CN218214753U - Fire-resistant power cable of middling pressure - Google Patents
Fire-resistant power cable of middling pressure Download PDFInfo
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- CN218214753U CN218214753U CN202222396409.2U CN202222396409U CN218214753U CN 218214753 U CN218214753 U CN 218214753U CN 202222396409 U CN202222396409 U CN 202222396409U CN 218214753 U CN218214753 U CN 218214753U
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Abstract
The application discloses fire-resistant power cable of middling pressure relates to power cable technical field, and it is relatively poor to improve current power cable flame retardant efficiency, and the short problem of time that can maintain under the condition of catching fire, including many sinle silks, many the outside parcel of sinle silks has heat-resisting inner sheath jointly, the outside fixedly connected with high temperature resistant layer of heat-resisting inner sheath, the first fire-retardant layer of surface fixedly connected with on high temperature resistant layer, the fire-retardant layer of surface fixedly connected with second on first fire-retardant layer, the surface fixedly connected with armor on the fire-retardant layer of second, the surface fixedly connected with fire-resistant oversheath of armor. This application is through the setting of first fire-retardant layer, the fire-retardant layer of second and fire-proof material coating, can reduce the burning rate of flame, reduces the speed of stretching of flame, improves the flame retardant efficiency of cable, can prevent the burning in a certain period, prolongs the live time of cable.
Description
Technical Field
The application relates to the field of power cables, in particular to a medium-voltage fire-resistant power cable.
Background
With the continuous and high-speed development of economy in China, modern important public places such as office buildings, hotels, restaurants, railway stations and the like are more and more luxurious in decoration, and more combustible materials are used; the subway lines are built in large and medium cities of China one after another, and important public places like the subway lines require that electric wires can normally and continuously transmit electric power and various control signals and alarm signals to provide precious time for people to escape and automatically alarm under the condition of fire, and the starting of fire-fighting facilities, rescue and the use of emergency equipment, and the fire-resistant electric wires ensure that the lines are normally electrified and transmit various control signals and alarm signals within a certain time when a fire happens. The fire-resistant electric wire can supply power to the illumination, emergency broadcasting, fire-proof alarm devices, automatic fire-fighting facilities and other emergency equipment of the channel in case of fire, so that people can be evacuated in time, rescue can be normally carried out, and the reliability of the fire-resistant electric wire is very important.
In the process of implementing the present application, the inventors found that the technology has at least the following problems, and the existing power cable is generally wrapped by a single-layer fire-resistant material, has a poor flame-retardant effect, and can be maintained for a short time under a fire condition, so that a medium-voltage fire-resistant power cable is now provided.
SUMMERY OF THE UTILITY MODEL
In order to improve the problem that current power cable flame retardant efficiency is relatively poor, the time that can maintain under the condition of catching a fire is short, the application provides a fire-resistant power cable of middling pressure.
The application provides a fire-resistant power cable of middling pressure adopts following technical scheme:
a medium-voltage fire-resistant power cable comprises a plurality of wire cores, wherein a heat-resistant inner sheath wraps the outside of the wire cores together, a high-temperature-resistant layer is fixedly connected to the outside of the heat-resistant inner sheath, a first flame-retardant layer is fixedly connected to the outer surface of the high-temperature-resistant layer, and a second flame-retardant layer is fixedly connected to the outer surface of the first flame-retardant layer;
the outer surface of the second flame-retardant layer is fixedly connected with an armor layer, and the outer surface of the armor layer is fixedly connected with a fireproof outer sheath.
Through adopting above-mentioned technical scheme, through the setting on first fire-retardant layer and the fire-retardant layer of second, can reduce the burning rate of flame, reduce the speed of stretching of flame, improve the flame retardant efficiency of cable, can prevent the burning in certain time, the live time of extension cable through the setting of heat-resisting inner sheath, can play heat-resisting guard action to the sinle silk.
Optionally, the heat-resistant inner sheath is a mica tape.
By adopting the technical scheme, the mica tape has excellent high temperature resistance and combustion resistance, and can play a role in heat-resistant protection on the wire core.
Optionally, the ceramic fiber cotton layer is filled between the plurality of wire cores inside the heat-resistant inner sheath.
By adopting the technical scheme, the ceramic fiber cotton layer is a heat-insulating material with lower heat conductivity, and can further play a role in heat-resisting protection on the wire core.
