Fireproof coating composite structure

Abstract

The utility model discloses a fireproof coating composite structure, and relates to the technical field of fireproof coatings. The fireproof structure comprises a waterproof structure, the waterproof structure is coated on the surface of a tunnel wall, the surface of the waterproof structure is coated with a molten coating, the surface of the molten coating is respectively coated with a first incombustible fireproof coating and a second incombustible fireproof coating along the axial direction of the tunnel, the surface of the first incombustible fireproof coating is coated with an expansion fireproof coating, and the surface of the second incombustible fireproof coating is coated with an expansion fireproof coating. And the surfaces of the expansion fireproof coating and the second non-combustible fireproof coating are coated with wear-resistant layers. According to the utility model, the second non-combustible fireproof coating adjacent to the expansion fireproof coating forms a fire insulation zone, so that the expansion fireproof coating prevents fire from spreading quickly before playing a fireproof role, the fire is controlled within a certain range, and then the expansion fireproof coating is heated and expanded to form a foam layer for isolating oxygen and a heat insulation layer, so that the fire insulation effect is improved. Therefore, the function of actively suppressing the fire behavior is achieved, fire insulation and fire behavior suppression are both considered, and a good fireproof effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire retardant coatings, in particular to a fire retardant coating composite structure. Background Art

[0002] Fire retardant coatings are special coatings applied to the surface of combustible substrates to change the surface combustion characteristics of the material and prevent the rapid spread of fire; or applied to building components to improve the fire resistance of the components. The fire protection principles of fire retardant coatings are mainly the following: the coating itself is non-flammable, the thermal conductivity of the coating is low, the coating can decompose to produce inert gases when heated, the NO, NH3 and other radicals produced by the thermal decomposition of the coating can interrupt the chain reaction, and the coating expands and foams when heated to form a carbon foam insulation layer to seal the protected object.

[0003] When designing fire prevention in tunnels, due to the special structure of the tunnel, the fire will spread rapidly after it starts inside, so it is necessary to coat the tunnel wall with fire-retardant coating. However, at present, a single type and structure of fire-retardant coating is used in tunnels. Since the flammable liquid solvent contained in the intumescent fire-retardant material is flammable, while the flame retardant and other substances it contains will not burn, after the fire starts, the intumescent fire-retardant material can only play the role of fire-blocking and heat insulation after the solvent evaporates. While waiting for the intumescent fire-retardant material to take effect, there is a risk of rapid spread of the fire. Although the thick non-combustible fire-retardant coating has good fire-isolating properties, it cannot release inert gas or decompose to produce NO, NH3 and other radicals when heated to interrupt the chain reaction like the intumescent fire-retardant coating, so it cannot actively suppress the fire. Therefore, a single type and structure of fire-retardant coating has certain defects when used in tunnels.

[0004] For this purpose, a fire retardant coating composite structure is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the problems mentioned in the above background technology, and the utility model provides a fire retardant coating composite structure.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] A fire retardant coating composite structure comprises a waterproof structure, wherein the waterproof structure is coated on the surface of a tunnel wall, the surface of the waterproof structure is coated with a molten coating, the surface of the molten coating is coated with a first non-combustible fire retardant coating and a second non-combustible fire retardant coating along the axial direction of the tunnel, the surface of the first non-combustible fire retardant coating is coated with an intumescent fire retardant coating, and the surfaces of the intumescent fire retardant coating and the second non-combustible fire retardant coating are coated with a wear-resistant layer.

[0008] Furthermore, the waterproof structure includes a top wall waterproof layer and a bottom waterproof layer, both of which are coated on the surface of the tunnel wall, the molten coating is coated on the surface of the top wall waterproof layer, and the bottom waterproof layer is coated on both ends of the bottom of the top wall waterproof layer, the molten coating, the first non-flammable fire-retardant coating, the expanding fire-retardant coating, the second non-flammable fire-retardant coating and the wear-resistant layer.

[0009] Furthermore, the molten coating comprises low melting point glass powder and a base solvent.

