CN220085707U - Flame-retardant fireproof railway digital signal cable - Google Patents
Flame-retardant fireproof railway digital signal cable Download PDFInfo
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- CN220085707U CN220085707U CN202321497012.0U CN202321497012U CN220085707U CN 220085707 U CN220085707 U CN 220085707U CN 202321497012 U CN202321497012 U CN 202321497012U CN 220085707 U CN220085707 U CN 220085707U
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- 239000012784 inorganic fiber Substances 0.000 claims description 5
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Abstract
The utility model discloses a flame-retardant fireproof railway digital signal cable which comprises a cable core and a protective layer arranged outside the cable core, wherein the cable core is formed by twisting a flame-retardant filling rope and a plurality of star twisted wires or twisted wires, and the protective layer comprises a stainless steel braided hose, an anti-corrosion coating, a flame-retardant coating, a braided heat-insulating layer, a metal shielding layer, an inner liner layer, a steel wire braided layer and an outer sheath which are sequentially arranged from inside to outside. The flame-retardant fireproof railway digital signal cable provided by the utility model has reasonable structural design, has excellent flame retardance, fireproof performance, dampproof performance, compression resistance, animal tooth biting prevention and other functions, and can greatly improve the tensile strength, compression resistance, cracking resistance, bending performance and mechanical strength of the cable by arranging the steel wire winding layer between the inner rubber tube and the outer rubber tube, thereby completely meeting the requirements of a high-speed railway on the cable.
Description
Technical Field
The utility model belongs to the technical field of cables, and particularly relates to a flame-retardant fireproof railway digital signal cable.
Background
At present, the flame-retardant railway digital signal cable is mainly made of low-smoke low-halogen or halogen-free low-smoke flame-retardant materials, and is mainly characterized in that all materials contain little or no halogen, and the smoke released during combustion is little. However, the flame-retardant railway digital signal cable has a certain flame-retardant function, but has poor fireproof performance, and basically all the fire is burnt into ashes once a fire disaster occurs, so that a circuit is short-circuited in a short time, and the generated toxic gas forms a great obstacle to the evacuation and escape of personnel and the safety performance of a train.
Disclosure of Invention
The utility model aims to solve the technical problems in the prior art and provides a flame-retardant fireproof railway digital signal cable.
In order to achieve the above purpose and achieve the above technical effects, the utility model adopts the following technical scheme:
the utility model provides a fire-retardant fire prevention formula railway digital signal cable, includes the cable core and sets up in the outside sheath of cable core, the cable core forms through fire-retardant filling rope and a plurality of star stranded conductor or pair stranded conductor transposition, the sheath includes stainless steel woven hose, anticorrosive coating, fire-retardant coating, braided heat insulating layer, metal shielding layer, inner liner, steel wire braid and the oversheath that from interior to outer setting gradually.
Further, the star stranded wires comprise a protection tube, four stranded insulating single wires with different colors arranged in the protection tube and flame-retardant mud filled in gaps of the protection tube.
Further, the twisted pair wire comprises a protection tube, two twisted insulating single wires with different colors arranged in the protection tube and flame-retardant mud filled in the gap of the protection tube.
Further, each insulating single wire comprises a stranded conductor, an inorganic refractory glass fiber belt, an insulating layer and a refractory layer, and the inorganic refractory glass fiber belt, the insulating layer and the refractory layer are sequentially arranged outside the stranded conductor from inside to outside.
Further, the insulating layer is of a skin-bubble-skin three-layer co-extrusion physical foaming structure.
Further, the refractory layer comprises a refractory inorganic fiber belt and alumina refractory fibers which are sequentially arranged from inside to outside.
Further, the protection pipe sequentially comprises a ceramic silicon rubber sheath, a steel tape armor layer, a steel wire armor layer and an oxygen isolation layer from inside to outside.
Further, the anti-corrosion coating is an epoxy paint layer.
Further, the metal shielding layer is an aluminum sheath layer, a comprehensive sheath layer or a copper shielding layer.
Further, the outer sheath comprises an inner rubber tube, a steel wire winding layer and an outer rubber tube which are sequentially arranged from inside to outside.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses a flame-retardant fireproof railway digital signal cable which comprises a cable core and a protective layer arranged outside the cable core, wherein the cable core is formed by twisting a flame-retardant filling rope and a plurality of star twisted wires or twisted wires, and the protective layer comprises a stainless steel braided hose, an anti-corrosion coating, a flame-retardant coating, a braided heat-insulating layer, a metal shielding layer, an inner liner layer, a steel wire braided layer and an outer sheath which are sequentially arranged from inside to outside. The cable has the advantages of reasonable structural design, excellent functions of flame retardance, fire resistance, moisture resistance, compression resistance, animal tooth biting prevention and the like, and meanwhile, the tensile strength, the compression resistance, the cracking resistance, the bending performance and the mechanical strength of the cable can be greatly improved by arranging the steel wire winding layer between the inner rubber tube and the outer rubber tube, so that the requirements of a high-speed railway on the cable are completely met.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
wherein: 1. an insulating single wire; 2. twisting the conductor; 3. an inorganic fire resistant fiberglass tape; 4. an insulating layer; 5. a refractory layer; 6. star twisted wire; 7. a protective tube; 8. flame retardant mud; 9. a flame retardant filler rope; 10. stainless steel braided hose; 11. an anti-corrosion coating; 12. a flame retardant coating; 13. braiding a heat insulation layer; 14. a metal shielding layer; 15. an inner liner layer; 16. a steel wire braiding layer; 17. an outer sheath.
