CN220420311U - Fire-resistant power cable - Google Patents
Fire-resistant power cable Download PDFInfo
- Publication number
- CN220420311U CN220420311U CN202321643579.4U CN202321643579U CN220420311U CN 220420311 U CN220420311 U CN 220420311U CN 202321643579 U CN202321643579 U CN 202321643579U CN 220420311 U CN220420311 U CN 220420311U
- Authority
- CN
- China
- Prior art keywords
- fire
- resistant
- layer
- power cable
- single wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003063 flame retardant Substances 0.000 claims abstract description 10
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 7
- 239000004945 silicone rubber Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model relates to the technical field of cables and discloses a fire-resistant power cable which comprises a plurality of single wire cores, wherein shielding layers, armor layers, fire-resistant isolation layers, flame-retardant halogen-free composite belts and protective layers are sequentially wrapped on the outer sides of the single wire cores, a center column is arranged at the center of each single wire core, three reinforcing rods are arranged on the outer side wall of each center column in an annular array mode, and an anti-compression plate is fixedly connected to the end portion, far away from the center column, of each reinforcing rod. The fire-resistant isolation layer is made of a fire-resistant insulating material, the fire-resistant halogen-free composite belt can improve overall fire resistance, when a cable is subjected to high-temperature fire or an external fire invaded device, the fire-resistant isolation layer and the fire-resistant halogen-free composite belt can respectively block fire from spreading, the tensile and dragging capacity and the tear resistance of the cable are enhanced through the compression-resistant plate, and the pressure born by the compression-resistant plate is led into a central column through a reinforcing rod to be digested, and the central column is made of silicone rubber and can perform good force unloading effect on larger pressure.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a fire-resistant power cable.
Background
The cable is a wire provided with an insulating layer and a protective sheath, and is formed by combining a plurality of wires insulated from each other. The multi-rack cable is arranged in the air or underground and underwater and is used for telecommunication or power transmission, fire disaster is easily caused by short circuit or external high temperature in the cable, and the halogen-free flame-retardant fire-resistant cable has good fire resistance and can not emit toxic gas during combustion, so that the cable has very wide application.
The bulletin number is: the Chinese patent of CN112017809B discloses a crosslinked polyethylene insulation low-smoke halogen-free fire-resistant power cable, which comprises a main cable, wherein the main cable comprises an outer sheath, the periphery of the inner side of the outer sheath is provided with a steel tape armor, the inner side of the steel tape armor is provided with an inner sheath close to the middle position, the periphery of the inner side of the inner sheath is provided with a wrapping belt, the middle position of the wrapping belt is filled with filled PVC, and three groups of auxiliary conductors are uniformly arranged on the inner side of the filled PVC; the utility model can improve the integral toughness of the main cable, prevent the main cable body from being damaged due to external force, protect the main cable body, ensure the normal use of the main cable, effectively prevent the steel belt from being sheathed on the inner side of the outer sheath and sliding in the cable pulling process, prevent the cable from slipping off in the internal disassembly process, play a certain role in insulating and preventing water vapor for the internal conductor, and prevent the copper conductor from being partially damaged to influence the normal use effect.
Conventional devices have some drawbacks during use, such as: the low-smoke halogen-free flame-retardant fire-resistant power cable on the market is difficult to prevent fire caused by high temperature in the cable, and after the flame retardant is filled, the cable is loose in the interior, the extrusion resistance is poor, and the outer insulating layer is easy to crack due to extrusion.
Disclosure of Invention
The utility model aims to provide a fire-resistant power cable, which solves the problem that the fire-resistant power cable is difficult to prevent fire caused by high temperature inside the cable due to low smoke zero halogen flame retardance.
The utility model provides the following technical scheme: a fire-resistant power cable comprises a plurality of single wire cores, wherein shielding layers, armor layers, fire-resistant isolation layers, flame-retardant halogen-free composite belts and protective layers are sequentially wrapped on the outer sides of the single wire cores;
wherein, the outside of the single wire core is wrapped with an insulating layer;
wherein polypropylene tapes are filled between the plurality of single wire cores and the shielding layer;
the central position of the three single wire cores is provided with a central column, the outer side wall of the central column is provided with three reinforcing rods in an annular array, and the end part, far away from the central column, of each reinforcing rod is fixedly connected with a pressure resistant plate.
As the preference of above-mentioned technical scheme, the compressive plate is the arc structure, the inside wall and the single line core surface laminating of compressive plate.
As the preference of above-mentioned technical scheme, the protection layer lateral wall is provided with supplementary fixed establishment, supplementary fixed establishment includes solid fixed ring and lower solid fixed ring, go up gu fixed ring's tip fixedly connected with and go up the diaphragm, go up the screw hole on the diaphragm, gu fixed ring's tip fixedly connected with down the diaphragm down, down the screw hole has been seted up on the diaphragm, go up screw hole and lower screw hole interpolation and be equipped with the locating pin.
