Portable fire-fighting smoke ventilator

Abstract

The utility model discloses a portable fire-fighting smoke ventilator, and belongs to the field of smoke ventilators, the smoke ventilator comprises a base, two supporting plates symmetrically and fixedly arranged on the base and a smoke ventilator main body arranged between the two supporting plates, and universal wheels with self-locking functions are mounted at four corners of the bottom end of the base; a smoke guiding mechanism is arranged on the smoke extractor body and comprises a corrugated pipe installed at the output end of the smoke extractor body through bolts and a plurality of spiral guiding plates fixedly arranged in the corrugated pipe in an annular array mode, and a positioning ring is fixedly connected to the end, away from the smoke extractor body, of the corrugated pipe. In the smoke guide mechanism, a conical corrugated pipe capable of being folded and stored is matched with a spiral guide plate, the smoke exhaust track can be changed, smoke moves in the spiral direction in the direction away from the smoke extractor body, the conical structure of the corrugated pipe promotes smoke to be gathered towards the middle of a port, the smoke impact force is enhanced, the exhausted smoke is effectively prevented from being sucked back by the smoke extractor, and the smoke exhaust efficiency is improved. And the smoke exhaust efficiency is improved.

Description

Technical Field

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

[0002] A smoke exhaust fan is a device that uses an electric motor to drive fan blades to expel fumes or smoke outdoors. Fire-fighting smoke exhaust fans play a crucial role in fire rescue operations. By promptly removing smoke and harmful gases from buildings, they effectively control the spread of fire, reduce the risk of smoke accumulation, buy valuable time for evacuation and rescue efforts, and ensure the safety of lives.

[0003] Chinese utility model patent CN222317200U discloses an electric portable fire smoke exhaust fan. It achieves rapid movement by adding casters to the lower end of the casing; the added pull rod, combined with an automatic return structure, not only facilitates movement but also automatically returns to its original position after use, effectively saving space; the rotatable casing design allows for easy adjustment of the smoke exhaust angle, further improving the fire smoke exhaust effect. However, this electric portable fire smoke exhaust fan lacks a smoke guide pipe, making it prone to re-suction of the emitted smoke during the exhaust process, resulting in reduced smoke exhaust efficiency and affecting the smoke exhaust effect during fire rescue.

[0004] Therefore, this application provides a portable fire smoke exhaust fan to solve the above problems. Utility Model Content

[0005] This application provides a portable fire smoke exhaust fan, which aims to solve the problems mentioned in the background art, such as the lack of a smoke guide pipe in existing fire smoke exhaust fans, which leads to the exhaust smoke being easily sucked back and the smoke exhaust efficiency being low.

[0006] To achieve the above objectives, this application provides the following technical solution: a portable fire smoke exhaust fan, comprising a base, two support plates symmetrically fixed on the base, and a smoke exhaust fan body disposed between the two support plates. The base has four self-locking casters installed at its bottom corners. To prevent the exhaust smoke from returning, the smoke exhaust fan body is provided with a smoke guiding mechanism. The smoke guiding mechanism includes a foldable, corrugated tube bolted to the output end of the smoke exhaust fan body and multiple spiral guide plates arranged in a ring array within the corrugated tube. A positioning ring is fixedly connected to the end of the corrugated tube away from the smoke exhaust fan body. The foldable, retractable conical corrugated pipe in the smoke guiding mechanism, combined with the spiral guide plate, alters the exhaust trajectory of the flue gas, causing it to move away from the main body of the exhaust fan along the spiral direction. The conical structure of the corrugated pipe also encourages the flue gas to gather towards the center of the port, enhancing its impact force and effectively preventing the exhaust gas from being re-absorbed by the exhaust fan, thus improving exhaust efficiency. The positioning ring provides stability and guidance, facilitating connection with other exhaust pipes or equipment and enhancing the overall stability and practicality of the exhaust system.

