CN211742747U - Water-blocking overhead insulated cable - Google Patents

Abstract

A water-blocking overhead insulated cable comprises a wire, an insulating layer, a shielding layer and a reinforcing layer which are sequentially arranged from inside to outside, wherein the reinforcing layer comprises a tubular reinforcing layer body, a first partition plate and a second partition plate which are arranged in a crossed mode are arranged in the reinforcing layer body, the reinforcing layer body is divided into four cavities by the first partition plate and the second partition plate, the wire is respectively arranged in the cavities, the shielding layer wraps the outer side of the insulating layer, and a lubricating layer is arranged between the shielding layer and the cavities; the outside of enhancement layer parcel has the second water-resistant layer, and the outside of second water-resistant layer is equipped with first water-resistant layer. The first water-resisting layer is provided with drain holes, the drain holes comprise four first drain holes which are uniformly distributed along the circumferential direction of the first water-resisting layer, an arc-shaped second drain hole is communicated between every two adjacent first drain holes, and a second drain hole is also communicated between the other two drain holes. The utility model discloses simple structure, in blocking external water that can be fine and immerging the cable, damage the cable.

Description

Water-blocking overhead insulated cable

Technical Field

The utility model belongs to the technical field of the cable, especially, relate to an aerial insulated cable blocks water.

Background

The overhead insulated cable has the characteristics of simple structure, low manufacturing cost, convenience in laying, reliability in operation and low maintenance cost, is widely applied to urban power grids, rural house entrance lines, building dense areas and areas with tall trees and dense areas, and plays a vital role as a central part of a power grid system. Because the conductor of the cable is formed by twisting a plurality of strands of round wires, gaps inevitably exist among the wires, and the gaps penetrate along the length direction of the cable. Under general conditions, the overhead insulated cable runs in an overhead mode outdoors, rainwater enters a gap through a cable terminal or an intermediate connector, and water easily enters the end of the overhead insulated cable in the construction and installation process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the poor problem of overhead insulated cable water blocking performance, provide an overhead insulated cable blocks water, include wire, insulating layer, enhancement layer and the shielding layer that sets gradually from inside to outside, the wire is a plurality of copper core group one-tenth, and the material of insulating layer is polyvinyl chloride insulating material, and polyvinyl chloride insulating material has better mechanical properties, and tensile strength is big, and impact strength is high, has fine fire-retardant insulating properties, has simultaneously and has excellent dielectric property. The enhancement layer material is PET plastics, and the enhancement layer includes becomes pipy enhancement layer body, this internal first baffle and the second baffle that is equipped with cross arrangement of enhancement layer, four cavities are cut apart into with the enhancement layer body to first baffle and second baffle, the wire sets up respectively in four cavities, and the inboard parcel wire of insulating layer, the outside parcel of insulating layer have the shielding layer, and the shielding layer constitutes for netted metal, plays the effect that external shielding signal disturbed. A lubricating layer is arranged between the shielding layer and the cavity, the lubricating layer is made of talcum powder, and the talcum powder has lubricating property. The reinforcing layer has a protective effect on the wires, and the wires can slide relatively in the cavity under the lubricating effect of the lubricating layer without damaging other protective layers in the cable. The outside parcel of enhancement layer has the second water-blocking layer, and the material on second water-blocking layer is canvas winding layer, and canvas has dampproofing and waterproofing's performance, plays waterproof effect that can be fine. And a first waterproof layer is arranged on the outer side of the second waterproof layer, and the first waterproof layer is made of high-temperature-resistant insulating rubber. The first water-blocking layer is tubular, the drain holes are formed in the first water-blocking layer and comprise four first drain holes which are uniformly distributed along the circumferential direction of the first water-blocking layer, an arc-shaped second drain hole is communicated between any two adjacent first drain holes, a second drain hole is also communicated between the other two first drain holes, the first drain holes and the second drain holes are arranged in parallel with the wires in the overhead insulated cable, and external rainwater flows out through the second drain holes and the first drain holes after being immersed into the first water-blocking layer, so that the rainwater is prevented from continuously immersing into the wires, and the overhead insulated cable is further damaged.

The scheme has the following advantages:

the arrangement of the first drainage hole and the second drainage hole on the first waterproof layer can collect rainwater immersed in the first waterproof layer and discharge the rainwater to the outside of the overhead insulated cable through the first drainage hole or the second drainage hole, so that the rainwater immersed in the first waterproof layer can be prevented from being continuously immersed in a lead in the overhead insulated cable, and the overhead insulated cable is prevented from being damaged; the setting of enhancement layer plays the effect of protection wire, and during cable construction, the enhancement layer receives traction force, has avoided the wire to take place to deform because of the atress even by the tear, and secondly the talcum powder that sets up can play the lubrication action for the wire in the cavity, and the wire expend with heat and contract with cold can take place the displacement change smoothly in the cavity, has avoided damaging other inoxidizing coatings of cable.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic sectional structure of the present invention;

FIG. 3 is a schematic view of the reinforcing layer structure of the present invention;

fig. 4 is a schematic structural diagram of the shielding layer of the present invention;

fig. 5 is a schematic structural view of the first water-blocking layer of the present invention.

Reference numerals: 1. a wire; 2. an insulating layer; 3. a shielding layer; 4. a lubricating layer; 5. a reinforcing layer; 6. a second water resistant layer; 7. a first water resistant layer; 51. a reinforcement layer body; 52. a first separator; 53. a second separator; 54. a chamber; 71. a drain hole; 711. a first drain hole; 712. a second drain hole.

