Fire safety air dust detection device and method thereof

Abstract

This invention discloses an air dust detection device and method for fire safety, relating to the technical field of air dust detection devices for fire protection. The device's main body contains a drive mechanism, with an air intake mechanism connected to its right end. The air intake mechanism includes turbine blades, a turbine housing on the outside of the turbine blades, a protective net at the bottom of the turbine housing, and scrapers at the bottom of the turbine blades. A detection mechanism is connected to the left end of the turbine housing, including a detection tube. A visual camera and a laser emitter are located at the top of the detection tube, and a laser receiver is located at the bottom of the detection tube. A concentration detector is connected to the left end of the detection tube, and an outlet pipe is located at the left end of the concentration detector. The drive mechanism simultaneously drives the air intake mechanism and the drive gear, causing the turbine housing in the air intake mechanism to transmit dense smoke gas to the detection tube. The visual camera and laser emitter then detect dust in the gas, making the device more accurate in detecting dense smoke gas.

Description

Technical Field

[0001] This invention relates to the technical field of air dust detection devices for fire protection, specifically to an air dust detection device and method for fire safety. Background Technology

[0002] Fire safety air dust detection devices are a type of fire monitoring equipment used to monitor the concentration of dust in the air in real time, in order to prevent dust explosions and assist in emergency rescue operations such as fires. They are commonly used in scenarios such as factories and mines where dust levels are prone to exceed standards and pose fire hazards. They are key equipment in fire safety protection systems. However, existing fire safety air dust detection devices have some shortcomings, such as:

[0003] Application No. CN202410189451.8 discloses an air dust concentration detection device and method. This device can effectively prevent the laser emitter and laser receiver from being contaminated by dust in the air, and can also prevent dust in the air from adhering to the inner walls of the air inlet and outlet pipes, thus effectively ensuring the detection accuracy of dust concentration. However, in the process of flue gas detection, this device is difficult to detect flue gas in different areas, which may lead to problems with the detection accuracy of the device when detecting flue gas.

[0004] Therefore, we propose an air dust detection device and method for fire safety to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an air dust detection device and method for fire safety, in order to solve the problem mentioned in the background art that current air dust detection devices for fire safety on the market are difficult to detect smoke in different areas, which may lead to problems with the detection accuracy of the device when detecting smoke.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an air dust detection device for fire safety, comprising a device body and an audible and visual alarm installed at the bottom of the device body;

[0007] The main body of the device is equipped with a drive mechanism, and the right end of the drive mechanism is connected to an air intake mechanism. The air intake mechanism includes a turbine fan blade. The turbine fan blade is equipped with a turbine housing on its outer side, and a protective net is provided at the bottom of the turbine housing. The turbine fan blade is equipped with a scraper at the bottom, and the scraper is attached to the protective net.

[0008] A detection mechanism is connected to the left end of the turbine housing. The detection mechanism includes a detection tube, and a visual camera and a laser emitter are provided at the top of the detection tube. A laser receiver is provided at the bottom of the detection tube. A concentration detector is connected to the left end of the detection tube, and an exhaust pipe is provided at the left end of the concentration detector. A filter box is provided at the front end of the exhaust pipe.

[0009] The drive mechanism simultaneously drives the intake mechanism and the drive gear, which in turn causes the turbine housing in the intake mechanism to transmit the dense smoke gas to the detection tube. The dust in the gas is detected by a visual camera and a laser emitter, and then the dust in the gas is detected again by a concentration detector. This makes the device more accurate in detecting dense smoke gas, and it can also issue an alarm through an audible and visual alarm.

[0010] As a preferred embodiment of the present invention, the main body of the device is provided with a remote connector, which is connected to the visual camera and laser receiver circuit inside the detection tube, and is also connected to the concentration detector circuit.

[0011] The above technical solution enables remote connectors to achieve remote control and data transmission of equipment. Operators can issue detection commands in a safe area, avoiding close contact with dense smoke environments, and transmit the image data from the visual camera and the detection results from the concentration detector in real time, facilitating remote real-time monitoring.

[0012] As a preferred technical solution of the present invention, the main body of the device is fixedly connected to the drive mechanism, and the drive mechanism includes a drive motor, and the drive end of the drive motor is connected to a first sprocket. A chain is provided on the outside of the first sprocket, and a second sprocket is engaged at the other end of the chain. A drive shaft is connected to the right end of the second sprocket, and a first bevel gear set is provided on the outside of the drive shaft. The bottom of the first bevel gear set is fixedly connected to the turbine fan blade.