As the optimization of the technical scheme, the upper fixing ring and the lower fixing ring are of arc structures, and the inner walls of the upper fixing ring and the lower fixing ring are attached to the inner wall of the protective layer.
Preferably, the central column has a cylindrical structure.
As the optimization of the technical scheme, the insulating layer is ethylene propylene rubber, the shielding layer is a semiconductor paper tape, the armor layer is formed by weaving fine steel wires, and the shielding layer is a silicon rubber sheath.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the fireproof isolation layer is made of a fireproof insulating material, the flame-retardant halogen-free composite belt can improve the overall fire resistance, when a cable is in high-temperature fire or an external fire invades the device, the fireproof isolation layer and the flame-retardant halogen-free composite belt can respectively block fire from spreading, the tensile and dragging resistance and the tear resistance of the cable are enhanced through the arranged compression-resistant plate, the pressure born by the compression-resistant plate is led into the central column through the reinforcing rod for digestion, the central column is made of silicon rubber, and the high-pressure cable can be well buffered when the compression-resistant plate is subjected to pressure, and can be used for well unloading the larger pressure.
Drawings
FIG. 1 is a schematic perspective view of a fire-resistant power cable;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic elevational cross-sectional view of a fire resistant power cable;
fig. 4 is a schematic diagram of a split structure of the upper and lower fixing rings.
In the figure: 10. a single wire core; 11. a shielding layer; 12. an armor layer; 13. a refractory barrier layer; 14. flame retardant halogen-free composite tape; 15. a protective layer; 16. an insulating layer; 17. a polypropylene tape; 18. a center column; 19. a reinforcing rod; 20. a pressure resistant plate; 30. an upper fixing ring; 31. a lower fixing ring; 32. an upper cross plate; 321. an upper threaded hole; 33. a lower cross plate; 331. a lower threaded hole; 34. and (5) positioning pins.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1
As shown in fig. 1-4, the present utility model provides a technical solution: a fire-resistant power cable comprises a plurality of single wire cores 10, wherein shielding layers 11, armor layers 12, fire-resistant isolation layers 13, flame-retardant halogen-free composite belts 14 and protective layers 15 are sequentially wrapped on the outer sides of the plurality of single wire cores 10.
It should be noted that, the fire-resistant isolation layer 13 is a fire-resistant insulating material, the fire-resistant halogen-free composite belt 14 can improve the overall fire resistance, and when the cable is in a high-temperature fire or an external fire invades the device, the fire-resistant isolation layer 13 and the fire-resistant halogen-free composite belt 14 can respectively block the fire from spreading.
Wherein, the outside of the single wire core 10 is wrapped with an insulating layer 16; it is ensured that the transmitted current or electromagnetic waves or light waves travel only along the wire and do not flow to the outside.
Wherein, polypropylene tapes 17 are filled between the plurality of single wire cores 10 and the shielding layer 11; in order to ensure that the cable has stable structure and internal calculus, the polypropylene belt 17 material has no hygroscopicity, is not easy to shrink and is not corroded.
Wherein, the center department of three single sinle silk 10 is provided with center post 18, annular array is provided with three stiffener 19 on the center post 18 lateral wall, the tip fixedly connected with compressive plate 20 of center post 18 is kept away from to the stiffener 19, tensile drag ability and tear resistance of cable have been strengthened through the compressive plate 20 that sets up, and the pressure that this compressive plate 20 bore all is led into in the center post 18 through stiffener 19 and is digested, this center post 18 is made for silicone rubber, can be good buffering when compressive plate 20 receives the pressure, can carry out good unloading effect to great pressure.
As an implementation manner in this embodiment, the compression-resistant plate 20 has an arc structure, and the inner side wall of the compression-resistant plate 20 is attached to the outer surface of the single-wire core 10. So that the pressure applied by the single wire core 10 can be completely transferred to the pressure-resistant plate 20, and the force is buffered and unloaded through the cooperation among the pressure-resistant plate 20, the reinforcing rod 19 and the central column 18.
As one implementation in this embodiment, the center post 18 is of cylindrical configuration. So that each face of the center pillar 18 can receive the pressing force of the pressing resistant plate 20.
It should be noted that, the insulating layer 16 is ethylene propylene rubber, and the insulating layer 16 is ethylene propylene rubber, so that it can be ensured that the transmitted current, electromagnetic wave and optical wave only travel along the wire and do not flow to the outside, and the electric potential (i.e. the electric potential difference and the voltage formed on the surrounding objects) on the single wire core 10 can be isolated, so that the normal transmission function of the wire is ensured, and the safety of the external objects and the human body is ensured. The shielding layer 11 is made of semiconductor paper tape, and the armor layer 12 is made of fine steel wires by braiding, so that the tensile property of the cable is greatly improved. The protective layer 15 is a silicone rubber sheath.