[0007] Preferably, the corrugated pipe is in the shape of a frustum conical tube. This causes the channel to gradually narrow during the exhaust process, compressing the flue gas and increasing its flow velocity, thereby enhancing the impact force of the flue gas. At the same time, the frustum conical structure promotes the accumulation of flue gas towards the center of the port, effectively avoiding the problem of the flue gas being re-drawn back by the exhaust fan after diffusion, thus improving the exhaust efficiency.

[0008] Preferably, both the corrugated pipe and the spiral guide plate are made of high-temperature and corrosion-resistant materials. The corrugated pipe and spiral guide plate can be made of materials such as 310S stainless steel or polytetrafluoroethylene (PTFE). 310S stainless steel has excellent high-temperature resistance, with a maximum operating temperature of up to 1200℃, strong oxidation resistance, and a certain degree of corrosion resistance; polytetrafluoroethylene is a polymer material with excellent high and low temperature resistance (operating temperature range -190℃ to 260℃), extremely high chemical stability, almost no reaction with any chemical substances, and extremely strong corrosion resistance.

[0009] Preferably, the positioning ring is made of stainless steel. The positioning ring can be made of 304 stainless steel. 304 stainless steel is a general-purpose stainless steel material with good corrosion resistance, heat resistance, excellent mechanical properties, good machinability, and a relatively moderate price, making it suitable for large-scale production applications.

[0010] Preferably, to ensure the stability of the corrugated pipe's deployment: a slider is fixedly connected to the top of the exhaust fan body, a guide rail fixedly connected to the positioning ring is slidably inserted onto the slider, and a knurled bolt that abuts against the guide rail is threaded onto the slider. The structure consisting of the slider, guide rail, and knurled bolt at the top of the exhaust fan body ensures that the corrugated pipe always remains in a laterally deployed state, preventing it from bending or collapsing during exhaust due to gravity, wind force, or smoke impact, ensuring smooth smoke discharge, and improving the reliability and stability of the exhaust fan. Simultaneously, this structure facilitates the deployment and retraction of the corrugated pipe, improving the ease of use of the equipment.

[0011] Preferably, to facilitate the adjustment of the angle of the smoke exhaust fan body: a rotating rod, fixedly connected to the smoke exhaust fan body, is rotatably inserted into the top of each of the two support plates via a round hole. A housing is fixedly installed on one of the support plates. Inside the housing, a worm gear, fixedly connected to the rotating rod, is rotatably disposed. A worm, meshing with the worm gear, is rotatably inserted into the housing. A handle is fixedly connected to one end of the worm. The adjustment mechanism, consisting of the rotating rod, worm gear, worm, and handle, allows for convenient adjustment of the output tilt angle of the smoke exhaust fan body. This enables the smoke exhaust fan to direct smoke in a suitable direction according to the actual conditions of the fire scene, expanding the smoke exhaust coverage area and improving the smoke exhaust effect. Simultaneously, the meshing transmission between the worm gear and the worm has a self-locking function, preventing the smoke exhaust fan body from rotating on its own due to external forces after angle adjustment, ensuring the stability and reliability of the smoke exhaust angle.

[0012] This application utilizes a foldable, retractable conical corrugated pipe in the smoke guiding mechanism, in conjunction with a spiral guide plate, to alter the exhaust trajectory of the flue gas. This causes the flue gas to move in a spiral direction away from the main body of the exhaust fan. Furthermore, the conical structure of the corrugated pipe encourages the flue gas to gather towards the center of the port, enhancing the impact force of the flue gas and effectively preventing the exhaust gas from being re-absorbed by the exhaust fan, thus improving exhaust efficiency. The positioning ring provides stability and guidance, facilitating connection with other exhaust pipes or equipment and enhancing the overall stability and practicality of the exhaust system.

[0013] The structure consisting of a slider, guide rail, and knurled bolts on the top of the exhaust fan body ensures that the corrugated pipe always remains in a horizontally extended state, preventing it from bending or collapsing during exhaust due to gravity, wind force, or smoke impact. This ensures smooth exhaust and improves the reliability and stability of the exhaust fan. Furthermore, this structure facilitates the unfolding and retraction of the corrugated pipe, enhancing the ease of use of the equipment.

