Flexible graphene heating jacket

Abstract

The utility model relates to the technical field of graphene electrothermal film materials, in particular to a flexible graphene heating jacket. The outer lining, the heat preservation layer, the heating layer and the inner lining are sequentially arranged on the section of the cylinder wall in a nested mode from outside to inside. The outer lining and the inner lining are made of high-temperature-resistant materials; the thermal insulation layer is made of thermal insulation materials; the heating layer is formed by curling or splicing and enclosing a heating surface, the heating surface is formed by continuously winding and uniformly arranging graphene heating belts on a plane and extending the graphene heating belts, and a gap is formed between every two adjacent graphene heating belts; electrode wires are led out of the heating layer to serve as power input interfaces. The heating jacket has the advantages that the temperature of the whole heating surface is uniformly distributed, and the heating jacket is sleeved on an object to be heated according to requirements, so that the object can be uniformly heated, and the heating effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of graphene electric heating film material, concretely relates to a flexible graphene heating sleeve. BACKGROUND

[0002] Graphene material is widely used in various fields due to its good conductivity and heat conduction performance. The electric heating film prepared from graphene can meet the application requirements of flexible folding, large-area uniform heating, functional material compounding, etc.

[0003] The graphene-based electric heating film is mainly formed by printing and coating the conductive slurry obtained by mixing powder materials such as graphene, solvents, resins, and additives on a substrate to form a heating body, and then covering a layer of substrate to form a "sandwich" structure with two layers of substrate and one layer of heating body. The bottom layer of substrate can use relatively soft materials such as fiberglass cloth and nylon. Although it meets the function of bending and folding of the electric heating film, in actual use, the traditional planar graphene electric heating film often suffers structural damage and separation of graphene and the substrate due to stress concentration, thermal expansion and contraction, etc., resulting in uneven heating and reduced heating efficiency. At the same time, when designing various complex-shaped heating sleeves, the planar graphene film needs to be cut and spliced to adapt, which will damage the original current path and cannot guarantee uniform heating effect.

[0004] At the same time, the prior art discloses a graphene heating strip in the form of a long strip, which is obtained by compounding graphene slurry and flexible substrate by scraping or dipping method, and is easy to bend. See reference CN117896859A. SUMMARY

[0005] The utility model aims at providing a flexible graphene heating sleeve with uniform heating and high durability.

[0006] The flexible graphene heating sleeve provided by the utility model is in the form of a cylinder, and the cylinder wall cross section is sequentially nested with an outer liner, a heat preservation layer, a heating layer, and an inner liner from the outside to the inside;

[0007] The outer liner and the inner liner are made of high-temperature resistant materials;

[0008] The heat preservation layer is made of heat preservation and insulation materials;

[0009] The heating layer is formed by curling or splicing a heating surface. The heating surface is uniformly arranged on a plane by continuously winding the graphene heating strip, and gaps are provided between adjacent graphene heating strips.

[0010] The heating layer draws out electrode wires as power input interfaces.

[0011] The heating surface is formed by graphene heating bands arranged in parallel in a continuous S shape, as shown in the figure. Figure 1 The graphene heating band comprises a flexible substrate and a graphene slurry layer, and the graphene slurry layer is arranged on the surface of the flexible substrate.

[0012] In the utility model, the heating layer is pasted on the inner surface of the inner lining through conductive glue, and an insulating layer is arranged between the heating layer and the heat preservation layer; the insulating layer can fix the conductive substance in the graphene heating band, and meanwhile, the contact short circuit between the graphene heating bands in the curling process is avoided.

[0013] The insulating layer can be made of insulating resin material.

[0014] In the utility model, the electrode wires are divided into positive and negative electrode wires, and are arranged on the two sides of the graphene heating band and run along with the graphene heating band.

[0015] In the utility model, the electrode wires are fixed on the two sides of each graphene heating band through sewing, pasting, printing, scraping and the like.

[0016] In the utility model, the width of the graphene heating band is 5-10 mm, and the thickness is 100 mu m; and the gap of the graphene heating band is 2-5 mm.

[0017] In the utility model, the high-temperature-resistant material of the outer lining and the inner lining is glass fiber non-woven fabric and the like.

[0018] In the utility model, the heat preservation layer adopts heat insulation sponge, asbestos or other fillers.

