High-flame-retardant insulated wire and cable

Abstract

The utility model belongs to the technical field of wires and cables, and particularly relates to a high-flame-retardant insulated wire and cable, which comprises a cable core, a shielding layer fixedly connected to the outer wall of the cable core, a first filling layer fixedly connected to the outer wall of the shielding layer, a first tensile wire fixedly connected to the inside of the first filling layer, and a second tensile wire fixedly connected to the outside of the first filling layer. The outer wall of the first filling layer is fixedly connected with a first flame-retardant layer, the outer wall of the first flame-retardant layer is fixedly connected with a second filling layer, and the interior of the second filling layer is fixedly connected with a second tensile wire. According to the utility model, through the design of the first tensile wire and the second tensile wire, the effect of preventing the cable from being torn is achieved, inert gas is injected into the cavity through the one-way valve, the effect of slowing down flame burning of the cable under the condition of a fire disaster is achieved, and through the design of the first flame-retardant layer and the second flame-retardant layer, the fireproof effect is further enhanced; and through the design of the wear-resistant layer and the waterproof coating, the effect of prolonging the service life of the cable is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to a highly flame-retardant insulated wire and cable. Background Art

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. The entire outer surface of the cable is covered with a highly insulating covering layer, which has the characteristics of internal power conduction and external insulation.

[0003] After searching, a patent with publication number CN216084388U discloses a highly flame retardant insulated wire and cable, which relates to the field of cable insulation technology, including a cable body, an outer wall of the cable body is provided with a wear layer, and an air-tight layer is provided inside the wear layer, a plurality of groups of cable layers are provided inside the air-tight layer, and an inert gas is provided between the outer walls of the plurality of groups of cable layers and the inner wall of the air-tight layer. The utility model achieves the effect of isolating the fire source through a wear layer, an airtight layer, a cable layer, an inert gas, etc. When the cable body is in a fire environment, the wear layer first isolates the external fire source and effectively protects other protective layers inside the cable body. When the fire source passes through the wear layer, the airtight layer performs a second layer of isolation on the fire source, and the isolation of the airtight layer further prevents the invasion of the fire source. When the fire source passes through the airtight layer, the cable layer performs a third layer of isolation on the fire source. At the same time, the airtight layer begins to leak, and the leaked inert gas has a certain flame retardant effect on the fire source. In this patent, only inert gas is used to achieve flame retardancy. When the fire source is large, the flame retardant performance of the inert gas is not very good. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a highly flame-retardant insulated wire and cable, which solves the current problem of poor flame-retardant performance.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a highly flame-retardant insulated wire and cable, comprising a cable core, the outer wall of the cable core is fixedly connected with a shielding layer, the outer wall of the shielding layer is fixedly connected with a first filling layer, the interior of the first filling layer is fixedly connected with a first anti-drawing wire, the outer wall of the first filling layer is fixedly connected with a first flame-retardant layer, the outer wall of the first flame-retardant layer is fixedly connected with a second filling layer, the interior of the second filling layer is fixedly connected with a second anti-drawing wire, the outer wall of the second filling layer is fixedly connected with a fastening layer, the outer wall of the fastening layer is fixedly connected with a first insulating layer, the outer wall of the first insulating layer is fixedly connected with a partition layer, a cavity is opened inside the partition layer, the outer wall of the partition layer is fixedly connected with a second flame-retardant layer, the outer wall of the second flame-retardant layer is fixedly connected with a wear-resistant layer, the outer wall of the wear-resistant layer is fixedly connected with a second insulating layer, the outer wall of the second insulating layer is fixedly connected with a waterproof coating, one end of the partition layer is fixedly connected with a one-way valve, and the inner wall of the cavity is filled with an inert gas.

[0006] As a preferred technical solution of the utility model, the material of the first filling layer is glass fiber, and the material of the second filling layer is polypropylene imine fiber.

[0007] As a preferred technical solution of the utility model, the material of the first flame retardant layer is nano aerogel, and the material of the second flame retardant layer is cross-linked polyethylene.

[0008] As a preferred technical solution of the utility model, the material of the fastening layer is rubber.

