Flame-retardant electric wire cable

Abstract

The utility model belongs to the field of electric wire and cable, specifically is a kind of flame-retardant electric wire and cable, including abrasion-resistant layer, waterproof layer, flame-retardant layer, shielding layer and insulating layer from outside to inside are sequentially arranged.Abrasion-resistant layer includes the protective sleeve of arc-shaped pad block, waterproof layer is the bellows structure and is equipped with inner wall groove, flame-retardant layer is made of low smoke halogen-free flame-retardant polyolefin material and is equipped with the protruding piece embedded with recess, shielding layer is copper wire braided structure, and insulating layer is equipped with cross-shaped partition block and forms multiple accommodating cavities, cavity fills silicon rubber insulating rubber material and is provided with wire core, and the structure effectively improves the abrasion resistance, waterproof, flame-retardant and anti-interference performance of cable, guarantees the safe and stable operation of wire core in complex environment.

Description

Technical Field

[0001] This utility model relates to the field of wires and cables, specifically a flame-retardant wire and cable. Background Technology

[0002] As crucial carriers of power and signal transmission, wires and cables are widely used in construction, transportation, energy, and communications. However, in complex operating environments, cables often face multiple challenges, including mechanical wear, moisture penetration, fire risks, and electromagnetic interference. Especially under harsh conditions such as high temperature, high humidity, flammability, or strong electromagnetic interference, the structure and materials of traditional cables often fail to fully meet the usage requirements.

[0003] In existing technologies, wires and cables, as key carriers for power or signal transmission, are often used in complex and diverse environments, such as humid, friction-prone, electromagnetically susceptible, or fire-risk scenarios. However, traditional wires and cables have the following shortcomings:

[0004] 1. Poor flame retardant performance: Most of them use halogen-containing flame retardant materials, which release toxic fumes and corrosive gases when burning, which not only endangers personnel safety, but also increases the difficulty of fire rescue; at the same time, the flame retardant structure of some cables is simple and it is difficult to effectively prevent the flame from spreading radially.

[0005] 2. Insufficient abrasion resistance and protection: The outer sheath is mostly a smooth structure, which is easily damaged by friction during laying, dragging or long-term use, which in turn leads to exposure of the internal structure, water ingress or damage to the wire core.

[0006] 3. Poor internal structural stability: The wire cores are mostly arranged randomly or simply bundled, which can easily cause mutual friction due to vibration and bending, leading to damage to the insulation layer. At the same time, there is a lack of reliable connection between the structural layers, which can easily lead to delamination after long-term use and reduce the overall service life. Therefore, a flame-retardant wire and cable is proposed to address the above problems. Utility Model Content

[0007] To overcome the shortcomings of existing technologies and address the problems of poor flame retardancy, insufficient wear resistance, and poor internal structural stability of traditional wires and cables, this utility model proposes a flame-retardant wire and cable.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a flame-retardant wire and cable, comprising a wear-resistant layer, a waterproof layer, a flame-retardant layer, a shielding layer and an insulation layer arranged sequentially from the outside to the inside.

[0009] The wear-resistant layer includes a protective sleeve and a pad fixed to the outer surface of the protective sleeve.

[0010] The waterproof layer includes a waterproof liner and a groove on its inner wall.

[0011] The flame-retardant layer includes a flame-retardant sheath and protrusions on its outer wall, the protrusions being fitted into the grooves.

[0012] The shielding layer is tightly wrapped around the inner surface of the flame-retardant sheath.

[0013] The insulating layer is provided with a partition block, which divides the interior of the insulating layer into multiple receiving cavities. Each receiving cavity is filled with an insulating filler layer and has a wire core.

[0014] Preferably, the pads are spaced apart along the length of the protective sleeve, and the cross-section of the pads is arc-shaped.

[0015] Preferably, the grooves are evenly distributed circumferentially along the inner wall of the waterproof liner.

[0016] Preferably, the flame-retardant sheath is made of low-smoke halogen-free flame-retardant polyolefin material, and the protrusion and the flame-retardant sheath are integrally formed.

[0017] Preferably, the separator is cross-shaped and is integrally injection molded with the insulating layer.

[0018] Preferably, the insulating filler layer is made of silicone rubber insulating material, and the shielding layer is a copper wire braided shielding layer.

[0019] Preferably, the waterproof liner has a corrugated pipe structure and is made of chlorinated polyethylene material.

[0020] The advantages of this utility model are:

[0021] 1. This utility model achieves the function of reducing the direct friction area between the cable and the contact surface and dispersing the impact of external forces by setting the arc-shaped pads at intervals on the outer surface of the protective sleeve in the wear-resistant layer. It solves the problem that the outer sheath of traditional cables is easily damaged by friction, and improves the wear resistance and protection capability of the cable and the service life of the outer layer.

