Detachable composite material high-temperature mine heat insulation felt
By designing a detachable composite high-temperature mine insulation felt, and using flame-retardant gel felt and magnets for fixation, the problem of mismatch between insulation felt and mine needs was solved, achieving both insulation effect and recyclability, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-04-03
AI Technical Summary
Existing thermal insulation felt materials are not suitable for the needs of mine insulation and are not recyclable, resulting in waste and high costs.
A detachable composite high-temperature mine insulation felt is designed, comprising a magnetic protective layer, a magnetic layer, a main material protective layer, and a main material layer. It utilizes a flame-retardant gel felt as the core insulation material and is fixed to an anchor mesh by magnets, enabling it to be detachable and reusable.
It effectively isolates the high temperature of the rock mass, reduces the pressure of ventilation and cooling, adapts to the complex environment of the mine, reduces costs, and enables the heat insulation felt to be detachable and reused multiple times.
Smart Images
Figure CN224075207U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of high-temperature mine heat hazard control technology, specifically to a detachable composite material high-temperature mine insulation felt. Background Technology
[0002] As underground mining operations extend to deeper levels, high-temperature heat hazards at depth have become a key issue restricting underground production. High-temperature rock masses formed by geothermal activity are one of the main heat sources in mine tunnels. Using insulation materials to isolate these high-temperature rock masses can effectively control the heat source, reduce heat transfer, thereby lowering the temperature of underground tunnels and improving the working environment. Furthermore, the complex underground mining environment, characterized by confined spaces, poor ventilation, moisture, and frequent equipment movement that can cause scratches, necessitates insulation materials that are non-toxic, harmless, waterproof, moisture-proof, wear-resistant, and easy to install.
[0003] Thermal insulation felt, a new type of thermal insulation material widely used in the construction industry, has advantages such as good thermal insulation performance, stable structure, and low density. However, in the mining industry, due to a lack of suitable application materials and feasible application methods, there are few cases of thermal insulation felt being used for mine insulation.
[0004] Since thermal insulation felt is relatively expensive compared to ordinary support materials, and is only used for a short period of time when working at the tunnel face, traditional applications cannot be reused, resulting in a lot of waste. There is an urgent need to invent a thermal insulation felt that can be recycled multiple times, thereby greatly reducing costs.
[0005] In view of this, it is necessary to provide a detachable composite material high-temperature mine insulation felt to solve the above problems. Summary of the Invention
[0006] In view of the problems existing in the background technology, this application provides a detachable composite material high-temperature mine insulation felt. By combining different insulation layers and magnetic layers, it can solve the problems that existing insulation felt materials do not match the mine insulation requirements and that the insulation materials cannot be recycled.
[0007] This application provides a detachable composite high-temperature mine insulation felt, including a main structure and an edging covering the sidewalls of the main structure; the main structure includes, from top to bottom, a magnetic protective layer, a magnetic layer, a first main material protective layer, a main material layer, and a second main material protective layer; wherein, the main material layer includes a flame-retardant gel felt; the first main material protective layer includes, from top to bottom, a first flame-retardant Oxford cloth and a first flame-retardant PEVA film; the second main material layer includes, from top to bottom, a second flame-retardant PEVA film and a second flame-retardant Oxford cloth; the magnetic layer includes a plurality of spaced magnets; the magnetic protective layer includes, from top to bottom, a PE aluminum foil layer and a flame-retardant spunlace nonwoven fabric, wherein the PE aluminum foil layer is used to contact the tunnel wall.
[0008] In the technical solution of this application embodiment, by setting a main material layer with good heat insulation effect, the high temperature of the rock mass can be effectively isolated, reducing the pressure of ventilation and cooling; a protective layer is set, which has the characteristics of blocking heat radiation, waterproofing, wear resistance and reinforcement, so that the heat insulation felt can adapt well to the complex environment of the mine; in addition, by making full use of the full-section support of the anchor mesh in metal mines and designing a magnetic layer, the heat insulation felt can be disassembled and recycled while being convenient for construction, thereby greatly reducing costs.
