CN210805322U - Halogen-free low-smoke flame-retardant fire-resistant power cable for low-voltage distribution system of building residence - Google Patents
Halogen-free low-smoke flame-retardant fire-resistant power cable for low-voltage distribution system of building residence Download PDFInfo
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- CN210805322U CN210805322U CN201922252282.5U CN201922252282U CN210805322U CN 210805322 U CN210805322 U CN 210805322U CN 201922252282 U CN201922252282 U CN 201922252282U CN 210805322 U CN210805322 U CN 210805322U
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Abstract
The utility model discloses a building house low pressure distribution system is with there being not steamed fire-retardant fire-resistant power cable of low cigarette of cigarette, the cable core form by many insulation core and the transposition of a fire alarm line, fill inorganic glass silk cellosilk while at the space department of cable core around the first band layer of package outward, crowded package high fire-retardant fire barrier layer outside first band layer, around package second band layer outside high fire-retardant fire barrier layer, around package second flame retardant coating outside second band layer, crowded package oversheath again outside second flame retardant layer around package third band layer after. The cable has excellent electrical performance, high heat resistance, high fire resistance, high flame retardance, low smoke, no halogen and environmental protection, and the long-term service life of the cable reaches more than 70 years.
Description
Technical Field
The utility model relates to a wire and cable field specifically indicates a building house low pressure distribution system is with there being not steamed fire-retardant fire-resistant power cable of low cigarette.
Background
With the rapid development of economy in China and the continuous promotion of urbanization, the comprehensive performance requirement of the cable for the low-voltage distribution system of the residential district of the urban building is higher and higher, and the service life and the fire safety reliability of the cable are particularly concerned; from 1992, a large number of commodity houses built in China begin to change wiring modes from open wires to dark wires; at that time, the service life of the national standard product is only 25 years due to factors such as technology, process and materials; at present, the property of a commercial house is determined to be 70 years by the nation, the general service life of a conventional cable is only 25-30 years, the serious asynchronism between the service life of the cable and the service life of the property of the house occurs, if the service life of the cable is due, the cable is not replaced, potential safety hazards are generated, in recent years, the cable in a residential area is aged to generate electrical faults, so that huge personal injury and property loss are caused by fire disasters, and if the construction cost of replacement is quite high, the 70-year long-service-life high-performance low-smoke halogen-free flame-retardant fire-resistant cable which is consistent with the service life.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a building house low pressure distribution system is with there being not steamed fire-retardant fire-resistant power cable of low cigarette of cigarette is provided, this cable has excellent electrical property, high heat resistance, high fire-retardant, low cigarette does not have the halogen feature of environmental protection, and long-term life reaches more than 70 years.
In order to achieve the above object, the utility model adopts the following technical scheme: a kind of building house low-voltage power distribution system uses the fire-retardant fire-resistant power cable of halogen-free low smoke, including the cable core, the said cable core is twisted by three insulation core, a central line, a earth connection and a fire control alarm wire, the insulation core is the same with cross section of the central line, the cross section of the earth connection is smaller than insulation core and central line; filling inorganic glass fiber yarns in the gap of the cable core, wrapping a first wrapping layer outside the cable core, extruding and wrapping a high-flame-retardant fire-isolating layer outside the first wrapping layer, wrapping a second wrapping layer outside the high-flame-retardant fire-isolating layer, wrapping a second fireproof layer outside the second wrapping layer, and extruding and wrapping an outer sheath after wrapping a third wrapping layer outside the second fireproof layer.
The improved cable is characterized in that the structure of the insulating cable core, the structure of the central line and the structure of the grounding wire are the same, and the insulating cable core, the central line and the grounding wire are formed by a conductor, a double layer of inner insulating layers and outer insulating layers which are sequentially co-extruded outside the conductor and a first fireproof layer which is wrapped outside the outer insulating layers.
The conductor is a compressed round conductor meeting the GB/T3956-2008 specification, the compression coefficient reaches 0.9, and a compression mould adopts a new nano-coating technology to ensure that the surface of the conductor is smooth and seamless.
