Fabricated steel beam fireproof structure

Abstract

The utility model discloses an assembled steel beam fireproof structure, including modularized fireproof structure system and modularized assembled decoration structure system, its characterized in that: modularized fireproof structure system includes modularized fireproof rock wool board no.

Description

Technical Field

[0001] This utility model relates to the field of steel structure buildings and prefabricated decoration, specifically a fireproof structure for prefabricated steel beams. Background Technology

[0002] Steel structures have become the mainstream structural form in modern architecture due to their advantages such as light weight, rapid construction, and flexible space utilization. However, steel has significant shortcomings in fire resistance. When the ambient temperature reaches around 600℃, the strength of steel drops sharply to less than one-third of its strength at room temperature, and its fire resistance limit is usually only 15-30 minutes. Fire protection measures are needed to meet the fire resistance rating requirements of buildings (such as the 1-4 levels specified in the "Code for Fire Protection Design of Buildings" GB50016). Traditional fire protection methods have many technical limitations. Currently, mainstream fire-retardant coating spraying processes (such as thick cement-based coatings and thin intumescent coatings) suffer from long construction cycles, numerous on-site wet operations, and difficulties in integrating with decoration, especially in prefabricated buildings where they cannot meet the demands of rapid construction. Furthermore, traditionally sprayed fire-retardant coatings have a loose surface that cannot be directly used as a decorative base layer, requiring additional treatment. This not only increases material consumption and labor costs but also extends the construction period due to the overlapping of processes. More importantly, the disconnect between the design of fire-retardant coatings and decoration systems can easily lead to contradictions such as "insufficient fire-retardant layer thickness affecting safety" or "excessive thickness of the fire-retardant layer encroaching on decoration space," making it difficult to meet the modern building's demand for "safety and functionality in tandem."

[0003] Prefabricated decoration, with "factory prefabrication + on-site assembly" as its core, achieves high efficiency, controllable quality, and environmental friendliness in the decoration process through SI separation technology (separation of structure and interior decoration), modular product design, and dry construction. Its core advantages lie in the millimeter-level precision of the prefabricated modular components; dry construction methods (such as bolted connections and tongue-and-groove joints) avoid the dust and noise pollution of traditional wet construction, shortening the construction period, ensuring quality control, and promoting green energy conservation.

[0004] However, the current integration of steel structure fire protection systems and prefabricated decoration systems is still in a state of "independence": the design of fire protection systems only focuses on fire resistance performance and does not consider the installation requirements of the decoration base layer; the decoration system needs to be passively adapted based on the existing fireproof layer, resulting in many conflicts between the two in terms of space size, load transfer, and performance coordination.

[0005] While some existing technologies attempt to cover steel beams with fire-resistant boards (such as rock wool composite boards and calcium silicate boards) or optimize the keel structure of prefabricated decoration separately, none have achieved deep synergy between the fire protection system and the decoration system. Fire-resistant board covering only solves the fire protection problem, but still requires additional decoration keel installation, increasing material layers and construction complexity. Separate optimization of prefabricated decoration does not incorporate fire protection performance into the overall design, making it difficult to ensure the functional unity of fire protection and decoration. In addition, the traditional separation of fire protection and decoration leads to the need for separate fire protection calculations and decoration layout during the design phase, and the need to coordinate cross-operations of different teams during the construction phase, resulting in high management costs and a tendency for blame-shifting.

[0006] Therefore, based on its many years of experience in design, development and actual production in the relevant industry, the applicant has studied and improved the existing structure and its shortcomings, and provided a prefabricated steel beam fireproof structure in order to achieve a more practical purpose. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this utility model provides a prefabricated steel beam fireproof structure, solving the problems of traditional steel structure fireproof construction relying on on-site wet operations, resulting in long construction cycles and significant environmental impact; the separate design of the steel structure fireproof system and prefabricated decoration system, requiring additional treatment of the fireproof layer surface before it can be used as a decoration base, leading to overlapping processes and increased costs; traditional fireproof layer splicing using simple overlaps or adhesives, resulting in insufficient sealing and easy loosening at high temperatures; the lack of coordinated design between fireproof and decoration materials, making it difficult to balance fire resistance and decorative effect; the lack of standardized prefabricated and transitional support structures for the fireproof and decoration systems, leading to unstable connections and dimensional conflicts; and the high management costs associated with the separate design and construction of fireproof and decoration systems in existing technologies.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated steel beam fireproof structure, comprising a modular fireproof structure system and a modular prefabricated decoration structure system. The modular fireproof structure system includes a modular fireproof rock wool board I, a modular fireproof rock wool board II, a steel keel support frame, bolts, and an I-beam. The modular prefabricated decoration structure system includes a suspended keel component I, a suspended keel component II with tongue and groove joints made of calcium silicate decorative panel, and self-tapping screws.

