Composite coating for ammunition depot wall protection
By applying composite coatings on the walls of the ammunition warehouse, including flame retardant polyurea layer and explosion-resistant polyurea layer, the flame retardant and explosion-proof problems of traditional walls during explosions are solved, and the protection capabilities of the wall are improved.
Patent Information
- Application Number
- CN202421582477.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The walls of traditional ammunition warehouses cannot effectively retardant and explosion-proof when exploded, which can easily cause flame spread and damage to explosion waves, shock waves, etc.
A composite coating structure is adopted, including a primer layer, a flame-retardant polyurea layer, a reinforcement layer and a explosion-resistant polyurea layer. By setting a reinforcement layer between the flame-retardant polyurea layer and a explosion-resistant polyurea layer, and forming a pit structure on the reinforcement layer, the flame-retardant polyurea layer is used to delay the spread of combustion, and the explosion-resistant polyurea layer enhances the structural strength.
The flame retardant effect and explosion-proof capability of the walls of the ammunition warehouse are enhanced, the impact damage of the explosion on the walls is reduced, and the protection capability of the overall structure is improved.
Smart Images
Figure CN223075066U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of protective coatings, and particularly relates to a composite coating for protecting the wall of an ammunition storage. Background Art
[0002] An ammunition storage refers to a building for storing ammunition and explosives in military facilities, that is, a place for storing ammunition or other explosives. An ammunition storage is a special warehouse for storing particularly dangerous goods such as ammunition. Ammunition has properties such as flammability and explosiveness, and is extremely likely to cause safety accidents such as explosions under the influence of external factors such as heat, friction, vibration, collision, and exposure to the sun. After an explosion occurs, the factors that cause damage to the walls of the ammunition storage and the surrounding environment can generally be divided into: flame, earthquake, explosion wave, product, air shock wave, and flying fragments (crushed stones), etc.
[0003] Therefore, in order to ensure the safety of ammunition storages and the surrounding environment, effective fire prevention and explosion protection and other protective measures should be adopted. The walls of traditional ammunition storages are mostly made of reinforced concrete building structures. When an explosion occurs, traditional ammunition storages cannot effectively prevent fire and explosion, are prone to flame spread, and cannot effectively block explosion waves, shock waves, and flying fragments. Summary of the Utility Model
[0004] The utility model provides a composite coating for protecting the wall of an ammunition storage, aiming to solve the problem that traditional ammunition storages at present cannot effectively prevent fire and explosion.
[0005] The utility model is realized as follows. A composite coating for protecting the wall of an ammunition storage includes:
[0006] A primer layer, which is formed on a concrete wall;
[0007] A flame-retardant polyurea layer and an explosion-proof polyurea layer. The flame-retardant polyurea layer is formed on the surface of the primer layer. An enhancement layer is also provided between the flame-retardant polyurea layer and the explosion-proof polyurea layer. The enhancement layer forms a number of groups of pits on the surface of the flame-retardant polyurea layer, and the pits are filled with the explosion-proof polyurea layer.
[0008] Preferably, the enhancement layer is a fiber mesh cloth. The enhancement layer is evenly distributed with mesh holes of the same size, and the mesh holes form the pits. The thickness of the enhancement layer is 0.5 - 1.5 mm.
[0009] Preferably, the thickness of the flame-retardant polyurea layer and the explosion-proof polyurea layer is 1.5 - 2.5 mm.
[0010] Preferably, the flame-retardant polyurea layer includes aromatic isocyanate, polyether polyol, amine chain extender, anti-aging additive, and composite flame retardant.
[0011] Preferably, the fiber mesh cloth is one of glass fiber mesh cloth, polyester fiber mesh cloth, polyamide fiber mesh cloth, polyacrylonitrile fiber mesh cloth, and carbon fiber mesh cloth.
[0012] Preferably, the anti-explosion polyurea layer is made of nano-materials and high-strength polyurea matrix resin.
[0013] Preferably, the primer layer is a low-viscosity epoxy primer specific for concrete.
[0014] Preferably, the mesh shape of the fiber mesh cloth is one or a combination of more than one of circular, semi-circular, triangular, quadrilateral, and pentagonal.
[0015] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:
[0016] 1. The composite coating for protecting the wall of an ammunition depot provided by the present utility model adds a flame-retardant polyurea layer between the anti-explosion polyurea layer and the primer layer. When an explosion and combustion occur, the flame-retardant polyurea layer delays the combustion time and prevents the spread of combustion, enhancing the flame-retardant effect of the composite coating and improving the protection ability of the wall of the ammunition depot.
