Prefabricated fireproof partition wall for stair

Abstract

The utility model discloses an assembled stair fireproof partition wall relates to the field of fireproof partition wall, in view of the problem that the present stair fireproof partition wall is inconvenient construction, utilize the embedded part connection of main keel and stair step, stair board, replace the wall body thickness of traditional masonry structure fireproof partition wall because of the high requirement of fire resistance limit, load is big, influences stair structure safety. Through embedded part and fastener will skeleton unit quick fixed in stair structure, need not on -the -spot pouring or masonry, long round hole makes when installing can fine -tune, solves the size deviation problem that stair cast -in -situ structure can exist, improves the field adaptability, and the complete system is formed to skeleton and fireproof component, and rock wool fills no interstice, and the fireproof plate is sealed closely, and the fastener connection ensures the structural integrity, and the fire resistance limit satisfies the specification requirement.

Description

Technical Field

[0001] This utility model relates to the field of fireproof partitions, and in particular to a prefabricated fireproof partition for staircases. Background Technology

[0002] Fire-resistant partition walls in stairwells are crucial structures in buildings used to divide fire compartments and prevent the spread of fire. Their core function is to limit the spread of smoke and fire during a fire. In the construction industry, these walls are mostly treated as masonry or panel walls from design to construction, as long as they meet the fire resistance rating or fire resistance time requirements. They are not shown as cast-in-place concrete structures on design drawings, nor are they considered for casting during construction. Masonry or panel wall installation only occurs after the cast-in-place structures, including stairwells, are completed.

[0003] However, on-site masonry construction has a long construction period, and the high fire resistance requirements of masonry fire-resistant partitions result in thick walls and heavy loads, affecting the safety of the staircase structure. Using precast panel walls not only presents the problems of thick walls and heavy loads, but also requires the lower end of the wall to be pre-fabricated into a jagged shape to fit the stair steps, making prefabrication difficult. Some existing technologies use non-load-bearing reinforced concrete structures for the fire-resistant partitions between two staircases, so that they are represented as cast-in-place structures on the building design drawings. During construction, this is done concurrently with the cast-in-place structural work, eliminating the need for post-cast masonry or panel wall installation. However, the location of the fire-resistant partitions at the staircases makes proper support difficult, especially for factory-prefabricated staircases. This increases the difficulty of formwork construction and pouring during building construction, making the process cumbersome and failing to meet the efficiency requirements of on-site construction. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a prefabricated fireproof partition wall for staircases. It utilizes the pre-embedded parts of the main keel to connect with the stair treads and stair slabs, replacing the formwork support of traditional cast-in-place structures. This avoids the support difficulties caused by narrow staircase locations. The frame units are quickly fixed to the staircase structure through pre-embedded parts and fasteners, eliminating the need for on-site pouring or masonry. The use of fireproof components to combine the frame reduces the thickness of the fireproof partition wall, reduces its self-weight to achieve lightweighting, and reduces the load on the staircase structure.

[0005] To achieve the above objectives, the following technical solution is adopted:

[0006] A prefabricated fireproof partition wall for staircases, comprising:

[0007] The frame includes main keel and secondary keel. The bottom end of the main keel is fixed to the first embedded part located on the stair tread. The top end is provided with a connecting plate. The connecting plate has a first elongated hole. The connecting plate is connected to the second embedded part located at the bottom of the stair tread through the first elongated hole and fastener. Multiple main keels are arranged sequentially along the distribution direction of the stair. Secondary keels are connected between adjacent main keels. A filling area is formed between adjacent main keels and adjacent secondary keels.

[0008] Fireproof components include fireproof rock wool and fireproof boards. The fireproof rock wool is filled in the filling area, and the fireproof boards cover both sides of the frame to seal the filling area, so that the filling area forms a filling cavity to accommodate the fireproof rock wool.

[0009] Furthermore, the first embedded component includes a base plate and embedded anchor bars, with multiple embedded anchor bars connected to the bottom surface of the base plate and multiple embedded anchor bars connected to the top surface anchor bars of the top plate, and the main keel fixedly connected to the top surface of the base plate.

[0010] Furthermore, the second embedded component includes a top plate, embedded anchor bars, and perforated ear plates. The top plate is distributed parallel to the bottom surface of the stair slab. Multiple embedded anchor bars are connected to the top surface of the top plate, and the perforated ear plates are connected to the bottom surface of the top plate. The perforated ear plates are connected to the connecting plate, and the embedded anchor bars are embedded in the bottom surface of the stair slab.

[0011] Furthermore, the perforated ear plate has a second elongated hole, and the first elongated hole and the second elongated hole are connected by fasteners.

[0012] Furthermore, the main keel is a rectangular tube, and the top of the main keel is sealed by a sealing plate, with a connecting plate installed on the sealing plate.

