Fireproof structure for wood structure building floor

Abstract

The utility model relates to wood structure building fire prevention technical field provides a kind of fireproof structure for wood structure building floor, the structure includes wood structure floor main part, its upper surface is provided with staggered fireproof groove net structure, including main fireproof groove, first oblique fireproof groove, second oblique fireproof groove and intercommunication node, respectively fill the fire-resistant expansion strip of different expansion ratio;Bottom surface sets up honeycomb fireproof layer, including hexagonal honeycomb fireproof matrix, partition filling expanded vermiculite, ceramic fibre and expanded graphite in honeycomb unit;Through connecting assembly, upper and lower fireproof layer is connected to form three-dimensional staggered fireproof system.The utility model is through three-dimensional staggered fireproof design and hierarchical expansion response mechanism, solved the problem that traditional fireproof coating peels off and fails and single direction flame spreads, enhances the fireproof performance and structural safety of wood structure floor.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection technology for wooden structures, and in particular relates to a fireproof structure for floor slabs of wooden structures. Background Technology

[0002] As an important load-bearing and partitioning component in traditional wooden buildings, the fire resistance of wooden floor slabs is directly related to the structural safety and service life of the building. In traditional wooden buildings, fire protection measures for floor slabs usually adopt a single protection method such as surface coating with flame retardants or single-layer fireproof coating.

[0003] Wood, as a natural organic material, has significant flammability and undergoes complex physicochemical reactions such as pyrolysis and combustion under high temperatures. Current fire protection methods, such as surface coating with flame retardants or single-layer fire-retardant paints, are prone to coating failure and peeling under high-temperature fire conditions, failing to provide sustained and effective fire protection. This leads to the rapid combustion of wooden floor slabs and loss of load-bearing capacity. Furthermore, existing fire-resistant structures often employ a unidirectional fire-resistant groove design, allowing flames to spread rapidly along the groove direction, resulting in limited fire protection and failing to meet current fire resistance standards. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a fireproof structure for the floor slab of wooden buildings, which aims to solve the problems of fireproof coating failure and rapid spread of flame in one direction under high temperature environment in existing fireproof methods, and provide a three-dimensional fireproof solution for wooden buildings with strong fire resistance, long fire resistance time and convenient construction.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A fireproof structure for floor slabs in timber-framed buildings is characterized by comprising a timber-framed floor slab body, the upper surface of which is provided with an interlaced fireproof groove mesh structure. The interlaced fireproof groove mesh structure includes a main fireproof groove along the length of the floor slab, a first oblique fireproof groove arranged at an oblique angle to the main fireproof groove, and a second oblique fireproof groove arranged at an opposite oblique angle to the main fireproof groove. A connecting node is provided at the intersection of each fireproof groove. The bottom surface of the timber-framed floor slab body is provided with a honeycomb fireproof layer, which includes a honeycomb fireproof substrate. The interlaced fireproof groove mesh structure and the honeycomb fireproof layer are fixedly connected by connecting components.

[0007] Optionally, the main fireproof channel, the first inclined fireproof channel, and the second inclined fireproof channel are all filled with a first fire-resistant expansion strip, and the connecting nodes are filled with a second fire-resistant expansion strip.

[0008] Optionally, the honeycomb fireproof substrate has a hexagonal structure, and the honeycomb units are divided into zones filled with expanded vermiculite, ceramic fiber and expanded graphite.

[0009] Optionally, the bottom of the main body of the wooden floor slab is fixedly connected with several equally spaced and evenly distributed reinforcing ribs, and the reinforcing ribs are provided with equally spaced and evenly distributed through holes, and the outside of the reinforcing ribs is covered with fireproof gypsum board.

[0010] Optionally, the connecting assembly includes a T-shaped post fixedly connected to the reinforcing rib, and the T-shaped post is disposed at both ends of the reinforcing rib. A wedge-shaped hole is opened at the bottom end of the T-shaped post, and a buckle is snapped into the outer end of the T-shaped post. A wedge-shaped block matching the wedge-shaped hole is fixedly connected to the inner wall of the buckle.

[0011] Optionally, a top-layer decorative panel is fixedly connected to the top of the main wooden floor slab, and a bottom-layer decorative panel is fixedly connected to the bottom of the honeycomb fireproof substrate.

[0012] This utility model has the following advantages and beneficial effects:

[0013] This invention provides a three-dimensional staggered fireproof structure for wooden building floor slabs. It involves setting a staggered fireproof groove network structure on the upper surface of the wooden floor slab, including a main fireproof groove, a first oblique fireproof groove, a second oblique fireproof groove, and connecting nodes. A honeycomb fireproof layer is also provided on the bottom surface. When a fire occurs, the staggered fireproof groove network structure blocks the spread of flames from multiple directions. The first fire-resistant expansion strip in each groove begins to expand at 150°C to form a primary fire barrier. The second fire-resistant expansion strip at the connecting nodes expands first at 100°C to seal critical nodes. Expanded vermiculite, ceramic fiber, and expanded graphite, which are zonedly filled within the honeycomb fireproof matrix, work synergistically at different temperature stages. This three-dimensional staggered and graded response mechanism solves the problem of traditional single-layer fireproof coatings falling off and failing at high temperatures, overcomes the defect of rapid flame spread in unidirectional fireproof grooves, ensures that the wooden floor slab maintains its load-bearing capacity under fire conditions, further improves its fire resistance limit, and facilitates construction through modular connection components, significantly improving the fire safety of wooden buildings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the fireproof structure of the present invention for floor slabs in wooden buildings;

[0015] Figure 2 This is a front view of the fireproof structure of the present invention used for floor slabs in wooden buildings;

[0016] Figure 3 This utility model Figure 2 A cross-sectional view along the AA direction;

[0017] Figure 4This is a structural diagram of the honeycomb fireproof substrate of this utility model;

[0018] Figure 5 This is a structural diagram of the interlaced fireproof mesh of this utility model;

[0019] Figure 6 This is a structural diagram of the connecting component of this utility model;

[0020] Reference numerals in the attached drawings: 1. Main wooden floor slab; 2. Main fireproof groove; 3. First inclined fireproof groove; 4. Second inclined fireproof groove; 5. Connecting node; 6. First fire-resistant expansion strip; 7. Second fire-resistant expansion strip; 8. Honeycomb fireproof substrate; 9. Expanded vermiculite; 10. Ceramic fiber; 11. Expanded graphite; 12. Reinforcing rib; 13. Through hole; 14. Fireproof gypsum board; 15. T-shaped column; 16. Wedge hole; 17. Clip; 18. Wedge block; 19. Top decorative panel; 20. Bottom decorative panel. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Example

[0024] like Figures 1-5 As shown, this utility model provides a fireproof structure for floor slabs in wooden structures, including a wooden floor slab body 1. The upper surface of the wooden floor slab body 1 is provided with an interlaced fireproof groove mesh structure. The interlaced fireproof groove mesh structure includes a main fireproof groove 2 opened along the length of the floor slab, a first oblique fireproof groove 3 arranged at an oblique angle to the main fireproof groove 2, and a second oblique fireproof groove 4 arranged at an opposite oblique angle to the main fireproof groove 2. A connecting node 5 is provided at the intersection of each fireproof groove. The bottom surface of the wooden floor slab body 1 is provided with a honeycomb fireproof layer, which includes a honeycomb fireproof substrate 8. The interlaced fireproof groove mesh structure and the honeycomb fireproof layer are fixedly connected by connecting components.

[0025] In this embodiment, the main body 1 of the wooden floor slab is made of glued laminated timber or CLT plywood glued laminated timber, which has good mechanical properties and stability.

[0026] The main fireproof groove 2 is evenly opened along the length of the floor slab and is processed by a CNC grooving machine. The angle between the first inclined fireproof groove 3 and the main fireproof groove 2 is 45°, and the angle between the second inclined fireproof groove 4 and the main fireproof groove 2 is -45°. This staggered arrangement forms a three-dimensional fire protection network, which can effectively block the spread of flames in any direction.

[0027] Connecting node 5 is set at the intersection of each fireproof channel and is machined using a special drill bit to ensure that there is at least one connecting node 5 in any intersection area, so that the expansion material can play a concentrated role in sealing when a fire occurs.

[0028] The main fireproof groove 2, the first inclined fireproof groove 3, and the second inclined fireproof groove 4 are all filled with first fire-resistant expansion strips 6. The first fire-resistant expansion strips 6 are made of inorganic silicate-based materials with an expansion ratio of 1:20. They begin to expand and form a dense heat insulation barrier when the temperature reaches 150℃, thereby effectively preventing flames and heat from spreading into the floor slab. When filling, it is necessary to ensure that the expansion strips are tightly fitted to the groove walls without any gaps.

[0029] The connecting node 5 is filled with a second fire-resistant expansion strip 7, which is made of high-molecular composite material with an expansion ratio of 1:50. It begins to expand when the temperature reaches 100℃, ensuring its effectiveness in the early stages of a fire. Since the connecting node is the intersection of multiple channels, special attention must be paid to the compaction of the expansion strip to ensure that the filling density reaches 0.8~1.0g / cm³. 3 .

[0030] like Figure 4 As shown, the honeycomb fireproof substrate 8 has a hexagonal structure and is made of lightweight fireproof material. It has excellent heat insulation performance and structural strength. The hexagonal geometry provides optimal space utilization and mechanical properties. The honeycomb fireproof substrate 8 adopts a prefabricated modular design. During on-site assembly, the modules are sealed with special connecting adhesive to ensure integrity.

[0031] The entire honeycomb fireproof substrate module 8 is divided into three parts according to the area. All honeycomb cells in each area are filled with the same material. The honeycomb cells are filled with expanded vermiculite 9, ceramic fiber 10 and expanded graphite 11 in a volume ratio of 1:1:1. Expanded vermiculite 9 is made of natural vermiculite through high temperature expansion, which has excellent heat insulation performance and can form a porous heat insulation layer at high temperature. Ceramic fiber 10 is made of aluminum silicate fiber, which provides high temperature stability. Expanded graphite 11 is made of natural flake graphite through chemical treatment, which forms a worm-like heat insulation layer at high temperature, and has excellent flame retardant and heat insulation effects.

[0032] like Figure 3 and Figure 6As shown, the bottom end of the main body 1 of the wooden floor slab is fixedly connected with several equally spaced and evenly distributed reinforcing ribs 12. The reinforcing ribs 12 are made of Q235 steel, with a rectangular or I-shaped cross section, and are fixed with stainless steel bolts. They have good load-bearing capacity and corrosion resistance. The reinforcing ribs 12 are provided with equally spaced and evenly distributed through holes 13 for installing the reinforcing ribs 12.

[0033] The outer side of the reinforcing rib 12 is covered with fireproof gypsum board 14. The fireproof gypsum board 14 is made of fiber-reinforced fireproof gypsum and is bonded with special fireproof adhesive. The fireproof gypsum board 14 not only provides additional fire protection, but also absorbs the heat generated during combustion to a certain extent, thereby reducing the temperature at the bottom of the floor slab.

[0034] like Figure 6 As shown, the connecting assembly includes a T-shaped post 15 fixedly connected to the reinforcing rib 12, and the T-shaped post 15 is located at both ends of the reinforcing rib 12. The T-shaped post 15 is made of stainless steel, has a T-shaped cross section, and is connected to the reinforcing rib 12 by welding. The welding quality meets the relevant standard requirements and has good strength and corrosion resistance.

[0035] The bottom end of the T-shaped post 15 is provided with a wedge-shaped hole 16 to facilitate the insertion and locking of the wedge block 18. The outer end of the T-shaped post 15 is fitted with a buckle 17. The buckle 17 needs to be precisely positioned to ensure that it coincides with the wedge-shaped hole 16.

[0036] The inner wall of the buckle 17 is fixedly connected with a wedge block 18 that matches the wedge hole 16. The wedge block 18 is made of hard alloy steel, which has good wear resistance and strength. Its size is precisely matched with the wedge hole 16. This wedge connection design can provide strong locking force and can adapt to thermal expansion and contraction deformation during fire.

[0037] like Figure 6 As shown, a top-layer decorative panel 19 is fixedly connected to the top of the main wooden floor slab 1. The top-layer decorative panel 19 can be made of solid wood, composite wood flooring, or stone, with a thickness of 12-18mm. This maintains the natural beauty of the wooden structure while providing an additional protective layer for the floor slab surface. The fixing method depends on the panel material: wooden panels are fixed with wood screws, stone panels are fixed with dry-hanging brackets, and composite material panels are glued with special adhesive.

[0038] The bottom of the honeycomb fireproof substrate 8 is fixedly connected to a bottom decorative panel 19. The bottom decorative panel 20 is usually made of materials with good fire resistance, such as calcium silicate board or fiber cement board, with a fire resistance limit of not less than 1.0 hour, to ensure that the panel is flat and without warping. The top decorative panel 19 and the bottom decorative panel 20 are double fixed by special adhesives and mechanical fasteners to ensure that they will not fall off under fire conditions.

[0039] like Figures 1-6 As shown, when a fire occurs, the flames first come into contact with the interlaced fireproof mesh structure. The first fire-resistant expansion strip 6 in the main fireproof groove 2 begins to expand at 150°C, forming the first fire barrier and preventing the flames from spreading along the length of the floor slab. At the same time, the first fire-resistant expansion strip 6 in the first oblique fireproof groove 3 and the second oblique fireproof groove 4 also begins to expand, blocking the spread of flames from the 45° and -45° directions, forming a multi-directional blocking network.

[0040] When the temperature rises further to 100℃, the second fire-resistant expansion strip 7 in the connecting node 5 expands first, which can quickly seal the intersection of each fireproof groove, prevent the flame from spreading between grooves in different directions, and achieve a three-dimensional fireproof effect of "point and surface combination".

[0041] After the flames cannot penetrate the interlaced fireproof mesh structure, they continue to spread downwards and encounter the honeycomb fireproof layer. The expanded vermiculite 9 in the honeycomb unit plays its role first, forming a porous heat insulation layer at high temperature, which greatly reduces the heat conduction efficiency. The ceramic fiber 10 maintains its structural integrity at high temperatures above 1000℃, forming a stable fire-resistant skeleton. The expanded graphite 11 expands rapidly at high temperature, forming a worm-like heat insulation layer, which further enhances the heat insulation effect.

[0042] like Figures 1-6 As shown, during installation, the size and shape of the main wooden floor slab 1 are first determined according to the design drawings. An interlaced fireproof groove mesh structure is opened on its upper surface. The grooving operation is carried out by a CNC grooving machine. First, the main fireproof groove 2 is processed. Then, the first inclined fireproof groove 3 and the second inclined fireproof groove 4 are processed at 45° and -45° angles. Finally, connecting nodes 5 are drilled at the intersection of each groove.

[0043] Expansion strip filling: According to the material classification requirements, first fill the main fireproof groove 2, the first inclined fireproof groove 3 and the second inclined fireproof groove 4 with the first fire-resistant expansion strip 6. When filling, ensure that the expansion strip is tightly attached to the groove wall and the surface is flush with the floor slab surface. Then fill the connecting node 5 with the second fire-resistant expansion strip 7. Pay attention to the compaction requirements.

[0044] Honeycomb fireproof layer installation: The honeycomb fireproof substrate 8 is installed on the bottom surface of the main wooden floor slab 1 in a modular manner. The joints between modules are treated with special sealant. Then, according to the functional zoning requirements, expanded vermiculite 9, ceramic fiber 10 and expanded graphite 11 are filled into the honeycomb unit respectively. The filling sequence is from the outside to the inside and from the bottom to the top.

[0045] Reinforcing rib installation: Reinforcing ribs 12 are fixed at equal intervals at the bottom of the main body 1 of the wooden floor slab, and connected with stainless steel bolts. Finally, fireproof gypsum board 14 is wrapped on the outside.

[0046] Connection component installation: Weld the T-shaped column 15 to both ends of the reinforcing rib 12. After welding, open the wedge-shaped hole 16, install the buckle 17 and wedge block 18, and firmly connect the interlaced fireproof mesh structure and the honeycomb fireproof layer through the wedge connection.

[0047] Decorative panel installation: Finally, install the top decorative panel 18 and the bottom decorative panel 20. Select the appropriate fixing method according to the panel material. Seal all joints with fireproof sealant to ensure the integrity of the system.

[0048] Throughout the installation process, the fitting accuracy of the T-shaped column 15 with the wedge-shaped hole 16, the buckle 17 and the wedge block 18 directly affects the connection strength. After the wedge block 18 is inserted into the wedge hole 16, it forms a wedge-shaped self-locking mechanism, which can withstand the thermal stress and structural deformation during a fire, ensuring the stability and reliability of the three-dimensional interlocking fire protection system under various working conditions.

[0049] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fireproof structure for a wooden structure building floor, characterized by, The wood structure floor body (1) is provided with staggered fireproof groove network structure on the upper surface, which comprises main fireproof grooves (2) opened along the length direction of the floor, first diagonal fireproof grooves (3) arranged at an oblique angle with the main fireproof grooves (2), second diagonal fireproof grooves (4) arranged at an opposite oblique angle with the main fireproof grooves (2), and communication nodes (5) opened at the intersection of each fireproof groove, and the bottom surface of the wood structure floor body (1) is provided with a honeycomb fireproof layer, which comprises a honeycomb fireproof base body (8), and the staggered fireproof groove network structure and the honeycomb fireproof layer are fixedly connected through a connecting assembly.

2. A fireproof structure for a wooden structure building floor according to claim 1, characterized in that: The main fireproof grooves (2), the first diagonal fireproof grooves (3) and the second diagonal fireproof grooves (4) are filled with first fireproof expansion strips (6), and the communication nodes (5) are filled with second fireproof expansion strips (7).

3. A fireproof structure for a wooden structure building floor according to claim 1, characterized in that: The honeycomb fireproof base body (8) is a hexagonal structure, and the honeycomb unit is partitioned and filled with expanded vermiculite (9), ceramic fiber (10) and expanded graphite (11).

4. A fireproof structure for a wooden structure building floor according to claim 1, characterized in that: The bottom end of the wood structure floor body (1) is fixedly connected with a plurality of equally spaced reinforcing ribs (12) uniformly distributed, the reinforcing ribs (12) are provided with equally spaced through holes (13) uniformly distributed, and the outer side of the reinforcing ribs (12) is covered with fireproof gypsum boards (14).

5. A fireproof structure for a wooden structure building floor according to claim 1, characterized in that: The connecting assembly comprises a T-shaped column (15) fixedly connected with the reinforcing ribs (12), and the T-shaped column (15) is arranged at both ends of the reinforcing ribs (12), the bottom end of the T-shaped column (15) is provided with a wedge-shaped hole (16), the outer end of the T-shaped column (15) is provided with a buckle (17), and the inner wall of the buckle (17) is fixedly connected with a wedge-shaped block (18) matched with the wedge-shaped hole (16).

6. A fireproof structure for a wooden structure building floor according to claim 2, wherein: The top end of the wood structure floor body (1) is fixedly connected with a top decorative panel (19), and the bottom end of the honeycomb fireproof base body (8) is fixedly connected with a bottom decorative panel (20).

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