Efficient flame-retardant polyvinyl chloride wire

Abstract

The utility model relates to the field of polyvinyl chloride wires, and discloses a high-efficiency flame-retardant polyvinyl chloride wire, which comprises a polyvinyl chloride layer, an insulating layer and a wire, the insulating layer is sleeved outside the wire, the polyvinyl chloride layer is sleeved outside the insulating layer, a flame-retardant structure is sleeved outside the polyvinyl chloride layer, and a protective layer is fixedly connected outside the flame-retardant structure. The two ends, corresponding to the outer surface of the protective layer, of the wires are connected with protective cover structures in an inserted mode, an existing polyvinyl chloride material is difficult to effectively resist flame, and when the wires are twisted and bent for use, some gaps exist in the wires in a shell, so that the inner wires are twisted and twisted together in the gaps, and the service life of the wires is affected. In addition, the cross section of the wire is usually exposed outside, long-time exposure affects the use performance of the wire, and the purpose of the utility model is to add a flame retardant structure outside the wire, add protective cover structures at two ends of the wire, and add a filling layer between wires.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of polyvinyl chloride electric wire, specifically to a kind of efficient flame-retardant polyvinyl chloride electric wire. BACKGROUND

[0002] As an important component for transmitting electrical energy and signals, the manufacturing process of electric wires is a key link to ensure product quality. The production process usually includes multiple steps, from the initial metal wire drawing to insulation treatment, and finally to cabling and inspection. The properties of conductor materials and insulating materials directly determine the electrical conductivity, durability and safety of electric wires. Common conductor materials include copper and aluminum. Copper is the preferred choice for most power applications due to its excellent electrical conductivity, good ductility and corrosion resistance. Electric wires need to consider multiple aspects, including material selection, structural design, manufacturing process and application areas. Polyvinyl chloride (PVC) electric wire is a widely used type of electric wire, and its insulating material is mainly made of polyvinyl chloride plastic.

[0003] Existing polyvinyl chloride electric wires perform well in current conduction, but their use scenarios are limited, especially in high-temperature and complex environments. Polyvinyl chloride material is difficult to effectively retard flame, and there are some gaps in the distribution of wires inside the electric wire shell. When in use, the electric wire may twist and bend, causing the internal wires to twist and mix together in the gaps, affecting the service life of the wires. In addition, the cross-section of the electric wire is usually exposed when not in use, which may affect the performance of the electric wire. Before use, a portion of the electric wire needs to be cut off, causing unnecessary waste. Therefore, we propose a kind of efficient flame-retardant polyvinyl chloride electric wire. SUMMARY

[0004] (I) Technical problem solved

[0005] To overcome the shortcomings of the prior art, the utility model provides an efficient flame-retardant polyvinyl chloride electric wire, which solves the above problems.

[0006] (II) Technical solution

[0007] To achieve the above purposes, the utility model provides the following technical scheme: an efficient flame-retardant polyvinyl chloride electric wire, comprising a polyvinyl chloride layer, an insulating layer and a wire, the wire is connected to the insulating layer, the insulating layer is connected to the polyvinyl chloride layer, the polyvinyl chloride layer is connected to a flame-retardant structure, the flame-retardant structure is fixedly connected to a protective layer outside, and the wire is connected to a protective cover structure at both ends of the outer surface of the protective layer.

[0008] Preferably, the gap between the insulating layer and the wire is filled with a filling layer.

[0009] Preferably, the flame-retardant structure includes a high-temperature-resistant layer, and the high-temperature-resistant layer is connected to the outer cylindrical surface of the polyvinyl chloride layer.

[0010] Preferably, the flame-retardant structure further comprises a fireproof layer, the fireproof layer is composed of a first flame-retardant layer, a second flame-retardant layer and a third flame-retardant layer, the first flame-retardant layer and the second flame-retardant layer are integrally formed by hot pressing, the outer cylindrical surface of the first flame-retardant layer and the second flame-retardant layer is coated with the third flame-retardant layer, and the side of the first flame-retardant layer and the second flame-retardant layer, which is away from the third flame-retardant layer, is connected to the side of the high-temperature-resistant layer, which is away from the polyvinyl chloride layer, by adhesive sleeve jointing.

[0011] Preferably, the side of the third flame-retardant layer, which is away from the first flame-retardant layer and the second flame-retardant layer, is connected to the protective layer by adhesive sleeve jointing.