[0013] Furthermore, the secondary keel is a C-shaped steel, and both ends of the secondary keel are fixed to the main keel by fasteners.

[0014] Furthermore, the webs at both ends of the secondary keel extend outward and bend to form a butt plate. The butt plate is connected to the main keel by a fastener so that the secondary keel is fixed to the main keel.

[0015] Furthermore, the fireproof board is distributed in accordance with the main keel, and the fireproof board is fixed to the frame by anchors.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] To address the current inconvenience of constructing fireproof partitions for staircases, this invention utilizes pre-embedded components connecting the main keel to the stair treads and slabs, replacing the formwork support of traditional cast-in-place structures. This avoids the support difficulties caused by narrow staircase locations. The frame units are quickly fixed to the staircase structure using pre-embedded components and fasteners, eliminating the need for on-site pouring or masonry. The use of fireproof components to combine the frame reduces the thickness of the fireproof partition, lowers its self-weight for lightweighting, and reduces the load on the staircase structure. The elongated holes allow for fine-tuning during installation, resolving potential dimensional deviations in cast-in-place staircase structures and improving on-site adaptability. The frame and fireproof components form a complete system, with seamless rock wool filling and a tightly sealed fireproof board. Fastener connections ensure structural integrity, and the fire resistance rating meets regulatory requirements.

[0018] The frame and staircase structure are connected by embedded parts to form a stable hinged connection system; the keel grid provides supporting rigidity, ensuring the integrity of the wall under high temperatures in a fire; fireproof rock wool and fireproof board form a heat insulation and sealing layer to prevent the spread of heat and smoke. The synergistic effect of each part not only achieves the high efficiency of prefabricated construction, but also solves the problems of high construction difficulty and unstable fire resistance performance in traditional solutions through structural optimization, ultimately meeting the requirements of building fire protection codes for fireproof partitions in stairwells. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the prefabricated fireproof partition wall for stairs in an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the first embedded part connecting to the main keel in an embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram of the second embedded part connecting to the main keel in an embodiment of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection between the main keel and the secondary keel in an embodiment of this utility model.

[0023] Figure 5 This is a schematic diagram of the first embedded part in an embodiment of this utility model.

[0024] Labeling instructions (in order of first appearance): 1. Main keel; 2. Secondary keel; 3. Fireproof component; 4. First embedded part; 5. Second embedded part; 6. Staircase; 7. Top plate; 8. Perforated ear plate; 9. Second oblong hole; 10. First oblong hole; 11. Connecting plate; 12. Butt plate; 13. Embedded anchor bar; 14. Base plate. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0026] Existing technologies suffer from low construction efficiency when constructing fire-resistant partition walls for staircases (6). On-site masonry requires waiting for mortar to solidify, resulting in a long construction period. Cast-in-place concrete structures are cumbersome due to their thin walls, difficulty in supporting the staircase (6) location, and complex formwork and pouring processes. Prefabrication is also challenging; prefabricated panels must fit snugly against the staircase (6) steps, requiring complex fabrication and high precision during on-site installation. Therefore, this embodiment provides a prefabricated fire-resistant partition wall for staircases. Through structural optimization, it achieves efficient prefabrication construction of the fire-resistant partition wall for staircases (6), while ensuring its fire resistance and structural stability, thus solving the problems of long construction periods, difficult prefabrication, and complex support in existing technologies.

[0027] like Figure 1 As shown, a prefabricated fireproof partition wall for stairs includes a frame and fireproof components 3. The frame serves as the core support structure and includes a main keel 1 and a secondary keel 2.

[0028] like Figure 1 As shown, the bottom end of the main keel 1 is fixed to the tread of the stair 6 via the first embedded part 4, and the top end is provided with a connecting plate 11. The connecting plate 11 has a first elongated hole 10, which is connected to the second embedded part 5 at the bottom of the stair 6 via fasteners. This forms a vertical support system, and the embedded parts achieve a rigid connection with the stair 6 structure, ensuring the overall stability of the wall. The elongated hole structure allows for fine-tuning of the position during installation to accommodate construction errors.

[0029] like Figure 4 As shown, the secondary keel 2 is horizontally connected to the adjacent main keel 1, forming a grid-like filling area with the main keel 1, dividing the skeleton space, providing an installation frame for the fireproof rock wool, and enhancing the lateral rigidity of the skeleton.

[0030] Fireproof component 3 includes fireproof rock wool and fireproof boards. The fireproof rock wool is filled in the filling area of ​​the frame to form a continuous fireproof layer. Utilizing the non-combustible and heat-insulating properties of rock wool, the fire resistance limit requirements of the wall are met. The fireproof boards cover both sides of the frame, sealing the filling area to form a filling cavity, protecting the rock wool from moisture or scattering, and simultaneously forming a complete fire-resistant structure with the frame, blocking smoke and fire.

