High-flame-retardant polyvinyl chloride insulated wire

Abstract

The utility model discloses a high flame retardation polyvinyl chloride insulation wire comprising a conductive protection assembly comprising a conductor main body; the high flame retardant component comprises a polyvinyl chloride insulating layer and an oxygen barrier layer; a polyvinyl chloride insulating layer is arranged outside the conductor main body, an oxygen barrier layer is arranged between the conductor main body and the polyvinyl chloride insulating layer, the middle part of the oxygen barrier layer is uniformly filled with magnesium hydroxide particles, and four fireproof grooves are formed in one side, close to the conductor main body, of the polyvinyl chloride insulating layer. According to the utility model, the oxygen barrier layer is filled with magnesium hydroxide particles, so that the contact between oxygen and combustible materials can be reduced, and the fire resistance of the wire is improved; the fireproof grooves can reduce the speed and the amount of heat transferred into the wire, and can discharge gas generated by combustion, so that the possibility of explosion is reduced; and the overall mass of the wire is reduced through the arrangement of the overall structure, subsequent transportation and installation are facilitated, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyvinyl chloride insulated wires, in particular to a highly flame-retardant polyvinyl chloride insulated wire. Background Technique

[0002] A polyvinyl chloride insulated wire is a wire with polyvinyl chloride (PVC) as the insulating material wrapping the conductor. The polyvinyl chloride insulated wire has the following advantages: relatively low cost (the polyvinyl chloride material is relatively economical, making the production cost of the wire relatively low), good insulation performance (can effectively prevent current leakage and ensure electrical safety), chemical corrosion resistance (has a certain resistance to general chemical substances and adapts to different environments), and relatively good mechanical properties (has certain flexibility and wear resistance, facilitating installation and use).

[0003] For existing polyvinyl chloride insulated wires to maintain good flame-retardant performance, multiple layers of fireproof materials are usually installed inside the wires. Although it can achieve good flame retardancy, the setting of multiple layers of fireproof materials increases the overall mass of the wires, making installation and transportation inconvenient; at the same time, it increases the production cost. Therefore, a structure with simple flame-retardant and anti-flame properties is needed to reduce the overall mass of the wires and achieve the effect of saving production costs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a highly flame-retardant polyvinyl chloride insulated wire to solve the problems mentioned in the above background technique, that is, for existing polyvinyl chloride insulated wires to maintain good flame-retardant performance, multiple layers of fireproof materials are usually installed inside the wires. Although it can achieve good flame retardancy, the setting of multiple layers of fireproof materials increases the overall mass of the wires, making installation and transportation inconvenient; at the same time, it increases the production cost.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a highly flame-retardant polyvinyl chloride insulated wire, including:

[0007] A conductive protection component, and the conductive protection component includes a conductor main body;

[0008] A highly flame-retardant component, and the highly flame-retardant component includes a polyvinyl chloride insulating layer and an oxygen isolation layer;

[0009] The polyvinyl chloride insulating layer is arranged outside the conductor main body, and an oxygen isolation layer is arranged between the conductor main body and the polyvinyl chloride insulating layer, and magnesium hydroxide particles are evenly filled in the middle of the oxygen isolation layer.

[0010] Furthermore, the highly flame-retardant component further includes a fireproof groove;

[0011] Four fire slots are provided on the side of the PVC insulating layer close to the conductor body.

[0012] Furthermore, the conductive protection component further includes a steel wire braided layer;

[0013] A steel wire braided layer is provided outside the PVC insulating layer.

[0014] Furthermore, a strong insulation component is further included;

[0015] The strong insulation component includes a semi-conductive insulation shielding layer;

[0016] The semi-conductive insulation shielding layer is fitted and installed on the outside of the conductor body, and is used in cooperation with the PVC insulating layer.

[0017] Furthermore, the strong insulation component further includes a first serrated insulation structure;

[0018] A first serrated insulation structure is provided on the side of the semi-conductive insulation shielding layer close to the conductor body.

