CN116978622B - Medium-voltage environment-friendly flame-retardant fireproof cable - Google Patents
Medium-voltage environment-friendly flame-retardant fireproof cable Download PDFInfo
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- CN116978622B CN116978622B CN202311073570.9A CN202311073570A CN116978622B CN 116978622 B CN116978622 B CN 116978622B CN 202311073570 A CN202311073570 A CN 202311073570A CN 116978622 B CN116978622 B CN 116978622B
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- 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 59
- 239000003063 flame retardant Substances 0.000 title claims abstract description 58
- 239000004020 conductor Substances 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims description 85
- 238000002955 isolation Methods 0.000 claims description 66
- 230000000670 limiting effect Effects 0.000 claims description 59
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- 230000001681 protective effect Effects 0.000 claims description 29
- 238000011049 filling Methods 0.000 claims description 22
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 14
- 230000002441 reversible effect Effects 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 11
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- 238000002844 melting Methods 0.000 claims description 6
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- 238000009413 insulation Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims 1
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- 230000002829 reductive effect Effects 0.000 description 11
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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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- 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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
-
- 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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
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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
-
- 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
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
-
- 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
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/16—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for repairing insulation or armouring of 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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- Installation Of Indoor Wiring (AREA)
Abstract
The invention discloses a medium-voltage environment-friendly flame-retardant fireproof cable, which relates to the technical field of fireproof cables and comprises an inner conductor, wherein three inner conductors are arranged, the outer sides of the three inner conductors are respectively coated with an insulating inner layer, the outer sides of the insulating inner layers are jointly coated with an insulating outer layer, the outer sides of the insulating outer layers are coated with an isolating outer layer, the outer sides of the isolating outer layers are provided with connecting rubber sleeves, isolating strips are correspondingly bonded in the middle of the outer sides of the connecting rubber sleeves at equal intervals, and flame-retardant strips are bonded between the two isolating strips.
Description
Technical Field
The invention relates to the technical field of fireproof cables, in particular to a medium-voltage environment-friendly flame-retardant fireproof cable.
Background
The cable is an electric energy or signal transmission device, and is usually composed of several wires or groups of wires, wherein the cable comprises a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like, and the cable is composed of single-strand or multi-strand wires and an insulating layer and is used for connecting circuits, electric appliances and the like;
however, the current fireproof cable lacks corresponding auxiliary flame-retardant structures in the use process, so that flame can spread along the outer side of the cable to two ends of the cable after the cable is on a local fire, and further the phenomenon that the cable is damaged in a large area in a fire disaster is caused, the overall protective performance of the cable is reduced, and the service life of the cable is shortened.
Disclosure of Invention
The invention provides a medium-voltage environment-friendly flame-retardant fireproof cable, which can effectively solve the problems that the flame can spread along the outer side of the cable to two ends of the cable after the cable is locally on fire due to the lack of a corresponding auxiliary flame-retardant structure in the use process of the fireproof cable in the background technology, so that the cable is damaged in a large area in a fire disaster, the overall protective performance of the cable is reduced, and the service life of the cable is shortened.
In order to achieve the above purpose, the present invention provides the following technical solutions: the medium-voltage environment-friendly flame-retardant fireproof cable comprises an inner conductor, wherein three inner conductors are arranged, the outer sides of the three inner conductors are respectively coated with an insulating inner layer, the outer sides of the insulating inner layers are jointly coated with an insulating outer layer, and the outer sides of the insulating outer layers are coated with an isolating outer layer;
the outer side of the isolation outer layer is provided with a connecting rubber sleeve, isolation strips are correspondingly bonded at equal intervals in the middle of the outer side of the connecting rubber sleeve, and a flame-retardant strip is bonded between the two isolation strips;
the two ends of the outer side of the connecting rubber sleeve are adhered with mounting end strips, mounting side grooves are uniformly formed in one side edge of each mounting end strip along the circumferential direction at equal intervals, and the middle part of the inner side of each mounting side groove is connected with an elastic supporting piece;
the end part of the elastic supporting piece is fixedly connected with isolation swinging strips, and a flame-retardant isolation net is bonded at a gap between the isolation swinging strips;
the outside of the isolation strip is coated with a central coating strip, and the positions of the two ends of the central coating strip corresponding to the end parts of the isolation pendulum strip are coated with limiting hoops;
and a protective rubber sleeve is sleeved at the side surface of the limiting hoop corresponding to the outer side position of the isolation swinging strip.
According to the technical scheme, the flame-retardant strip is made of a non-combustible material, two sides of the flame-retardant strip are tightly attached to the side surfaces of the isolation strip, and the outer side of the flame-retardant strip is flush with the outer side of the isolation strip.