Detailed Description
The present utility model is described in detail below so that advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and unambiguous the scope of the present utility model.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
As shown in fig. 1, the flame-retardant fireproof railway digital signal cable comprises a cable core and a protective layer arranged outside the cable core, wherein the cable core is formed by twisting a flame-retardant filling rope 9 and a plurality of star twisted wires 6 or twisted wires (star twisted wires 6 or twisted wires are selected to be used according to a cable core arrangement diagram of a TB/T3100 railway digital signal cable according to actual use requirements), and the protective layer sequentially comprises a stainless steel woven hose 10, an anti-corrosion coating 11, a flame-retardant coating 12, a woven heat-insulating layer 13, a metal shielding layer 14, an inner liner 15, a steel wire woven layer 16 and an outer sheath 17 from inside to outside.
As a specific embodiment, the star twisted wire 6 includes a protection tube 7, four twisted insulating single wires 1 of different colors disposed in the protection tube 7, and flame retardant mud 8 filled in the gaps of the protection tube 7. The twisted pair wire comprises a protection tube 7, two twisted insulating single wires 1 with different colors arranged in the protection tube 7 and flame retardant mud 8 filled in the gap of the protection tube 7. The protection tube 7 sequentially comprises a ceramic silicon rubber sheath, a steel tape armor layer, a steel wire armor layer and an oxygen isolation layer from inside to outside, so that an inner cable core can be effectively protected from damage, the compression resistance and impact resistance of the cable are enhanced, and the signal transmission of the cable is stable and reliable. In the utility model, the oxygen-isolating layer is made of aluminum hydroxide and magnesium hydroxide, so that when the cable is burnt by open fire, a large amount of water can be separated out from the oxygen-isolating layer to reduce the environmental temperature, and a non-melting and non-combustible alumina hard shell is formed to isolate the cable from the outside air, thereby achieving the purpose of self-extinguishing the cable.
As a more specific embodiment, each insulating element wire 1 includes a stranded conductor 2, an inorganic fire-resistant glass fiber ribbon 3, an insulating layer 4, and a fire-resistant layer 5, and the inorganic fire-resistant glass fiber ribbon 3, the insulating layer 4, and the fire-resistant layer 5 are sequentially disposed outside the stranded conductor 2 from inside to outside. The insulating layer 4 is preferably of a skin-bubble-skin three-layer co-extrusion physical foaming structure, so that the insulating resistance of the cable can be effectively improved, the transmission attenuation of the cable can be reduced, the working capacitance of the cable can be reduced, and the safety and reliability of the cable can be greatly improved; the refractory layer 5 comprises a refractory inorganic fiber belt and alumina refractory fibers, the refractory inorganic fiber belt is made of a woven material, the mica layer of the mica belt cannot fall off, alumina is used as a refractory material, the bending performance is excellent, the weight is light under the same length, the transportation and construction are convenient, the production process is simple, a large number of special expensive equipment is not needed to be added, the fire resistance and the flame retardance are excellent, and the cable safety performance is greatly enhanced.
As a specific implementation mode, the anti-corrosion coating 11 is an epoxy paint layer and is composed of epoxy resin, extender pigment and curing agent, and the anti-corrosion capability of the cable can be improved and the service life of the cable can be prolonged by arranging the anti-corrosion coating 11.
The flame-retardant coating 12 is prepared by adding styrene-acrylic emulsion, ammonium polyphosphate, starch, hexabromocyclododecane, dicyandiamide, ethyl dicyclophosphoric acid, methyl cyclohexyl phosphate, methyl dimethyl phosphate and water into an emulsifying device, stirring and mixing the materials for 30-40min at a stirring speed of 400-450r/min, has the characteristics of high fire resistance, high temperature resistance and the like, can effectively prevent the cable from further flame-retarding in a fire occasion, and improves the temperature resistance and the fire resistance of the cable.
The woven insulating layer 13 is woven by glass wool. The glass wool is a cotton-shaped material formed by fiberizing molten glass, and the chemical components belong to glass, are inorganic fibers, and have the advantages of good molding, small volume density, low heat conductivity, heat preservation, heat insulation, good sound absorption performance, corrosion resistance and stable chemical performance.
The metal shielding layer 14 is an aluminum sheath layer, a comprehensive sheath layer or a copper shielding layer, so that the cable has excellent shielding performance, and is not interfered by other external factors in the use process, thereby ensuring the stability of signal transmission, enabling the transmission signal not to be distorted or deformed and improving the safety and reliability of the cable.
The inner liner 15 is made of a ceramic silicone rubber sheath.
