CN213752109U - Halogen-free low-smoke flame-retardant B1-grade power cable - Google Patents

Halogen-free low-smoke flame-retardant B1-grade power cable Download PDF

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CN213752109U
CN213752109U CN202023107194.5U CN202023107194U CN213752109U CN 213752109 U CN213752109 U CN 213752109U CN 202023107194 U CN202023107194 U CN 202023107194U CN 213752109 U CN213752109 U CN 213752109U
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layer
retardant
flame
arc
core
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赵文明
罗伯啟
罗娅
高天修
王琴
张俊霞
毛剑颖
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Guizhou Xinshuguang Cable Co ltd
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Guizhou Xinshuguang 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
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Abstract

The utility model discloses a halogen-free low-smoke flame-retardant B1-grade power cable, which comprises a cable core, and a compression resistant layer, an inner sheath layer, a flame-retardant layer, an armor layer and an outer sheath layer which are sequentially coated outside the cable core; the cable core comprises an elastic core and four wire cores, the cross section of the elastic core is in a quadrangular shape, four side walls of the elastic core are respectively provided with accommodating grooves, the lower half parts of the four wire cores are respectively arranged in the four accommodating grooves, the outer parts of the four side walls of the elastic core are respectively provided with a first arc-shaped plate with an arc opening facing the elastic core, the upper half parts of the wire cores are respectively positioned in the arc-shaped cavities of the first arc-shaped plates, and four edge parts of the elastic core are respectively provided with a second arc-shaped plate with an arc opening facing the pressure-resistant layer; the wire core comprises a copper conductor, and a fire-resistant layer and an insulating layer which are sequentially coated outside the copper conductor; the flame-retardant layer comprises a flame-retardant inner layer, a belting layer and a flame-retardant outer layer. The utility model discloses aim at solving current power cable fire prevention fire behaviour poor, compressive property subalternation technical problem.