[0012] Preferably, the protective cover structure comprises a protective cover, a waterproof layer and shock-absorbing rubber, the shock-absorbing rubber is connected to one side of the protective cover by plane clamping jointing, the other side of the shock-absorbing rubber is connected to the waterproof layer by adhesive jointing, the waterproof layer is clamped between the protective covers, the inner cylindrical surface of the protective cover is inserted and attached to the outer cylindrical surface of the protective layer, and the side of the waterproof layer, which is away from the shock-absorbing rubber, is attached to one end of the wire.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a kind of efficient flame-retardant polyvinyl chloride wire, with following beneficial effects:

[0015] 1、The efficient flame-retardant polyvinyl chloride wire, the aging degree of wire is reduced by the protective layer of wire outer layer, and the flame-retardant layer in the protective layer can effectively slow down the propagation speed of flame when high temperature or open fire is encountered, and when the outer layer is high temperature, the high-temperature-resistant layer protects the temperature of internal wire suitable, guaranteeing wire transmission good.

[0016] 2、The efficient flame-retardant polyvinyl chloride wire, the wire gap in wire insulation layer is filled with rubber, and the wire is fixed between insulation layer and filling layer to keep fixed, when wire is twisted and bent, wire follows bending but does not change position and is stirred together, and wire deformation degree is lower, guaranteeing long-term use performance of wire.

[0017] 3、The efficient flame-retardant polyvinyl chloride wire, protective cover structure is equipped with at both ends when wire is not used, protects wire cross section part exposed outside, prevents potential damage caused to exposed part by external environment, such as moisture, dust, chemical substances or mechanical impact. ACCURACY

[0018] Figure 1 It is structure schematic diagram of the utility model;

[0019] Figure 2 It is structure explosion schematic diagram of the utility model;

[0020] Figure 3 It is protective cover structure sectional view schematic diagram of the utility model;

[0021] Figure 4 for Figure 3 A local enlarged view of the structure of the flame-retardant layer in the figure;

[0022] Figure 5 A cross-sectional view of the flame-retardant layer structure of the utility model.

[0023] In the figure: 1, protective layer; 2, protective cover; 3, flame-retardant layer; 4, high-temperature-resistant layer; 5, polyvinyl chloride layer; 6, insulation layer; 7, waterproof layer; 8, shock-absorbing rubber; 9, filling layer; 10, wire; 11, flame-retardant layer one; 12, flame-retardant layer two; 13, flame-retardant layer three. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-5 A high-efficiency flame-retardant polyvinyl chloride wire includes a polyvinyl chloride layer 5, an insulation layer 6 and a wire 10. The wire 10 is connected to the insulation layer 6, the insulation layer 6 is connected to the polyvinyl chloride layer 5, the polyvinyl chloride layer 5 is connected to a flame-retardant structure, the flame-retardant structure is fixedly connected to the protective layer 1, and the wire 10 is connected to the protective cover structure at both ends of the outer surface of the protective layer 1.

[0026] Further, the gap between the insulation layer 6 and the wire 10 is filled with a filling layer 9. The material of the filling layer 9 is the same as that of the insulation layer 6. The filling layer 9 is a polypropylene material, which has excellent electrical insulation, light weight, heat resistance and chemical resistance and performs well in high-temperature and humidity environments.

[0027] Further, the flame-retardant structure includes a high-temperature-resistant layer 4. The inner cylindrical surface of the high-temperature-resistant layer 4 is connected to the outer cylindrical surface of the polyvinyl chloride layer 5. The high-temperature-resistant layer 4 is a silica gel material, which has excellent high-temperature resistance, with a working temperature range of usually-60°C to 200°C. Meanwhile, the silica gel material has good flexibility, aging resistance, and the polyvinyl chloride layer 5 is a polyvinyl chloride material, which has good flexibility, chemical resistance and wear resistance, and is low in cost and widely used in the insulation of low-voltage wire and cable.

[0028] Further, the fire-retardant structure further comprises a fireproof layer 3, the fireproof layer 3 is composed of a fire-retardant layer one 11, a fire-retardant layer two 12 and a fire-retardant layer three 13, the fire-retardant layer one 11 and the fire-retardant layer two 12 are integrally formed by hot pressing, the outer cylindrical surface of the fire-retardant layer one 11 and the fire-retardant layer two 12 is coated with the fire-retardant layer three 13, the side of the fire-retardant layer one 11 and the fire-retardant layer two 12 away from the fire-retardant layer three 13 is glued and connected to the side of the high-temperature-resistant layer 4 away from the polyvinyl chloride layer 5, the fire-retardant layer one 11 is a polyurethane material, the fire-retardant performance of the polyurethane is improved by adding a fire retardant (such as aluminum hydroxide, a bromine-based fire retardant, etc.), the fire-retardant layer two 12 is an aluminum hydroxide material, which decomposes and absorbs heat at high temperatures, releases water vapor, and reduces the temperature of combustible materials, the combination strength of the fire-retardant layer one 11 and the fire-retardant layer two 12 can be further improved by mixing them and using a hot pressing process, this method can enhance the mechanical properties and thermal stability of the fire-retardant material, the fire-retardant layer three 13 is a polytetrafluoroethylene material, which has excellent temperature resistance and electrical insulation, and can achieve excellent fire-retardant effect after treatment.

