CN210743658U - Low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mine - Google Patents

Abstract

The utility model discloses a low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mines, which comprises a filling layer, an insulating wire core, a signal wire core and a cable sheath; the insulated wire core comprises a conductor, an inner shielding layer, an insulating layer and an outer shielding layer; the cable sheath sequentially comprises a first glass fiber belt layer, a braid, a fire-resistant layer, a first fire-resistant layer, a second fire-resistant layer, a steel belt armor layer, a second glass fiber belt layer and an outer sheath from inside to outside; this cable is based on an organic whole with light, electric function, has avoided the problem that cable and optical cable laid respectively, solves that cable bulk weight is heavy, bulky and cable produce in naked light a large amount of cigarette and toxic gas, do not have the fire resistance problem.

Description

Low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mine

Technical Field

The utility model discloses the creation relates to cable technical field, especially relates to a fire-retardant fire prevention photoelectricity composite cable of low smoke and zero halogen for coal mine.

Background

The existing cable is single in function, large in occupied space and high in laying difficulty, so that the cable is required to have a signal transmission function besides the main function of power transmission, manufacturing, transportation, installation and construction and labor cost can be saved, and the utilization rate of space and lines is improved. In the prior art, a method is adopted, in which a wire core with a signal transmission function and a wire core for power transmission are stranded in the same cable core, so that the dual functions of the cable are realized.

Along with the development of economy and science and technology, people require that the space utilization rate of a coal mine is improved, and meanwhile, the security and environmental awareness of cables are enhanced. At present, PVC is mostly used as a cable material, so that the cable material is not beneficial to environmental protection and cannot play a role in flame retardance and fire resistance.

1. At present, the mine cable only has a power transmission function and no control signal transmission function, the use function is single, the signal cable is usually laid separately, the cost is high, and the installation is inconvenient.

2. At present, most of mining cable materials use PVC, which is not only unfavorable for environmental protection, but also has no flame retardant and fire resistant effects. The PVC sheath material can generate a large amount of smoke when a fire disaster occurs, and is unfavorable for rescuing or extinguishing in a mine pit.

3. Without fire resistance, the cable is immediately deactivated in a light fire, which reduces the reliability of the cable in the fire.

Disclosure of Invention

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 solve the whole weight of cable, and is bulky and a large amount of cigarettes and toxic gas, the problem of no fire resistance that the cable produced in the naked light.

The low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for the coal mine comprises filling, an insulating wire core, a signal wire core and a cable sheath;

the insulating wire cores comprise three groups and are uniformly distributed at intervals along the circumference, the signal wire cores are arranged in gaps between adjacent insulating wire cores, the cable sheath wraps the peripheries of the wound insulating wire cores and the signal wire cores, and the space formed by the cable sheath, the insulating wire cores and the signal wire cores is filled with the cable sheath;

the insulated wire core comprises a conductor, an inner shielding layer, an insulating layer and an outer shielding layer;

wherein the conductor is sequentially wrapped with an inner shielding layer, an insulating layer and an outer shielding layer; the inner shielding layer, the insulating layer and the outer shielding layer adopt a three-layer co-extrusion structure, a semi-conductive cloth belt is flatly wrapped outside the outer shielding layer, and a soft copper belt is wrapped outside the semi-conductive cloth belt in an overlapping manner;

the signal wire core comprises optical fiber bundles, fiber paste, hollow micro-tubes and loose tubes, the optical fiber bundles comprise four groups and are uniformly distributed at intervals along the circumference, the hollow micro-tubes and the loose tubes are sequentially wrapped outside the optical fiber bundles, and the space formed between the optical fiber bundles and the hollow micro-tubes is filled with the fiber paste;

the cable sheath comprises a first glass fiber tape layer, a braid, a flame retardant coating, a first flame retardant coating, a second flame retardant coating, a steel tape armor layer, a second glass fiber tape layer and an outer sheath from inside to outside in sequence;

further, the refractory layer comprises two layers: a first refractory layer and a second refractory layer; each fireproof layer consists of an extruded ceramic flower polyolefin layer and a wrapping layer;

