Fire-fighting smoke exhaust fan

Abstract

The utility model relates to the technical field of fire-fighting smoke exhaust fans, and discloses a fire-fighting smoke exhaust fan which comprises a smoke exhaust pipeline and a conical pipe fixedly communicated with the two ends of the smoke exhaust pipeline, and cross rings are fixedly connected to the left end and the right end of the smoke exhaust pipeline. According to the fire-fighting smoke exhaust fan, by introducing a water cooling system composed of the heat dissipation annular box and the connecting pipe, the temperature of the smoke exhaust pipeline and the motor in the smoke exhaust pipeline is remarkably reduced, the motor is effectively prevented from being overheated, the service life of equipment is prolonged, meanwhile, the water cooling system can further utilize the cooling effect of water mist, the smoke exhaust safety is improved, and the service life of the equipment is prolonged. According to the fire-fighting smoke exhaust fan, smoke can be rapidly exhausted when a fire occurs, personnel safety is guaranteed, the flowing efficiency and uniformity of the smoke in a smoke exhaust pipeline are improved by optimizing the design of a conical pipe and axial flow fan blades, the smoke exhaust effect is further enhanced, the stability and durability of a smoke exhaust system are enhanced through the arrangement of a supporting block and a grating, and the fire-fighting smoke exhaust fan is suitable for popularization and application. And blockage or damage caused by entering of external sundries is prevented.

Description

Technical Field

[0001] This application relates to the field of fire exhaust fan technology, specifically fire exhaust fans. Background Technology

[0002] Fire exhaust fans are ventilation devices used in fire protection systems. Their main function is to exhaust smoke and toxic gases during a fire to mitigate the spread of fire and ensure the safety of personnel. They generate strong suction or pressure to expel smoke from inside a building through specific exhaust vents and ducts, thus maintaining clear visibility in evacuation routes and rescue areas. In fire emergency response scenarios, fire exhaust fans are crucial smoke extraction equipment, and their stability and reliability directly affect the safety of smoke extraction and personnel at the fire scene.

[0003] However, during the use of common exhaust fans, the flue gas temperature is relatively high. When traditional motors operate under high temperature conditions, their internal windings and insulation materials are prone to aging due to heat, resulting in increased resistance, reduced efficiency, and even short circuits and burnout. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a fire exhaust fan that has advantages such as high temperature resistance, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a fire exhaust fan, comprising an exhaust pipe and a tapered pipe with both ends of the exhaust pipe fixedly connected, wherein both ends of the exhaust pipe are fixedly connected to a cross ring, and the inside of the cross ring is rotatably connected to two symmetrically arranged air shafts, and a set of axial fan blades are fixedly connected to the ends of the two air shafts that are far apart from each other.

[0006] Both ends of the tapered tube, which are far apart from each other, are fixedly connected to annular nozzles. A set of nozzles is fixedly connected to the outer surface of each of the two annular nozzles. Two heat dissipation annular boxes are fixedly connected to the outer surface of the exhaust pipe. A connecting pipe is fixedly connected to the top of each of the two heat dissipation annular boxes. The other end of each connecting pipe is fixedly connected to the annular nozzle that is close to it.

[0007] The above solution, through the introduction of a water-cooling system consisting of a heat dissipation ring box and connecting pipes, significantly reduces the temperature of the smoke exhaust duct and its internal motor, effectively preventing motor overheating and extending the service life of the equipment. Simultaneously, this water-cooling system further utilizes the cooling effect of water mist to improve smoke exhaust safety, ensuring rapid smoke removal in the event of a fire and protecting personnel safety. The fire exhaust fan also improves the flow efficiency and uniformity of smoke in the exhaust duct through optimized tapered tube and axial fan blade design, further enhancing the smoke exhaust effect. The support blocks and grilles enhance the stability and durability of the smoke exhaust system, preventing blockage or damage caused by external debris.

[0008] Furthermore, a set of support blocks are fixedly connected to the outer surface of the tapered tube, and each support block is fixedly connected to the annular nozzle adjacent to it.

[0009] The above solution, through the setting of support blocks, can achieve a stable connection between the annular nozzle and the conical pipe, ensuring that it will not loosen or deform due to airflow impact during the smoke exhaust process, thus guaranteeing the stability and durability of the smoke exhaust system.

