A fireproof sealing structure for steel structures

Abstract

This utility model provides a fireproof sealing structure for steel structures, belonging to the field of building engineering technology. It solves the technical problems of poor fire resistance, poor durability, and poor aesthetics in existing technologies. The fireproof sealing structure for steel structures includes a floor slab and connected steel beams. The floor slab and steel beams are respectively provided with cable perforations for floor cables and steel beam cables. Cables are threaded through these perforations, and annular movable gaps are provided between the cables and the perforations. Fireproof sealing rings for the floor slab and steel beams are respectively provided between the cable perforations and the cables to seal their respective annular movable gaps. Both the fireproof sealing rings have expansion joints that can seal and prevent the force of cable swaying from being transmitted to the respective floor slab and steel beam. This utility model has the advantages of strong fire resistance, good aesthetics, and high durability.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and relates to fire protection engineering, and in particular to a fireproof sealing structure for steel structures. Background Technology

[0002] Fire sealing is an important building safety measure. It aims to seal or fill gaps and penetrations in buildings using materials with fire-resistant, smoke-proof, and heat-insulating properties to prevent the spread of heat, flames, and smoke, thereby preventing the spread of fire and protecting people and property. Current fire sealing technologies are mostly solid structures, which cannot handle the special building structures where cables pass through walls. Researchers have conducted extensive research and proposed various solutions to address this issue.

[0003] For example, a Chinese patent document discloses a fireproof sealing structure for cables passing through walls without stress [application number: 201920571720.1], which includes a wall, a through-hole, a cable, a flame-retardant fiber filling layer, a fireproof partition, bolts, and a flexible organic fireproof sealing material layer; the wall has a through-hole; the cable passes through the through-hole; the through-hole is filled with a flame-retardant fiber filling layer; adjacent cables are spaced apart; fireproof partitions are provided on both sides of the through-hole, and the fireproof partitions are fixed to the wall by bolts; a flexible organic fireproof sealing material layer is provided on the outer surface of the fireproof partitions around the cable; this technology can be applied to special building structures where cables pass through walls, and has the advantage of low stress on the cables.

[0004] While the above solution can be applied to special building structures where cables pass through walls and has the advantage of low cable stress, the overall structure is prone to damage and has poor aesthetics. Furthermore, during use, movement between the cable and the fire seal can damage the fire seal or reduce its fire resistance. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a fireproof sealing structure for steel structures that offers strong and stable fire resistance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fireproof sealing structure for a steel structure includes a floor slab and a connected steel beam. The floor slab and the steel beam are respectively provided with floor cable perforations and steel beam cable perforations. Cables are threaded through the floor cable perforations and steel beam cable perforations. Annular movable gaps are provided between the cables and the floor cable perforations and steel beam cable perforations. Fireproof sealing rings for the floor slab and steel beams are respectively provided between the floor cable perforations and steel beam cable perforations and the cables to seal their respective annular movable gaps. The fireproof sealing rings for the floor slab and steel beams are each provided with expansion and contraction deformation parts that can be used for sealing and preventing the force of cable swaying from being transmitted to their respective floor slabs and steel beams.

[0007] Fire-resistant sealing rings for the floor slabs and steel beams are installed at both ends to seal the gaps between the cables and the floor slabs and steel beams. While sealing the gaps, the fire-resistant sealing rings for both floor slabs and steel beams are equipped with expansion joints. When the cables move between the cables and the floor slabs and steel beams, these expansion joints will deform accordingly, preventing stress from being transmitted to the cables. This avoids stress damage to the structure and maintains stable and good fire resistance.

[0008] In the aforementioned fireproof sealing structure for steel structures, both the floor slab fireproof sealing ring and the steel beam fireproof sealing ring include an inner ring and an outer ring, which are connected by a telescopic deformation section. The inner ring is welded and fixed to the cable and moves synchronously with it; the outer ring is fixed to the floor slab or steel beam and integrally connected to the building structure. The telescopic deformation section acts as a flexible bridge connecting the two. When the cable experiences axial displacement or slight swaying, the inner ring moves accordingly, while the outer ring remains stationary. The telescopic deformation section absorbs displacement through its own deformation, preventing the cable from swaying or transmitting displacement, while also preventing the sealing structure from tearing and failing due to stress concentration.

