CN210223619U

CN210223619U - Anti-freezing direct-buried cable

Info

Publication number: CN210223619U
Application number: CN201921382594.1U
Authority: CN
Inventors: Tiangang Jiang; 蒋天刚; Ziyong Wu; 吴自勇; Yang Yang; 杨洋; Jinbao Li; 李金保; Hai Shi; 石海
Original assignee: Jiangsu Baoan Cable Co Ltd
Current assignee: Jiangsu Bao'an Cable Co ltd
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2020-03-31
Anticipated expiration: 2029-08-24

Abstract

The utility model relates to an anti-freezing direct-burried cable, it includes power core conductor the outside insulating layer I that is equipped with of power core conductor, their component insulation sinle silk, many insulation sinle silk stranding are equipped with the filling layer in their outside the filling layer outside is equipped with low temperature resistant band the low temperature resistant band outside is equipped with the inner sheath outside evenly is equipped with a plurality of ground wire insulation sinle silks. The utility model discloses set up the heating conductor of winding cladding insulating layer outside cable sheathing, evenly to the cable sheathing heating, guarantee the normal operating of sheath in low temperature environment to improve cable life.

Description

Anti-freezing direct-buried cable

Technical Field

The utility model relates to a cable, concretely relates to anti-freezing (buried directly) cable.

Background

In a cold environment, when a cable is directly buried and laid, the cable is generally required to be laid under a frozen soil layer, if the frozen soil layer is thick, the engineering quantity during laying is obviously greatly increased, meanwhile, when snow or ice layers melt, water is immersed into the ground and can spread to the periphery of the cable, the temperature of the cable is further reduced, particularly the temperature of the surface of the cable sheath is reduced, and therefore the cable sheath needs to be well protected. At present, the cable sheath is mainly made of high polymer materials, and aging phenomena such as embrittlement and the like can occur at low temperature.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims at overcoming not enough among the prior art, provide a set up the heating conductor of winding cladding insulating layer outside cable sheathing, evenly to the cable sheathing heating, guarantee the normal operating of sheath in low temperature environment to improve cable life's anti-freezing direct-burried cable.

The technical scheme is as follows: in order to solve the technical problem, the anti-freezing direct-buried cable of the utility model comprises a power core conductor, an insulating layer I is arranged outside the power wire core conductor and forms an insulating wire core, a plurality of insulating wire cores are cabled, and a filling layer is arranged outside the insulating wire cores, a low-temperature resistant wrapping tape is arranged outside the filling layer, an inner sheath is arranged outside the low-temperature resistant wrapping tape, a plurality of ground wire insulated wire cores are uniformly arranged outside the inner sheath, the ground wire insulated wire cores comprise ground wire core conductors, an insulating layer II is arranged outside the ground wire core conductor, an insulating cushion layer is arranged outside the ground wire insulating wire core, an armor layer is arranged outside the insulating cushion layer, an outer sheath is arranged outside the armor layer, a heating wire core is wound outside the outer sheath, the heating wire core comprises a heating conductor, and a high-temperature-resistant insulating layer is arranged outside the heating conductor.

The power wire core conductor is a copper or aluminum solid core or a compacted stranded conductor, and the compaction coefficient is greater than 0.96; the ground wire core conductor is a copper or aluminum solid conductor, and the total sectional area of the ground wire core conductor is larger than one half of the sectional area of the power wire core conductor; the heating conductor is a copper-nickel conductor with large resistance coefficient, and the sectional area of the heating conductor ranges from 1.0mm to 25mm²。

The insulating layer I is a linear low-density polyethylene layer, and the thickness of the insulating layer is not less than 1.0 mm.

The filling layer is a low-temperature-resistant polypropylene rope.

The low-temperature-resistant wrapping tape and the insulating cushion layer are both polyethylene tapes.

The inner sheath is a low-temperature-resistant linear density polyethylene sheath, and the thickness of the inner sheath is not less than 1.6 mm.

The thickness of the insulating layer II is not less than 0.70mm, and the proportion of the ground wire insulating wire core covering the surface area of the inner sheath is more than 50%.

The armor layer is a double-layer steel belt.

The outer sheath is a cold-resistant polyethylene sheath, and the thickness of the outer sheath is larger than 2.0 mm.

The high-temperature-resistant insulating layer is made of silicon rubber, and the thickness of the insulating layer is 0.7-1.0 mm.

Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is: the utility model has the advantages of reasonable overall structure, power core conductor is copper or aluminium solid core or sticiss the transposition conductor, it is greater than 0.96 to sticis the coefficient, effectively reduce the inside clearance of conductor, prevent the entering of moisture, insulating layer I adopts linear low density polyethylene, have fine radial waterproof nature, in low temperature freezing environment, prevent the entering of ice melting back water, filling material is low temperature resistant polypropylene rope, fill up insulating core clearance, guarantee the cable is round, low temperature resistant band is the polyethylene area, tighten the stranding sinle silk and have insulating and waterproof function, insulating layer II adopts not only high temperature resistant but also low temperature resistant silicon rubber material, make the cable normal operating in low temperature environment, the in-process that generates heat at ground core conductor simultaneously, in its inside and outside structure is given with the heat transfer, increase the temperature when the cable operates, many times, power core conductor is the solid core or sticiss the transposition conductor, it is greaterThe ground wire insulation wire core is stranded on the inner sheath, the proportion of the insulation wire core covering the surface area of the inner sheath is more than 50%, the insulation angle can be adjusted, the insulation cushion layer adopts a polyethylene belt to fasten and protect the ground wire insulation wire core, the heating conductor adopts a copper-nickel conductor with large resistance coefficient, large heat can be generated during small current, the cross section of the conductor is selected according to the outer diameter of the cable, the larger the outer diameter of the cable is, the larger the cross section area is, and the range of the cross section area is 1.0-25 mm²The high-temperature-resistant insulating layer is made of silicon rubber, so that heat generated when the heating conductor passes through current can be transferred to the cable sheath and the external environment of the cable, and the outer sheath is prevented from being frozen.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention;

