CN115036073B - Flame-retardant fire-resistant power cable - Google Patents
Flame-retardant fire-resistant power cable Download PDFInfo
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- CN115036073B CN115036073B CN202210618294.9A CN202210618294A CN115036073B CN 115036073 B CN115036073 B CN 115036073B CN 202210618294 A CN202210618294 A CN 202210618294A CN 115036073 B CN115036073 B CN 115036073B
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 149
- 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 title claims abstract description 122
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 28
- 239000000853 adhesive Substances 0.000 claims description 26
- 230000001070 adhesive effect Effects 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- 239000012466 permeate Substances 0.000 abstract description 9
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 239000012433 hydrogen halide Substances 0.000 description 2
- 229910000039 hydrogen halide Inorganic materials 0.000 description 2
- QOKYJGZIKILTCY-UHFFFAOYSA-J hydrogen phosphate;zirconium(4+) Chemical class [Zr+4].OP([O-])([O-])=O.OP([O-])([O-])=O QOKYJGZIKILTCY-UHFFFAOYSA-J 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 229910000166 zirconium phosphate Inorganic materials 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the technical field of cables, in particular to a flame-retardant and fire-resistant power cable, which comprises a fixed block, wherein a plurality of cable cores are arranged on the fixed block in an array manner, flame-retardant fillers are arranged between two adjacent cable cores, insulating layers are arranged on the outer sides of the cable cores, and elastic components are arranged on the outer sides of the insulating layers. When this cable receives the fire source to be burnt, the fire source will burn the wearing layer earlier and permeate to fire-retardant layer, set up through fire-retardant layer with fire source and cable separation, provide one stage protection for the cable, avoid the fire source to directly permeate to the cable core position and cause the problem of damage to the cable core, simultaneously through filling fire-retardant filler at the cable core surface, when the fire source breaks through fire-retardant layer and permeate to the cable core, carry out the protection of two stages to the fire source through fire-retardant filler, further improve the fire resistance of the device, carry out dual protection to the cable core.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a flame-retardant and fire-resistant power cable.
Background
The power supply has become an integral part of the world's economic rapid development, and wires and cables are used as carriers for the power supply throughout the industry. Because the high polymer insulating material used for the electric wires and cables belongs to inflammable materials, the electric wires and cables are often burnt by internal and external factors in the process of transmitting electric energy, and damage is caused to life and property. The method generally adopted is to add halide and metal oxide into the flame-retardant cable, and evaluate the flame-retardant cable from the flame-retardant perspective, wherein smoke and hydrogen halide gas generated by initial combustion are utilized to isolate the cable from air, so that the flame-retardant effect is achieved; however, since a large amount of smoke and hydrogen halide gas are released during combustion, visibility is low during fire, which brings great hindrance to safe evacuation and fire fighting of personnel, and more toxic gas is generated.
The Chinese patent of application number 201910512588.1 discloses a flame-retardant cable, which is prepared by compounding alkalized fly ash and modified zirconium hydrogen phosphate powder, wherein the flame-retardant cable is prepared by compounding a composite flame retardant with zirconium hydrogen phosphate as an auxiliary material, and the flame-retardant cable is lower in price, but the flame source and the cable cannot be thoroughly separated by the flame-retardant cable disclosed by the invention, and the cable can still be damaged after long-time combustion.
The existing flame-retardant cable cannot effectively separate a fire source from the cable, and if the flame-retardant cable is not used for manually extinguishing fire when burned for a long time on a flame-retardant layer of the cable, the cable can still be damaged.