[0013] The above technical solution enables the drive mechanism to simultaneously drive the intake mechanism, exhaust fan blades, and auger shaft, thereby making the equipment more stable when detecting dense smoke gas and increasing the stability of the equipment during operation.

[0014] As a preferred embodiment of the present invention, the top of the turbine blade is rotatably connected to the turbine housing, and the bottom of the turbine housing is fixedly connected to the protective net. A protective cover is installed at the bottom of the turbine housing, and the protective cover is located outside the protective net for protection.

[0015] The above technical solution enables the turbine blades to rotate and connect with the turbine housing, ensuring smooth air intake. The turbine housing's flow-guiding design directs the gas into the detection mechanism. The protective net blocks large particles of foreign matter, preventing blockage of the detection mechanism. The protective cover further protects the protective net, preventing water vapor and corrosive gas erosion. The scraper blades rotate in close contact with the protective net, removing impurities adhering to the net surface in real time.

[0016] As a preferred technical solution of the present invention, the bottom of the main body of the device is fixedly connected to the protective cover, and the right end of the first sprocket is provided with a second bevel gear set, and the bottom of the second bevel gear set is provided with a third bevel gear set. The right end of the third bevel gear set is provided with an exhaust fan blade, and the right end of the exhaust fan blade is provided with an auger shaft. The exhaust fan blade and the auger shaft are located inside the exhaust pipe.

[0017] The above technical solution enables the second and third bevel gear sets to achieve secondary power steering and diversion, driving the exhaust fan blades and auger shaft to run synchronously. The exhaust fan blades can drive the transmission of flue gas, accelerate the discharge of gas after detection, and avoid gas stagnation affecting detection accuracy.

[0018] As a preferred embodiment of the present invention, the air outlet pipe is connected to the filter box pipe, and the front end of the filter box is provided with an air outlet. The detection pipe and the concentration detector are electrically connected to the audible and visual alarm.

[0019] The above technical solution enables the filter box to purify the detected gas, avoiding environmental pollution; the directional design of the gas outlet prevents the backflow of purified gas; the dual threshold judgment of the detection tube and the concentration detector triggers the audible and visual alarm to respond quickly, promptly reminding operators to take fire-fighting measures and prevent the accident from escalating.

[0020] As a preferred technical solution of the present invention, the bottom of the device body is fixedly connected to the sound and light alarm, and the top of the second bevel gear set is provided with a rotating shaft, and the top of the rotating shaft is provided with a driving gear. The outer side of the driving gear is provided with a driven gear, and the bottom of the driven gear is rotatably connected to the device body. The outer sides of the driving gear and the driven gear are slidably connected with sliding tooth grooves.

[0021] The above technical solution enables the meshing transmission between the driving gear and the driven gear, which drives the sliding tooth groove to move laterally. This allows for adjustment of the air intake direction of the air intake mechanism, enabling the detection of flue gas in different areas and overcoming the limitations of single-area detection. The stable characteristics of gear transmission ensure precise adjustment, making it suitable for the detection needs of large-area scenarios such as factories and mines, and increasing the accuracy of the equipment in detecting dust in dense smoke.

[0022] As a preferred technical solution of the present invention, the top of the rotating shaft is provided with a telescopic shaft, and the top of the telescopic shaft is provided with a square protrusion. The top of the telescopic shaft is slidably connected to a bearing ring. The left end of the bearing ring is provided with an electric push rod, which is fixedly connected to the main body of the device. The bottom of the drive gear is provided with a groove, which is rotatably connected to the main body of the device, and the bottom of the groove is engaged with the square protrusion.

[0023] The above technical solution enables the electric push rod to drive the telescopic shaft to extend and retract, achieving precise engagement or disengagement of the square convex rod and the convex groove. The gear transmission mechanism can be started and stopped independently. The bearing ring supports the telescopic shaft, reducing swaying during extension and retraction and ensuring reliable engagement. The rigid fit between the square convex rod and the convex groove ensures efficient power transmission, stable directional adjustment, and improved accuracy of detection in different areas.

[0024] As a preferred embodiment of the present invention, a method for a fire safety air dust detection device includes the following steps:

[0025] Step 1: The external controller sends a signal to the remote connector inside the device body, which causes the drive mechanism inside the device body to operate. The drive mechanism drives the air intake mechanism, which in turn causes the turbine fan blades to rotate inside the turbine housing. At the same time, the turbine fan blades also drive the scraper blades to rotate, which causes the scraper blades to fit against the protective net, thereby preventing the protective net from being blocked by foreign objects. The turbine housing then transmits the dense smoke gas to the detection mechanism for detection.

