Fireproof and flame-retardant type building suspended ceiling keel structure

Abstract

The utility model relates to building technical field discloses fire -retardant type building ceiling joist structure, including main support subassembly and vice support subassembly, the main support subassembly is provided with two, vice support subassembly is provided with two, the main support subassembly is fixedly connected with vice support subassembly end portion, the main support subassembly is provided with equidistance distribution's horizontal reinforcing rib inside, the main support subassembly is provided with equidistance distribution's longitudinal reinforcing rib inside. The utility model discloses setting up the fire -retardant protective layer to play the role of the isolation oxygen, inhibits the combustion, along with temperature rise, the fire -retardant coating expands and forms the dense heat -insulating carbon layer rapidly, prevents the heat to main support subassembly and vice support subassembly transmission, then through the horizontal reinforcing rib and longitudinal reinforcing rib that set up inside main support subassembly and vice support subassembly can keep better structural strength under high temperature, avoid main support subassembly and vice support subassembly deformation collapse.

Description

Technical Field

[0001] This utility model belongs to the field of building technology, specifically, it relates to a fireproof and flame-retardant building ceiling keel structure. Background Technology

[0002] Ceiling joists are crucial load-bearing components in building ceiling projects; they are what we commonly see as ceiling panels, primarily used to support the ceiling surface and transfer loads to the building's foundation. Currently, most ceiling joists are made of steel. While they possess a certain structural strength, their fire resistance and flame retardancy are poor. In the event of a fire, ordinary steel joists are prone to rapid heating under high temperatures, leading to decreased strength, deformation, and even collapse. This can cause the ceiling surface to detach, posing significant hazards to evacuation and fire rescue efforts.

[0003] To improve the fire resistance of keel, some manufacturers apply fire-retardant coatings to the surface of the keel. However, a single fire-retardant coating is prone to peeling off under high temperature for a long time, resulting in limited fire resistance. Furthermore, keels made of ordinary steel have insufficient resistance to deformation at high temperatures, making it difficult to meet the needs of high-rise buildings, public places, and other scenarios with high fire protection requirements.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A fire-resistant and flame-retardant building ceiling keel structure includes a main support assembly and a secondary support assembly. Two main support assemblies and two secondary support assemblies are symmetrically arranged. The ends of the main support assemblies and secondary support assemblies are fixedly connected. The main support assembly has equidistantly distributed transverse reinforcing ribs and equidistantly distributed longitudinal reinforcing ribs inside. The secondary support assemblies have the same internal structure as the main support assemblies. The outer wall of the main support assembly is sequentially coated with a fire-retardant coating and a flame-retardant protective layer. The outer wall structure of the secondary support assemblies is the same as that of the main support assemblies. Equidistantly distributed secondary keels are fixedly connected to opposite sides of the bottom of the main support assembly. The secondary keels have installation grooves inside, and flame-retardant filling layers are provided inside the installation grooves. Equidistantly distributed ventilation holes are provided on the secondary keels, and the ventilation holes communicate with the installation grooves.

[0007] In a preferred embodiment of this utility model, the fireproof coating is an intumescent fireproof coating layer with a thickness of 1.0 mm, and the flame-retardant protective layer is a polytetrafluoroethylene coating with a thickness of 0.4 mm.

[0008] In a preferred embodiment of this utility model, the flame-retardant filling layer is magnesium hydroxide flame-retardant foam, and the magnesium hydroxide flame-retardant foam is filled and disposed inside the secondary keel.

[0009] In a preferred embodiment of the present invention, the main support assembly includes a main keel, a reinforcing plate, and a fixed keel. The main keel is located at the bottom, the fixed keel is located at the top, and multiple reinforcing plates are equidistantly arranged. The reinforcing plates are fixedly connected to the outer wall of the main keel and the fixed keel on opposite sides. The two ends of the secondary keel are fixedly connected to the outer wall of the main keel on opposite sides.

[0010] In a preferred embodiment of the present invention, the secondary support assembly includes a side keel, a second reinforcing plate, and a second fixed keel. The side keel is located at the bottom, the second fixed keel is located at the top, and multiple second reinforcing plates are equidistantly arranged, and the second reinforcing plates are fixedly connected to the outer wall of the opposite side of the side keel and the second fixed keel.

[0011] In a preferred embodiment of this utility model, the end of the main keel is fixedly connected to the end of the side keel, and the first end of the fixed keel is fixedly connected to the second end of the fixed keel.

[0012] In a preferred embodiment of this utility model, the main keel and the side keel are provided with equally spaced mounting cavities, and the transverse reinforcing ribs are fixedly connected to the inside of the mounting cavities.