[0019] In the utility model, the whole flexible graphene heating sleeve is in the shape of a cylindrical tube, Y-shaped cylindrical tube, square tube or annular tube, so as to meet the needs of different use scenarios.

[0020] In the utility model, the substrate material of the graphene heating band is glass fiber cloth, polyester fiber, ceramic fiber and the like.

[0021] In the utility model, the width of the graphene heating band is adjusted according to the size and heating power of the prepared heating sleeve.

[0022] In the utility model, the geometric shape and gap size of the heating band / heating surface can be adjusted to adapt to the specification parameters of different heating sleeves. Preferably, for special-shaped heating sleeves, corresponding heating surface patterns can be designed to ensure uniform heating effect everywhere, and the connection between different heating areas is realized through the heating band, so as to meet the needs of different use scenarios.

[0023] The graphene heating sleeve is used for packaging the heat-conducting medium in the inside through the outer lining and the inner lining, the graphene heating band in the inside of the heating sleeve generates heat after being electrified, the heating efficiency can be controlled by adjusting the width of the heating band; the heating band can be extended into a complete heating plane through the winding mode with the electrode wires on the two sides, the uniformity on the heating plane can be effectively ensured due to the small spacing of the connected heating bands; the internal stress in the process of using the traditional surface heating film can be eliminated through the heating band forming the heating surface mode, and the durability is improved; meanwhile, the heating band can be wound into various complex heating surfaces according to the overall structure of the heating sleeve, and the uniform heating of the special-shaped heating sleeve is realized.

[0024] The advantage of the utility model lies in that the whole heating surface temperature is uniformly distributed, the heating sleeve is sleeved on the object which needs to be heated according to the need, can make it heat evenly, improve the heating effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is graphene heating sleeve wall section structure schematic diagram.

[0026] Figure 2 It is graphene heating band and electrode composite schematic diagram.

[0027] Figure 3 It is embodiment 1 schematic diagram.

[0028] Figure 4 It is graphene heating sleeve and resistance wire heating sleeve simulation model structure diagram effect contrast.

[0029] Figure 5 It is annular graphene electric heating sleeve structure schematic diagram.

[0030] Figure 6 , Figure 7 It is Y type pipe graphene electric heating sleeve and its unfolded structure schematic diagram.

[0031] Figure 8 It is box type (square cylinder) graphene electric heating sleeve structure schematic diagram.

[0032] Marked number in the drawing: 1 is outer lining, 2 is heat preservation layer, 3 is heating layer, 4 is inner lining, 5 is graphene heating band, 6 is positive and negative electrode wire. DETAILED DESCRIPTION

[0033] The utility model discloses a whole cylinder, and the outer lining 1, heat preservation layer 2, heating layer 3 and inner lining 4 that are sequentially arranged from outside to inside are arranged in the cylinder wall section.

[0034] The outer lining 1 and the inner lining 4 adopt high-temperature-resistant glass fiber non-woven fabric.

[0035] The heat preservation layer 2 is heat insulation sponge, asbestos or other filler.​

[0036] The heating layer 3 is a heating surface curled and enclosed, the heating surface is uniformly arranged by the continuous winding of graphene heating strips 5 on a plane, and is extended, and gaps are provided between adjacent graphene heating strips 5; the graphene heating strip 5 comprises a flexible substrate and a graphene paste layer, and the graphene paste layer is arranged on the surface of the flexible substrate;

[0037] The heating layer 3 respectively leads out positive and negative electrode wires 6 as power input interfaces, and the positive and negative electrode wires 6 are respectively arranged on both sides of the graphene heating strip and wind along with the graphene heating strip;

[0038] The heating layer 3 is pasted on the inner surface of the inner lining 4 through conductive glue, and an insulating layer is provided between the heating layer 3 and the heat preservation layer 2; the insulating layer can fix the conductive substance inside the graphene heating strip 5, and at the same time, avoid the contact short circuit between the graphene heating strips 5 in the curling process;

[0039] The heating surface is extended by the continuous S-shaped winding and parallel arrangement of the graphene heating strips 5, as shown in Figure 2 .

[0040] Specifically as follows.

