Sandwich type composite armor plate, preparation method, anti-explosion unit and anti-explosion wall

Abstract

The invention discloses a sandwich type composite armor plate, which belongs to the technical field of composite materials and comprises an outer layer, an inner layer and an outer layer, and the outer layer is a composite plate made of woven glass fibers mixed with a resin matrix composite material; the inner layer is fixed to the inner side of the outer layer, and the inner layer is of a composite structure with a foam concrete plate as a base body, a bulletproof steel mesh as a framework and geotechnical cloth wrapping. A woven glass fiber composite material plate is used as an outer layer (bulletproof layer) of the explosion-proof wall, and a foam concrete plate with an inner layer (buffer layer) and a bulletproof steel mesh as a framework is added to form a composite armor plate for resisting impact load; the foam concrete plate can further absorb and disperse the transmission of the impact load to prevent the impact load from being transmitted to the interior; the structure can be prevented from being excessively stressed in a single area, so that the impact resistance of the whole material is improved; the preparation method is simple, the process is stable, and the requirement of mass production can be met. And meanwhile, the adopted light material is convenient to install and use in a complex environment.

Description

Technical Field

[0001] The present invention relates to a sandwich composite armor plate, a preparation method, an explosion-proof unit and an explosion-proof wall, belonging to the technical field of composite materials. Background Art

[0002] Nowadays, with the rapid evolution of weaponry, there are more and more miniaturized and unmanned forces, and the threat of explosion shock to important targets is becoming increasingly serious; there is an urgent need for a light protection force that can withstand certain strikes; at the same time, it can be quickly deployed and conveniently transported to adapt to the increasingly harsh explosion shock environment. Although traditional quickly assembled explosion-proof walls can meet certain requirements, their anti-penetration performance is weak. In order to provide more secure protection measures and at the same time have the characteristics of light weight, a composite explosion-proof wall with a gradient energy absorption structure is proposed. The present invention is of great significance for broadening the application scope of explosion-proof walls and enhancing the safety factor of important targets. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a sandwich composite armor plate, a preparation method, an explosion-proof unit and an explosion-proof wall.

[0004] To solve the above technical problems, the present invention is implemented by the following technical solutions.

[0005] In the first aspect, the present invention discloses a sandwich composite armor plate, including: An outer layer, which is a composite material plate made of a woven glass fiber mixed with a resin matrix composite material; An inner layer, which is fixed inside the outer layer, and the inner layer adopts a composite structure with a foam concrete plate as the matrix, a bulletproof steel mesh as the skeleton, and is wrapped with geotextile.

[0006] Further, the composite material plate includes the following raw materials in parts by mass: 35-45 parts of woven glass fiber, 50-60 parts of resin matrix, 1-2 parts of graphene, and 3-5 parts of auxiliary agent.

[0007] Further, the resin matrix is a mixed resin including vinyl ester resin and epoxy resin, and the mass ratio is: vinyl ester resin: epoxy resin = 5-6: 3-4.

[0008] Further, the auxiliary agent is a mixture including a surfactant, a curing agent and a graphene filler, and the mass ratio is: surfactant: curing agent: graphene filler = 1-3: 1-3: 2-4.

[0009] Further, the preparation method of the composite structure includes: Mix vinyl ester resin, epoxy resin, interfacial activator, and curing agent according to the corresponding mass parts, then put in graphene filler, and use magnetic field to orient graphene to obtain the matrix material; Put the woven glass fiber of the corresponding mass parts into a container, pour in the mixed matrix material and cover the surface of the entire woven glass fiber cloth to obtain the impregnated material; Place the impregnated material in an environment of 140 - 150 °C and heat for 3 - 4 h, end the heating, and demold after cooling to obtain the composite material board.

[0010] Furthermore, the foam concrete board comprises the following raw materials in mass parts: 55 - 60 parts of portland cement, 12 - 15 parts of fly ash, 3 - 5 parts of composite foaming agent, 3 - 5 parts of silica sol, 50 - 55 parts of quartz sand, 4 - 10 parts of composite fiber, and 40 - 50 parts of water.

[0011] Furthermore, the preparation method of the foam concrete board comprises: Mix the corresponding mass parts of portland cement, fly ash, quartz sand, composite fiber, and a part of the mass parts of water evenly to obtain cement slurry; Add the corresponding mass parts of composite foaming agent and the remaining mass parts of water to foam in a foam machine, then add the corresponding mass parts of silica sol, mix evenly and pour into a cuboid block mold with bulletproof steel mesh inside. After molding, carry out steam curing to obtain the foam concrete board.

