Fire-fighting smoke exhaust fan

Abstract

The utility model relates to the technical field of fire-fighting equipment, and particularly discloses a fire-fighting smoke exhaust fan which comprises a mounting frame, a smoke exhaust barrel, a supporting frame, a fan barrel, a driving mechanism and a cleaning mechanism, the smoke exhaust barrel is fixedly arranged on the mounting frame, and an air inlet grille is arranged at an inlet of the smoke exhaust barrel. The supporting frame is fixedly arranged on the inner wall face of the smoke discharging cylinder. The fan barrel is installed on the supporting frame and is concentric with the smoke discharging barrel. The driving mechanisms are respectively arranged inside and outside the fan barrel; the cleaning mechanisms are arranged in the fan barrel and on the upper portion of the smoke discharging barrel correspondingly and abut against the driving mechanism. The device can effectively finish smoke exhaust work, can automatically clean the inner wall of the smoke exhaust cylinder in the smoke exhaust process, avoids the situation that the smoke exhaust efficiency is affected by scale deposition on the inner wall, meanwhile guarantees stable operation of all parts, and improves the overall performance and reliability of the fire-fighting smoke exhaust fan.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, specifically a fire smoke exhaust fan. Background Technology

[0002] In the field of fire protection, fire exhaust fans are essential equipment used to remove smoke and provide an escape environment during a fire. They are widely used in densely populated and complex spaces such as large shopping malls, office buildings, and underground parking garages to ensure the smooth evacuation of personnel and the smooth progress of firefighting operations during fire rescue.

[0003] During a fire, smoke often contains a large amount of dust, particulate impurities, and combustion residues. These substances easily adhere to the inner walls of the smoke exhaust duct during the smoke extraction process. Over time, this buildup of grime narrows the exhaust duct, increasing the fan's resistance and significantly reducing its efficiency. Furthermore, existing fire-fighting smoke exhaust fans lack effective automatic cleaning mechanisms, typically requiring regular manual cleaning and maintenance. This not only consumes significant manpower and resources but also makes timely cleaning impossible in emergency fire situations, hindering the continuous and efficient operation of the smoke exhaust fans. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background section, and to propose a fire-fighting smoke exhaust fan. The device disclosed in this invention achieves efficient smoke exhaust and automatic cleaning through the coordinated operation of multiple components.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A fire-fighting smoke exhaust fan includes a mounting frame and a smoke exhaust stack. The smoke exhaust stack is fixedly mounted on the mounting frame, and an air intake grille is provided at the inlet of the smoke exhaust stack. The fan also includes a support frame, a fan casing, a drive mechanism, and a cleaning mechanism. The support frame is fixedly mounted on the inner wall of the smoke exhaust stack. The fan casing is mounted on the support frame and is concentrically arranged with the smoke exhaust stack. The drive mechanism is located both inside and outside the fan casing. The cleaning mechanism is located both inside the fan casing and at the top of the smoke exhaust stack, and abuts against the drive mechanism.

[0007] Preferably, the drive mechanism includes a bearing housing, a rotating shaft, a drive motor, and fan blades. The bearing housing is fixedly installed inside the fan casing. The rotating shaft is rotatably disposed on the bearing housing and the wall of the fan casing, with one end extending to the outside of the fan casing. The drive motor is fixedly installed inside the fan casing and fixedly connected to the other end of the rotating shaft. Several fan blades are respectively fixedly disposed on the extension portion of the rotating shaft.

[0008] Preferably, the cleaning mechanism includes eccentric wheels, springs, pushing members, a pushing assembly, and an air outlet assembly. Several eccentric wheels are respectively disposed on the outer side of the outer wall of the rotating shaft and located inside the fan casing. One end of several springs is installed inside the fan casing and corresponds to the position of the several eccentric wheels. Several pushing members are respectively fixedly disposed on the other end of several springs and abut against the outer edge of several eccentric wheels. The pushing assembly is installed on the exhaust stack and connected to the fan casing. The air outlet assembly is disposed on the inner wall of the exhaust stack.