Description

Halogen-free low-smoke flame-retardant B1-grade power cable
Technical Field
The utility model relates to a power cable technical field especially relates to a there is not steamed low fire-retardant B1 level power cable of cigarette.
Background
A power cable is a cable for transmitting and distributing electrical energy. The safety of the electrical lines is of critical importance, whether in a factory or in a building. According to the statistics of relevant departments of the country, the fire caused by an electric line accounts for more than 50% of the causes of the fire. The power cable is a main body in the circuit and is a link difficult to protect. Therefore, in order to reduce the fire hazard, improve the personal safety and reduce the property loss, a fireproof and flame-retardant halogen-free low-smoke flame-retardant B1-grade power cable is required to be adopted in places with dense population (such as subways, markets and the like), and the halogen-free low-smoke flame-retardant B1-grade power cable is required to examine not only the flame spread height, but also a series of combustion characteristics of the cable, such as heat release, smoke generation condition, smoke density, vertical spread and combustion dripping/particle grade, smoke toxicity grade, corrosivity grade and the like. Compared with the conventional flame-retardant cable, the B1-grade power cable not only requires halogen-free low-smoke flame retardance, but also has higher requirements on the combustion characteristic of the cable.
However, the existing fireproof flame-retardant B1-grade power cable still has defects and deficiencies in fireproof flame-retardant performance, when the power cable works in a high-temperature environment for a long time or is in an open fire environment for a long time, frequent burning and damage still occur, further fire and explosion accidents are caused, and a huge threat to personal and property safety is caused, and the safety factor is low.
To above technical problem, the utility model discloses a there is not steamed low fire-retardant B1 level power cable of cigarette, the utility model has the advantages of improve power cable's fire prevention fire behaviour, improve power cable's compressive property, extension power cable's life, factor of safety height.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, a there is not steamed low fire-retardant B1 level power cable of cigarette that lacks is provided, still there are defect and not enough in the aspect of the fire prevention flame retardant property with current fire-retardant B1 level power cable among the solution prior art, work for a long time in high temperature environment or the environment of being in naked light for a long time when power cable, the condition that still frequently appears burning damage, further cause conflagration and explosion accident, the huge threat that causes person and property safety, factor of safety is low, in addition, current fire-retardant B1 level power cable's inner structure intensity is low, technical problem such as compressive capacity is weak, the utility model has the advantages of the fire prevention flame retardant property that improves power cable, improve power cable's compressive property, prolong power cable's life, factor of safety is high.
The utility model discloses a following technical scheme realizes: the utility model discloses a halogen-free low-smoke flame-retardant B1-grade power cable, which comprises a cable core, and a compression resistant layer, an inner sheath layer, a flame-retardant layer, an armor layer and an outer sheath layer which are sequentially coated outside the cable core, wherein the inner sheath layer and the outer sheath layer are both made of low-smoke halogen-free flame-retardant polyolefin materials; the cable core comprises an elastic core and four wire cores, the cross section of the elastic core is in a quadrangular shape, the four side walls of the elastic core are provided with accommodating grooves along the extending direction of the elastic core, the cross section of the accommodating grooves is in a semicircular shape, the lower half parts of the four wire cores are respectively arranged in the four accommodating grooves, the outer parts of the four side walls of the elastic core are respectively provided with a first arc-shaped plate with an arc opening facing the elastic core, the two ends of the arc opening of the first arc-shaped plate are connected with the side walls of the elastic core, the upper half parts of the wire cores are respectively positioned in the arc cavities of the first arc-shaped plate, the four edge parts of the elastic core are respectively provided with a second arc-shaped plate with an arc opening facing the compression resistant layer, the two ends of the arc opening of the second arc-shaped plate are respectively and tightly abutted against the inner wall of the compression resistant layer, the inner wall of the compression resistant layer is provided with, Fire-resistant filling ropes are arranged between the first arc-shaped plate and the compression-resistant layer and between the second arc-shaped plate and the compression-resistant layer, the elastic core, the first arc-shaped plate and the second arc-shaped plate are all made of flame-retardant TPU materials; the wire core comprises a copper conductor, and a fire-resistant layer and an insulating layer which are sequentially coated outside the copper conductor, wherein the insulating layer is made of a silane cross-linked polyethylene material; the flame-retardant layer comprises a flame-retardant inner layer, a belting layer and a flame-retardant outer layer, wherein the flame-retardant inner layer is filled with a flame retardant, and the flame-retardant outer layer is filled with an inorganic mineral material.
Preferably, in order to improve the compression resistance of the power cable, the middle portion of the elastic core is provided with a reinforcing core along the direction in which the elastic core extends.
Preferably, in order to improve power cable's compressive property, the inside of elasticity core still is provided with the reinforcing plate along the direction that the elasticity core extends, and the upper and lower both ends of reinforcing plate are towards the edge department of reinforcing core and elasticity core respectively, and the reinforcing plate sets up with the sinle silk is crisscross, and the reinforcing plate all adopts fire-retardant PVC material to make with the reinforcing core.
Preferably, in order to improve the fireproof and flame-retardant performance of the power cable, the fireproof layer is formed by wrapping a fireproof mica tape.
Preferably, in order to improve the fireproof and flame retardant performance of the power cable, the wrapping tape layer is formed by wrapping a low-smoke halogen-free high-flame retardant tape.
Preferably, the armor layer is formed by wrapping galvanized steel strips.
Preferably, the fire-resistant filling rope is a low-smoke halogen-free flame-retardant polypropylene rope.
The utility model has the advantages of it is following:
(1) the utility model discloses in, the outside of copper conductor is provided with the flame retardant coating, between sinle silk and the first arc, all be provided with fire-resistant packing rope between first arc and the resistance to compression layer and between second arc and the resistance to compression layer, be provided with fire-retardant layer between inner sheath layer and the armor, fire-retardant layer comprises fire-retardant inlayer, band layer and fire-retardant skin, fire-retardant inlayer is filled by the fire retardant, the band layer is formed by low smoke and zero halogen high flame retardant band winding, fire-retardant skin is filled by inorganic mineral material, inner sheath layer, outer sheath layer, insulating layer, the resistance to compression layer, the elasticity core, first arc, the second arc all adopts fire-retardant material to make, thereby, the fire-retardant performance of preventing fires of power cable has been showing to be improved, factor of safety is high;