[0014] This application utilizes an adjustment mechanism comprised of a rotating rod, worm gear, worm, and handle to conveniently adjust the tilt angle of the output end of the smoke exhaust fan. This allows the smoke exhaust fan to direct smoke in a suitable direction according to the actual conditions at the fire scene, expanding the smoke exhaust coverage area and improving the smoke exhaust effect. Simultaneously, the meshing transmission between the worm gear and the worm has a self-locking function, preventing the smoke exhaust fan from rotating on its own due to external forces after the angle is adjusted, thus ensuring the stability and reliability of the smoke exhaust angle. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a portable fire smoke exhaust fan;

[0016] Figure 2 for Figure 1 The structural bottom view in the middle;

[0017] Figure 3 This is a schematic diagram of the internal structure of the shell.

[0018] In the picture:

[0019] 1. Base; 2. Support plate; 21. Rotating rod; 22. Housing; 221. Worm gear; 222. Worm; 223. Handle; 3. Main body of the smoke exhaust fan; 4. Casters; 5. Smoke guiding mechanism; 51. Corrugated pipe; 52. Spiral guide plate; 53. Positioning ring; 54. Slider; 55. Guide rail; 56. Knurled bolt. Detailed Implementation

[0020] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Example 1

[0022] This embodiment provides a portable fire smoke exhaust fan, such as... Figure 1-3As shown, the smoke exhaust fan includes a base 1, two support plates 2 symmetrically fixed on the base 1, and a main body 3 of the smoke exhaust fan positioned between the two support plates 2. Each of the four corners of the base 1 is equipped with self-locking casters 4. These casters 4 facilitate the movement of the portable fire-fighting smoke exhaust fan, enabling rapid transport to a designated location at a fire scene and improving rescue efficiency. Upon reaching the designated location, the casters 4 can be locked using the self-locking function, ensuring the smoke exhaust fan is securely placed and preventing displacement due to external forces during smoke extraction, thus guaranteeing safe and stable smoke extraction operations. The casters 4 can rotate freely 360 degrees. When the smoke exhaust fan is manually pushed, the casters 4 rotate in coordination, allowing for flexible movement. When it is necessary to fix the smoke exhaust fan, the self-locking device on the casters 4 locks the rotation shaft and steering mechanism, restricting their movement and steering, thereby fixing the smoke exhaust fan in the designated position.

[0023] To prevent the exhaust fumes from being drawn back into the exhaust fan: a smoke guiding mechanism 5 is provided on the main body 3 of the exhaust fan. The smoke guiding mechanism 5 includes a foldable conical corrugated pipe 51 that is bolted to the output end of the exhaust fan 3, and multiple spiral guide plates 52 fixedly arranged in a ring array inside the corrugated pipe 51. A positioning ring 53 is fixedly connected to the end of the corrugated pipe 51 away from the exhaust fan 3. Through the foldable conical corrugated pipe 51 and the spiral guide plates 52 in the smoke guiding mechanism 5, the exhaust trajectory of the fumes can be changed, causing the fumes to move in a spiral direction away from the exhaust fan 3. The conical structure of the corrugated pipe 51 also causes the fumes to gather towards the center of the port, increasing the impact force of the fumes and effectively preventing the exhaust fumes from being drawn back into the exhaust fan, thus improving the exhaust efficiency. The positioning ring 53 plays a stabilizing and guiding role, facilitating connection with other exhaust pipes or equipment, and improving the overall stability and practicality of the exhaust system. When the main body 3 of the exhaust fan is working, the generated flue gas enters the bellows 51 from the output end. The spiral guide plate 52 guides the flue gas to form a spiral motion trajectory. Under the action of centrifugal force, the flue gas moves to the outside of the bellows 51. At the same time, the conical bellows 51 gradually narrows the flue gas channel, compresses the flue gas, increases the flow rate, and gathers in the middle of the port before being discharged at high speed. The positioning ring 53 can be snapped into the external pipe or fixedly connected in other ways to ensure the stability of the position of the bellows 51 port and prevent flue gas leakage.