[0009] In some embodiments, the thickness of the flame-retardant gel felt is 8–12 mm.
[0010] In this embodiment, the flame-retardant gel felt is used as the core thermal insulation material, giving the thermal insulation felt excellent thermal insulation and fireproof performance.
[0011] In some embodiments, the thickness of the first flame-retardant Oxford cloth is 0.8–1.2 mm, and the thickness of the first flame-retardant PEVA film is 0.18–0.22 mm; the thickness of the second flame-retardant Oxford cloth is 0.8–1.2 mm, and the thickness of the second flame-retardant PEVA film is 0.18–0.22 mm.
[0012] In this embodiment, flame-retardant Oxford cloth is used to isolate water spray, greatly increasing the strength, toughness, and abrasion resistance of the thermal insulation felt, and preventing the fractured rock wall from scratching the main material of the thermal insulation felt; flame-retardant PEVA is used to isolate water vapor and prevent moisture, while sealing the porous medium of the main material layer to reduce the impact of convective heat transfer in the pores on the thermal insulation performance of the material.
[0013] In some embodiments, the magnets are strip-shaped and uniformly arranged at the same spacing; the magnets have a thickness of 1.8–2.2 mm, a width of 18–22 mm, and a length equal to the length of the heat insulation felt; the spacing is 18–22 mm.
[0014] In this embodiment, the full-section support of the anchor mesh is fully utilized in metal mines. By setting up magnets to attract the anchor mesh and fix the heat insulation felt, the heat insulation felt can be disassembled and reused.
[0015] In some embodiments, the thickness of the PE aluminum foil layer is 0.3 to 0.7 mm; and the thickness of the flame-retardant spunlace nonwoven fabric is 0.8 to 1.2 mm.
[0016] In this embodiment, the PE aluminum foil layer is used to block the heat radiation from the high-temperature rock wall, isolate water spray, and protect the heat insulation felt from damage caused by friction with the rock wall; the flame-retardant hydroentangled nonwoven fabric is used to increase the toughness of the PE aluminum foil layer and prevent it from breaking or falling off in chunks.
[0017] In some embodiments, the edging includes a third flame-retardant Oxford cloth and a third flame-retardant PEVA film arranged sequentially from the outside to the inside; the thickness of the third flame-retardant Oxford cloth is 0.8 to 1.2 mm, and the thickness of the third flame-retardant PEVA film is 0.18 to 0.22 mm.
[0018] In this embodiment, by designing the outer side to be flame-retardant Oxford cloth and the inner side to be flame-retardant PEVA film, the edge itself can be made waterproof, wear-resistant and high-strength, while wrapping the various layers of materials in the heat insulation felt to prevent the edges from fraying.
[0019] In some embodiments, an adhesive layer is also included between the layers.
[0020] In this embodiment, the layers of material are bonded together with a suitable adhesive to make the structure more stable.
[0021] In some embodiments, the size of the heat insulation felt is 1m*1m or 1m*2m.
[0022] In this embodiment, the two sizes of insulation felt can be used in different mine site environments.
[0023] The following is an overview of the technical solution of this application. In order to make the technical means of this application clearer and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.
[0025] Figure 1A schematic diagram of the cross-sectional structure of the detachable composite high-temperature mine insulation felt provided in the embodiments of this application.
[0026] Figure 2 This is a schematic diagram of the simulated structure of the detachable composite high-temperature mine insulation felt provided in the embodiments of this application when the edges are not wrapped.
[0027] Figure 3 A schematic diagram of the disassembled structure of each layer of the main body of the detachable composite high-temperature mine insulation felt provided in the embodiments of this application.