According to the technical scheme, the elastic supporting piece and the isolation pendulum bar are made of nonflammable materials, the elastic supporting piece can be elastically deformed, and the widths of the elastic supporting piece and the isolation pendulum bar are smaller than the width of the installation side groove.
According to the technical scheme, the flame-retardant isolation net is in a folded state in the storage process, and the thickness of the isolation swinging strip is smaller than that of the mounting end strip.
According to the technical scheme, the melting points of the central coating strip and the protective rubber sleeve are smaller than the melting point of the limiting hoop.
According to the technical scheme, the central mounting cables are inserted in the middle of the three inner conductors, the outer sides of the central mounting cables are uniformly and fixedly sleeved with the connecting triangular blocks at equal intervals, and the three lateral surfaces of the outer sides of the connecting triangular blocks are provided with mounting edge grooves;
the inner parts of the adjacent two side surfaces of the connecting triangular blocks are adhered with inner rubber storage bags, the middle parts of the side, close to the connecting triangular blocks, of the inner parts of the inner rubber storage bags are adhered with inner extrusion strips, the outer sides of the inner rubber storage bags are adhered with outer rubber storage bags, the middle parts of the side, close to the insulating outer layers, of the inner parts of the outer rubber storage bags are adhered with outer extrusion strips, two sides, corresponding to the outer extrusion strips, of the inner parts of the outer rubber storage bags are filled with filling net strips, and the positions, corresponding to the inner sides of the insulating outer layers, of the two sides of the outer rubber storage bags are penetrated with filling edge strips;
spacing inner circle has evenly been cup jointed to the outer equidistance of keeping apart, adjacent two equally spaced between the spacing inner circle has evenly glued the spacing silk of anti-cutting, spacing inner circle and the equal cladding in anti-cutting spacing silk outside have spacing endotheca, spacing outer lane has evenly been cup jointed in spacing endotheca outside equidistance, adjacent two equally spaced between the spacing outer lane has evenly interlude reinforcing wire, spacing outer lane and reinforcing wire outside cladding have spacing overcoat jointly, the clockwise spiral has been coiled in spacing overcoat outside, anticlockwise spiral has coiled in the clockwise spiral and has been bundled in the bundling outside, the tight cladding in bundling outside has the protection skin.
According to the technical scheme, the side surfaces of the inner rubber storage bag and the outer rubber storage bag are tightly and slidably attached to the outer side of the insulating inner layer, and the hardening agent is filled in the inner rubber storage bag;
the joint is crisscross each other to the internal bladder of storage and the outer bag contact department of storage, the inside book glue that fills of outer bag of storage, hardening agent and this glue can appear hardening after mixing, all connect through the connecting strip between the tip of the internal bladder of storage and the outer bag of storage.
According to the technical scheme, the extrusion inner strip and the extrusion outer strip are made of hard materials, the positions of the extrusion inner strip and the extrusion outer strip are mutually aligned, the extrusion inner strip and the extrusion outer strip can be mutually extruded to cut off the glue storage inner bag and the glue storage outer bag, dense filling holes are formed in the filling edge strip, and the hardening agent and the glue mixture can be smoothly flushed into the filling edge strip.
According to the technical scheme, the positions of the anti-cutting limiting wire and the reinforced metal wire are staggered, the middle parts of the limiting inner ring and the limiting outer ring are provided with the isolating grooves, and the anti-cutting limiting wire and the reinforced metal wire are cut off at the isolating grooves.
According to the technical scheme, the outer sides of the forward rotation binding strip and the reverse rotation binding strip are staggered, and the inner side of the protective outer layer is tightly filled in a gap between the forward rotation binding strip and the reverse rotation binding strip.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:
1. the external flame-retardant fireproof structure of the fireproof cable is optimized through the mutual coordination among the flame-retardant strips, the elastic supporting sheets, the isolation swinging strips, the flame-retardant isolation net and related components of the flame-retardant isolation net, the flame-retardant strips can be conveniently and rapidly arranged on the outer side of the fireproof cable, flame spreading along the outer side of the fireproof cable is simply intercepted directly through the flame-retardant strips, when the flame spreading along the outer side of the cable is spread to the side surface of the flame-retardant strips, the flame is naturally extinguished due to the lack of combustion conditions, the condition that the combustion occurs on the outer side of the protection cable is ensured to be restrained to a small range, the damage degree of the flame to the fireproof cable is further reduced, the cable can be directly cut off from the isolation strips for maintenance after the combustion, and the maintenance convenience of the fireproof cable is further improved;
meanwhile, when combustible materials are attached to the outer side of the fireproof cable and flame on the outer side of the cable is larger, heat generated by the flame on the outer side of the cable can heat and soften the limiting hoops and the protective rubber sleeve, so that the elastic supporting sheets and the isolation swinging strips are not restrained after the limiting hoops and the protective rubber sleeve are softened, and further, the flame on the outer side of the cable is intercepted by the fireproof barrier formed by the isolation swinging strips and the flame-retardant isolation net, the difficulty of the flame in cable diffusion is further increased, the interception intensity of the cable to open flame diffusion is improved, and the damage degree of the flame to the fireproof cable is further reduced and the service life of the fireproof cable is prolonged by restraining and intercepting the flame on the outer side of the fireproof cable.