[0019] Furthermore, the strong insulation component further includes a second serrated insulation structure;

[0020] A second serrated insulation structure is provided on the outside of the PVC insulating layer.

[0021] Compared with the prior art, the advantages of the present utility model are as follows:

[0022] In the present utility model, the oxygen isolation layer is filled with magnesium hydroxide particles, which can absorb the heat in the surrounding air, thereby reducing the temperature of the wire. At the same time, the metal oxide shell after the reaction of the magnesium hydroxide particles can play a role in isolating oxygen, reducing the contact between oxygen and combustible materials, and inhibiting the progress of combustion, thereby increasing the fire resistance of the wire; if a fire accidentally occurs outside, the fire slots provided on the PVC insulating layer can reduce the speed and amount of heat transfer to the inside of the wire, delaying the process of the internal insulating material and the conductor being heated and rising in temperature, thereby gaining time for rescue and circuit cutting. At the same time, the fire slots can discharge the gases generated by combustion, reduce the accumulation of internal pressure, and reduce the possibility of explosion; and the whole has only one oxygen isolation layer, and the opening of the fire slots reduces the mass of the PVC insulating layer, and thus reduces the overall mass of the wire, which is not only convenient for subsequent transportation and installation, but also saves production costs.

[0023] Based on the above beneficial effects, the first serrated insulation structure is provided on the side of the semiconductive insulation shielding layer close to the conductor body, which can improve the electric field distribution near the conductor body from the source, reduce the electric field concentration. At the same time, the second serrated insulation structure is provided on the outer side of the polyvinyl chloride insulation layer, increasing the creepage distance on its surface and reducing the risk of surface discharge. The combined use of the two serrated insulation structures greatly improves the insulation performance of the wire and ensures the safety of wire use. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is the overall schematic diagram of the present invention;

[0026] Figure 2 is the sectional view of the present invention.

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 101, conductor body; 102, steel wire braided layer;

[0029] 201, polyvinyl chloride insulation layer; 202, oxygen barrier layer; 203, fire groove;

[0030] 301, semiconductive insulation shielding layer; 302, first serrated insulation structure; 303, second serrated insulation structure. Detailed Embodiments

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention with reference to the drawings.

[0032] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the drawings.

[0034] Please refer to Figure 1-2As shown in the figure, this embodiment is a highly flame-retardant polyvinyl chloride insulated wire, including:

[0035] A conductive protection component, which includes a conductor main body 101;

[0036] A highly flame-retardant component, which includes a polyvinyl chloride insulation layer 201 and an oxygen isolation layer 202;

[0037] The conductor main body 101 is externally provided with a polyvinyl chloride insulation layer 201, and an oxygen isolation layer 202 is provided between the conductor main body 101 and the polyvinyl chloride insulation layer 201. Magnesium hydroxide particles are evenly filled in the middle of the oxygen isolation layer 202;

[0038] The polyvinyl chloride insulation layer 201 is used for insulation. The magnesium hydroxide particles filled in the middle of the oxygen isolation layer 202 can absorb the heat in the surrounding air, thereby reducing the temperature of the wire. At the same time, the metal oxide shell after the reaction of the magnesium hydroxide particles can play a role in isolating oxygen, reducing the contact between oxygen and combustible materials, inhibiting the progress of combustion, and thus increasing the fire resistance of the wire;

[0039] The highly flame-retardant component further includes a fire groove 203;

[0040] Four fire grooves 203 are opened on the side of the polyvinyl chloride insulation layer 201 close to the conductor main body 101;

[0041] The fire groove 203 can slow down the heat transfer speed and ensure the circulation of the gas after combustion, avoiding gas accumulation;

[0042] The conductive protection component further includes a steel wire braided layer 102;

[0043] The polyvinyl chloride insulation layer 201 is externally provided with a steel wire braided layer 102;

[0044] The setting of the steel wire braided layer 102 increases the overall hardness of the wire, avoids cracking and damage, and delays the service life of the wire;

[0045] It further includes a strong insulation component;

[0046] The strong insulation component includes a semi-conductive insulation shielding layer 301;

