Flame-retardant and waterproof cable

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a flame-retardant and waterproof cable, which comprises a wire core, the wire core is oxygen-free raw copper, an electromagnetic shielding layer is coated on the wire core, an insulating layer is coated on the electromagnetic shielding layer, the insulating layer is coated inside a first sheath, a framework is filled between the insulating layers, and the framework is filled between the insulating layers. A filling layer and a tearing rope are further arranged in a space formed by the insulating layer and the interior of the first sheath, and the first sheath is coated with a flame-retardant coating. According to the utility model, the flame-retardant coating is made of a nitrogen-based flame retardant, so that fire spreading can be effectively prevented in case of fire, the safety of the cable in a fire environment is improved, and fire damage is reduced; the waterproof coating is formed by coating a polyethylene material, an effective waterproof barrier can be formed, it is ensured that the cable can still work normally in a humid environment or when the cable makes contact with water, the service life of the cable is prolonged, most of the adopted materials are relatively low in cost, and the cable has high cost performance while the performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flame-retardant and waterproof cable. Background Technique

[0002] In the existing technology, with the enhancement of people's awareness of environmental protection and safety, green cables have been paid more and more attention.

[0003] A cable is usually a rope-like cable formed by stranding several or several groups of wires. Each group of wires is insulated from each other and often twisted around a center. The whole is covered with a highly insulating covering layer. It is mostly erected in the air or installed underground or underwater for telecommunications or power transmission.

[0004] However, the protective layer used in the current cables on the market usually produces a large amount of smoke when burning, which is not conducive to human health. Even in the event of a fire, it affects people's escape from the fire scene, and its waterproof effect is not good and is restricted by the region.

[0005] Therefore, we propose a flame-retardant and waterproof cable to solve the above problems. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] In view of the deficiencies of the prior art, the utility model provides a flame-retardant and waterproof cable, which solves the problems raised in the above background technique.

[0008] (2) Technical Solutions

[0009] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0010] A flame-retardant and waterproof cable includes a wire core, the wire core is oxygen-free raw copper, an electromagnetic shielding layer is coated on the wire core, an insulating layer is coated on the electromagnetic shielding layer, the insulating layer is coated inside a first sheath. Among them, a skeleton is filled between the insulating layers, and a filling layer and a tearing rope are also provided in the space formed between the insulating layer and the inside of the first sheath. A flame-retardant coating is applied on the first sheath, a second sheath is coated on the first sheath, and a waterproof coating is applied on the second sheath.

[0011] Furthermore, the electromagnetic shielding layer is woven into a mesh structure by a metal braided net, and the metal is copper wire or silver wire.

[0012] Furthermore, the insulating layer is a structural layer composed of polyvinyl chloride or polyethylene.

[0013] Furthermore, the skeleton selects a triangular or four-pointed star structure according to the number of wire cores, and the skeleton is made of glass fiber reinforced plastic.

[0014] Furthermore, the filling layer is filled with a flame-retardant rubber or a flame-retardant foaming material, and the tearing rope is supported by high-strength polyethylene fibers.

[0015] Furthermore, the flame-retardant coating is a nitrogen-based flame retardant, including melamine, melamine-isocyanuric acid, and melamine-pyrophosphate; the waterproof coating is formed by coating with a polyethylene material.

[0016] Furthermore, the first sheath and the second sheath are polyvinyl chloride structural sheaths.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present utility model provides a flame-retardant and waterproof cable, which has the following beneficial effects:

[0019] In the present utility model, since the flame-retardant coating is composed of a nitrogen-based flame retardant, it can effectively prevent the spread of fire when encountering fire, improve the safety of the cable in a fire environment, and reduce fire damage; the waterproof coating is formed by coating with a polyethylene material, which can form an effective waterproof barrier to ensure that the cable can still work normally when in a humid environment or in contact with water, extend the service life of the cable, and most of the materials used have relatively low costs, having a high cost performance while ensuring performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a three-dimensional structural diagram of the present utility model.

[0022] In the figure: 1, core; 2, electromagnetic shielding layer; 3, insulating layer; 4, skeleton; 5, filling layer; 6, tearing rope; 7, first sheath; 8, flame-retardant coating; 9, second sheath; 10, waterproof coating. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment

[0025] As Figure 1-2As shown in the figure, a flame-retardant and waterproof cable proposed in an embodiment of the present utility model includes a wire core 1, the wire core 1 is made of oxygen-free raw copper, an electromagnetic shielding layer 2 is coated on the wire core 1, an insulating layer 3 is coated on the electromagnetic shielding layer 2, the insulating layer 3 is wrapped inside a first sheath 7. Among them, a skeleton 4 is filled between the insulating layers 3, and a filling layer 5 and a tearing rope 6 are also provided in the space formed between the insulating layer 3 and the inside of the first sheath 7. A flame-retardant coating 8 is coated on the first sheath 7, a second sheath 9 is coated on the first sheath 7, and a waterproof coating 10 is coated on the second sheath 9;

[0026] Wire core 1: Made of oxygen-free raw copper material, it has good electrical conductivity and mechanical strength and serves as the core for current transmission.