The outer sheath 17 comprises an inner rubber tube, a steel wire winding layer and an outer rubber tube which are sequentially arranged from inside to outside, wherein the inner rubber tube and the outer rubber tube are respectively made of ceramic silicon rubber sheaths, and the tensile strength, the compression resistance, the cracking resistance, the bending performance and the mechanical strength of the cable can be greatly improved by arranging the steel wire winding layer between the inner rubber tube and the outer rubber tube.
The preparation method of the flame-retardant fireproof railway digital signal cable comprises the following steps:
firstly, twisting a plurality of fine copper wires into a twisted conductor 2 by adopting a wire bundling process, sequentially coating an inorganic fire-resistant glass fiber belt 3, an insulating layer 4 and a fire-resistant layer 5 outside the twisted conductor 2, twisting two or four produced insulating single wires 1 with different colors according to requirements, coating flame-retardant mud 8 and a ceramic silicon rubber sheath outside the twisted single wires by adopting a filling extrusion molding process, coating a steel tape armor layer outside the ceramic silicon rubber sheath by adopting an armor process, coating a steel wire armor layer outside the steel tape armor layer by adopting an armor process, and coating an oxygen barrier layer outside the steel wire armor layer to finish the manufacture of stranded wires or star stranded wires 6;
the produced twisted pairs or star-shaped twisted wires 6 and the flame-retardant filling rope 9 are twisted together by a high-speed cabling machine to form a cable core according to requirements, and then the cable core is sequentially coated with a stainless steel braided hose 10, an anti-corrosion coating 11, a flame-retardant coating 12, a braided heat-insulating layer 13, a metal shielding layer 14, an inner liner 15, a steel wire braided layer 16 and an outer sheath 17.
In order to ensure that all electrical performance indexes of the cable are qualified, all wire groups in the cable core must keep the tension consistent in the production process, and the setting range of the stranding pitch of the cable is 35-55 times of the outer diameter of the cable core.
The cable has reasonable structural design, has excellent functions of flame retardance, fire resistance, moisture resistance, compression resistance, animal tooth bite resistance and the like, and completely meets the requirements of high-speed railways on the cable.
Parts or structures of the present utility model, which are not specifically described, may be existing technologies or existing products, and are not described herein.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.
Claims (10)
1. The utility model provides a fire-retardant fire prevention formula railway digital signal cable, its characterized in that includes the cable core and sets up in the outside sheath of cable core, the cable core is stranded through fire-retardant filling rope and a plurality of star stranded conductor or pair stranded conductor and is formed, the sheath includes stainless steel woven hose, anticorrosive coating, fire-retardant coating, braided insulating layer, metal shielding layer, inner liner, steel wire braid and the oversheath that from interior to exterior set gradually.
2. The flame-retardant and fireproof type railway digital signal cable according to claim 1, wherein the star-shaped stranded wires comprise a protective tube, four stranded insulating single wires with different colors arranged in the protective tube and flame-retardant mud filled in gaps of the protective tube.
3. The flame-retardant fireproof type railway digital signal cable according to claim 1, wherein the twisted pair wire comprises a protective tube, two twisted insulating single wires with different colors arranged in the protective tube, and flame-retardant mud filled in gaps of the protective tube.
4. A fire-retardant fire-resistant railway digital signal cable according to claim 2 or 3, wherein each of the insulating single wires comprises a stranded conductor, an inorganic fire-resistant glass fiber ribbon, an insulating layer and a fire-resistant layer, which are sequentially arranged outside the stranded conductor from inside to outside.
5. The flame-retardant and fireproof railway digital signal cable as claimed in claim 4, wherein the insulating layer is a skin-bubble-skin three-layer co-extrusion physical foaming structure.
6. The flame-retardant fireproof type railway digital signal cable of claim 4, wherein the fireproof layer comprises a fireproof inorganic fiber tape and an alumina fireproof fiber which are sequentially arranged from inside to outside.
7. A fire-retardant fire-proof railway digital signal cable according to claim 2 or 3, characterized in that the protective tube comprises, from inside to outside, a ceramic silicone rubber sheath, a steel tape armor layer, a steel wire armor layer and an oxygen barrier layer.
8. A fire retardant railway digital signal cable as set forth in claim 1, wherein the corrosion resistant coating is an epoxy paint layer.
9. The flame retardant and fire resistant railway digital signal cable of claim 1, wherein the metal shielding layer is an aluminum sheath layer, a composite sheath layer or a copper shielding layer.
10. The flame-retardant fireproof railway digital signal cable of claim 1, wherein the outer sheath comprises an inner rubber tube, a steel wire winding layer and an outer rubber tube which are sequentially arranged from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497012.0U CN220085707U (en) | 2023-06-13 | 2023-06-13 | Flame-retardant fireproof railway digital signal cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497012.0U CN220085707U (en) | 2023-06-13 | 2023-06-13 | Flame-retardant fireproof railway digital signal cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220085707U true CN220085707U (en) | 2023-11-24 |
Family
ID=88819298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321497012.0U Active CN220085707U (en) | 2023-06-13 | 2023-06-13 | Flame-retardant fireproof railway digital signal cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220085707U (en) |
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2023
- 2023-06-13 CN CN202321497012.0U patent/CN220085707U/en active Active
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