2. The anti-cutting limiting wire and the reinforcing metal wire and related components thereof are matched with each other, so that multiple protection of the inside of the cable is realized, the anti-cutting limiting wire and the reinforcing metal wire are bound and restrained through the forward rotation binding strip and the reverse rotation binding strip, the installation tightness of the internal structure of the cable is effectively improved, the outside of the cable can be initially protected through the forward rotation binding strip and the reverse rotation binding strip, the damage of the cable caused by direct damage of slight cutting from the outside to an internal conductor and an insulating inner layer is effectively prevented, the protection performance of the cable is initially improved, the inside of the cable can be secondarily protected through the anti-cutting limiting wire and the reinforcing metal wire, and the protection performance of the inside of the cable is further improved;
and through the sectional type design of anti-cutting spacing silk and reinforcement wire, can intercept outside parallel cutting edge through the reinforcement wire to cut the interception through the rotation type cutting of anti-cutting spacing silk to outside, further improved the whole anti-cutting ability of cable, simultaneously because anti-cutting spacing silk and reinforcement wire are the linear structure of certain length, only need replace the maintenance in the cable outside to the anti-cutting spacing silk and the reinforcement wire of corresponding paragraph after the damage, and then when improving the whole protective properties of cable, reduced the whole cost of maintenance of cable.
3. The repair process of the cable after puncture injury is optimized through the mutual matching between the components in the inner rubber storage bag and the inner rubber storage bag, the flexible structural design of the inner rubber storage bag and the outer rubber storage bag ensures that the cable can elastically rebound after being slightly extruded by the outside, and the inner rubber storage bag and the outer rubber storage bag can also be handled through a synchronous scheme when being damaged differently, the cable breakage can be conveniently positioned by an maintainer through independent leakage, and the breakage can be quickly filled and repaired by the mixed rubber and hardener when the inner rubber storage bag and the outer rubber storage bag are severely punctured, so that the convenience of cable repair is effectively improved;
meanwhile, the filling edge strips can protect and guide the injury on the outer side of the insulating inner layer, so that the condition that the external puncture injury directly punctures the inside of the inner conductor is effectively avoided, the auxiliary protection of the inner conductor and the insulating inner layer is further realized, meanwhile, the design of the filling net strips inside the rubber storage outer bag is adopted, the overall toughness of the hardened mixed rubber is effectively improved, and the influence of extrusion damage on the overall structural strength of the cable is further reduced.
To sum up, through the inside disconnect-type of cable connect gum cover, cut-resistant spacing silk, strengthen the wire, store up interior bag of gum and store up outer bag structural design of gum, make the cable receive extrusion in the part, when puncture, cutting and fire burn the injury, the damage outside the cable is locally restricted to the independent auxiliary structure, and then effectually prevented that cable local damage from appearing the phenomenon of spreading on a large scale, the influence of local damage to cable wholeness in the cable use has been reduced, the axial isolation of cable has been improved, and when maintaining the cable, only need demolish alright quick replacement to the subassembly at the position of damage, and then effectually improved the convenience of cable maintenance.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of the reinforcement wire installation of the present invention;
FIG. 3 is a schematic view of the structure of the end face of the present invention;
FIG. 4 is a schematic view of the structure of the inside of the outer capsule of the present invention;
FIG. 5 is a schematic view of the structure of the spacing inner race installation of the present invention;
FIG. 6 is a schematic view of the structure of the isolation pendulum bar installation of the present invention;
FIG. 7 is a schematic view of the construction of the installation of the flame retardant insulation screen of the present invention;
reference numerals in the drawings: 1. an inner conductor; 2. an insulating inner layer; 3. an insulating outer layer; 4. an outer barrier layer; 5. a center mounting cable; 6. connecting triangular blocks; 7. installing an edge groove; 8. a glue storage inner bag; 9. extruding the inner strip; 10. an outer capsule for storing glue; 11. extruding the outer strip; 12. filling the net strips; 13. filling edge strips; 14. limiting the inner ring; 15. cutting-preventing limit wires; 16. a limiting inner sleeve; 17. a limiting outer ring; 18. reinforcing wires; 19. a limit coat; 20. positively rotating the binding strip; 21. a counter-rotating binding strip; 22. a protective outer layer; 23. connecting a rubber sleeve; 24. a spacer; 25. flame retardant strips; 26. installing an end strip; 27. mounting a side groove; 28. an elastic support sheet; 29. isolating the swinging strip; 30. a flame retardant barrier net; 31. a center cladding strip; 32. a limit hoop; 33. protective rubber sleeve.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Examples: as shown in fig. 1-7, the invention provides a technical scheme, namely a medium-voltage environment-friendly flame-retardant fireproof cable, which comprises an inner conductor 1, wherein three inner conductors 1 are arranged, the outer sides of the three inner conductors 1 are respectively coated with an insulating inner layer 2, the outer sides of the insulating inner layers 2 are jointly coated with an insulating outer layer 3, and the outer sides of the insulating outer layers 3 are coated with an isolating outer layer 4;