[0010] Furthermore, a first bevel gear is fixedly connected to one end of each of the two wind shafts that are close to each other, a power shaft is rotatably connected to the top of the exhaust pipe, and a second bevel gear is fixedly connected to the bottom of the power shaft. Both of the first bevel gears are meshed with the second bevel gear.

[0011] Through the above scheme, the power on the power shaft can be efficiently transmitted to the two wind shafts by the meshing connection of the first bevel gear and the second bevel gear, thereby driving the axial flow fan blades to rotate and thus realizing the smoke exhaust function.

[0012] Furthermore, a motor is installed above the exhaust duct, and the output end of the motor is fixedly connected to the top of the power shaft.

[0013] The above scheme, through the installation of a motor, can provide power for the rotation of the drive shaft.

[0014] Furthermore, two support plates are fixedly connected to the top of the exhaust pipe, and both support plates are fixedly connected to the motor.

[0015] The above solution, through the setting of the support plate, can provide a stable mounting platform for the motor, ensuring that the motor will not shift or be damaged due to vibration during operation.

[0016] Furthermore, each of the two heat dissipation annular boxes is fixedly connected to a water inlet pipe at its top, and the water inlet pipe is connected to an external fire water pipe. A solenoid valve is installed at the middle of each of the two water inlet pipes.

[0017] The above solution, through the setting of the water inlet pipe and solenoid valve, allows for convenient control of the water flow in and out.

[0018] Furthermore, each of the two tapered tubes has a grid installed at the ends that are far apart from each other.

[0019] The above solution, through the installation of the grille, can prevent external debris from entering the exhaust duct and causing blockage or damage to the axial fan blades.

[0020] Furthermore, a smoke concentration sensor is installed on the inner bottom wall of the exhaust duct.

[0021] By implementing the above-mentioned method and monitoring the smoke concentration in the exhaust duct in real time, fire hazards can be detected in a timely manner.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This fire-fighting smoke exhaust fan, through the introduction of a water-cooling system consisting of a heat dissipation ring box and connecting pipes, significantly reduces the temperature of the smoke exhaust duct and its internal motor, effectively preventing motor overheating and extending the service life of the equipment. At the same time, the water-cooling system can further utilize the cooling effect of water mist to improve smoke exhaust safety, ensuring that smoke can be quickly discharged in the event of a fire, protecting personnel safety. The fire-fighting smoke exhaust fan also improves the flow efficiency and uniformity of smoke in the smoke exhaust duct through optimized design of the conical tube and axial flow fan blades, further enhancing the smoke exhaust effect. The setting of support blocks and grilles enhances the stability and durability of the smoke exhaust system, preventing blockage or damage caused by the entry of external debris. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a three-dimensional sectional view of the overall structure of this application;

[0026] Figure 3 This is a front view of the overall structure of this application;

[0027] Figure 4 This is a cross-sectional view of the overall structure of this application.

[0028] In the picture:

[0029] 1. Smoke exhaust duct; 2. Conical pipe; 3. Cross ring; 4. Fan shaft; 5. Axial flow fan blade; 6. Annular nozzle; 7. Nozzle; 8. Heat dissipation annular box; 9. Connecting pipe; 10. Support block; 11. First conical gear; 12. Power shaft; 13. Second conical gear; 15. Motor; 16. Support plate; 17. Water inlet pipe; 18. Solenoid valve; 19. Grille; 20. Smoke concentration sensor. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1 , Figure 2 and Figure 3 The fire exhaust fan in this embodiment includes an exhaust duct 1 and a tapered pipe 2 fixedly connected to both ends of the exhaust duct 1. Both ends of the exhaust duct 1 are fixedly connected to a cross ring 3. The inside of the cross ring 3 is rotatably connected to two symmetrically arranged air shafts 4. The ends of the two air shafts 4 that are far apart from each other are fixedly connected to a set of axial flow fan blades 5. Through the arrangement of the tapered pipe 2 and the two sets of axial flow fan blades 5, the flow of smoke in the exhaust duct 1 can be guided and accelerated more effectively. The gradually narrowing structure of the tapered pipe 2 can increase the airflow speed, while the symmetrical arrangement of the two sets of axial flow fan blades 5 ensures the uniform distribution and efficient discharge of smoke in the duct, thereby improving the safety of smoke exhaust.