[0011] The modular fireproof rock wool board one, the modular fireproof rock wool board two, and the I-beam are all prefabricated and perforated in the factory.

[0012] The modular fireproof rock wool board is flat with a tongue and groove structure at the bottom. It is assembled and fixed with the steel keel support frame in the factory. It is fixed to one side of the I-beam by bolts through prefabricated holes. The tongue and groove at the bottom is tightly inserted into the tongue and groove at the bottom of the modular fireproof rock wool board. As the core component of the modular fireproof construction system, it uses the fireproof properties of rock wool to provide fire protection on one side of the I-beam. The tongue and groove design ensures a tight connection with the rock wool board on the other side.

[0013] The modular fireproof rock wool board is flat and has a tongue and groove structure at the bottom. It is fixed to the other side of the I-beam by bolts passing through prefabricated holes. The tongue and groove at the bottom end are tightly inserted into the tongue and groove at the bottom end of the modular fireproof rock wool board. It is used to provide fire protection on the other side of the I-beam and also serves as the installation foundation for the steel keel support frame, realizing the connection between the fireproof structure and the decoration system.

[0014] Furthermore, the fireproof rock wool board has a density of 120 kg / m³ and a fire resistance limit of ≥120 minutes, meeting the A1 fire resistance requirements of GB / T25975-2018 "Rock Wool Insulation Products for Buildings".

[0015] The steel keel support frame is a frame structure that has been composited and fixed with modular fireproof rock wool board 1 in the factory; on site, it is used to hang the suspended keel component 1 and reinforced with self-tapping screws; as a transitional support structure between the modular fireproof construction system and the prefabricated decoration construction system, it supports the upper suspended keel component 2, realizing the organic connection between the fireproof system and the decoration system.

[0016] The bolts pass through the prefabricated holes in the I-beam, modular fireproof rock wool board one, and modular fireproof rock wool board two, fastening the fireproof rock wool boards on both sides of the steel beam; this is used to achieve dry-type connection, ensure the tight fixation of the modular fireproof structure system to the I-beam, and improve installation efficiency and structural stability.

[0017] The I-beam is an I-shaped steel beam with pre-drilled holes for bolts. It serves as the main structure. Modular fireproof rock wool board 1 and modular fireproof rock wool board 2 are connected to both sides by bolts. It serves as the load-bearing beam of the building structure and provides the installation foundation for the modular fireproof construction system, bearing the load of the fireproof and decoration system.

[0018] Furthermore, M10 high-strength bolts are used, with the specific length determined based on the rock wool board thickness, I-beam flange thickness, and nut thickness. Grade 8.8 high-strength carbon structural steel is used, with a tensile strength ≥800MPa and a yield strength ≥640MPa, meeting the strength requirements for steel structure connections. A combination of bolt, flat washer, spring washer, and nut is employed. Moreover, the diameter of the pre-drilled holes should be larger than the bolt diameter to allow for positional adjustment during installation, preventing installation failures due to dimensional errors in the steel beam or rock wool board.

[0019] Furthermore, to compensate for differences in thermal expansion, the elastic gasket is made of high-temperature resistant rubber with a thickness of 3mm.

[0020] Preferably, the suspended keel component is attached to the steel keel support frame and reinforced with self-tapping screws for installing the tongue and groove calcium silicate decorative panel; as the base support component of the decoration structure system, it connects the steel keel support frame and the decorative panel, providing an installation carrier for the decorative panel.

[0021] The second suspended keel component works in conjunction with the first suspended keel component to support the tongue and groove calcium silicate decorative panel, increasing the stability of the decoration base layer and ensuring that the decorative panel is installed firmly.