[0017] 2. The composite coating for protecting the wall of an ammunition depot provided by the present utility model forms a concave pit frame structure through the meshes on the reinforcing layer. During the spraying process, the anti-explosion polyurea layer fills the concave pits and forms a complex three-dimensional surface structure outside the flame-retardant polyurea layer, improving the overall structural strength of the coating and enhancing the protection ability of the composite coating. Description of the Drawings
[0018] Figure 1 is a schematic structural diagram of a composite coating for protecting the wall of an ammunition depot provided by the present utility model.
[0019] Figure 2 is an exploded structural diagram of a composite coating for protecting the wall of an ammunition depot provided by the present utility model.
[0020] Description of the Reference Numerals:
[0021] 1. Anti-explosion polyurea layer; 2. Reinforcing layer; 3. Flame-retardant polyurea layer; 4. Primer layer; 5. Concrete wall. Detailed Embodiments
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.
[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0024] An embodiment of the present utility model provides a composite coating for protecting the wall of an ammunition storage room, as Figure 1 - Figure 2 shown. The composite coating for protecting the wall of an ammunition storage room is applied to a concrete wall 5 and includes:
[0025] A primer layer 4, and the primer layer 4 is formed on the concrete wall 5;
[0026] A flame-retardant polyurea layer 3, and the flame-retardant polyurea layer 3 is formed on the surface of the primer layer 4;
[0027] A reinforcing layer 2, and the reinforcing layer 2 is a fiber mesh cloth attached to the side of the flame-retardant polyurea layer 3 away from the primer layer 4. The mesh holes on the fiber mesh cloth form several groups of pits on the surface of the flame-retardant polyurea layer 3;
[0028] An explosion-proof polyurea layer 1, and the explosion-proof polyurea layer 1 is formed on the surface of the reinforcing layer 2. During the formation of the explosion-proof polyurea layer 1, the pits are filled to form a complex frame structure.
[0029] In this embodiment, the flame-retardant polyurea layer 3 includes aromatic isocyanate, polyether polyol, amine chain extender, anti-aging additive, and composite flame retardant. The flame-retardant polyurea layer 3 delays the combustion time and prevents the spread of combustion during an explosion and combustion, enhances the flame-retardant effect of the composite coating, and improves the protection ability of the wall of the ammunition storage room; while the explosion-proof polyurea layer 1 and the reinforcing layer 2 form a complex frame structure surface, further enhancing the overall structural strength of the coating, enhancing the protection ability of the composite coating, improving the anti-impact force against explosion, reducing the impact damage to the wall, and the composite coating for protecting the wall of the ammunition storage room is coated on the outer wall of the concrete wall 5;
[0030] The reinforcing layer 2 is a fiber mesh cloth. The same-sized mesh holes are evenly distributed on the reinforcing layer 2, and the mesh holes form pits. The thickness of the reinforcing layer 2 is 0.5 - 1.5 mm; the thicknesses of the flame-retardant polyurea layer 3 and the blast-resistant polyurea layer 1 are 1.5 - 2.5 mm. During the processing, the reinforcing layer 2 is first attached to the surface of the flame-retardant polyurea layer 3. When the blast-resistant polyurea layer 1 is sprayed, it will first fill the pit structure on the reinforcing layer 2 and then form a layer structure with a thickness of 1.5 - 2.5 mm;
[0031] As a preferred embodiment in this example, the fiber mesh cloth is one of a glass fiber mesh cloth, a polyester fiber mesh cloth, a polyamide fiber mesh cloth, a polyacrylonitrile fiber mesh cloth, and a carbon fiber mesh cloth; the mesh shape of the fiber mesh cloth is one or a combination of a circle, a semi-circle, a triangle, a quadrilateral, and a pentagon;
[0032] As a preferred embodiment in this example, the production process of the flame-retardant polyurea layer 3 is as follows:
[0033] S1. Under inert conditions, 50 parts by weight of polypropylene oxide glycol with a molecular weight of 2000 is heated to 100 - 120 °C and dehydrated under a vacuum negative pressure (-0.1 MPa) for at least 0.5 h until no bubbles are generated; then it is cooled to 50 - 60 °C, and 50 parts by weight of diphenylmethane diisocyanate is added, and the reaction is carried out at 80 - 90 °C for 1.5 - 2 h to obtain the semi-prepolymer A component;
[0034] S2. 50 parts by weight of polypropylene oxide glycol with a molecular weight of 1000, 20 parts of 3,5-diethyltoluene diamine, 20 parts of a composite flame retardant (including 10 parts of phenyl-terminated amino polyphosphate with a benzene ring, 5 parts of halogen-free phenyl phosphate, and 5 parts of 80-mesh graphite), 5 parts of a water remover, 1.5 parts of an anti-aging agent, 3 parts of a color paste, and 0.5 part of a catalyst are dispersed and stirred evenly to obtain the B component;
[0035] S3. The above A and B components are sprayed on the side of the primer layer 4 by a spraying device according to a volume ratio of 1:1 to prepare the flame-retardant polyurea layer 3.
