CN210349414U

CN210349414U - Optical fiber composite monitoring type cable for coal mine

Info

Publication number: CN210349414U
Application number: CN201921086350.9U
Authority: CN
Inventors: 徐庭元; 贾彩云; 吴涛; 丁兆彦; 潘碧霞; 薛鑫; 张海吉; 吴志贵; 冯亮; 郭正虹
Original assignee: Jiangsu Zhongmei Cable Co Ltd
Current assignee: Jiangsu Zhongmei Cable Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-04-17
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses a coal mine optical fiber composite monitoring cable, which comprises an insulation wire core, a cable core and an outer sheath; the insulated wire core comprises a copper conductor, a semi-conductive inner shielding layer, an insulating layer and a semi-conductive outer shielding layer; three insulated wire cores are arranged in an equilateral triangle three-vertex mode, and the three insulated wire cores are twisted after a metal shielding layer is wrapped outside each insulated wire core; the cable core comprises three filling ropes, wherein an optical cable unit is arranged in one filling rope, and the three filling ropes are uniformly distributed at intervals between adjacent insulating wire cores and are twisted into the cable core; the cable core is extruded with the inner liner outward, the armor layer is wrapped around the inner liner outward, and an oversheath is crowded package outward to the armor layer. The utility model discloses with light, electric function based on an organic whole, avoided the problem that cable and optical cable laid respectively, it is heavy to have solved current multiple cable bulk weight simultaneously in order, bulky problem.

Description

Optical fiber composite monitoring type cable for coal mine

Technical Field

The utility model discloses the creation relates to power cable technical field for the colliery, especially relates to a compound monitoring type power cable of optic fibre for coal mine.

Background

The mining cable is a cable used in a mine power supply system, is mainly used in an underground environment, is a nerve junction of matched electrical equipment for coal mining, and plays an absolute role in safety above or under the mine. The working environment of the mining area is severe, and particularly, the underground environment has the hidden danger of flammability and explosiveness. The mine cable is in a load operation state for a long time, even has an overload operation state under special conditions, the underground space is narrow, the arrangement among the cables is dense, the integral heat dissipation of the cables is poor, and the cable is used in a long-term heating state, so that the thermal aging phenomenon of the cables is serious. At present, a state monitoring method for underground mining cables in operation falls behind, fine changes of states of the cables in operation cannot be monitored in real time, performances such as insulation resistance and core voltage resistance are generally measured in regular maintenance, reliability is poor, and labor cost is high.

The optical fiber has high sensitivity to temperature, and the optical fiber and the power cable are compounded, so that the real-time continuous monitoring of the temperature of the cable can be realized, and the cable not only has the power transmission function, but also has the signal transmission function. In the prior art, the method is adopted to twist the optical fiber with the signal transmission function and the power transmission wire core in the same cable core, so that the dual functions of power transmission and signal transmission of the cable are realized.

The existing tensile conductor has the following problems and disadvantages:

1. the signal core is intolerant to drag in the cable. In the prior art, the signal wire core is directly twisted in the cable core, the cross section of the signal wire core is small, no protective structure is provided, and the wire core is easy to break in the long-term moving and dragging process.

2. In the prior art, the cable load is too large, the temperature is increased, and the safe operation of the mining cable cannot be guaranteed without temperature monitoring.

SUMMERY OF THE UTILITY MODEL

To current conductor structure and the not enough that the reinforcement assembly exists, the utility model discloses the creation adopts new structure to be based on an organic whole with light, electric function, has avoided the problem that cable and optical cable laid respectively, and it is heavy to have solved current multiple cable bulk weight simultaneously in addition, bulky problem.

The optical fiber composite monitoring cable for the coal mine comprises an insulating wire core, a cable core and an outer sheath;

the insulated wire core comprises a copper conductor, a semi-conductive inner shielding layer, an insulating layer and a semi-conductive outer shielding layer; three insulated wire cores are arranged in an equilateral triangle three-vertex mode, and the three insulated wire cores are twisted after a metal shielding layer is wrapped outside each insulated wire core; the cable core comprises three filling ropes, wherein an optical cable unit is arranged in one filling rope, and the three filling ropes are uniformly distributed at intervals between adjacent insulating wire cores and are twisted into the cable core; the cable core is extruded with the inner liner outward, the armor layer is wrapped around the inner liner outward, and an oversheath is crowded package outward to the armor layer.