the middle parts of the three inner conductors 1 are penetrated with central mounting cables 5, the outer sides of the central mounting cables 5 are uniformly and fixedly sleeved with connecting triangular blocks 6 at equal intervals, the outer sides of the connecting triangular blocks 6 are provided with mounting edge grooves 7, the inner positions of the adjacent two connecting triangular blocks 6 corresponding to the mounting edge grooves 7 are adhered with inner rubber storage bags 8, the middle parts of one sides, close to the connecting triangular blocks 6, of the inner rubber storage bags 8 are adhered with outer rubber storage bags 10, the side surfaces of the inner rubber storage bags 8 and the outer rubber storage bags 10 are tightly and slidably attached to the outer sides of the insulating inner layers 2, hardening agents are filled in the inner rubber storage bags 8 and the outer rubber storage bags 10, the contact positions of the inner rubber storage bags 8 and the outer rubber storage bags 10 are mutually staggered and clamped, hardening occurs after the hardening agents are mixed with the inner rubber storage bags 10, and the end parts of the inner rubber storage bags 8 and the outer rubber storage bags 10 are connected through connecting strips;
the middle part of one side, close to the insulating outer layer 3, of the inside of the rubber storage outer bag 10 is adhered with an extrusion outer strip 11, two sides of the inside of the rubber storage outer bag 10, corresponding to the extrusion outer strip 11, are filled with filling net strips 12, two sides of the rubber storage outer bag 10, corresponding to the inner side position of the insulating outer layer 3, are inserted with filling side strips 13, the extrusion inner strip 9 and the extrusion outer strip 11 are made of hard materials, the extrusion inner strip 9 and the extrusion outer strip 11 are mutually aligned, the extrusion inner strip 9 and the extrusion outer strip 11 can cut off the rubber storage inner bag 8 and the rubber storage outer bag 10 after being mutually extruded, dense filling holes are formed in the filling side strips 13, a hardening agent and a glue mixture can be smoothly flushed into the inside of the filling side strips 13, the repairing process after the cables are subjected to puncture injury is optimized, the flexible rubber storage inner bag 8 and the rubber storage outer bag 10 are subjected to external slight extrusion, elastic rebound can be carried out through the rubber storage inner bag 8 and the rubber storage outer bag 10, in addition, the repairing scheme can be carried out by the soft rubber storage inner bag 8 and the cable can be rapidly carried out after the cables are subjected to the external slight extrusion, the repair damage can be carried out, the repairing process can be carried out by the soft rubber storage inner bag 8 and the cables and the cable can be rapidly carried out the soft repair by the repair process, and the repair cable is subjected to the damage by the soft rubber storage outer bag 10 through the soft rubber storage inner bag, and the repair cable is subjected to the special repair process, and the repair process can be subjected to the damage by the inner bag through the sealing and the inner bag through the sealing cable;
meanwhile, the filling edge strips 13 can protect and guide the injury on the outer side of the insulating inner layer 2, so that the condition that the injury caused by external puncture is directly punctured into the inner conductor 1 is effectively avoided, the auxiliary protection of the inner conductor 1 and the insulating inner layer 2 is further realized, meanwhile, the design of the filling net strips 12 in the rubber storage outer bag 10 effectively improves the overall toughness of the hardened mixed rubber, and the influence of extrusion damage on the overall structural strength of the cable is further reduced;
the outer side of the isolation outer layer 4 is uniformly sleeved with a limiting inner ring 14 at equal intervals, anti-cutting limiting wires 15 are uniformly adhered between two adjacent limiting inner rings 14 at equal intervals, limiting inner rings 14 and the outer sides of the anti-cutting limiting wires 15 are respectively coated with a limiting inner sleeve 16, the outer sides of the limiting inner sleeves 16 are uniformly sleeved with limiting outer rings 17 at equal intervals, reinforcing wires 18 are uniformly inserted between two adjacent limiting outer rings 17 at equal intervals, the positions of the anti-cutting limiting wires 15 and the reinforcing wires 18 are staggered with each other, isolating grooves are respectively formed in the middle parts of the limiting inner rings 14 and the limiting outer rings 17, and the anti-cutting limiting wires 15 and the reinforcing wires 18 are respectively cut off at the isolating grooves;
