Fire-fighting ventilation duct connecting structure

Abstract

This utility model discloses a fire ventilation duct connection structure, relating to the field of ventilation equipment technology. Specifically, it is a fire ventilation duct connection structure, including a connecting pipe with flanges at both ends. Flanges are provided at the left and right ends of flanges, and flanges are provided at the left and right ends of flanges. The surfaces of flanges are provided with inner and outer annular semi-circular grooves. The annular semi-circular shape can absorb stress due to deformation compared to a flat structure, preventing structural breakage. Rubber rings are installed in the inner annular semi-circular groove and rubber rings are installed in the outer annular semi-circular groove. The rubber rings installed in the double annular grooves form an ultimate seal to prevent smoke leakage. There are exhaust pipes on both sides of the connecting pipe, and crossbeams are installed inside the exhaust pipes. Turbine fans are rotatably connected to the crossbeams. The turret fans can ventilate the connecting pipe and quickly disperse the airflow. In case of disaster, the turret fans are activated to increase the airflow velocity in the ventilation pipes and connecting pipes, so that the smoke can be quickly discharged, improving the ventilation and smoke exhaust efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically a fire ventilation duct connection structure. Background Technology

[0002] As cities become increasingly sophisticated, various residential communities, shopping malls, and office buildings all require fire ventilation ducts. These ducts need to be interconnected in sections, necessitating the use of connectors or connecting structures. Existing fire ventilation duct connection structures suffer from poor sealing, leading to smoke leakage at the joints and consequently reducing ventilation and smoke extraction efficiency. Furthermore, flat plate connections cannot absorb stress during disasters, making them prone to structural breakage. In addition, the smoke extraction efficiency of fire ventilation ducts during disasters is related to duct size and length; longer ducts generally result in better ventilation and smoke extraction. Existing fire ventilation duct connection structures cannot effectively enhance smoke extraction efficiency during disasters. Therefore, we propose a new fire ventilation duct connection structure. Utility Model Content

[0003] This utility model provides a fire ventilation duct connection structure, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A fire ventilation duct connection structure includes a connecting pipe with flanges at both ends. Flanges are positioned at the left and right ends of flanges and are in contact with each other. The surfaces of flanges one and two that contact each other have two annular semi-circular grooves, inner and outer, which match each other. A rubber ring is installed in the inner annular semi-circular groove, and a rubber ring is installed in the outer annular semi-circular groove. Exhaust pipes are symmetrically arranged on both sides of the connecting pipe, with their tops connected to the connecting pipe and their bottoms connected to the outside. A crossbeam is installed inside the exhaust pipe, and a turbine fan is rotatably connected to the upper surface of the crossbeam. Rotation of the turbine fan ventilates the connecting pipe and rapidly disperses the airflow.

[0006] Preferably, the flange two has through holes arranged in an array on both sides of the inner and outer annular semi-circular grooves, and bolts are threaded into the through holes, and the flange one and flange two are fastened by bolts.

[0007] Preferably, a ventilation pipe is installed at the other end of the flange.

[0008] Preferably, clamps are symmetrically installed on both sides of the connecting pipe and the exhaust pipe. The clamps are contoured to the shape of the connecting pipe and the exhaust pipe, and the clamps are connected by bolts with two threads.

[0009] Preferably, a groove is provided inside the side wall of the connecting pipe at the top connection port of the exhaust pipe, and a slider is slidably connected inside the groove. The slider can close or open the connection port between the exhaust pipe and the connecting pipe.

[0010] Preferably, a fixing block is installed on the outer surface of the slider, the fixing block is higher than the outer surface of the connecting tube, and a vertical groove is opened on the outer surface of the connecting tube at the fixing block. Moving the fixing block can make the slider move along the groove.

[0011] Preferably, a motor is installed at the bottom of the crossbeam, and the output shaft of the motor passes through the crossbeam and is fixedly connected to the turbofan.

[0012] This utility model has the following beneficial effects:

[0013] 1. The fire ventilation duct connection structure has two annular semi-circular grooves, one inner and one outer, on the contact surfaces of flange one and flange two. The annular semi-circular grooves on flange one and flange two match each other. The annular semi-circular grooves on flange one and flange two allow them to absorb stress through deformation when subjected to external tensile and compressive forces, compared to a flat structure, thus preventing structural fracture. A rubber ring two is installed in the inner annular semi-circular groove, and a rubber ring one is installed in the outer annular semi-circular groove. The rubber rings installed in both the inner and outer annular grooves form an ultimate seal to prevent smoke leakage, ensuring that smoke is effectively discharged and improving its sealing strength.