Disclosure of Invention
The invention aims to provide a flame-retardant fire-resistant power cable, which solves the problems that the existing flame-retardant cable cannot effectively separate a fire source from the cable, and the cable can still be damaged if the cable does not perform artificial fire extinguishment when the flame-retardant layer of the cable burns.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the flame-retardant and fire-resistant power cable comprises a fixed block, wherein a plurality of cable cores are arranged on the fixed block in an array manner, flame-retardant fillers are arranged between two adjacent cable cores, insulating layers are arranged on the outer sides of the cable cores, and elastic components are arranged on the outer sides of the insulating layers;
the device comprises an insulating layer, an elastic component, a limiting ring, a protective gas, a plurality of convex blocks, a conical block, a flame-retardant layer, a wear-resistant layer and a wear-resistant layer, wherein the limiting ring is arranged on one side, close to the insulating layer, of the inner cavity of the elastic component, the limiting ring is attached to the outer side of the insulating layer, the inner cavity of the elastic component is filled with the protective gas, the elastic layer is arranged on one side, far from the limiting ring, of the elastic component, the elastic layer is provided with the plurality of convex blocks in an annular array, the conical block is arranged between the two convex blocks, the conical block is connected with the outer side of the elastic component, the flame-retardant layer is arranged on the outer side of the elastic component, and one side, far from the limiting ring, of the convex blocks is attached to the flame-retardant layer;
when the wear-resistant layer burns, the fire source is cut off through the flame-retardant layer, and the fire source is prevented from diffusing to the cable core;
when the fire source can not be extinguished for a long time, the flame-retardant layer transmits heat of the fire source to the inside of the elastic component through the protruding blocks, when the temperature inside the elastic component is higher than a preset value, gas inside the elastic component is heated to expand and extrude the elastic layer to expand the elastic layer, the conical block is pushed to move towards the flame-retardant layer, the flame-retardant layer is punctured, and the flame-retardant layer and the elastic component are separated and fall off through the expansion of the elastic layer, so that the fire source on the flame-retardant layer can not be transmitted to the elastic component.
The preparation method of the flame-retardant and fire-resistant power cable comprises the following steps:
s1, coating an adhesive on the surface of a fixed block, and then adhering the cable core to the fixed block through the adhesive;
s2, coating an adhesive on the part of the cable core, which is not contacted with the fixed block, uniformly coating the flame-retardant filler on the surface of the cable core through the adhesive, and polishing off the redundant part;
s3, sleeving the insulating sleeve on the outer side of the flame-retardant filler, and bonding through an adhesive;
s5, coating an adhesive on the outer side of the insulating sleeve, sleeving the elastic component on the outer side of the insulating sleeve, sleeving the flame-retardant layer on the outer side of the elastic component, and extruding the convex block to enable the elastic component to be attached to the insulating sleeve;
s6, sleeving the wear-resistant layer on the outer side of the flame-retardant layer and bonding the wear-resistant layer by using an adhesive to finish the preparation of the flame-retardant and flame-resistant power cable.
The invention also has the following beneficial effects:
1. according to the invention, through the arrangement of the flame-retardant layer and the filling flame retardant, when the cable is burnt by the flame source, the flame source burns the wear-resistant layer first and permeates into the flame-retardant layer, the flame source is separated from the cable through the arrangement of the flame-retardant layer, one-stage protection is provided for the cable, the problem that the cable core is damaged due to the fact that the flame source directly permeates into the cable core position is avoided, meanwhile, the flame-retardant filler is filled on the surface of the cable core, and when the flame source breaks through the flame-retardant layer and permeates into the cable core, the flame source is protected in two stages through the flame-retardant filler, so that the fire resistance of the device is further improved, and double protection is carried out on the cable core.
2. According to the invention, through the arrangement of the elastic component, when a fire source burns on the flame-retardant layer for a long time, the heat of the fire source is transferred to the inside of the elastic component through the convex blocks on the elastic component through the flame-retardant layer, and the inert gas in the elastic component is heated and expanded, and the flame source is prevented from continuously burning on the cable core by contacting the flame-retardant layer with the convex blocks and limiting the expansion of the elastic component, so that the conical block moves towards the flame-retardant layer, and when the conical block contacts with the flame-retardant layer and continues to move, the conical block breaks the integral structure of the flame-retardant layer from inside to decompose the flame-retardant layer, so that the limitation of the flame-retardant layer on the elastic component is relieved, and meanwhile, the flame-retardant layer is separated from the cable body by starting to expand the elastic layer on the elastic component through the expansion of the inert gas, so that the flame source is prevented from continuously burning on the cable core, and the cable core is effectively protected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the elastic assembly of the present invention;
FIG. 3 is a schematic view of the structure of the present invention at A;
FIG. 4 is a schematic diagram of the preparation process of the present invention.
In the figure: 1. a cable core; 2. a fixed block; 3. a flame retardant filler; 4. an insulating layer; 5. an elastic component; 501. a limiting ring; 502. a bump; 503. an elastic layer; 6. a flame retardant layer; 7. a conical block; 8. and a wear-resistant layer.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1-3, a flame-retardant and fire-resistant power cable comprises a fixed block 2, wherein a plurality of cable cores 1 are arranged on the fixed block 2 in an array manner, the cable cores 1 are formed by meshing a plurality of groups of copper wires, the fixed block 2 is connected with the cable cores 1 through an adhesive, and flame-retardant fillers 3 are arranged between two adjacent cable cores 1.