[0009] Preferably, limit baffles are fixedly provided at both ends of several of the pushing members.

[0010] Preferably, the pushing assembly includes an air inlet cylinder, insert rods, and pistons. One end of each of the air inlet cylinders is connected to the inner wall of the exhaust pipe, and the other end is connected to the fan cylinder. Each air inlet cylinder has an air inlet and an air outlet. One end of each of the insert rods is fixedly mounted on the pushing member and is movably inserted into the interior of the air inlet cylinder. The pistons are respectively installed on the other end of the insert rods.

[0011] Preferably, the actuation assembly further includes a one-way valve, and a plurality of the one-way valves are respectively installed on the air inlet and air outlet of the air inlet cylinder;

[0012] Preferably, the exhaust assembly includes an annular tube and a high-pressure nozzle. The annular tube is attached to the inner wall of the exhaust stack and is composed of multiple arc-shaped tubes, which are respectively connected to the exhaust ports of several air inlets. The exhaust assembly includes a high-pressure nozzle, and several high-pressure nozzles are respectively arranged on the annular tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model discloses a device that achieves efficient smoke extraction and automatic cleaning through the coordinated operation of multiple components. A drive motor rotates the shaft and fan blades, generating suction to draw smoke into the exhaust pipe and expel it. The fan casing protects the drive source from high temperatures. As the shaft rotates, the eccentric wheel rotates accordingly, compressing the spring and causing the pushing member to reciprocate. The pushing member drives the insert rod and piston to move within the air intake cylinder. A one-way valve controls the gas flow, pushing external gas into an annular pipe composed of multiple arc-shaped tubes that fit against the inner wall of the exhaust pipe. The gas converges and is pressurized within the annular pipe before being ejected at high pressure through a high-pressure nozzle, impacting the inner wall of the exhaust pipe and removing dust and impurities.

[0015] This device can effectively complete the smoke exhaust work and can also automatically clean the inner wall of the smoke exhaust pipe during the smoke exhaust process, so as to avoid the smoke exhaust efficiency being affected by the accumulation of dirt on the inner wall. At the same time, it ensures the stable operation of each component and improves the overall performance and reliability of the fire smoke exhaust fan. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the axial side structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the front sectional view of the present invention;

[0019] Figure 4 This is an enlarged schematic diagram of the spring structure of this utility model;

[0020] Figure 5 This is an enlarged schematic diagram of the limiting baffle of this utility model.

[0021] The components include: 1. Mounting bracket; 2. Exhaust duct; 3. Support frame; 4. Fan duct; 5. Bearing housing; 6. Shaft; 7. Drive motor; 8. Fan blade; 9. Eccentric wheel; 10. Spring; 11. Pushing component; 12. Limiting baffle; 13. Air inlet; 14. One-way valve; 15. Insert rod; 16. Piston; 17. Annular tube; 18. High-pressure nozzle. Detailed Implementation

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] like Figures 1-5 As shown, this utility model provides a technical solution: a fire-fighting smoke exhaust fan, comprising: a mounting frame 1, a smoke exhaust duct 2, a support frame 3, a fan duct 4, a drive mechanism, and a cleaning mechanism. The smoke exhaust duct 2 is fixedly mounted on the mounting frame 1, and an air intake grille is also fixedly mounted at the inlet of the smoke exhaust duct 2. The support frame 3 is fixedly mounted on the inner wall of the smoke exhaust duct 2. The fan duct 4 is mounted on the support frame and is concentrically arranged with the smoke exhaust duct 2. The drive mechanism is respectively located inside and outside the fan duct 4. The cleaning mechanism is respectively located inside the fan duct 4 and on the smoke exhaust duct 2, and abuts against the drive mechanism.