[0012] In the second aspect, the present invention discloses a preparation method of a sandwich composite armor plate, comprising the following steps: Clean and dry the composite material board, bulletproof steel mesh, and foam concrete board; Evenly apply the adhesive on the surface of the foam concrete board, and then use a hot press to press the surfaces of the composite material board and the foam concrete board tightly to ensure there are no gaps to obtain a formed blank; Wrap the inner layer of the formed blank with geotextile, and use hot melt welding at the joints to obtain the sandwich composite armor plate.

[0013] In the third aspect, the present invention discloses a composite explosion-proof unit surrounded by four sandwich composite armor plates described in the second aspect.

[0014] In the fourth aspect, the present invention discloses a composite explosion-proof wall spliced by several composite explosion-proof units described in the third aspect.

[0015] The beneficial effects achieved by the present invention: (1) The present invention uses a woven fiberglass composite material board as the outer layer (bullet-proof layer) of the explosion-proof wall, and adds an inner layer (buffer layer) of a foam concrete board with a bullet-proof steel mesh as the skeleton to form a composite armor board for resisting impact loads. By utilizing the good ability of GFRP (GFRP, Glass Fiber Reinforced Plastic) material to resist impact loads, part of the energy of explosion or impact is absorbed, reducing the stress transmitted to the foam concrete board, and the foam concrete board can further absorb and disperse the transmission of the impact load to prevent the impact load from being transmitted to the interior.

[0016] (2) The GFRP material used in the present invention has the characteristics of high temperature resistance and corrosion resistance. After being combined with the foam concrete board, it can significantly extend the service life of the structure. The foam concrete board can also provide a supporting effect for the composite material board to prevent the structure from being overloaded in a single area and improve the impact resistance of the overall material.

[0017] (3) The preparation method of the present invention is simple and the process is stable, which can meet the needs of mass production. At the same time, the lightweight materials used are convenient for installation and use in complex environments. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the material composition structure of the composite material armor board; Figure 2 It is a schematic diagram of the assembled composite explosion-proof unit structure.

[0019] In the figure: 1 - composite material board; 2 - composite structure; 21 - foam concrete board; 22 - bullet-proof steel mesh; 23 - geotextile. Detailed Embodiments

[0020] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0023] Embodiment 1. This embodiment introduces a sandwich composite armor plate, including: An outer layer, which is a composite material plate 1 made of woven glass fiber mixed with a resin matrix composite material; An inner layer, which is fixed inside the outer layer. The inner layer adopts a composite structure 2 with a foam concrete plate 21 as the matrix, a bulletproof steel mesh 22 as the skeleton, and a geotextile 23 wrapped around it.

[0024] The composite material plate includes the following raw materials in parts by mass: 1.77 kg of woven glass fiber, 2.53 kg of resin matrix, 0.05 kg of graphene, and 0.15 kg of auxiliary agent.

[0025] The resin matrix is a mixed resin including vinyl ester resin and epoxy resin, and the mass ratio is: vinyl ester resin: epoxy resin = 5:3.

[0026] The auxiliary agent is a mixture including a surfactant, a curing agent, and a graphene filler, and the mass ratio is: surfactant: curing agent: graphene filler = 1:1:2.

[0027] The preparation method of the composite structure includes: Mix vinyl ester resin, epoxy resin, interfacial activator, and curing agent according to the corresponding masses, then add graphene filler, and use magnetic field to align graphene directionally to obtain a matrix material; Put the woven glass fiber with the corresponding mass fraction into a container, pour in the mixed matrix material and cover the surface of the entire woven glass fiber cloth to obtain an impregnated material; Place the impregnated material in an environment of 140 - 150 °C and heat for 3 - 4 h. After heating is completed, cool and demold to obtain a composite material board.

[0028] The foam concrete board comprises the following raw materials in mass fractions: 1.32 kg of portland cement, 0.29 kg of fly ash, 0.07 kg of composite foaming agent, 0.07 kg of silica sol, 1.2 kg of quartz sand, 0.1 kg of composite fiber, and 0.96 kg of water.

[0029] The preparation method of the foam concrete board includes: Mix 1.32 kg of portland cement, 0.29 kg of fly ash, 1.2 kg of quartz sand, 0.1 kg of composite fiber, and about 0.64 kg of water evenly to obtain cement slurry; Add 0.07 kg of composite foaming agent and 0.32 kg of water to foam in a foam machine, then add 0.07 - 0.12 kg of silica sol, mix evenly and pour into a cuboid block mold with bulletproof steel mesh inside. After molding, perform steam curing to obtain a foam concrete board.