[0009] In the aforementioned fire-resistant sealing structure for steel structures, the inner ring is welded to a cable, and the outer ring is fixed to the floor slab or steel beam using nails. The outer ring, fixed to the floor slab or steel beam with nails, forms a semi-rigid connection. The nails allow for adaptive adjustments to the outer ring within a small range, while preventing the cable's sway from being directly transmitted to the building structure. This fixing method ensures that relative movement is absorbed by the expansion joint and creates a smooth surface, facilitating subsequent full-coverage application of fire-retardant coating.

[0010] In the aforementioned fireproof sealing structure of a steel structure, a bent plate is provided on the inner side of the inner ring body. The bent plate is positioned towards the outer end of the annular movable gap, and the inner ring body is welded to the cable through the outer end of the bent plate. During a fire, there is a difference in linearity between the cable and the inner ring body. The flexible deformation capacity of the bent plate can compensate for the difference in expansion, preventing the inner ring body from twisting and cracking due to restricted expansion, and avoiding the impact of high temperature on the performance of the fireproof sealing structure.

[0011] In the aforementioned fireproof sealing structure for steel structures, the expansion and contraction section includes a deformation ring with a non-linear longitudinal section. The inner side of the deformation ring is connected to the outer side of the inner ring body and is integrally formed, while the outer side of the deformation ring is connected to the inner side of the outer ring body and is integrally formed. The corrugated structure of the deformation ring can be compressed or stretched, efficiently absorbing axial displacement. Furthermore, the flexibility of the non-linear longitudinal section allows the deformation ring to bend laterally or deflect at an angle, better adapting to cable installation errors and slight swaying.

[0012] In the aforementioned fireproof sealing structure for steel structures, the longitudinal section of the deformation ring is any one or more of the following shapes: V-shaped, U-shaped, S-shaped, or Z-shaped. Deformation rings with different cross-sectional shapes can adapt to different regions. Due to the influence of temperature and geological activity on the degree of deformation and vibration control requirements, for example, a high-stiffness V-shaped ring can be selected for vibration suppression in areas with strong wind vibration, an S-shaped or Z-shaped ring can be selected for large displacement scenarios, and a low-stiffness S-shaped ring can be selected for high-sensitivity compensation.

[0013] In the above-mentioned fireproof sealing structure of steel structure, the outer ring body includes at least two outer arc-shaped rings distributed along the circumferential direction, and the ends of two adjacent outer arc-shaped rings are welded together.

[0014] The deformation ring includes at least two deformation arc rings distributed along the circumferential direction, and the adjacent ends of two adjacent deformation arc rings are welded together.

[0015] The inner ring body includes at least two inner arc-shaped rings distributed along the circumferential direction, and the adjacent ends of two adjacent inner arc-shaped rings are welded together.

[0016] The number of outer arc rings, deformable arc rings and inner arc rings are equal and correspond one-to-one. The inner side of the outer arc ring is connected to the outer side of the deformable arc ring, and the inner side of the deformable arc ring is connected to the outer side of the inner arc ring.

[0017] The outer ring, deformation ring, and inner ring are all designed as multi-segment arc-shaped ring assemblies, and are connected into a whole through segmented manufacturing and welding. This avoids the accumulation of expansion stress, and each segment of the deformation arc-shaped ring can be independently compressed / stretched. When the cable is subjected to eccentric force, the arc segments in different directions deform as needed, preventing overall torsion failure. The welds between adjacent arc segments form a flexible connection, which can further absorb asymmetric stress and ensure good fire resistance.

[0018] In the aforementioned fireproof sealing structure for steel structures, fire-retardant coatings are applied between the cables and the fireproof sealing rings of the floor slab and steel beams. Fire-retardant coatings are also applied between the fireproof sealing rings of the floor slab and the floor slab, and between the fireproof sealing rings of the steel beams and the steel beams, covering the outer surfaces of both fireproof sealing rings. Applying fire-retardant coatings between the cables and the sealing rings seals microscopic gaps at the metal contact surfaces, preventing flames from spreading along the cable surface. Coatings between the sealing rings and the floor slab and steel beams fill assembly gaps such as nail holes and weld seams, eliminating fire spread pathways at the structural interfaces. A fire-resistant protective layer is provided for the flexible, expandable deformation parts, preventing them from failing due to direct exposure to flames.

