Self-temperature-limiting heating tape

Abstract

The utility model relates to the technical field of snow melting and deicing, provides a self-temperature-limiting heating tape, and solves the problems that an existing heating tape for road surface ice melting does not have self-temperature-limiting protection and anti-skid functions and does not have flame retardant performance. Comprising a self-temperature-limiting heating tape body, and the self-temperature-limiting heating tape body comprises a metal conductor wire core, a self-temperature-limiting graphene conductive layer, a metal wire mesh shielding layer, an isolation layer and a sheath layer which are sequentially arranged from inside to outside; the number of the metal conductor wire cores is at least two. An insulating filling material is arranged between the self-temperature-limiting graphene conductive layer and the wire mesh shielding layer; the self-temperature-limiting graphene conductive layer comprises a conductive silver paste layer and a self-temperature-limiting graphene layer, and the conductive silver paste layer is arranged close to the metal conductor wire core; the sheath layer is provided with a plurality of antiskid grooves. The outer wall of the sheath layer is provided with a nanometer waterproof coating.

Description

Technical Field

[0001] The utility model relates to the technical field of snow melting and ice removing, in particular to a self-limiting temperature heating belt. Background Art

[0002] In cold winters, the northern regions of our country are often affected by freezing and snow accumulation, which brings great inconvenience to people's transportation. In order to ensure the safety and smoothness of road traffic, an efficient road surface snow melting and ice removing technology is crucial.

[0003] Chinese Patent Publication No. CN210536970U discloses a heating cable structure for road ice melting, which includes three groups of core bodies arranged in parallel. The outer sides of the core bodies are all wrapped with insulating layers, and the outside of the insulating layers is wrapped with an inner sheath. A clamping strip is inserted between the three groups of core bodies, and an outer sheath is sleeved outside the clamping strip. A plurality of card slots are evenly opened in the length direction outside the outer sheath, a shielding layer is sleeved outside the outer sheath, and a plurality of clamping rings are evenly fixed along the length direction inside the shielding layer. The clamping rings are matched with the card slots in size, and the distance between the clamping rings and the card slots is equal. The clamping strip is specifically a fluoroplastics clamping strip, and a compression cavity is penetrated inside the clamping strip. The shielding layer is specifically a mesh tin-plated copper wire layer, and the outer sheath is specifically a fluoroplastics layer. This utility model has high heating efficiency and is not easy to be damaged. However, this heating cable for road ice melting does not have the function of self-limiting temperature protection. With the increase of heating power, there is a problem that the cable may catch fire and cause a fire.

[0004] Chinese Patent Publication No. CN 215010754U discloses a graphene self-controlled temperature heating belt. The graphene self-controlled temperature heating belt includes a wire, a PTC, a heating wire layer, an inner sheath, a metal shielding layer, and an outer sheath from the inside to the outside. In this utility model, the graphene self-controlled temperature heating belt uses a PTC to replace a common resistor as heating element one, and a heating wire as heating element two. The PTC and the heating wire are separately connected to an external power supply through 2 wires, and the PTC and the heating wire are in parallel. The graphene self-controlled temperature heating belt of this utility model has uniform heating, high heating efficiency, excellent flexibility, anti-bending, anti-oxidation, waterproof and anti-electric shock properties. Through the self-adaptive temperature control characteristics of the PTC, the whole-line self-adaptive temperature control effect of the heating belt is realized. When the PTC material of this heating belt reaches its Curie temperature, the heating power decreases sharply due to the sharp increase in resistance and almost stops heating. However, the heating wire connected in parallel with it will still continue to work and continuously heat. Therefore, true self-limiting temperature cannot be achieved, and this heating belt does not have flame retardant and anti-slip functions, and is prone to sliding problems during use. Summary of the Utility Model

[0005] Therefore, in view of the above problems, the present utility model provides a self-limiting temperature heating belt to solve the problems that the existing heating belts for road ice melting do not have self-limiting temperature protection and anti-slip functions, and do not have flame retardant properties.