[0041] Embodiment 1

[0042] In this embodiment, a fiberglass cloth strip with a width of 10 mm is selected, graphene paste is uniformly coated on both surfaces of the fiberglass cloth strip, a graphene thin layer with a thickness of about 100 μm is obtained, and the graphene thin layer is baked to be firmly combined to obtain a graphene heating strip.

[0043] The graphene heating strip is pasted on the surface of the outer lining of the electric heating jacket through conductive glue, and is wound according to a preset pattern to obtain a uniformly covered heating surface, and the band gap between the heating strips is 2 m; as shown in Figure 3 .

[0044] Copper metal wires are fixed along the two side edges of the heating strip by sewing, so that the positive and negative electrodes are arranged on the heating surface, and the current loop is formed between the positive and negative electrode wires and the heating strip, and the heating surface is completely laid on the substrate of the electric heating jacket.

[0045] Phenyl resin is coated on the surface of the electrode and the graphene heating strip, and is heat-treated at 80°C for 12 h to be cured.

[0046] A layer of thermal insulation sponge is covered on the heating surface, the heating medium is packaged in cooperation with the surface of the inner lining, the electrode wire is connected with the external power wire, finally, the composite film structure is wound, and is sewn at a suitable position, and buckles, nylon buckles and the like are designed to facilitate the disassembly of the electric heating jacket in the use process.

[0047] Embodiment 2

[0048] The embodiment provides a cylindrical graphene electric heating sleeve, characterized by comprising the following steps.

[0049] A fiberglass cloth strip with a width of 5 mm is selected, graphene paste is uniformly scraped on both surfaces of the fiberglass cloth strip, a graphene thin layer with a thickness of about 100 microns is obtained, and the graphene thin layer is dried to be firmly combined to obtain a graphene heating belt.

[0050] The graphene heating belt is pasted on the surface of the outer lining of the electric heating sleeve through conductive glue, and the graphene heating belt is wound according to a preset pattern (refer to Figure 1 ) to obtain a uniformly covered heating surface, and the band gap between the graphene heating belts is 5 mm.

[0051] Copper metal wires are fixed along both side edges of the graphene heating belt by sewing, so that the positive and negative electrodes are arranged on the heating surface, and the current loop is formed between the positive and negative electrode wires and the graphene heating belt, and the heating surface is completely laid on the substrate of the electric heating sleeve.

[0052] Phenyl resin is coated on the surface of the electrode and the graphene heating belt, and is cured by heat treatment.

[0053] A layer of thermal insulation sponge is covered on the heating surface to encapsulate the heating medium together with the inner lining surface, the electrode wire is connected with the external power wire, finally, the composite film structure is wound and sewn at a suitable position, and buckles, nylon buckles and the like are designed to facilitate disassembly of the electric heating sleeve in use.

[0054] Embodiment 3

[0055] The embodiment provides a cylindrical graphene electric heating sleeve, characterized by comprising the following steps.

[0056] A fiberglass cloth strip with a width of 10 mm is selected, graphene paste is uniformly scraped on both surfaces of the fiberglass cloth strip, a graphene thin layer with a thickness of about 100 microns is obtained, and the graphene thin layer is dried to be firmly combined to obtain a graphene heating belt.

[0057] The graphene heating belt is pasted on the surface of the outer lining of the electric heating sleeve through conductive glue, and the graphene heating belt is wound according to a preset pattern to obtain a uniformly covered heating surface, and the band gap between the graphene heating belts is 2 mm.

[0058] Silver metal wires are fixed along both side edges of the graphene heating belt by screen printing, so that the positive and negative electrodes are arranged on the heating surface, and the current loop is formed between the positive and negative electrode wires and the graphene heating belt, and the heating surface is completely laid on the substrate of the electric heating sleeve.

[0059] Phenyl resin is coated on the surface of the electrode and the graphene heating belt, and is cured by heat treatment.

[0060] Cover a layer of heat insulation sponge on the heating surface, match the inner lining surface to encapsulate the heating medium, connect the electrode wire lead-out wire with the external power supply wire. Finally, roll up the composite film structure and sew it at a suitable position, and design buckles, nylon buckles and the like to facilitate disassembly of the electric heating sleeve during use.