[0032] Please see Figure 1 , Figure 2 and Figure 3 Two fan shafts 4 are fixedly connected to each other at their close ends with a first bevel gear 11. The top end of the exhaust pipe 1 is rotatably connected to a power shaft 12. The bottom end of the power shaft 12 is fixedly connected to a second bevel gear 13. Both first bevel gears 11 are meshed with the second bevel gear 13. Through the meshing connection of the first bevel gear 11 and the second bevel gear 13, the power on the power shaft 12 can be efficiently transmitted to the two fan shafts 4, driving the axial flow fan blades 5 to rotate, thereby realizing the exhaust function.

[0033] Please see Figure 1 , Figure 2 and Figure 3Both ends of the tapered pipe 2, which are far apart from each other, are fixedly connected to annular nozzles 6. A set of nozzles 7 are fixedly connected to the outer surface of the two annular nozzles 6. Through the setting of the nozzles 7, water mist or fire extinguishing agent can be sprayed in the annular nozzles 6. These water mist or fire extinguishing agents can effectively reduce the temperature of the smoke and moisten the particulate matter in the smoke, which helps to reduce the toxicity and flammability of the smoke and improve the safety and efficiency of the smoke exhaust process. Two heat dissipation annular boxes 8 are fixedly connected to the outer surface of the smoke exhaust pipe 1. The top of the two heat dissipation annular boxes 8 are fixedly connected to the connecting pipes 9. The other end of each connecting pipe 9 is fixedly connected to the annular nozzle 6 that is close to it. Through the setting of the heat dissipation annular boxes 8 and connecting pipes 9, a circulating water cooling system can be formed. When the temperature in the smoke exhaust pipe 1 rises, water enters the heat dissipation annular box 8 through the water inlet pipe 17, absorbs heat, and flows back to the annular nozzle 6 through the connecting pipe 9 for recirculation. This can not only cool down the smoke exhaust pipe 1 and prevent overheating, but also further utilize the cooling effect of water mist to enhance the smoke exhaust effect.

[0034] Please see Figure 1 , Figure 2 and Figure 3 A motor 15 is installed above the exhaust pipe 1. The output end of the motor 15 is fixedly connected to the top of the power shaft 12. The motor 15 provides power for the rotation of the power shaft 12. A set of support blocks 10 is fixedly connected to the outer surface of the tapered pipe 2. Each support block 10 is fixedly connected to the annular nozzle 6 adjacent to it. The support blocks 10 ensure a stable connection between the annular nozzle 6 and the tapered pipe 2, ensuring that the exhaust system will not loosen or deform due to airflow impact during the exhaust process, thus guaranteeing the stability and durability of the exhaust system.

[0035] Please see Figure 1 , Figure 2 and Figure 3 The top of the smoke exhaust pipe 1 is fixedly connected to two support plates 16, both of which are fixedly connected to the motor 15. The support plates 16 provide a stable mounting platform for the motor 15, ensuring that the motor 15 will not be displaced or damaged due to vibration during operation. The tops of the two heat dissipation ring boxes 8 are fixedly connected to water inlet pipes 17, which are connected to the external fire water pipes. Solenoid valves 18 are installed in the middle of the two water inlet pipes 17. The water inlet pipes 17 and solenoid valves 18 can be used to easily control the flow of water.

[0036] Please see Figure 1 , Figure 2 and Figure 4Both tapered pipes 2 are equipped with grilles 19 at their far ends. The grilles 19 prevent external debris from entering the smoke exhaust pipe 1 and causing blockage or damage to the axial fan blades 5. A smoke concentration sensor 20 is installed on the inner bottom wall of the smoke exhaust pipe 1. By monitoring the smoke concentration in the smoke exhaust pipe 1 in real time, fire hazards can be detected in time.

[0037] In this embodiment, the fire exhaust fan, through the introduction of a water-cooling system consisting of a heat dissipation ring box 8 and a connecting pipe 9, significantly reduces the temperature of the exhaust duct 1 and its internal motor 15, effectively preventing the motor 15 from overheating and extending the service life of the equipment. At the same time, the water-cooling system can further utilize the cooling effect of water mist to improve the safety of smoke exhaust, ensuring that smoke can be quickly discharged in the event of a fire, thus protecting personnel safety. The fire exhaust fan also improves the flow efficiency and uniformity of smoke in the exhaust duct 1 by optimizing the design of the conical tube 2 and the axial flow fan blades 5, further enhancing the smoke exhaust effect. The setting of the support block 10 and the grille 19 enhances the stability and durability of the smoke exhaust system, preventing blockage or damage caused by the entry of external debris.