[0022] Furthermore, the snap-fit ​​depth of the suspended keel components is ≥10mm, and 3 self-tapping screws are installed per meter of keel with a spacing of 300mm between them.

[0023] The tongue-and-groove calcium silicate decorative panel is flat with tongue and groove edges. It is installed on modular fireproof rock wool board and suspended keel components. The tongue and groove structure enables tight splicing of adjacent panels. It is used to decorate the surface and enhance the decorative effect. Calcium silicate material has certain fire resistance properties and works in conjunction with the fireproof construction system to ensure the overall fire resistance performance.

[0024] Furthermore, the tongue-and-groove calcium silicate decorative panel has a flexural strength ≥12MPa, a water absorption rate ≤25%, and a fire resistance time ≥2 hours, meeting the requirements of GB / T7019-2014 "Test Methods for Fiber Cement Products". The tongue and groove edges are beveled (radius 2mm) to prevent cracking during installation.

[0025] Self-tapping screws pass through the suspended keel component and the steel keel support frame to achieve a reinforced connection between the two; this enhances the connection stability between the suspended keel component and the steel keel support frame, ensuring the structural integrity of the decoration system.

[0026] Preferably, the tongue and groove joint at the lower end of the modular fireproof rock wool board is a tenon and groove matching structure. The first modular fireproof rock wool board is a tenon, and the second modular fireproof rock wool board is a groove. The tongue and groove gap is filled with an expansion fireproof strip to ensure fireproof sealing.

[0027] Furthermore, the tenon is 15mm deep and 20mm wide, and the groove is matched to the corresponding size. The groove width is 1-2mm (21-22mm) larger than the tenon width to allow for installation adjustment space. The tongue and groove gap is filled with fireproof sealant with an expansion ratio of ≥250%, a temperature resistance of ≥1000℃, and a sealant layer thickness of 3-5mm to ensure the gap is sealed at high temperatures and prevent the spread of flames.

[0028] Preferably, the steel keel support frame is made of Q235B channel steel.

[0029] Furthermore, the on-site installation sequence is as follows: after the I-beam 9 is positioned on-site, modular fireproof rock wool board 1 and modular fireproof rock wool board 2 are installed in sequence. Then, the modular fireproof rock wool board 1 and modular fireproof rock wool board 2 on both sides of the I-beam 9 are fixed by bolts 8 through the holes. After the modular fireproof structure system is installed, the suspended keel component 4 is hung on the steel keel support frame 3 and reinforced with self-tapping screws 7. Finally, the tongue and groove calcium silicate decorative panel 6 is spliced ​​and installed.

[0030] (III) Beneficial Effects

[0031] This utility model provides a prefabricated steel beam fireproof structure, which has the following advantages compared with the prior art: by deeply integrating the modular fireproof structure system with the modular prefabricated decoration system, it brings significant technical advantages and practical value.

[0032] 1. Through the modular integrated design of factory prefabrication, the prefabricated openings of I-beams and fireproof rock wool boards and the factory composite fixing of steel keel support frame and rock wool boards are realized. Combined with on-site bolt dry connection and tongue and groove insertion, the whole process is wet-free, which greatly improves the installation accuracy and construction efficiency, and shortens the construction period compared with the traditional fireproof and decoration separation construction mode.

[0033] 2. The structure adopts a dual structure of "tongue-and-groove sealing + bolt fastening". The tongue and groove of the lower end of the fireproof rock wool board is fitted with fireproof sealant with an expansion ratio of ≥250%. The bolt connection is equipped with a 3mm thick high-temperature resistant elastic gasket to compensate for the difference in thermal expansion. This not only ensures fireproof sealing performance, but also enhances structural stability and solves the problems of poor splicing and easy loosening of traditional fireproof layers at high temperatures.

[0034] 3. Through synergistic optimization of material performance, A1-grade fireproof rock wool (density 120kg / m³, fire resistance limit ≥120 minutes) and high flexural strength calcium silicate decorative panel (flexural strength ≥12MPa, fire resistance time ≥2 hours) are selected, achieving a seamless connection between fire protection and decorative effect, avoiding the drawback of traditional fireproof layers requiring additional treatment before they can be used as the base layer for decoration;

[0035] 4. The steel keel support frame serves as a transitional structure, bearing the load of the fire protection system and providing a standardized mounting base for the decorative keel. This achieves an integrated design of "fire protection-support-decoration," eliminating dimensional conflicts and load transfer contradictions between the two, and meeting the multiple requirements of modern prefabricated buildings for safety, efficiency, environmental protection, and aesthetics. Attached Figure Description

[0036] Figure 1 This is a front view of a fireproof prefabricated steel beam structure.