[0009] As a preferred technical solution of the utility model, the material of the first insulating layer is silicone rubber, and the material of the second insulating layer is vinyl acetate copolymer.

[0010] As a preferred technical solution of the utility model, the material of the wear-resistant layer is polyurethane.

[0011] As a preferred technical solution of the utility model, the material of the waterproof coating is an acrylic coating.

[0012] Compared with the prior art, the utility model provides a highly flame-retardant insulated wire and cable, which has the following beneficial effects:

[0013] 1. This highly flame-retardant insulated wire and cable achieves the effect of preventing cable tearing through the design of the first anti-drawing wire and the second anti-drawing wire, injects inert gas into the cavity through a one-way valve, achieves the effect of slowing down the flame burning the cable in the event of a fire, further enhances the flame retardant effect through the design of the first flame retardant layer and the second flame retardant layer, and extends the service life of the cable through the design of the wear-resistant layer and the waterproof coating.

[0014] 2. This highly flame-retardant insulated wire and cable achieves the effect of enhancing the mechanical strength of the cable through the design of the first filling layer and the second filling layer, and further enhances the flame retardancy of the cable. The design of the first insulating layer and the second insulating layer achieves the effect of further enhancing the insulation of the cable, and enhances the corrosion resistance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the structure of the utility model;

[0018] Figure 4 for Figure 3 A is an enlarged schematic diagram.

[0019] In the figure: 1. cable core; 2. shielding layer; 3. first filling layer; 4. first anti-drawing wire; 5. first flame retardant layer; 6. second filling layer; 7. second anti-drawing wire; 8. fastening layer; 9. first insulating layer; 10. cavity; 11. second flame retardant layer; 12. wear-resistant layer; 13. second insulating layer; 14. waterproof coating; 15. one-way valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1-4In the present embodiment: a highly flame-retardant insulated wire and cable comprises a cable core 1, the outer wall of the cable core 1 is fixedly connected with a shielding layer 2, the outer wall of the shielding layer 2 is fixedly connected with a first filling layer 3, the interior of the first filling layer 3 is fixedly connected with a first anti-drawing wire 4, the outer wall of the first filling layer 3 is fixedly connected with a first flame-retardant layer 5, the outer wall of the first flame-retardant layer 5 is fixedly connected with a second filling layer 6, the interior of the second filling layer 6 is fixedly connected with a second anti-drawing wire 7, the outer wall of the second filling layer 6 is fixedly connected with a fastening layer 8, the outer wall of the fastening layer 8 is fixedly connected with a first insulating layer 9, the outer wall of the first insulating layer 9 is fixedly connected with a partition layer, a cavity 10 is opened inside the partition layer, the outer wall of the partition layer is fixedly connected with a second flame-retardant layer 11, the outer wall of the second flame-retardant layer 11 is fixedly connected with a wear-resistant layer 12, the outer wall of the wear-resistant layer 12 is fixedly connected with a second insulating layer 13, the outer wall of the second insulating layer 13 is fixedly connected with a waterproof coating 14, one end of the partition layer is fixedly connected with a one-way valve 15, and the inner wall of the cavity 10 is filled with an inert gas.

[0023] As a preferred embodiment, the design of the first anti-drawing wire 4 and the second anti-drawing wire 7 can prevent the cable from tearing, and the inert gas is injected into the cavity 10 through the one-way valve 15, so as to reduce the flame burning the cable in the event of a fire. The design of the first flame retardant layer 5 and the second flame retardant layer 11 can further enhance the fire prevention effect, and the design of the wear-resistant layer 12 and the waterproof coating 14 can extend the service life of the cable.