[0028] Explanation of reference numerals in the attached drawings: 1. Flame-retardant gel felt; 21. First flame-retardant Oxford cloth; 22. First flame-retardant PEVA film; 3. Magnet; 41. PE aluminum foil layer; 42. Flame-retardant spunlace nonwoven fabric; 51. Second flame-retardant Oxford cloth; 52. Second flame-retardant PEVA film; 61. Third flame-retardant Oxford cloth; 62. Third flame-retardant PEVA film. Detailed Implementation
[0029] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0032] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0033] In the description of the embodiments of this application, the technical terms "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0035] Currently, in terms of mine insulation, due to the complex underground environment, poor ventilation in confined spaces, waterlogging, frequent equipment entry and exit leading to scratches, and high working face temperatures unsuitable for prolonged operations, there are few suitable insulation felts for mine insulation. Furthermore, insulation felts are more expensive than ordinary support materials, and in practice, they are only used for short periods during roadway face operations, resulting in significant waste due to traditional application methods.
[0036] To address the technical problems of existing thermal insulation felt materials not meeting the thermal insulation needs of mines and the non-recyclability of thermal insulation materials, this application provides a detachable composite high-temperature mine thermal insulation felt. This felt is not only suitable for the mine environment and has excellent thermal insulation performance, effectively isolating high temperatures in the rock mass, thus improving the working environment at the face and reducing ventilation and cooling pressures, but also fully utilizes the full-section support of anchor mesh in metal mines. The design incorporates magnetically attached thermal insulation felt, making construction convenient while ensuring the detachability and recyclability of the thermal insulation felt, thereby significantly reducing costs.
[0037] The present application will be further described below with reference to specific implementation methods.
[0038] Please see Figures 1-3This application provides a detachable composite high-temperature mine insulation felt, including a main structure and an edging covering the sidewalls of the main structure; the main structure includes a magnetic protective layer, a magnetic layer, a first main material protective layer, a main material layer and a second main material protective layer arranged sequentially from top to bottom; wherein, the main material layer includes a flame-retardant gel felt 1; the first main material protective layer includes a first flame-retardant Oxford cloth 21 and a first flame-retardant PEVA film 22 arranged sequentially from top to bottom; the second main material layer includes a second flame-retardant PEVA film 51 and a second flame-retardant Oxford cloth 52 arranged sequentially from top to bottom; the magnetic layer includes a plurality of spaced magnets 3; the magnetic protective layer includes a PE aluminum foil layer 41 and a flame-retardant spunlace nonwoven fabric 42 arranged sequentially from top to bottom, the PE aluminum foil layer 41 being used to contact the tunnel rock wall.
[0039] By using the above methods, the main material layer with good heat insulation effect can effectively isolate the high temperature of the rock mass and reduce the pressure of ventilation and cooling. The protective layer has the characteristics of blocking heat radiation, waterproofing, wear resistance and reinforcement, which can make the heat insulation felt adaptable to the complex environment of the mine. In addition, by making full use of the full-section support of anchor mesh in metal mines and designing a magnetic layer, the heat insulation felt can be disassembled and recycled while making construction convenient, thereby greatly reducing costs.
[0040] Furthermore, in the embodiments of this application, the thickness of the flame-retardant gel felt 1 is 8-12 mm. The material of the flame-retardant gel felt 1 can be selected from existing materials as needed; this application does not consider this an improvement point, nor does it limit it. Only as an example, in some embodiments of this application, the flame-retardant gel felt 1 used is an aerogel felt composed of glass fiber as the skeleton and SiO2 as the dispersed phase.
[0041] Through the above methods, the flame-retardant gel felt 1 is used as the core heat insulation material, which enables the heat insulation felt to have excellent heat insulation and fireproof performance.
[0042] Furthermore, in the embodiments of this application, the thickness of the first flame-retardant Oxford cloth 21 is 0.8-1.2 mm, the thickness of the first flame-retardant PEVA film 22 is 0.18-0.22 mm; the thickness of the second flame-retardant Oxford cloth 51 is 0.8-1.2 mm, and the thickness of the second flame-retardant PEVA film 52 is 0.18-0.22 mm.
[0043] Through the above methods, flame-retardant Oxford cloth is used to isolate water spray, greatly increasing the strength, toughness, and wear resistance of the thermal insulation felt, and preventing the main material of the thermal insulation felt from being scratched by the broken rock wall; flame-retardant PEVA film is used to isolate water vapor and prevent moisture, while sealing the porous medium of the main material layer, reducing the impact of convective heat transfer in the pores on the thermal insulation performance of the material.
