layer (5), and the diameter of the upper arc is consistent with the inner diameter of the aluminum-plastic comprehensive waterproof layer (7).