Fireproof steel structure

Abstract

The utility model relates to the technical field of steel structures, in particular to a fireproof steel structure. The fireproof steel comprises a steel body, the surface of the steel body is covered with a flame-retardant base material, the flame-retardant base material is coated with a first fireproof coating, and the outer layer of the first fireproof coating is coated with a second fireproof coating; the steel body is provided with a rapid cooling flame-retardant structure; according to the structure, the flame-retardant base material and the multiple fireproof coatings are arranged, high-humidity and acid-base substances possibly existing in the environment in daily life can be protected, corrosion to the coatings and an internal steel frame is prevented, fire prevention and heat insulation can be conducted when a fire disaster happens, the temperature rising speed of a steel body is reduced, and building collapse is prevented; according to the structure, a rapid cooling flame-retardant structure is used, high-pressure gas is stored, when the temperature of a steel body rises to a certain temperature, gas is rapidly released, the temperature of the steel body is reduced through pressure release and heat absorption of the gas, meanwhile, the local oxygen content can be rapidly reduced through non-combustible gas, and therefore combustion of flames near the steel body is reduced, and the service life of the steel body is prolonged. And the safety of the steel structure is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structures, in particular to a fireproof steel structure. Background Art

[0002] Steel structure is a structure made of steel materials. It is a structural material widely used in modern large-scale buildings. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates. The components or parts are usually connected by welds, bolts or rivets.

[0003] However, most steel structures are directly welded and built during use, but they have poor fire resistance. In the event of a fire, especially in factories with special materials where there are many flammable substances, the high temperature generated by rapid combustion will be quickly absorbed by the steel structure, causing the temperature of the steel structure to rise rapidly. First, due to thermal expansion and contraction, the length of the steel structure will change, resulting in surface deformation. As the temperature rises, the lattice structure inside the steel structure will gradually change. At the same time, when the temperature is high, the steel structure will undergo plastic deformation, thereby gradually losing its supporting capacity and causing the building to collapse. Some buildings will use fire-retardant coatings, which can reduce heat conduction during a fire to a certain extent and slow down the heating rate of the steel structure. However, in long-term use, the thermal expansion rate of the steel structure and the rate of the coating are not the same, which will cause the coating to gradually crack and fall off. At the same time, the high humidity in some environments will also gradually damage the coating. Utility Model Content

[0004] The purpose of the utility model is to provide a fireproof steel structure with a reasonable design to solve the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it comprises a steel body, the surface of the steel body is covered with a flame-retardant substrate, a fire-retardant coating 1 is coated on the flame-retardant substrate, and the outer layer of the fire-retardant coating 1 is coated with a fire-retardant coating 2; the steel body is provided with a rapid cooling flame-retardant structure.

[0006] Preferably, the rapid cooling flame retardant structure includes a compressed gas chamber opened in the steel body, the compressed gas chamber is filled with high-pressure gas, a cylindrical fixed block is connected to the side of the compressed gas chamber close to the outer wall of the steel body, a sliding groove is opened in the fixed block and the steel body, a support frame is provided on the end of the sliding groove away from the compressed gas chamber, a temperature-sensitive glass ball is provided on the support frame facing the sliding groove, a sliding sealing head is provided at the front end of the temperature-sensitive glass ball, the sliding sealing head is slidably installed in the sliding groove, the diameter of the sliding sealing head matches the inner diameter of the sliding groove, and a sealing ring is provided on the sliding sealing head; a plurality of exhaust holes are opened in the fixed block and the steel body, one end of the exhaust hole is connected to the rear side of the sliding sealing head in the sliding groove, and the other end of the exhaust hole is connected to the surface of the steel body.

[0007] Preferably, the flame-retardant substrate and the first and second fire-retardant coatings directly above the sliding groove and the plurality of exhaust holes are cut to form a movable cover, and the movable cover is mounted on the steel body by low-viscosity glue.

[0008] Preferably, the gas filled in the compressed gas chamber is non-flammable argon, nitrogen or carbon dioxide, and the gas pressure is 1.6-2.0 MPa.

[0009] Preferably, the flame retardant substrate is glass fiber aluminum foil cloth, and the flame retardant substrate except for the movable cover is covered on the steel body by fireproof glue.

[0010] Preferably, the first fire retardant coating is a polyurea coating, and the thickness of the polyurea coating is 0.1 mm to 0.4 mm.

