CN217767925U

CN217767925U - Full-water-blocking cable

Info

Publication number: CN217767925U
Application number: CN202221332409.XU
Authority: CN
Inventors: 郑瑜; 许军; 梁马超; 王立; 吴晴; 陈梦; 陈梦迪
Original assignee: Aerospace Electric Group Co ltd; Aerospace Rich Cable Co ltd
Current assignee: Aerospace Electric Group Co ltd; Aerospace Rich Cable Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-11-08
Anticipated expiration: 2032-05-26

Abstract

The utility model discloses a full water-blocking cable, belonging to the technical field of cables; it comprises the following steps: the insulation wire core and the radial waterproof layer; the insulating wire core comprises single conductors and water-blocking yarns, and a plurality of single conductors and the water-blocking yarns are mutually twisted to form a twisted body; the radial waterproof layer comprises a water blocking tape and an aluminum-plastic composite tape, the water blocking tape is wound on the insulating wire cores, the aluminum-plastic composite tape longitudinally wraps the water blocking tape, and two side edges of the aluminum-plastic composite tape in the width direction are fixedly connected and form a closed loop which surrounds the insulating wire cores. The utility model discloses can realize carrying out radial and fore-and-aft blocking water to the cable, prevent that the cable from being destroyed.

Description

Full-water-blocking cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a cable blocks water entirely.

Background

The faults generated in the conventional cable using process are generally two types: overload and water ingress; overload generally can protect the safety of cable through overload protection equipment, and because the cable is hidden to intake water and is difficult to discover, therefore the harm that produces is the biggest. The phenomenon of 'water tree aging' can take place under the effect of electromagnetic field after the cable intakes, and the cable damages and only can be the time problem, can lead to the cable to puncture unable the use finally, can only lay new cable again and replace, causes huge economic loss.

The invention with the publication number of CN202650695U discloses a longitudinal waterproof power cable, which comprises a cable core, wherein the cable core comprises a conductor, an insulating layer and an inner waterproof layer which are sequentially arranged, the conductor is a copper core or a tinned copper core, the insulating layer is a polyethylene insulating layer, the inner waterproof layer is a waterproof inner belt, an outer waterproof layer is wrapped outside the cable core, the outer waterproof layer is a waterproof yarn outer waterproof layer, a shielding layer and a sheath layer are sequentially wrapped outside the outer waterproof layer, the shielding layer is a copper wire braided shielding layer, a waterproof rope is filled between the outer waterproof layer and the shielding layer, and the sheath layer is a crosslinked polyethylene sheath layer.

The existing waterproof cable has limited waterproof effect and is easy to cause breakdown of the cable.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a fully waterproof cable, which solves the problem of poor waterproof effect of the existing waterproof cable.

The utility model provides a cable blocks water entirely, include: the insulation wire core and the radial waterproof layer;

the insulating wire core comprises single conductors and water-blocking yarns, and a plurality of single conductors and the water-blocking yarns are mutually twisted to form a twisted body;

the radial waterproof layer comprises a water blocking tape and an aluminum-plastic composite tape, the water blocking tape is wound on the insulating wire cores, the aluminum-plastic composite tape is longitudinally wrapped on the water blocking tape, and edges of two sides of the aluminum-plastic composite tape in the width direction are fixedly connected to form a closed loop which surrounds the insulating wire cores.

Furthermore, the insulating wire core further comprises a conductor shielding layer, an insulating layer and an insulating shielding layer which are nested from inside to outside, and the conductor shielding layer is arranged outside the stranded body in a surrounding mode.

Furthermore, the conductor shielding layer is extruded on the stranded body, the insulating layer is extruded on the conductor shielding layer, and the insulating shielding layer is extruded on the insulating layer.

Furthermore, a metal shielding layer is arranged between the insulating shielding layer and the water blocking tape, and the metal shielding layer is composed of a semi-conducting tape, a copper wire and a copper tape.

Furthermore, the semi-conductive belt is wound on the insulating shielding layer, the copper wire is loosely wound on the semi-conductive belt, the copper belt is reversely tied on the copper wire, and the water blocking belt is wound on the copper belt.

Furthermore, the outside of radial waterproof layer is equipped with the inner liner, the inner liner crowded package in on the compound area of aluminium-plastic.

Furthermore, be equipped with the armor outside the inside lining layer, the armor includes the brass band, the brass band around wrap in on the inside lining layer.

Furthermore, a wrapping tape layer is arranged outside the armor layer and comprises a flame-retardant tape, and the flame-retardant tape is wrapped outside the brass band.