[0031] like Figure 2 , Figure 3 As shown, the main keel 1 is connected to the stair treads and stair slabs 6 via embedded parts, replacing the traditional masonry or cast-in-place support method. The elongated holes on the connecting plate 11 allow the connecting plate 11 to adapt to the position of the second embedded part 5, accommodate the error of the second embedded part 5, facilitate the alignment of the embedded parts during on-site installation, and reduce the installation accuracy requirements.

[0032] The framework (main keel 1 and secondary keel 2) is welded in the factory, and the embedded parts are precisely installed according to the design positions. The fireproof board is assembled with the framework on site. After installing the fireproof board on one side, fireproof rock wool is filled, and then the other side is covered with the fireproof board. The factory prefabrication has high precision, avoiding the cumbersome procedures of on-site masonry or formwork, and reducing construction errors. The embedded parts of the main keel 1 are used to connect with the stair treads and slabs of stair 6, replacing the formwork support of traditional cast-in-place structures, avoiding the support difficulties caused by thin walls and narrow spaces in stair 6. The elongated hole design allows for fine-tuning during installation, solving the dimensional deviation problems that may exist in the cast-in-place structure of stair 6, and improving on-site adaptability.

[0033] The frame and fireproof components form a complete fireproof system. The rock wool filling is seamless, the fireproof board is tightly sealed, and the connection with fasteners ensures the integrity of the structure. The fire resistance limit meets the requirements of the specifications.

[0034] like Figure 1 , Figure 5 As shown, the first embedded part 4 includes a base plate 14 and embedded anchor bars 13. Multiple embedded anchor bars 13 are connected to the base plate 14 via through-hole plug welding. The embedded anchor bars 13 are embedded within the treads of the staircase 6, and the main keel 1 is fixedly connected to the top surface of the base plate 14. Specifically, the anchor bars are embedded in the concrete of the staircase 6 treads, forming a unified structure with the treads through mechanical anchoring force. The main keel 1 is fixed to the top surface of the base plate 14. The bond force between the anchor bars and the concrete transfers the wall load, avoiding the weak points of traditional masonry walls that rely on mortar bonding, ensuring the stability of the wall base and resisting horizontal thrust (such as the impact of hot air currents during a fire).

[0035] The second embedded component 5 includes a top plate 7, embedded anchor bars 13, and a perforated ear plate 8. The top plate 7 is parallel to the bottom surface of the stair slab 6. Multiple embedded anchor bars 13 are connected to the top surface of the top plate 7. Holes are drilled in the top plate 7, and the embedded anchor bars 13 are connected to the drilled holes in the top plate 7 by plug welding. The perforated ear plate 8 is connected to the bottom surface of the top plate 7 and is connected to the connecting plate 11. The embedded anchor bars 13 are embedded in the bottom surface of the stair slab 6. The top plate 7, the embedded anchor bars 13, and the perforated ear plate 8 are combined, and the embedded anchor bars 13 are embedded in the stair slab 6. The perforated ear plate 8 is connected to the connecting plate 11 of the main keel 1 through an elongated hole. The connecting plate 11 has a first elongated hole 10, and the perforated ear plate 8 has a second elongated hole 9. The first elongated hole 10 and the second elongated hole 9 are connected by fasteners to form a hinged connection, and can also be locked by fasteners. The frame and staircase 6 structure are connected by embedded parts to form a stable hinged connection system. The keel grid provides support rigidity and ensures the integrity of the wall under high temperature in a fire.

[0036] like Figure 3As shown, the anchor bar provides vertical support. The elongated hole design allows for a certain deviation between the installation position of the main keel 1 and the position of the second embedded part 5. Alternatively, the elongated hole can be set as a horizontal elongated hole to accommodate the horizontal adjustment of the top of the main keel 1, adapting to dimensional deviations in the cast-in-place structure of the staircase 6. Simultaneously, an adjustable rigid connection is formed through fasteners. When bolts are used as fasteners, a rigid connection can be achieved by tightening the bolts, or an adjustable connection can be achieved by loosening the bolts. This ensures that the top of the wall and the staircase 6 slab share the load, preventing joint cracking and smoke leakage due to inconsistent deformation.

[0037] The main keel 1 is composed of rectangular tubes and end plates. The rectangular tubes have excellent mechanical properties and can effectively resist lateral pressure. The end plate at the top seals the cavity to prevent debris from entering and provides a flat mounting surface for the connecting plate 11. The high bending stiffness of the rectangular tubes ensures that the keel is not easily deformed under the high temperature of a fire. The secondary keel 2 is made of C-shaped steel. C-shaped steel is lightweight and has a certain lateral stiffness. The webs at both ends of the secondary keel 2 extend outward and bend to form the butt plate 12. The butt plate 12 is connected to the main keel 1 by fasteners to fix the secondary keel 2 to the main keel 1.