[0024] The corrugated pipe 51 is shaped like a truncated cone. This design causes the flue gas to gradually narrow during discharge, compressing it and increasing its velocity, thus enhancing its impact force. Simultaneously, the truncated cone structure encourages the flue gas to concentrate at the center of the outlet, effectively preventing it from being re-absorbed by the exhaust fan after diffusion, thereby improving exhaust efficiency. When the flue gas generated by the exhaust fan body 3 enters the truncated cone-shaped corrugated pipe 51, its inner diameter gradually decreases, compressing it within the limited space. According to fluid mechanics principles, this causes its velocity to increase accordingly. During flow, the flue gas is constrained by the truncated cone wall, converging towards the center of the outlet and ultimately discharged at high speed and in a concentrated state, reducing the possibility of flue gas backflow.

[0025] Both the corrugated pipe 51 and the spiral guide plate 52 are made of high-temperature and corrosion-resistant materials. The corrugated pipe 51 and the spiral guide plate 52 can be made of materials such as 310S stainless steel or polytetrafluoroethylene (PTFE). 310S stainless steel has excellent high-temperature resistance, with a maximum operating temperature of up to 1200℃, strong oxidation resistance, and a certain degree of corrosion resistance. PTFE is a polymer material with excellent high and low temperature resistance (operating temperature range -190℃ to 260℃), extremely high chemical stability, and almost no reaction with any chemical substances, exhibiting extremely strong corrosion resistance. In a fire, high temperatures and corrosive substances can damage the components of the smoke exhaust fan. 310S stainless steel, due to its high-temperature resistance, is not easily deformed or melted in high-temperature environments, and its anti-oxidation layer effectively resists oxidation. The high molecular structure of PTFE ensures the stability of its molecular chains in high and low temperature environments, and its smooth surface is not easily adhered to or corroded by corrosive substances, thus enabling the corrugated pipe 51 and the spiral guide plate 52 to guide and transport flue gas normally even under harsh conditions.

[0026] The positioning ring 53 is made of stainless steel. 304 stainless steel can be used. 304 stainless steel is a general-purpose stainless steel material with good corrosion resistance, heat resistance, excellent mechanical properties, good machinability, and a relatively moderate price, making it suitable for large-scale production applications. The alloy composition of 304 stainless steel forms a dense oxide protective film on its surface, effectively isolating oxygen, moisture, and corrosive gases from the air, preventing further oxidation and corrosion. During use, the positioning ring 53, with its own strength and stability, firmly fixes the bellows 51 port, maintaining the reliability of the connection structure even when subjected to flue gas pressure and external forces.

[0027] Example 2

[0028] Unlike Embodiment 1, to ensure the stability of the bellows 51 during deployment, a slider 54 is fixedly connected to the top of the exhaust fan body 3. A guide rail 55, which is fixedly connected to the positioning ring 53, is slidably inserted into the slider 54. A knurled bolt 56, which abuts against the guide rail 55, is threaded onto the slider 54. The structure consisting of the slider 54, guide rail 55, and knurled bolt 56 at the top of the exhaust fan body 3 ensures that the bellows 51 always remains in a horizontally deployed state, preventing the bellows 51 from bending or collapsing during exhaust due to gravity, wind force, or smoke impact, ensuring smooth exhaust and improving the reliability and stability of the exhaust fan. Simultaneously, this structure facilitates the deployment and retraction of the bellows 51, improving the ease of use of the equipment. When in use, the folded bellows 51 is pulled open, and the positioning ring 53 drives the guide rail 55 to slide within the slider 54, so that the bellows 51 gradually unfolds. When the bellows 51 is unfolded to the appropriate position, the knurled bolt 56 is tightened so that its end is in close contact with the guide rail 55, restricting the sliding of the guide rail 55 within the slider 54, thereby fixing the unfolded state of the bellows 51. When storing, the knurled bolt 56 is loosened, the bellows 51 is folded, and the guide rail 55 slides back within the slider 54.