[0014] 2. The fire ventilation duct connection structure has symmetrical exhaust pipes on both sides of the connecting pipe. The top of the exhaust pipe is connected to the connecting pipe, and the bottom of the exhaust pipe is connected to the outside. A crossbeam is installed inside the exhaust pipe, and a vortex fan is rotatably connected to the upper surface of the crossbeam. The rotation of the vortex fan can ventilate the inside of the connecting pipe and facilitate the rapid dispersal of airflow. The dual exhaust pipes effectively connect the connecting pipe to the outside. In the event of a disaster, the dual vortex fans inside the exhaust pipes are activated to actively enhance the airflow velocity in the ventilation pipe and connecting pipe, so that the smoke can be quickly discharged and dispersed, thereby improving the ventilation efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the exhaust mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the sealing structure of this utility model;

[0018] In the diagram: 1. Ventilation duct; 2. Connecting pipe; 3. Flange 1; 4. Flange 2; 5. Rubber ring 1; 6. Rubber ring 2; 7. Bolt 1; 8. Exhaust duct; 9. Crossbeam; 10. Motor; 11. Turbine fan; 12. Clamp; 13. Sliding block; 14. Slide groove 1; 15. Fixing block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 2 To achieve convenient operation, improve sealing efficiency, enhance ventilation and smoke extraction efficiency, and save working time, this application provides a fire ventilation duct connection structure. The fire ventilation duct connection structure includes a connecting pipe 2, with flanges 4 installed at both ends of the connecting pipe 2. Flanges 3 are positioned at the left and right ends of flanges 4, and two annular semi-circular grooves are formed on the contact surfaces of flanges 3 and 4. The annular semi-circular grooves on flanges 3 and 4 are matched. A rubber ring 6 is installed in the inner annular semi-circular groove, and a rubber ring 5 is installed in the outer annular semi-circular groove. Exhaust pipes 8 are symmetrically arranged on both sides of the connecting pipe 2. The top of the exhaust pipes 8 is connected to the connecting pipe 2, and the bottom of the exhaust pipes 8 is connected to the outside. A crossbeam 9 is installed inside the exhaust pipe 8, and a turbine fan 11 is rotatably connected to the upper surface of the crossbeam 9. The turbine fan 11 rotates to ventilate the connecting pipe 2 and rapidly disperse the airflow.

[0021] Based on the above, by matching the annular semi-circular grooves of flange 1 3 and flange 2 4, an inner and outer double sealing cavity is formed. Rubber ring 1 5 and rubber ring 2 6 are embedded to construct a basic sealing layer. The symmetrical exhaust pipe 8 is connected to the connecting pipe 2 to form an airflow channel between the outside, the exhaust pipe and the connecting pipe. The crossbeam 9 provides support for the turbo fan 11. When the turbo fan 11 rotates, it can draw in outside air and push it into the connecting pipe 2 to accelerate the flue gas flow rate in the pipe.

[0022] Furthermore, the double-ring groove and rubber ring structure significantly improve the smoke leakage prevention capability compared to traditional flat flange seals. The symmetrical exhaust pipes paired with turbo fans lay the structural foundation for efficient smoke exhaust in fire-fighting scenarios, taking into account both the core requirements of sealing and smoke exhaust, and improving ventilation and smoke exhaust efficiency.

[0023] Please see Figures 1 to 2Flange 24 has through holes arranged in an array on both sides of the inner and outer annular semi-circular grooves. Bolt 17 is threaded into the through holes, and flange 3 and flange 24 are fastened together by bolt 17.

[0024] Based on the above, bolt 7 is inserted into the array of through holes of flange 4 and threadedly connected to flange 3. During the tightening process, the two flanges are squeezed, forcing rubber ring 5 and rubber ring 6 to undergo elastic deformation, filling the groove and the tiny gaps on the flange surface, while enhancing the connection strength of the two flanges and resisting external tensile or compressive impacts.

[0025] Furthermore, the array of through holes ensures that bolt 7 is subjected to uniform force, avoiding excessive local compression of the flange and deformation. The bolt tightening method facilitates installation and disassembly, enhances the sealing effect of the rubber ring, improves structural resistance to damage, and prevents loosening of connections during fire or installation.