[0044] Furthermore, in this embodiment, the magnet 3 is strip-shaped and evenly arranged at the same spacing; the magnet 3 has a thickness of 1.8-2.2 mm, a width of 18-22 mm, and a length equal to the length of the heat insulation felt; the spacing is 18-22 mm.
[0045] By using the above methods, the full-section support of the anchor mesh can be fully utilized in metal mines. By setting up magnets 3 to attract the anchor mesh and fix the heat insulation felt, the heat insulation felt can be disassembled and recycled.
[0046] Furthermore, in the embodiments of this application, the thickness of the PE aluminum foil layer 41 is 0.3 to 0.7 mm; and the thickness of the flame-retardant spunlace nonwoven fabric 42 is 0.8 to 1.2 mm.
[0047] In the above manner, the PE aluminum foil layer 41 is used to block the heat radiation of the high-temperature rock wall, isolate water spray, and protect the heat insulation felt from damage caused by friction with the rock wall; the flame-retardant hydroentangled nonwoven fabric 42 is used to increase the toughness of the PE aluminum foil layer 41 and prevent it from breaking or falling off in pieces.
[0048] Furthermore, in this embodiment of the application, the edging includes a third flame-retardant Oxford cloth 61 and a third flame-retardant PEVA film 62 arranged sequentially from the outside to the inside; the thickness of the third flame-retardant Oxford cloth 61 is 0.8 to 1.2 mm, and the thickness of the third flame-retardant PEVA film 62 is 0.18 to 0.22 mm.
[0049] By designing an edging with flame-retardant Oxford cloth on the outside and flame-retardant PEVA film on the inside, the edging itself can be made waterproof, wear-resistant, and high-strength, while fixing the various layers of materials in the heat insulation felt.
[0050] In some embodiments of this application, the edging can be provided separately. In other embodiments, the edging can also be formed by folding up the second main material protective layer, in which case the size of the second main material protective layer is slightly larger than the other layers. With this arrangement, it is not necessary to prepare additional edging material to achieve wrapping of each layer of material in the thermal insulation felt.
[0051] Furthermore, in the embodiments of this application, adhesive layers are also included between the various layers. More specifically, in some embodiments of this application, the flame-retardant spunlace nonwoven fabric 42 is bonded to the magnet 3 using neoprene rubber adhesive; the magnet 3 is bonded to the first flame-retardant Oxford cloth 21 using neoprene rubber adhesive; and the other layers are bonded together using white latex adhesive.
[0052] By using the above method, the various layers of materials are bonded together with a suitable adhesive, making the structure more stable.
[0053] Furthermore, in this embodiment of the application, the size of the heat insulation felt is 1m*1m or 1m*2m.
[0054] In this way, the two sizes of insulation felt can be used in different mine site environments.
[0055] Example
[0056] The detachable composite high-temperature mine insulation felt has a specification of 1m*1m and includes a flame-retardant gel felt 1 (10mm thick) with glass fiber as the skeleton and SiO2 as the dispersed phase; a flame-retardant PEVA film 22 (0.2mm thick) bonded to both sides of the flame-retardant gel felt 1 with white latex adhesive; a flame-retardant Oxford cloth 21 (1mm thick) bonded to both sides of the flame-retardant PEVA film 22 with white latex adhesive; and a 20mm gap bonded to one side of the flame-retardant Oxford cloth 21 with neoprene rubber adhesive. The structure consists of evenly spaced magnets 3 (2mm thick, 20mm wide, and 1000mm long), a flame-retardant spunlace nonwoven fabric 42 (1mm thick) bonded to one side of the magnets 3 with neoprene rubber adhesive, and a PE aluminum foil layer 41 (0.5mm thick) bonded to one side of the flame-retardant spunlace nonwoven fabric 42 with white latex adhesive. The structure is then wrapped with an inner edge of flame-retardant PEVA film (0.2mm thick) and an outer edge of flame-retardant Oxford cloth (1mm thick) bonded with white latex adhesive.