[0011] Preferably, the material of the second fire retardant coating is ammonium polyphosphate coating, and the thickness of the ammonium polyphosphate coating is 0.1 mm to 0.5 mm.

[0012] After adopting the above structure, the beneficial effects of the utility model are:

[0013] 1. This structure is equipped with a flame-retardant substrate and a multi-layer fire-retardant coating, which can protect against high humidity and acidic and alkaline substances that may exist in the environment in daily life, prevent erosion of the coating and the internal steel frame, and can perform fireproofing and heat insulation when a fire occurs, reduce the temperature rise rate of the steel body, and prevent the building from collapsing.

[0014] 2. This structure uses a rapid cooling flame retardant structure. By storing high-pressure gas, when the steel body is heated to a certain temperature, the gas can be quickly released, and the temperature of the steel body can be quickly reduced by absorbing heat through gas pressure release. At the same time, the non-combustible gas can quickly reduce the local oxygen content, thereby reducing the burning of the flame near the steel body and further enhancing the safety of the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure below the movable cover in the utility model;

[0018] Figure 4 It is a cross-sectional view of the utility model at the rapid cooling and flame retardant structure.

[0019] Description of reference numerals:

[0020] 1. Steel body; 2. Flame retardant substrate; 3. Fire retardant coating 1; 4. Fire retardant coating 2; 5. Movable cover; 6. Fixed block; 7. Sliding groove; 8. Compressed gas chamber; 9. Sliding sealing head; 10. Temperature sensing glass ball; 11. Support frame; 12. Exhaust hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 2 As shown, it comprises a steel body 1, the surface of the steel body 1 is covered with a flame retardant substrate 2, the flame retardant substrate 2 is coated with a fire retardant coating 3, the outer layer of the fire retardant coating 3 is coated with a fire retardant coating 2 4; the steel body 1 is provided with a rapid cooling flame retardant structure.

[0023] See also Figure 1-Figure 4 As shown, the rapid cooling flame retardant structure includes a compressed gas chamber 8 opened in the steel body 1, the compressed gas chamber 8 is filled with high-pressure gas, a cylindrical fixed block 6 is connected to the side of the compressed gas chamber 8 close to the outer wall of the steel body 1, a sliding groove 7 is opened in the fixed block 6 and the steel body 1, a support frame 11 is provided on the end of the sliding groove 7 away from the compressed gas chamber 8, a temperature-sensitive glass ball 10 is provided on the support frame 11 facing the sliding groove 7, a sliding sealing head 9 is provided at the front end of the temperature-sensitive glass ball 10, the sliding sealing head 9 is slidably installed in the sliding groove 7, the diameter of the sliding sealing head 9 matches the inner diameter of the sliding groove 7, and a sealing ring is provided on the sliding sealing head 9; a plurality of exhaust holes 12 are opened in the fixed block 6 and the steel body 1, one end of the exhaust hole 12 is connected to the rear side of the sliding sealing head 9 in the sliding groove 7, and the other end of the exhaust hole 12 is connected to the surface of the steel body 1; the gas filled in the compressed gas chamber 8 is non-flammable argon or nitrogen or carbon dioxide, and the gas pressure is 1.6-2.0Mpa;

[0024] The flame retardant substrate 2 and the fire retardant coating 1 3 and the fire retardant coating 2 4 located directly above the sliding groove 7 and the plurality of exhaust holes 12 are cut to form a movable cover 5, and the movable cover 5 is mounted on the steel body 1 by means of low-viscosity glue.

[0025] As an optimization scheme of the utility model, a compressed gas chamber 8 is provided to store high-pressure non-combustible gas, and at the same time, the gas pressure will push the sliding sealing head 9 outward, and the temperature-sensitive glass ball 10 uses the support frame 11 as a support to push the sliding sealing head 9 from the outside, so that the sliding sealing head 9 can seal the compressed gas chamber 8; when a fire occurs, after the thermal insulation structure of the outer layer of the steel body 1 fails, when the temperature of the steel body 1 rises to a specified temperature, the temperature-sensitive glass ball 10 automatically breaks, and the sliding sealing head 9 loses support and slides outward under the action of air pressure and pushes onto the support frame 11, so that the high-pressure gas is quickly discharged from the exhaust hole 12, and then pushes the movable cover 5 outward, and the movable cover 5 fixed with low-viscosity glue can be quickly pushed down, so that the high-pressure gas can be quickly ejected, and in the process of gas ejection, the gas releases pressure and absorbs a large amount of heat, quickly reducing the temperature of the steel body 1 and the vicinity, and at the same time, the non-combustible gas can quickly reduce the oxygen content of the surrounding air, thereby reducing the combustion rate and achieving flame retardancy.