[0010] Furthermore, the axial length of the first non-combustible fire-retardant coating is in the range of 1 to 5 m, and the axial length of the intumescent fire-retardant coating is in the range of 2 to 6 m.

[0011] Furthermore, the sum of the thicknesses of the first non-combustible fire-retardant coating and the intumescent fire-retardant coating is the same as the thickness of the second non-combustible fire-retardant coating.

[0012] Furthermore, the coating thickness of the first non-combustible fire-retardant coating is 6 to 10 mm, the coating thickness of the second non-combustible fire-retardant coating is 13 to 22 mm, and the intumescent fire-retardant coating is a nitrogen-containing intumescent fire-retardant coating.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. When a fire occurs in the tunnel, a fireproof zone is formed by the second non-combustible fireproof coating adjacent to the intumescent fireproof coating, thereby preventing the rapid spread of the fire before the intumescent fireproof coating plays a fireproof role, and controlling the fire within a certain range. Then, the intumescent fireproof coating expands under heat to form a foam layer that isolates oxygen and the heat insulation layer. Depending on the type of intumescent fireproof coating selected, the intumescent fireproof coating can generate inert gas under heat or decompose under heat to generate NO, NH3 and other radicals to interrupt the chain reaction, thereby actively suppressing the fire, taking into account both fire isolation and fire suppression, and having a good fireproof effect;

[0015] 2. Utilize the melting property of the molten coating when heated, and use the molten coating as a high-temperature adhesive to prevent the first non-combustible fire-proof coating, the expanding fire-proof coating and the second non-combustible fire-proof coating from cracking, warping, falling off and dripping at high temperatures, maintain the distribution density of the first non-combustible fire-proof coating, the expanding fire-proof coating and the second non-combustible fire-proof coating, and thus ensure the fireproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a side sectional view of a partial three-dimensional structure of the utility model;

[0018] Figure 3 This utility model Figure 2 A magnified view of the structure of the middle part A;

[0019] Figure numerals: 1. Waterproof structure; 101. Top wall waterproof layer; 102. Bottom waterproof layer; 2. Melt coating; 3. First non-combustible fireproof coating; 4. Expanding fireproof coating; 5. Second non-combustible fireproof coating; 6. Wear-resistant layer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They 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, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figures 1 to 3 As shown, a fire retardant coating composite structure includes a waterproof structure 1, which is coated on the surface of a tunnel wall. The surface of the waterproof structure 1 is coated with a molten coating 2, and the surface of the molten coating 2 is coated with a first non-combustible fire retardant coating 3 and a second non-combustible fire retardant coating 5 along the axial direction of the tunnel, respectively. The surface of the first non-combustible fire retardant coating 3 is coated with an intumescent fire retardant coating 4, and the surfaces of the intumescent fire retardant coating 4 and the second non-combustible fire retardant coating 5 are coated with a wear-resistant layer 6.

[0025] More specifically, the fire retardant coating composite structure is waterproofed by the waterproof structure 1, and the inner layer of the expanded fire retardant coating 4 and the second non-combustible fire retardant coating 5 is protected from wear by the wear-resistant layer 6, thereby extending and ensuring the service life of the expanded fire retardant coating 4 and the second non-combustible fire retardant coating 5. When a fire occurs in the tunnel, a fire barrier is formed by the second non-combustible fire retardant coating 5 adjacent to the expanded fire retardant coating 4, thereby preventing the rapid spread of the fire before the expanded fire retardant coating 4 plays a fireproof role, and controlling the fire within a certain range. Then, the expanded fire retardant coating 4 is heated and expanded to form a foam layer that isolates oxygen and the heat insulation layer, and according to Different types of expanded fire retardant coatings 4 are selected. The expanded fire retardant coatings 4 can generate inert gas when heated or decompose when heated to generate radicals such as NO and NH3 to interrupt the chain reaction, thereby actively suppressing the fire and achieving good fire prevention purposes. The melting property of the molten coating 2 when heated is utilized, and the molten coating 2 is used as a high-temperature adhesive to prevent the first non-combustible fire retardant coating 3, the expanded fire retardant coating 4 and the second non-combustible fire retardant coating 5 from cracking, warping, falling off and dripping at high temperatures, thereby maintaining the distribution density of the first non-combustible fire retardant coating 3, the expanded fire retardant coating 4 and the second non-combustible fire retardant coating 5, thereby ensuring the fire prevention effect.