[0037] Figure 23D diagram of modular fireproof rock wool board module 1;

[0038] Figure 3 Side view of modular fireproof rock wool board module 1;

[0039] Figure 4 3D diagram of modular fireproof rock wool board module 2;

[0040] Figure 5 A 3D schematic diagram of the modular fireproof rock wool board assembly;

[0041] Figure 6 A 3D view of the suspended keel component;

[0042] Figure 7 Two-dimensional and three-dimensional diagrams of the suspended keel components;

[0043] Figure 8 It is a calcium silicate decorative panel with tongue and groove joints;

[0044] Figure 9 Schematic diagram of the opening in the steel beam;

[0045] Figure 10 Cross-sectional view of a structural system combining modular steel beam fireproofing and prefabricated decoration.

[0046] In the diagram: 1. Modular fireproof rock wool board one; 2. Modular fireproof rock wool board two; 3. Steel keel support frame; 4. Suspended keel component one; 5. Suspended keel component two; 6. Tongue-and-groove calcium silicate decorative panel; 7. Self-tapping screws; 8. Bolts; 9. I-beam. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] like Figures 1-10 As shown, this utility model provides a technical solution: a prefabricated steel beam fireproof structure, including a modular fireproof structure system and a modular prefabricated decoration structure system. The modular fireproof structure system includes a modular fireproof rock wool board 1, a modular fireproof rock wool board 2, a steel keel support frame 3, bolts 8, and an I-beam 9. The modular prefabricated decoration structure system includes a suspended keel component 1 4, a suspended keel component 2 5, a calcium silicate decorative panel with tongue and groove 6, and self-tapping screws 7.

[0049] Modular fireproof rock wool board 1, modular fireproof rock wool board 2, and I-beam 9 are all prefabricated and perforated in the factory.

[0050] Modular fireproof rock wool board 1 and steel keel support frame 3 are composited and fixed in the factory. The steel keel support frame 3 is made of Q235B channel steel.

[0051] Modular fireproof rock wool board 1 is flat with a tongue and groove structure at the bottom. It is composited and fixed with the steel keel support frame 3 in the factory. It is fixed to one side of the I-beam 9 by bolts 8 passing through prefabricated holes. The tongue and groove at the bottom is tightly inserted into the tongue and groove at the bottom of modular fireproof rock wool board 2. As the core component of the modular fireproof construction system, it uses the fireproof properties of rock wool to provide fire protection on one side of the I-beam 9. The tongue and groove design ensures a tight connection with the rock wool board on the other side.

[0052] Modular fireproof rock wool board 2 is flat and has a tongue and groove structure at the bottom. It is fixed to the other side of the I-beam 9 by bolts 8 passing through prefabricated holes. The tongue and groove at the bottom end is tightly inserted with the tongue and groove at the bottom end of modular fireproof rock wool board 1. It is used to provide fire protection on the other side of the I-beam 9 and also serves as the installation foundation for the steel keel support frame 3, realizing the connection between the fireproof structure and the decoration system.

[0053] Furthermore, the fireproof rock wool board has a density of 120 kg / m³ and a fire resistance limit of ≥120 minutes, meeting the A1 fire resistance requirements of GB / T25975-2018 "Rock Wool Insulation Products for Buildings".

[0054] The steel keel support frame 3 is a frame structure. It has been composited and fixed with the modular fireproof rock wool board 1 in the factory. On site, it is used to hang the suspended keel component 4 and is reinforced with self-tapping screws 7. As a transitional support structure between the modular fireproof construction system and the prefabricated decoration construction system, it supports the upper suspended keel component 2 5 and realizes the organic connection between the fireproof system and the decoration system.

[0055] Bolt 8 passes through the prefabricated holes in the I-beam 9, modular fireproof rock wool board 1, and modular fireproof rock wool board 2 to fasten the fireproof rock wool boards on both sides of the steel beam; it is used to achieve dry operation connection, ensure the tight fixation of the modular fireproof construction system to the I-beam 9, and improve installation efficiency and structural stability.

[0056] The I-beam 9 is an I-beam with pre-drilled holes for bolts 8 to pass through. It serves as the main structure. Modular fireproof rock wool board 1 and modular fireproof rock wool board 2 are connected to both sides by bolts 8. It serves as the load-bearing beam of the building structure and provides the installation foundation for the modular fireproof construction system, bearing the load of the fireproof and decoration system.

[0057] Furthermore, bolt 8 is an M10 high-strength bolt, the specific length of which is determined based on the thickness of the rock wool board + the flange thickness of the I-beam 9 + the nut thickness. It is made of 8.8 grade high-strength carbon structural steel with a tensile strength ≥800MPa and a yield strength ≥640MPa, which can meet the strength requirements of the steel structure connection. It adopts a combination of "bolt 8 + flat washer + spring washer + nut". Furthermore, the diameter of the pre-drilled hole should be larger than the diameter of bolt 8 to reserve space for position adjustment during installation, so as to avoid installation failure due to dimensional errors of the steel beam or rock wool board.

[0058] Furthermore, elastic gaskets are used to compensate for differences in thermal expansion and prevent the connection from loosening at high temperatures. They are made of high-temperature resistant rubber with a thickness of 3mm.

[0059] The suspended keel component 4 is attached to the steel keel support frame 3 and reinforced by self-tapping screws 7. It is used to install the tongue and groove calcium silicate decorative panel 6. As the base support component of the decoration structure system, it connects the steel keel support frame 3 and the decorative panel, and provides an installation carrier for the decorative panel.

[0060] The suspended keel component 2 5 and the suspended keel component 1 4 work together to support the tongue and groove calcium silicate decorative panel 6, increasing the stability of the decoration base layer and ensuring that the decorative panel is installed firmly.

[0061] Furthermore, the snap-fit ​​depth of the suspended keel components is ≥10mm, and 3 self-tapping screws are installed per meter of keel with a spacing of 300mm between them.

[0062] The tongue-and-groove calcium silicate decorative panel 6 is flat with tongue and groove edges. It is installed on the modular fireproof rock wool board 1 and the suspended keel component. The tongue and groove structure enables the tight splicing of adjacent panels. It is used to decorate the surface and enhance the decorative effect. The calcium silicate material has certain fire resistance and works in conjunction with the fireproof construction system to ensure the overall fire resistance performance.

[0063] Furthermore, the tongue-and-groove calcium silicate decorative panel 6 has a flexural strength ≥12MPa, a water absorption rate ≤25%, and a fire resistance time ≥2 hours, meeting the requirements of GB / T7019-2014 "Test Methods for Fiber Cement Products". The tongue and groove edges are chamfered (radius 2mm) to prevent cracking during installation.

[0064] Self-tapping screws 7 pass through the suspended keel component 4 and the steel keel support frame 3 to achieve a reinforced connection between the two; this enhances the connection stability between the suspended keel component and the steel keel support frame 3, ensuring the structural integrity of the decoration system.

[0065] The lower end of the modular fireproof rock wool board has a tongue and groove joint structure. Modular fireproof rock wool board 1 has a tongue and groove joint, and modular fireproof rock wool board 2 has a groove joint. The tongue and groove joint is filled with an expansion fireproof strip to ensure fireproof sealing.

[0066] Furthermore, the tenon is 15mm deep and 20mm wide, and the groove is matched to the corresponding size. The groove width is 1-2mm larger than the tenon width (21-22mm) to reserve installation adjustment space; the tongue and groove gap is filled with fireproof sealant with an expansion ratio ≥250%, temperature resistance ≥1000℃, and a sealant layer thickness of 3-5mm to ensure the gap is sealed at high temperatures and prevent the spread of flames.

[0067] Furthermore, the lower ends of modular fireproof rock wool board 1 and modular fireproof rock wool board 2 can also have a semi-convex and semi-concave symmetrical structure to ensure interchangeability.