The plurality of single cores 10 are coaxial with the cable, and the distances from the axis of the plurality of single cores 10 to the axis of the cable are equal.
Example 2
As shown in fig. 3-4, based on the same concept as that of the above embodiment 1, this embodiment further provides a fire-resistant power cable, an auxiliary fixing mechanism is disposed on the outer side wall of the protective layer 15, the auxiliary fixing mechanism includes an upper fixing ring 30 and a lower fixing ring 31, the end portion of the upper fixing ring 30 is fixedly connected with an upper transverse plate 32, an upper threaded hole 321 is formed on the upper transverse plate 32, the end portion of the lower fixing ring 31 is fixedly connected with a lower transverse plate 33, a lower threaded hole 331 is formed on the lower transverse plate 33, and positioning pins 34 are inserted into the upper threaded hole 321 and the lower threaded hole 331.
In the specific use, go on further fixed operation through the upper fixed ring 30 and the lower fixed ring 31 that set up to the both ends of cable, through the supplementary fixed establishment fixed cable junction that sets up for public end blind pipe and female end blind pipe butt joint are convenient, and cable connection is simple swift.
As an implementation manner in this embodiment, the upper fixing ring 30 and the lower fixing ring 31 are both arc structures, and the inner walls of the upper fixing ring 30 and the lower fixing ring 31 are attached to the inner wall of the protection layer 15, so that the two ends of the cable can be pressurized more tightly.
Working principle: the fire-resistant isolation layer 13 is a fire-resistant insulating material, the fire-resistant halogen-free composite belt 14 can improve the overall fire resistance, when a cable is subjected to high-temperature fire or an external fire invaded device, the fire-resistant isolation layer 13 and the fire-resistant halogen-free composite belt 14 can respectively block fire from spreading, the tensile dragging capacity and the tear resistance of the cable are enhanced through the arranged compression-resistant plate 20, the pressure born by the compression-resistant plate 20 is led into the central column 18 through the reinforcing rod 19 for digestion, the central column 18 is made of silicon rubber, and the fire-resistant plate 20 can be well buffered when being subjected to pressure, so that the high pressure can be well unloaded.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting.
Claims (6)
1. A fire resistant power cable comprising a plurality of single cores (10), characterized in that: the outer sides of the plurality of single wire cores (10) are sequentially wrapped with a shielding layer (11), an armor layer (12), a fireproof isolation layer (13), a flame-retardant halogen-free composite belt (14) and a protective layer (15);
wherein, the outside of the single wire core (10) is wrapped with an insulating layer (16);
wherein polypropylene tapes (17) are filled between the plurality of single wire cores (10) and the shielding layer (11);
the cable comprises a cable body and is characterized in that a central column (18) is arranged at the center of each single cable core (10), three reinforcing rods (19) are arranged on the outer side wall of each central column (18) in an annular array, and compression plates (20) are fixedly connected to the end parts, far away from the central columns, of the reinforcing rods (19).
2. A fire resistant power cable according to claim 1, characterized in that: the compression-resistant plate (20) is of an arc-shaped structure, and the inner side wall of the compression-resistant plate (20) is attached to the outer surface of the single wire core (10).
3. A fire resistant power cable according to claim 1, characterized in that: the protection layer lateral wall is provided with supplementary fixed establishment, supplementary fixed establishment includes fixed ring (30) and lower fixed ring (31), the tip fixedly connected with of going up fixed ring (30) goes up diaphragm (32), go up screw hole (321) have been seted up on diaphragm (32), the tip fixedly connected with of fixed ring (31) down diaphragm (33), lower screw hole (331) have been seted up on diaphragm (33) down, go up screw hole (321) and lower screw hole (331) interpolation and be equipped with locating pin (34).
4. A fire resistant power cable according to claim 3, characterized in that: the upper fixing ring (30) and the lower fixing ring (31) are of arc structures, and the inner walls of the upper fixing ring (30) and the lower fixing ring (31) are attached to the inner wall of the protective layer.
5. A fire resistant power cable according to claim 1, characterized in that: the center post (18) is of cylindrical configuration.
6. A fire resistant power cable according to claim 1, characterized in that: the insulation layer (16) is ethylene propylene rubber, the shielding layer (11) is a semiconductor paper tape, the armor layer (12) is formed by weaving fine steel wires, and the protective layer (15) is a silicone rubber sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321643579.4U CN220420311U (en) | 2023-06-27 | 2023-06-27 | Fire-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321643579.4U CN220420311U (en) | 2023-06-27 | 2023-06-27 | Fire-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220420311U true CN220420311U (en) | 2024-01-30 |
Family
ID=89641539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321643579.4U Active CN220420311U (en) | 2023-06-27 | 2023-06-27 | Fire-resistant power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220420311U (en) |
-
2023
- 2023-06-27 CN CN202321643579.4U patent/CN220420311U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |