CN209822361U - Flame-retardant high-voltage transmission cable - Google Patents

Abstract

The utility model relates to the technical field of high-voltage transmission cables, in particular to a flame-retardant high-voltage transmission cable, which comprises a protective layer, wherein a waterproof layer is arranged at the inner side of the protective layer, a flame-retardant separation belt is arranged at the inner side of the waterproof layer, a mica tape is arranged on the surface of the flame-retardant separation belt, a glass fiber tape is arranged on the surface of the flame-retardant separation belt, solid lines are arranged on the surfaces of the glass fiber tape and the mica tape, a wire core is arranged between the two groups of solid lines, a flame-retardant filling interlayer is arranged between the mica tape and the waterproof layer, and a flame-retardant filling; the beneficial effects are that: the utility model provides a fire-retardant high voltage transmission cable separates the sinle silk with the help of fire-retardant separate zone, and connects four fire-retardant separate zones with the help of connecting strip cooperation butt joint strip, forms independent cavity in every fire-retardant separate zone, and the effectual intensity of a fire that prevents spreads.

Description

Flame-retardant high-voltage transmission cable

Technical Field

The utility model relates to a high voltage transmission cable correlation technique field specifically is a fire-retardant high voltage transmission cable.

Background

A cable is generally a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, and surrounded entirely by a highly insulating covering, and with the characteristics of internal current conduction and external insulation.

In the prior art, most of cables in the market at present have poor flame retardant property, cannot well prevent the spread of fire, have poor high temperature resistance and influence the service life of the cables; therefore, the utility model provides a fire-retardant high voltage transmission cable is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire-retardant high voltage transmission cable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fire-retardant high-voltage transmission cable, includes the protective layer, the inboard of protective layer is provided with the waterproof layer, the inboard of waterproof layer is provided with fire-retardant median, the surface of fire-retardant median is provided with the mica tape, and the surface of fire-retardant median is provided with the glass fiber tape, the surface of glass fiber tape and mica tape all is provided with solid lines, is provided with the sinle silk between two sets of solid lines, be provided with fire-retardant packing intermediate layer between mica tape and the waterproof layer, be provided with fire-retardant packing inner nuclear layer between glass fiber tape and the fire-retardant median, and the surface of fire-retardant median has seted up the butt joint groove, the inside butt joint in butt joint groove has the butt joint strip, the butt joint.

Preferably, the flame-retardant division belts are of fan-shaped cylindrical structures with L-shaped sections, the lengths of two bending edges of the flame-retardant division belts are equal, the number of the flame-retardant division belts is four, and the four flame-retardant division belts are spliced into a circular cylindrical structure.

Preferably, the mica tape and the glass fiber tape are both in an arc-shaped plate structure, the two groups of fixing lines are respectively distributed on the inner ring surface of the mica tape and the outer ring surface of the glass fiber tape, each group of fixing lines is provided with a plurality of fixing lines, and the plurality of fixing lines are equidistantly arranged on the inner ring surface of the mica tape.

Preferably, the butt joint grooves are of a rectangular cylinder structure, the number of the butt joint grooves is two, and the two connecting strips are respectively distributed on the two bending surfaces of the flame-retardant separating belt.

Preferably, the connecting strip is of a cross-shaped plate structure, four plate surfaces of the connecting strip are respectively inserted into the butt joint seals of the four flame-retardant separation strips, two butt joint strips are arranged on each plate surface of the connecting strip, and the two butt joint strips are symmetrically distributed about the plate surfaces of the connecting strip.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a fire-retardant high voltage transmission cable separates the sinle silk with the help of fire-retardant median, and connects four fire-retardant median with the help of connecting strip cooperation butt joint strip, forms independent cavity in every fire-retardant median, the effectual intensity of a fire that prevents spreads;

2. the utility model provides a fire-retardant high voltage transmission cable sets up waterproof layer and protective layer in the fire-retardant median outside, the concatenation stability of four fire-retardant median of promotion.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged schematic view of a structure in fig. 1.

In the figure: the fireproof insulation board comprises a protective layer 1, a waterproof layer 2, a flame-retardant separation belt 3, a mica tape 4, a glass fiber tape 5, a wire fixing strip 6, a wire core 7, a flame-retardant filling interlayer 8, a flame-retardant filling inner core layer 9, a butt joint groove 10, a butt joint strip 11 and a connecting strip 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 work belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution: the utility model provides a fire-retardant high-voltage transmission cable, including protective layer 1, the interior anchor ring of protective layer 1 bonds and has waterproof layer 2, the inboard parcel of waterproof layer 2 has fire-retardant median 3, fire-retardant median 3 is the fan-shaped cylinder structure of cross-section for "L" shape, the length on two limit of buckling of fire-retardant median 3 equals, fire-retardant median 3 is provided with four, four fire-retardant median 3 splice into circular cylinder structure, waterproof layer 2 and protective layer 1 parcel are in four fire-retardant median 3's the outside, promote four fire-retardant median 3 concatenation stability.