[0068] In Example 1, during operation, the modular fireproof rock wool board 1, the modular fireproof rock wool board 2, and the I-beam 9 are all prefabricated with holes in the factory. The steel keel support frame 3 uses Q235B channel steel and is combined and fixed with the modular fireproof rock wool board 2 in the factory.

[0069] After the I-beam 9 is positioned on site, modular fireproof rock wool board 1 and modular fireproof rock wool board 2 are installed in sequence. Modular fireproof rock wool board 1 and modular fireproof rock wool board 2 use fireproof rock wool with a density of 120kg / m³ and a fire resistance limit of ≥120 minutes, which meets the fire protection requirements of GB / T25975-2018. The lower end of the modular fireproof rock wool board is provided with a tongue and groove joint, and the tongue and groove joint is filled with an expansion fireproof strip to ensure fireproof sealing.

[0070] Then, the modular fireproof rock wool board 1 and modular fireproof rock wool board 2 on both sides of the I-beam 9 are fixed by passing the bolts 8 through the holes. The bolts 8 are M10 high-strength bolts. The diameter of the pre-made holes is larger than the diameter of the bolts 8 to reserve adjustment space. Elastic washers are set at the bolt 8 connection to compensate for the difference in thermal expansion. The elastic washers are made of high-temperature resistant rubber material with a thickness of 3mm.

[0071] After the modular fireproof structure system is installed, hang the suspended keel component 4 on the steel keel support frame 3 with a snap-fit ​​depth of ≥10mm and reinforce it with self-tapping screws 7. Set 3 self-tapping screws 7 per meter of keel with a spacing of 300mm between them.

[0072] Finally, the tongue-and-groove calcium silicate decorative panel 6 is spliced ​​and installed. The tongue-and-groove calcium silicate decorative panel 6 has a flexural strength ≥12MPa, a water absorption rate ≤25%, and a fire resistance time ≥2 hours, which meets the GB / T7019-2014 standard.

[0073] After installation, two more tests can be added: static load test and fireproof sealing test. Apply 1.2 times the design load (≥50kg / m²) to the surface of the decorative panel and keep it without deformation or loosening for 1 hour; use a smoke tester to test the tongue and groove and bolt connections, and the smoke leakage rate should be ≤0.1m³ / h.

[0074] In conclusion, the deep integration of modular fire-resistant structural systems and modular prefabricated decoration systems brings significant technical advantages and practical value.

[0075] Through modular integrated design with factory prefabrication, prefabricated openings of I-beams and fireproof rock wool boards and factory composite fixing of steel keel support frame and rock wool boards were achieved. Combined with on-site dry bolt connection and tongue and groove insertion, the entire process was wet-free, which greatly improved installation accuracy and construction efficiency and shortened the construction period compared with the traditional fireproof and decoration separation construction mode.

[0076] The fireproof rock wool board adopts a dual structure of "tongue-and-groove sealing + bolt fastening". The tongue and groove of the lower end of the fireproof rock wool board is fitted with fireproof sealant with an expansion ratio of ≥250%. The bolt connection is equipped with a 3mm thick high-temperature resistant elastic gasket to compensate for the difference in thermal expansion. This not only ensures fireproof sealing but also enhances structural stability, solving the problems of poor splicing and easy loosening of traditional fireproof layers at high temperatures.

[0077] By optimizing the synergistic properties of materials, A1-grade fireproof rock wool (density 120kg / m³, fire resistance limit ≥120 minutes) and high flexural strength calcium silicate decorative panel (flexural strength ≥12MPa, fire resistance time ≥2 hours) were selected, achieving a seamless connection between fire protection and decorative effect, avoiding the drawback of traditional fireproof layers requiring additional treatment before they can be used as the base layer for decoration.