[0030] Example 2. This example introduces a sandwich - type composite armor plate, including: An outer layer, which is a composite material board 1 made of woven glass fiber mixed with resin - based composite material; An inner layer, which is fixed inside the outer layer. The inner layer adopts a composite structure 2 with a foam concrete board 21 as the matrix, a bulletproof steel mesh 22 as the skeleton, and a geotextile 23 wrapped around it.

[0031] The composite material board comprises the following raw materials in mass fractions: 2 kg of woven glass fiber, 2.8 kg of resin matrix, 0.08 kg of graphene, and 0.2 kg of auxiliary agent.

[0032] The resin matrix is a mixed resin including vinyl ester resin and epoxy resin, and the mass ratio is: vinyl ester resin: epoxy resin = 5.5:3.5.

[0033] The auxiliary agent is a mixture including surfactant, curing agent, and graphene filler, and the mass ratio is: surfactant: curing agent: graphene filler = 2:2:3.

[0034] The preparation method of the composite structure includes: Mix vinyl ester resin, epoxy resin, interfacial activator, and curing agent according to the corresponding mass parts, then put in graphene filler, and use magnetic field to orient graphene to obtain the matrix material; Put the woven glass fiber of the corresponding mass parts into a container, pour in the mixed matrix material and cover the surface of the entire woven glass fiber cloth to obtain the impregnated material; Place the impregnated material in an environment of 140 - 150 °C and heat for 3 - 4 h, end the heating, and demold after cooling to obtain the composite material board.

[0035] The foam concrete board comprises the following raw materials in mass parts: 1.4 kg of portland cement, 0.32 kg of fly ash, 0.1 kg of composite foaming agent, 0.1 kg of silica sol, 1.27 kg of quartz sand, 0.2 kg of composite fiber, and 1.1 kg of water.

[0036] The preparation method of the foam concrete board includes: Mix 1.4 kg of portland cement, 0.32 kg of fly ash, 1.27 kg of quartz sand, 0.2 kg of composite fiber, and 0.7 kg of water evenly to obtain cement slurry; Add 0.1 kg of composite foaming agent and 0.4 kg of water to foam in a foam machine, then add 0.07 - 0.12 kg of silica sol, mix evenly and pour into a cuboid block mold with bulletproof steel mesh inside. After molding, perform steam curing to obtain the foam concrete board.

[0037] Example 3, this example introduces a sandwich - type composite armor plate, including: An outer layer, the outer layer is a composite material board 1 made of woven glass fiber mixed with resin - based composite material; An inner layer, the inner layer is fixed inside the outer layer, and the inner layer adopts a composite structure 2 with a foam concrete board 21 as the matrix, a bulletproof steel mesh 22 as the skeleton, and a geotextile 23 wrapped around it.

[0038] The composite material board comprises the following raw materials in mass parts: 2.27 kg of woven glass fiber, 3.04 kg of resin matrix, 0.1 kg of graphene, and 0.25 kg of auxiliary agent.

[0039] The resin matrix is a mixed resin including vinyl ester resin and epoxy resin, and the mass ratio is: vinyl ester resin: epoxy resin = 6:4.

[0040] The auxiliary agent is a mixture including surfactant, curing agent, and graphene filler, and the mass ratio is: surfactant: curing agent: graphene filler = 3:3:4.

[0041] The preparation method of the composite structure includes: Mix vinyl ester resin, epoxy resin, interfacial activator, and curing agent according to the corresponding mass parts, then put in graphene filler, and use magnetic field to orient graphene to obtain a matrix material; Put the woven glass fiber with the corresponding mass parts into a container, pour in the mixed matrix material and cover the surface of the entire woven glass fiber cloth to obtain an impregnated material; Place the impregnated material in an environment of 140 - 150 °C and heat for 3 - 4 h, end the heating, and demold after cooling to obtain a composite material board.

[0042] The foam concrete board includes the following raw materials in mass parts: 1.44 kg of portland cement, 0.36 kg of fly ash, 0.12 kg of composite foaming agent, 0.12 kg of silica sol, 1.32 kg of quartz sand, 0.25 kg of composite fiber, and 1.2 kg of water.