The mica tape 4 is bonded on the surface of the flame-retardant separation tape 3, the glass fiber tape 5 is bonded on the surface of the flame-retardant separation tape 3, the fixed lines 6 are bonded on the surfaces of the glass fiber tape 5 and the mica tape 4, the mica tape 4 and the glass fiber tape 5 are both in arc-shaped plate structures, the two sets of fixed lines 6 are distributed on the inner annular surface of the mica tape 4 and the outer annular surface of the glass fiber tape 5 respectively, the fixed lines 6 of each set are arranged in a plurality, the fixed lines 6 are arranged on the inner annular surface of the mica tape 4 at equal intervals and the same size, and the wire core 7 is clamped between the two sets of fixed lines 6.

And a flame-retardant filling interlayer 8 is filled between the mica tape 4 and the waterproof layer 2, a flame-retardant filling inner core layer 9 is filled between the glass fiber tape 5 and the flame-retardant separation tape 3, the flame-retardant filling interlayer 8 and the flame-retardant filling inner core layer 9 are made of polyolefin filling strips, and the flame-retardant effect is good.

Butt joint groove 10 has been seted up on fire-retardant median 3's surface, butt joint groove 10 is the rectangular cylinder structure, butt joint groove 10 is provided with two, two connecting strips 12 distribute respectively on two faces of buckling of fire-retardant median 3, butt joint groove 10's inside butt joint has butt joint strip 11, butt joint strip 11 bonds on connecting strip 12's surface, connecting strip 12 is "ten" font platelike structure, four faces of connecting strip 12 are pegged graft respectively in the butt joint of four fire-retardant median 3 seals, and all be provided with two butt joint strips 11 on every face of connecting strip 12, two butt joint strips 11 splice into cylindrical structure about the face symmetric distribution of connecting strip 12, connect fixedly back concatenation into through butt joint strip 11 and connecting strip 12 between four fire-retardant median 3.

The working principle is as follows: in actual work, protective layer 1 is in the outside of cable, and cooperate inside waterproof layer 2, play the guard action to the inside sinle silk 7 of cable, the fire-resistant insulating characteristic that mica tape 4 has, play fire-resistant insulating effect, and simultaneously, utilize the advantage that 5 insulating nature of glass fiber tape is good, the heat resistance is strong, the corrosion resistance is good and mechanical strength is high, further improve the insulating nature and the fire behaviour of cable, every group sinle silk 7 is installed in independent fire-retardant separate zone 3, and the inboard and the opening side of fire-retardant separate zone 3 add and establish fire-retardant packing intermediate layer 8 and fire-retardant packing inner nuclear layer 9, fire-retardant packing intermediate layer 8 and fire-retardant packing inner nuclear layer 9 adopt the polyolefin filler strip to make, and splice into the cylinder structure after connecting fixedly through butt joint strip 11 and connecting strip 12 between four fire-retardant separate zones 3.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A flame-retardant high-voltage transmission cable comprising a protective layer (1), characterized in that: a waterproof layer (2) is arranged on the inner side of the protective layer (1), a flame-retardant separation belt (3) is arranged on the inner side of the waterproof layer (2), a mica tape (4) is arranged on the surface of the flame-retardant separation belt (3), the surface of the flame-retardant separation belt (3) is provided with a glass fiber belt (5), the surfaces of the glass fiber belt (5) and the mica tape (4) are both provided with a solid line (6), a wire core (7) is arranged between the two groups of solid lines (6), a flame-retardant filling interlayer (8) is arranged between the mica tape (4) and the waterproof layer (2), a flame-retardant filling inner core layer (9) is arranged between the glass fiber tape (5) and the flame-retardant separation tape (3), and the surface of the flame-retardant dividing strip (3) is provided with a butt joint groove (10), a butt joint strip (11) is butt jointed in the butt joint groove (10), and the butt joint strip (11) is fixed on the surface of the connecting strip (12).

2. A fire retardant high voltage transmission cable according to claim 1, wherein: the flame-retardant dividing strips (3) are of fan-shaped cylinder structures with L-shaped sections, the lengths of two bending edges of the flame-retardant dividing strips (3) are equal, four flame-retardant dividing strips (3) are arranged, and the four flame-retardant dividing strips (3) are spliced into a circular cylinder structure.

3. A fire retardant high voltage transmission cable according to claim 1, wherein: the mica tape (4) and the glass fiber tape (5) are both in circular arc plate-shaped structures, two groups of fixing lines (6) are respectively distributed on the inner ring surface of the mica tape (4) and the outer ring surface of the glass fiber tape (5), each group of fixing lines (6) is provided with a plurality of fixing lines, and the plurality of fixing lines (6) are equidistantly arranged on the inner ring surface of the mica tape (4) in equal size.

4. A fire retardant high voltage transmission cable according to claim 1, wherein: the butt joint grooves (10) are of rectangular column structures, the number of the butt joint grooves (10) is two, and the two connecting strips (12) are respectively distributed on the two bending surfaces of the flame-retardant dividing belt (3).

5. A fire retardant high voltage transmission cable according to claim 1, wherein: the connecting strips (12) are of a cross-shaped plate structure, four plate surfaces of the connecting strips (12) are respectively inserted into the butt joint seals of the four flame-retardant separation belts (3), two butt joint strips (11) are arranged on each plate surface of the connecting strips (12), and the two butt joint strips (11) are symmetrically distributed about the plate surfaces of the connecting strips (12).