A fire exhaust duct structure for underground garages in building construction

Abstract

This utility model discloses a fire exhaust duct structure for an underground garage in a building construction project, including a ventilation duct I, a ventilation duct II, a hoisting frame, and a tightening mechanism. Ventilation duct I and ventilation duct II are staggered, with the ends of ventilation duct I and ventilation duct II connected. Several hoisting frames are provided, with their bottoms connected to ventilation duct I and ventilation duct II respectively, and their tops fixedly connected to the roof slab of the underground garage. Several sets of tightening mechanisms are provided, symmetrically fixedly connected to both sides of the end of ventilation duct II, with one end of each tightening mechanism connected to ventilation duct I. This utility model, through the cooperation of ventilation duct I, ventilation duct II, and the tightening mechanism, achieves rapid installation and reliable sealing of the device, while also improving installation efficiency and maintenance convenience through cooperation with the hoisting frame.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection technology, and specifically relates to a fire smoke exhaust duct structure for underground garages in building engineering. Background Technology

[0002] Underground parking garages typically feature a large open design and are mostly surrounded by soil or building structures, with only a few entrances and ventilation shafts. In the event of a fire, smoke cannot escape from the underground garage and will quickly spread and accumulate in the ceiling, forming a "smoke pool." This not only affects the evacuation of people inside the underground garage but also hinders the rescue work of firefighters. Therefore, a fire exhaust duct structure for underground parking garages is needed to quickly remove smoke from the underground garage.

[0003] A search revealed a fire-fighting smoke exhaust duct with technical announcement number CN223295002U. This device uses a fan to draw smoke into the ventilation duct through multiple air inlets on a second ventilation duct. The smoke is then discharged after passing through an annular filter screen. Simultaneously, a brush roller and a cleaning brush work together to continuously clean the filter screen, achieving automatic cleaning. To ensure immediate activation in case of fire, this device requires regular maintenance and inspection, including checking the motor, replacing worn brushes and filters, and cleaning accumulated dust. However, since its components are integrated within the insulation ring cavity, disassembly and maintenance are relatively cumbersome.

[0004] A search revealed a modular smoke exhaust duct structure for fire protection engineering, with existing technology announcement number CN222811429U. This device uses a negative pressure fan to discharge smoke from the duct towards an interception net, which filters out solid particles and other debris from the smoke. Simultaneously, a servo motor drives a screw to control a threaded block, which in turn drives two sets of scrapers to scrape the dust and impurities adhering to the surface of the interception net and drop them into the bottom groove. While this device improves stability by connecting multiple components such as combined steel profiles, limiting steel, and ring clamps, the installation and disassembly process is cumbersome, requiring precise alignment of slots and pre-drilled screw holes. This not only increases construction difficulty and time costs but also delays emergency repairs or pipe replacements, failing to meet the rapid response requirements of fire protection facilities.

[0005] Therefore, a fire exhaust duct structure for underground garages in building construction is needed that can reduce construction difficulty, save installation and maintenance time, and ensure that the device has robust and durable sealing performance. Summary of the Invention

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a fire exhaust duct structure for underground garages in building engineering. This utility model achieves rapid installation and reliable sealing of the device by cooperating with ventilation pipe I, ventilation pipe II and tightening mechanism. At the same time, it improves installation efficiency and maintenance convenience by cooperating with the hoisting frame.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A fire exhaust duct structure for an underground garage in a building project includes a ventilation duct I, a ventilation duct II, a hoisting frame, and a tightening mechanism; the ventilation duct I and ventilation duct II are arranged alternately, and the ends of ventilation duct I and ventilation duct II are connected; several hoisting frames are provided, and the bottoms of the several hoisting frames are respectively connected to ventilation duct I and ventilation duct II, and the tops are fixedly connected to the roof slab of the underground garage; several sets of tightening mechanisms are provided, which are symmetrically fixedly connected to both sides of the end of ventilation duct II, and one end of the tightening mechanism is connected to ventilation duct I;

[0009] The ventilation duct I is provided with an air inlet and a connecting rod; the air inlets are symmetrically arranged on both sides of the ventilation duct I, and sealing gaskets are provided on the flanges at both ends of the ventilation duct I; several connecting rods are provided, which are symmetrically fixedly connected to both sides of the ventilation duct I.

[0010] The ventilation pipe II has slots at both ends, and sealing gaskets are provided inside the slots.

