CN215815352U - Halogen-free low-smoke power cable for coal mine - Google Patents
Halogen-free low-smoke power cable for coal mine Download PDFInfo
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- CN215815352U CN215815352U CN202121622578.2U CN202121622578U CN215815352U CN 215815352 U CN215815352 U CN 215815352U CN 202121622578 U CN202121622578 U CN 202121622578U CN 215815352 U CN215815352 U CN 215815352U
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Abstract
The utility model provides a halogen-free low-smoke power cable for a coal mine, which comprises an outer sheath, wherein steel wire armoring is woven on the inner wall surface of the outer sheath along the length direction of the outer sheath, and steel strip armoring is woven on the inner wall surface of the steel wire armoring along the length direction of the steel wire armoring, and relates to the technical field of power cables. The halogen-free low-smoke power cable for the coal mine, provided by the utility model, has the advantages that the outer sheath is made of polyethylene in polyolefin, so that the outer sheath is insulated in the using process, when the outer sheath encounters a fire, harmful gas is not discharged when the outer sheath is heated and melted, less smoke is generated when the outer sheath is heated and melted, and through the protection of the steel wire armor and the steel strip armor, after the outer sheath is burnt and melted, the conductor is protected, so that the flame retardant effect of the cable in the using process is better, and the operation stability of the cable in a special environment of the coal mine is improved.
Description
Technical Field
The utility model relates to the field of power cables, in particular to a halogen-free low-smoke power cable for a coal mine.
Background
The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under river-crossing seawater, is gradually increased in proportion in the power line, is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises various insulated power cables with voltage grades of 1-500KV and above.
The existing power cable for coal mines is mostly a sheath made of halogen-containing materials, and as a traditional flame-retardant mode, the halogen-containing materials are added in a material system to be the most effective, but in the thermal decomposition process of contact with flame and combustion, a large amount of smoke and toxic corrosive hydrogen halide gas can be generated.
Therefore, it is necessary to provide a halogen-free low-smoke power cable for coal mines to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a halogen-free low-smoke power cable for a coal mine, which solves the problems that most of the conventional power cables for the coal mine are sheaths made of halogen-containing materials, and a large amount of smoke and toxic corrosive hydrogen halide gas are generated in the thermal decomposition process of contact and combustion with flame.
In order to solve the technical problem, the utility model provides a halogen-free low-smoke power cable for coal mines, which comprises an outer sheath, wherein a steel wire armor is woven on the inner wall surface of the outer sheath along the length direction of the outer sheath, a steel strip armor is woven on the inner wall surface of the steel wire armor along the length direction of the steel wire armor, an inner liner is glued on the inner wall surface of the steel strip armor along the length direction of the steel strip armor, a wrapping tape is wound on the inner wall surface of the inner liner along the length direction of the inner liner, a plurality of conductors are arranged in the inner cavity of the wrapping tape along the length direction of the wrapping tape at intervals in an annular manner, a conductor shielding layer is fixedly glued on the outer surface of each conductor, an insulating layer is glued on the outer surface of each conductor shielding layer, an insulating shielding layer is glued on the outer surface of each insulating layer, and a metal shielding layer is glued on the outer surface of each insulating shielding layer, the outer sheath is a polyolefin material.
Preferably, the steel wire armor is formed by annularly and tightly winding a plurality of steel wires along the surface of the lining layer.
Preferably, the outer sheath is a protective sheath formed of polyethylene in a polyolefin material.
Preferably, cabling filling is filled between the outer surface of the metal shielding layer and the inner wall surface of the wrapping tape.
Preferably, the surface of the outer sheath is glued with a plurality of connecting strips along the length direction of the outer sheath, an outer sleeve layer is welded to the outer portion of the outer sheath, and the inner cavity of the outer sleeve layer is located outside the outer sheath and provided with the marking liquid.
Preferably, the outer surface of the outer sheath is coated with an anticorrosive hydrophobic layer, and the surface of the outer sheath is coated with a fireproof layer.
