A three-core power cord with a heat-resistant, flame-retardant, fireproof coating

Abstract

The utility model discloses a kind of three-core power cord of heat-resistant flame-retardant fireproof coating, specifically related to power cord technical field, including power cord, the inside of the power cord is equipped with three copper wires, the inside of the power cord is filled with filler, the power cord includes flame-retardant layer, the outside of the flame-retardant layer is equipped with heat-resistant layer, the outside of the heat-resistant layer is equipped with fireproof layer, the outside of the fireproof layer is equipped with waterproof layer, the outside of the waterproof layer is equipped with wear layer, the flame-retardant layer is made of flame-retardant polyvinyl chloride material, the heat-resistant layer is made of crosslinking polyethylene material, the fireproof layer is the fireproof coating formed by expansion type fireproof paint smearing on heat-resistant layer surface.The utility model can make power cord have flame retardancy by setting flame-retardant layer, prolong the service life of power cord, still by waterproof layer can seal power cord, avoid external moisture to enter power cord inside, prolong the service life of power cord.

Description

Technical Field

[0001] This utility model relates to the field of power cord technology, specifically to a three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating. Background Technology

[0002] Power cords are wires that transmit current. The current is usually transmitted point-to-point. Power cords can be divided into AC power cords and DC power cords according to their uses. AC power cords are usually wires that carry higher voltage alternating current. Because of the higher voltage, these wires need to be standardized and obtain safety certification before they can be officially produced. The three-core power cords of existing household appliances are generally composed of three identical copper core wires and an outer insulating layer.

[0003] For example, Chinese patent application No. 202121307088.3 discloses a three-core plastic power cord, including a power plug. One end of the power plug is connected to a power cord body, which is connected to an electrical device. The power cord body comprises a first copper core wire, a second copper core wire, an alloy core wire, a filling layer, an insulation layer, a reinforcing layer, and a corrosion-resistant and wear-resistant layer. The corrosion-resistant and wear-resistant layer covers the outer surface of the reinforcing layer. The outer surfaces of the first copper core wire, the second copper core wire, and the alloy core wire are all covered with an insulating sleeve, and the outer surface of the insulating sleeve is provided with several raised strips arranged in a circular array. This technical solution can reduce the overall production cost of the power cord. Furthermore, the aluminum alloy core wire is lighter than the copper core wire, thus reducing the overall weight of the power cord. It can also improve the fire resistance and mechanical strength of the power cord, further enhancing the safety of its use.

[0004] However, the following problems still exist in this technical solution: the flame retardant ability is poor, and it is easy to cause short circuits in the event of a fire. Utility Model Content

[0005] The purpose of this invention is to provide a three-core power cord with a heat-resistant, flame-retardant, and fireproof coating. By setting a flame-retardant layer, the power cord can be made flame-retardant, extending its service life. Furthermore, the waterproof layer can seal the power cord, preventing external moisture from entering the power cord and extending its service life, thus solving the aforementioned shortcomings in the technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a three-core power cord with a heat-resistant, flame-retardant, and fireproof coating, comprising a power cord, wherein the power cord has three copper wires inside, the power cord is filled with a filler, the power cord includes a flame-retardant layer, a heat-resistant layer is provided outside the flame-retardant layer, a fireproof layer is provided outside the heat-resistant layer, a waterproof layer is provided outside the fireproof layer, and a wear-resistant layer is provided outside the waterproof layer. Preferably, the flame-retardant layer is made of flame-retardant polyvinyl chloride material to give the power cord flame-retardant properties.

[0007] Preferably, the heat-resistant layer is made of cross-linked polyethylene material to give the power cord heat resistance.

[0008] Preferably, the fireproof layer is a fireproof coating formed by applying an intumescent fireproof coating to the surface of the heat-resistant layer, used to protect the power cord from flame damage.

[0009] Preferably, the waterproof layer is a heat-shrink tubing to prevent moisture from entering.

[0010] Preferably, the wear-resistant layer is made of thermoplastic polyurethane material to increase the service life of the power cord.

[0011] Preferably, the filler is made of polypropylene mesh tear-off fiber and is used to fill the inside of the power cord.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. The flame-retardant layer in this utility model is made of flame-retardant polyvinyl chloride material. Flame-retardant polyvinyl chloride itself has flame-retardant properties. By adding flame retardants such as antimony trioxide, its flame-retardant rating can be significantly improved. By setting the flame-retardant layer, the power cord can be made flame-retardant, thus extending the service life of the power cord.

