CN213183702U

CN213183702U - Flame-retardant cable

Info

Publication number: CN213183702U
Application number: CN202022031639.XU
Authority: CN
Inventors: 张欢欢; 刘行山
Original assignee: Tianjin Mitun Technology Co ltd
Current assignee: Tianjin Mitun Technology Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-05-11
Anticipated expiration: 2030-09-16

Abstract

The utility model provides a fire-retardant type cable belongs to the cable field. The flame-retardant cable comprises a copper conductor, a wrapping tape and a protective structure. The bag belt is internally provided with fillers. The outer surface of the metal tape armor is provided with an outer sheath, flame-retardant holes are formed in the surface of the fire barrier layer at equal intervals, flame-retardant liquid is filled in the flame-retardant holes, and the fire barrier layer is arranged between the inner sheath and the metal tape armor; through under the insulating barrier layer effect that sets up on copper conductor surface, add the flame retardant layer in its outside, the flame retardant liquid of the fire-retardant hole storage that flame retardant layer surface was seted up overflows when inlayer or skin burn out, cover on the surface, play fire-retardant effect of putting out a fire, reduce the possibility that copper conductor short circuit leads to the inside conductor burning to cause the intensity of a fire to stretch, the fire behaviour that reaches under withstand voltage condition, the oversheath effectively prevents that too much receiving climate influence makes the cable destroy in the use of cable, the life of extension cable.

Description

Flame-retardant cable

Technical Field

The utility model relates to a cable field particularly, relates to a fire-retardant type cable.

Background

At present, a wire cable is a wire product for transmitting electric energy and electric signals and realizing electromagnetic energy conversion, the cable generally consists of a cable core for transmitting electric power or electric signals and a sheath for protecting and insulating, the cable which only comprises one cable core and has a thinner diameter is generally called as a wire, some wires are not provided with an insulating sheath and are called as bare wires, the cable core in the cable is made of a metal material with good electrical conductivity, and copper (good electrical conductivity) or aluminum (low cost) is generally used;

the cable is easy to burn when meeting high temperature, but the traditional cable is lack of a flame-retardant structure inside, and once the internal lead is short-circuited and burnt, the fire can spread.

SUMMERY OF THE UTILITY MODEL

In order to compensate the above deficiency, the utility model provides a fire-retardant cable aims at improving the cable short circuit or the easy burning when meetting high temperature, causes the problem that the intensity of a fire spreads.

The utility model discloses a realize like this:

the utility model provides a pair of fire-retardant type cable, including copper conductor, band and protective structure.

The outer surface of the copper conductor is provided with an insulating shielding layer, and the number of the copper conductors is multiple; the wrapping tape wraps the outer surfaces of the plurality of copper conductors, fillers are arranged in the wrapping tape, and the fillers are arranged in gaps formed among the plurality of copper conductors.

The protective structure comprises an inner sheath, a fire blocking layer and a metal belt armor, the inner sheath is arranged on the outer surface of the belt, the metal belt armor is arranged on the outer surface of the inner sheath, the outer surface of the metal belt armor is provided with an outer sheath, flame-retardant holes are formed in the surface of the fire blocking layer at equal intervals, flame-retardant liquid is filled in the flame-retardant holes, and the fire blocking layer is arranged between the inner sheath and the metal belt armor.

In an embodiment of the present invention, a crosslinked polyethylene insulating layer is disposed between the insulating shielding layer and the copper conductor.

In an embodiment of the present invention, the copper conductor is provided with at least three, the copper conductor is arranged in a ring shape, and the copper conductor is formed by twisting a plurality of copper bars.

The utility model discloses an in the embodiment, the insulation shielding layer includes conductor shield layer and insulating layer, the insulating layer sets up conductor shield layer surface, conductor shield layer set up wrap up in the copper conductor surface.

In an embodiment of the present invention, the conductor shielding layer and the insulating layer are co-extruded and continuously vulcanized.

In an embodiment of the present invention, the conductor shielding layer is a wrapped shielding layer, the outer surface of the insulating layer is provided with a metal shielding layer, and the surface of the copper conductor is provided with a conductive graphite layer.

In an embodiment of the utility model, the belting is the steel band back-fire relief layer, the filler is inorganic mineral filling piece, inorganic mineral filling piece is insulating material.

The utility model discloses an in one embodiment, the band with be provided with the heat-conducting layer between the inner sheath, the heater strip is equipped with in the heat-conducting layer, the heater strip sets up along copper conductor length direction.

In an embodiment of the present invention, the inner sheath and the outer sheath are polyolefin isolation layers, and the metal tape armor is a non-magnetic metal tape armor.