[0047] The semi-conductive insulation shielding layer 301 is attached and installed on the outside of the conductor main body 101 and is used in cooperation with the polyvinyl chloride insulation layer 201;

[0048] The setting of the semi-conductive insulation shielding layer 301 can improve the electric field distribution on the surface of the conductor main body 101, avoid the electric field concentrating on the sharp corners, burrs and other irregularities of the conductor, thereby reducing the possibility of partial discharge and improving the insulation performance and service life of the wire;

[0049] The strong insulation component further includes a first serrated insulation structure 302;

[0050] A first serrated insulation structure 302 is provided on the side of the semiconductive insulation shielding layer 301 close to the conductor body 101;

[0051] The setting of the first serrated insulation structure 302 can improve the electric field distribution near the conductor body 101 from the source and reduce the electric field concentration;

[0052] The strong insulation component further includes a second serrated insulation structure 303;

[0053] A second serrated insulation structure 303 is provided on the outer side of the polyvinyl chloride insulation layer 201;

[0054] The setting of the second serrated insulation structure 303 increases the creepage distance on its surface and reduces the risk of surface discharge;

[0055] Working principle: When the external heat rises, the magnesium hydroxide particles filled in the middle of the oxygen isolation layer 202 can absorb and neutralize the heat in the surrounding air. Subsequently, the magnesium hydroxide particles react to generate metal oxides to isolate oxygen. In case of accidental fire, the combustion-generated gas is discharged to both ends through the fire prevention groove 203. The polyvinyl chloride insulation layer 201 and the semiconductive insulation shielding layer 301 are used to reduce partial discharge. The first serrated insulation structure 302 and the second serrated insulation structure 303 can disperse the electric field and reduce the local electric field strength;

[0056] This step increases the flame retardant performance while reducing the overall mass of the wire, and greatly improves the insulation of the wire, ensuring the safety of wire use.

[0057] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0058] 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 on some of the technical features. Any modification, equivalent replacement, improvement, 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 highly flame-retardant polyvinyl chloride insulated wire, characterized in that: include: A conductive protection component, the conductive protection component comprising a conductor body (101); A highly flame-retardant component, comprising a polyvinyl chloride insulation layer (201) and an oxygen barrier layer (202); A polyvinyl chloride insulation layer (201) is provided outside the conductor body (101), an oxygen isolation layer (202) is provided between the conductor body (101) and the polyvinyl chloride insulation layer (201), and magnesium hydroxide particles are uniformly filled in the middle of the oxygen isolation layer (202).

2. A highly flame-retardant polyvinyl chloride insulated wire according to claim 1, characterized in that: The highly flame-retardant component further comprises a fireproof groove (203); Four fireproof grooves (203) are provided on a side of the polyvinyl chloride insulation layer (201) close to the conductor body (101).

3. A highly flame-retardant polyvinyl chloride insulated wire according to claim 1, characterized in that: The conductive protection assembly also includes a steel wire braided layer (102); A steel wire braided layer (102) is provided outside the polyvinyl chloride insulation layer (201).

4. A highly flame-retardant polyvinyl chloride insulated wire according to claim 1, characterized in that: Also included are strong insulation components; The strong insulation component comprises a semi-conductive insulation shielding layer (301); A semi-conductive insulating shielding layer (301) is fitted onto the outer side of the conductor body (101), and the semi-conductive insulating shielding layer (301) is used in conjunction with the polyvinyl chloride insulating layer (201).

5. A highly flame-retardant polyvinyl chloride insulated wire according to claim 4, characterized in that: The strong insulation component also includes a first sawtooth insulation structure (302); The semi-conductive insulating shielding layer (301) has a first sawtooth insulating structure (302) formed on a side close to the conductor body (101).

6. A highly flame-retardant polyvinyl chloride insulated wire according to claim 4, characterized in that: The strong insulation component also includes a second sawtooth insulation structure (303); A second sawtooth-shaped insulation structure (303) is provided outside the polyvinyl chloride insulation layer (201).

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