Extrusion-resistant flame-retardant electric tracing band

Abstract

The utility model discloses an extrusion-resistant flame-retardant electric tracing band, which relates to the technical field of electric tracing bands and comprises an outer surface layer, a central block is mounted on the inner side of the outer surface layer, a hollow groove is arranged between the central block and the outer surface layer, a plurality of pressure-resistant blocks are mounted in the hollow groove, cable main bodies are fixedly connected to two sides of the central block, and the cable main bodies are fixedly connected to two ends of the central block. The electric tracing band provided by the utility model has a multi-layer protection design when resisting extrusion and fire behavior, the high-elasticity elastic columns and the supporting elastic sheets buffer external pressure and protect an internal structure together when encountering extrusion, the polyenyne layer forms a carbonization layer to isolate oxygen when encountering fire behavior, and flame retardants of the wear-resistant layer and the base layer enhance stability and prevent fire behavior from expanding, so that the service life of the electric tracing band is prolonged. The multi-layer flame-retardant design ensures the safety of the electric tracing band under extreme conditions, even if the outer layer is damaged, the polyenyne layer can still play a role, the wear-resistant layer can prolong the service life of the electric tracing band, and the flame-retardant effect is prevented from being weakened due to wear.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tracing tapes, in particular to a crush-resistant and flame-retardant electric tracing tape. Background Art

[0002] An electric tracing tape is composed of a conductive polymer, two parallel metal wires and an insulating sheath. Its characteristic is that the conductive polymer has a very high positive temperature coefficient characteristic and is connected in parallel with each other. It can automatically adjust the output power according to the temperature change of the heated system, automatically limit the heating temperature, can be arbitrarily truncated or lengthened within a certain range, and allows multiple cross overlaps without the concern of high-temperature hot spots and burning.

[0003] For example, the electric tracing tape disclosed in Chinese Patent CN202488788U includes a pair of conductors and a sheath layer combined outside the pair of conductors. Each of the pair of conductors includes a carbon fiber bundle and an insulating coating outside the carbon fiber bundle. The sheath layer is a low-halogen polyolefin sheath layer.

[0004] However, in the prior art, when the electric tracing tape is squeezed, the internal wires may be exposed. This exposure of the wires will not only cause the electric tracing tape to lose its heat preservation effect, but also increase the risk factor. The exposed wires are likely to come into contact with surrounding objects, forming a short circuit or spark, thus causing a fire. If the flame-retardant performance of the electric tracing tape is poor, once a fire occurs, the fire will spread rapidly. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of poor flame-retardant performance and poor crush resistance in the prior art, and to propose a crush-resistant and flame-retardant electric tracing tape.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a crush-resistant and flame-retardant electric tracing tape, including an outer surface layer, a central block is installed inside the outer surface layer, a hollow groove is opened between the central block and the outer surface layer, a plurality of pressure-resistant blocks are installed inside the hollow groove, and cable bodies are fixedly connected to both sides of the central block;

[0007] The pressure-resistant block includes an elastic column, a first bonding block is fixedly connected to the top of the elastic column, a second bonding block is fixedly connected to the bottom of the elastic column, and a support elastic sheet is fixedly connected to the center of the inner cavity of the elastic column.

[0008] Preferably, the cable body includes a buffer layer, a central cable core is installed in the center inside the buffer layer, and a protective cable is wound around the outer surface of the central cable core.

[0009] Preferably, the inside of the buffer layer is filled with a heat-insulating layer, and a polytetrafluoroethylene layer is compound-connected to the outer surface of the heat-insulating layer.

[0010] Preferably, a fluoroplastic outer sheath is compounded and connected to the outer surface of the polytetrafluoroethylene layer. The outer surface of the fluoroplastic outer sheath is compounded and connected to the central block, and the top of the central block is compounded and connected to the bottom of the second bonding block.

[0011] Preferably, the outer layer includes a base layer, and a wear-resistant layer is compounded and connected to the top of the base layer.