[0026] Please see Figure 1 A ventilation pipe 1 is installed at the other end of flange 3.

[0027] Based on the above, ventilation duct 1 is fixedly connected to flange 3, so that ventilation duct 1, flange 3, flange 4, and connecting pipe 2 form a complete main airflow channel. Smoke generated during a fire can enter the connecting pipe 2 along ventilation duct 1 and then be discharged through the subsequent smoke exhaust structure.

[0028] Furthermore, reducing pipe connection points lowers the risk of flue gas leakage, clarifies the main airflow transmission path, ensures the continuity of flue gas transmission, avoids affecting exhaust efficiency due to channel breaks, and simplifies the overall structure while improving reliability.

[0029] Please see Figures 1 to 2 The connecting pipe 2 and the exhaust pipe 8 are symmetrically equipped with clamps 12 on both sides. The clamps 12 are contoured to the shape of the connecting pipe 2 and the exhaust pipe 8. The clamps 12 are connected by bolts with two threads.

[0030] Based on the above, the contoured clamp 12 fits the outer wall contour of the connecting pipe 2 and the exhaust pipe 8. When the bolt 2 is tightened, the clamp 12 contracts, forming a ring-shaped fixation at the connection of the two pipes, which counteracts the vibration generated by the rotation of the turbine fan 11 or the displacement force caused by the shaking of the building during a fire.

[0031] Furthermore, the contoured structure ensures that the clamp 12 fits tightly against the pipe, with even force distribution to prevent damage to the pipe's outer wall. Symmetrical installation and bolt tightening significantly improve the connection stability between the connecting pipe 2 and the exhaust pipe 8, preventing pipe detachment during smoke extraction and subsequent airflow channel failure.

[0032] Please see Figures 1 to 3A groove is provided inside the side wall of the connecting pipe 2 at the top connection port of the exhaust pipe 8. A slider 13 is slidably connected inside the groove. The slider 13 can close or open the connection port between the exhaust pipe 8 and the connecting pipe 2.

[0033] Based on the above, when the connecting port is closed, the air exchange between the exhaust pipe 8 and the connecting pipe 2 is blocked, and the airflow only flows naturally along the main channel (suitable for daily ventilation). When the connecting port is opened, the exhaust pipe 8 and the connecting pipe 2 are connected, providing a channel for outside air to enter the connecting pipe 2 (suitable for fire emergency smoke exhaust).

[0034] Furthermore, the sliding adjustment allows for flexible switching between daily ventilation and emergency smoke extraction modes. It is easy to operate without disassembling the pipes. The sliding groove precisely limits the slider 13, preventing slider 13 from shifting and causing sealing failure or channel blockage, thus improving reliability.

[0035] Please see Figures 1 to 3 A fixing block 15 is installed on the outer surface of the slider 13. The fixing block 15 is higher than the outer surface of the connecting pipe 2. A vertical groove is opened on the outer surface of the connecting pipe 2 at the fixing block 15. Moving the fixing block 15 can make the exhaust pipe 8 move along the groove.

[0036] Based on the above, the fixed block 15 serves as the operating fulcrum. When manually moved, it drives the slider 13 to slide up and down along the vertical slot. Adjusting the slider 13 causes it to move upward to close the connection between the exhaust pipe 8 and the connecting pipe 2, and to move downward to open the connection.

[0037] Furthermore, the fixing block 15 protrudes above the connecting pipe 2 for easy manual operation without the need for additional tools, and the vertical slot limit prevents the slider 13 from shifting.

[0038] Please see Figures 1 to 2 A motor 10 is installed at the bottom of the crossbeam 9, and the output shaft of the motor 10 passes through the crossbeam 9 and is fixedly connected to the turbofan 11.

[0039] Based on the above, after the motor 10 starts, the output shaft drives the turbo fan 11 to rotate at high speed. The rotation direction of the turbo fan 11 matches the airflow path, drawing in outside air from the bottom of the exhaust pipe 8 and pushing it into the connecting pipe 2 through the top connecting port. After mixing with the flue gas in the pipe, the overall airflow speed is accelerated, and the flue gas is pushed out along the main channel.

[0040] Furthermore, the motor 10 directly drives the turbofan 11, ensuring efficient power transmission and guaranteeing that the airflow push intensity meets the requirements of fire smoke exhaust. The crossbeam 9 provides support and protection for the motor 10, extending the service life of the equipment and ensuring stable operation in emergency scenarios.