[0026] Step 2: When the turbine housing transmits the gas to the detection mechanism, the laser emitter inside the detection tube emits a laser towards the laser receiver. The dense smoke gas also passes through the laser as it flows, allowing the visual camera to record the image. Subsequently, the gas is transmitted to the concentration detector for smoke concentration detection. At the same time, the drive mechanism also drives the exhaust fan blades and auger shaft to rotate, so that the detected dense smoke gas is transmitted to the filter box through the exhaust pipe and then discharged through the exhaust port.

[0027] Step 3: When the gas dust detected by the detection tube and concentration detector exceeds the specified threshold, the detection tube and concentration detector will activate the audible and visual alarm and sound an alarm.

[0028] The above technical solution can reduce on-site personnel operation in the remote control step and improve operational safety. In the air intake detection step, the scraper cleaning the protective net ensures stable air intake, and the dual verification of laser detection and concentration detection avoids the error of a single detection method. In addition, the exhaust alarm step realizes the purification and discharge of gas after detection, and the audible and visual alarms respond quickly, forming a process from remote control to detection and alarm, which is suitable for the fire safety needs of high-risk scenarios.

[0029] Compared with the prior art, the beneficial effects of the present invention are: by driving the intake mechanism and the drive gear at the same time, the turbine housing in the intake mechanism transmits the dense smoke gas to the detection tube, and the dust in the gas is detected by the visual camera and the laser emitter, and then the dust in the gas is detected again by the concentration detector, so that the device can detect dense smoke gas more accurately, and can also issue an alarm through the sound and light alarm.

[0030] Furthermore, through the configuration of the drive mechanism, the drive mechanism can simultaneously drive the intake mechanism, the exhaust fan blades, and the auger shaft, thereby making the equipment more stable when detecting dense smoke gas and increasing the stability of the equipment during operation.

[0031] Furthermore, by setting up the exhaust fan blades and auger shaft, the second and third bevel gear sets can achieve secondary power steering and diversion, driving the exhaust fan blades and auger shaft to run synchronously. The exhaust fan blades can drive the transmission of flue gas, accelerate the discharge of gas after detection, and avoid gas stagnation affecting detection accuracy. Attached Figure Description

[0032] Figure 1 This is a frontal elevation view of the present invention.

[0033] Figure 2 This is a schematic diagram of the rear elevation structure of the present invention;

[0034] Figure 3 This is a three-dimensional structural schematic diagram of the present invention in frontal cross-section;

[0035] Figure 4 This is a three-dimensional structural schematic diagram of the present invention from a top cross-section;

[0036] Figure 5 This is a three-dimensional structural diagram of the driving mechanism of the present invention;

[0037] Figure 6 This is a cross-sectional three-dimensional structural diagram of the air intake mechanism of the present invention;

[0038] Figure 7 This is a three-dimensional structural schematic diagram of the intake mechanism of the present invention, viewed from top cross-section.

[0039] Figure 8 This is a three-dimensional structural diagram of the detection mechanism of the present invention;

[0040] Figure 9 This is a three-dimensional structural diagram of the driving gear and driven gear of the present invention;

[0041] Figure 10 This is a three-dimensional structural schematic diagram of a front cross-section of Embodiment 2 of the present invention;

[0042] Figure 11 This is a three-dimensional structural diagram of the telescopic shaft and square protruding rod of Embodiment 2 of the present invention.

[0043] In the diagram: 1. Main body of the device; 2. Drive motor; 3. First sprocket; 4. Chain; 5. Second sprocket; 6. Drive shaft; 7. First bevel gear set; 8. Turbine fan blade; 9. Turbine housing; 10. Protective net; 11. Protective cover; 12. Scraper; 13. Detection tube; 14. Visual camera; 15. Laser emitter; 16. Laser receiver; 17. Concentration detector; 18. Exhaust pipe; 19. Exhaust fan blade; 20. Screw shaft; 21. Second bevel gear set; 22. Third bevel gear set; 23. Filter box; 24. Exhaust port; 25. Audible and visual alarm; 26. Remote connector; 27. Rotating shaft; 28. Drive gear; 29. ​​Driven gear; 30. Sliding tooth groove; 31. Telescopic shaft; 32. Square protrusion; 33. Bearing ring; 34. Electric push rod; 35. Groove. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] Example 1: To address the issue that existing fire safety air dust detection devices struggle to detect smoke in different areas, potentially leading to inaccuracies in smoke detection, the following solution is disclosed. Please refer to [link / reference]. Figures 1-9 The present invention provides a technical solution: an air dust detection device for fire safety, comprising a device body 1 and an audible and visual alarm 25 installed at the bottom of the device body 1;