The scheme is further improved, and the filling rope is a flame-retardant buffering filling rope.

The scheme is further improved, and the armor layer is a metal armor layer made of steel belts or modified steel wires.

The beneficial effects of the utility model reside in that:

the utility model discloses an electric power and signal sinle silk compound, reduced the external diameter of cable, reduced the weight of cable, reduced and laid the number of times, reduced production and laid the cost. The cable has the advantages of transmitting electric energy, monitoring the temperature distribution information of the cable body on line and transmitting signals.

Drawings

Fig. l is an overall schematic view of the present invention.

Detailed Description

The invention is further described with reference to the following specific drawings and examples.

As shown in fig. 1: the embodiment of the optical fiber composite monitoring cable for the coal mine is specifically an optical fiber composite monitoring cable for the coal mine with rated voltage of 8.7kv or below 10kv, and is characterized by comprising an insulating wire core, a cable core and an outer sheath 10;

the insulated wire core comprises a copper conductor 1, a semi-conductive inner shielding layer 2, an insulating layer 3 and a semi-conductive outer shielding layer 4; three insulated wire cores are arranged in an equilateral triangle three-vertex mode, and the three insulated wire cores are twisted after a metal shielding layer 5 is wrapped outside each insulated wire core;

the cable core comprises three filling ropes 6, wherein an optical cable unit 9 is arranged in one filling rope, and the three filling ropes are uniformly distributed at intervals between adjacent insulating wire cores and are twisted into the cable core;

the cable core is extruded with the inner liner outward, the armor layer is wrapped around the inner liner outward, and an oversheath is crowded package outward to the armor layer.

1) And the electric energy is transmitted by utilizing a wire core consisting of a conductor, an insulator and a metal shield. The Optical fiber is built in the gap between the insulated cores and obtains the temperature distribution information and signal transmission of the cable body by using the Optical fiber Raman scattering effect (Raman scattering) and the Optical Time-Domain Reflectometry (OTDR).

2) The signal wire cores are arranged in the positions of the gaps between the insulating wire cores, so that the cable space is not occupied, the number of the cable wire cores in the cable core is reduced, and the outer diameter of the cable is reduced.

1. Principle of operation

2. Working process

The conductor-1 is externally extruded with a semi-conductive inner shielding layer-2, an insulating layer-3 and a semi-conductive outer shielding layer-4 to form an insulating wire core, the insulating wire core is externally extruded with a metal shielding layer to form-5, then 3 insulating wire cores are twisted, meanwhile, an optical cable unit-9 is placed in a flame-retardant buffer filling rope-6 to be twisted into a cable core, then the cable core is externally extruded with an inner liner layer or an isolation sleeve-7, then the inner liner layer or the isolation sleeve is externally extruded with a steel belt or a braided steel wire metal armor layer-8, and the inner liner layer or the isolation sleeve is externally extruded with an outer sheath-10.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The optical fiber composite monitoring type cable for the coal mine is characterized by comprising an insulating wire core, a cable core and an outer sheath (10);

the insulated wire core comprises a copper conductor (1), a semi-conductive inner shielding layer (2), an insulating layer (3) and a semi-conductive outer shielding layer (4); three insulated wire cores are arranged in an equilateral triangle three-vertex mode, and the three insulated wire cores are twisted after a metal shielding layer (5) is wrapped outside each insulated wire core;

the cable core comprises three filling ropes (6), wherein an optical cable unit (9) is arranged in one filling rope, and the three filling ropes are uniformly distributed at intervals between adjacent insulating wire cores and are twisted into the cable core;

the cable core is externally extruded with an inner liner (7), the inner liner (7) is externally wound with an armor layer (8), and the armor layer (8) is externally extruded with an outer sheath (10);

the filling rope (6) is a flame-retardant buffer filling rope;

the armor layer (8) is a metal armor layer made of steel belts or modified steel wires.