Firstly, the cable core 1 and the fixed block 2 are fixedly connected by applying an adhesive on the fixed block 2, so that the problem of poor cable contact caused by movement of the cable core 1 in the use process is prevented.
Secondly, when the cable is prepared, the cable core 1 is fixed through the fixing block 2, and when the flame-retardant filler 3 is required to be filled on the cable core 1, the cable core 1 is not extruded by the flame-retardant filler to have a deviation problem.
The fire-retardant filler 3 is thermosetting phenolic resin, and the thermosetting phenolic resin has the characteristics of stability, heat resistance, flame retardance and electric insulation, and the fire-retardant filler 3 uniformly covers in the insulating layer 4 and wraps the cable core 1, and the cable core 1 is wrapped through the fire-retardant filler 3 to protect the cable core 1, so that the cable is prevented from directly burning the cable core 1 under the condition of burning by a fire source, time is provided for fire fighters, and the cable core is prevented from being damaged.
The outside of a plurality of cable cores 1 is equipped with insulating layer 4, through set up insulating layer 4 in the cable core 1 outside and with insulating layer 4 intussuseption filling cable core 1 and fire-retardant filler 3 fix cable core 1, avoid cable core 1 to appear the problem of electric leakage when using through insulating layer 4's setting simultaneously.
The outside of the insulating layer 4 is provided with an elastic component 5, the outside of the elastic component 5 is provided with a flame-retardant layer 6, and the flame-retardant layer is prepared by putting polyethylene, composite flame-retardant powder, a cross-linking agent, an antioxidant, polyethylene wax and zinc stearate into a high-speed stirrer, putting into a screw extruder and extruding.
Firstly, through setting up elastic component 5 and flame retardant coating 6 on insulating layer 4, in the cable material combustion process, flame retardant powder can form charcoal layer and molten state material rapidly on polyethylene material surface, and isolated air hinders heat transfer, is showing the flame retardant efficiency that improves the cable material, provides one stage protection for the cable.
Secondly, when the fire source burns to break through the flame retardant layer 6 and burn to the insulating layer 4, the cable core 1 is protected in two stages through the flame retardant filler 3 arranged in the insulating layer 4, so that rescue time is striven for firefighters.
The fire-retardant layer 6 outside is equipped with wearing layer 8, bonds through the adhesive between wearing layer 8 and the fire-retardant layer 6, is equipped with the array on the wearing layer 8 and is equipped with a plurality of non-slip zones, prevents through cup jointing wearing layer 8 in fire-retardant layer 6 outside that fire-retardant layer 6 from wearing and tearing take place in the use, leads to fire-retardant layer 6 to break unable play effective fire-retardant effect, simultaneously through setting up the non-slip zone on wearing layer 8, improves the anti-skidding performance of the device, the installation of the cable of being convenient for.
To sum up, when this cable receives the fire source to be burnt, the fire source will burn wearing layer 8 earlier and permeate to fire-retardant layer 6, set up through fire-retardant layer 6 with the fire source and cable separation, provide one-stage protection for the cable, avoid the fire source to directly permeate to the cable core 1 position and cause the problem of damage to cable core 1, simultaneously through filling fire-retardant filler 3 at cable core 1 surface, when fire source break through fire-retardant layer 6 and permeate to cable core 1, carry out the protection of two stages to the fire source through fire-retardant filler 3, further improve the fire resistance of the device, carry out dual protection to cable core 1.
Example two
In actual use, the operator found that when the fire source was too large and burnt the cable, even though the double layer flame retardant by the flame retardant layer 6 and the flame retardant filler 3 was used, the fire source penetrated to the position of the cable core 1 and burnt the cable core 1 under the long-term combustion, so that the device described in embodiment one was modified according to the method described in this embodiment to further improve the flame retardant and fire resistance of the cable
The protection gas is the inert gas of a high temperature expansion in the elastic component 5, one side that the elastic component 5 inner chamber is close to insulating layer 4 is equipped with spacing ring 501, spacing ring 501 is laminated with insulating layer 4 outside, the elastic component 5 inner chamber is full of protection gas, one side that spacing ring 501 was kept away from to elastic component 5 is equipped with elastic layer 503, be annular array and be equipped with a plurality of lugs 502 on the elastic layer 503, be equipped with a toper piece 7 between two lugs 502, toper piece 7 is connected with elastic component 5 outside, elastic component 5 outside is equipped with fire-retardant layer 6, one side that spacing ring 501 was kept away from to lug 502 is laminated with fire-retardant layer 6.