[0046] The main body 1 of the device is equipped with a drive mechanism, and the right end of the drive mechanism is connected to an air intake mechanism. The air intake mechanism includes a turbine fan blade 8. The turbine fan blade 8 is equipped with a turbine housing 9 on its outer side, and a protective net 10 is provided at the bottom of the turbine housing 9. The turbine fan blade 8 is equipped with a scraper 12 at its bottom, and the scraper 12 is attached to the protective net 10.

[0047] The turbine housing 9 is connected to a detection mechanism at its left end, and the detection mechanism includes a detection tube 13. The top of the detection tube 13 is equipped with a visual camera 14 and a laser emitter 15. The bottom of the detection tube 13 is equipped with a laser receiver 16. The left end of the detection tube 13 is connected to a concentration detector 17. The left end of the concentration detector 17 is equipped with an exhaust pipe 18. The front end of the exhaust pipe 18 is equipped with a filter box 23.

[0048] The main body 1 of the device is equipped with a remote connector 26, which is connected to the visual camera 14 and laser receiver 16 inside the detection tube 13, and is also connected to the concentration detector 17.

[0049] The main body 1 of the device is fixedly connected to the drive mechanism, and the drive mechanism includes a drive motor 2. The drive end of the drive motor 2 is connected to a first sprocket 3. A chain 4 is provided on the outside of the first sprocket 3, and a second sprocket 5 is engaged at the other end of the chain 4. A drive shaft 6 is connected to the right end of the second sprocket 5, and a first bevel gear set 7 is provided on the outside of the drive shaft 6. The bottom of the first bevel gear set 7 is fixedly connected to the turbine fan blade 8.

[0050] The top of the turbine blade 8 is rotatably connected to the turbine housing 9, and the bottom of the turbine housing 9 is fixedly connected to the protective net 10. A protective cover 11 is installed at the bottom of the turbine housing 9, and the protective cover 11 is located outside the protective net 10 for protection.

[0051] The bottom of the main body 1 is fixedly connected to the protective cover 11, and the right end of the first sprocket 3 is provided with a second bevel gear set 21, and the bottom of the second bevel gear set 21 is provided with a third bevel gear set 22. The right end of the third bevel gear set 22 is provided with an exhaust fan blade 19, and the right end of the exhaust fan blade 19 is provided with an auger shaft 20. The exhaust fan blade 19 and the auger shaft 20 are located inside the exhaust pipe 18.

[0052] The air outlet pipe 18 is connected to the filter box 23, and the filter box 23 is provided with an air outlet 24 at the front end. The detection pipe 13 and the concentration detector 17 are electrically connected to the audible and visual alarm 25.

[0053] The bottom of the device body 1 is fixedly connected to the sound and light alarm 25, and the top of the second bevel gear set 21 is provided with a rotating shaft 27, and the top of the rotating shaft 27 is provided with a driving gear 28. The outer side of the driving gear 28 is provided with a driven gear 29, and the bottom of the driven gear 29 is rotatably connected to the device body 1. The outer sides of the driving gear 28 and the driven gear 29 are slidably connected with sliding tooth grooves 30.

[0054] A method for using an air dust detection device for fire safety includes the following steps:

[0055] Step 1: The external controller sends a signal to the remote connector 26 inside the main body 1 of the device, thereby causing the drive mechanism inside the main body 1 to operate. The drive mechanism drives the air intake mechanism to operate, thereby causing the turbine fan blade 8 to rotate inside the turbine housing 9. At the same time, the turbine fan blade 8 also drives the scraper 12 to rotate, thereby causing the scraper 12 to adhere to the protective net 10, thereby preventing the protective net 10 from being blocked by foreign objects, and allowing the turbine housing 9 to transmit the dense smoke gas to the detection mechanism for detection.

[0056] Step 2: When the turbine housing 9 transmits the gas to the detection mechanism, the laser emitter 15 inside the detection tube 13 will emit a laser towards the laser receiver 16. The dense smoke gas will also pass through the laser as it flows, so that the visual camera 14 will record the image. Then the gas will be transmitted to the concentration detector 17 for smoke concentration detection. At the same time, the drive mechanism will also drive the exhaust fan blade 19 and the auger shaft 20 to rotate, so that the detected dense smoke gas will be transmitted to the filter box 23 through the exhaust pipe 18 and then discharged through the exhaust port 24.