[0022] 2. This utility model achieves the functions of suppressing flame spread, not releasing toxic fumes, and delaying the radial spread of flame by using a flame-retardant sheath made of low-smoke halogen-free flame-retardant polyolefin material for the flame-retardant layer and having a protrusion on the outer wall that fits into the groove of the waterproof layer. This solves the problems of traditional cable flame-retardant materials releasing toxic gases and having a single flame-retardant structure, and improves the flame-retardant safety and reliability of cables.

[0023] 3. This utility model achieves the functions of isolating the wire core, avoiding friction and enhancing insulation by setting cross-shaped partition blocks in the insulation layer to form multiple cavities and filling the cavities with silicone rubber insulating material. It solves the problems of insulation damage and easy delamination between layers caused by the disordered arrangement of wire cores in traditional cables, and improves the stability and insulation performance of the internal structure of the cable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the flame-retardant wire and cable structure of this utility model;

[0026] Figure 2 For the present utility model Figure 1 A magnified view of the structure at point A in the middle;

[0027] Figure 3 This is a schematic diagram of the internal structure of the flame-retardant wire and cable of this utility model.

[0028] Figure 4 This is a schematic diagram of the waterproof layer structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the flame-retardant layer of this utility model.

[0030] In the diagram: 1. Wear-resistant layer; 101. Protective sleeve; 102. Pad; 2. Waterproof layer; 201. Waterproof liner; 202. Groove; 3. Flame-retardant layer; 301. Flame-retardant sheath; 302. Protrusion; 4. Shielding layer; 5. Insulation layer; 6. Separator; 7. Insulating filler layer; 8. Wire core. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a flame-retardant wire and cable. (Refer to...) Figures 1 to 5 A flame-retardant wire and cable includes, from the outside to the inside, a wear-resistant layer 1, a waterproof layer 2, a flame-retardant layer 3, a shielding layer 4, and an insulation layer 5.

[0034] The wear-resistant layer 1 includes a protective sleeve 101 and pads 102 fixed to the outer surface of the protective sleeve 101. The pads 102 are spaced apart along the length of the protective sleeve 101, and the cross-section of the pads 102 is arc-shaped.

[0035] Preferably, the protective sleeve 101 is made of high-hardness polyethylene material, which has basic wear resistance. The arc-shaped pads 102 are distributed at intervals along the length direction. The purpose of the design is to reduce the direct friction area between the cable and the contact surface, and to achieve "wear-resistant buffering" by first contacting the pads. The arc-shaped structure can disperse the impact of external forces and avoid local stress concentration that could lead to the breakage of the protective sleeve. The interval distribution leaves a certain gap to facilitate heat dissipation and bending deformation during laying.

[0036] The waterproof layer 2 includes a waterproof liner 201 and a groove 202 provided on its inner wall. The groove 202 is evenly distributed along the circumference of the inner wall of the waterproof liner 201. The waterproof liner 201 has a corrugated pipe structure and is made of chlorinated polyethylene material.

[0037] Preferably, the waterproof liner 201 is made of chlorinated polyethylene (CPE), which has the following advantages: CPE has excellent weather resistance, chemical corrosion resistance and waterproof properties, and good flexibility to meet the bending requirements of cables. The corrugated protrusions of the corrugated pipe increase the structural strength and can resist deformation caused by external pressure. The corrugated gaps form a "maze-like" waterproof channel to slow down the rate of water penetration. The grooves 202 evenly distributed around the inner wall fit into the protrusions 302 of the flame-retardant layer, enhancing the bonding force between the two layers and preventing relative sliding. At the same time, it further blocks the path of water penetration along the interlayer gaps.

[0038] The flame-retardant layer 3 includes a flame-retardant sheath 301 and a protrusion 302 disposed on its outer wall. The protrusion 302 is fitted into the groove 202. The flame-retardant sheath 301 is made of low-smoke halogen-free flame-retardant polyolefin material. The protrusion 302 and the flame-retardant sheath 301 are integrally formed.

[0039] The protrusion 302 and the flame-retardant sheath 301 are integrally formed. In addition to fitting into the groove 202 to enhance structural stability, the protrusion and the groove can also form a "thermal barrier" to slow down the radial spread of the flame.

[0040] The shielding layer 4 is tightly wrapped around the inner surface of the flame-retardant sheath 301. The shielding layer 4 is a copper wire braided shielding layer. Copper has excellent conductivity and can quickly absorb and export interference signals. The braided structure takes into account both the shielding effect and the flexibility of the cable.

[0041] The insulating layer 5 is provided with a partition block 6, which divides the interior of the insulating layer 5 into multiple cavities. Each cavity is filled with an insulating filler rubber layer 7 and has a wire core 8. The insulating filler rubber layer 7 is made of silicone rubber insulating material. The partition block 6 is cross-shaped and is an integral injection molded structure with the insulating layer 5.