Compared with the related technology, the halogen-free low-smoke power cable for the coal mine has the following beneficial effects:
the utility model provides a halogen-free low-smoke power cable for coal mines, which is characterized in that an outer sheath is made of polyethylene in polyolefin, the outer sheath is insulated in the using process, when the outer sheath encounters fire, harmful gas is not discharged when the outer sheath is melted by heat, less smoke is generated when the outer sheath is melted by heat, and the inner conductor is protected by steel wire armor and steel tape armor after the outer sheath is burnt out, so that the cable has better flame retardant effect in the using process, the stability of the cable in the special environment of the coal mine is improved, the situations of a large amount of smoke and toxic corrosive gas generated in the contact decomposition process of the cable and flame are avoided, the later rescue work is facilitated, the guarantee of the life safety of underground workers in the coal mine is improved, the loss of the cable encountering fire is reduced, and when a part at one position of the cable is melted in a small fire, the discharge marking liquid is burnt out to the accessible overcoat layer, carries out fire-retardant through liquid to through the surface of liquid infiltration out cable, the artifical department of burning out who in time finds the cable of being convenient for carries out remedial measure.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of a halogen-free low-smoke power cable for coal mines, provided by the utility model;
fig. 2 is a schematic structural view of the conductor and the steel tape armor shown in fig. 1.
Reference numbers in the figures: 1. a conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a metal shielding layer; 6. cabling and filling; 7. wrapping belts; 8. an inner liner layer; 9. steel tape armoring; 10. steel wire armoring; 11. an outer sheath; 12. an overcoat layer; 13. and (4) connecting strips.
Detailed Description
The utility model is further described with reference to the following figures and embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a halogen-free low-smoke power cable for coal mines according to a preferred embodiment of the present invention; fig. 2 is a schematic structural view of the conductor and the steel tape armor shown in fig. 1. The halogen-free low-smoke power cable for the coal mine comprises an outer sheath 11, wherein a steel wire armor 10 is woven on the inner wall surface of the outer sheath 11 along the length direction of the outer sheath 11, the outer sheath 11 is made of polyolefin materials, and the outer sheath 11 is a protective sleeve formed by polyethylene in the polyolefin materials.
The outer sheath 11 is made of polyethylene in polyolefin, so that the outer sheath 11 is insulated in the using process, when the outer sheath 11 encounters fire, harmful gas is not emitted when the outer sheath 11 is heated and melted, and smoke generated when the outer sheath 11 is heated and melted is less.
The steel tape armor 9 is woven on the inner wall surface of the steel wire armor 10 along the length direction of the steel wire armor 10, the inner wall surface of the steel tape armor 9 is glued with the lining layer 8 along the length direction of the steel tape armor 9, and the wrapping tape 7 is wound on the inner wall surface of the lining layer 8 along the length direction of the lining layer 8.
Through the protection of the steel wire armor 10 and the steel strip armor 9, after the outer sheath 11 is burnt and melted, the inner conductor 1 is protected, so that the cable has no halogen in the use process and good flame retardant effect.
The cable is improved in operation stability in the special environment of the coal mine, the situations of a large amount of smoke and toxic corrosive gas generated in the contact decomposition process of the cable and flame are avoided, the later-stage rescue work is facilitated, the guarantee of the life safety of underground workers is improved, some precise instruments in the coal mine are protected, and the loss caused by fire in the coal mine is reduced.
The inner cavity of the wrapping tape 7 is provided with a plurality of conductors 1 along the length direction of the wrapping tape 7, and the plurality of conductors 1 are uniformly distributed and arranged along the inner cavity of the wrapping tape 7 at intervals in a ring shape.
The outer surface of the conductor 1 is fixedly glued with a conductor shielding layer 2, the outer surface of the conductor shielding layer 2 is glued with an insulating layer 3, the outer surface of the insulating layer 3 is glued with an insulating shielding layer 4, and the outer surface of the insulating shielding layer 4 is glued with a metal shielding layer 5.
The metal shielding layer 5 mainly shields the electromagnetic wave, so that the inner conductor 1 is not interfered by the external electromagnetic wave, and the internal electromagnetic energy cannot easily go to the outside.
The insulation shielding layer 4 is mainly used for preventing the control cable from being affected by insulation damage, mechanical damage, fire or electrical interference and the like and not working normally, and for systems needing reliability enhancement, such as current, voltage, direct current power supply, trip control loop and the like, which are protected doubly, independent control cables are adopted.
The insulating layer 3 is made of semiconductive material, polyethylene as base material and carbon black.
The steel wire armor 10 is formed by annularly and tightly winding a plurality of steel wires along the surface of the lining layer 8.
Cabling fillers 6 are filled between the outer surface of the metal shielding layer 5 and the inner wall surface of the wrapping tape 7.
By the connection of the cabled filling 6, the tape 7 can be more stably positioned in the conductor 1, and the protection of the conductor 1 is improved.
The surface of the outer sheath 11 is glued with a plurality of connecting strips 13 along the length direction of the outer sheath 11, the outer sleeve layer 12 is welded outside the outer sheath 11, and the inner cavity of the outer sleeve layer 12 is provided with marking liquid outside the outer sheath 11.