[0061] Comparative Example

[0062] The embodiment provides a heating effect simulation of a graphene electric heating sleeve. The simulation is realized by using a comsol multi-physical field simulation software. The heating sleeve is a sandwich structure, and graphene heating strips with a width of 7 mm / 10 mm (corresponding to strip gaps of 5 mm / 2 mm, respectively) are arranged in the middle. The graphene heating strips cover the heating area in a winding arrangement, and the inner and outer layers are thermal insulation layers. After the graphene electric heating sleeve is powered on, a 3 mm thick hollow quartz tube is heated to different temperatures (200℃ / 400℃ / 600℃, with the average value as the reference), and the temperature distribution of the heated quartz tube is analyzed.

[0063] The comparative example provides a heating effect simulation of a resistance wire electric heating sleeve. The simulation is realized by using a comsol multi-physical field simulation software. The heating sleeve is a sandwich structure, and a resistance wire is arranged in the middle. The diameter of the resistance wire is 1.2 mm, and the center-to-center distance between adjacent resistance wires is 6 mm. The resistance wire electric heating sleeve covers the heating area in a winding arrangement, and the inner and outer layers are thermal insulation layers. After the resistance wire electric heating sleeve is powered on, a 3 mm thick quartz tube is heated to different temperatures (200℃ / 400℃ / 600℃, with the average value as the reference), and the temperature distribution of the heated quartz tube is analyzed.

[0064] The simulation data results of the two comparisons reflect the temperature difference (reference Figure 4 ) at three positions (1, 2, and 3) on the cross section of the quartz tube, and the temperature distribution at the first position. The results show that the graphene electric heating sleeves with two different heating strip sizes have different degrees of heating, and the internal temperature difference of the heated quartz tube is smaller than that of the traditional resistance wire electric heating sleeve. In addition, the width and gap of the graphene can be further adjusted according to the temperature uniformity requirement or the current parameter.

[0065] Quartz tube cross-section temperature difference statistics under different heating sleeves

[0066]

[0067] Example 4

[0068] The embodiment provides a ring-shaped graphene electric heating sleeve. A fiberglass cloth strip with a width of 10 mm is selected, and graphene paste is uniformly scraped on both sides of the fiberglass cloth strip to obtain a graphene thin layer with a thickness of about 100 μm. The graphene thin layer is dried to make it firm, and a graphene heating strip is obtained.

[0069] The graphene heating strip is pasted on the outer lining surface of a customized electric heating sleeve through conductive adhesive, and a preset pattern (referenceFigure 5 )around the heating surface to obtain uniform coverage, the band gap between the heating bands is 2mm.

[0070] The copper metal wire is fixed as the positive and negative electrode wires along the two side edges of the heating band by sewing, so that the positive and negative electrodes are arranged on the heating surface, and the positive and negative electrode wires form a current loop with the heating band. The heating surface is laid on the electric heating sleeve substrate.

[0071] The phenyl resin is coated on the surface of the electrode and the graphene heating band, and is heat-treated at 80°C for 12h to solidify.

[0072] A layer of thermal insulation sponge is covered on the heating surface to package the heating medium in cooperation with the inner lining surface. The electrode wire lead-out wire is connected with the external power supply wire. Finally, the composite film structure is wound and sewn at a suitable position, and buckles, nylon buckles and the like are designed to facilitate disassembly of the electric heating sleeve during use.

[0073] Example 5

[0074] The embodiment provides a Y-shaped tube graphene electric heating sleeve, characterized by comprising the following steps:

[0075] A fiberglass cloth strip with a width of 10mm is selected, and graphene paste is uniformly scraped on both surfaces to obtain a graphene thin layer of about 100μm, and is dried to make it firm. The graphene heating band is obtained.

[0076] The graphene heating band is pasted on the surface of the customized electric heating sleeve outer lining through conductive glue, and is wound around the heating surface to obtain uniform coverage according to a preset pattern (for reference Figure 6 、 Figure 7 )with a band gap of 2mm between the heating bands.

[0077] The copper metal wire is fixed as the positive and negative electrode wires along the two side edges of the heating band by sewing, so that the positive and negative electrodes are arranged on the heating surface, and the positive and negative electrode wires form a current loop with the heating band. The heating surface is laid on the electric heating sleeve substrate.

[0078] The phenyl resin is coated on the surface of the electrode and the graphene heating band, and is heat-treated at 80°C for 12h to solidify.