[0012] Preferably, a polyene alkyne layer is compounded and connected to the bottom of the base layer, and the polyene alkyne layer is compounded and connected to the first bonding block.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0014] 1. In the present utility model, the electric heating tape has a multi-layer protection design when resisting extrusion and fire. When encountering extrusion, the highly elastic elastic columns and supporting elastic sheets jointly buffer the external pressure to protect the internal structure. When encountering fire, the polyene alkyne layer forms a carbonized layer to isolate oxygen, and the flame retardants in the wear-resistant layer and the base layer enhance stability to prevent the fire from spreading. The multi-layer flame retardant design ensures the safety of the electric heating tape in extreme situations. Even if the outer layer is damaged, the polyene alkyne layer can still continue to function, and the wear-resistant layer can also extend the service life of the electric heating tape and prevent the flame retardant effect from weakening due to wear.

[0015] 2. In the present utility model, due to the excellent chemical stability and corrosion resistance of the polytetrafluoroethylene layer, it can resist the erosion of strong acids, strong alkalis and organic solvents, keep the inside of the electric heating tape dry. The buffer layer is made of a soft elastic material to protect the central cable core from external impacts and damages. The protective cable wrapped outside the central cable core enhances the tensile strength and compressive performance of the electric heating tape to ensure stable operation. The heat insulation layer effectively blocks the influence of external high temperature and reduces the temperature of the central cable core. The fluoroplastic outer sheath provides the final protection, preventing chemical corrosion, high temperature damage and fire threats, enhancing wear resistance and weather resistance, and ensuring the long-term use of the electric heating tape in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a three-dimensional structural schematic diagram of a crush-resistant and flame-retardant electric heating tape proposed by the present utility model;

[0017] Figure 2 FIG. is a cross-sectional structural schematic diagram of the pressure-resistant block of a crush-resistant and flame-retardant electric heating tape proposed by the present utility model;

[0018] Figure 3 FIG. is a cross-sectional structural schematic diagram of the outer layer of a crush-resistant and flame-retardant electric heating tape proposed by the present utility model;

[0019] Figure 4 FIG. is a cross-sectional structural schematic diagram of the cable body of a crush-resistant and flame-retardant electric heating tape proposed by the present utility model.

[0020] Legend: 1. Outer surface layer; 11. Base layer; 12. Polyene alkyne layer; 13. Wear-resistant layer; 2. Hollow groove; 3. Pressure-resistant block; 31. Elastic column; 32. First adhesive block; 33. Second adhesive block; 34. Support elastic sheet; 4. Central block; 5. Cable main body; 51. Polytetrafluoroethylene layer; 52. Fluoroplastic outer sheath; 53. Buffer layer; 54. Central cable core; 55. Protective cable; 56. Heat insulation layer. Detailed implementation

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model in conjunction with the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Embodiment 1: As Figures 1 - 3 shown, the present utility model provides a crush-resistant and flame-retardant electric heating tape, including an outer surface layer 1, a central block 4 is installed inside the outer surface layer 1, a hollow groove 2 is opened between the central block 4 and the outer surface layer 1, a plurality of pressure-resistant blocks 3 are installed inside the hollow groove 2, and cable main bodies 5 are fixedly connected to both sides of the central block 4;

[0024] The pressure-resistant block 3 includes an elastic column 31, a first adhesive block 32 is fixedly connected to the top of the elastic column 31, a second adhesive block 33 is fixedly connected to the bottom of the elastic column 31, and a support elastic sheet 34 is fixedly connected to the center of the inner cavity of the elastic column 31. The outer surface layer 1 includes a base layer 11, and a wear-resistant layer 13 is compounded on the top of the base layer 11. A polyene alkyne layer 12 is compounded on the bottom of the base layer 11, and the polyene alkyne layer 12 is compounded with the first adhesive block 32.