The inner insulating layer is a 125 ℃ irradiation crosslinking polyethylene insulating layer, has excellent electrical insulating performance, has insulation resistance and dielectric loss coefficient equivalent to those of common crosslinking polyethylene, but the working temperature is increased to 125 ℃ from 90 ℃ of the conventional crosslinking polyethylene, and the thermal aging life of the cable is effectively prolonged;
the outer insulating layer is a low-smoke halogen-free irradiation cross-linked polyolefin insulating layer, has excellent low-smoke halogen-free flame retardant property, can effectively make up for the non-flame retardant property of the inner insulating layer, ensures the flame retardant property of the whole cable, ensures that the heat-resistant temperature of the outer insulating layer reaches 125 ℃, is matched with the inner insulating layer, and ensures the heat aging life of the whole cable;
in a further improvement, the first fire-proof layer is a ceramic polyolefin fire-proof layer,
in a further improvement, the first, second and third band layers are inorganic glass fiber bands.
The improved high flame-retardant fire-isolating layer is a high flame-retardant halogen-free low-smoke polyolefin fire-isolating layer.
In a further improvement, the second fire-proof layer is a ceramic polyolefin fire-proof layer.
The improvement is further realized, the outer sheath is a 125 ℃ irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin outer sheath, the working temperature is consistent with the insulation guarantee, the heat aging service life of the whole cable is ensured, and the cable is protected and has good low-smoke, halogen-free and flame-retardant characteristics.
The beneficial effects of the utility model reside in that:
1. compared with the conventional power cable, the heat resistance of the cable is greatly improved, the long-term working temperature of the conventional power cable is 90 ℃, the heat aging temperature is 135 ℃, the long-term service life is about 25-30 years, the long-term working temperature of the cable is 125 ℃, the long-term heat aging temperature reaches 158 ℃, the service life reaches more than 70 years, the cable is synchronized with the property of a house, and the cable does not need to be replaced.
2. The fire resistance of the cable is improved, the conventional fire-resistant cable can pass a fire resistance test at the flame temperature of 750 ℃ for 90min to keep the smooth of the line, and the cable can pass a fire resistance test at the flame temperature of more than 950 ℃ for 120min to keep the smooth of the line. Ensure that the cable has a higher fire safety level.
3. The cable has excellent electrical properties, and simultaneously has high flame retardance and low smoke halogen-free environmental protection performance, wherein the flame retardance exceeds the bundled A-class highest flame retardance grade specified by the national standard, the combustion smoke yield is lower than the national standard, and the light transmittance exceeds 60 percent of the national standard and reaches 80 percent.
4. The fire-retardant fire-resistant pair twist shielded wire of low smoke and zero halogen has been made up in the main cable, the main function of this cable is as fire control signal alarm line, with main cable performance always, satisfy the requirement of using, can report to the police in advance when the conflagration takes place, the primary action of pair twist shielded wire is transmission signal, the conflagration condition appears, alarm signal can in time be transmitted, in time inform the fire fighter to rescue, reduce the loss that the conflagration caused, also need not lay fire control signal alarm line alone simultaneously, simplify the construction of cable, in addition, will make up in main part cable pair twist shielded signal cable, the problem that the small cable caused the bruise easily when laying alone has also been prevented.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, the halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building comprises a cable core, wherein the cable core is formed by twisting three insulating wire cores, a central line, a grounding wire and a fire alarm wire 12, the cross sections of the insulating wire cores and the central line are the same, and the cross section of the grounding wire is smaller than that of the insulating wire cores and the central line; the insulated wire core, the central line and the grounding wire are identical in structure and are composed of a conductor 1, an inner insulating layer 2, an outer insulating layer 3 and a first fireproof layer 4, wherein the two layers of the inner insulating layer and the outer insulating layer are sequentially co-extruded outside the conductor in a double-layer mode, and the first fireproof layer is wrapped outside the outer insulating layer; the conductor adopts a compressed round conductor meeting the GB/T3956-2008 regulation, the compression coefficient reaches 0.9, and the