[0011] The hoisting frame includes a connecting plate I, a connecting groove, and a hoisting rod; the hoisting rod is provided in pairs, and the top of the hoisting rod is fixedly connected to the top plate of the underground garage, and the bottom end is threaded; the top of the connecting groove is aligned with the connecting plate I, and the two ends of the connecting plate I and the connecting groove are fixedly connected to the bottom ends of the pair of hoisting rods by several nuts respectively, and the ventilation pipe I or ventilation pipe II is fixedly connected between the connecting plate I and the connecting groove.

[0012] The tightening mechanism includes a connecting box, a pull rod, a lever, a dial wheel, a rotating seat, a pressure rod, a guide rod, a connecting plate II, and a bolt I. One side of the connecting box is fixedly connected to the ventilation pipe II and the slot. One end of the pull rod is slidably connected to the connecting box, and several levers are provided on the inner side of the pull rod. The bottom of the dial wheel passes through the through slot above the connecting box and engages with the lever. One side of the dial wheel is rotatably connected to the connecting seat on one side of the connecting box via a connecting shaft, and the other side is fixedly connected to the rotating seat via a connecting shaft passing through the through hole on the connecting seat on the other side of the connecting box. The pressure rod is located on one side of the dial wheel, and both ends of the pressure rod are fixedly connected to the connecting plate II via guide rods passing through the through hole on the connecting box. The bolt I is threadedly connected to the connecting plate II.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1) The tightening mechanism can effectively tighten adjacent ventilation pipes I and II, ensuring a tight connection at the joint, significantly enhancing the sealing performance and preventing smoke and air leakage; the tightening mechanism also has a self-locking anti-loosening function, which uses a pressure rod to press the dial wheel to prevent loosening due to vibration and ensure the long-term stable operation of the pipeline.

[0015] 2) The elevation and level of ventilation pipe I and ventilation pipe II can be flexibly adjusted by the nuts on the hoisting frame, which simplifies the installation process and reduces the difficulty of alignment. Moreover, during maintenance, there is no need to disassemble the entire system. Simply open the tightening mechanism and loosen a single hoisting frame to disassemble and repair a single section of ventilation pipe I or ventilation pipe II. This greatly facilitates the repair and replacement of specific pipe sections or connections, significantly shortens maintenance time, and improves the maintainability of the system. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of a fire exhaust duct structure for an underground garage in a building project, according to this utility model.

[0017] Appendix Figure 2 It is attached Figure 1 Schematic diagram of the structure of central ventilation duct I;

[0018] Appendix Figure 3 It is attached Figure 1 Schematic diagram of the structure of central ventilation duct II;

[0019] Appendix Figure 4 It is attached Figure 1 Schematic diagram of the connection structure between the tightening mechanism and ventilation duct I and ventilation duct II;

[0020] Appendix Figure 5 It is attached Figure 1 Schematic diagram of the tightening mechanism;

[0021] Appendix Figure 6 It is attached Figure 1 A cross-sectional schematic diagram of the tightening mechanism;

[0022] In the diagram: 1. Ventilation duct I; 101. Air inlet; 102. Connecting rod; 2. Ventilation duct II; 201. Slot; 3. Lifting frame; 301. Connecting plate I; 302. Connecting groove; 303. Hanging rod; 4. Tightening mechanism; 401. Connecting box; 402. Pull rod; 4021. Pulley; 403. Pulley wheel; 4031. Rotating seat; 404. Pressure rod; 4041. Guide rod; 4042. Connecting plate II; 4043. Bolt I. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-6 The technical solution of this utility model will be further described in detail below.

[0024] A fire exhaust duct structure for an underground garage in a building project includes a ventilation duct I1, a ventilation duct II2, a hoisting frame 3, and a tightening mechanism 4. The ventilation duct I1 and ventilation duct II2 are arranged alternately, and the ends of ventilation duct I1 and ventilation duct II2 are connected. Several hoisting frames 3 are provided, and the bottoms of several hoisting frames 3 are respectively connected to ventilation duct I1 and ventilation duct II2, and the tops are fixedly connected to the roof of the underground garage. Several sets of tightening mechanisms 4 are provided, which are symmetrically fixedly connected to both sides of the end of ventilation duct II2, and one end of the tightening mechanism 4 is connected to ventilation duct I1.

[0025] The ventilation duct I1 is provided with an air inlet 101 and a connecting rod 102; the air inlets 101 are symmetrically arranged on both sides of the ventilation duct I1, and sealing gaskets are provided on the flanges at both ends of the ventilation duct I1; several connecting rods 102 are provided, which are symmetrically fixedly connected to both sides of the ventilation duct I1.

[0026] The ventilation pipe II2 is provided with slots 201 at both ends, and a sealing gasket is provided inside the slots 201.

[0027] The hoisting frame 3 includes a connecting plate I 301, a connecting groove 302, and a hanging rod 303; the hanging rod 303 is provided in pairs, and the top of the hanging rod 303 is fixedly connected to the top plate of the underground garage, and the bottom is threaded; the top of the connecting groove 302 is aligned with the connecting plate I 301, and the two ends of the connecting plate I 301 and the connecting groove 302 are fixedly connected to the bottom of the pair of hanging rods 303 by several nuts respectively, and the ventilation pipe I 1 or the ventilation pipe II 2 is fixedly connected between the connecting plate I 301 and the connecting groove 302.

[0028] The tightening mechanism 4 includes a connecting box 401, a pull rod 402, a lever 4021, a dial wheel 403, a rotating seat 4031, a pressure rod 404, a guide rod 4041, a connecting plate II 4042, and a bolt I 4043. One side of the connecting box 401 is fixedly connected to the ventilation pipe II 2 and the slot 201. One end of the pull rod 402 is slidably connected to the connecting box 401, and several levers 4021 are provided on the inner side of the pull rod 402. The bottom of the dial wheel 403 passes through the passage above the connecting box 401. The slot engages with the dial block 4021. One side of the dial wheel 403 is rotatably connected to the connecting seat on one side of the connecting box 401 via a connecting shaft, and the other side is fixedly connected to the rotating seat 4031 via a connecting shaft through a through hole on the connecting seat on the other side of the connecting box 401. The pressure rod 404 is located on one side of the dial wheel 403. Both ends of the pressure rod 404 are fixedly connected to the connecting plate II 4042 via guide rods 4041 through through holes on the connecting box 401, and bolt I 4043 is threadedly connected to the connecting plate II 4042.

[0029] A fire exhaust duct structure for an underground parking garage in a building project, the working process of which is as follows:

[0030] According to the design drawings, fix the lifting rods 303 in the hoisting frame 3 to the predetermined position on the roof of the underground garage, and install a nut on all the lifting rods 303; since ventilation pipe I1 and ventilation pipe II2 need to be connected in an alternating manner, it is necessary to reserve the position of ventilation pipe II2 before installing ventilation pipe I1;

[0031] First, hoist the ventilation pipe I1 to the bottom of the corresponding pair of lifting rods 303, and install the connecting plate I301 above the ventilation pipe I1. Install the connecting groove 302 from below the ventilation pipe I1 on the outside of the ventilation pipe I1, and control the top of the connecting groove 302 to align with the connecting plate I301. Then, adjust the positions of the connecting plate I301, the connecting groove 302 and the ventilation pipe I1 so that the through holes at both ends of the connecting plate I301 and the connecting groove 302 are aligned with the pair of lifting rods 303. Control the ventilation pipe I1 to rise until the bottom of the pair of lifting rods 303 passes through the through holes at both ends of the connecting plate I301 and the connecting groove 302. Then, install a nut on each of the pair of lifting rods 303. Finally, adjust the ventilation pipe I1 by controlling the position of the nut on the lifting rod 303 so that its level and elevation meet the requirements. Then, tighten the nut on the lifting rod 303 to lock the connecting plate I301 and the connecting groove 302, thereby firmly clamping the ventilation pipe I1 in the hoisting frame 3.