[0026] The waterproof structure 1 includes a top wall waterproof layer 101 and a bottom waterproof layer 102, both of which are coated on the surface of the tunnel wall, the molten coating 2 is coated on the surface of the top wall waterproof layer 101, and the bottom waterproof layer 102 is coated on the bottom ends of the top wall waterproof layer 101, the molten coating 2, the first non-flammable fire-retardant coating 3, the expanding fire-retardant coating 4, the second non-flammable fire-retardant coating 5 and the wear-resistant layer 6.

[0027] Specifically, the top wall waterproof layer 101 is in contact with the tunnel wall to prevent water seepage in the tunnel, which may cause the molten coating 2, the first non-flammable fire-retardant coating 3, the expanding fire-retardant coating 4, the second non-flammable fire-retardant coating 5 and the wear-resistant layer 6 to become damp and roll off. The bottom waterproof layer 102 provides waterproof protection for the top wall waterproof layer 101, the molten coating 2, the first non-flammable fire-retardant coating 3, the expanding fire-retardant coating 4, the second non-flammable fire-retardant coating 5 and the wear-resistant layer 6 from both ends of the bottom to prevent the fire-retardant coating composite structure from becoming damp and rolling off at both ends, thereby ensuring its fireproof effect.

[0028] The molten coating 2 contains low melting point glass powder and a base solvent.

[0029] Specifically, by utilizing the characteristic that low-melting-point glass powder is easily melted by heat, after a fire occurs, the fluidity of the molten coating 2 increases, making the first non-combustible fire-resistant coating 3 and the second non-combustible fire-resistant coating 5 coated on the surface of the molten coating 2 not easy to crack when heated, thereby ensuring the distribution density of the first non-combustible fire-resistant coating 3 and the second non-combustible fire-resistant coating 5, and then ensuring the distribution density of the expanded fire-resistant coating 4 coated on the surface of the first non-combustible fire-resistant coating 3, thereby ensuring the fireproof effect produced by the cooperation of the first non-combustible fire-resistant coating 3, the expanded fire-resistant coating 4 and the second non-combustible fire-resistant coating 5.

[0030] The axial length of the first non-combustible fire-proof coating 3 is in the range of 1 to 5 m, and the axial length of the intumescent fire-proof coating 4 is in the range of 2 to 6 m.

[0031] Specifically, when multiple fire-retardant coating composite structures are continuously distributed on the tunnel wall surface, the first non-combustible fire-retardant coating 3 and the second non-combustible fire-retardant coating 5 will be distributed adjacent to each other at intervals. The lengths of the first non-combustible fire-retardant coating 3 and the intumescent fire-retardant coating 4 are set according to the length of the tunnel and the air flow rate to ensure that after a fire occurs, the axial length of the second non-combustible fire-retardant coating 5 can effectively serve as a fire barrier.

[0032] The sum of the thicknesses of the first non-combustible fireproof coating 3 and the intumescent fireproof coating 4 is the same as the thickness of the second non-combustible fireproof coating 5 .

[0033] Specifically, the wear-resistant layer 6 can be evenly coated on the surface of the expansion fire retardant coating 4 and the second non-combustible fire retardant coating 5. When the expansion fire retardant coating 4 expands due to heat during a fire, it releases inert gas or decomposes to produce radicals such as NO and NH3 to suppress the fire body and cause a fault in the wear-resistant layer 6. After the fire is extinguished, since the expansion fire retardant coating 4 is coated on the surface of the first non-combustible fire retardant coating 3, and the surface of the first non-combustible fire retardant coating 3 is relatively smooth, the expanded fire retardant coating 4 can be quickly removed and a new expansion fire retardant coating 4 and wear-resistant layer 6 can be applied.