[0006] To achieve the above object, the present utility model adopts the following technical solutions:

[0007] A self-limiting temperature heating belt includes a self-limiting temperature heating belt body. The self-limiting temperature heating belt body includes a metal conductor wire core, a self-limiting temperature graphene conductive layer, a metal wire mesh shielding layer, an isolation layer, and a sheath layer, which are arranged in sequence from inside to outside; the metal conductor wire core is at least two; an insulating filling material is provided between the self-limiting temperature graphene conductive layer and the metal wire mesh shielding layer; the self-limiting temperature graphene conductive layer includes a conductive silver paste layer and a self-limiting temperature graphene layer, and the conductive silver paste layer is arranged close to the metal conductor wire core; a plurality of anti-slip grooves are provided on the sheath layer; a nano waterproof coating is provided on the outer wall of the sheath layer.

[0008] Further, the thickness of the self-limiting temperature heating belt body is 2 mm - 15 mm.

[0009] Further, there are two metal conductor wire cores, and each metal conductor wire core is parallel to each other. The diameter of the metal conductor wire core is 0.8 mm - 1 mm, and the metal conductor wire core is formed by twisting a plurality of copper wires.

[0010] Further, the insulating filling material is polypropylene.

[0011] Further, the material of the metal wire mesh shielding layer is copper wire, and the metal wire mesh shielding layer is a warp and weft plain weave structure.

[0012] Further, a flame retardant layer is coated on the outer layer of the self-limiting temperature graphene conductive layer.

[0013] Further, the anti-slip grooves are arranged longitudinally.

[0014] Further, the material of the sheath layer is polyurethane or silicone rubber.

[0015] Further, the nano waterproof coating is an organosilicon waterproof coating.

[0016] By adopting the foregoing technical solutions, the beneficial effects of the present utility model are as follows:

[0017] Setting two or more metal conductor wire cores has high reliability. When one metal conductor wire core fails, the other metal conductor wire cores can continue to conduct current, ensuring the normal operation of the self-limiting temperature heating belt.

[0018] The self-limiting temperature graphene conductive layer is provided with a conductive silver paste layer and a self-limiting temperature graphene layer, both of which are excellent conductive materials. Among them, the conductive silver paste layer has high heat resistance, good chemical stability, and low production cost; in addition to being able to self-limit the temperature to protect the heating belt, the self-limiting temperature graphene layer also has the characteristics of light weight, good bending performance, and anti-oxidation, and can adapt to the heating of different road surfaces.

[0019] The flame-retardant layer and the isolation layer provided on the outer layer of the self-limiting temperature graphene conductive layer can prevent fire from both the inside and the outside.

[0020] The thickness of the self-limiting temperature heating belt is relatively thin, which can increase the contact area with the road surface, facilitate heat transfer, and improve the ice melting efficiency.

[0021] The insulating filling material PP can block the electrical connection between the metal conductor core and the outside world, prevent air gap discharge, and avoid electric shock when personnel come into contact with the outside of the heating belt.

[0022] The sheath layer can prevent the heating belt from being physically damaged by external piercing, vehicle rolling, etc., and prevent water ingress or damage by corrosive liquids during ice melting.

[0023] The anti-slip grooves provided on the outer wall of the sheath layer can prevent the self-limiting temperature heating belt from sliding; the nano waterproof coating can effectively prevent moisture in the environment from entering the inside of the self-limiting temperature heating belt. Description of the Drawings

[0024] Figure 1 is a schematic cross-sectional view of the self-limiting temperature heating belt in the embodiment of the present invention;

[0025] Figure 2 is a schematic structural view of the metal wire mesh shielding layer in the embodiment of the present invention;

[0026] Explanation of the reference numerals in the figure: 1 - metal conductor core, 2 - self-limiting temperature graphene conductive layer, 3 - metal wire mesh shielding layer, 4 - isolation layer, 5 - sheath layer, 6 - insulating filling material, 21 - conductive silver paste layer, 22 - self-limiting temperature graphene layer, 23 - flame-retardant layer, 51 - anti-slip groove, 52 - nano waterproof coating. Detailed Embodiment