further, the conductor is made of oxygen-free copper material. The inner shielding layer is made of 10kV inner shielding materials, and the insulating layer is insulated by 10kV cross-linked polyethylene; the external shielding layer adopts a strippable 10kV external shielding material;

further, the first layer of the glass fiber tape layer and the second layer of the glass fiber tape are made of the same material, and each layer of the glass fiber tape is an alkali-free glass fiber tape with the thickness of 0.2mm and the width of 70 mm; weaving aramid yarns, and doubling the yarns by using a numerical control tension device, wherein the weaving angle is controlled to be 45-50 degrees; the outer sheath is made of low-smoke halogen-free polyolefin sheath material.

The beneficial effects of the utility model reside in that:

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

Drawings

Fig. 1 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:

a low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mines comprises a filling 7, an insulating wire core, a signal wire core and a cable sheath;

the insulated wire cores comprise three groups and are uniformly distributed at intervals along the circumference, the signal wire cores are arranged in the gaps between the adjacent insulated wire cores, the internal space of the cable can be effectively utilized, and the gaps are filled with the expanded glass fiber ropes to be round and compact;

the cable sheath is wrapped on the periphery of the wound insulating wire core and the wound signal wire core, and a filling 7 is filled in a space formed by the cable sheath and the insulating wire core and the signal wire core;

the insulated wire core comprises a conductor 1, an inner shielding layer 2, an insulating layer 3 and an outer shielding layer 4;

wherein, the conductor 1 is wrapped with an inner shielding layer 2, an insulating layer 3 and an outer shielding layer 4 in sequence; the inner shielding layer 2, the insulating layer 3 and the outer shielding layer 4 adopt a three-layer co-extrusion structure, a semi-conductive cloth belt 5 is flatly wrapped outside the outer shielding layer 4, and a soft copper strip 6 is wrapped outside the semi-conductive cloth belt 5 in an overlapping manner; the overlapping rate of the soft copper strip is not less than 15 percent,

the signal wire core comprises optical fiber bundles 17, fiber paste 18, hollow micro-tubes 19 and loose tubes 20, the optical fiber bundles 17 comprise four groups and are uniformly distributed at intervals along the circumference, the hollow micro-tubes 19 and the loose tubes 20 are sequentially wrapped outside the optical fiber bundles, and the space formed between the optical fiber bundles and the hollow micro-tubes 19 is filled with the fiber paste 18;

the cable sheath comprises a first glass fiber tape layer 8, a braid 9, a flame retardant coating, a first flame retardant coating, a second flame retardant coating, a steel tape armor layer 14, a second glass fiber tape layer 15 and an outer sheath 16 from inside to outside in sequence;

further, the refractory layer comprises two layers: a first refractory layer and a second refractory layer; each fireproof layer consists of an extruded ceramic flower polyolefin layer and a wrapping layer; wherein, a first extruded ceramic flower polyolefin layer 10 and a first wrapped layer 11 of the first fire-resistant layer are arranged;

the second fire-resistant layer comprises a second extruded ceramic flower polyolefin layer 12 and a second wrapping layer 13;

the conductor 1 is made of oxygen-free copper material. 2-class compacted copper conductor structure is adopted, so that the outer diameter of the conductor is reduced, and the conductivity of the conductor is improved;

the inner shielding layer 2 is made of 10kV inner shielding material, and the insulating layer 3 is insulated by 10kV cross-linked polyethylene;

the external shielding layer 4 is made of a strippable 10kV external shielding material; in order to reduce partial discharge, the semi-conductive cloth belt is wrapped outside the insulation layer, the wrapping tape is flat, and no missing bag exists. The wrapping is in good contact with the shielded insulating layer and has the same potential as the metal sheath, so that partial discharge between the insulating layer and the sheath is avoided;

further, the first layer of glass fiber tape layer 8 and the second layer of glass fiber tape are made of the same material, and each layer of glass fiber tape is an alkali-free glass fiber tape with the thickness of 0.2mm and the width of 70 mm; the overlapping rate is not less than 15%, the lapping direction is leftward, the lapping is smooth, no lapping is missed, and the actual pitch control of the finished cable is not more than 40 times of the outer diameter of the finished cable.