(2) in the utility model, the outer part of the cable core is provided with the anti-pressure layer, the middle part of the cable core is provided with the elastic core, the four side walls of the elastic core are all provided with the containing grooves along the extending direction of the elastic core, the cross section of the containing grooves is semicircular, the lower half parts of the four wire cores are respectively arranged in the four containing grooves, thereby the elastic core can well support and protect the wire core, the first arc-shaped plate is arranged outside the wire core, the second arc-shaped plates are respectively arranged at the four edges of the elastic core, therefore, when the power cable is extruded and impacted by external force, the external force acts on the first arc-shaped plate and the second arc-shaped plate, thereby acting on the elastic core, avoiding the damage of the wire core caused by the direct action of external force on the wire core, therefore, the compression resistance of the power cable is remarkably improved, the service life of the power cable is prolonged, and the safety factor of the power cable is improved.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the cable core;
figure 3 is a cross-sectional view of an elastic core.
In the figure: 1. a cable core; 11. an elastic core; 111. a containing groove; 112. a reinforcing core; 113. a reinforcing plate; 12. a wire core; 121. A copper conductor; 122. a refractory layer; 123. an insulating layer; 2. a pressure resistant layer; 21. a limiting edge; 3. an inner jacket layer; 4. a flame retardant layer; 41. a flame retardant inner layer; 42. a belting layer; 43. a flame retardant outer layer; 5. an armor layer; 6. an outer jacket layer; 7. a first arc-shaped plate; 8. a second arc-shaped plate; 9. a fire resistant filler rope.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
Embodiment 1 discloses a halogen-free low-smoke flame-retardant B1-grade power cable, which comprises a cable core 1, and a compression-resistant layer 2, an inner sheath layer 3, a flame-retardant layer 4, an armor layer 5 and an outer sheath layer 6 which are sequentially coated outside the cable core 1, wherein the inner sheath layer 3 and the outer sheath layer 6 are both made of low-smoke halogen-free flame-retardant polyolefin materials, and the armor layer 5 is formed by wrapping galvanized steel strips; as shown in fig. 1 and 2, the cable core 1 comprises an elastic core 11 and four wire cores 12, wherein the cross section of the elastic core 11 is in a quadrangular shape; as shown in fig. 3, the four side walls of the elastic core 11 are provided with receiving grooves 111 along the extending direction of the elastic core 11, and the cross section of the receiving groove 111 is "semicircular"; as shown in fig. 1 and 2, the lower half portions of the four wire cores 12 are respectively disposed in the four receiving grooves 111, the middle portion of the elastic core 11 is provided with a reinforcing core 112 along the extending direction of the elastic core 11, the interior of the elastic core 11 is further provided with a reinforcing plate 113 along the extending direction of the elastic core 11, the upper and lower ends of the reinforcing plate 113 respectively face the edges of the reinforcing core 112 and the elastic core 11, the reinforcing plate 113 and the wire cores 12 are disposed in a staggered manner, the reinforcing plate 113 and the reinforcing core 112 are both made of flame retardant PVC material, the exterior of the four side walls of the elastic core 11 is respectively provided with a first arc plate 7 having arc openings facing the elastic core 11, both ends of the arc opening of the first arc plate 7 are connected with the side wall of the elastic core 11, the upper half portions of the wire cores 12 are respectively located in the arc cavities of the first arc plates 7, the four edges of the elastic core 11 are respectively provided with second arc plates 8 having arc openings facing the pressure-resistant layer, both ends of the arc opening of the second arc plates 8 are tightly abutted against the inner wall of the pressure-resistant layer 2, spacing edges 21 are arranged on the inner wall of the pressure-resistant layer 2 at intervals, the spacing edges 21 are respectively positioned at the outer sides of two ends of an arc opening of the second arc-shaped plate 8, fire-resistant filling ropes 9 are respectively arranged between the wire core 12 and the first arc-shaped plate 7, between the first arc-shaped plate 7 and the pressure-resistant layer 2 and between the second arc-shaped plate 8 and the pressure-resistant layer 2, the fire-resistant filling ropes 9 are low-smoke halogen-free fire-resistant polypropylene ropes, and the pressure-resistant layer 2, the elastic core 11, the first arc-shaped plate 7 and the second arc-shaped plate 8 are all made of fire-resistant TPU materials; the wire core 12 comprises a copper conductor 121, and a fire-resistant layer 122 and an insulating layer 123 which are sequentially coated outside the copper conductor 121, wherein the fire-resistant layer 122 is formed by wrapping a low-smoke halogen-free high-flame-retardant tape, and the insulating layer 123 is made of a silane cross-linked polyethylene material; the flame-retardant layer 4 comprises a flame-retardant inner layer 41, a wrapping layer 42 and a flame-retardant outer layer 43, wherein the flame-retardant inner layer 41 is filled with a flame retardant, the wrapping layer 42 is formed by wrapping a low-smoke halogen-free high-flame-retardant tape, and the flame-retardant outer layer 43 is filled with an inorganic mineral material.
The principle of the utility model is as follows: the utility model discloses in, the outside of copper conductor 121 is provided with flame retardant coating 122, between sinle silk 12 and the first arc 7, between first arc 7 and the resistance to compression layer 2 and between second arc 8 and the resistance to compression layer 2 all be provided with fire-resistant packing rope 9, be provided with fire-retardant layer 4 between inner sheath layer 3 and the armor 5, fire-retardant layer 4 comprises fire-retardant inlayer 41, band layer 42 and fire-retardant outer 43, fire-retardant inlayer 41 is filled by the fire retardant, band layer 42 is formed by low smoke and zero halogen high fire-retardant band winding, fire-retardant outer 43 is filled by inorganic mineral material, inner sheath layer 3, outer sheath layer 6, insulating layer 123, resistance to compression layer 2, elasticity core 11, first arc 7, second arc 8 all adopts fire-retardant material to make, thereby, the fire-retardant performance of preventing of power cable is showing to be improved, factor of safety is high; in the utility model, the outer part of the cable core 1 is provided with the pressure-resistant layer 2, the middle part of the cable core 1 is provided with the elastic core 11, the four side walls of the elastic core 11 are all provided with the containing grooves 111 along the extending direction of the elastic core 11, the cross section of the containing grooves 111 is in a semi-circular shape, the lower half parts of the four wire cores 12 are respectively arranged in the four containing grooves 111, thereby the wire cores 12 are well supported and protected by the elastic core 11, the outer part of the wire cores 12 is provided with the first arc-shaped plate 7, the four edges of the elastic core 11 are respectively provided with the second arc-shaped plates 8, thereby, when the power cable is extruded and impacted by external force, the external force acts on the first arc-shaped plate 7 and the second arc-shaped plates 8, and further acts on the elastic core 11, the damage of the wire cores 12 caused by the direct action of the external force on the wire cores 12 is avoided, thereby, the compression resistance of the power cable is obviously improved, the service life of the power cable is prolonged, the safety factor of the power cable is improved.

