CN210722558U - Medium-voltage fireproof cable for intelligent early warning communication - Google Patents
Medium-voltage fireproof cable for intelligent early warning communication Download PDFInfo
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- CN210722558U CN210722558U CN201821807710.5U CN201821807710U CN210722558U CN 210722558 U CN210722558 U CN 210722558U CN 201821807710 U CN201821807710 U CN 201821807710U CN 210722558 U CN210722558 U CN 210722558U
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Abstract
The utility model discloses a medium voltage fireproof cable for intelligent early warning communication, including at least one power transmission unit and optical transmission unit, the power transmission unit comprises copper conductor, from inside to outside cladding conductor shielding layer, insulating layer and insulating shielding layer of copper conductor surface and cladding the metallic shield layer of insulating shielding layer surface, the optical transmission unit further includes the sheath and is located by the distributed temperature sensing optic fibre and the communication optic fibre of sheath inside; the belt wraps the power transmission unit and the light transmission unit to form a first wrapping layer, an oxygen isolation layer wraps the outer surface of the first wrapping layer, and a fire-resistant layer wraps the outer surface of the oxygen isolation layer; a second wrapping layer is wrapped on the outer surface of the fire-resistant layer in a wrapping mode, and the outer sheath is wrapped on the outer surface of the second wrapping layer in an extruding mode; the distributed optical fiber temperature measurement system has good fireproof and flame-retardant performances, can achieve the purposes of timely finding out the disaster and early warning at the initial stage of fire, and provides time guarantee for escape and disaster relief.
Description
Technical Field
The utility model relates to a cable especially relates to an intelligence is middling pressure fireproof cable for early warning communication.
Background
With the rapid development of social economy in China, important engineering facilities such as large buildings, subways, tunnels, nuclear power stations and the like and places such as large supermarkets, exhibition centers and the like with intensive personnel are more and more, and the requirements on flame retardance and fire resistance of wires and cables are higher and higher. Once a medium-voltage line in a building is on fire and short-circuited, other power distribution systems cannot operate normally, so that fire prevention and fire early warning of medium-voltage cables are particularly important.
At present, fireproof cables on the market can meet the requirements of TICW.8-2012 tests, and part of medium-voltage fireproof cables can play a role in communication, but cannot monitor the cable core temperature under normal working conditions and fire working conditions, and cannot play the roles of load monitoring, fault alarm positioning and fire early warning. Therefore, how to develop a medium voltage fireproof cable for intelligent early warning communication, which can be used in a distributed optical fiber temperature measurement system, becomes an effort for those skilled in the art.
Disclosure of Invention
The utility model aims at providing an intelligence early warning middling pressure fireproof cable for communication, this cable fire prevention fire behaviour is good, and usable distributed optical fiber temperature measurement system (DTS) monitors the cable core temperature under normal operating mode and the conflagration operating mode, plays load monitoring, fault alarm location and conflagration early warning effect, in time discovers the purpose of disaster and early warning at the initial stage takes place in the conflagration, provides the time guarantee for fleing and relief of disaster.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a medium-voltage fireproof cable for intelligent early warning communication comprises at least one power transmission unit and an optical transmission unit, wherein the power transmission unit consists of a copper conductor, a conductor shielding layer, an insulating shielding layer and a metal shielding layer, the conductor shielding layer, the insulating layer and the insulating shielding layer are coated on the outer surface of the copper conductor from inside to outside, the metal shielding layer is coated on the outer surface of the insulating shielding layer, and the optical transmission unit further comprises a sheath, and a distributed temperature sensing optical fiber and a communication optical fiber which are positioned inside the sheath;
the belt wraps the power transmission unit and the light transmission unit to form a first wrapping layer, an oxygen isolating layer wraps the outer surface of the first wrapping layer, a fire-resistant layer wraps the outer surface of the oxygen isolating layer, a plurality of protruding portions are arranged on the inner surface of the fire-resistant layer along the circumferential direction, and the protruding portions are embedded into grooves of the oxygen isolating layer;
the outer surface of the fire-resistant layer is wrapped with a second wrapping layer, and the outer sheath is extruded and wrapped on the outer surface of the second wrapping layer.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the glass fiber filling rope is filled between the first wrapping layer and the power transmission unit and between the first wrapping layer and the light transmission unit.
2. In the above scheme, the copper conductor is a 2 nd conductor formed by twisting and pressing a plurality of strands of annealed copper wires.