[0034] The coating thickness of the first non-combustible fire-retardant coating 3 is 6-10 mm, the coating thickness of the second non-combustible fire-retardant coating 5 is 13-22 mm, and the intumescent fire-retardant coating 4 is a nitrogen-containing intumescent fire-retardant coating.

[0035] Specifically, the first non-combustible fire retardant coating 3 is used to provide fire protection for the expanding fire retardant coating 4 to prevent the fire from being too large and exceeding the fire protection limit of the expanding fire retardant coating 4. The fire retardant coating composite structure quickly breaks down and fails at the coating of the expanding fire retardant coating 4. The expanding fire retardant coating 4 is decomposed by heat to produce radicals such as NO and NH3, which can interrupt the chain reaction and suppress the combustion of the fire body.

[0036] In summary: when a fire occurs in the tunnel, a fireproof zone is formed by the second non-combustible fireproof coating 5 distributed adjacent to the expandable fireproof coating 4, thereby preventing the rapid spread of fire before the expandable fireproof coating 4 plays a fireproof role, and controlling the fire within a certain range. Then, the expandable fireproof coating 4 is heated and expanded to form a foam layer that isolates oxygen and a heat-insulating layer. Depending on the type of the selected expandable fireproof coating 4, the expandable fireproof coating 4 can generate inert gas when heated or decompose when heated to generate NO, NH3 and other radicals to interrupt the chain reaction, thereby actively suppressing the fire, taking into account both fire isolation and fire suppression, and having a good fireproof effect; and utilizing the characteristics of the molten coating 2 that melts when heated, the molten coating 2 is used as a high-temperature adhesive to prevent the first non-combustible fireproof coating 3, the expandable fireproof coating 4 and the second non-combustible fireproof coating 5 from cracking, warping, falling off, and dripping at high temperatures, thereby maintaining the distribution density of the first non-combustible fireproof coating 3, the expandable fireproof coating 4 and the second non-combustible fireproof coating 5, thereby ensuring the fireproof effect.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A fire retardant coating composite structure, characterized in that: The invention comprises a waterproof structure (1), wherein the waterproof structure (1) is coated on the surface of a tunnel wall, the surface of the waterproof structure (1) is coated with a molten coating (2), the surface of the molten coating (2) is coated with a first non-combustible fireproof coating (3) and a second non-combustible fireproof coating (5) along the axial direction of the tunnel, the surface of the first non-combustible fireproof coating (3) is coated with an intumescent fireproof coating (4), and the surfaces of the intumescent fireproof coating (4) and the second non-combustible fireproof coating (5) are coated with a wear-resistant layer (6).

2. A fire retardant coating composite structure according to claim 1, characterized in that: The waterproof structure (1) comprises a top wall waterproof layer (101) and a bottom waterproof layer (102), wherein the top wall waterproof layer (101) and the bottom waterproof layer (102) are both coated on the surface of the tunnel wall, the molten coating (2) is coated on the surface of the top wall waterproof layer (101), and the bottom waterproof layer (102) is coated on both ends of the bottom of the top wall waterproof layer (101), the molten coating (2), the first non-flammable fireproof coating (3), the intumescent fireproof coating (4), the second non-flammable fireproof coating (5) and the wear-resistant layer (6).

3. A fire retardant coating composite structure according to claim 1, characterized in that: The molten coating (2) comprises low melting point glass powder and a base solvent.

4. A fire retardant coating composite structure according to claim 1, characterized in that: The axial length of the first non-combustible fire-proof coating (3) is in the range of 1 to 5 m, and the axial length of the intumescent fire-proof coating (4) is in the range of 2 to 6 m.

5. The fire retardant coating composite structure according to claim 1, characterized in that: The sum of the thicknesses of the first non-combustible fireproof coating (3) and the intumescent fireproof coating (4) is the same as the thickness of the second non-combustible fireproof coating (5).

6. A fire retardant coating composite structure according to claim 5, characterized in that: The coating thickness of the first non-combustible fire-proof coating (3) is 6 to 10 mm, the coating thickness of the second non-combustible fire-proof coating (5) is 13 to 22 mm, and the intumescent fire-proof coating (4) is a nitrogen-containing intumescent fire-proof coating.

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