[0013] In a preferred embodiment of this utility model, both the first reinforcing plate and the second reinforcing plate have an inner cavity 2, and the longitudinal reinforcing rib is fixedly connected to the inner side of the second mounting cavity.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention utilizes a flame-retardant protective layer to isolate oxygen and suppress combustion. As the temperature rises, the fire-retardant coating rapidly expands to form a dense, heat-insulating char layer, preventing heat transfer to the main and secondary support components. Furthermore, the transverse and longitudinal reinforcing ribs within the main and secondary support components maintain good structural strength at high temperatures, preventing deformation and collapse. The flame-retardant filling layer inside the secondary keel decomposes and absorbs heat, while the ventilation holes release water vapor to dilute flammable gases. Simultaneously, the ventilation holes balance the internal and external air pressure of the secondary keel, preventing structural damage. This comprehensive fire-retardant protection effectively enhances the fire resistance of the ceiling keel structure and provides resistance to deformation at high temperatures, meeting the needs of scenarios with high fire protection requirements.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the main structure of the fireproof and flame-retardant building ceiling keel structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the main keel and reinforcing plate of the fireproof and flame-retardant building ceiling keel structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the secondary keel structure of the fireproof and flame-retardant building ceiling keel structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the secondary keel of the fireproof and flame-retardant building ceiling keel structure of this utility model;

[0022] Figure 5 This is a partial cross-sectional view of the main keel of the fireproof and flame-retardant building ceiling keel structure of this utility model.

[0023] In the diagram: 1. Main support assembly; 101. Main keel; 102. Reinforcing plate one; 103. Fixed keel one; 2. Sub-support assembly; 201. Side keel; 202. Reinforcing plate two; 203. Fixed keel two; 3. Sub-keel; 4. Fireproof coating; 5. Flame-retardant protective layer; 6. Mounting cavity one; 7. Transverse reinforcing rib; 8. Mounting cavity two; 9. Longitudinal reinforcing rib; 10. Ventilation hole; 11. Mounting groove; 12. Flame-retardant filling layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0025] like Figures 1 to 5 As shown

[0026] The fire-resistant and flame-retardant ceiling keel structure includes a main support assembly 1 and a secondary support assembly 2. Two main support assemblies 1 and two secondary support assemblies 2 are symmetrically arranged. The ends of the main support assemblies 1 and 2 are fixedly connected. The main support assembly 1 has equidistantly distributed transverse reinforcing ribs 7 and equidistantly distributed longitudinal reinforcing ribs 9. The secondary support assembly 2 has the same internal structure as the main support assembly 1. The outer wall of the main support assembly 1 is sequentially composited with a fire-resistant coating 4 and a flame-retardant protective layer 5. The outer wall structure of the secondary support assembly 2 is the same as that of the main support assembly 1. The fire-resistant coating 4 is an intumescent fire-resistant coating layer with a thickness of 1.0 mm, and the flame-retardant protective layer 5 is a polytetrafluoroethylene coating with a thickness of 0.4 mm. In the event of a fire, the flame-retardant protective layer 5 will prevent the fire from spreading. The protective layer 5 acts as an oxygen barrier, inhibiting combustion. As the temperature rises, the fireproof coating 4 rapidly expands to form a dense, heat-insulating char layer, preventing heat from being transferred to the main support assembly 1 and the secondary support assembly 2. The main support assembly 1 has two equally spaced secondary keels 3 fixedly connected to opposite sides of its bottom. Each secondary keel 3 has an installation groove 11 inside, and a flame-retardant filling layer 12 is provided inside the installation groove 11. The flame-retardant filling layer 12 is magnesium hydroxide flame-retardant foam, and this foam is filled inside the secondary keel 3. The secondary keel 3 has equally spaced ventilation holes 10, which communicate with the installation groove 11. The flame-retardant filling layer 12 can decompose and absorb heat, and in conjunction with the ventilation holes 10, it releases water vapor to dilute combustible gases. Simultaneously, the ventilation holes 10 can balance the internal and external air pressure of the secondary keel 3, preventing structural damage.

[0027] In a specific embodiment, the main support assembly 1 includes a main keel 101, a reinforcing plate 102, and a fixed keel 103. The main keel 101 is located at the bottom, the fixed keel 103 is located at the top, and multiple reinforcing plates 102 are equidistantly arranged. The reinforcing plates 102 are fixedly connected to the outer wall of the main keel 101 and the fixed keel 103 on opposite sides. The two ends of the secondary keel 3 are fixedly connected to the outer wall of the main keel 101 on opposite sides.

[0028] Furthermore, the secondary support assembly 2 includes a side keel 201, a second reinforcing plate 202, and a second fixed keel 203. The side keel 201 is located at the bottom, and the second fixed keel 203 is located at the top. Multiple second reinforcing plates 202 are equidistantly arranged and are fixedly connected to the outer wall of the opposite side of the side keel 201 and the second fixed keel 203. The end of the main keel 101 is fixedly connected to the end of the side keel 201, and the end of the first fixed keel 103 is fixedly connected to the end of the second fixed keel 203.