[0029] Example 3

[0030] Unlike Embodiment 1, to facilitate the adjustment of the angle of the smoke exhaust fan body 3: The tops of both support plates 2 are rotatably connected to rotating rods 21, which are fixedly connected to the smoke exhaust fan body 3, via round holes. A housing 22 is fixedly installed on one of the support plates 2. Inside the housing 22, a worm gear 221, fixedly connected to the rotating rod 21, is rotatably installed. A worm 222, meshing with the worm gear 221, is rotatably inserted into the housing 22. One end of the worm 222 is fixedly connected to a handle 223. Through the adjustment mechanism composed of the rotating rod 21, worm gear 221, worm 222, and handle 223, the tilt angle of the output end of the smoke exhaust fan body 3 can be easily adjusted, allowing the smoke exhaust fan to direct smoke in a suitable direction according to the actual situation at the fire scene, expanding the smoke exhaust coverage area and improving the smoke exhaust effect. Simultaneously, the meshing transmission between the worm gear 221 and the worm 222 has a self-locking function, preventing the smoke exhaust fan body 3 from rotating on its own due to external force after the angle is adjusted, ensuring the stability and reliability of the smoke exhaust angle. Rotating handle 223 drives worm 222 to rotate. Worm 222 meshes with worm wheel 221, converting the rotational motion of worm 222 into the rotational motion of worm wheel 221. Worm wheel 221 drives the exhaust fan body 3 to rotate through rotating rod 21, thereby adjusting the tilt angle of the exhaust fan body 3. Due to the transmission characteristics of worm wheel 221 and worm 222, after stopping the rotation of handle 223, worm wheel 221 cannot rotate on its own under the action of worm 222, thus achieving angle locking.

[0031] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A portable fire smoke exhaust fan, comprising a base (1), two support plates (2) symmetrically fixed on the base (1), and a smoke exhaust fan body (3) disposed between the two support plates (2), wherein the four corners of the bottom end of the base (1) are equipped with casters (4) with self-locking function. Its features are: The main body (3) of the exhaust fan is provided with a smoke guiding mechanism (5). The smoke guiding mechanism (5) includes a conical corrugated tube (51) that can be folded and stored and is installed on the output end of the main body (3) of the exhaust fan by bolts, and a plurality of spiral guide plates (52) fixedly arranged in a ring array inside the corrugated tube (51). A positioning ring (53) is fixedly connected to one end of the corrugated tube (51) away from the main body (3).

2. The portable fire-fighting smoke exhaust fan according to claim 1, characterized in that: The corrugated pipe (51) is in the shape of a frustum conical tube.

3. The portable fire smoke exhaust fan according to claim 1, characterized in that: Both the corrugated pipe (51) and the spiral guide plate (52) are made of high-temperature and corrosion-resistant materials.

4. The portable fire-fighting smoke exhaust fan according to claim 1, characterized in that: The positioning ring (53) is made of stainless steel.

5. The portable fire-fighting smoke exhaust fan according to claim 1, characterized in that: A slider (54) is fixedly connected to the top of the main body (3) of the smoke exhaust fan. A guide rail (55) that is fixedly connected to the positioning ring (53) is slidably inserted on the slider (54). A knurled bolt (56) that abuts against the guide rail (55) is threaded onto the slider (54).

6. The portable fire-fighting smoke exhaust fan according to claim 1, characterized in that: The top of each of the two support plates (2) is rotatably connected to a rotating rod (21) that is fixedly connected to the main body (3) of the exhaust fan through a round hole. A housing (22) is fixedly installed on one of the support plates (2). A worm gear (221) fixedly connected to the rotating rod (21) is rotatably arranged inside the housing (22). A worm (222) meshing with the worm gear (221) is rotatably inserted on the housing (22). A handle (223) is fixedly connected to one end of the worm (222).

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