3. In the above scheme, the metal shielding layer is formed by overlapping and wrapping copper strips.
4. In the scheme, the oxygen isolation layer is a low-smoke halogen-free polyolefin oxygen isolation layer.
5. In the above scheme, the refractory layer is an inorganic oxide refractory layer.
6. In the scheme, the outer sheath is a low-smoke halogen-free polyolefin flame-retardant sheath.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:
1. the utility model discloses medium-voltage fireproof cable is used in intelligence early warning communication is provided with communication optic fibre and distributing type temperature sensing optic fibre in its light transmission unit sheath, makes it not only can play the communication effect, also can be used to distributing type optic fibre temperature measurement system (DTS), carries out real-time supervision to cable core temperature, plays the effect of load monitoring, malfunction alerting location, still can play the effect of conflagration early warning, provides the time guarantee for fleing and relief of disaster.
2. The utility model discloses medium voltage fireproof cable for intelligent early warning communication, it adopts combined type fireproof structure, by outer low smoke and zero halogen polyolefin fire-retardant sheath that does not produce toxic gas when adopting respectively to guarantee the cable burning in to, can crust and isolate flame and reduce the inorganic oxide flame retardant coating of cable surface temperature when burning, can hydrolyze the low smoke and zero halogen polyolefin oxygen barrier that the cooling further reduces the cable core temperature during high temperature, in addition still set up fire-resistant glass fiber filling rope and pack between first around covering and power transmission unit and light transmission unit; the thermal insulation fireproof performance is good, the optical fiber attenuation can be effectively reduced when a fire disaster occurs, and the optical fiber communication is ensured.
3. The utility model discloses medium voltage fireproof cable for intelligent early warning communication, its flame retardant coating internal surface has a plurality of juts along circumference, and this jut imbeds in the recess that separates the oxygen layer, makes the flame retardant coating and separate the oxygen layer to combine more closely, prevents that flame from spreading longitudinally, has further improved the fire behavior of cable; meanwhile, the condition of layering or axial deviation between layers is avoided when the cable is used in cutting, winding or dragging occasions, the service life and the structural reliability of the cable are improved, and the cable has good practical value and popularization value.
Drawings
FIG. 1 is a schematic structural view of a medium voltage fireproof cable for intelligent early warning communication according to the present invention;
1. a power transmission unit; 11. a copper conductor; 12. a conductor shield layer; 13. an insulating layer; 14. an insulating shield layer; 15. a metal shielding layer; 2. an optical transmission unit; 21. a sheath; 22. a distributed temperature sensing optical fiber; 23. a communication optical fiber; 3. a first lapping layer; 4. an oxygen barrier layer; 41. a groove; 5. a refractory layer; 51. a protrusion portion; 6. a second lapping layer; 7. an outer sheath; 8. and (4) filling the ropes with glass fibers.
Detailed Description
Example 1: a medium-voltage fireproof cable for intelligent early warning communication comprises three power transmission units 1 and three optical transmission units 2, wherein each power transmission unit 1 consists of a copper conductor 11, a conductor shielding layer 12, an insulating layer 13, an insulating shielding layer 14 and a metal shielding layer 15, the conductor shielding layer 12, the insulating layer 13 and the insulating shielding layer 14 are coated on the outer surface of the copper conductor 11 from inside to outside, the metal shielding layer 15 is coated on the outer surface of the insulating shielding layer 14, and each optical transmission unit 2 further comprises a sheath 21, and a distributed temperature sensing optical fiber 22 and a communication optical fiber 23 which are positioned inside the sheath 21;
a first wrapping layer 3 is formed by wrapping the outer surfaces of the power transmission unit 1 and the light transmission unit 2 with a belt, the outer surface of the first wrapping layer 3 is wrapped with an oxygen isolation layer 4, the outer surface of the oxygen isolation layer 4 is wrapped with a fire-resistant layer 5, the inner surface of the fire-resistant layer 5 is circumferentially provided with twelve protruding parts 51, and the protruding parts 51 are embedded into the grooves 41 of the oxygen isolation layer 4;
a second wrapping layer 6 is wrapped on the outer surface of the fire-resistant layer 5 in a wrapping mode, and the outer sheath 7 is extruded on the outer surface of the second wrapping layer 6;
glass fiber filling ropes 8 are filled between the first wrapping layer 3 and the power transmission unit 1 and between the first wrapping layer and the optical transmission unit 2;
the copper conductor 11 is a 2 nd conductor formed by stranding and pressing a plurality of strands of annealed copper wires;
the metal shielding layer 15 is formed by lapping and wrapping copper strips.