In an embodiment of the present invention, the non-magnetic metal tape armor is a steel tape armor or a thin steel wire armor, the volume resistivity of the heat conductive layer is not less than 5 × 1104 Ω · m, the thickness of the heat conductive layer is 0.15mm to 0.21mm, and the heat conductive layer is a silica gel cushion layer.

The utility model has the advantages that: the utility model discloses a fire-retardant type cable that above-mentioned design obtained, during the use, through under the insulation shielding layer effect that sets up on copper conductor surface, add the fire blocking layer in its outside, the fire-retardant liquid of the fire-retardant hole storage that fire blocking layer surface was seted up overflows when inlayer or skin burn out, cover on the surface, play fire-retardant effect of putting out a fire, it leads to the inside conductor burning to cause the possibility that the intensity of a fire stretchs to reduce the copper conductor short circuit, the flame retardant property that reaches under withstand voltage condition, the oversheath effectively prevents that too much receiving the weather influence makes the cable destroy in the use, the life of extension cable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a protective structure provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of an insulation shielding layer according to an embodiment of the present invention;

fig. 3 is a schematic view of a strap structure provided in an embodiment of the present invention;

fig. 4 is a schematic structural view of a fire barrier according to an embodiment of the present invention.

In the figure: 100. a copper conductor; 110. an insulating shield layer; 111. a conductor shield layer; 113. an insulating layer; 115. a metal shielding layer; 130. a crosslinked polyethylene insulating layer; 300. wrapping belts; 310. A filler; 330. a heat conductive layer; 331. heating wires; 500. a protective structure; 510. an inner sheath; 530. a fire barrier layer; 531. a flame-retardant hole; 550. metal tape armoring; 570. an outer sheath.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the utility model provides a. Embodiments, all other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: a flame retardant cable includes a copper conductor 100, a tape 300, and a protective structure 500.

The wrapping tape 300 is wrapped and fixed on the surface of the copper conductor 100 and used for isolating and fixing the plurality of copper conductors 100, and the protective structure 500 is used for resisting flame and preventing fire from spreading.

Referring to fig. 1-3, an insulation shielding layer 110 is disposed on an outer surface of the copper conductor 100, and a plurality of the copper conductors 100 are disposed; the wrapping tape 300 wraps the outer surfaces of the plurality of copper conductors 100, fillers 310 are arranged in the wrapping tape 300, and the fillers 310 are arranged in gaps formed among the plurality of copper conductors 100; in this embodiment, the tape 300 is a steel tape fire barrier, the filler 310 is an inorganic mineral filling block, and the inorganic mineral filling block is made of a mineral insulating material and can resist high temperature of more than one thousand degrees, so that the cable is safe inside and safe outside in the using process;

in this embodiment, a crosslinked polyethylene insulation layer 130 is disposed between the insulation shield layer 110 and the copper conductor 100.

It should be noted that at least three copper conductors 100 are arranged, the three copper conductors 100 are annularly arranged, and the copper conductor 100 is formed by twisting multiple copper bars, and has good bending characteristics.

In specific implementation, the insulation shielding layer 110 includes a conductor shielding layer 111 and an insulation layer 113, the insulation layer 113 is disposed on the outer surface of the conductor shielding layer 111, the conductor shielding layer 111 is disposed to wrap the outer surface of the copper conductor 100, and the insulation layer 113 is a polyperfluorinated ethylene propylene insulation layer.

In other embodiments, the conductor shielding layer 111 and the insulating screen 113 are formed by co-extrusion and continuous vulcanization, the insulating layer 113 is in a combined shielding structure form combining extruded shielding and braided metal or fiber, and a three-layer co-extrusion and continuous vulcanization method is completed at one time, so that the tightness of a shielding wire core structure and the reliability of the cable performance are ensured; the conductor shielding layer 111 is an extruded shielding layer, the outer surface of the insulating layer 113 is provided with a metal shielding layer 115, and the surface of the copper conductor 100 is provided with a conductive graphite layer.

Referring to fig. 1 and 4, the protective structure 500 includes an inner sheath 510, a fire barrier 530 and a metal tape armor 550, the inner sheath 510 is disposed on an outer surface of the wrapping tape 300, the metal tape armor 550 is disposed on an outer surface of the inner sheath 510, an outer sheath 570 is disposed on an outer surface of the metal tape armor 550, fire-retardant holes 531 are disposed on a surface of the fire barrier 530 at equal intervals, fire-retardant liquid is filled in the fire-retardant holes 531, and the fire barrier 530 is disposed between the inner sheath 510 and the metal tape armor 550.