compression mould adopts a new nano-coating technology to ensure that the surface of the conductor is smooth and seamless; the insulation adopts double-layer insulation, inner insulation and outer insulation, the production process adopts a double-layer co-extrusion technology to ensure that the inner and outer double-layer insulation are combined into a whole, the inner insulation adopts a 125 ℃ irradiation crosslinking polyethylene insulation layer, the cable has excellent electrical insulation performance, the insulation resistance and the dielectric loss coefficient of the cable are equivalent to those of common crosslinking polyethylene, but the working temperature is improved to 125 ℃ from 90 ℃ of the common crosslinking polyethylene, and the thermal aging life of the cable is effectively prolonged; the outer layer insulation adopts a low-smoke halogen-free irradiation cross-linked polyolefin insulation layer, so that the cable has excellent low-smoke halogen-free flame retardant property, the non-flame retardant property of the inner insulation can be effectively compensated, the flame retardant property of the whole cable is ensured, the heat-resistant temperature of the outer insulation also reaches 125 ℃, the outer insulation is matched with the inner insulation, and the heat aging life of the whole cable is ensured; the inner insulation ensures the electric insulation performance of the cable, and the outer insulation ensures the flame retardant performance of the cable, the inner insulation and the outer insulation adopt a double-layer co-extrusion technology and are basically combined into a whole, and all performance indexes of the whole cable are ensured to reach the service life; an independent fireproof layer is arranged outside the cable insulation, and the ceramic polyolefin fireproof layer can withstand long-term ablation when the flame temperature reaches above 950 ℃, and ceramic incrustation can effectively prevent flame from burning towards the inside of the insulation and ensure that the cable is smooth in line within 120 min;
filling inorganic glass fiber yarns 5 in gaps of the cable core, and wrapping a first wrapping layer 6, specifically an inorganic glass fiber tape, outside the cable core, so as to ensure the flame retardance and low smoke performance inside the cable; the high flame-retardant fire-insulating layer 7 is extruded outside the first wrapping band layer and is prepared by adopting a high flame-retardant halogen-free low-smoke polyolefin material, a large amount of inorganic materials such as magnesium hydroxide and aluminum hydroxide are added into the material to serve as a flame retardant, so that an effective flame-retardant effect is achieved, and the magnesium hydroxide and the aluminum hydroxide are subjected to chemical reaction at high temperature to generate water, so that a cooling effect can be effectively achieved, and the flame is prevented from spreading; a second wrapping tape layer 8, specifically an inorganic glass fiber tape, is wrapped outside the high-flame-retardant fire-barrier layer, so that the flame-retardant and low-smoke performance inside the cable is further improved; a second fireproof layer 9 is wrapped outside the second wrapping layer, a ceramic polyolefin fireproof layer is adopted to form a second fireproof barrier, the fireproof layer and the fireproof layer arranged on the insulating wire core form a synergistic effect, and the fire resistance test of the cable at the flame temperature of more than 950 ℃ for 120min can be effectively guaranteed; meanwhile, a third wrapping tape layer 10, in particular an inorganic glass fiber tape, is wrapped outside the ceramic polyolefin fireproof layer, and not only has the flame-retardant effect, but also can effectively ensure the integrity of the crust of the ceramic polyolefin fireproof layer, thereby effectively ensuring the further spread of flame; and finally, the outer sheath 11 is extruded outside the third wrapping layer, a 125 ℃ irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath is adopted, the working temperature is consistent with the insulation guarantee, the heat aging service life of the whole cable is ensured, and the cable has good low-smoke, halogen-free and flame-retardant characteristics while the cable is protected. The fire-retardant fire-resistant pair twist shielded wire of low smoke and zero halogen has been made up in main part cable (shielding pair twist line is two core insulation core pair twist, the shielding is woven to the copper wire, the oversheath is the fire-retardant polyolefin sheath of halogen-free low smoke), this pair twist shielded wire itself designs for the fire-retardant fire-resistant cable of low smoke and zero halogen, it is unanimous with the cable coordination, this cable mainly is as fire control signal alarm line, be used for transmitting alarm signal, alarm signal can in time send when the conflagration takes place, inform the fire fighter to rescue to the scene, can reduce the loss that the.