Example 2: a medium-voltage fireproof cable for intelligent early warning communication comprises three power transmission units 1 and three optical transmission units 2, wherein each power transmission unit 1 consists of a copper conductor 11, a conductor shielding layer 12, an insulating layer 13, an insulating shielding layer 14 and a metal shielding layer 15, the conductor shielding layer 12, the insulating layer 13 and the insulating shielding layer 14 are coated on the outer surface of the copper conductor 11 from inside to outside, the metal shielding layer 15 is coated on the outer surface of the insulating shielding layer 14, and each optical transmission unit 2 further comprises a sheath 21, and a distributed temperature sensing optical fiber 22 and a communication optical fiber 23 which are positioned inside the sheath 21;
a first wrapping layer 3 is formed by wrapping the power transmission unit 1 and the light transmission unit 2 with a belt, the outer surface of the first wrapping layer 3 is wrapped with an oxygen isolation layer 4, the outer surface of the oxygen isolation layer 4 is wrapped with a fire-resistant layer 5, the inner surface of the fire-resistant layer 5 is circumferentially provided with eight protruding parts 51, and the protruding parts 51 are embedded into the grooves 41 of the oxygen isolation layer 4;
a second wrapping layer 6 is wrapped on the outer surface of the fire-resistant layer 5 in a wrapping mode, and the outer sheath 7 is extruded on the outer surface of the second wrapping layer 6;
the oxygen-isolating layer 4 is a low-smoke halogen-free polyolefin oxygen-isolating layer;
the refractory layer 5 is an inorganic oxide refractory layer;
the outer sheath 7 is a low-smoke halogen-free polyolefin flame-retardant sheath.
When the medium-voltage fireproof cable for intelligent early warning communication is adopted, the medium-voltage fireproof cable not only can play a role in communication, but also can be used for a distributed optical fiber temperature measurement system (DTS) to monitor the temperature of a cable core of the cable in real time, play roles in load monitoring and fault alarm positioning, play a role in fire early warning, and provide time guarantee for escape and disaster relief; the heat insulation and fire prevention performance is good, the optical fiber attenuation can be effectively reduced when a fire disaster occurs, and the optical fiber communication is ensured; when the test is carried out according to the TICW8-2012 specification, the fire supply time is 180min, the flame temperature is 950 +/-40 ℃, and the rated voltage U of the cable is applied in the whole test process0The cable is not broken down, and 3.5U is applied to the cable within one hour after the test is finished0The voltage lasts for 15min, the cable does not break down, and the light unit has no attenuation change within 15 minutes from the start of flame burning.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides an intelligence early warning medium voltage fireproof cable for communication which characterized in that: the optical fiber temperature-sensing optical;
a first wrapping layer (3) is formed by wrapping a belt around the power transmission unit (1) and the light transmission unit (2), an oxygen isolating layer (4) wraps the outer surface of the first wrapping layer (3), a fire-resistant layer (5) wraps the outer surface of the oxygen isolating layer (4), a plurality of protruding parts (51) are arranged on the inner surface of the fire-resistant layer (5) along the circumferential direction, and the protruding parts (51) are embedded into grooves (41) of the oxygen isolating layer (4);
the outer surface of the fire-resistant layer (5) is wrapped with a second wrapping layer (6), and an outer sheath (7) is extruded and wrapped on the outer surface of the second wrapping layer (6).
2. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: and a glass fiber filling rope (8) is filled between the first wrapping layer (3) and the power transmission unit (1) and between the first wrapping layer and the light transmission unit (2).
3. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: the copper conductor (11) is a 2 nd conductor formed by stranding and pressing a plurality of strands of annealed copper wires.
4. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: the metal shielding layer (15) is formed by lapping and wrapping copper strips in an overlapping mode.
5. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: the oxygen isolation layer (4) is a low-smoke halogen-free polyolefin oxygen isolation layer.
6. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: the refractory layer (5) is an inorganic oxide refractory layer.
7. The medium voltage fireproof cable for intelligent early warning communication according to claim 1, wherein: the outer sheath (7) is a low-smoke halogen-free polyolefin flame-retardant sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821807710.5U CN210722558U (en) | 2018-11-02 | 2018-11-02 | Medium-voltage fireproof cable for intelligent early warning communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821807710.5U CN210722558U (en) | 2018-11-02 | 2018-11-02 | Medium-voltage fireproof cable for intelligent early warning communication |
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| CN210722558U true CN210722558U (en) | 2020-06-09 |
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| CN201821807710.5U Active CN210722558U (en) | 2018-11-02 | 2018-11-02 | Medium-voltage fireproof cable for intelligent early warning communication |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237571A (en) * | 2021-05-06 | 2021-08-10 | 广州番禺电缆集团有限公司 | Control method and device for fire-proof isolation of medium-high voltage cable connector |
| CN116543967A (en) * | 2023-04-19 | 2023-08-04 | 江苏通光强能输电线科技有限公司 | Medium-voltage composite fire-resistant cable with temperature measurement control system |
-
2018
- 2018-11-02 CN CN201821807710.5U patent/CN210722558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237571A (en) * | 2021-05-06 | 2021-08-10 | 广州番禺电缆集团有限公司 | Control method and device for fire-proof isolation of medium-high voltage cable connector |
| CN116543967A (en) * | 2023-04-19 | 2023-08-04 | 江苏通光强能输电线科技有限公司 | Medium-voltage composite fire-resistant cable with temperature measurement control system |
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