A tunnel assembled fire wall for power distribution network

Abstract

The utility model relates to a power distribution network tunnel assembled fire resisting wall which belongs to the technical field of fire resisting wall, including support frame, wallboard and fire door, wherein the periphery of support frame is fixedly connected on the inner side wall of tunnel, and a pair of wallboards are fixedly connected on the front and back sides of support frame, and a pair of fire doors corresponding to front and back are embedded on the two wallboards, and the fire door is rotatably connected with wallboard, the utility model is more convenient and easy to install and transport, and has lower capacity increasing cost.

Description

Technical Field

[0001] This utility model belongs to the field of fire barrier technology, and in particular relates to an assembled fire barrier for power distribution network tunnels. Background Technology

[0002] In power distribution tunnels, the traditional method involves using concrete firewalls. However, these traditional firewalls have fixed through-hole sizes, making cable capacity upgrades difficult and prone to deformation when exposed to moisture. Furthermore, different types of concrete have varying temperature limits, generally ranging from 300℃ to 1200℃. Cable fires typically reach temperatures of 800℃ to 1000℃; ordinary concrete cannot withstand these temperatures, leading to cracking and collapse. Therefore, heat-resistant concrete must be used. To ensure structural stability and meet the requirements for preventing high-temperature conduction, traditional firewalls need sufficient thickness. However, in practice, power distribution tunnels contain numerous cables that require capacity upgrades every 1-2 years. When upgrading cables, traditional firewalls can only be constructed by destructively removing the existing wall panels and rebuilding the firewall. The original firewall materials are essentially unusable after removal, resulting in high maintenance costs and generating significant construction waste.

[0003] Traditional firewalls typically use fire-retardant putty to seal through-holes where cables pass through. However, fire-retardant putty has poor weather resistance and is prone to high-temperature flow during construction and use, making the area around the holes look old, messy, and unsightly. Traditional fire-retardant putty also contains halogens, which continuously corrode the cable insulation layer in non-fire conditions and form toxic fumes in fire conditions. Over time, traditional fire-retardant putty not only fails to effectively protect through-hole cables but also increases the difficulty of on-site response during a fire. Finally, the overall fire-resistant capability of fire-retardant putty is limited. Its high thermal conductivity and tendency to flow at high temperatures mean that even if it remains in good overall condition during a fire, it cannot effectively isolate high-temperature conduction and prevent the spread of fire for an extended period. Utility Model Content

[0004] The purpose of this utility model is to provide an assembled firewall for power distribution network tunnels, so as to solve the technical problems of traditional firewalls, such as difficulty in capacity expansion, poor weather resistance, and easy deformation when exposed to moisture.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A fire-resistant wall for power distribution tunnels includes a support frame, wall panels, and fire doors. The periphery of the support frame is fixedly connected to the inner wall of the tunnel. A pair of wall panels are fixedly connected on the front and rear sides of the support frame. A pair of fire doors corresponding to each other are embedded in the two wall panels. The fire doors are rotatably connected to the wall panels.

[0006] Furthermore, the support frame includes horizontal warp rods and vertical weft columns. Multiple warp rods and weft columns are intersected and fixedly connected together to form a crisscrossing grid-like support frame. The outer ends of the warp rods in the outer ring are fixedly connected to the sidewalls of the tunnel, the bottom ends of the weft columns are fixedly connected to the bottom surface of the tunnel, and the top ends are fixedly connected to the top surface of the tunnel. The support frame has door openings reserved at positions corresponding to fire doors. A pair of corresponding support frames running through each other form the support frame, and the wall panels are connected to the support frames on the corresponding sides.

[0007] Furthermore, the points where the longitudinal and vertical rods intersect are fixedly connected by connectors.

[0008] Furthermore, the shape of the wall panel corresponds to the tunnel, and it has corresponding holes at the fire door. The wall panel is made up of multiple fireproof panels spliced ​​together. Adjacent fireproof panels are closely arranged and sealed together. The fireproof panels are fixedly installed on the support frame on the corresponding side, and the cable passes through the corresponding fireproof panel.

[0009] Furthermore, a corresponding fireproof module is provided between the cable and the fireproof board. A pair of through holes corresponding to the fireproof module are provided on the wall panel. The fireproof module passes through the corresponding two through holes and wraps around the cable. Its inner ring is fixedly connected to the cable, and its outer ring is fixedly connected to the through holes.

[0010] Furthermore, the fireproof module is composed of multiple fireproof pads spliced ​​together. The multiple fireproof pads wrap around the perimeter of the corresponding cable, and the surfaces of the pads corresponding to the wall panels are fixedly pasted onto the corresponding fireproof boards. The splicing points of adjacent fireproof pads and their contact surfaces with the cables are sealed and fixedly connected.

[0011] This utility model of a modular fire barrier for power distribution network tunnels is simple to install and disassemble. Some parts can be directly reused after disassembly, while others only require simple on-site processing before reuse. The waste generated during each installation and disassembly is far less than that of traditional firewalls, resulting in lower capacity expansion costs. It uses fireproof boards and fireproof modules to seal holes, making it easy to cut. After installation, the surface can be trimmed flat, resulting in a neat and aesthetically pleasing appearance. It also prevents high-temperature flow and maintains its original state until the next disassembly, making it more robust and corrosion-resistant. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the internal structure of this utility model; Figure 2 This is a schematic diagram of the external structure of this utility model; Figure 3 This utility model Figure 2 A cross-sectional view along the AA direction; The markings in the diagram are as follows: 1. Support frame; 11. Support frame; 12. Warp rod; 13. Weft rod; 14. Connector; 2. Wall panel; 21. Fireproof board; 22. Fireproof module; 3. Fire door; 4. Tunnel; 5. Cable. Detailed Implementation

[0013] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of an assembled fire barrier for power distribution tunnels.

[0014] like Figure 1-3 As shown, the modular fire barrier for power distribution tunnels of this utility model includes a support frame 1, wall panels 2, and fire doors 3. The support frame 1 corresponds to the tunnel 4, and its perimeter is fixedly connected to the inner wall of the tunnel 4. A pair of wall panels 2 are provided on the front and rear sides of the support frame 1, and the two wall panels 2 are respectively fixedly connected to the corresponding sides of the support frame 1. A pair of fire doors 3 corresponding to the front and rear are embedded in the two wall panels 2. The fire doors 3 are rotatably connected to the wall panels 2. In this embodiment, the fire doors 3 are automatically closing fire doors 3. A fireproof sealing strip is provided between the fire doors 3 and the wall panels 2. When the fire doors 3 are opened, they are in an open state; when the fire doors 3 are closed, they are in a sealed closed state.

[0015] Furthermore, the support frame 1 includes horizontal warp rods 12 and vertical weft columns 13. The outer ends of the warp rods 12, which are located on the outer ring of the support frame 1, are fixedly connected to the side wall of the tunnel 4. The ends of the weft columns 13 are fixedly connected to the bottom or top surface of the tunnel 4. In this embodiment, the warp rods 12 are fixedly connected to the side wall of the tunnel 4 by external expansion bolts. Multiple warp rods 12 and weft columns 13 are fixedly connected together to form a crisscrossing grid-like support frame 11. The places where the warp rods 12 and the vertical columns intersect are fixedly connected by connectors 14. The support frame 11 has a door opening reserved at the position corresponding to the fire door 3. A pair of corresponding support frames 11 that run through the front and back form the support frame 1, which makes the support frame 1 stronger and has a better load-bearing capacity. The wall panel 2 is fixedly installed on the support frame 11 on the corresponding side. Taking the wall panel 2 on the front side of the support frame 1 as an example, it is fixedly installed on the front side of the support frame 11. When in use, the cable 5 passes through the grid at the corresponding height on the support frame 1.

[0016] Furthermore, the outer shape of the wall panel 2 corresponds to that of the tunnel 4, and a corresponding door hole is reserved at the fire door 3. The fire door 3 is installed at the door hole of the corresponding side wall panel 2. The wall panel 2 is spliced ​​together from multiple units of fireproof panels 21. In this embodiment, the unit division of the fireproof panels 21 corresponds to the grid distribution of the corresponding side support frame 11. Taking the front wall panel 2 as an example, each fireproof panel 21 is fixedly installed on the front side of the corresponding grid of the support frame 11. Adjacent fireproof panels 21 are closely arranged and sealed. The cable 5 passes through the fireproof panel 21 at the corresponding position of the wall panel 2, and the cable 5 is sealed and fixedly connected to the wall panel 2.

[0017] Furthermore, a corresponding fireproof module 22 is provided between the cable 5 and the fireproof board 21 for further sealing and fixing between them. The fireproof module 22 is composed of multiple fireproof pads spliced ​​together. In this embodiment, two fireproof pads are spliced ​​together, one upper and one lower. The two fireproof pads are respectively wrapped around the upper and lower sides of the corresponding cable 5. Their length is greater than the thickness between the two sides of the two wall panels 2 that are far apart. In this embodiment, the length of the fireproof pad is greater than the thickness between the front side of the front wall panel 2 of the support frame 1 and the rear side of the rear wall panel 2 of the support frame 1. In this embodiment, the side walls of the two fireproof pads are provided with semi-grooves corresponding to the cable 5. The semi-grooves of the two fireproof pads are spliced ​​together to form a through groove to accommodate the cable 5. The splicing point of the two fireproof pads and its... The contact surfaces with the cable 5 are all fixedly connected with fireproof sealant. The wall panel 2 is provided with a pair of through holes corresponding to the fireproof module 22. The fireproof module 22, which wraps the cable 5, is installed in the corresponding through holes of the wall panel 2. Its outer ring side is sealed and fixedly bonded to the corresponding fireproof board 21 on the wall panel 2 with fireproof sealant. In this embodiment, the transverse axial section of the fireproof module 22 is an inverted I-shaped structure. The sides of the protruding front and rear ends of the I-shaped structure near the wall panel 2 are fixedly pasted to the sides of the corresponding fireproof board 21 with corresponding fireproof sealant. The outer radial dimension of the middle horizontal bar of the I-shaped fireproof module 22 corresponds to the through hole on the wall panel 2. Its outer side wall is sealed and fixedly bonded to the through hole of the wall panel 2 with fireproof sealant.

[0018] Furthermore, the connection between the wall panel 2 and the tunnel 4 is filled with fire-resistant intumescent sealant, which is fireproof and smoke-proof, further improving the fire-resistant performance of the fire barrier and reducing the possibility of smoke and fire spreading and circulating through the gap between the wall panel 2 and the tunnel 4. The warp rods 12, weft columns 13 and connectors 14 that make up the support frame 1 can be made of stainless steel or hot-dip galvanized steel. In this embodiment, stainless steel is used, which makes the support frame 1 more corrosion resistant.

[0019] During operation, firstly, based on the dimensions of the power distribution tunnel 4 and the distribution of its cables 5, the grid size and arrangement of the support frame 1 are designed, and the corresponding dimensions and quantities of warp rods 12, weft posts 13, and connectors 14 are prepared and processed according to the design. Then, the prepared components are transported to the location in the tunnel 4 where the fire barrier needs to be installed. Next, the warp rods 12, weft posts 13, and connectors 14 are assembled according to the previous design and fixedly installed at the location in the tunnel 4 where the fire barrier needs to be installed, forming the support frame 1. Further, wall panels 2 are installed on the front and rear sides of the support frame 1. The wall panels 2 are all spliced ​​together by multiple fireproof boards 21. Finally, through holes are opened where cables 5 pass through, and fireproof modules 22 are installed. Fireproof doors 3 are installed at the doorways of the wall panels 2. Thus, the splicing and installation of the fire barrier is completed.

[0020] When the capacity of cable 5 needs to be increased later, it is only necessary to remove the fireproof boards 21 on both sides of the corresponding grid on the support frame 1 according to the route of the new cable 5. After the new cable 5 passes through the corresponding grid of the support frame 1, the corresponding fireproof boards 21 and fireproof modules 22 can be reinstalled on the front and back sides of the corresponding grid. The construction is convenient, quick, time-saving, and material-saving.

[0021] This utility model of a modular fire barrier for power distribution tunnels adopts a combined installation method. The component dimensions of each unit are controllable, making transportation more convenient. Its installation method is simple, construction is convenient, concise, and less time-consuming, resulting in higher construction efficiency. It also makes it easier to increase the capacity of power distribution cables 5 later without having to completely dismantle them, thus reducing expansion costs. Its support frame 1 adopts a combination of a double-layer steel structure and double-layer wall panels, making it more robust and providing better moisture and corrosion resistance.

[0022] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A modular fire barrier for power distribution network tunnels, characterized in that, It includes a support frame (1), wall panels (2) and fire doors (3). The periphery of the support frame (1) is fixedly connected to the inner wall of the tunnel (4). A pair of wall panels (2) are fixedly connected on the front and rear sides of the support frame (1). A pair of fire doors (3) corresponding to each other are installed on the two wall panels (2). The fire doors (3) and the wall panels (2) are rotatably connected.

2. The modular fire barrier for power distribution tunnels according to claim 1, characterized in that, The support frame (1) includes horizontal warp rods (12) and vertical weft columns (13). Multiple warp rods (12) and weft columns (13) are intersected and fixed together to form a crisscrossing grid-like support frame (11). The outer end of the outer ring of the support frame (1) is fixedly connected to the side wall of the tunnel (4). The support frame (11) has a door opening reserved at the position corresponding to the fire door (3). A pair of corresponding support frames (11) running through the front and back form the support frame (1). The wall panel (2) is connected to the support frame (11) on the corresponding side.

3. The modular fire barrier for power distribution tunnels according to claim 2, characterized in that, The longitudinal rod (12) and the vertical part that intersect each other are fixedly connected by a connector (14).

4. The modular fire barrier for power distribution tunnels according to claim 2, characterized in that, The shape of the wall panel (2) corresponds to that of the tunnel (4), and it has corresponding holes at the fire door (3). The wall panel (2) is made up of multiple fireproof panels (21) spliced ​​together. The adjacent fireproof panels (21) are closely arranged and sealed together. The fireproof panels (21) are fixedly installed on the support frame (11) on the corresponding side, and the cable (5) passes through the corresponding fireproof panel (21).

5. The modular fire barrier for power distribution tunnels according to claim 4, characterized in that, A corresponding fireproof module (22) is provided between the cable (5) and the fireproof board (21). A pair of through holes corresponding to the fireproof module (22) are provided on the wall panel (2). The fireproof module (22) passes through the corresponding two through holes and wraps around the cable (5). Its inner ring is fixedly connected to the cable (5), and its outer ring is fixedly connected to the through hole.

6. The modular fire barrier for power distribution tunnels according to claim 5, characterized in that, The fireproof module (22) is composed of multiple fireproof pads. The multiple fireproof pads are wrapped around the perimeter of the corresponding cable (5). The surfaces of the fireproof pads corresponding to the wall panel (2) are fixedly pasted onto the corresponding fireproof board (21). The joints of adjacent fireproof pads and their contact surfaces with the cable (5) are sealed and fixedly connected.

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