[0038] The working principle of the above embodiment is as follows: First, when a fire occurs, the fire exhaust fan starts. The motor 15 serves as the power source, and its output end is fixedly connected to the power shaft 12, providing rotational power for the entire smoke exhaust system. The power shaft 12 meshes with two first bevel gears 11 through the second bevel gear 13, transmitting power to the two fan shafts 4. These two fan shafts 4 are located at the left and right ends of the smoke exhaust duct 1, respectively, and are rotatably connected through the internal cross ring 3, ensuring stable power transmission.

[0039] As the fan shaft 4 rotates, the axial fan blades 5 fixed at one end also begin to rotate. The symmetrical arrangement of the axial fan blades 5 makes the smoke flow more evenly in the exhaust duct 1, improving the safety of smoke exhaust. At the same time, the gradually narrowing structure of the tapered tube 2 can increase the airflow speed, further accelerating the exhaust of smoke.

[0040] During the smoke extraction process, the temperature inside the smoke extraction duct 1 may rise. To lower the temperature, a water-cooling system consisting of a heat dissipation annular box 8 and a connecting pipe 9 is activated. Water enters the heat dissipation annular box 8 through the inlet pipe 17, absorbs the heat from the smoke extraction duct 1 and its internal motor 15, and then flows back to the annular spray nozzle 6 through the connecting pipe 9 for recirculation. In this process, the cooling effect of the water mist not only cools the smoke extraction duct 1 and prevents overheating, but also enhances the smoke extraction effect.

[0041] In addition, the nozzles 7 on the annular nozzle 6 can spray water mist or fire extinguishing agents, which can effectively reduce the temperature of the smoke and moisten the particulate matter in the smoke, reducing the toxicity and flammability of the smoke.

[0042] Finally, the grille 19 at one end of the tapered tube 2 prevents external debris from entering the smoke exhaust duct 1, causing blockage or damage to the axial fan blades 5, thus ensuring the stable operation of the smoke exhaust system. Simultaneously, the smoke concentration sensor 20 inside the smoke exhaust duct 1 monitors the smoke concentration in real time, promptly detecting fire hazards and providing crucial information for fire emergency response.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire exhaust fan, comprising an exhaust duct (1) and a tapered pipe (2) fixedly connected at both ends of the exhaust duct (1), characterized in that: Both ends of the exhaust pipe (1) are fixedly connected to a cross ring (3). Inside the cross ring (3) are two symmetrically arranged wind shafts (4). At the ends of the two wind shafts (4) that are far apart from each other, a set of axial flow fan blades (5) are fixedly connected. Both ends of the tapered tube (2) that are far apart from each other are fixedly connected to annular nozzles (6). The outer surfaces of the two annular nozzles (6) are fixedly connected to a set of nozzles (7). The outer surface of the exhaust pipe (1) is fixedly connected to two heat dissipation annular boxes (8). The top ends of the two heat dissipation annular boxes (8) are fixedly connected to connecting pipes (9). The other end of each connecting pipe (9) is fixedly connected to the annular nozzle (6) that is close to it.

2. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: A set of support blocks (10) are fixedly connected to the outer surface of the tapered tube (2), and each support block (10) is fixedly connected to the annular nozzle (6) adjacent to it.

3. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: The two wind shafts (4) are fixedly connected to a first bevel gear (11) at their close ends. The top of the exhaust pipe (1) is rotatably connected to a power shaft (12). The bottom of the power shaft (12) is fixedly connected to a second bevel gear (13). The two first bevel gears (11) are meshed with the second bevel gear (13).

4. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: A motor (15) is provided above the exhaust pipe (1), and the output end of the motor (15) is fixedly connected to the top of the power shaft (12).

5. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: The top of the exhaust pipe (1) is fixedly connected to two support plates (16), and both support plates (16) are fixedly connected to the motor (15).

6. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: The top of each of the two heat dissipation ring boxes (8) is fixedly connected to a water inlet pipe (17), which is connected to an external fire water pipe. A solenoid valve (18) is installed at the middle of each of the two water inlet pipes (17).

7. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: Each of the two tapered tubes (2) has a grid (19) installed at the ends that are far apart from each other.

8. The fire-fighting smoke exhaust fan according to claim 1, characterized in that: A smoke concentration sensor (20) is installed on the inner bottom wall of the exhaust pipe (1).

Images