[0036] As a preferred embodiment in this example, the production process of the blast-resistant polyurea layer 1 is as follows:
[0037] S1. Under inert conditions, 30 parts by weight of polytetrahydrofuran ether glycol with a molecular weight of 1000 is heated to 100 - 120 °C and dehydrated under a vacuum negative pressure (-0.1 MPa) for at least 0.5 h until no bubbles are generated; then it is cooled to 50 - 60 °C, and 70 parts by weight of diphenylmethane diisocyanate (MDI-50 and MDI-100 with a mass ratio of 1:1) is added, and the reaction is carried out at 80 - 90 °C for 1.5 - 2 h to obtain the semi-prepolymer C component;
[0038] S2. Weigh 58 parts by weight of polytetrahydrofuran ether glycol with a molecular weight of 1000, 19 parts of 3,5 - diethyltoluene diamine, 8 parts of chain extender Wana l i nk6200, 6 parts of 3,3'-dichloro - 4,4'-diaminodiphenylmethane, 0.5 part of amino - functionalized carbon nanotubes, 5 parts of water scavenger, 3 parts of color paste, and 0.5 part of catalyst, and disperse them evenly by high - speed stirring, then continue to disperse them evenly by ultrasonic treatment to obtain Component D.
[0039] S3. Spray Component C and Component D onto the reinforcement layer 2 in a volume ratio of 1:1 to prepare the explosion - resistant polyurea layer 1.
[0040] The manufacturing method of the composite coating of this application is as follows:
[0041] Step 1. Prepare the primer layer 4, specifically spray a special low - viscosity epoxy primer for concrete, and spray the epoxy primer on the selected wall surface to form the primer layer 4.
[0042] Step 2. Prepare Components A and B in the above - mentioned manner, and use a spraying device to spray them on the side of the primer layer 4 in a volume ratio of 1:1 to prepare the flame - retardant polyurea layer 3.
[0043] Step 3. Prepare the reinforcement layer 2, specifically embed the fiber mesh cloth before the surface of the flame - retardant polyurea layer 3 becomes dry to obtain the reinforcement layer 2.
[0044] Step 4. Prepare Components C and D in the above - mentioned manner and spray them on the reinforcement layer 2 in a volume ratio of 1:1 to prepare the explosion - resistant polyurea layer 1, thus completing the preparation of the composite coating.
[0045] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be carried out in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.
[0046] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the utility model. Obviously, the described embodiments are only partial embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add or delete the features in the embodiments of the present utility model according to the situation or make other adjustments, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model, and these technical solutions also belong to the scope of protection of the present utility model.
Claims
1. A composite coating for the wall protection of an ammunition depot, characterized in that, Comprising: A primer layer (4), which is formed on a concrete wall (5); A flame-retardant polyurea layer (3) and an explosion-resistant polyurea layer (1). The flame-retardant polyurea layer (3) is formed on the surface of the primer layer (4). An enhanced layer (2) is further provided between the flame-retardant polyurea layer (3) and the explosion-resistant polyurea layer (1). The enhanced layer (2) forms a plurality of groups of pits on the surface of the flame-retardant polyurea layer (3), and the explosion-resistant polyurea layer (1) is filled in the pits.
2. The composite coating for protecting the wall of an ammunition storage as described in claim 1, characterized in that, The enhanced layer (2) is a fiber mesh cloth. The enhanced layer (2) is evenly distributed with mesh holes of the same size, and the mesh holes form the pits. The thickness of the enhanced layer (2) is 0.5 to 1.5 mm.
3. The composite coating for protecting the wall of an ammunition storage as claimed in claim 2, characterized in that, The thicknesses of the flame-retardant polyurea layer (3) and the explosion-resistant polyurea layer (1) are 1.5 to 2.5 mm.
4. The composite coating for protecting the wall of an ammunition storage as claimed in claim 3, wherein The fiber mesh cloth is one of a glass fiber mesh cloth, a polyester fiber mesh cloth, a polyamide fiber mesh cloth, a polyacrylonitrile fiber mesh cloth, and a carbon fiber mesh cloth.
5. The composite coating for protecting the wall of an ammunition storage as described in claim 4, characterized in that, The primer layer (4) is a low-viscosity epoxy primer special for concrete.
6. The composite coating for protecting the wall of an ammunition storage as claimed in claim 5, wherein, The mesh shape of the fiber mesh cloth is one or a combination of more of a circle, a semicircle, a triangle, a quadrilateral, and a pentagon.