[0024] It should be noted that when the fire exhaust fan starts, the drive mechanism begins to rotate, driving the airflow within the fan casing 4, thereby generating suction to draw smoke through the air intake grille at the inlet of the exhaust casing 2 into the exhaust casing 2. Subsequently, the smoke is discharged through the pipe under the action of the drive mechanism. Since the fan casing 4 is installed on the support frame 3 on the inner wall of the exhaust casing 2 and is concentrically positioned with the exhaust casing 2, it can protect the drive mechanism located both inside and outside, effectively blocking the high temperatures generated during smoke exhaust and preventing the high temperatures from affecting the drive source. During the continuous smoke exhaust process, the cleaning mechanism contacts the drive mechanism. As the drive mechanism rotates, during the intervals between contact, the drive mechanism drives the cleaning mechanism to clean the dust and debris adhering to the inner wall of the exhaust casing 2, maintaining the cleanliness of the inner wall of the exhaust casing 2, ensuring the smooth flow of the smoke exhaust channel, and enabling efficient and stable smoke exhaust operations.

[0025] In some examples, the drive mechanism includes: a bearing housing 5, a rotating shaft 6, a drive motor 7, and fan blades 8. The bearing housing 5 is fixedly installed inside the fan casing 4. The rotating shaft 6 is rotatably disposed on the bearing housing 5 and the wall of the fan casing 4, and one end extends to the outside of the fan casing 4. The drive motor 7 is fixedly installed inside the fan casing 4 and is fixedly connected to the other end of the rotating shaft 6. Several fan blades 8 are respectively fixedly disposed on the extension of the rotating shaft 6.

[0026] It should be noted that when the fire exhaust fan starts working, the drive motor 7, which is fixedly installed inside the fan casing 4, starts, and the drive motor 7 drives the rotating shaft 6, which is fixedly connected to it, to rotate. As the rotating shaft 6 rotates, several fan blades 8, which are fixedly installed in its extension, begin to rotate at high speed. The rotation of the fan blades 8 generates suction, which draws outside smoke into the smoke exhaust casing 2 through the inlet of the smoke exhaust casing 2, and causes the smoke to flow in the smoke exhaust casing 2, and finally discharge it through the pipe, thus realizing the fire exhaust function.

[0027] In some examples, the cleaning mechanism includes: an eccentric wheel 9, a spring 10, a pusher 11, a pusher assembly, and an exhaust assembly. Several eccentric wheels 9 are respectively disposed on the outer side of the outer wall of the rotating shaft 6 and located inside the fan cylinder 4; one end of several springs 10 is installed inside the fan cylinder 4 and corresponds to the position of several eccentric wheels 9; several pushers 11 are respectively fixedly disposed on the other end of several springs 10 and abut against the outer edge of several eccentric wheels 9; the pusher assembly is installed on the exhaust pipe 2 and connected to the fan cylinder 4; the exhaust assembly is disposed on the inner wall of the exhaust pipe 2.

[0028] It should be noted that when the fire exhaust fan is running, the rotating shaft 6 begins to rotate, and several eccentric wheels 9, fixed to the outer side of the rotating shaft 6 and located inside the fan casing 4, rotate synchronously. During the rotation, the outer edge of the eccentric wheel 9 continuously contacts the pushing member 11. Due to the eccentric structure of the eccentric wheel 9, it continuously compresses the spring 10 corresponding to its position during rotation, causing the spring 10 to undergo elastic deformation, while simultaneously pushing the pushing member 11 to reciprocate. The movement of the pushing member 11 drives the connected pushing component to work. During the smoke exhaust process, the pushing component pushes the external gas to the air outlet component on the inner wall of the smoke exhaust casing 2, where it is discharged in the form of high pressure. The high-pressure gas acts on the inner wall of the smoke exhaust casing 2, blowing off dust, impurities, and other debris adhering to the inner wall of the smoke exhaust casing 2, thereby cleaning the inner wall of the smoke exhaust casing 2, ensuring the unobstructed smoke exhaust channel, and improving the working efficiency and stability of the smoke exhaust fan.