the limiting outer ring 17 and the outer side of the reinforcing wire 18 are jointly covered with the limiting outer sleeve 19, the outer side of the limiting outer sleeve 19 is spirally wound with a forward rotation binding strip 20 in the clockwise direction, the outer side of the forward rotation binding strip 20 is spirally wound with a reverse rotation binding strip 21 in the anticlockwise direction, the outer side of the reverse rotation binding strip 21 is tightly covered with a protective outer layer 22, the outer sides of the forward rotation binding strip 20 and the reverse rotation binding strip 21 are mutually staggered, the inner sides of the protective outer layers 22 are tightly filled in a gap between the forward rotation binding strip 20 and the reverse rotation binding strip 21, multiple protection of the cable is realized through the mutual matching between the anti-cutting limiting wire 15 and the reinforcing wire 18 and related components thereof, the anti-cutting limiting wire 15 and the reinforcing wire 18 are bound through the forward rotation binding strip 20 and the reverse rotation binding strip 21, so that the installation tightness of the cable internal structure is effectively improved, the cable outer sides can be preliminarily protected through the forward rotation binding strip 20 and the reverse rotation binding strip 21, further slight cutting from the outer sides is directly damaged to the inner conductor 1 and the insulating inner layer 2 to cause cable damage, the inner cable performance is improved, the secondary protection performance of the cable can be further improved, and the secondary protection performance of the cable can be further improved through the anti-cutting limiting wire 18, and the secondary protection performance of the cable can be further improved;
the external parallel cutting edges can be intercepted through the reinforced metal wires 18 by virtue of the sectional design of the anti-cutting limit wires 15 and the reinforced metal wires 18, and the external rotary cutting is blocked through the anti-cutting limit wires 15, so that the overall anti-cutting capacity of the cable is further improved, meanwhile, the anti-cutting limit wires 15 and the reinforced metal wires 18 are of linear structures with certain lengths, and after damage, the outer side of the cable can be maintained only by replacing the anti-cutting limit wires 15 and the reinforced metal wires 18 of corresponding sections, so that the overall protective performance of the cable is improved, and the overall maintenance cost of the cable is reduced;
the outer side of the protective outer layer 22 is equidistantly coated with a connecting rubber sleeve 23, isolation strips 24 are correspondingly bonded at equal intervals in the middle of the outer side of the connecting rubber sleeve 23, a flame-retardant strip 25 is bonded between the two isolation strips 24, the flame-retardant strip 25 is made of a non-combustible material, two sides of the flame-retardant strip 25 are tightly attached to the side surfaces of the isolation strips 24, and the outer sides of the flame-retardant strip 25 are mutually flush with the outer sides of the isolation strips 24;
the two ends of the outer side of the connecting rubber sleeve 23 are adhered with mounting end strips 26, one side edge of each mounting end strip 26 is uniformly provided with mounting side grooves 27 along the circumferential direction at equal intervals, the middle part of the inner side of each mounting side groove 27 is fixedly connected with an elastic supporting piece 28, the end parts of the elastic supporting pieces 28 are fixedly connected with isolation swinging strips 29, each elastic supporting piece 28 and each isolation swinging strip 29 are made of nonflammable materials, the elastic supporting pieces 28 can be elastically deformed, and the widths of the elastic supporting pieces 28 and the isolation swinging strips 29 are smaller than the width of each mounting side groove 27;
a flame-retardant isolation net 30 is adhered to the gaps between the isolation pendulum bars 29, the flame-retardant isolation net 30 is made of glass fiber mesh cloth, the flame-retardant isolation net 30 is in a folded state in the storage process, and the thickness of the isolation pendulum bars 29 is smaller than that of the mounting end bars 26;
the outside of the isolating bar 24 is coated with a central coating bar 31, the positions of the two ends of the central coating bar 31 corresponding to the end parts of the isolating pendulum bar 29 are coated with limiting hoops 32, the positions of the side surfaces of the limiting hoops 32 corresponding to the outside of the isolating pendulum bar 29 are sleeved with protective rubber sleeves 33, the limiting hoops 32 are made of hard plastics, the melting points of the central coating bar 31 and the protective rubber sleeves 33 are smaller than the melting point of the limiting hoops 32, the external flame-retardant and fireproof structure of the fireproof cable is optimized through the mutual matching among the flame-retardant bar 25, the elastic supporting sheet 28, the isolating pendulum bar 29, the flame-retardant isolating net 30 and related components thereof, the flame-retardant strip 25 can be conveniently and rapidly arranged on the outer side of the fireproof cable through the isolating strip 24, flame spreading along the outer side of the fireproof cable is simply intercepted directly through the flame-retardant strip 25, so that when the flame spreading along the outer side of the cable is spread to the side surface of the flame-retardant strip 25, the flame is naturally extinguished due to lack of combustion conditions, the outer side of the protective cable is ensured to be restrained to a small range when combustion occurs, the damage degree of the flame to the fireproof cable is further reduced, the cable can be directly cut off from the isolating strip 24 for maintenance when the cable is maintained after combustion, and the maintenance convenience of the fireproof cable is further improved;