[0024] Embodiment 2

[0025] See also Figure 1-4 In this implementation scheme:

[0026] As a preferred embodiment, the material of the first filling layer 3 is glass fiber, which has extremely high flame retardancy and thermal stability, and does not cause the generation of smoke and toxic gases. In addition, glass fiber can also enhance the mechanical strength of wires and cables. The material of the second filling layer 6 is polypropylene imide fiber, which has excellent flame retardancy, low smoke and low toxicity, and has a good enhancement effect on the mechanical properties of cables. The material of the first flame retardant layer 5 is nano aerogel, which has a fine nano network structure of silicon aerogel, which effectively limits the propagation of local thermal excitation, and its solid thermal conductivity is 2-3 orders of magnitude lower than that of the corresponding glassy material. Nano micropores inhibit the contribution of gas molecules to heat conduction. The refractive index of silicon aerogel is close to 1, and the ratio of the annihilation coefficient of infrared and visible light is more than 100, which can effectively transmit sunlight and prevent infrared heat radiation at ambient temperature. The material of the second flame retardant layer 11 is cross-linked polyethylene, which has high heat resistance and can withstand temperatures as high as 250 degrees Celsius when short-circuited. Good electrical performance and wear resistance, as well as anti-aging and environmental protection, the material of the fastening layer 8 is rubber, the material of the first insulating layer 9 is silicone rubber, silicone rubber has high temperature resistance, good flexibility and aging resistance, and has excellent electrical insulation performance, the material of the second insulating layer 13 is vinyl acetate copolymer, vinyl acetate copolymer has strong corrosion resistance, is not easy to age, has good wear resistance, and can be used for a long time under various environmental conditions, the material of the wear-resistant layer 12 is polyurethane, polyurethane has extremely high wear resistance and tear strength, maintains softness, and will not harden or become brittle even at extremely low temperatures. In addition, polyurethane has good flame retardancy and oil resistance, and the material of the waterproof coating 14 is acrylic coating, which not only has good waterproof performance, but also has significant advantages in preventing cable aging and fading caused by ultraviolet rays. The acrylic paint film has good toughness and can resist mechanical shock and external environment.

[0027] The working principle and use process of the utility model: after the cable is laid, the cavity 10 is filled with inert gas through the one-way valve 15, and the laying work of the cable is completed. At this time, the use of the device is completed. The design of the first anti-drawing wire 4 and the second anti-drawing wire 7 can make the cable's tear resistance better, the design of the first flame retardant layer 5 and the second flame retardant layer 11 can make the cable's flame retardancy better, and the design of the wear-resistant layer 12 and the waterproof coating 14 can extend the cable's service life.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A highly flame-retardant insulated wire and cable, comprising a cable core (1), characterized in that: The outer wall of the cable core (1) is fixedly connected to a shielding layer (2), the outer wall of the shielding layer (2) is fixedly connected to a first filling layer (3), the interior of the first filling layer (3) is fixedly connected to a first anti-drawing wire (4), the outer wall of the first filling layer (3) is fixedly connected to a first flame retardant layer (5), the outer wall of the first flame retardant layer (5) is fixedly connected to a second filling layer (6), the interior of the second filling layer (6) is fixedly connected to a second anti-drawing wire (7), the outer wall of the second filling layer (6) is fixedly connected to a fastening layer (8), and the outer wall of the fastening layer (8) is fixedly connected to a first flame retardant layer (5). A first insulating layer (9) is connected, the outer wall of the first insulating layer (9) is fixedly connected to a partition layer, a cavity (10) is provided inside the partition layer, the outer wall of the partition layer is fixedly connected to a second flame retardant layer (11), the outer wall of the second flame retardant layer (11) is fixedly connected to a wear-resistant layer (12), the outer wall of the wear-resistant layer (12) is fixedly connected to a second insulating layer (13), the outer wall of the second insulating layer (13) is fixedly connected to a waterproof coating (14), one end of the partition layer is fixedly connected to a one-way valve (15), and the inner wall of the cavity (10) is filled with an inert gas.

2. A highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the first filling layer (3) is glass fiber, and the material of the second filling layer (6) is polypropylene imide fiber.

3. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the first flame retardant layer (5) is nano aerogel, and the material of the second flame retardant layer (11) is cross-linked polyethylene.

4. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the fastening layer (8) is rubber.

5. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the first insulating layer (9) is silicone rubber, and the material of the second insulating layer (13) is vinyl acetate copolymer.

6. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the wear-resistant layer (12) is polyurethane.

7. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the waterproof coating (14) is an acrylic coating.

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