Example 1:
the preparation process of the halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building comprises the following steps:
firstly, compressing a round conductor, wherein an annealed bare copper wire is adopted in a production mode and is stranded on other types of stranding machines, a plurality of copper single wires are stranded, and the stranded copper conductor with smooth and round appearance is obtained by drawing and compressing through a compression die;
secondly, the inner insulation and the outer insulation are extruded and formed at one time in a double-layer co-extrusion mode, and are produced at one time through a double-layer co-extruder head on phi 65+120 double-layer co-extrusion equipment, so that the inner insulation and the outer insulation are guaranteed to be made of different materials and can be effectively combined into a whole to form a layer of insulation;
thirdly, the fireproof layer is produced by adopting an extrusion process, and is realized on an extruding machine, the plastic is heated and plasticized, is further compacted and plasticized by a screw with a low compression ratio, is conveyed to a machine head, and is uniformly coated on the cable core through a mold;
and fourthly, cabling the plurality of wire cores in a stranding mode, producing the cable on a cabling machine, filling an inorganic glass fiber rope in the gap of the cable core while cabling, dragging the alarm signal wire into the gap of the cable core, requiring the dense filling, arranging the alarm signal wire in the center of the filling rope, and then wrapping a glass fiber binding band outside.
Fifthly, the flame retardant coating, separate fire layer, flame retardant coating, oversheath all adopt extrusion technology to produce, further the compaction plastify through low-pressure compression ratio screw rod with plastics heating plastify to carry the aircraft nose, evenly coat on the cable core through the mould, thereby obtain building house low voltage distribution system with there being not steamed low fire-retardant fire-resistant power cable of cigarette.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.
Claims (10)
1. A kind of building house low-voltage power distribution system uses the fire-retardant fire-resistant power cable of halogen-free low smoke, characterized by that, including the cable core, the said cable core is twisted by three insulation core, a central line, a earth connection and a fire control alarm wire, the insulation core is the same with cross section of the central line, the cross section of the earth connection is smaller than insulation core and central line; filling inorganic glass fiber yarns in the gap of the cable core, wrapping a first wrapping layer outside the cable core, extruding and wrapping a high-flame-retardant fire-isolating layer outside the first wrapping layer, wrapping a second wrapping layer outside the high-flame-retardant fire-isolating layer, wrapping a second fireproof layer outside the second wrapping layer, and extruding and wrapping an outer sheath after wrapping a third wrapping layer outside the second fireproof layer.
2. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building according to claim 1, wherein the insulated wire core, the central line and the grounding wire have the same structure and are formed by a conductor, a double-layer inner insulating layer and an outer insulating layer which are sequentially co-extruded outside the conductor, and a first fire-proof layer which is wrapped outside the outer insulating layer.
3. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 2, wherein the conductor is a compacted round conductor in accordance with the specification of GB/T3956-2008.
4. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 2, wherein the inner insulating layer is a 125 ℃ irradiation cross-linked polyethylene insulating layer.
5. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 2, wherein said outer insulating layer is a low-smoke halogen-free irradiated cross-linked polyolefin insulating layer.
6. The halogen-free, low-smoke, flame-retardant and fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 2, wherein said first fire-resistant layer is a ceramic polyolefin fire-resistant layer.
7. The halogen-free low-smoke flame-retardant fire-resistant power cable for the residential low-voltage distribution system of a building according to claim 1, wherein the first, second and third wrapping layers are inorganic glass fiber tapes.
8. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 1, wherein said high flame-retardant fire barrier is a high flame-retardant halogen-free low-smoke polyolefin fire barrier.
9. The halogen-free, low-smoke, flame-retardant and fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 1, wherein said second fire-resistant layer is a ceramic polyolefin fire-resistant layer.
10. The halogen-free low-smoke flame-retardant fire-resistant power cable for the low-voltage distribution system of the residential building as claimed in claim 1, wherein the outer sheath is a 125 ℃ irradiation cross-linked low-smoke halogen-free flame-retardant polyolefin outer sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922252282.5U CN210805322U (en) | 2019-12-16 | 2019-12-16 | Halogen-free low-smoke flame-retardant fire-resistant power cable for low-voltage distribution system of building residence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922252282.5U CN210805322U (en) | 2019-12-16 | 2019-12-16 | Halogen-free low-smoke flame-retardant fire-resistant power cable for low-voltage distribution system of building residence |
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| Publication Number | Publication Date |
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| CN210805322U true CN210805322U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922252282.5U Active CN210805322U (en) | 2019-12-16 | 2019-12-16 | Halogen-free low-smoke flame-retardant fire-resistant power cable for low-voltage distribution system of building residence |
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| Country | Link |
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| CN (1) | CN210805322U (en) |
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