meanwhile, when combustible substances are attached to the outer side of the fireproof cable and flame on the outer side of the cable is larger, heat generated by the flame on the outer side of the cable can heat and soften the limiting hoops 32 and the protective rubber sleeves 33, so that after the limiting hoops 32 and the protective rubber sleeves 33 are softened, the elastic support pieces 28 and the isolation swinging strips 29 are not restrained, and further, the flame on the outer side of the cable is intercepted by the fireproof barrier formed by the isolation swinging strips 29 and the flame-retardant isolation net 30, the difficulty of the flame on the cable diffusion is further increased, the interception intensity of the cable on open flame diffusion is improved, and the damage degree of the flame on the fireproof cable is further reduced by restraining and intercepting the flame on the outer side of the fireproof cable, so that the service life of the fireproof cable is prolonged.
The working principle and the using flow of the invention are as follows: in the practical application process, in the use process of the cable, the inner conductor 1 can be insulated and protected through the insulating inner layer 2, a plurality of inner conductors 1 are restrained through the insulating outer layer 3, the isolation strips 24 and components connected to the isolation strips 24 are arranged on the outer side of the cable through the connecting rubber sleeve 23, when a fire disaster on the outer side of the cable ignites the protective outer layer 22, and the flame axially spreads along the outer side of the cable, when the flame spreads to the end part of the protective rubber sleeve 33, the protective rubber sleeve 33 is softened and melted through the temperature of the flame, so that the restraint on the elastic support sheet 28 and the tail part of the isolation strips 29 is eliminated, when the flame continues to spread along the outer side of the protective rubber sleeve 33 to the limiting hoop 32, the flame continuously heats and softens the limiting hoop 32, and after the limiting hoop 32 is partially softened, the restraint on the end part of the isolation strips 29 is canceled, the isolation strips 29 are outwards spread under the elastic action of the elastic support sheet 28, and the flame-retardant isolation strips 30 are driven to stretch in the swinging and stretching process of the isolation strips 29, and the flame-retardant isolation strips 30 are further stretched on the outer side of the cable, so that the flame-retardant isolation strips 30 are formed on the outer side of the cable, and the flame-retardant barrier is prevented from spreading axially;
the middle part of the connecting rubber sleeve 23 is partitioned through the nonflammable flame-retardant strip 25, so that flame outside the cable is prevented from continuously diffusing along the outer side of the protective outer layer 22 after bypassing the corresponding flame-retardant isolation net 30, and the flame-blocking capacity of the cable is further improved;
when the fireproof cable is damaged by cutting from the outside, the anti-cutting limit wire 15 and the reinforcing wire 18 are installed on the outside of the isolation outer layer 4 through the limit inner ring 14 and the limit inner sleeve 16, so that two layers of independent protective nets are formed on the outside of the isolation outer layer 4 through the anti-cutting limit wire 15 and the reinforcing wire 18, and the outside of the anti-cutting limit wire 15 and the reinforcing wire 18 are bundled through the forward-rotation bundling strip 20 and the reverse-rotation bundling strip 21, so that the installation tightness degree of the anti-cutting limit wire 15 and the reinforcing wire 18 is improved, and the restraint cladding is carried out on the forward-rotation bundling strip 20 and the reverse-rotation bundling strip 21 through the protection outer layer 22, so that the internal structure tightness degree of the cable is further improved;
when the outer side of the cable is cut, the cutting damage can be primarily intercepted through the forward rotation binding strip 20 and the reverse rotation binding strip 21, when the outer side of the cable is cut in parallel, the cutting edge can be quickly blocked through the reinforcing metal wire 18, further, the parallel cutting edge is effectively prevented from going deep into the cable, when the cable is cut through the rotating edge, after the rotating edge passes through the limiting inner sleeve 16 and contacts with the cutting-preventing limiting wire 15, the rotating edge cannot cut off the cutting-preventing limiting wire 15 immediately because the cutting-preventing limiting wire 15 is soft and tough, two ends of the cutting-preventing limiting wire 15 are mutually separated from the corresponding limiting inner rings 14 under the driving of the rotating edge, and after the rotating edge draws the cutting-preventing limiting wire 15 out of the cable, the cutting-preventing limiting wire 15 can be directly wound at the rotating shaft position of the rotating edge, and an operator can warn through the cutting-preventing limiting wire 15, so that the protection performance of the cable is further improved;