When the position through a certain department of cable melts when encountering small-size fire, accessible overcoat layer 12 burns out discharge marking liquid, carries out fire-retardant through liquid to through the surface of liquid infiltration out cable, the artifical department of burning out who in time finds the cable of being convenient for carries out remedial measure
The outer surface of the outer sheath 11 is coated with an anticorrosive hydrophobic layer, and the surface of the outer sheath 12 is coated with a fireproof layer.
The anti-corrosion hydrophobic layer is improved, so that the outer sheath 11 can be prevented from being corroded by the marking liquid, and the flame retardant layer on the outer sheath 12 improves the flame retardant effect of the outer sheath 12.
The working principle of the halogen-free low-smoke power cable for the coal mine is as follows:
by the outer sheath 11 consisting of polyethylene in polyolefin, the outer sheath 11 is insulated during use, when the outer sheath 11 is in fire, the outer sheath 11 will not emit harmful gas when being heated and melted, and the outer sheath 11 generates less smoke when being heated and melted, and through the protection of the steel wire armor 10 and the steel tape armor 9, after the outer sheath 11 is burnt and melted, the inner conductor 1 is protected, so that the cable has no halogen in the use process and good flame retardant effect, the condition that a large amount of smoke and toxic corrosive gas are generated in the contact decomposition process of the cable and flame is avoided, the later rescue work is facilitated, and when the cable is melted through a certain part of the cable in a small fire, the discharged marking liquid can be burnt by the outer sleeve layer 12, flame retardance is realized through the liquid, and the burnt part of the cable can be conveniently found in time by manpower to carry out remedial measures through the liquid permeating out of the surface of the cable.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a there is not steamed low cigarette power cable for coal mine, includes oversheath (11), its characterized in that: the inner wall surface of the outer sheath (11) is woven with steel wire armors (10) along the length direction of the outer sheath (11), the inner wall surface of the steel wire armors (10) is woven with steel belt armors (9) along the length direction of the steel wire armors (10), the inner wall surface of the steel belt armors (9) is glued with an inner liner (8) along the length direction of the steel belt armors (9), the inner wall surface of the inner liner (8) is wound with a wrapping tape (7) along the length direction of the inner liner (8), the inner cavity of the wrapping tape (7) is provided with a plurality of conductors (1) along the inner cavity of the wrapping tape (7) in an annular uniform interval distribution manner, the outer surface of each conductor (1) is glued with a conductor shielding layer (2), the outer surface of each conductor shielding layer (2) is glued with an insulating layer (3), the outer surface of the insulating layer (3) is glued with an insulating shielding layer (4), the outer surface of the insulating shielding layer (4) is glued with a metal shielding layer (5), and the outer sheath (11) is made of polyolefin material.
2. The coal mine halogen-free low-smoke power cable as claimed in claim 1, wherein the steel wire armor (10) is formed by winding a plurality of steel wires annularly and tightly along the surface of the inner liner (8).
3. The coal mine halogen-free low smoke power cable as claimed in claim 1, wherein said outer sheath (11) is a protective sheath formed of polyethylene in a polyolefin material.
4. The coal mine halogen-free low-smoke power cable as claimed in claim 1, wherein a cabling filler (6) is filled between the outer surface of the metal shielding layer (5) and the inner wall surface of the wrapping tape (7).
5. The coal mine halogen-free low-smoke power cable as claimed in claim 1, wherein a plurality of connecting strips (13) are glued on the surface of the outer sheath (11) along the length direction of the outer sheath (11), an outer jacket layer (12) is welded on the outside of the outer sheath (11), and a marking liquid is arranged on the outside of the outer sheath (11) in the inner cavity of the outer jacket layer (12).
6. The coal mine halogen-free low-smoke power cable as claimed in claim 5, wherein the outer surface of the outer sheath (11) is coated with an anticorrosive hydrophobic layer, and the surface of the outer sheath (12) is coated with a fireproof layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121622578.2U CN215815352U (en) | 2021-07-16 | 2021-07-16 | Halogen-free low-smoke power cable for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121622578.2U CN215815352U (en) | 2021-07-16 | 2021-07-16 | Halogen-free low-smoke power cable for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215815352U true CN215815352U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121622578.2U Active CN215815352U (en) | 2021-07-16 | 2021-07-16 | Halogen-free low-smoke power cable for coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215815352U (en) |
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2021
- 2021-07-16 CN CN202121622578.2U patent/CN215815352U/en active Active
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