[0026] See also Figure 1-Figure 4 As shown, the flame retardant substrate 2 is a glass fiber aluminum foil cloth, and the flame retardant substrate 2 except for the movable cover 5 is covered on the steel body 1 by fireproof glue;

[0027] The fire retardant coating 1 3 is a polyurea coating, and the thickness of the polyurea coating is 0.1mm-0.4mm; the material of the fire retardant coating 2 4 is an ammonium polyphosphate coating, and the thickness of the ammonium polyphosphate coating is 0.1mm-0.5mm.

[0028] As an optimization scheme of the utility model, glass fiber aluminum foil cloth is used, which can be well insulated and flame retardant on the one hand, and on the other hand, it has a certain ductility and can automatically adapt to daily temperature changes to prevent tearing and deformation; the polyurea coating has good chemical resistance, and the ammonium polyphosphate coating can further improve the acid and alkali resistance and reduce the acid and alkali corrosion generated by the environment. At the same time, the glass fiber aluminum foil cloth, polyurea coating and ammonium polyphosphate coating are all waterproof and can reduce the impact of humidity.

[0029] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or within the equivalent forms of such scope and boundaries.

Claims

1. A fireproof steel structure, comprising a steel body (1), characterized in that: The surface of the steel body (1) is covered with a flame retardant substrate (2), a fire retardant coating (3) is coated on the flame retardant substrate (2), and the outer layer of the fire retardant coating (3) is coated with a fire retardant coating (4); the steel body (1) is provided with a rapid cooling flame retardant structure; The rapid cooling and flame retardant structure comprises a compressed gas chamber (8) opened in a steel body (1), the compressed gas chamber (8) is filled with high-pressure gas, a columnar fixed block (6) is connected to one side of the compressed gas chamber (8) close to the outer wall of the steel body (1), a sliding groove (7) is opened in the fixed block (6) and the steel body (1), a support frame (11) is provided on the end of the sliding groove (7) away from the compressed gas chamber (8), and a temperature-sensitive glass ball (10) is provided on the support frame (11) facing the sliding groove (7), and the temperature-sensitive glass ball (10) is provided on the support frame (11). A sliding sealing head (9) is provided at the front end of the warm glass ball (10), and the sliding sealing head (9) is slidably installed in the sliding groove (7). The diameter of the sliding sealing head (9) matches the inner diameter of the sliding groove (7), and a sealing ring is provided on the sliding sealing head (9); a plurality of exhaust holes (12) are opened in the fixed block (6) and the steel body (1), one end of the exhaust hole (12) is connected to the rear side position of the sliding sealing head (9) in the sliding groove (7), and the other end of the exhaust hole (12) is connected to the surface of the steel body (1).

2. A fireproof steel structure according to claim 1, characterized in that: The flame retardant substrate (2) and the first fireproof coating (3) and the second fireproof coating (4) located directly above the sliding groove (7) and the plurality of exhaust holes (12) are cut to form a movable cover (5), and the movable cover (5) is mounted on the steel body (1) by means of a low-viscosity glue.

3. A fireproof steel structure according to claim 2, characterized in that: The gas filled in the compressed gas chamber (8) is non-flammable argon, nitrogen or carbon dioxide, and the gas pressure is 1.6-2.0 MPa.

4. A fireproof steel structure according to claim 3, characterized in that: The flame retardant substrate (2) is a glass fiber aluminum foil cloth, and the flame retardant substrate (2) except for the movable cover (5) is covered on the steel body (1) by fireproof glue.

5. A fireproof steel structure according to claim 4, characterized in that: The fire retardant coating (3) is a polyurea coating, and the thickness of the polyurea coating is 0.1 mm to 0.4 mm.

6. A fireproof steel structure according to claim 5, characterized in that: The material of the second fireproof coating (4) is ammonium polyphosphate coating, and the thickness of the ammonium polyphosphate coating is 0.1mm-0.5mm.

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