[0019] In the aforementioned fireproof sealing structure for a steel structure, an annular outer plate is provided between the floor slab cable perforations and the steel beam cable perforations. The upper and lower ends of the outer plate are integrally connected to the floor slab and the steel beam, respectively. An annular layer of fireproof rock wool is provided between the outer plate, the floor slab fireproof sealing ring, and the cable and steel beam fireproof sealing ring. The upper and lower ends of the outer plate form annular sealed chambers with the floor slab and the steel beam, respectively, enclosing the cable perforation area as an independent fireproof unit. The fireproof rock wool layer filling the annular space between the outer plate, the sealing ring, and the cable can block the lateral spread of flames and high-temperature heat conduction, further improving fire resistance.

[0020] In the aforementioned fireproof sealing structure for steel structures, the central axis of the cable is inclined to the floor slab and steel beam, which are parallel to each other. Both the cable perforations in the floor slab and steel beam are oblique holes with their central axes concentric with the cable's central axis. Forcing vertical perforations would cause the cable to bend at the perforation point, generating additional installation stress and localized stress concentration. The concentric oblique hole design allows the cable to pass through the floor slab and steel beam close to its natural tension direction, significantly reducing bending stress during installation and avoiding unnecessary damage or stress concentration to the cable.

[0021] Compared with existing technologies, the advantages of this fireproof sealing structure for steel structures are: 1. Strong overall structural integrity, easy installation, and aesthetically pleasing appearance. 2. Multi-layered fireproof structure with excellent fire resistance. 3. Low stress transmitted to the cables, making them less prone to damage. 4. Able to accommodate swaying between the cables and the floor structure, exhibiting high durability. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram provided by this utility model.

[0023] Figure 2 This is a schematic diagram of the fireproof sealing ring structure provided by this utility model.

[0024] In the diagram, floor slab 1, floor slab cable perforation 11, steel beam 2, steel beam cable perforation 21, cable 3, annular movable gap 4, floor slab fireproof sealing ring 41, steel beam fireproof sealing ring 42, expansion and contraction section 43, deformation ring 431, deformation arc ring 432, inner ring body 44, bending plate 441, inner arc ring 442, outer ring body 45, outer arc ring 451, outer perimeter plate 46, fireproof rock wool layer 47, nail gun 5, and fireproof coating 6. Detailed Implementation

[0025] like Figure 1As shown, this fireproof sealing structure for steel structure includes a floor slab 1 and a connected steel beam 2. The floor slab 1 and the steel beam 2 are respectively provided with floor cable through holes 11 and steel beam cable through holes 21. Cables 3 are threaded through the floor cable through holes 11 and steel beam cable through holes 21. Annular movable gaps 4 are provided between the cables 3 and the floor cable through holes 11 and steel beam cable through holes 21. Fireproof sealing rings 41 for sealing the respective annular movable gaps 4 are provided between the floor cable through holes 11 and steel beam cable through holes 21 and the cables 3. The fireproof sealing rings 41 and steel beam fireproof sealing rings 42 are each provided with expansion and contraction parts 43 that can prevent the force of the cable 3 from shaking from being transmitted to the respective floor slab 1 and steel beam 2.

[0026] In this embodiment, a fireproof sealing ring 41 for the floor slab and a fireproof sealing ring 42 for the steel beam are installed to seal the gaps between the cable 3 and the floor slab 1 and the steel beam 2. While sealing the gaps, the cable 3 and the floor slab 1 and the steel beam 2 are provided with expansion and contraction parts 43. When the cable 3 shakes with the floor slab 1 and the steel beam 2, the expansion and contraction parts 43 will adapt to the deformation and no stress will be transmitted to the cable 3.

[0027] More specifically, both the floor slab fireproof sealing ring 41 and the steel beam fireproof sealing ring 42 include an inner ring body 44 and an outer ring body 45, with the inner ring body 44 and the outer ring body 45 connected by a telescopic deformation part 43.

[0028] More specifically, the inner ring 44 is welded to the cable 3 on its inner side, and the outer ring 45 is fixed to the floor slab or steel beam 2 by means of nails 5.

[0029] More specifically, the inner ring body 44 has a bent plate 441 formed by bending on its inner side. The bent plate 441 is positioned towards the outer end of the annular movable gap 4, and the inner ring body 44 is welded to the cable 3 through the outer end of the bent plate 441.

[0030] More specifically, the telescopic deformation part 43 includes a deformation ring 431 with a non-linear longitudinal section. The inner side of the deformation ring 431 is connected to the outer side of the inner ring body 44 and is integrated with it. The outer side of the deformation ring 431 is connected to the inner side of the outer ring body 45 and is integrated with it. The longitudinal section of the deformation ring 431 is V-shaped.