[0079] A layer of thermal insulation sponge is covered on the heating surface to package the heating medium in cooperation with the inner lining surface. The electrode wire lead-out wire is connected with the external power supply wire. Finally, the composite film structure is wound and sewn at a suitable position, and buckles, nylon buckles and the like are designed to facilitate disassembly of the electric heating sleeve during use.

[0080] Example 6

[0081] The embodiment provides a box type graphene electric heating sleeve, characterized by comprising the following steps.

[0082] A glass fiber cloth strip with a width of 10 mm is selected, graphene paste is uniformly scraped on both sides of the glass fiber cloth strip to obtain a graphene thin layer with a thickness of about 100 microns, and the graphene thin layer is dried to be firmly combined to obtain a graphene heating belt.

[0083] The graphene heating belt is pasted on the surface of the customized outer liner of the electric heating sleeve through conductive glue, and is wound according to a preset pattern (refer to Figure 8 ) to obtain a uniformly covered heating surface, and the band gap between the heating belts is 2 mm.

[0084] The copper metal wires are fixed as positive and negative electrode wires along the two side edges of the heating belt through sewing, so that the positive and negative electrodes are arranged to form a current loop by winding on the heating surface, and the heating surface is laid on the substrate of the electric heating sleeve. The positive and negative electrode wires between each heating surface are connected in series through additional wires, and can be simultaneously electrified and heated.

[0085] The phenyl resin is coated on the surface of the electrode and the graphene heating belt, and is heat-treated at 80 DEG C for 12 hours to be cured.

[0086] A layer of heat insulation sponge is covered on the heating surface, the heating medium is packaged in cooperation with the inner liner surface, the electrode wire is connected with the external power supply wire. Finally, the composite film structure is wound and sewn at a suitable position, and buckles, nylon buckles and the like are designed to facilitate disassembly of the electric heating sleeve in the use process.

[0087] The heating sleeve can be designed into any sleeve type according to needs, is sleeved on an object to be heated, can make the object to be heated uniformly, and improves the heating effect.

[0088] Although the above methods are illustrated and described as a series of structures for simplicity of explanation, it should be understood and appreciated that the methods are not limited to the specific, because according to one or more embodiments, some structures can occur in different order and / or concurrently with other actions from the illustrated and described herein or not illustrated and described herein but can be understood by those skilled in the art.

[0089] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications of the disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible graphene heating jacket characterized in that, The whole is in a cylindrical shape, and the cross section of the cylinder wall is sequentially nested from outside to inside with an outer liner, a heat preservation layer, a heating layer and an inner liner; The outer liner and the inner liner are made of high-temperature resistant materials; The heat preservation layer is made of heat preservation and insulation materials; The heating layer is formed by winding or splicing a heating surface, and the heating surface is uniformly arranged on a plane by continuously winding graphene heating bands with gaps between adjacent graphene heating bands; The heating layer leads out electrode wires as power input interfaces.

2. The flexible graphene heating jacket of claim 1, wherein, The heating surface is formed by continuously winding graphene heating bands in an S shape and parallel arrangement.

3. The flexible graphene heating jacket of claim 2, wherein, The heating layer is attached to the inner surface of the inner liner by conductive adhesive, and an insulating layer is arranged between the heating layer and the heat preservation layer.

4. The flexible graphene heating jacket of claim 1, 2 or 3, wherein, The electrode wires are divided into positive and negative electrode wires and are arranged on both sides of the graphene heating band.

5. The flexible graphene heating jacket of claim 4, wherein, The electrode wires are fixed on both sides of each graphene heating band by sewing, attaching, printing or scraping.

6. The flexible graphene heating jacket of claim 4, wherein, The width of the graphene heating band is 5-10 mm, and the thickness is 100 μm; the gap between the graphene heating bands is 2-5 mm.

7. The flexible graphene heating jacket of claim 1, wherein, The high-temperature resistant material of the outer liner and the inner liner is glass fiber non-woven fabric.

8. The flexible graphene heating jacket of claim 1, wherein, The heat preservation layer uses heat insulation sponge or asbestos.

9. The flexible graphene heating jacket of claim 1, wherein, The whole of the flexible graphene heating sleeve is in a cylindrical shape, a Y-shaped cylindrical shape, a square cylindrical shape or a ring shape.

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