Furthermore, be equipped with the restrictive coating outside the band layer, the restrictive coating is crowded package on fire-retardant area.

Furthermore, a rat and ant prevention layer is coated on the sheath layer.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

(1) The utility model discloses a cable blocks water entirely is equipped with radial waterproof layer in insulation core's outside, and radial waterproof layer includes water-blocking tape and aluminum-plastic composite tape, and the water-blocking tape is around wrapping on insulation core, and water-blocking tape water absorption expansion can prevent water to continue along radial invasion, and the protection cable does not receive destruction. The aluminum-plastic composite belt is longitudinally wrapped on the water blocking belt, edges of two sides in the aluminum-plastic composite width direction are fixedly connected and form a closed loop sleeve surrounding the insulating wire core, and the closed loop sleeve is completely sealed in the circumferential direction, so that good radial water blocking can be realized, and the cable is prevented from being damaged.

(2) The utility model discloses a cable blocks water entirely, insulating core include the monomer wire and block water the yarn, many monomer wires with block water and intertwist each other between the yarn and form the hank body. The single conductors can generate larger pressure during twisting, the water blocking yarns are cut and filled into gaps among the single conductors by the pressure, and meanwhile, the water blocking yarns are also twisted on the surface of a twisted body. The water blocking yarns can absorb water to expand, so that the intruding water is locked in a twisting pitch, the cable achieves the effect of water blocking in the longitudinal direction, and the cable is prevented from being damaged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a schematic cross-sectional view of the entire device;

in the figure, an insulated wire core 10, a single conductor 11, a water-blocking yarn 12, a conductor shielding layer 13, an insulating layer 14, an insulating shielding layer 15, a radial waterproof layer 20, a water-blocking tape 21, an aluminum-plastic composite tape 22, a metal shielding layer 30, an inner lining layer 40, an armor layer 50, a belting layer 60, a sheath layer 70 and a rat and ant prevention layer 80 are arranged.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1, a fully water-blocking cable in the embodiment includes: an insulated wire core 10 and a radial waterproof layer 20; the insulated wire core 10 comprises single conductors 11 and water-blocking yarns 12, and a plurality of single conductors 11 and the water-blocking yarns 12 are twisted with each other to form a twisted body. The individual wires 11 generate a large pressure during twisting, and the pressure cuts and fills the water-blocking yarns 12 into the gaps between the individual wires 11, and simultaneously the water-blocking yarns 12 are twisted on the surface of the twisted body. The water blocking yarns 12 can absorb water to swell and lock the invading water in a twisting pitch, so that the cable achieves the water blocking effect in the longitudinal direction and is prevented from being damaged.

The radial waterproof layer 20 comprises a water blocking tape 21 and an aluminum-plastic composite tape 22, the water blocking tape 21 wraps the insulating wire core 10, and the water blocking tape 21 absorbs water to expand, so that water can be prevented from continuously invading in the radial direction, and the cable is protected from being damaged. The aluminum-plastic composite belt 22 longitudinally wraps the water blocking belt 21, two side edges of the aluminum-plastic composite belt 22 in the width direction are fixedly connected to form a closed loop sleeve enclosing the insulated wire core 10, and the closed loop sleeve is completely sealed in the circumferential direction, so that good radial water blocking can be realized, and the cable is prevented from being damaged.

When the cable contacts with water, the aluminum-plastic composite belt 22 and the water blocking belt 21 act firstly, the aluminum-plastic composite belt 22 with the closed-loop structure can prevent water from invading into the insulated wire core 10, the water blocking belt 21 absorbs water to expand, and further water is prevented from invading into the insulated wire core 10 radially. When water invades into the insulated wire core 10, the water blocking yarn 12 absorbs water and expands, so that the invaded water is locked in a twisting pitch, the cable achieves the water blocking effect in the longitudinal direction, and the cable is prevented from being damaged.

The insulated wire core 10 further comprises a conductor shielding layer 13, an insulating layer 14 and an insulated shielding layer 15 which are nested from inside to outside, and the conductor shielding layer 13 is arranged outside the stranded body in a surrounding mode. In the specific implementation process, the cross-linked semiconductive shielding material is uniformly extruded on the stranded body to form the conductor shielding layer 13, the cross-linked semiconductive shielding material is specifically polyethylene, and the resistivity of the conductor shielding layer 13 is less than 1000 Ω · m. An insulating material such as epoxy resin, diphenyl ether, silicone, or PC material is uniformly extruded on the conductor shield layer 13 to form an insulating layer 14. The cross-linked semi-conductive shielding material is evenly extruded on the insulating layer 14 to form an insulating shielding layer 15, the cross-linked semi-conductive shielding material is cross-linked alkene or cross-linked lipid substances, and the resistivity of the insulating shielding layer 15 is less than 500 omega. It should be noted that: the conductor shielding layer 13, the insulating layer 14 and the insulating shielding layer 15 are extruded in a three-layer co-extrusion manner.