[0027] The embodiment of the present invention is as follows:

[0028] Reference Figure 1 And Figure 2, A self-limiting temperature heating belt, comprising a self-limiting temperature heating belt body. The self-limiting temperature heating belt body includes a metal conductor wire core 1, a self-limiting temperature graphene conductive layer 2, a metal wire mesh shielding layer 3, an isolation layer 4, and a sheath layer 5 arranged in sequence from inside to outside; there are two metal conductor wire cores 1, and each metal conductor wire core 1 is parallel to each other; an insulating filling material 6 is provided between the self-limiting temperature graphene conductive layer 2 and the metal wire mesh shielding layer 3; the self-limiting temperature graphene conductive layer 2 includes a conductive silver paste layer 21 and a self-limiting temperature graphene layer 22, and the conductive silver paste layer 21 is arranged close to the metal conductor wire core 1; the metal wire mesh shielding layer 3 is a plain weave structure of warp and weft; an anti-slip groove 51 is provided on the sheath layer 5; a nano waterproof coating 52 is provided on the outer wall of the sheath layer 5. The thickness of the self-limiting temperature heating belt body is 10 mm, each metal conductor wire core 1 is parallel to each other, the diameter of the metal conductor wire core 1 is 1 mm, the metal conductor wire core 1 is composed of a number of copper wires twisted together, the insulating filling material 6 is a non-open mesh tearing material PP, and the non-open mesh tearing material PP is as shown in the literature: [1] Zhang Dongmei, Guo Hongzhi. Research Progress on Halogen-Free Flame Retardant Polypropylene for Cables and Its Preparation Technology [J]. Synthetic Resin and Plastics, 2023, 40(3): 72-77. The material of the metal wire mesh shielding layer 3 is copper wire, and a flame retardant layer 23 is coated on the outer layer of the self-limiting temperature graphene conductive layer 2. The materials of the isolation layer 4 and the flame retardant layer 23 are as shown in the literature: [2] Fan Hua. Discussion on the Combustion Performance and Detection of Flame Retardant Electric Wires and Cables [J]. China High-Tech Enterprises, 2013(36): 2. It is Al(OH) 3 . The anti-slip groove 51 is arranged longitudinally, the material of the sheath layer 5 is polyurethane, and the nano waterproof coating 52 is an organosilicon waterproof coating.

[0029] The number of the above metal conductor wire cores 1 can also be set to one, three, four or even more. The diameter of the above metal conductor wire core 1 is usually set to 0.8 mm to 1 mm, and it can also be other lengths. The above metal conductor wire core 1 can also be composed of a number of aluminum wires, stainless steel wires, carbon fiber wires or other conductive materials, and the purpose of the present utility model can also be achieved.

[0030] The above insulating filling material 6 can also be ethylene-vinyl acetate copolymer, ethylene-propylene copolymer or other insulating filling materials, and the purpose of the present utility model can also be achieved.

[0031] The material of the above metal wire mesh shielding layer 3 can also be glass fiber, aluminum wire, stainless steel wire or other materials, and the purpose of the present utility model can also be achieved.

[0032] The outer layer of the above self-limiting temperature graphene conductive layer 2 may not be coated with the flame retardant layer 23, and the purpose of the present utility model can also be achieved.