In this embodiment, band 300 with be provided with heat-conducting layer 330 between the inner sheath 510, the embedded heater strip 331 that is equipped with of heat-conducting layer 330, heater strip 331 sets up along copper conductor 100 length direction, and inside is provided with heater strip 331, can heat and get rid of the outside snow of the cover body, has avoided because of freezing the damage that causes the cable conductor.

It should be noted that the inner sheath 510 and the outer sheath 570 are polyolefin isolation layers, the metal tape armor 550 is a non-magnetic metal tape armor, the non-magnetic metal tape armor is a steel tape armor or a thin steel wire armor, the volume resistivity of the heat conduction layer 330 is greater than or equal to 5 × 1014 Ω · m, the thickness of the heat conduction layer 330 is 0.15mm-0.21mm, and the heat conduction layer 330 is a silica gel cushion layer.

The flame-retardant cable has the working principle that: during the use, under the effect of insulation shield 110 through setting up on copper conductor 100 surface, add fire blocking layer 530 in its outside, the fire-retardant liquid that fire-retardant hole 531 storage that fire blocking layer 530 surface was seted up overflows when inlayer or skin burns out, cover on the surface, play fire-retardant effect of putting out a fire, reduce the possibility that copper conductor 100 short circuit leads to the burning of inner conductor to cause the intensity of a fire to spread, the fire behaviour that reaches under withstand voltage condition, oversheath 570 prevents effectively that the cable is too much in the use to receive the weather influence and makes the cable destroy, the adduction of metal strip armor 550 provides wear resistance, slow down the destruction to inner structure, inner sheath 510 cooperation band 300 is effectual to be kept apart the protection to copper conductor 100, the life of extension cable.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flame-retardant cable is characterized by comprising

The insulation shielding layer (110) is arranged on the outer surface of the copper conductor (100), and a plurality of copper conductors (100) are arranged;

the wrapping tape (300) wraps the outer surfaces of the copper conductors (100), fillers (310) are arranged in the wrapping tape (300), and the fillers (310) are arranged in gaps among the copper conductors (100);

protective structure (500), protective structure (500) includes inner sheath (510), keep off fire layer (530) and metal tape armor (550), inner sheath (510) set up band (300) surface, metal tape armor (550) set up inner sheath (510) surface, metal tape armor (550) surface is provided with oversheath (570), fire-retardant hole (531) have been seted up to fire-retardant layer (530) surface equidistant, fire-retardant hole (531) intussuseption is filled with fire-retardant liquid, fire-retardant layer (530) sets up inner sheath (510) with between the metal tape armor (550).

2. The flame retardant type cable according to claim 1, wherein a crosslinked polyethylene insulating layer (130) is provided between the insulating shield layer (110) and the copper conductor (100).

3. The flame retardant cable according to claim 1, wherein at least three copper conductors (100) are provided, the three copper conductors (100) are arranged in a ring shape, and the copper conductors (100) are formed by stranding a plurality of copper strips.

4. The flame retardant cable according to claim 1, wherein the insulation shielding layer (110) comprises a conductor shielding layer (111) and an insulation layer (113), the insulation layer (113) is arranged on the outer surface of the conductor shielding layer (111), and the conductor shielding layer (111) is arranged to wrap the outer surface of the copper conductor (100).

5. The flame-retardant cable according to claim 4, wherein the conductor shielding layer (111) and the insulating layer (113) are co-extruded and continuously vulcanized.

6. The flame-retardant cable according to claim 5, wherein the conductor shielding layer (111) is an extruded shielding layer, the insulating layer (113) is provided with a metal shielding layer (115) on the outer surface, and the copper conductor (100) is provided with a conductive graphite layer on the surface.

7. The flame retardant cable according to claim 1, wherein the tape (300) is a steel tape fire barrier, and the filler (310) is an inorganic mineral filler block, and the inorganic mineral filler block is an insulating material.

8. The flame retardant cable according to claim 1, wherein a heat conductive layer (330) is arranged between the tape (300) and the inner sheath (510), a heating wire (331) is embedded in the heat conductive layer (330), and the heating wire (331) is arranged along the length direction of the copper conductor (100).

9. The flame retarded cable according to claim 8 wherein said inner sheath (510) and said outer sheath (570) are polyolefin barrier layers and said metallic tape armor (550) is a non-magnetic metallic tape armor.

10. The flame retardant cable according to claim 9, wherein the non-magnetic metal tape armor is a steel tape armor or a thin steel wire armor, the volume resistivity of the heat conductive layer (330) is not less than 5 x 1014 Ω -m, the thickness of the heat conductive layer (330) is 0.15mm to 0.21mm, and the heat conductive layer (330) is a silica gel cushion.