[0027] Electromagnetic shielding layer 2: A mesh structure woven from copper wires or silver wires, which can effectively shield external electromagnetic interference and ensure the accuracy and stability of signal transmission.

[0028] Insulating layer 3: Composed of polyvinyl chloride or polyethylene, it tightly wraps around the electromagnetic shielding layer 2, playing a good electrical insulation role to prevent leakage and short circuits.

[0029] Skeleton 4: Select a structure such as a triangle or a four-pointed star according to the number of wire cores 1. It is made of glass fiber reinforced plastic, provides support and fixation inside the cable, maintains the shape and structural stability of the cable, and at the same time enhances the tensile and compressive resistance of the cable.

[0030] Filling layer 5: Made of flame-retardant rubber or flame-retardant foaming material, it fills the space between the insulating layers 3 and between the insulating layer 3 and the first sheath 7, making the internal structure of the cable more compact and solid, reducing voids, and having a certain flame-retardant performance.

[0031] Tearing rope 6: Made of high-strength polyethylene fiber, it is convenient to easily peel off the cable outer skin when needed.

[0032] First sheath 7: A polyvinyl chloride structure sleeve, which provides further protection for the internal structure and has a certain mechanical strength and corrosion resistance.

[0033] Flame-retardant coating 8: Composed of nitrogen-based flame retardants such as melamine, melamine-isocyanuric acid, melamine-pyrophosphate, etc., coated on the first sheath 7, it can effectively prevent the spread of fire when encountering fire and improve the flame-retardant performance of the cable.

[0034] Second sheath 9: Also a polyvinyl chloride structure sleeve, which enhances the overall protection of the cable.

[0035] Waterproof coating 10: Coated with polyethylene material, it forms an effective waterproof barrier to prevent moisture from entering the cable interior and ensures that the cable can still work properly in a humid environment or when in contact with water;

[0036] Select oxygen-free raw copper material and process it into a wire core 1 that meets the requirements through processes such as wire drawing. Use copper wire or silver wire to braid into a mesh structure and tightly wrap it around the wire core 1 to form an electromagnetic shielding layer 2. Adopt polyvinyl chloride or polyethylene material and form an insulating layer 3 on the electromagnetic shielding layer 2 through an extrusion process. Select a triangular or four-pointed star-shaped fiberglass-reinforced plastic skeleton 4 according to the number of wire cores 1, place it between the insulating layers 3, fill the space formed between the insulating layer 3 and the inner part of the first sheath 7 with a flame-retardant rubber or flame-retardant foaming material as a filling layer 5. At the same time, place a tearing rope 6 made of high-strength polyethylene fiber, extrude polyvinyl chloride to form a first sheath 7, wrap it around the outer part of structures such as the insulating layer 3, evenly coat a nitrogen-based flame retardant on the first sheath 7 to form a flame-retardant coating 8, use polyvinyl chloride material to cover the outside of the first sheath 7 and the flame-retardant coating 8 to form a second sheath 9, and finally coat a polyethylene material on the second sheath 9 to form a waterproof coating 10.

[0037] As Figure 2 shown, in some embodiments, the electromagnetic shielding layer 2 is braided into a mesh structure by a metal braided mesh, and the metal is copper wire or silver wire; the braiding process of the metal braided mesh makes the shielding layer have good flexibility and ductility, and can closely fit on the wire core 1 and the insulating layer 3, providing an all-round electromagnetic shielding effect. Copper wire and silver wire, as braiding materials, have good electrical conductivity and thermal conductivity. Copper wire is more common and has a relatively low cost, and can effectively shield electromagnetic signals; silver wire has better electrical conductivity and oxidation resistance, but has a relatively high cost. While ensuring the shielding effect, this mesh structure will not have too much impact on the overall flexibility and bendability of the cable, facilitating the wiring and installation of the cable in different scenarios. It can effectively block external electromagnetic interference from entering the cable, and at the same time prevent the electromagnetic signals inside the cable from radiating outward, thereby ensuring the purity and stability of the signals transmitted by the cable.

[0038] As Figure 2 shown, in some embodiments, the insulating layer 3 is a structural layer composed of polyvinyl chloride or polyethylene; it has good chemical corrosion resistance and oil resistance, and can adapt to a variety of environmental conditions; at the same time, it has a certain mechanical strength and can play a good protective role for the internal wire core 1. The polyvinyl chloride insulating layer 3 has a relatively low cost and good processing performance, and is easy to mold and manufacture.