[0029] Furthermore, both the main keel 101 and the side keel 201 have equidistantly distributed mounting cavities 6 on their inner sides. The transverse reinforcing ribs 7 are fixedly connected to the inner side of the mounting cavity 6. Both the reinforcing plate 102 and the reinforcing plate 202 have mounting cavities 8 on their inner sides. The longitudinal reinforcing ribs 9 are fixedly connected to the inner side of the mounting cavity 8. The transverse reinforcing ribs 7 and the longitudinal reinforcing ribs 9 can maintain good structural strength at high temperatures, preventing the main support assembly 1 and the secondary support assembly 2 from deforming and collapsing.

[0030] The implementation principle of the fire-resistant and flame-retardant building ceiling keel structure in this embodiment is as follows: When a fire occurs, the flame-retardant protective layer 5 (polytetrafluoroethylene coating) on ​​the surface of the main support assembly 1 and the secondary support assembly 2 first plays the role of isolating oxygen and inhibiting combustion. As the temperature rises, the fire-retardant coating 4 (intumescent fire-retardant coating layer) rapidly expands to form a dense heat-insulating carbon layer, preventing heat from being transferred to the main support assembly 1 and the secondary support assembly 2. The transverse reinforcing ribs 7 and longitudinal reinforcing ribs 9 inside the main support assembly 1 and the secondary support assembly 2 maintain good structural strength at high temperatures, preventing the main support assembly 1 and the secondary support assembly 2 from deforming and collapsing. Furthermore, the flame-retardant filling layer 12 (magnesium hydroxide flame-retardant foam) inside the secondary keel 3 can decompose and absorb heat. In conjunction with the ventilation holes 10, water vapor is released to dilute flammable gases. At the same time, the ventilation holes 10 can balance the air pressure inside and outside the secondary keel 3, preventing structural damage, thereby forming comprehensive fire-retardant protection.

Claims

1. A fire-resistant and flame-retardant building ceiling keel structure, comprising a main support assembly (1) and a secondary support assembly (2), characterized in that, Two main support components (1) are symmetrically arranged, and two secondary support components (2) are symmetrically arranged. The ends of the main support components (1) and the secondary support components (2) are fixedly connected. The main support components (1) are provided with equidistantly distributed transverse reinforcing ribs (7) and equidistantly distributed longitudinal reinforcing ribs (9). The secondary support components (2) have the same internal structure as the main support components (1). The outer wall of the main support components (1) is sequentially provided with a fireproof coating (4) and a flame-retardant protective layer (5). The outer wall structure of the secondary support components (2) is the same as that of the main support components (1). The bottom of the main support components (1) is fixedly connected with equidistantly distributed secondary keels (3). The secondary keels (3) have an installation groove (11) inside. The inner side of the installation groove (11) is provided with a flame-retardant filling layer (12). The secondary keels (3) have equidistantly distributed ventilation holes (10) on them. The ventilation holes (10) are connected to the installation groove (11).

2. The fire-resistant and flame-retardant building ceiling keel structure according to claim 1, characterized in that, The fireproof coating (4) is an intumescent fireproof coating layer with a thickness of 1.0 mm, and the flame-retardant protective layer (5) is a polytetrafluoroethylene coating with a thickness of 0.4 mm.

3. The fire-resistant and flame-retardant building ceiling keel structure according to claim 1, characterized in that, The flame-retardant filling layer (12) is magnesium hydroxide flame-retardant foam, and the magnesium hydroxide flame-retardant foam is filled inside the secondary keel (3).

4. The fire-resistant and flame-retardant building ceiling keel structure according to claim 1, characterized in that, The main support assembly (1) includes a main keel (101), a reinforcing plate (102), and a fixed keel (103). The main keel (101) is located at the bottom, and the fixed keel (103) is located at the top. Multiple reinforcing plates (102) are evenly spaced and are fixedly connected to the outer wall of the main keel (101) and the fixed keel (103) on opposite sides. The secondary keel (3) is fixedly connected at both ends to the outer wall of the main keel (101) on opposite sides.

5. The fire-resistant and flame-retardant building ceiling keel structure according to claim 4, characterized in that, The sub-support assembly (2) includes a side keel (201), a second reinforcing plate (202), and a second fixed keel (203). The side keel (201) is located at the bottom, and the second fixed keel (203) is located at the top. Multiple second reinforcing plates (202) are evenly spaced and are fixedly connected to the outer wall of the side keel (201) and the second fixed keel (203) on opposite sides.

6. The fire-resistant and flame-retardant building ceiling keel structure according to claim 5, characterized in that, The end of the main keel (101) is fixedly connected to the end of the side keel (201), and the end of the first fixed keel (103) is fixedly connected to the end of the second fixed keel (203).

7. The fire-resistant and flame-retardant building ceiling keel structure according to claim 5, characterized in that, The main keel (101) and the side keel (201) are provided with equally spaced mounting cavities (6) on their inner sides, and the transverse reinforcing ribs (7) are fixedly connected to the inner side of the mounting cavity (6).

8. The fire-resistant and flame-retardant building ceiling keel structure according to claim 5, characterized in that, The inner sides of both the first reinforcing plate (102) and the second reinforcing plate (202) are provided with mounting cavities (8), and the longitudinal reinforcing ribs (9) are fixedly connected to the inner side of the mounting cavities (8).

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