[0057] Multiple thermal conductivity tests were conducted on the flame-retardant gel felt 1, and its thermal conductivity λ was found to be 0.03~0.06W / (m·K), which is far lower than the new national standard for thermal insulation materials λ0<0.175W / (m·K).
[0058] The detachable composite high-temperature mine insulation felt in this embodiment was tested through a thermal environment simulation experiment. The insulation performance was simulated under normal temperature conditions (20℃) and rock wall temperatures of 50℃, 45℃, 40℃, 35℃, and 30℃. Temperature data at various points on the insulation felt were collected using a channel temperature monitoring instrument. After the temperature stabilized (approximately 30 minutes), the experimental results were recorded. The experimental results are shown in Table 1 (temperature values are averaged).
[0059] Table 1. Experimental results of thermal insulation performance of detachable composite high-temperature mine insulation felt.
[0060] Simulated rock wall temperature (°C) Surface temperature of thermal insulation felt (°C) Temperature difference (°C) 50.0 29.1 20.9 45.0 27.1 17.9 40.0 25.8 14.2 35.0 24.1 10.9 30.0 22.6 7.4
[0061] As can be seen from Table 1, the heat insulation felt in this embodiment has a good heat insulation effect, which can effectively isolate the high temperature of the rock mass, improve the working environment of the working face, and reduce the pressure of ventilation and cooling.
[0062] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.
Claims
1. A demountable composite high temperature mine heat insulating blanket, characterized in that, The main body structure comprises, from top to bottom, a magnetic attraction protective layer, a magnetic attraction layer, a first main material protective layer, a main material layer, and a second main material protective layer; the main material layer comprises a fire-retardant aerogel felt; the first main material protective layer comprises, from top to bottom, a first fire-retardant oxford cloth and a first fire-retardant PEVA film; the second main material protective layer comprises, from top to bottom, a second fire-retardant PEVA film and a second fire-retardant oxford cloth; the magnetic attraction layer comprises a plurality of spaced-apart magnets; and the magnetic attraction protective layer comprises, from top to bottom, a PE aluminum foil layer and a fire-retardant spunlace nonwoven fabric, and the PE aluminum foil layer is configured to contact a roadway rock wall.
2. A demountable composite high temperature mine insulation blanket according to claim 1, characterised in that, The fire-retardant aerogel felt has a thickness of 8-12 mm.
3. A demountable composite high temperature mine insulation blanket according to claim 2, characterised in that, The first fire-retardant oxford cloth has a thickness of 0.8-1.2 mm, and the first fire-retardant PEVA film has a thickness of 0.18-0.22 mm; the second fire-retardant oxford cloth has a thickness of 0.8-1.2 mm, and the second fire-retardant PEVA film has a thickness of 0.18-0.22 mm.
4. The detachable composite high temperature mine heat insulating blanket of claim 1, wherein, The magnets are in the form of strips and are arranged uniformly at the same interval.
5. A demountable composite high temperature mine insulation blanket according to claim 4, characterised in that, The magnets have a thickness of 1.8-2.2 mm, a width of 18-22 mm, and a length equal to that of the heat insulation felt; and the interval is 18-22 mm.
6. The detachable composite high temperature mine shaft insulation blanket of claim 1, wherein, The PE aluminum foil layer has a thickness of 0.3-0.7 mm, and the fire-retardant spunlace nonwoven fabric has a thickness of 0.8-1.2 mm.
7. The detachable composite high temperature mine heat insulating blanket of claim 1, wherein, The edge cover comprises, from outside to inside, a third fire-retardant oxford cloth and a third fire-retardant PEVA film.
8. A demountable composite high temperature mine insulation blanket according to claim 7, characterised in that, The third fire-retardant oxford cloth has a thickness of 0.8-1.2 mm, and the third fire-retardant PEVA film has a thickness of 0.18-0.22 mm.
9. The detachable composite high temperature mine shaft insulation blanket of claim 1, wherein, The layers further comprise an adhesive layer.
10. The detachable composite high temperature mine shaft insulation blanket of claim 1, wherein, The size of the insulation mat is 1 m 1 m or 1 m 2 m.