[0025] Next, specifically describe the specific settings and functions of this embodiment. First, when the electric heating tape is squeezed, the elastic column 31 is usually made of a highly elastic material, such as rubber or polyurethane. When subjected to external pressure or extrusion, the elastic column 31 can play an elastic support role. This deformation enables the pressure-resistant block 3 to expand and contract inside the hollow groove 2, effectively buffering the direct impact of the external pressure on the internal structure.

[0026] At the same time, the addition of the support elastic sheet 34 further enhances the support effect. This is usually made of a thin and tough material, such as stainless steel or high-strength alloy. When encountering compression, the support elastic sheet 34 will undergo a small deformation and protect the interior from damage together with the elastic column 31.

[0027] When the fire spreads, the polyenyne layer 12 material has excellent flame retardant properties and can quickly form a dense char layer at high temperatures, thereby isolating oxygen and delaying the spread of the fire. At the same time, flame retardants are added to the wear-resistant layer 13 and the base layer 11 during the manufacturing process, enabling them to maintain a certain degree of stability in the face of a fire and preventing the situation of expansion and assisting combustion.

[0028] This multi-layer flame retardant design enables the electric heating cable to still maintain a certain degree of safety performance in extreme situations such as fires. Even if the outer layer material is damaged, the polyenyne layer 12 can still continue to function and prevent the fire from further spreading to the inside of the electric heating cable. In addition, the presence of the wear-resistant layer 13 can effectively extend the service life of the electric heating cable and prevent the loss of flame retardant effect due to wear during long-term use.

[0029] Example Two: As Figure 4 shown, the cable main body 5 includes a buffer layer 53. A central cable core 54 is installed at the center inside the buffer layer 53, and a protective cable 55 is wound around the outer surface of the central cable core 54. The inside of the buffer layer 53 is filled with a heat insulation layer 56, and a polytetrafluoroethylene layer 51 is compound-connected to the outer surface of the heat insulation layer 56. A fluoroplastic outer sheath 52 is compound-connected to the outer surface of the polytetrafluoroethylene layer 51, and the outer surface of the fluoroplastic outer sheath 52 is compound-connected to the central block 4. The top of the central block 4 is compound-connected to the bottom of the second bonding block 33.

[0030] The effect achieved by the entire example is that the polytetrafluoroethylene layer 51 of the cable main body 5 is known for its excellent chemical stability and corrosion resistance, and can effectively resist the erosion of various chemical substances, including strong acids, strong bases, and organic solvents. This characteristic enables the polytetrafluoroethylene layer 51 to keep the inside of the electric heating cable dry in a humid environment and prevent the internal auxiliary materials from being damaged or deteriorated due to moisture absorption.

[0031] Next, the main function of the buffer layer 53 is to protect the central cable core 54 from external impacts and mechanical damages. It is usually made of a soft and elastic material that can absorb and disperse external impact forces, thereby ensuring the integrity and stability of the central cable core 54. When the electric heating cable is subjected to external forces such as bending, stretching, or extrusion, the buffer layer 53 can effectively protect the central cable core 54 and prevent it from being damaged.

[0032] One or more protective cables 55 are usually wrapped around the outer surface of the central cable core 54. These protective cables 55 are made of high-strength and corrosion-resistant materials, which can prevent the central cable core 54 from being worn, corroded, or damaged. In addition, the protective cables 55 can also enhance the tensile strength and compressive performance of the electric heating cable, ensuring that the electric heating cable can work stably in various harsh environments.

[0033] The heat insulation layer 56 is made of materials with good heat insulation performance, which can effectively prevent the influence of external high temperature on the central cable core 54. In a high-temperature environment, it can slow down the heat transfer speed to the central cable core 54, reduce the temperature of the central cable core 54, and thus protect it from high-temperature damage.

[0034] Finally, the fluoroplastic outer sheath 52 is the outermost protection of the electric heating cable. Fluoroplastics are widely used in the manufacturing field of electric heating cables due to their excellent corrosion resistance, high-temperature resistance, and flame retardancy. The fluoroplastic outer sheath 52 can effectively prevent the electric heating cable from being chemically corroded, damaged by high temperature, and threatened by fire. At the same time, it can also enhance the abrasion resistance and weather resistance of the electric heating cable, ensuring that the electric heating cable can maintain a long service life in various harsh environments.