[0029] In some examples, limit baffles 12 are fixedly installed at both ends of several pushing members 11. The limit baffles 12 can limit the range of motion of the pushing members 11, prevent them from moving excessively under the action of the spring 10 and the eccentric wheel 9, ensure that the pushing members 11 reciprocate within the specified stroke, ensure the stability and reliability of the cleaning mechanism, and avoid collisions with other components or separation from the normal contact with the eccentric wheel 9 due to excessive range of motion of the pushing members 11, which would affect the normal operation of the cleaning mechanism.

[0030] In some examples, the actuating assembly includes: an air inlet cylinder 13, a one-way valve 14, a plug rod 15, and a piston 16. One end of several air inlets 13 is connected to the inner wall of the exhaust pipe 2, and the other end is connected to the fan pipe 4. Each air inlet cylinder 13 has an air inlet and an air outlet. Several one-way valves 14 are respectively installed on the air inlet and air outlet of the air inlet cylinder 13. One end of several plug rods 15 is fixedly mounted on the pusher 11 and is movably inserted into the interior of the air inlet cylinder 13. Several pistons 16 are respectively installed on the other end of the plug rods 15.

[0031] It should be noted that when the fire exhaust fan is running, the rotating shaft 6 drives the eccentric wheel 9 to rotate. The eccentric wheel 9 compresses the spring 10, causing the pusher 11 to reciprocate. The insert rod 15, which is fixedly connected to the pusher 11, reciprocates within the air intake cylinder 13. When the insert rod 15 drives the piston 16 to move outward, the spring 10 is compressed, causing the gas in the air intake cylinder 13 to be pushed through the outlet to the exhaust assembly on the inner wall of the exhaust stack 2. When the insert rod 15 drives the piston 16 to move inward under the reset action of the spring 10, the one-way valve 14 of the air intake opens, allowing external gas to enter the air intake cylinder 13. As the eccentric wheel 9 rotates, the insert rod 15 continuously reciprocates within the air intake cylinder 13. The insert rod 15 and piston 16 continuously push the gas in and out of the air intake cylinder 13. Through the control of the one-way valve 14, the gas is continuously and stably pushed to the exhaust assembly and discharged in high pressure, thereby achieving the purpose of cleaning the inner wall of the exhaust stack 2.

[0032] In some examples, the exhaust assembly includes an annular pipe 17 and high-pressure nozzles 18. The annular pipe 17 is attached to the inner wall of the exhaust stack 2. The annular pipe 17 is composed of multiple arc-shaped pipes and is connected to the exhaust ports of several air inlets 13 respectively. Several high-pressure nozzles 18 are respectively arranged on the annular pipe 17.

[0033] It should be noted that when the fire exhaust fan is running, the push rod 15 in the push assembly drives the piston 16 to reciprocate within the air intake cylinder 13, pushing the gas out through the air outlet of the air intake cylinder 13. Since the annular pipe 17 is attached to the inner wall of the exhaust stack 2 and consists of multiple arc-shaped pipes connected to the air outlets of several air intake cylinders 13, the gas discharged from the air intake cylinder 13 quickly enters the annular pipe 17. The gas converges and flows within the annular pipe 17, and as gas is continuously input, the gas pressure within the annular pipe 17 gradually increases. Several high-pressure nozzles 18 arranged on the annular pipe 17 then eject the pressurized gas from the annular pipe 17 at high pressure and high speed. The high-pressure gas is sprayed onto the inner wall of the exhaust stack 2, effectively impacting and blowing away dust, impurities, etc., adhering to the inner wall of the exhaust stack, thereby cleaning the inner wall of the exhaust stack and ensuring the unobstructed flow of the exhaust channel.

[0034] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The above description represents the preferred operating mode of this utility model. The specific operating mode description is only for better understanding the concept of this utility model. For those skilled in the art, several improvements or equivalent substitutions can be made based on the principles of this utility model, and these improvements or equivalent substitutions are also considered to fall within the protection scope of this utility model.