[0029] Further, the side of the fire-retardant layer three 13 away from the fire-retardant layer one 11 and the fire-retardant layer two 12 is glued and connected to the protective layer 1, the protective layer 1 is a thermoplastic polyurethane material, which has excellent flexibility, wear resistance and weather resistance, a wide temperature range, and can effectively prevent hardening.

[0030] Further, the protective cover structure comprises a protective cover 2, a waterproof layer 7 and a shock-absorbing rubber 8, the shock-absorbing rubber 8 is connected to one side of the protective cover 2 by planar clamping, the other side of the shock-absorbing rubber 8 is connected to the waterproof layer 7 by gluing, the waterproof layer 7 is clamped between the protective covers 2, the inner cylindrical surface of the protective cover 2 is inserted and attached to the outer cylindrical surface of the protective layer 1, and the side of the waterproof layer 7 away from the shock-absorbing rubber 8 is attached to one end of the wire 10, when external force acts on the shock-absorbing rubber 8, the shape of the shock-absorbing rubber 8 changes to absorb the applied energy, and when the external force is removed, the shock-absorbing rubber 8 can return to its original shape, effectively reducing the transmission of vibration, the waterproof layer 7 is closely attached to the wire 10 and the protective layer 1, which can block water vapor and dust from penetrating.

[0031] Working principle: when the wire is not in use, the protective cover 2 is placed on the wire section, the waterproof layer 7 prevents water vapor and dust from penetrating into the protective cover 2, thereby affecting the performance of the wire, when the wire section is pressed or impacted, the shock-absorbing rubber 8 can resist pressure and shock absorption, when the wire is in use, the protective cover 2 is removed, the wire may need to be bent and twisted during wiring, the filler layer 9 fixes the wire 10 between the insulating layer 6 and the filler layer 9 to keep it fixed, the wire 10 does not deform greatly, the wire 10 will harden after frequent deformation, affecting wiring and use, when the wire encounters high temperature or open flame, the fireproof layer 3 has the characteristic of not easily burning, which can effectively slow down the propagation speed of the flame, when the fireproof layer 3 is at high temperature, the high-temperature-resistant layer 4 protects the internal wire at a suitable temperature, ensuring good transmission of the wire.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high efficiency flame retardant polyvinyl chloride wire comprising a polyvinyl chloride layer (5), an insulation layer (6) and a conductor wire (10), the conductor wire (10) is connected to the insulation layer (6) by sheathing, the insulation layer (6) is connected to the polyvinyl chloride layer (5) by sheathing, characterized in that: The polyvinyl chloride layer (5) is sleeved with a flame-retardant structure, the flame-retardant structure is fixedly connected with a protective layer (1), the wire (10) is insertedly connected with a protective cover structure at both ends of the outer surface of the protective layer (1), the flame-retardant structure comprises a high-temperature-resistant layer (4), the inner cylindrical surface of the high-temperature-resistant layer (4) is sleeved with the outer cylindrical surface of the polyvinyl chloride layer (5), the flame-retardant structure further comprises a fireproof layer (3), the fireproof layer (3) is composed of a flame-retardant layer one (11), a flame-retardant layer two (12) and a flame-retardant layer three (13), the flame-retardant layer one (11) and the flame-retardant layer two (12) are integrally formed by hot pressing, the outer cylindrical surface of the flame-retardant layer one (11) and the flame-retardant layer two (12) is coated with the flame-retardant layer three (13), one side of the flame-retardant layer one (11) and the flame-retardant layer two (12) away from the flame-retardant layer three (13) is glued and sleeved with one side of the high-temperature-resistant layer (4) away from the polyvinyl chloride layer (5), the protective cover structure comprises a protective cover (2), a waterproof layer (7) and a damping rubber (8), the inner surface of the protective cover (2) is clamped with one side of the damping rubber (8), the other side of the damping rubber (8) is bonded with the waterproof layer (7), the waterproof layer (7) is clamped between the protective cover (2), the inner cylindrical surface of the protective cover (2) is insertedly attached with the outer cylindrical surface of the protective layer (1), and one side of the waterproof layer (7) away from the damping rubber (8) is attached with one end of the wire (10). ​ 2. The high efficiency flame retardant polyvinyl chloride wire according to claim 1, characterized in that: The gap between the insulating layer (6) and the wire (10) is filled with a filling layer (9).

3. The high efficiency flame retardant polyvinyl chloride wire according to claim 1, characterized in that: The flame-retardant layer three (13) away from one side of the flame-retardant layer one (11) and the flame-retardant layer two (12) is glued and sleeved with the protective layer (1).

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