[0013] 2. The waterproof layer in this utility model is a heat shrink tubing, which is usually made of polyolefin material. The inner wall is coated with hot melt adhesive. When heated, the tubing shrinks radially, and at the same time, the hot melt adhesive on the inner wall melts, which can tightly wrap the power cord to form a solid seal, preventing external moisture from entering the inside of the power cord and extending the service life of the power cord. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a front view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the internal structure of the power cord of this utility model; Figure 4 This is a cross-sectional view of the filling material of this utility model; Figure 5 This is an exploded view of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Power cord, 2. Copper wire, 3. Filler; 101 Flame retardant layer, 102 Heat resistant layer, 103 Fireproof layer, 104 Waterproof layer, 105 Wear resistant layer. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-5 The diagram shows a three-core power cord with a heat-resistant, flame-retardant, and fireproof coating, comprising a power cord 1, three copper wires 2 inside the power cord 1, a filler 3 inside the power cord 1, a flame-retardant layer 101 outside the flame-retardant layer 101, a heat-resistant layer 102 outside the heat-resistant layer 102, a fireproof layer 103 outside the fireproof layer 103, a waterproof layer 104 outside the fireproof layer 103, and a wear-resistant layer 105 outside the waterproof layer 104. like Figure 3 As shown, the flame-retardant layer 101 is made of flame-retardant polyvinyl chloride material. In this utility model, flame-retardant polyvinyl chloride itself has flame retardancy. By adding flame retardants such as antimony trioxide, its flame retardancy level can be significantly improved. By setting the flame-retardant layer 101, the power cord 1 can be made flame-retardant, thus extending the service life of the power cord 1.

[0019] like Figure 3 As shown, the heat-resistant layer 102 is made of cross-linked polyethylene material. In this invention, the cross-linked polyethylene transforms the linear molecular structure into a three-dimensional network structure through irradiation or chemical methods, which can significantly improve its heat resistance to 90°C and withstand a high temperature of 250°C during a short circuit. By setting the heat-resistant layer 102, the power cord 1 can be made heat-resistant, thus extending the service life of the power cord 1.

[0020] like Figure 3 As shown, the fireproof layer 103 is a fireproof coating formed by applying an intumescent fireproof coating to the surface of the heat-resistant layer 102. When exposed to fire, the intumescent fireproof coating rapidly expands and foams, forming a porous carbonaceous layer tens or even hundreds of times thicker than its original thickness. This carbonaceous layer provides heat insulation and oxygen barrier properties, effectively protecting the internal wires and cables from flame damage for a certain period, such as 1-2 hours. By setting the fireproof layer 103, the power cord 1 gains fire resistance, extending its service life.

[0021] like Figure 3As shown, the waterproof layer 104 is a heat shrink tubing. In this utility model, the heat shrink tubing is usually made of polyolefin material and coated with hot melt adhesive on the inner wall. After heating, the tubing shrinks radially, and at the same time, the hot melt adhesive on the inner wall melts, which can tightly wrap the power cord 1 to form a solid seal, preventing external moisture from entering the interior of the power cord 1 and extending the service life of the power cord 1.

[0022] like Figure 3 As shown, the wear-resistant layer 105 is made of thermoplastic polyurethane material. The thermoplastic polyurethane of this invention is one of the top wear-resistant materials, with extremely high mechanical strength, elasticity, oil resistance, tear resistance and excellent wear resistance. It is soft to the touch but very durable. By setting the wear-resistant layer 105, the surface of the power cord 1 can be prevented from being damaged, thereby extending the service life of the power cord 1.

[0023] like Figure 3 As shown, the filler 3 is made of polypropylene mesh tear fiber. The polypropylene mesh tear fiber in this utility model is a bundle of parallel PP filaments, which are lightly bound in the transverse direction with very fine yarn. When in use, it can be easily "torn" to the required width, which can fill the gaps very evenly, ensuring that the power cord 1 has excellent roundness. The filling amount can be flexibly adjusted according to the size of the cable gaps, improving practicality.

[0024] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating, comprising a power cord (1), characterized in that: The power cord (1) has three copper wires (2) inside and is filled with filler (3). The power cord (1) includes a flame-retardant layer (101), a heat-resistant layer (102) is provided outside the flame-retardant layer (101), a fireproof layer (103) is provided outside the heat-resistant layer (102), a waterproof layer (104) is provided outside the fireproof layer (103), and a wear-resistant layer (105) is provided outside the waterproof layer (104).

2. The three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The flame-retardant layer (101) is made of flame-retardant polyvinyl chloride material.

3. The three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The heat-resistant layer (102) is made of cross-linked polyethylene material.

4. The three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The fireproof layer (103) is a fireproof coating formed by applying an intumescent fireproof coating to the surface of the heat-resistant layer (102).

5. A three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The waterproof layer (104) is a heat shrink tubing.

6. The three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The wear-resistant layer (105) is made of thermoplastic polyurethane material.

7. A three-core power cord with a heat-resistant, flame-retardant, and fire-retardant coating according to claim 1, characterized in that: The filler (3) is made of polypropylene mesh tear-off fiber.

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