The side that fire-retardant layer 6 and elastic component 5 contacted is the flexible layer, and the flexible layer comprises an oily clay, through setting up the flexible layer between fire-retardant layer and other resistant subassembly 5, when using the cable under normal atmospheric temperature, the flexible layer has certain flexibility and toughness, when the cable is buckled, will wrap up the toper piece 7 on the elastic component 5, prevents that toper piece 7 from stabbing fire-retardant layer 6 and making fire-retardant layer 6 lose fire-retardant effect in normal use.
When the outer side of the cable is burnt, the flexible layer absorbs heat and is changed from flexible to rigid, and at the moment, after the residual flexible layer of the conical block 7 is contacted, the flexible layer is punctured to separate the flame retardant layer 6 from the cable, so that a fire source is effectively isolated.
First, when the fire source is insufficient for combustion for a long time, the fire source is isolated from the cable core 1 by the arranged flame retardant layer 6, and a one-stage protection is provided for the cable core 1.
Secondly, when the fire source burns on the flame-retardant layer 6 for a long time, the heat of the fire source is transferred to the inside of the elastic component 5 through the bump 502 on the elastic component 5 by the flame-retardant layer 6, and the inert gas in the elastic component 5 is heated and expanded, in the process, the flame-retardant layer 6 contacts with the bump 502 and limits the expansion of the elastic component 5, at the moment, the inert gas in the elastic component 5 is heated and expanded to extrude the conical block 7, so that the conical block 7 moves towards the flame-retardant layer 6, when the conical block 7 contacts with the flame-retardant layer and continues to move, the conical block 7 breaks the integral structure of the flame-retardant layer 6 from inside to decompose the flame-retardant layer 6, the limitation of the flame-retardant layer 6 on the elastic component 5 is relieved, and simultaneously, the flame-retardant layer 6 is separated from the cable body by the expansion of the elastic layer 503 on the elastic component 5 of the inert gas, so that the flame-retardant layer 6 drives the fire source to be separated from the cable, and the flame source is prevented from continuously burning onto the cable core 1, and the cable core 1 is effectively protected.
And when the fire source is separated from the cable after the flame-retardant layer 6 is followed by the fire source, and a new fire source is attached to the cable, the new fire source burns the elastic assembly 5, and when the elastic assembly 5 is burnt by the fire source, inert gas filled in the elastic assembly 5 contacts with external fire sources to block the continuous burning of the fire source newly attached to the cable, so that the cable is protected.
Finally, after the elastic component 5 is burnt out, the device can still carry out final protection on the cable core 1 through the flame-retardant filler 3 wrapped around the cable core 1, thereby increasing the time for rescuing the cable by firefighters.
Example III
As shown in fig. 4, a method for preparing a flame-retardant and fire-resistant power cable comprises the following steps:
s1, coating an adhesive on the surface of the fixed block 2, and then adhering the cable core 1 to the fixed block 2 through the adhesive.
S2, coating an adhesive on the part of the cable core 1 which is not contacted with the fixed block 2, uniformly coating the flame-retardant filler 3 on the surface of the cable core 1 through the adhesive, and polishing off the redundant part.
And S3, sleeving the insulating sleeve 4 on the outer side of the flame-retardant filler 3, and bonding through an adhesive.
S4, coating adhesive on the outer side of the insulating sleeve 4, sleeving the elastic component 5 on the outer side of the insulating sleeve 4, sleeving the flame-retardant layer 6 on the outer side of the elastic component 5, and extruding the convex blocks 502 to enable the elastic component 5 to be attached to the insulating sleeve 4.