[0031] like Figure 2 As shown, the outer ring body 45 includes two outer arc-shaped rings 451 distributed along the circumferential direction, and the ends of two adjacent outer arc-shaped rings 451 are welded together.

[0032] The deformation ring 431 includes two deformation arc rings 432 distributed along the circumferential direction, and the adjacent ends of two adjacent deformation arc rings 432 are welded together.

[0033] The inner ring body 44 includes two inner arc-shaped rings 442 distributed along the circumferential direction, and the adjacent ends of the two adjacent inner arc-shaped rings 442 are welded together.

[0034] The number of outer arc ring 451, deformable arc ring 432 and inner arc ring 442 are equal and correspond one-to-one. The inner side of the outer arc ring 451 is connected to the outer side of the deformable arc ring 432, and the inner side of the deformable arc ring 432 is connected to the outer side of the inner arc ring 442.

[0035] More specifically, fire-retardant coating 6 is provided between the cable 3 and the fire-resistant sealing ring 41 of the floor slab and the fire-resistant sealing ring 42 of the steel beam. Fire-retardant coating 6 is also provided between the fire-resistant sealing ring 41 of the floor slab and the floor slab 1, and between the fire-resistant sealing ring 42 of the steel beam and the steel beam 2. The fire-retardant coating 6 covers the outer surface of the fire-resistant sealing ring 41 of the floor slab and the fire-resistant sealing ring 42 of the steel beam.

[0036] In this embodiment, the fire-retardant coating 6 is a thick-coat type fire-retardant coating. Using a thick-coat type fire-retardant coating enhances fire resistance while also making the fire-retardant coating 6 less prone to cracking when shaken. Furthermore, the fire-retardant coating, after spraying, provides a strong overall effect, is aesthetically pleasing, and is easy to maintain.

[0037] More specifically, an annular outer plate 46 is provided between the floor slab cable perforation 11 and the steel beam cable perforation 21. The upper and lower ends of the outer plate 46 are connected to the floor slab 1 and the steel beam 2 respectively. An annular fireproof rock wool layer 47 is provided between the outer plate 46, the floor slab fireproof sealing ring 41, the cable 3 and the steel beam fireproof sealing ring 42.

[0038] More specifically, the central axis of cable 3 is inclined to the floor slab and steel beam, and the floor slab and steel beam are parallel; the cable through hole 11 in the floor slab and the cable through hole 21 in the steel beam are both oblique holes and their central axes are concentric with the central axis of cable 3.

[0039] The working principle of this embodiment is as follows: first, an outer plate 46 is set between the cable perforation 11 in the floor slab and the cable perforation 21 in the steel beam; then, the two outer arc rings 451, the deformable arc ring 432 and the inner arc ring 442 of the fireproof sealing ring 41 of the floor slab are welded and fixed to the cable 3, and then the fireproof sealing ring 41 of the floor slab is fixed to the bottom of the floor slab 1 by the nail gun 5.

[0040] Next, fill the gap with fireproof rock wool layer 47, and then weld and fix the steel beam fireproof sealing ring 42 to the cable 3 and fix it with nail 5; finally, cover the floor slab fireproof sealing ring 41 and floor slab 1 and the steel beam fireproof sealing ring 42 and steel beam 2 with fireproof coating 6 to complete the installation.

[0041] After installation, when there is swaying between the cable 3, the floor slab 1, and the steel beam 2, the stress will be preferentially transmitted to the expansion and contraction part 43 to adapt to the deformation. The cable 3 will not be affected by the stress, and the surface is covered with a thick flexible fireproof coating 6, which ensures fire resistance and aesthetics while preventing cracking during swaying.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0043] Although this document frequently uses terms such as floor slab, floor slab cable perforation, steel beam, steel beam cable perforation, cable, annular movable gap, floor slab fireproof sealing ring, steel beam fireproof sealing ring, expansion joint, deformation ring, deformation arc ring, inner ring body, bent plate, inner arc ring, outer ring body, outer arc ring, outer perimeter plate, fireproof rock wool layer, nail gun, and fireproof coating, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A fireproof plugging structure of a steel structure, characterized by, The system includes a floor slab (1) and a steel beam (2) connected thereto. The floor slab (1) and the steel beam (2) are respectively provided with floor cable through holes (11) and steel beam cable through holes (21). Cables (3) are threaded through the floor cable through holes (11) and steel beam cable through holes (21). There are annular movable gaps (4) between the cables (3) and the floor cable through holes (11) and the steel beam cable through holes (21). There are floor fireproof sealing rings (41) and steel beam fireproof sealing rings (42) between the floor cable through holes (11) and the steel beam cable through holes (21) and the cables (3) respectively for sealing their respective annular movable gaps (4). The floor fireproof sealing rings (41) and steel beam fireproof sealing rings (42) are respectively provided with expansion and contraction parts (43) that can be used for sealing and prevent the force of the cable (3) from shaking from being transmitted to their respective floor slabs (1) and steel beams (2).