[0078] The steel keel support frame serves as a transitional structure, bearing the load of the fire protection system and providing a standardized mounting base for the decorative keel. This achieves an integrated design of "fire protection-support-decoration," eliminating dimensional conflicts and load transfer contradictions between the two, and meeting the multiple requirements of modern prefabricated buildings for safety, efficiency, environmental protection, and aesthetics.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated steel beam fireproof structure, comprising a modular fireproof structure system and a modular prefabricated decoration structure system, characterized in that: The modular fireproof structural system includes modular fireproof rock wool board one (1), modular fireproof rock wool board two (2), steel keel support frame (3), bolts (8) and I-beam (9); the modular prefabricated decoration structural system includes suspended keel component one (4), suspended keel component two (5), calcium silicate decorative panel with tongue and groove (6), and self-tapping screws (7). The modular fireproof rock wool board one (1), the modular fireproof rock wool board two (2) and the I-beam (9) are all prefabricated and perforated in the factory; The modular fireproof rock wool board one (1) is flat and has a tongue and groove structure at the bottom. It is combined and fixed with the steel keel support frame (3) in the factory. It is fixed to one side of the I-beam (9) by bolts (8) passing through prefabricated holes. The tongue and groove at the bottom is tightly inserted with the tongue and groove at the bottom of the modular fireproof rock wool board two (2). As the core component of the modular fireproof structure system, the fireproof performance of rock wool is used to provide fire protection on one side of the I-beam (9). The tongue and groove design ensures a tight connection with the rock wool board on the other side. The modular fireproof rock wool board 2 (2) is flat and has a tongue and groove structure at the bottom. It is fixed to the other side of the I-beam (9) by bolts (8) passing through prefabricated holes. The tongue and groove at the bottom end is tightly inserted into the tongue and groove at the bottom end of the modular fireproof rock wool board 1 (1). It is used to provide fire protection on the other side of the I-beam (9) and at the same time serve as the installation foundation of the steel keel support frame (3), realizing the connection between the fireproof structure and the decoration system. The steel keel support frame (3) is a frame structure. It has been composited and fixed with modular fireproof rock wool board (1) in the factory. On site, it is used to hang the suspended keel component (4) and reinforced with self-tapping screws (7). As a transitional support structure between the modular fireproof construction system and the prefabricated decoration construction system, it supports the upper suspended keel component (5) to realize the organic connection between the fireproof system and the decoration system. The bolts (8) pass through the prefabricated holes of the I-beam (9), modular fireproof rock wool board one (1) and modular fireproof rock wool board two (2) to fasten the fireproof rock wool boards on both sides of the steel beam; to realize dry operation connection, ensure the tight fixation of the modular fireproof structure system with the I-beam (9), and improve installation efficiency and structural stability; The I-beam (9) is an I-beam with pre-drilled holes for bolts (8) to pass through. As the main structure, the two sides are connected by bolts (8) to modular fireproof rock wool board 1 (1) and modular fireproof rock wool board 2 (2), which serve as load-bearing beams for the building structure and provide installation foundations for the modular fireproof construction system, bearing the loads of the fireproof and decoration systems.

2. The fireproof structure of a prefabricated steel beam according to claim 1, characterized in that: The suspended keel component 1 (4) is attached to the steel keel support frame (3) and reinforced by self-tapping screws (7) for installing the tongue and groove calcium silicate decorative panel (6); as the base support component of the decoration structure system, it connects the steel keel support frame (3) and the decorative panel, and provides an installation carrier for the decorative panel; The second suspended keel component (5) and the first suspended keel component (4) work together to support the tongue and groove calcium silicate decorative panel (6), increasing the stability of the decoration base layer and ensuring that the decorative panel is installed firmly. The tongue-and-groove calcium silicate decorative panel (6) is flat and has tongue and groove on the edge. It is installed on the modular fireproof rock wool board (1) and the suspended keel component. The tongue and groove structure enables the close splicing of adjacent panels. It is used to decorate the surface and improve the decorative effect. The calcium silicate material has certain fireproof performance and works with the fireproof construction system to ensure the overall fireproof performance. The self-tapping screw (7) passes through the suspended keel component (4) and the steel keel support frame (3) to achieve a reinforced connection between the two; it is used to enhance the connection stability between the suspended keel component and the steel keel support frame (3) and ensure that the decoration system structure is firm.

3. The fireproof structure of a prefabricated steel beam according to claim 2, characterized in that: The lower end tongue and groove of the modular fireproof rock wool board is a tenon and groove matching structure. The modular fireproof rock wool board one (1) is a tenon and the modular fireproof rock wool board two (2) is a groove. The tongue and groove gap is filled with an expansion fireproof strip to ensure fireproof sealing.

4. The fireproof structure of a prefabricated steel beam according to claim 3, characterized in that: The steel keel support frame (3) is made of Q235B channel steel.

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