S5, sleeving the wear-resistant layer 8 on the outer side of the flame-retardant layer 6 and bonding the wear-resistant layer by using an adhesive to finish the preparation of the flame-retardant and flame-resistant power cable.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The flame-retardant and fire-resistant power cable comprises a fixed block, and is characterized in that a plurality of cable cores are arranged on the fixed block in an array manner, flame-retardant fillers are arranged between two adjacent cable cores, insulating layers are arranged on the outer sides of the cable cores, and elastic components are arranged on the outer sides of the insulating layers;
the device comprises an elastic component, wherein a limiting ring is arranged on one side, close to an insulating layer, of an inner cavity of the elastic component, the limiting ring is attached to the outer side of the insulating layer, the inner cavity of the elastic component is filled with protective gas, an elastic layer is arranged on one side, far away from the limiting ring, of the elastic component, a plurality of protruding blocks are arranged on the elastic layer in an annular array, a conical block is arranged between the two protruding blocks, the conical blocks are connected with the outer side of the elastic component, a flame-retardant layer is arranged on the outer side of the elastic component, one side, far away from the limiting ring, of the protruding blocks is attached to the flame-retardant layer, a wear-resistant layer is arranged on the outer side of the flame-retardant layer, and one side, in contact with the elastic component, of the flame-retardant layer is a flexible layer which consists of oily clay;
when the wear-resistant layer burns, the fire source is cut off through the flame-retardant layer, and the fire source is prevented from diffusing to the cable core;
when the fire source can not be extinguished for a long time, the flame-retardant layer transmits heat of the fire source to the inside of the elastic component through the protruding blocks, when the temperature inside the elastic component is higher than a preset value, gas inside the elastic component is heated to expand and extrude the elastic layer to expand the elastic layer, the conical block is pushed to move towards the flame-retardant layer, the flame-retardant layer is punctured, and the flame-retardant layer and the elastic component are separated and fall off through the expansion of the elastic layer, so that the fire source on the flame-retardant layer can not be transmitted to the elastic component.
2. The flame-retardant and fire-resistant power cable according to claim 1, wherein the cable core is formed by meshing a plurality of groups of copper wires, and the fixing block is connected with the cable core through an adhesive.
3. A flame retardant and fire resistant power cable according to claim 1, wherein the flame retardant filler is a thermosetting phenolic resin having stable, heat resistant, flame retardant, electrically insulating properties, the flame retardant filler being uniformly covered in the insulating layer and surrounding the cable core.
4. A flame retardant and fire resistant power cable according to claim 1, wherein the wear layer is provided with a plurality of anti-slip strips in an annular array.
5. A flame retardant and fire resistant power cable according to claim 1, wherein the protective gas in the elastomeric component is a high temperature expanding inert gas.
6. The flame-retardant and fire-resistant power cable according to claim 1, wherein the wear-resistant layer and the flame-retardant layer are bonded through an adhesive, and the flame-retardant layer is sleeved outside the elastic component.
7. The flame-retardant and fire-resistant power cable according to claim 1, wherein the flame-retardant layer is prepared by putting polyethylene, composite flame-retardant powder, a cross-linking agent, an antioxidant, polyethylene wax and zinc stearate into a high-speed stirrer, putting into a screw extruder and extruding.
8. A method for preparing a flame-retardant and fire-resistant power cable for implementing a cable according to any one of claims 1 to 7, characterized in that it comprises the following steps:
s1, coating an adhesive on the surface of a fixed block, and then adhering the cable core to the fixed block through the adhesive;
s2, coating an adhesive on the part of the cable core, which is not contacted with the fixed block, uniformly coating the flame-retardant filler on the surface of the cable core through the adhesive, and polishing off the redundant part;
s3, sleeving the insulating layer on the outer side of the flame-retardant filler, and bonding through an adhesive;
s4, coating an adhesive on the outer side of the insulating layer, sleeving the elastic component on the outer side of the insulating layer, sleeving the flame-retardant layer on the outer side of the elastic component, and extruding the convex blocks to enable the elastic component to be attached to the insulating layer;
s5, sleeving the wear-resistant layer on the outer side of the flame-retardant layer and bonding the wear-resistant layer by using an adhesive to finish the preparation of the flame-retardant and flame-resistant power cable.
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| CN202210618294.9A CN115036073B (en) | 2022-06-01 | 2022-06-01 | Flame-retardant fire-resistant power cable |
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| CN115036073B true CN115036073B (en) | 2023-07-04 |
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| CN104751967B (en) * | 2013-12-25 | 2017-01-04 | 安徽联嘉祥特种电缆有限公司 | fire-resistant wire and cable and preparation method thereof |
| CN105070385B (en) * | 2015-09-09 | 2016-11-02 | 唐山师范学院 | A kind of Computer signal data cable with fire-proof function and preparation method thereof |
| CN215770650U (en) * | 2021-08-16 | 2022-02-08 | 扬州市中能电缆有限公司 | Environment-friendly high-flame-retardant fire-resistant special power cable |
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Address after: No.1 Jingwu Road, Linying County, Luohe City, Henan Province Patentee after: Hongfeng Cable Co.,Ltd. Address before: No.1 Jingwu Road, Linying County, Luohe City, Henan Province Patentee before: Hongfeng Cable Co.,Ltd. |
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