[0042] The cross-shaped separator 6 and the insulation layer 5 are integrally injection molded, dividing the interior into 4 independent cavities, physically isolating the wire cores 8, avoiding damage to the insulation layer due to contact friction between the wire cores 8, reducing electromagnetic interference between the wire cores, and improving transmission stability.

[0043] Working principle:

[0044] External abrasion protection: In the outermost abrasion-resistant layer 1, the protective sleeve 101 provides basic protection, and the arc-shaped pads 102 distributed at intervals on its outer surface are in direct contact with the outside. When the cable is subjected to friction or impact, the pads 102 can disperse the external force, reduce the direct friction area between the protective sleeve 101 and the contact surface, avoid damage to the protective sleeve 101 due to local wear or stress concentration, and extend the service life of the outer layer.

[0045] Waterproof barrier: The waterproof liner 201 of the waterproof layer 2 is a corrugated pipe structure and made of chlorinated polyethylene material. The corrugated gaps form a "maze-like" barrier to delay water penetration. At the same time, the groove 202 on the inner wall of the waterproof liner 201 is tightly fitted with the protrusion 302 on the outer wall of the flame retardant layer 3, which not only prevents the two layers from sliding relative to each other, but also further blocks the path of water penetration along the gaps between the layers. The double structure ensures that water is difficult to enter the inner layer.

[0046] Flame retardant protection: If exposed to open flame or high temperature, the flame retardant sheath 301 of the flame retardant layer 3 will quickly take effect. Its flame retardant properties will inhibit the spread of flame and will not release toxic fumes or halogen gases when burning. The fit between the protrusion 302 and the groove 202 is tight, which will delay the transfer of heat to the inside and buy time for the inner structure to be protected.

[0047] Anti-interference shielding: The shielding layer 4 is a copper wire braided structure, tightly wrapped around the inner surface of the flame-retardant layer 3. When the cable is in an electromagnetic environment, the copper wire braided layer absorbs and conducts external electromagnetic interference signals, while simultaneously blocking the outward diffusion of electromagnetic radiation generated by the internal cores 8 during transmission, thus avoiding signal interference between the cores 8 or with external equipment and ensuring transmission stability.

[0048] Internal insulation and stable transmission: The cross-shaped partitions 6 within the insulation layer 5 divide the space into multiple independent cavities, and the wire cores 8 within each cavity are wrapped by an insulating filler layer 7. The partitions 6 prevent insulation damage caused by direct contact and friction between the wire cores 8 and the insulation layer 7 further enhances the insulation performance, while buffering the stress on the wire cores 8 during bending or vibration, ensuring efficient transmission of the wire cores 8 in a stable insulating environment.

[0049] Through the coordinated work of the above layers, the cable provides effective protection in terms of wear resistance, water resistance, flame retardancy, and interference resistance, ensuring the safe and stable operation of core 8 in complex environments.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A flame-retardant electric wire cable, characterized by: It includes, from the outside to the inside, a wear-resistant layer (1), a waterproof layer (2), a flame-retardant layer (3), a shielding layer (4), and an insulating layer (5); The wear-resistant layer (1) includes a protective sleeve (101) and a pad (102) fixed to the outer surface of the protective sleeve (101); The waterproof layer (2) includes a waterproof liner (201) and a groove (202) provided on its inner wall; The flame-retardant layer (3) includes a flame-retardant sheath (301) and a protrusion (302) disposed on its outer wall, wherein the protrusion (302) is fitted into the groove (202); The shielding layer (4) tightly covers the inner surface of the flame-retardant sheath (301); The insulating layer (5) is provided with a partition block (6), which divides the interior of the insulating layer (5) into multiple cavities. Each cavity is filled with an insulating filler layer (7) and has a wire core (8).

2. A flame-retardant electrical wire and cable according to claim 1, characterized in that: The pads (102) are spaced apart along the length of the protective sleeve (101), and the cross-section of the pads (102) is arc-shaped.

3. The flame-retardant wire and cable according to claim 1, characterized in that: The grooves (202) are evenly distributed along the inner circumference of the waterproof liner (201).

4. A fire-retardant electrical wire cable according to claim 1, wherein: The flame-retardant sheath (301) is made of low-smoke halogen-free flame-retardant polyolefin material, and the protrusion (302) and the flame-retardant sheath (301) are integrally formed.

5. A fire-retardant electrical wire cable according to claim 1, wherein: The separator (6) is cross-shaped and is integrally injection molded with the insulating layer (5).

6. A fire-retardant electrical wire cable according to claim 1, wherein: The insulating filler layer (7) is made of silicone rubber insulating material, and the shielding layer (4) is a copper wire braided shielding layer.

7. A flame-retardant electrical wire and cable according to claim 1, wherein: The waterproof liner (201) has a corrugated pipe structure and is made of chlorinated polyethylene material.

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