CN218730062U - Flame-retardant signal cable - Google Patents

Flame-retardant signal cable Download PDF

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Publication number
CN218730062U
CN218730062U CN202223013218.XU CN202223013218U CN218730062U CN 218730062 U CN218730062 U CN 218730062U CN 202223013218 U CN202223013218 U CN 202223013218U CN 218730062 U CN218730062 U CN 218730062U
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layer
conductor
flame
signal cable
retardant
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CN202223013218.XU
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欧东东
曹磊
殷杰
花鹏程
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Zhongtian Radio Frequency Cable Co ltd
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Zhongtian Radio Frequency Cable Co ltd
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    • 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

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Abstract

The utility model discloses a fire-retardant signal cable, it relates to communication transmission cable technical field, include: the four conductor units are uniformly distributed in the circumferential direction around the axis of the flame-retardant signal cable, and the adjacent conductor units are mutually abutted; the outer layer protection unit is arranged at the outer sides of the four conductor units in a wrapping mode; the lining layer is filled between the outer layer protection unit and the conductor unit; wherein, the outer protection unit includes that the first shielding layer covers in the layer with preventing fires, and the first shielding layer covers in the outside of establishing at four conductor unit, and the layer covers in the outside of establishing at first shielding layer in preventing fires to isolated external signal interference and combustion heat, the inner liner is formed with four filling spaces corresponding with conductor unit's outline, and four conductor unit set up respectively in four filling spaces, so that the relative position between four conductor unit is fixed. The utility model discloses a fire-retardant signal cable has good fire behaviour, and has good signal shielding performance.