2. A fire stopping construction for a steel structure according to claim 1, wherein The fireproof sealing ring (41) for the floor slab and the fireproof sealing ring (42) for the steel beam both include an inner ring body (44) and an outer ring body (45), and the inner ring body (44) and the outer ring body (45) are connected by a telescopic deformation part (43).

3. A fire stopping construction for a steel structure according to claim 2, wherein The inner ring (44) is welded to the cable (3) on the inside, and the outer ring (45) is fixed to the floor slab or steel beam (2) by a nail (5).

4. A fire stopping construction for a steel structure according to claim 3, wherein The inner ring body (44) is provided with a bent plate (441) formed by bending. The bent plate (441) is positioned towards the outer end of the annular movable gap (4), and the inner ring body (44) is welded to the cable (3) through the outer end of the bent plate (441).

5. A fire stopping construction of a steel structure according to claim 1 or 2 or 3 or 4, characterized in that, The stretching deformation part (43) includes a deformation ring (431) with a non-linear longitudinal section. The inner side of the deformation ring (431) is connected to the outer side of the inner ring body (44) and they are integrated. The outer side of the deformation ring (431) is connected to the inner side of the outer ring body (45) and they are integrated.

6. A fire stopping construction for a steel structure according to claim 5, wherein The longitudinal section of the deformation ring (431) is any one or more of the following shapes: V-shaped, U-shaped, S-shaped, or Z-shaped.

7. A fire stopping construction for a steel structure according to claim 5, wherein The outer ring body (45) includes at least two outer arc-shaped rings (451) distributed along the circumferential direction, and the ends of two adjacent outer arc-shaped rings (451) are welded together; The deformation ring (431) includes at least two deformation arc rings (432) distributed along the circumferential direction, and adjacent ends of two adjacent deformation arc rings (432) are welded together; The inner ring body (44) includes at least two inner arc-shaped rings (442) distributed along the circumferential direction, and the adjacent ends of two adjacent inner arc-shaped rings (442) are welded together; The number of outer arc ring (451), deformable arc ring (432) and inner arc ring (442) are equal and correspond one-to-one. The inner side of the outer arc ring (451) is connected to the outer side of the deformable arc ring (432), and the inner side of the deformable arc ring (432) is connected to the outer side of the inner arc ring (442).

8. A fire stopping construction for a steel structure according to claim 5, wherein Fire retardant coating (6) is provided between the cable (3) and the fireproof sealing ring (41) of the floor slab and the fireproof sealing ring (42) of the steel beam. Fire retardant coating (6) is provided between the fireproof sealing ring (41) of the floor slab and the floor slab (1) and between the fireproof sealing ring (42) of the steel beam and the steel beam (2). The fire retardant coating (6) covers the outer surface of the fireproof sealing ring (41) of the floor slab and the fireproof sealing ring (42) of the steel beam.

9. A fire stopping construction for a steel structure according to claim 8, wherein An annular outer plate (46) is provided between the floor cable perforation (11) and the steel beam cable perforation (21). The upper and lower ends of the outer plate (46) are connected to the floor (1) and the steel beam (2) respectively. An annular fireproof rock wool layer (47) is provided between the outer plate (46), the floor fireproof sealing ring (41), the cable (3) and the steel beam fireproof sealing ring (42).

10. A fire stopping construction of a steel structure according to claim 1 or 2 or 3 or 4, characterized in that, The central axis of the cable (3) is inclined to the floor slab and the steel beam, and the floor slab and the steel beam are parallel; the cable through hole (11) in the floor slab and the cable through hole (21) in the steel beam are both oblique holes and their central axes are concentric with the central axis of the cable (3).

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