[0041] In summary, in use, the connecting structure of this fire ventilation duct has flange 2 4 installed at both ends of the connecting pipe 2. Flange 3 is installed at the left and right ends of flange 2 4, and the surfaces of flange 3 and flange 2 4 that contact each other have two annular semi-circular grooves, one inner and one outer. The annular semi-circular grooves on flange 3 and flange 2 4 match each other. The annular semi-circular grooves on flange 3 and flange 2 4 allow the structure to absorb stress through deformation under external tension and pressure, compared to a flat structure, thus preventing structural fracture. A rubber ring 2 6 is installed in the inner annular semi-circular groove, and a rubber ring 5 is installed in the outer annular semi-circular groove. A rubber ring 6 is installed in both the inner and outer annular grooves. The rubber rings create an ultimate seal to prevent smoke leakage, ensuring that smoke is effectively discharged and improving its sealing strength. Exhaust pipes 8 are symmetrically arranged on both sides of the connecting pipe 2. The top of the exhaust pipes 8 is connected to the connecting pipe 2, and the bottom of the exhaust pipes 8 is connected to the outside. A crossbeam 9 is installed inside the exhaust pipe 8, and a turbo fan 11 is rotatably connected to the upper surface of the crossbeam 9. The rotation of the turbo fan 11 can ventilate the connecting pipe 2 and rapidly disperse the airflow. The dual exhaust pipes 8 effectively connect the connecting pipe 2 to the outside. In the event of a disaster, the dual turbo fans 11 inside the exhaust pipes 8 are activated to actively increase the airflow velocity in the ventilation pipes 1 and 2, allowing smoke to be quickly discharged and dispersed, thus improving ventilation efficiency.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire ventilation duct connection structure, comprising a connecting pipe (2), characterized in that: The connecting pipe (2) is equipped with flange two (4) at both ends. Flange one (3) is provided at the left and right ends of flange two (4). Flange one (3) is provided at the left and right ends of flange two (4). Flange one (3) and flange two (4) are provided with two annular semi-circular grooves, inner and outer. The annular semi-circular grooves on flange one (3) and flange two (4) match each other. Rubber ring two (6) is installed in the inner annular semi-circular groove, and rubber ring one (5) is installed in the outer annular semi-circular groove. Exhaust pipes (8) are symmetrically arranged on both sides of the connecting pipe (2). The top of exhaust pipe (8) is connected to the connecting pipe (2). The bottom of exhaust pipe (8) is connected to the outside. A crossbeam (9) is installed inside the exhaust pipe (8). A turbo fan (11) is rotatably connected to the upper surface of the crossbeam (9). The rotation of the turbo fan (11) can ventilate the inside of the connecting pipe (2) and make the airflow quickly disperse.

2. The fire ventilation duct connection structure according to claim 1, characterized in that: The flange 2 (4) has through holes arranged in an array on both sides of the inner and outer annular semi-circular grooves. Bolt 1 (7) is threaded into the through holes. The flange 1 (3) and flange 2 (4) are fastened by bolt 1 (7).

3. The fire ventilation duct connection structure according to claim 2, characterized in that: A ventilation pipe (1) is installed at the other end of the flange (3).

4. The fire ventilation duct connection structure according to claim 3, characterized in that: The connecting pipe (2) and the exhaust pipe (8) are symmetrically equipped with clamps (12). The clamps (12) are contoured to the shape of the connecting pipe (2) and the exhaust pipe (8). The clamps (12) are connected by bolts with two threads.

5. The fire ventilation duct connection structure according to claim 4, characterized in that: The connecting pipe (2) has a groove inside the side wall at the top of the exhaust pipe (8) and a slider (13) is slidably connected inside the groove. The slider (13) can close or open the connection between the exhaust pipe (8) and the connecting pipe (2).

6. The fire ventilation duct connection structure according to claim 5, characterized in that: A fixing block (15) is installed on the outer surface of the slider (13). The fixing block (15) is higher than the outer surface of the connecting pipe (2). A vertical groove is opened on the outer surface of the connecting pipe (2) at the fixing block (15). The slider (13) can be moved along the groove by moving the fixing block (15).

7. The fire ventilation duct connection structure according to claim 6, characterized in that: A motor (10) is installed at the bottom of the crossbeam (9), and the output shaft of the motor (10) passes through the crossbeam (9) and is fixedly connected to the turbofan (11).

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