Detailed Description

As shown in fig. 1-5, a water-blocking aerial insulated cable comprises a conductor 1, an insulating layer 2, a shielding layer 3 and a reinforcing layer 5 which are sequentially arranged from inside to outside, wherein the conductor 1 is composed of a plurality of copper wire cores, the insulating layer 2 is made of polyvinyl chloride insulating material, and the polyvinyl chloride insulating material has good mechanical property, high tensile strength, high impact strength, good flame-retardant insulating property and excellent dielectric property. The material of enhancement layer 5 is PET plastics, and enhancement layer 5 is equipped with first baffle 52 and the second baffle 53 of cross arrangement including becoming tubulose enhancement layer body 51 in the enhancement layer body 51, four cavities 54 are cut apart into with enhancement layer body 51 to first baffle 52 and second baffle 53, wire 1 sets up respectively in four cavities 54, and the inboard parcel wire 1 of insulating layer 2, the outside parcel of insulating layer 2 has shielding layer 3, and shielding layer 3 constitutes for netted metal, plays the effect that external shielding signal disturbed. A lubricating layer 4 is arranged between the shielding layer 3 and the cavity, and the lubricating layer 4 is made of talcum powder which has lubricating property. The reinforcing layer 5 has a protective effect on the conductor 1, and the conductor 1 can slide relatively in the cavity 54 under the lubricating effect of the lubricating layer 4 without damaging other protective layers inside the cable. The outside parcel of enhancement layer 5 has second water-blocking layer 6, and the material of second water-blocking layer 6 is canvas winding layer, and canvas has dampproofing and waterproofing's performance, plays waterproof effect that can be fine. And a first water resisting layer 7 is arranged on the outer side of the second water resisting layer 6, and the first water resisting layer 7 is made of high-temperature-resistant insulating rubber. The first waterproof layer 7 is tubular, the drain hole 71 is formed in the first waterproof layer 7, the drain hole 71 comprises four first drain holes 711 which are uniformly distributed along the circumferential direction of the first waterproof layer 7, an arc-shaped second drain hole 712 is communicated between any two adjacent first drain holes 711, a second drain hole 712 is also communicated between the other two first drain holes 711, the first drain holes 711 and the second drain holes 712 are arranged in parallel with the lead 1 in the overhead insulated cable, and after external rainwater is immersed in the first waterproof layer 7, the rainwater is prevented from continuously immersing the lead 1 and further damaging the overhead insulated cable.

The use process comprises the following steps:

the utility model discloses by wire 1, insulating layer 2, shielding layer 3, lubricating layer 4, enhancement layer 5, second water-resistant layer 6 and the first water-resistant layer 7 that interior to exterior set gradually. Insulating layer 2 plays insulating role to wire 1, and shielding layer 3 plays the effect of shielding external interference signal to wire 1, and lubricating layer 4 can let wire 1 free stretch out and draw back in enhancement layer 5, has avoided tearing the wire apart because of external traction force. The reinforcing layer 5 is provided to protect the wires. The arrangement of the first waterproof layer 7 can collect rainwater and discharge the rainwater from the first drain hole 711 and the second drain hole 712 in time when the rainwater is immersed in the first waterproof layer 7, so that the rainwater is prevented from being immersed in the wire 1 inside the overhead insulated cable, and the wire 1 is further damaged. The second waterproof layer 6 is arranged to further play a role in preventing moisture and water.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims (7)

1. The utility model provides an overhead insulated cable blocks water, includes wire, insulating layer, shielding layer and the enhancement layer that sets gradually from inside to outside, its characterized in that: the reinforcing layer comprises a tubular reinforcing layer body, a first partition plate and a second partition plate are arranged in the reinforcing layer body in a crossed mode, the reinforcing layer body is divided into four cavities by the first partition plate and the second partition plate, the wires are arranged in the cavities respectively, the inner side of the insulating layer wraps the wires, the outer side of the insulating layer wraps the shielding layer, and a lubricating layer is arranged between the shielding layer and the cavities; and a second water-resistant layer is wrapped on the outer side of the reinforcing layer, and a first water-resistant layer is arranged on the outer side of the second water-resistant layer.

2. A water-blocking overhead insulated cable according to claim 1, characterized in that: the first water-resistant layer is tubular, drain holes are formed in the first water-resistant layer and comprise four first drain holes which are uniformly distributed along the circumferential direction of the first water-resistant layer, an arc-shaped second drain hole is communicated between any two adjacent first drain holes, and a second drain hole is also communicated between the other two first drain holes.

3. A water-blocking overhead insulated cable according to claim 2, characterized in that: the first water resisting layer is made of high-temperature-resistant insulating rubber; the second waterproof layer is made of a waterproof canvas winding layer.

4. A water-blocking overhead insulated cable according to claim 3, characterized in that: the insulating layer is made of polyvinyl chloride insulating material.

5. A water-blocking aerial insulated cable according to claim 4, characterized in that: the reinforcing layer is made of PET plastic.

6. A water-blocking aerial insulated cable according to claim 5, characterized in that: the lubricating layer is made of talcum powder.

7. A water-blocking aerial insulated cable according to claim 6, characterized in that: the shielding layer is made of reticular metal.

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