A metal shielding layer 30 is arranged between the insulating shielding layer 15 and the water blocking tape 21, and the metal shielding layer 30 is composed of a semi-conducting tape, a copper wire and a copper tape. The semi-conductive belt is wrapped on the insulating shielding layer 15, the copper wire is sparsely wrapped on the semi-conductive belt, the copper wire is reversely tied on the copper wire, and the water blocking belt 21 is wrapped on the copper belt. The metal shielding layer 30 can shield the electromagnetic waves, so that the inner conductor is not interfered by the external electromagnetic waves.

The outside of radial waterproof layer 20 is equipped with inner liner 40, and halogen-free low smoke flame retardant B1 level material is crowded package and is formed inner liner 40 on aluminium-plastic composite belt 22, and inner liner 40 can fill the clearance between radial waterproof layer 20 and the armor 50 to guarantee certain low smoke and fire behaviour.

The armor layer 50 is arranged outside the inner liner layer 40, the armor layer 50 comprises a brass band, the brass band is wrapped on the inner liner layer 40, and the armor layer 50 can enhance the limit of radial pressure borne by the cable.

Armor 50 is equipped with band layer 60 outward, and band layer 60 includes fire-retardant area, and fire-retardant area is around wrapping in the brass outband, and fire-retardant area can be fire prevention fire-retardant for the cable is fire-resistant fire-retardant more.

The sheath layer 70 is arranged outside the wrapping tape layer 60, halogen-free low-smoke flame-retardant B1-grade materials are extruded and wrapped on the flame-retardant tape to form the sheath layer 70, and the sheath layer 70 can isolate the inside and the outside of the cable and enhance the strength and the hardness of the cable.

The sheath layer 70 is coated with a rat-proof and ant-proof layer 80, and the rat-proof and ant-proof layer 80 is a halogen-free low-smoke flame-retardant B1-grade material added with a rat-proof and ant-proof agent.

It should be noted that: the halogen-free low-smoke flame-retardant B1-grade material can be a polystyrene material, a phenolic resin material, a polyurethane material or a foam glass material.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A fully water-blocking cable, comprising: the insulation wire core and the radial waterproof layer;

2. The all-water-blocking cable according to claim 1, wherein the insulated wire core further comprises a conductor shielding layer, an insulating layer and an insulated shielding layer which are nested from inside to outside, and the conductor shielding layer is arranged outside the stranded body in a surrounding manner.

3. A water-blocking cable as claimed in claim 2, wherein the conductor shield is extruded onto the strand, the insulation layer is extruded onto the conductor shield, and the insulation shield is extruded onto the insulation layer.

4. The all-water-blocking cable according to claim 3, wherein a metal shielding layer is arranged between the insulating shielding layer and the water-blocking tape, and the metal shielding layer is composed of a semi-conductive tape, a copper wire and a copper tape.

5. The fully water-blocking cable according to claim 4, wherein the semi-conductive tape is wrapped on the insulation shielding layer, the copper wire is loosely wrapped on the semi-conductive tape, the copper tape is reversely tied on the copper wire, and the water-blocking tape is wrapped on the copper tape.

6. A water-blocking cable as claimed in claim 5, wherein an inner liner is provided outside the radial waterproof layer, and the inner liner is extruded on the aluminum-plastic composite tape.

7. The all-water-blocking cable according to claim 6, wherein an armor layer is arranged outside the inner liner layer, the armor layer comprises brass bands, and the brass bands are wrapped on the inner liner layer.

8. The all-water-blocking cable according to claim 7, wherein a wrapping tape layer is arranged outside the armor layer, the wrapping tape layer comprises a flame-retardant tape, and the flame-retardant tape is wrapped outside the brass tape.

9. The fully water-blocking cable according to claim 8, wherein a sheath layer is disposed outside the wrapping layer, and the sheath layer is extruded on the flame-retardant tape.

10. A water-blocking cable as claimed in claim 9, wherein the sheath layer is coated with a rat and termite resistant layer.