when the cable is damaged by puncture or high-strength extrusion in the use process, the connecting triangular blocks 6 can be uniformly mounted at the center of the inner conductor 1 at equal intervals through the central mounting cable 5, the rubber storage inner bag 8 and the rubber storage outer bag 10 can be uniformly mounted at the side gap of the conductor 1 through the mounting edge groove 7, and when an external sharp object only penetrates the rubber storage outer bag 10, the rubber in the rubber storage outer bag 10 can leak outwards through the holes, so that an maintainer can conveniently and rapidly detect the damaged position for maintenance;
when outside sharp object pierces through the inner bag 8 of storage rubber and the outer bag 10 of storage rubber simultaneously, the inside hardener of inner bag 8 of storage rubber and outer bag 10 of storage rubber can mix and solidify fast with this glue each other, and then realized repairing fast to cable damage department, simultaneously when the cable receives high strength extrusion, the inside insulating inlayer 2 of cable and insulating skin 3 can appear the phenomenon of damage, can carry out mutual rigidity extrusion between extrusion inner bar 9 and the extrusion outer bar 11, and then can cut off the contact department of inner bag 8 of storage rubber and outer bag 10 of storage rubber through extrusion inner bar 9 and extrusion outer bar 11 extrusion, and then make the inside hardener of inner bag 8 of storage rubber and outer bag 10 of storage rubber and this glue can intensive mixing and harden, can carry out supplementary reinforcement to the repair glue after hardening through filling net strip 12 simultaneously, and then realized repairing the cable inside.
Finally, it should be noted that: the foregoing is merely a preferred example of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a fire-retardant fireproof cable of middling pressure environmental protection, includes inner conductor (1), and inner conductor (1) are provided with three, its characterized in that: the outer sides of the three inner conductors (1) are respectively coated with an insulating inner layer (2), the outer sides of the insulating inner layers (2) are jointly coated with an insulating outer layer (3), and the outer sides of the insulating outer layers (3) are coated with an isolating outer layer (4);
the outer side of the isolation outer layer (4) is provided with a connecting rubber sleeve (23), isolation strips (24) are correspondingly bonded at equal intervals in the middle of the outer side of the connecting rubber sleeve (23), and flame retardant strips (25) are bonded between the two isolation strips (24);
the two ends of the outer side of the connecting rubber sleeve (23) are adhered with mounting end strips (26), mounting side grooves (27) are uniformly formed in the side edge of one side of each mounting end strip (26) at equal intervals along the circumferential direction, and the middle part of the inner side of each mounting side groove (27) is connected with an elastic supporting sheet (28);
the end part of the elastic supporting piece (28) is fixedly connected with isolation swinging strips (29), and a flame-retardant isolation net (30) is adhered to a gap between the isolation swinging strips (29);
the outside of the isolation strip (24) is coated with a central coating strip (31), and the positions of the two ends of the central coating strip (31) corresponding to the end parts of the isolation pendulum strip (29) are coated with limiting hoops (32);
a protective rubber sleeve (33) is sleeved at the position of the side surface of the limiting hoop (32) corresponding to the outer side of the isolation swinging strip (29);
the middle parts of the three inner conductors (1) are penetrated with central mounting cables (5), the outer sides of the central mounting cables (5) are uniformly and fixedly sleeved with connecting triangular blocks (6) at equal intervals, and the three lateral surfaces of the outer sides of the connecting triangular blocks (6) are provided with mounting edge grooves (7);
the two adjacent side surfaces of the connecting triangular blocks (6) are adhered with inner rubber storage bags (8) corresponding to the inner positions of the mounting edge grooves (7), the middle parts of one side, close to the connecting triangular blocks (6), inside the inner rubber storage bags (8) are adhered with inner extrusion strips (9), the outer side of each inner rubber storage bag (8) is adhered with outer rubber storage bags (10), the middle parts of one side, close to the insulating outer layers (3), inside the outer rubber storage bags (10) are adhered with outer extrusion strips (11), two sides, corresponding to the outer extrusion strips (11), of each inner rubber storage bag (10) are filled with filling net strips (12), and filling edge strips (13) are inserted in the positions, corresponding to the inner sides of the insulating outer layers (3), of each outer rubber storage bag (10).