Optionally, the first flame-retardant layer is a flame-retardant hot melt adhesive layer.
Through adopting above-mentioned technical scheme, fire-retardant hot melt adhesive layer has the fire resistance, can reduce the burning rate of flame, improves the flame retardant efficiency of cable.
Optionally, the second flame-retardant layer is a flame-retardant fiber woven layer.
By adopting the technical scheme, the flammability of the flame-retardant fiber is extremely low, the spreading speed of flame can be reduced, and the flame-retardant effect of the cable is further improved.
Optionally, the outer surface of the second flame-retardant layer is coated with a fireproof material coating.
By adopting the technical scheme, the fireproof coating can improve the fire resistance of the cable, slow down the spreading speed of flame and stop burning within a certain time.
Optionally, the fire-resistant outer sheath is a low-smoke halogen-free ceramic polyolefin material layer.
By adopting the technical scheme, the low-smoke halogen-free ceramic polyolefin material layer has fire resistance and can play a fire-resistant role in cables.
Optionally, the outer surface of the fire-resistant outer sheath is fixedly connected with a wear-resistant layer.
Through adopting above-mentioned technical scheme, the wearing layer is the nylon weaving layer, can improve the wearability of fire-resistant oversheath, makes the difficult wearing and tearing of fire-resistant oversheath.
In summary, the present application has the following beneficial effects:
1. according to the flame-retardant cable, the flame-retardant hot melt adhesive layer has flame retardance through the arrangement of the first flame-retardant layer, the second flame-retardant layer and the fireproof material coating, so that the burning rate of flame can be reduced, the flame-retardant effect of the cable is improved, the flammability of flame-retardant fibers is extremely low, the spreading speed of flame can be reduced, the flame-retardant effect of the cable is further improved, the fireproof coating can improve the fire resistance of the cable, the spreading propagation speed of flame can be reduced, burning can be prevented within a certain time, and the service life of the cable is prolonged;
2. this application is through the setting of heat-resisting inner sheath, and the mica tape has good high temperature resistance and combustion resistance ability, can play heat-resisting guard action to the sinle silk, through the setting on ceramic fibre cotton layer, can further play heat-resisting guard action to the sinle silk.
Drawings
Fig. 1 is a schematic diagram of the whole structure of the present application.
Fig. 2 is a schematic cross-sectional structure of the present application.
Description of reference numerals:
1. a wire core; 2. a heat-resistant inner sheath; 3. a high temperature resistant layer; 4. a first flame retardant layer; 5. a second flame retardant layer; 6. an armor layer; 7. a fire-resistant outer jacket; 8. a ceramic fiber wool layer; 9. a fire-retardant material coating; 10. and a wear-resistant layer.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
Please refer to fig. 1-2, a fire-resistant power cable of middling pressure, including many sinle silks 1, the outside parcel of many sinle silks 1 has heat-resisting inner sheath 2 jointly, and heat-resisting inner sheath 2 is the mica tape, and the mica tape has good high temperature resistance ability and combustion resistance ability, can play heat-resisting guard action to sinle silks 1. The inside packing that is located between many sinle silks 1 of heat-resisting inner sheath 2 has ceramic fiber cotton layer 8, and ceramic fiber cotton layer 8 is the lower heat insulating material of thermal conductivity, can further play heat-resisting guard action to sinle silks 1.
Wherein, the outside fixedly connected with high temperature resistant layer 3 of heat-resisting inner sheath 2, high temperature resistant layer 3 adopts the vacuum plywood material, and the vacuum plywood material has high temperature resistance, can improve the high temperature resistant effect of cable.
Referring to fig. 2, the outer surface of the high temperature resistant layer 3 is fixedly connected with a first flame-retardant layer 4, the first flame-retardant layer 4 is a flame-retardant hot-melt adhesive layer, and the flame-retardant hot-melt adhesive layer has flame retardancy, so that the burning rate of flame can be reduced, and the flame-retardant effect of the cable is improved. The outer fixed surface of first fire-retardant layer 4 is connected with fire-retardant layer 5 of second, and fire-retardant layer 5 of second is the flame retardant fiber weaving layer, and flame retardant fiber's flammability is extremely low, can reduce the speed of stretching of flame, further improves the flame retardant efficiency of cable, and simultaneously, the flame retardant fiber weaving structure of setting has certain ductility, can strengthen the pull resistance of cable. The surface on fire-retardant layer 5 of second is scribbled and is equipped with fire-resistant material coating 9, and fire-resistant material coating 9 is scribbled by fire retardant coating and is established and form, and in fire retardant fiber weaving layer gap on fire-resistant layer 5 of fire-resistant coating infiltration second, the structural stability of reinforcing fire retardant fiber weaving layer, fire retardant coating can improve the fire-resistant ability of cable, slows down flame spread propagation velocity, can prevent the burning in certain time.