Weaving 9 aramid yarns, and doubling the yarns by using a numerical control tension device, wherein the weaving angle is controlled to be 45-50 degrees; the weaving pitch is ensured to be uniform, the surface is smooth, and the tensile resistance is enhanced.

The outer sheath 16 is made of low smoke halogen-free polyolefin sheath material.

1. Principle of operation

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 arranged in the cable core to obtain signal transmission, so that the dual functions of the cable are realized.

2) The signal wire cores are arranged in the gaps of 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, the outer diameter of the cable is reduced, and the laying cost is reduced.

3) The utility model discloses a cable protection device, cable sheath structure adopts the structure of "two flame retardant coatings + steel band armor + second floor glass fiber tape + outer protection", and the cable only has little cable material to burn in the naked light in the burning, and consequently the cigarette that produces can still less, has set up the fine band layer of first glass simultaneously outside the cable core, and this kind of structure can more effectual isolation naked light, and furthest reduces the conflagration to the inside injury of cable to reliability in the improvement cable conflagration.

4) The sheath material is made of low-smoke halogen-free polyolefin material, does not contain halogen and has flame retardant property, so that low-smoke, halogen-free and low-toxicity performance during combustion is realized.

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 (4)

1. A low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for a coal mine is characterized by comprising a filling (7), an insulating wire core, a signal wire core and a cable sheath;

the insulating wire cores comprise three groups and are uniformly distributed at intervals along the circumference, the signal wire cores are arranged in gaps between adjacent insulating wire cores, the cable sheath wraps the wound insulating wire cores and the signal wire cores, and the filling (7) fills the space formed by the cable sheath and the insulating wire cores and the signal wire cores;

the insulated wire core comprises a conductor (1), an inner shielding layer (2), an insulating layer (3) and an outer shielding layer (4);

wherein the conductor (1) is sequentially wrapped with an inner shielding layer (2), an insulating layer (3) and an outer shielding layer (4); the inner shielding layer (2), the insulating layer (3) and the outer shielding layer (4) adopt a three-layer co-extrusion structure, a semi-conductive cloth belt (5) is flatly wrapped outside the outer shielding layer (4), and a soft copper strip (6) is wrapped outside the semi-conductive cloth belt (5) in an overlapping manner;

the signal wire core comprises optical fiber bundles (17), fiber paste (18), hollow micro-tubes (19) and loose tubes (20), the optical fiber bundles (17) comprise four groups and are uniformly distributed at intervals along the circumference, the hollow micro-tubes (19) and the loose tubes (20) are sequentially wrapped outside the optical fiber bundles, and the space formed between the optical fiber bundles and the hollow micro-tubes (19) is filled with the fiber paste (18);

the cable sheath comprises a first glass fiber tape layer (8), a braid (9), a fire-resistant layer, a first fire-resistant layer, a second fire-resistant layer, a steel tape armor layer (14), a second glass fiber tape layer (15) and an outer sheath (16) from inside to outside in sequence.

2. The low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mines as claimed in claim 1,

the refractory layer comprises two layers: a first refractory layer and a second refractory layer; each fire-resistant layer consists of an extruded ceramic flower polyolefin layer and a wrapping layer.

3. The low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mines as claimed in claim 1,

the conductor (1) is made of oxygen-free copper material,

the inner shielding layer (2) is made of 10kV inner shielding material, and the insulating layer (3) is insulated by 10kV cross-linked polyethylene;

the external shielding layer (4) adopts a strippable 10kV external shielding material.

4. The low-smoke halogen-free flame-retardant fireproof photoelectric composite cable for coal mines as claimed in claim 1,

the first layer of glass fiber tape layer (8) and the second layer of glass fiber tape are made of the same material, and each layer of glass fiber tape is an alkali-free glass fiber tape with the thickness of 0.2mm and the width of 70 mm;

weaving (9) aramid yarns, and doubling the yarns by using a numerical control tension device, wherein the weaving angle is controlled to be 45-50 degrees;

the outer sheath (16) is made of low-smoke halogen-free polyolefin sheath material.

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