[0032] Hoist ventilation duct II2 between two adjacent sets of ventilation ducts I1. Then, install connecting plate I301 above ventilation duct II2. Install connecting groove 302 from below ventilation duct II2 on the outside of ventilation duct II2, and align the top of connecting groove 302 with connecting plate I301. Then, adjust the positions of connecting plate I301, connecting groove 302, and ventilation duct II2 so that the retaining groove 201 at the end of ventilation duct II2 is aligned with the flanges at the ends of the two sets of ventilation ducts I1. At the same time, align the through holes at both ends of connecting plate I301 and connecting groove 302 with a pair of lifting rods 303. Then, control ventilation duct II2 to rise so that the flanges at the ends of ventilation duct I1... Insert the ventilation pipe II2 into the slot 201 at the end of the pipe, and simultaneously allow the bottom of a pair of hangers 303 to pass through the through holes at both ends of the connecting plate I 301 and the connecting groove 302. Then, install a nut on each of the hangers 303. Finally, adjust the ventilation pipe II2 by controlling the position of the nuts on the hangers 303 to align the ventilation pipe II2 with the ventilation pipe I1, ensuring that the sealing gasket in the slot 201 is in close contact with the sealing gasket on the flange of the ventilation pipe I1, forming a preliminary seal. Then, tighten the nuts on the hangers 303 to lock the connecting plate I 301 and the connecting groove 302, thereby firmly clamping the ventilation pipe II2 in the lifting frame 3.

[0033] Using tools to control the rotating seat 4031 in the tightening mechanism 4, the dial wheel 403 is driven to rotate, thereby causing the dial wheel 403 to control the pull rod 402 to move inside the connecting box 401; thus, the pull rod 402 cooperates with the connecting rod 102 to tighten the adjacent ventilation pipes I1 and II2, ensuring a tight connection between the ventilation pipes I1 and II2 and enhancing the sealing effect; finally, by adjusting the bolt I 4043, the guide rod 4041 is controlled to drive the pressure rod 404 to press against the dial wheel 403, which plays a self-locking and anti-loosening role, preventing the dial wheel 403 from reversing due to vibration or other reasons.

[0034] In the description of this utility model, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting. Movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the application effect needs to be selected according to the application of the solution. Washers are provided in the connection process of the above bolts, fixing bolts, studs and nuts. At the same time, the connection of the above bolts, fixing bolts, studs and nuts is fixed by thread locking.

[0035] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A construction engineering underground garage fire smoke exhaust duct structure, comprising a ventilation pipe I, a ventilation pipe II, a hoisting frame, a tightening mechanism; characterized in that The ventilation pipes I and II are arranged alternately, and the ends of ventilation pipes I and II are connected; several hoisting frames are provided, and the bottoms of the several hoisting frames are respectively connected to ventilation pipes I and II, and the tops are fixedly connected to the roof of the underground garage; several sets of tightening mechanisms are provided, which are symmetrically fixedly connected to both sides of the end of ventilation pipe II, and one end of the tightening mechanism is connected to ventilation pipe I. The ventilation duct I is provided with an air inlet and a connecting rod; the air inlets are symmetrically arranged on both sides of the ventilation duct I, and sealing gaskets are provided on the flanges at both ends of the ventilation duct I; several connecting rods are provided, which are symmetrically fixedly connected to both sides of the ventilation duct I. The ventilation pipe II has slots at both ends, and sealing gaskets are provided inside the slots.

2. A building engineering underground garage fire smoke exhaust duct structure according to claim 1, characterized in that The hoisting frame includes a connecting plate I, a connecting groove, and a hoisting rod; the hoisting rod is provided in pairs, and the top of the hoisting rod is fixedly connected to the top plate of the underground garage, and the bottom end is threaded; the top of the connecting groove is aligned with the connecting plate I, and the two ends of the connecting plate I and the connecting groove are fixedly connected to the bottom ends of the pair of hoisting rods by several nuts respectively, and the ventilation pipe I or ventilation pipe II is fixedly connected between the connecting plate I and the connecting groove.

3. The building engineering underground garage fire smoke exhaust duct structure according to claim 1, characterized in that The tightening mechanism includes a connecting box, a pull rod, a lever, a dial wheel, a rotating seat, a pressure rod, a guide rod, a connecting plate II, and a bolt I. One side of the connecting box is fixedly connected to the ventilation pipe II and the slot. One end of the pull rod is slidably connected to the connecting box, and several levers are provided on the inner side of the pull rod. The bottom of the dial wheel passes through the through slot above the connecting box and engages with the lever. One side of the dial wheel is rotatably connected to the connecting seat on one side of the connecting box via a connecting shaft, and the other side is fixedly connected to the rotating seat via a connecting shaft passing through the through hole on the connecting seat on the other side of the connecting box. The pressure rod is located on one side of the dial wheel, and both ends of the pressure rod are fixedly connected to the connecting plate II via guide rods passing through the through hole on the connecting box. The bolt I is threadedly connected to the connecting plate II.

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