fig. 2 is a schematic diagram of the arrangement of the heating wire core of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, an anti-freezing direct-burried cable, power core conductor 1 is crowded package insulating layer I2 outward, three insulation core stranding fill up the filler material in the clearance, the stranding is outer around package low temperature resistant band 4, crowded package inner sheath 5, many ground core conductor 6 is crowded package insulating layer II 7 outward becomes ground wire insulation core transposition outside inner sheath 5, cladding insulation cushion 8, around package armor 9, crowded package oversheath 10, winding outside oversheath 10 after the 12 outer crowded package high temperature resistant insulating layer 13 of heating conductor. The utility model has the advantages of reasonable overall structure, power core conductor is copper or aluminium solid core or sticiss the transposition conductor, the coefficient of sticising is greater than 0.96, effectively reduce the inside clearance of conductor, prevent the entering of moisture, insulating layer I adopts linear low density polyethylene, have fine radial waterproof nature, in low temperature freezing environment, prevent the entering of ice melting back water, filling material is low temperature resistant polypropylene rope, fill up insulating core clearance, guarantee the cable is round, low temperature resistant band is the polyethylene area, tighten the stranding sinle silk and have insulating and waterproof function, insulating layer II adopts not only high temperature resistant but also low temperature resistant silicon rubber material, make the cableThe cable is normally operated in a low-temperature environment, meanwhile, in the process of heating of the ground wire core conductor, heat is transferred to the structure inside and outside the cable, the temperature of the cable in operation is increased, a plurality of ground wire insulation wire cores are stranded on the inner sheath, the proportion of the surface area of the inner sheath covered by the insulation wire cores is larger than 50%, the insulation wire cores can be adjusted through the stranded angle, the insulation cushion layer adopts a polyethylene belt, the ground wire insulation wire cores are fastened and protected, the heating conductor adopts a copper-nickel conductor with a large resistance coefficient, and can generate large heat in a small current, the section of the conductor is selected according to the outer diameter of the cable, the outer diameter of the cable is larger, the section area²The high-temperature-resistant insulating layer is made of silicon rubber, so that heat generated when the heating conductor passes through current can be transferred to the cable sheath and the external environment of the cable, and the outer sheath is prevented from being frozen.

The utility model provides a thinking and method, the method and the way of specifically realizing this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements should also be regarded as the utility model discloses a protection range, each component that does not make clear and definite in this embodiment all can be realized with prior art.

Claims

1. An anti-freezing direct-buried cable is characterized in that: the cable comprises a power core conductor (1), an insulating layer I (2) is arranged outside the power core conductor (1) and forms an insulating core, a plurality of insulating cores are cabled, a filling layer (3) is arranged outside the insulating core, a low-temperature-resistant wrapping tape (4) is arranged outside the filling layer (3), an inner sheath (5) is arranged outside the low-temperature-resistant wrapping tape (4), a plurality of ground wire insulating cores are uniformly arranged outside the inner sheath (5), the ground wire insulating cores comprise ground wire core conductors (6), an insulating layer II (7) is arranged outside the ground wire core conductors (6), an insulating cushion layer (8) is arranged outside the ground wire insulating cores, an armor layer (9) is arranged outside the insulating cushion layer (8), an outer sheath (10) is arranged outside the armor layer (9), and a heating wire core (11) is wound outside the outer sheath (10), the heating wire core (11) comprises a heating conductor (12), and a high-temperature-resistant insulating layer (13) is arranged outside the heating conductor (12).

2. The anti-icing buried cable according to claim 1, wherein: the power wire core conductor (1) is a copper or aluminum solid core or a compacted stranded conductor, and the compaction coefficient is greater than 0.96; the ground wire core conductor (6) is a copper or aluminum solid conductor, and the total sectional area of the ground wire core conductor (6) is larger than half of the sectional area of the power wire core conductor (1); the heating conductor (12) is a copper-nickel conductor with large resistance coefficient, and the sectional area range of the heating conductor is 1.0mm-25mm²。

3. The anti-icing buried cable according to claim 1, wherein: the insulating layer I (2) is a linear low-density polyethylene layer, and the thickness of the insulating layer is not less than 1.0 mm.

4. The anti-icing buried cable according to claim 1, wherein: the filling layer (3) is a low-temperature-resistant polypropylene rope.

5. The anti-icing buried cable according to claim 1, wherein: the low-temperature-resistant wrapping tape (4) and the insulating cushion layer (8) are both polyethylene tapes.

6. The anti-icing buried cable according to claim 1, wherein: the inner sheath (5) is a low-temperature-resistant linear density polyethylene sheath, and the thickness of the inner sheath is not less than 1.6 mm.

7. The anti-icing buried cable according to claim 1, wherein: the thickness of the insulating layer II (7) is not less than 0.70mm, and the proportion of the ground wire insulating wire core covering the surface area of the inner sheath (5) is more than 50%.

8. The anti-icing buried cable according to claim 1, wherein: the armor layer (9) is a double-layer steel belt.

9. The anti-icing buried cable according to claim 1, wherein: the outer sheath (10) is a cold-resistant polyethylene sheath, and the thickness of the outer sheath is larger than 2.0 mm.

10. The anti-icing buried cable according to claim 1, wherein: the high-temperature-resistant insulating layer (13) is made of silicon rubber, and the thickness of the insulating layer is 0.7-1.0 mm.