CN211208059U

CN211208059U - Power cable for tunnel lighting

Info

Publication number: CN211208059U
Application number: CN201922423421.6U
Authority: CN
Inventors: 吴军荣; 戴峥嵘; 徐呈祥; 夏康; 石海
Original assignee: Jiangsu Baoan Cable Co ltd
Current assignee: Jiangsu Bao'an Cable Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-07
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a power cable for tunnel lighting, which comprises a plurality of phase wire core units, a ground wire core unit and a control wire core unit which are externally tangent with each other, wherein the phase wire core unit comprises a conductor I, an insulating layer I is arranged outside the conductor I, the ground wire core unit comprises a conductor II, an insulating layer II is arranged outside the conductor II, the control wire core unit comprises a conductor III, an insulating layer III is arranged outside the conductor III and forms an insulating wire core, the two insulating wire cores are externally tangent, the outside of the phase wire core unit, the ground wire core unit and the control wire core unit are provided with elastic water-blocking filling, the elastic water-blocking filling device is characterized in that a wrapping layer is arranged outside the elastic water-blocking filling body, a flame-retardant layer is arranged outside the wrapping layer, and an outer sheath is arranged outside the flame-retardant layer. The utility model discloses not only waterproof but also fire-retardant, use reliably, operate steadily.

Description

Power cable for tunnel lighting

Technical Field

The utility model relates to a cable, concretely relates to cable for tunnel.

Background

The power supply form of tunnel illumination is a distributed power supply structure, a main cable and a plurality of branch cables are added, and power is radiated to the whole tunnel line from one end of the tunnel along the tunnel line. At present, two general modes are adopted, one mode is a T-shaped junction box, and the mode needs field construction. The method comprises the connection operation of fixing the T-shaped junction box and breaking the cable skin, and has the advantages of large occupied space, high labor intensity, poor sealing performance in the box, easy water or moisture inflow and poor power supply stability; the other type is a puncture wire clamp, the mode is that a puncture knife edge is directly pressed to break an insulating layer of a cable, and a metal knife edge is connected with a conductor, so that the conductor is damaged while the insulation is damaged, and the mechanical strength of the conductor and the power transmission section of the conductor are influenced. In addition, the puncture wire clamp is also constructed on site, has poor sealing performance, is easy to enter water or damp and has poor power supply stability.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims at overcoming the not enough among the prior art, provide a not only waterproof but also fire-retardant, use reliable, move steady power cable for tunnel lighting.

The technical scheme is as follows: in order to solve the technical problem, the utility model provides a power cable for tunnel lighting, it includes a plurality of phase core units, a ground core unit and a control core unit, they are circumscribed to set up each other, phase core unit includes conductor I, be equipped with insulating layer I outside conductor I, ground core unit includes conductor II, be equipped with insulating layer II outside conductor II, control core unit includes conductor III, be equipped with insulating layer III outside conductor III, they constitute insulating core, two insulating core circumscribed sets up, be equipped with the packing outside them, be equipped with the inner sheath outside the packing, be equipped with the elasticity outside of phase core unit, ground core unit and control core unit and block water the packing, be equipped with around the covering outside the elasticity blocks water the packing, be equipped with fire-retardant coating around the covering outside, and an outer sheath is arranged outside the flame-retardant layer.

And the number of the phase wire core units is four.

The elastic water-blocking filling adopts self-adhesive ethylene propylene rubber belts or silicon rubber belts.

Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is: the utility model discloses the structure sets up rationally, at phase line core unit, ground core unit and control sinle silk unit outside are equipped with elasticity and block water the packing, it has viscosity and easy deformation's characteristics, closely connect into an organic whole with them through this kind of packing, play waterproof effect, set up outer fire-retardant layer, fire-retardant characteristic can reach GB/T18380 and charge with the B class requirement of 2008 regulation, the cable burning luminousness is not less than 60%, the water-soluble thing PH value of gas that produces is greater than 4.3, the conductivity is less than 10 mus/mm, it is reliable wholly to use, the operation is steady, accord with the in-service use requirement.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

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

As shown in figure 1, the utility model provides a power cable for tunnel lighting, it includes four phase core unit 1, a ground core unit and a control core unit, they circumscribe the setting each other, phase core unit 1 includes conductor I2, be equipped with insulating layer I3 outside conductor I2, ground core unit includes conductor II 4, be equipped with insulating layer II 5 outside conductor II 4, control core unit includes conductor III 6, be equipped with insulating layer III 7 outside conductor III 6, they constitute the insulation core, two insulation core circumscribe the setting, be equipped with the packing outside them, be equipped with inner sheath 8 outside the packing, be equipped with elasticity and block water and fill 9 outside phase core unit 1, ground core unit and control core unit, it adopts self-adhesion type ethylene propylene rubber sticky tape or silicon rubber belt, the elastic water-blocking packing structure is characterized in that a wrapping layer 10 is arranged outside the elastic water-blocking packing 9, a flame-retardant layer 11 is arranged outside the wrapping layer 10, and an outer sheath 12 is arranged outside the flame-retardant layer 11. The utility model discloses the structure sets up rationally, at phase line core unit, ground core unit and control sinle silk unit outside are equipped with elasticity and block water the packing, it has viscosity and easy deformation's characteristics, closely connect into an organic whole with them through this kind of packing, play waterproof effect, set up outer fire-retardant layer, fire-retardant characteristic can reach GB/T18380 and charge with the B class requirement of 2008 regulation, the cable burning luminousness is not less than 60%, the water-soluble thing PH value of gas that produces is greater than 4.3, the conductivity is less than 10 mus/mm, it is reliable wholly to use, the operation is steady, accord with the in-service use requirement.

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. A power cable for tunnel lighting, characterized in that: it includes a plurality of phase line core units (1), a ground core unit and a control core unit, and they are circumscribed mutually and set up, phase line core unit (1) includes conductor I (2) the conductor I (2) outside is equipped with insulating layer I (3), ground core unit includes conductor II (4) the conductor II (4) outside is equipped with insulating layer II (5), control core unit includes conductor III (6) be equipped with insulating layer III (7) in the conductor III (6) outside, they constitute insulating core, and two insulating core are circumscribed sets up, are equipped with the packing in their outside be equipped with inner sheath (8) in the packing outside be equipped with elasticity around the package outside of phase line core unit (1), ground core unit and control core unit and be equipped with elasticity and block water and fill (9) elasticity blocks water and is equipped with outside of packing (9), the flame-retardant wrapping layer is characterized in that a flame-retardant layer (11) is arranged outside the wrapping layer (10), and an outer sheath (12) is arranged outside the flame-retardant layer (11).

2. The power cable for tunnel lighting according to claim 1, wherein: the phase core units (1) are four in number.

3. The power cable for tunnel lighting according to claim 1, wherein: the elastic water-blocking filling (9) adopts self-adhesive ethylene propylene rubber belts or silicon rubber belts.