[0039] As Figure 2 shown, in some embodiments, the skeleton 4 selects a triangular or four-pointed star-shaped structure according to the number of wire cores 1, and the skeleton 4 is made of fiberglass-reinforced plastic; selecting different shapes according to the number of wire cores 1, the triangular or four-pointed star-shaped structure can well adapt to the layout of different numbers of wire cores 1 and provide stable support and fixation for the wire core 1. This shape design helps to maintain the regularity of the cable and the stability of the internal structure.

[0040] As Figure 2 shown, in some embodiments, the filling layer 5 is filled with a flame-retardant rubber or a flame-retardant foaming material, and the tearing cord 6 is supported by high-strength polyethylene fibers; when the flame-retardant rubber is used as the filling material, it has good flame-retardant performance and can effectively prevent the spread of fire and reduce the fire hazard in case of a fire or other situations. At the same time, it can also provide certain elasticity and buffering effect to protect the inner core 1. The flame-retardant foaming material has the advantages of light weight and heat insulation while having flame retardancy, which can reduce the overall weight of the cable and play a role in heat preservation and insulation to a certain extent;

[0041] The tearing cord 6 made of high-strength polyethylene fibers has high strength. When it is necessary to peel off the cable outer skin, it can be conveniently and quickly achieved by pulling the tearing cord 6 without causing too much damage to other parts of the cable. This material has excellent wear resistance and corrosion resistance and can maintain good performance during long-term use to ensure that it can function smoothly when needed. The setting of the tearing cord 6 improves the operation convenience of the cable during installation and maintenance.

[0042] As Figure 2 shown, in some embodiments, the flame-retardant coating 8 is a nitrogen-based flame retardant, including melamine, melamine-isocyanuric acid, and melamine-pyrophosphate; the waterproof coating 10 is formed by coating with polyethylene material; when melamine is heated, it will decompose and release non-combustible gases such as nitrogen, and these gases can play a role in diluting oxygen and blocking heat transfer, thereby effectively inhibiting the progress of combustion and achieving good flame-retardant effect. Compounds such as melamine-isocyanuric acid and melamine-pyrophosphate may have further improvement and optimization in flame-retardant performance, and they can play a stable flame-retardant effect under different temperatures and environmental conditions. The application of this nitrogen-based flame retardant makes the cable have higher safety and reliability when facing the fire risk;

[0043] The polyethylene material has excellent waterproof performance. It can form a continuous and dense waterproof film, which can effectively prevent the intrusion of moisture. Whether it is liquid water or water vapor, it is very difficult to penetrate through this polyethylene waterproof coating 10.

[0044] As Figure 1 shown, in some embodiments, the first sheath 7 and the second sheath 9 are polyvinyl chloride structural sheaths; polyvinyl chloride has good mechanical properties, can provide certain compressive, tensile and wear resistance for the cable, and effectively protects the internal various structural layers from external physical factors. Its corrosion resistance is also better, and it can adapt to various environmental conditions without being easily corroded. The cost of polyvinyl chloride is relatively low, and it has a high cost performance while meeting the performance requirements.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flame-retardant and waterproof cable, comprising a wire core (1), characterized in that: The wire core (1) is made of oxygen-free raw copper. An electromagnetic shielding layer (2) is coated on the wire core (1). An insulating layer (3) is coated on the electromagnetic shielding layer (2). The insulating layer (3) is coated inside a first sheath (7). Among them, a framework (4) is filled between the insulating layers (3). A filling layer (5) and a tearing cord (6) are also provided in the space formed between the insulating layer (3) and the inside of the first sheath (7). A flame-retardant coating (8) is coated on the first sheath (7). A second sheath (9) is coated on the first sheath (7). A waterproof coating (10) is coated on the second sheath (9).

2. A flame-retardant and waterproof cable according to claim 1, characterized in that: The electromagnetic shielding layer (2) is woven into a mesh structure by a metal braided mesh.

3. A flame-retardant and waterproof cable according to claim 1, characterized in that: The insulating layer (3) is a structural layer composed of polyvinyl chloride or polyethylene.

4. A flame-retardant and waterproof cable according to claim 1, characterized in that: The framework (4) selects a triangular or four-pointed star structure according to the number of wire cores (1). The framework (4) is made of glass fiber reinforced plastic.

5. A flame-retardant and waterproof cable according to claim 1, wherein: The filling layer (5) is filled with a flame-retardant rubber or a flame-retardant foaming material. The tearing cord (6) is made of high-strength polyethylene fiber.

6. A flame-retardant and waterproof cable according to claim 1, wherein: The first sheath (7) and the second sheath (9) are polyvinyl chloride structural sheaths.

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