Claims

1. A fire smoke exhaust fan, comprising a mounting frame (1) and a smoke exhaust duct (2), the smoke exhaust duct (2) is fixedly arranged on the mounting frame (1), and an air inlet grille is arranged at the air inlet of the smoke exhaust duct (2), characterized in that: It also includes support frame (3), fan cylinder (4), drive mechanism and cleaning mechanism, the support frame (3) is fixedly arranged on the inner wall of the smoke exhaust cylinder (2);The fan cylinder (4) is installed on the support frame (3), and is concentrically arranged with the smoke exhaust cylinder (2);The drive mechanism is respectively arranged in the inside and outside of the fan cylinder (4);The cleaning mechanism is respectively arranged in the inside of the fan cylinder (4) and the upper part of the smoke exhaust cylinder (2), and is in abutment with the drive mechanism.

2. A fire smoke exhaust fan as claimed in claim 1, wherein: The drive mechanism includes bearing seat (5), rotating shaft (6), drive motor (7) and fan blade (8), the bearing seat (5) is fixedly installed in the inside of the fan cylinder (4);The rotating shaft (6) is rotatably arranged in the bearing seat (5) and the wall surface of the fan cylinder (4), and one end extends to the outside of the fan cylinder (4);The drive motor (7) is fixedly installed in the inside of the fan cylinder (4), and is fixedly connected with the other end of the rotating shaft (6);A plurality of fan blades (8) are respectively fixedly arranged on the extended part of the rotating shaft (6).

3. The fire smoke exhaust fan of claim 1, wherein: The cleaning mechanism includes eccentric wheel (9), spring (10), push piece (11), push assembly and air outlet assembly, a plurality of eccentric wheels (9) are respectively arranged on the outer wall of the rotating shaft (6) and located in the inside of the fan cylinder (4);One end of a plurality of springs (10) is installed in the inside of the fan cylinder (4), and corresponds to the position of a plurality of eccentric wheels (9);A plurality of push pieces (11) are respectively fixedly arranged on the other end of a plurality of springs (10), and are in abutment with the outer edge part of a plurality of eccentric wheels (9);The push assembly is installed on the smoke exhaust cylinder (2), and is connected with the fan cylinder (4);The air outlet assembly is arranged on the inner side wall of the smoke exhaust cylinder (2).

4. A smoke exhaust fan as claimed in claim 3, characterised in that: Two ends of a plurality of push pieces (11) are respectively fixedly provided with limit baffle (12).

5. The fire smoke exhaust fan of claim 3, wherein: The push assembly includes air inlet cylinder (13), plug rod (15) and piston (16), one end of a plurality of air inlet cylinders (13) is connected to the inner wall of the smoke exhaust cylinder (2), and the other end is communicated with the fan cylinder (4), and air inlet and air outlet are formed in each air inlet cylinder (13);One end of a plurality of plug rods (15) is fixedly arranged on the push piece (11), and is movably inserted into the inside of the air inlet cylinder (13);A plurality of pistons (16) are respectively installed on the other end of the plug rod (15).

6. A smoke extraction fan for fire fighting according to claim 5, characterised in that: The push assembly further includes one-way valve (14), a plurality of one-way valves (14) are respectively installed on the air inlet and air outlet of the air inlet cylinder (13).

7. A fire smoke exhaust fan as claimed in claim 5, wherein: The air outlet assembly includes annular pipe (17) and high pressure nozzle (18), the annular pipe (17) is attached to the inner wall of the smoke exhaust cylinder (2), the annular pipe (17) is composed of a plurality of arc pipes, and is respectively communicated with a plurality of air outlets of the air inlet cylinder (13);The air outlet assembly includes high pressure nozzle (18), a plurality of high pressure nozzles (18) are arranged on the annular pipe (17).

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