[0035] The usage method and working principle of this device: When being squeezed, the elastic column 31 can play an elastic support role, enabling the pressure-resistant block 3 to perform telescopic adjustment inside the hollow groove 2. At the same time, the addition of the support elastic sheet 34 further enhances the support effect. When encountering external pressure, this design only causes the support elastic sheet 34 and the elastic column 31 to deform, without affecting the central cable core 54 and the protective cable 55 inside the cable body 5, ensuring the integrity and functionality of the electric heating cable structure.

[0036] When encountering a fire, the polyenyne layer 12 can effectively delay the spread of the fire. At the same time, flame retardants are added to the wear-resistant layer 13 and the base layer 11 during the manufacturing process. Therefore, when encountering a fire, although they may be damaged to a certain extent, they will not contribute to the expansion of the fire. The presence of the polyenyne layer 12 further enhances the flame retardant effect. In addition, the design of the wear-resistant layer 13 can resist the wear during long-term use, preventing the base layer 11 and the polyenyne layer 12 from losing their flame retardant performance due to wear.

[0037] The polytetrafluoroethylene layer 51 inside the cable body 5 has an anti-corrosion function, which can prevent the corrosion and damage caused by a humid environment to the inside of the electric heating cable. At the same time, the buffer layer 53 further protects the central cable core 54, reducing the impact of external shocks on it. The protective cable 55 is located outside the central cable core 54, providing additional protection. The cooperation of the heat insulation layer 56 and the fluoroplastic outer sheath 52 not only enhances the fire resistance of the electric heating cable but also effectively prevents the influence of high temperature on the central cable core 54, ensuring its normal operation.

[0038] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An extrusion-resistant flame-retardant electric heating cable, comprising an outer layer (1), a center block (4) being installed inside the outer layer (1), characterized in that: A hollow groove (2) is provided between the central block (4) and the outer surface layer (1), a plurality of pressure-resistant blocks (3) are installed inside the hollow groove (2), and a cable body (5) is fixedly connected to both sides of the central block (4); The pressure-resistant block (3) comprises an elastic column (31), the top of the elastic column (31) is fixedly connected to a first adhesive block (32), the bottom of the elastic column (31) is fixedly connected to a second adhesive block (33), and the center of the inner cavity of the elastic column (31) is fixedly connected to a supporting elastic sheet (34).

2. The extrusion-resistant flame-retardant electric heating cable according to claim 1, characterized in that: The cable body (5) comprises a buffer layer (53), a central cable core (54) is installed at the center of the inner side of the buffer layer (53), and a protective cable (55) is wound around the outer surface of the central cable core (54).

3. The extrusion-resistant flame-retardant electric heating cable according to claim 2, characterized in that: The inner side of the buffer layer (53) is filled with a heat insulation layer (56), and the outer surface of the heat insulation layer (56) is compositely connected with a polytetrafluoroethylene layer (51).

4. The extrusion-resistant flame-retardant electric heating cable according to claim 3, characterized in that: The outer surface of the polytetrafluoroethylene layer (51) is compositely connected with a fluoroplastic outer sheath (52), the outer surface of the fluoroplastic outer sheath (52) is compositely connected with the central block (4), and the top of the central block (4) is compositely connected with the bottom of the second bonding block (33).

5. The extrusion-resistant flame-retardant electric heating cable according to claim 1, characterized in that: The outer surface layer (1) comprises a base layer (11), and a wear-resistant layer (13) is compositely connected to the top of the base layer (11).

6. The extrusion-resistant flame-retardant electric heating cable according to claim 5, characterized in that: The bottom of the base layer (11) is compositely connected with a polyolefin layer (12), and the polyolefin layer (12) is compositely connected with the first bonding block (32).

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