Referring to fig. 2, an armor layer 6 is fixedly connected to the outer surface of the second flame retardant layer 5, a fire-resistant outer sheath 7 is fixedly connected to the outer surface of the armor layer 6, the fire-resistant outer sheath 7 is a low-smoke halogen-free ceramic polyolefin material layer, the low-smoke halogen-free ceramic polyolefin material layer has fire resistance, and the low-smoke halogen-free ceramic polyolefin material layer can be sintered into a very hard ceramic inorganic substance shell under the aerobic or anaerobic condition above 350 ℃, so that the fire resistance of the cable is further increased. The outer surface of the fire-resistant outer sheath 7 is fixedly connected with the wear-resistant layer 10, the wear-resistant layer 10 is a nylon woven layer, the wear resistance of the fire-resistant outer sheath 7 can be improved, and the fire-resistant outer sheath 7 is not prone to abrasion.
The application has the implementation principle that: through first fire-retardant layer 4, the setting of fire-retardant layer 5 of second and fireproof material coating 9, fire-retardant hot melt adhesive layer has the fire retardance, can reduce the burning rate of flame, improve the flame retardant efficiency of cable, flame retardant fiber's flammability is extremely low, can reduce the speed of stretching of flame, further improve the flame retardant efficiency of cable, fire retardant coating can improve the fire-resistant ability of cable, slow down flame spread propagation speed, can prevent the burning at the certain time, prolong the live time of cable, setting through heat-resisting inner sheath 2, the mica tape has good high temperature resistance and burning resistance ability, can play heat-resisting guard action to sinle silk 1.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a fire-resistant power cable of middling pressure, includes many sinle silks (1), its characterized in that: the heat-resistant inner sheath (2) wraps the outside of the wire cores (1) together, the outside of the heat-resistant inner sheath (2) is fixedly connected with a high-temperature-resistant layer (3), the outer surface of the high-temperature-resistant layer (3) is fixedly connected with a first flame-retardant layer (4), and the outer surface of the first flame-retardant layer (4) is fixedly connected with a second flame-retardant layer (5);
the outer surface of the second flame-retardant layer (5) is fixedly connected with an armor layer (6), and the outer surface of the armor layer (6) is fixedly connected with a fire-resistant outer sheath (7).
2. A medium voltage fire resistant power cable according to claim 1, characterized in that: the heat-resistant inner sheath (2) is a mica tape.
3. A medium voltage fire resistant power cable according to claim 1, characterized in that: the heat-resistant inner sheath (2) is internally positioned among the plurality of wire cores (1) and is filled with a ceramic fiber cotton layer (8).
4. A medium voltage fire resistant power cable according to claim 1, characterized in that: the first flame-retardant layer (4) is a flame-retardant hot melt adhesive layer.
5. A medium voltage fire resistant power cable according to claim 1, characterized in that: the second flame-retardant layer (5) is a flame-retardant fiber woven layer.
6. A medium voltage fire resistant power cable according to claim 1, characterized in that: and the outer surface of the second flame-retardant layer (5) is coated with a fireproof material coating (9).
7. A medium voltage fire resistant power cable according to claim 1, characterized in that: the fireproof outer sheath (7) is a low-smoke halogen-free ceramic polyolefin material layer.
8. A medium voltage fire resistant power cable according to claim 1, characterized in that: and the outer surface of the fireproof outer sheath (7) is fixedly connected with a wear-resistant layer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396409.2U CN218214753U (en) | 2022-09-08 | 2022-09-08 | Fire-resistant power cable of middling pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396409.2U CN218214753U (en) | 2022-09-08 | 2022-09-08 | Fire-resistant power cable of middling pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218214753U true CN218214753U (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222396409.2U Active CN218214753U (en) | 2022-09-08 | 2022-09-08 | Fire-resistant power cable of middling pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218214753U (en) |
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2022
- 2022-09-08 CN CN202222396409.2U patent/CN218214753U/en active Active
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