Claims (7)

1. A halogen-free low-smoke flame-retardant B1-grade power cable is characterized by comprising a cable core, and a compression-resistant layer, an inner sheath layer, a flame-retardant layer, an armor layer and an outer sheath layer which are sequentially coated outside the cable core, wherein the inner sheath layer and the outer sheath layer are both made of low-smoke halogen-free flame-retardant polyolefin materials;
the cable core comprises an elastic core and four wire cores, the cross section of the elastic core is in a quadrangular shape, the four side walls of the elastic core are provided with accommodating grooves along the extending direction of the elastic core, the cross section of the accommodating grooves is in a semicircular shape, the lower half parts of the four wire cores are respectively arranged in the four accommodating grooves, the outer parts of the four side walls of the elastic core are respectively provided with a first arc-shaped plate with arc openings facing the elastic core, the two ends of the arc opening of the first arc-shaped plate are connected with the side walls of the elastic core, the upper half parts of the wire cores are respectively positioned in the arc cavities of the first arc-shaped plate, the four edges of the elastic core are respectively provided with a second arc-shaped plate with arc openings facing the pressure-resistant layer, the two ends of the arc opening of the second arc-shaped plate are tightly abutted to the inner wall of the pressure-resistant layer, and the inner wall of the pressure-resistant layer is provided with limiting edges at intervals, the limiting edges are respectively positioned on the outer sides of two ends of an arc opening of the second arc-shaped plate, fire-resistant filling ropes are respectively arranged between the wire core and the first arc-shaped plate, between the first arc-shaped plate and the pressure-resistant layer and between the second arc-shaped plate and the pressure-resistant layer, the elastic core, the first arc-shaped plate and the second arc-shaped plate are all made of flame-retardant TPU materials;
the cable core comprises a copper conductor, and a fire-resistant layer and an insulating layer which are sequentially coated outside the copper conductor, wherein the insulating layer is made of a silane cross-linked polyethylene material;
the flame-retardant layer comprises a flame-retardant inner layer, a wrapping tape layer and a flame-retardant outer layer, wherein the flame-retardant inner layer is filled with a flame retardant, and the flame-retardant outer layer is filled with an inorganic mineral material.
2. The halogen-free low-smoke flame-retardant grade B1 power cable according to claim 1, wherein the middle portion of the elastic core is provided with a reinforcing core along the extending direction of the elastic core.
3. The halogen-free low-smoke flame-retardant B1-grade power cable according to claim 2, wherein a reinforcing plate is further arranged inside the elastic core along the extending direction of the elastic core, the upper end and the lower end of the reinforcing plate face the edge of the reinforcing core and the edge of the elastic core respectively, the reinforcing plate and the wire core are arranged in a staggered manner, and the reinforcing plate and the reinforcing core are both made of flame-retardant PVC materials.
4. The halogen-free, low-smoke, flame-retardant grade B1 power cable of claim 1, wherein the flame retardant layer is wrapped with fire-resistant mica tape.
5. The halogen-free low-smoke flame-retardant grade B1 power cable of claim 1, wherein the wrapping tape layer is formed by wrapping a low-smoke halogen-free high-flame-retardant tape.
6. The halogen-free, low-smoke, flame-retardant grade B1 power cable of claim 1, wherein the armor layer is wrapped with galvanized steel tape.
7. The halogen-free low-smoke flame-retardant grade B1 power cable of claim 1, wherein the fire-resistant filler rope is low-smoke halogen-free flame-retardant polypropylene rope.
CN202023107194.5U 2020-12-22 2020-12-22 Halogen-free low-smoke flame-retardant B1-grade power cable Active CN213752109U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023107194.5U CN213752109U (en) 2020-12-22 2020-12-22 Halogen-free low-smoke flame-retardant B1-grade power cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023107194.5U CN213752109U (en) 2020-12-22 2020-12-22 Halogen-free low-smoke flame-retardant B1-grade power cable

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CN213752109U true CN213752109U (en) 2021-07-20

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