[0043] The preparation method of the foam concrete board includes: Mix 1.44 kg of portland cement, 0.36 kg of fly ash, 1.32 kg of quartz sand, 0.25 kg of composite fiber, and 0.8 kg of water evenly to obtain cement slurry; Add 0.12 kg of composite foaming agent and 0.4 kg of water to foam in a foam machine, then add 0.12 kg of silica sol, mix evenly and pour into a cuboid block mold with bulletproof steel mesh inside. After molding, carry out steam curing to obtain a foam concrete board.

[0044] Example 4, the preparation method of a sandwich - type composite armor plate in this example includes the following steps: Clean and dry the composite material board, bulletproof steel mesh, and foam concrete board; Evenly apply the adhesive on the surface of the foam concrete board, and then use a hot press to press the surfaces of the composite material board and the foam concrete board tightly to ensure no gaps; Wrap the inner layer of the formed blank with geotextile (230 g / m² polypropylene material), and use hot melt welding at the joints.

[0045] Example 5, this example introduces a composite explosion - proof unit, as Figure 2 shown, which is surrounded by four sandwich - type composite armor plates as described in Example 1.

[0046] Example 6, this example introduces a composite explosion - proof wall, which is spliced by several composite explosion - proof units as described in Example 5.

[0047] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sandwich composite armor plate, characterized in that: include: An outer layer, wherein the outer layer is a composite material plate made of woven glass fiber mixed with resin-based composite material; The inner layer is fixed to the inner side of the outer layer, and the inner layer adopts a composite structure with a foam concrete board as a matrix, a bulletproof steel mesh as a skeleton, and geotextile wrapped.

2. The sandwich composite armor plate according to claim 1, characterized in that: The composite material plate comprises the following raw materials in parts by mass: 35-45 parts of woven glass fiber, 50-60 parts of resin matrix, 1-2 parts of graphene, and 3-5 parts of auxiliary agent.

3. The sandwich composite armor plate according to claim 2, characterized in that: The resin matrix is ​​a mixed resin including vinyl ester resin and epoxy resin, and the mass ratio is: vinyl ester resin: epoxy resin = 5-6:3-4.

4. The sandwich composite armor plate according to claim 3, characterized in that: The auxiliary agent is a mixture including a surfactant, a curing agent and a graphene filler, and the mass ratio is: surfactant: curing agent: graphene filler = 1-3: 1-3: 2-4.

5. The sandwich composite armor plate according to claim 4, characterized in that: The method for preparing the composite structure comprises: Vinyl ester resin, epoxy resin, interfacial activator and curing agent are mixed according to corresponding weight parts, and then graphene filler is added, and the graphene is arranged in a magnetic field to obtain a matrix material; Putting the corresponding mass fraction of woven glass fiber into a container, pouring the mixed matrix material into the container and covering the entire surface of the woven glass fiber cloth to obtain an impregnated material; The impregnated material is placed in an environment of 140-150° C. and heated for 3-4 hours. After heating is terminated, the material is demoulded after cooling to obtain a composite material plate.

6. The sandwich composite armor plate according to claim 1, characterized in that: The foam concrete board comprises the following raw materials in parts by weight: 55-60 parts of silicate cement, 12-15 parts of fly ash, 3-5 parts of composite foaming agent, 3-5 parts of silica sol, 50-55 parts of quartz sand, 4-10 parts of composite fiber and 40-50 parts of water.

7. The sandwich composite armor plate according to claim 6, characterized in that: The method for preparing the foam concrete board comprises: The corresponding mass fractions of silicate cement, fly ash, quartz sand, composite fiber and a portion of mass fraction of water are uniformly mixed to obtain cement slurry; The corresponding mass fraction of composite foaming agent is added with the remaining mass fraction of water to be foamed in a foaming machine, and then the corresponding mass fraction of silica sol is added, mixed evenly and poured into a rectangular block mold with a bulletproof steel mesh, and steam cured after molding to obtain a foam concrete board.

8. A method for preparing the sandwich composite armor plate according to claim 7, characterized in that: The steps include: Cleaning and drying composite panels, bulletproof steel mesh, foam concrete panels; The adhesive is evenly coated on the surface of the foam concrete board, and then the surfaces of the composite material board and the foam concrete board are pressed tightly by a hot press to ensure that there are no gaps, thereby obtaining a formed body; The inner layer of the formed blank is wrapped with geotextile, and the joints are hot-melt welded to obtain a sandwich composite armor plate.

9. A composite explosion-proof unit, characterized in that: It is surrounded by four sandwich composite armor plates as described in any one of claims 1 to 7.

10. A composite explosion-proof wall, characterized in that: It is composed of several composite explosion-proof units as described in claim 9.

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