Spacing inner circle (14) have evenly been cup jointed to isolation skin (4) outside equidistance, and adjacent two equally spaced between spacing inner circle (14) has evenly glued and has prevented cutting spacing silk (15), spacing inner circle (14) and prevent cutting spacing silk (15) outside all cladding have spacing endotheca (16), spacing outer lane (17) have evenly been cup jointed to spacing endotheca (16) outside equidistance, adjacent two equally spaced between spacing outer lane (17) have evenly been alternated reinforcement wire (18), spacing outer lane (17) and reinforcement wire (18) outside cladding have spacing overcoat (19) jointly, spacing overcoat (19) outside has been spirally coiled forward bundle strip (20) along clockwise, forward bundle strip (20) outside has been spirally coiled backward bundle strip (21) along anticlockwise, the closely cladding has protective skin (22) in backward bundle strip (21) outside.
The side surfaces of the inner rubber storage bag (8) and the outer rubber storage bag (10) are tightly and slidably attached to the outer side of the insulating inner layer (2), and the hardening agent is filled in the inner rubber storage bag (8);
the contact parts of the inner rubber storage bag (8) and the outer rubber storage bag (10) are mutually staggered and clamped, the inner rubber storage bag (10) is filled with the hardening agent, the hardening agent and the hardening agent are mixed and then hardened, and the ends of the inner rubber storage bag (8) and the outer rubber storage bag (10) are connected through connecting strips;
the extrusion inner strip (9) and the extrusion outer strip (11) are made of hard materials, the positions of the extrusion inner strip (9) and the extrusion outer strip (11) are aligned with each other, after the extrusion inner strip (9) and the extrusion outer strip (11) are extruded with each other, the glue storage inner bag (8) and the glue storage outer bag (10) can be cut off, dense filling holes are formed in the filling edge strip (13), and the hardening agent and the glue mixture can be smoothly flushed into the filling edge strip (13).
2. The medium voltage environment-friendly type flame-retardant fireproof cable according to claim 1, wherein the flame-retardant strip (25) is made of a non-flammable material, two sides of the flame-retardant strip (25) are tightly attached to the side surfaces of the isolation strip (24), and the outer sides of the flame-retardant strip (25) are mutually flush with the outer sides of the isolation strip (24).
3. The medium voltage environment-friendly flame-retardant fireproof cable according to claim 1, wherein the elastic supporting piece (28) and the isolation swinging strip (29) are made of non-combustible materials, the elastic supporting piece (28) can be elastically deformed, and the widths of the elastic supporting piece (28) and the isolation swinging strip (29) are smaller than the widths of the installation side grooves (27).
4. A medium voltage environment friendly flame retardant fireproof cable according to claim 1, wherein the flame retardant insulation net (30) is in a folded state during storage, and the thickness of the insulation swinging strip (29) is smaller than the thickness of the mounting end strip (26).
5. The medium voltage environment-friendly type flame-retardant fireproof cable according to claim 1, wherein the melting points of the central wrapping strip (31) and the protective rubber sleeve (33) are smaller than the melting point of the limiting hoops (32).
6. The medium voltage environment-friendly flame-retardant fireproof cable according to claim 1, wherein the positions of the anti-cutting limiting wire (15) and the reinforcing wire (18) are staggered, the middle parts of the limiting inner ring (14) and the limiting outer ring (17) are provided with isolating grooves, and the anti-cutting limiting wire (15) and the reinforcing wire (18) are cut off at the isolating grooves.
7. The medium voltage environment-friendly type flame-retardant fireproof cable according to claim 1, wherein the outer sides of the forward rotation binding strips (20) and the reverse rotation binding strips (21) are staggered, and the inner sides of the protective outer layers (22) are tightly filled in gaps between the forward rotation binding strips (20) and the reverse rotation binding strips (21).
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| CN202311073570.9A CN116978622B (en) | 2023-08-24 | 2023-08-24 | Medium-voltage environment-friendly flame-retardant fireproof cable |
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| CN202311073570.9A CN116978622B (en) | 2023-08-24 | 2023-08-24 | Medium-voltage environment-friendly flame-retardant fireproof cable |
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| CN116978622B true CN116978622B (en) | 2023-12-26 |
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| CN116978622A (en) | 2023-10-31 |
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Inventor after: Wei Zhibing Inventor after: Duan Mingkuan Inventor after: Guo Chunlei Inventor after: Ning Xinjiang Inventor after: Jiang Xuquan Inventor after: Zhang Zihao Inventor before: Duan Mingkuan Inventor before: Guo Chunlei Inventor before: Ning Xinjiang Inventor before: Jiang Xuquan Inventor before: Zhang Zihao |