Description

Flame-retardant signal cable
Technical Field
The utility model relates to a communication transmission cable technical field especially relates to a fire-retardant signal cable.
Background
The signal cable is suitable for the connection between related equipment and a control device in a railway signal system, can realize the transmission of system control information and electric energy of 1MHz analog signals, 2Mbit/s digital signals and rated voltage alternating current of 750V or direct current of 1100V and below, and can be used in railway electrification and non-electrification sections. The flame retardant property of the signal cable product is related to driving safety, and even if a fire disaster happens, other communication products cannot be ignited by droppings, at present, the high flame retardant product is mainly imported basically, and the products in the same row only meet the national standard flame retardant requirement, and the flame retardant property requirement of the product in a harsher use environment and the signal shielding property requirement of the product in a combustion environment are not fully considered.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fire-retardant signal cable with good fire behaviour, and have good signal shielding performance.
The above object of the present invention can be achieved by the following technical solutions:
the utility model provides a fire-retardant signal cable, include:
the four conductor units are uniformly distributed in the circumferential direction around the axis of the flame-retardant signal cable, and the adjacent conductor units are mutually abutted;
the outer layer protection unit is arranged at the outer sides of the four conductor units in a wrapping mode;
the inner liner is filled between the outer layer protection unit and the conductor unit;
wherein, outer protection unit includes first shielding layer and the interior sheath of fire prevention, first shielding layer is established four the outside of conductor unit, the sheath is established in the fire prevention the outside of first shielding layer to isolated external signal interference and burning heat, the inside lining layer be formed with four with the corresponding filling space of outline of conductor unit, four the conductor unit sets up respectively four in the filling space, so that four relative position between the conductor unit is fixed.
In a preferred embodiment, the conductor unit includes:
a conductor core made by twisting a plurality of wires in parallel;
the foamed insulating layer is filled in the conductor core;
the second shielding layer is arranged at the outer side of the foaming insulating layer in a wrapping mode so as to isolate signals among different conductor units;
wherein, the radial middle part of the foamed insulating layer is provided with a filling hole for filling the conductor core, and the distance between the axis of the filling hole and the axis of the foamed insulating layer is less than or equal to 5 percent of the radius of the foamed insulating layer.
In a preferred embodiment, the number of the wires making up the conductor core is seven, wherein six of the wires are evenly circumferentially distributed around the remaining one of the wires.
In a preferred embodiment, the cross-sectional area of the lead is 0.78mm 2 To 0.8mm 2 In the meantime.
In a preferred embodiment, the second shielding layer is formed by a copper tape extending along the surface of the foamed insulating layer in the length direction thereof.
In a preferred embodiment, the first shielding layer is made of silver-plated copper wires through cross weaving, and the area of pores formed among the silver-plated copper wires is less than or equal to 10% of the surface area of the first shielding layer.
In a preferred embodiment, the diameter of the silver-plated copper wire forming the first shielding layer is between 0.19mm and 0.21 mm.
In a preferred embodiment, the fireproof inner protection layer is wrapped outside the first shielding layer through extrusion molding.
In a preferred embodiment, the outer layer protection unit comprises a fire-resistant layer, the fire-resistant layer is arranged on the outer side of the inner fire-resistant protection layer, and the fire-resistant layer is formed by spirally wrapping a fire-resistant belt along the surface of the inner fire-resistant protection layer.
In a preferred embodiment, the outer protection unit further comprises a sheath layer, the sheath layer is arranged on the outer side of the fire-resistant layer in a wrapping mode through extrusion molding, and the sheath layer is arranged on the outer side of the fire-resistant layer in a wrapping mode.
The utility model has the characteristics and advantages that:
the embodiment of the utility model provides a flame retardant signal cable is provided with the interior sheath of first shielding layer and fire prevention outside a plurality of conductor unit, and wherein first shielding layer can effectively isolated external signal interference, and the sheath is then effectively isolated external burning heat in the fire prevention, prevents that flame from ablating conductor unit, prolongs conductor unit electric power and signal transmission's duration as far as possible. In addition, the fire-proof inner sheath layer can form a hard shell after burning, and the hard shell is not melted and does not drip in the fire environment, so that the time of flame spread burning to the conductor unit is further delayed, and the stable work of the whole fire-retardant signal cable in the case of fire is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows the overall structure schematic diagram of the flame-retardant signal cable of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, the present invention provides a flame-retardant signal cable, including: the four conductor units 1 are uniformly distributed in the circumferential direction around the axis of the flame-retardant signal cable, and the adjacent conductor units 1 are mutually abutted; the outer layer protection unit 2 is arranged outside the four conductor units 1 in a wrapping mode; the lining layer 3 is filled between the outer layer protection unit 2 and the conductor unit 1; wherein, outer protection unit 2 includes first shielding layer 21 and the interior sheath 22 of fire prevention, and first shielding layer 21 package is established in the outside of four conductor unit 1, and the sheath 22 package is established in the outside of first shielding layer 21 in the fire prevention to isolated external signal interference and burning heat, inner liner 3 is formed with four filling spaces corresponding with conductor unit 1's outline, and four conductor unit 1 set up respectively in four filling spaces, so that the relative position between four conductor unit 1 is fixed.
For further explanation of the flame-retardant signal cable according to the embodiment of the present invention, the following further explanation is provided for its specific structure, connection relationship, and size limitation, wherein:
in a preferred embodiment, the conductor unit 1 comprises: a conductor core 11 made by twisting a plurality of wires in parallel; a foamed insulating layer 12, the conductor core 11 being filled in the foamed insulating layer 12; a second shielding layer 13, which is wrapped outside the foamed insulating layer 12 to isolate signals between different conductor units 1; wherein, the radial middle part of the foamed insulating layer 12 is provided with a filling hole for filling the conductor core 11, and the distance between the axis of the filling hole and the axis of the foamed insulating layer 12 is less than or equal to 5% of the radius of the foamed insulating layer 12. Specifically, the foamed insulating layer 12 may be made of a foamed polypropylene material, so that the foamed insulating layer has good heat resistance, wear resistance and excellent mechanical properties, and facilitates the overall cable laying operation.
In a preferred embodiment, the number of wires forming the conductive core 11 is seven, with six wires being evenly circumferentially distributed around the remaining one.
In a preferred embodiment, the cross-sectional area of the wire is 0.78mm 2 To 0.8mm 2 In the meantime.
In a preferred embodiment, the second shielding layer 13 is formed by a copper tape extending along the surface of the foamed insulating layer 12 in the length direction thereof. Furthermore, the copper strips can also prevent the adhesion between the foaming insulating layer 12 and the lining layer 3, and the cable branching operation during later-stage wiring construction is facilitated.
In a preferred embodiment, the first shielding layer 21 is made of silver-plated copper wires by cross weaving, and the area of the aperture formed among the silver-plated copper wires is less than or equal to 10% of the surface area of the first shielding layer 21.
In a preferred embodiment, the diameter of the silver-plated copper wire forming the first shielding layer 21 is between 0.19mm and 0.21 mm.
In a preferred embodiment, the inner flame-retardant sheath 22 is extruded on the outside of the first screen 21. Specifically, the fireproof inner sheath 22 is made of a flame-retardant thermoplastic elastomer material, the flame-retardant thermoplastic elastomer material has the characteristics of good fireproof performance, flame retardance, low smoke, no toxicity, aging resistance and the like, a hard shell can be formed after the flame-retardant thermoplastic elastomer material is burnt, the hard shell is not melted and does not drip in a fire environment, the time of burning the flame to the cable core is delayed, and therefore the operation time of the line in the fire is guaranteed.
In a preferred embodiment, the outer layer protection unit 2 comprises a fire-resistant layer 23, the fire-resistant layer 23 is wrapped on the outer side of the inner fire-resistant protection layer 22, and the fire-resistant layer 23 is formed by spirally wrapping a fire-resistant belt along the surface of the inner fire-resistant protection layer 22. Specifically, the fireproof belt is made of a muscovite material, and the muscovite has excellent fireproof performance and can effectively protect the internal structure of the cable in case of fire.
In a preferred embodiment, the outer protection unit 2 further comprises a sheath layer 24, the sheath layer 24 is wrapped on the outer side of the fire-resistant layer 23, and the sheath layer 24 is wrapped on the outer side of the fire-resistant layer 23 by extrusion molding. Specifically, the sheath layer 24 is made of a CPR-grade high-flame-retardant sheath material, so that the low-smoke halogen-free effect is achieved, and meanwhile, the heat release meets the CPR grade B2Ca standard in the EU building industry.
Based on above structural description, the utility model discloses fire-retardant signal cable has following beneficial effect:
the embodiment of the utility model provides a flame retardant signal cable is provided with first shielding layer 21 and the interior sheath 22 of fire prevention outside a plurality of conductor unit 1, and wherein first shielding layer 21 can effectively isolated external signal interference, and the sheath 22 is then effectively isolated external burning heat in the fire prevention, prevents that flame from ablating conductor unit 1, prolongs 1 electric power of conductor unit and signal transmission's duration as far as possible. In addition, the fire-proof inner sheath 22 forms a hard shell after burning, and the hard shell is not melted and does not drip in the fire environment, so that the time for flame propagation to burn to the conductor unit 1 is further delayed, and the stable operation of the whole fire-retardant signal cable in the case of fire is ensured.
The above are merely exemplary embodiments of the present invention, and those skilled in the art can make various changes or modifications to the exemplary embodiments of the present invention according to the disclosure of the present application without departing from the spirit and scope of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Claims (10)