[0033] The materials of the above-mentioned isolation layer 4 and flame retardant layer 23 can be Mg(OH) 2 or other materials, and the purpose of the present utility model can also be achieved

[0034] The above-mentioned anti-slip grooves 51 can also be inclined, arranged horizontally, arranged in other different directions or arranged in a spiral rotation, and the purpose of the present utility model can also be achieved

[0035] The material of the above-mentioned sheath layer 5 is silicone rubber or other materials, and the purpose of the present utility model can also be achieved

[0036] The above-mentioned nano waterproof coating 52 is a waterborne polyurethane waterproof coating, a terpolymer waterproof coating or other waterproof coatings, and the purpose of the present utility model can also be achieved

[0037] The working mode of the embodiment is as follows

[0038] The self-limiting temperature graphene conductive layer 2 is connected to an external power supply through the metal conductor core 1. When the external power supply is turned on, the current is transmitted to the conductive silver paste layer 21 and the self-limiting temperature graphene layer 22 through the metal conductor core 1. The current is blocked by the flame retardant layer 23, and the self-limiting temperature graphene layer 22 starts to heat up, generating heat and transferring the heat to the road surface through the insulating filling material 6, the metal wire mesh shielding layer 3, the isolation layer 4, and the sheath layer 5. Since the temperature of the road surface is higher than the ambient temperature, the ice melting and snow removal of the road surface are realized; when the temperature exceeds the Curie temperature of the self-limiting temperature graphene layer 22, the resistance increases sharply, resulting in a sharp decrease in the heating power, and the self-limiting temperature graphene layer hardly heats the self-limiting temperature heating belt structure any more, so as to stabilize the controlled temperature near its Curie temperature and realize the self-limiting temperature function; the insulating filling material 6 can block the electrical connection between the metal conductor core 1 and the outside world, and the metal wire mesh shielding layer 3 can effectively isolate the interference between the internal circuit and the external environment; the flame retardant layer 23 and the isolation layer 4 arranged on the outer layer of the self-limiting temperature graphene conductive layer 2 can flame retard from the inside and outside at the same time; the anti-slip grooves 51 arranged on the outer wall of the sheath layer 5 can prevent the self-limiting temperature heating belt from sliding; the nano waterproof coating 52 can effectively prevent the moisture in the environment from entering the inside of the self-limiting temperature heating belt

[0039] Although the present utility model is specifically shown and described in combination with the preferred implementation embodiments, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all of them fall within the protection scope of the present utility model

Claims

1. A self-limiting temperature heating belt, characterized in that: It includes a self-limiting temperature heat-generating belt body, which includes a metal conductor core, a self-limiting temperature graphene conductive layer, a metal wire mesh shielding layer, an isolation layer, and a sheath layer which are sequentially arranged from the inside to the outside; there are at least two metal conductor cores; an insulating filling material is arranged between the self-limiting temperature graphene conductive layer and the metal wire mesh shielding layer; the self-limiting temperature graphene conductive layer includes a conductive silver paste layer and a self-limiting temperature graphene layer, and the conductive silver paste layer is arranged close to the metal conductor core; a plurality of anti-slip grooves are arranged on the sheath layer; and a nano waterproof coating is arranged on the outer wall of the sheath layer.

2. A self-limiting temperature heating belt according to claim 1, characterized in that: The thickness of the self-limiting temperature heating belt body is 2mm-15mm.

3. A self-limiting temperature heating belt according to claim 1, characterized in that: There are two metal conductor cores, each of which is parallel to each other. The diameter of the metal conductor core is 0.8mm-1mm, and the metal conductor core is formed by twisting a number of copper wires.

4. A self-limiting temperature heating belt according to claim 1, characterized in that: The insulating filling material is polypropylene.

5. A self-limiting temperature heating belt according to claim 1, characterized in that: The material of the metal wire mesh shielding layer is copper wire, and the metal wire mesh shielding layer is a warp and weft plain weave structure.

6. A self-limiting temperature heating belt according to claim 1, characterized in that: The outer layer of the self-temperature limiting graphene conductive layer is coated with a flame retardant layer.

7. A self-limiting temperature heating belt according to claim 1, characterized in that: The anti-slip groove is arranged along the longitudinal direction.

8. The self-limiting temperature heating belt according to claim 1, characterized in that: The material of the sheath layer is polyurethane or silicone rubber.

9. The self-limiting temperature heating belt according to claim 1, characterized in that: The nano waterproof coating is an organic silicon waterproof coating.

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