[0038] C-shaped steel achieves lateral support with relatively low self-weight, reducing the overall weight of the wall; the butt plate 12 increases the connection contact area, disperses stress concentration, avoids local damage, and simplifies on-site installation steps, improving assembly efficiency.

[0039] Fireproof boards tightly cover both sides of the frame, forming a complete and sealed filling cavity to wrap the rock wool. The close fit reduces air gaps, avoids heat convection channels, and ensures the maximum thermal insulation performance of the rock wool. At the same time, the fireproof boards serve as a protective layer to prevent the rock wool from getting damp and falling off, maintaining its long-term fire resistance.

[0040] The fireproof board is reliably connected to the frame using anchors, and the spacing of the anchors must meet the specifications. Anchors provide mechanical anchoring force to prevent the fireproof board from falling off due to thermal expansion or smoke impact under high temperatures during a fire, ensuring the wall's airtightness. Evenly distributed anchors also disperse stress on the board surface, preventing localized deformation and cracking. Anchors can be rivets, dovetail screws, etc.

[0041] The prefabricated fireproof partition wall for the staircase rigidly connects the frame to the staircase structure through embedded parts, forming a stable mechanical system. The keel grid provides supporting rigidity, ensuring the integrity of the wall under high temperatures during a fire. Fireproof rock wool and fireproof boards form a heat insulation and sealing layer, preventing the spread of heat and smoke. The synergistic effect of each component not only achieves the high efficiency of prefabricated construction but also solves the problems of high construction difficulty and unstable fire resistance performance in traditional solutions through structural optimization, ultimately meeting the requirements of building fire protection codes for fireproof partition walls in staircases.

[0042] In this embodiment, a fireproof partition wall is constructed using a keel mesh and fireproof components 3, reducing the self-weight of the fireproof partition wall and ensuring the structural safety of the staircase 6. A Class I fire resistance rating requires a fire resistance limit of 4 hours. Ordinary masonry structures need to be very thick to meet this requirement. In this embodiment, fireproof rock wool and fireproof boards made of composite materials are used. Both the fireproof boards and fireproof rock wool can meet the Class I fire resistance rating requirement, making them suitable for factory-prefabricated staircases 6.

[0043] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.

Claims

1. A prefabricated fireproof partition wall for staircases, characterized in that, include: The frame includes main keel and secondary keel. The bottom end of the main keel is fixed to the first embedded part located on the stair tread. The top end is provided with a connecting plate. The connecting plate has a first elongated hole. The connecting plate is connected to the second embedded part located at the bottom of the stair tread through the first elongated hole and fastener. Multiple main keels are arranged sequentially along the distribution direction of the stair. Secondary keels are connected between adjacent main keels. A filling area is formed between adjacent main keels and adjacent secondary keels. Fireproof components include fireproof rock wool and fireproof boards. The fireproof rock wool is filled in the filling area, and the fireproof boards cover both sides of the frame to seal the filling area, so that the filling area forms a filling cavity to accommodate the fireproof rock wool.

2. The prefabricated fireproof partition wall for staircases as described in claim 1, characterized in that, The first embedded component includes a base plate and embedded anchor bars. Multiple embedded anchor bars are connected to the base plate by through-hole plug welding. The embedded anchor bars are embedded in the stair treads. The main keel is fixedly connected to the top surface of the base plate.

3. The prefabricated fireproof partition wall for staircases as described in claim 1 or 2, characterized in that, The second embedded component includes a top plate, embedded anchor bars, and perforated ear plates. The top plate is distributed parallel to the bottom surface of the stair slab. Multiple embedded anchor bars are connected to the top surface of the top plate, and the perforated ear plates are connected to the bottom surface of the top plate. The perforated ear plates are connected to the connecting plate, and the embedded anchor bars are embedded in the bottom surface of the stair slab.

4. The prefabricated fireproof partition wall for staircases as described in claim 3, characterized in that, The perforated ear plate has a second elongated hole, and the first elongated hole and the second elongated hole are connected by fasteners.

5. The prefabricated fireproof partition wall for staircases as described in claim 1, characterized in that, The main keel is a rectangular tube, and the top of the main keel is sealed by a sealing plate, with a connecting plate installed on the sealing plate.

6. The prefabricated fireproof partition wall for staircases as described in claim 1, characterized in that, The secondary keel is a C-shaped steel, and both ends of the secondary keel are fixed to the main keel by fasteners.

7. The prefabricated fireproof partition wall for staircases as described in claim 6, characterized in that, The web plates at both ends of the secondary keel extend outward and bend to form a butt plate. The butt plate is connected to the main keel by a fastener so that the secondary keel is fixed to the main keel.

8. The prefabricated fireproof partition wall for staircases as described in claim 1, characterized in that, The fireproof board is distributed in close contact with the main keel and is fixed to the frame by anchors.

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