1. A flame retardant signal cable, comprising:
the four conductor units are uniformly distributed in the circumferential direction around the axis of the flame-retardant signal cable, and the adjacent conductor units are mutually abutted;
the outer layer protection unit is arranged at the outer sides of the four conductor units in a wrapping mode;
the inner liner is filled between the outer layer protection unit and the conductor unit;
wherein, outer protection unit includes the interior sheath of first shielding layer and fire prevention, first shielding layer is established four the outside of conductor unit, the sheath is established in the fire prevention the outside of first shielding layer to isolated external signal interference and burning heat, the inside lining layer be formed with four with the corresponding filling space of outline of conductor unit, four conductor unit sets up respectively four in the filling space, so that four relative position between the conductor unit is fixed.
2. The flame-retardant signal cable of claim 1, wherein the conductor unit comprises:
a conductor core made of a plurality of wires stranded in parallel;
the foamed insulating layer is filled in the conductor core;
the second shielding layer is arranged at the outer side of the foaming insulating layer in a wrapping mode so as to isolate signals among different conductor units;
wherein, the radial middle part of the foamed insulating layer is provided with a filling hole for filling the conductor core, and the distance between the axis of the filling hole and the axis of the foamed insulating layer is less than or equal to 5% of the radius of the foamed insulating layer.
3. The flame retardant signal cable of claim 2 wherein the number of conductors making up said conductor core is seven, with six of said conductors being evenly circumferentially distributed about the remaining one of said conductors.
4. The flame-retardant signal cable of claim 2, wherein the cross-sectional area of the conductor is 0.78mm 2 To 0.8mm 2 In between.
5. The flame retardant signal cable of claim 2 wherein the second shield layer is formed from copper tape extending lengthwise along the surface of the foamed insulation layer.
6. The flame-retardant signal cable of claim 1, wherein the first shielding layer is made of silver-plated copper wires by cross-weaving, and the area of the pores formed among the silver-plated copper wires is less than or equal to 10% of the surface area of the first shielding layer.
7. The flame retardant signal cable of claim 6 wherein the diameter of the silver coated copper wire from which the first shield layer is made is between 0.19mm and 0.21 mm.
8. The flame retardant signal cable of claim 1 wherein the flame retardant inner jacket is extrusion coated on the outside of the first shield layer.
9. The flame-retardant signal cable of claim 1, wherein the outer protection unit comprises a fire-resistant layer, the fire-resistant layer is wrapped outside the inner flame-resistant layer, and the fire-resistant layer is formed by spirally wrapping a fire-resistant tape along the surface of the inner flame-resistant layer.
10. The flame-retardant signal cable of claim 9, wherein the outer layer protection unit further comprises a sheath layer, the sheath layer is disposed on the outer side of the flame-retardant layer, and the sheath layer is disposed on the outer side of the flame-retardant layer by extrusion molding.
CN202223013218.XU 2022-11-11 2022-11-11 Flame-retardant signal cable Active CN218730062U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223013218.XU CN218730062U (en) 2022-11-11 2022-11-11 Flame-retardant signal cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223013218.XU CN218730062U (en) 2022-11-11 2022-11-11 Flame-retardant signal cable

Publications (1)

Publication Number Publication Date
CN218730062U true CN218730062U (en) 2023-03-24

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ID=85616629

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223013218.XU Active CN218730062U (en) 2022-11-11 2022-11-11 Flame-retardant signal cable

Country Status (1)

Country Link
CN (1) CN218730062U (en)

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