[0057] Step 3: When the gas dust detected by the detection tube 13 and the concentration detector 17 exceeds the specified threshold, the detection tube 13 and the concentration detector 17 will activate the audible and visual alarm 25 to sound an alarm.

[0058] When the drive mechanism is running, the drive motor 2 drives the first sprocket 3 to rotate, which in turn drives the second sprocket 5 to rotate via the chain 4. The second sprocket 5 drives the drive shaft 6 to rotate, which in turn drives the first bevel gear set 7 to rotate. The first bevel gear set 7 then drives the turbine fan blade 8 and the scraper blade 12 to rotate. The scraper blade 12 scrapes the surface of the protective net 10 to prevent the protective net 10 from becoming clogged. The first sprocket 3 also rotates via the second bevel gear set 21, which in turn drives the third bevel gear set 22, the exhaust fan blade 19, and the auger shaft 20 to rotate. This allows the gas inside the detection tube 13 and the concentration detector 17 to enter the filter box 23 through the exhaust fan blade 19 and the auger shaft 20, and then be discharged through the exhaust port 24.

[0059] When the device is in operation, it can transmit commands through the remote connector 26 to drive the drive mechanism or vision camera 14, and the remote connector 26 can also transmit data to other remotely connected devices.

[0060] Example 2: This example discloses another method of movement, which differs from Example 1, as follows: Figures 10-11 As shown, the difference between this embodiment and embodiment 1 is that: the top of the rotating shaft 27 is provided with a telescopic shaft 31, and the top of the telescopic shaft 31 is provided with a square protrusion 32, and the top of the telescopic shaft 31 is slidably connected to a bearing ring 33. The left end of the bearing ring 33 is provided with an electric push rod 34, and the electric push rod 34 is fixedly connected to the main body 1 of the device. The bottom of the drive gear 28 is provided with a groove 35, and the groove 35 is rotatably connected to the main body 1 of the device. The bottom of the groove 35 is engaged with the square protrusion 32.

[0061] When the main body 1 of the device moves, the electric push rod 34 can drive the telescopic shaft 31 to drive the square protrusion 32 to rise and fall, so that the square protrusion 32 is engaged with the groove 35. Thus, when the drive motor 2 drives the second bevel gear set 21 to rotate, the second bevel gear set 21 will also drive the drive gear 28 to rotate, so that the drive gear 28 and the driven gear 29 rotate in the sliding tooth groove 30, causing the main body 1 of the device to move along the sliding tooth groove 30.

[0062] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fire safety air dust detection device, comprising a device body (1) and an audible and visual alarm (25) installed at the bottom of the device body (1). Its features are: The main body (1) of the device is provided with a drive mechanism inside, and the right end of the drive mechanism is connected to an air intake mechanism. The air intake mechanism includes a turbine fan blade (8). The turbine fan blade (8) is provided with a turbine housing (9) on the outside. The turbine housing (9) is provided with a protective net (10) at the bottom. The turbine fan blade (8) is provided with a scraper (12) at the bottom. The scraper (12) is attached to the protective net (10). The turbine housing (9) is connected to a detection mechanism at its left end. The detection mechanism includes a detection tube (13), and the top of the detection tube (13) is provided with a visual camera (14) and a laser emitter (15). The bottom of the detection tube (13) is provided with a laser receiver (16). The left end of the detection tube (13) is connected to a concentration detector (17), and the left end of the concentration detector (17) is provided with an exhaust pipe (18). The front end of the exhaust pipe (18) is provided with a filter box (23).

2. The air dust detection device for fire safety according to claim 1, characterized in that, The device body (1) is provided with a remote connector (26) inside, and the remote connector (26) is connected to the visual camera (14) and laser receiver (16) inside the detection tube (13) and is also connected to the concentration detector (17).

3. The air dust detection device for fire safety according to claim 2, characterized in that, The main body (1) of the device is fixedly connected to the drive mechanism, and the drive mechanism includes a drive motor (2). The drive end of the drive motor (2) is connected to a first sprocket (3). A chain (4) is provided on the outside of the first sprocket (3), and a second sprocket (5) is meshed on the other end of the chain (4). A drive shaft (6) is connected to the right end of the second sprocket (5), and a first bevel gear set (7) is provided on the outside of the drive shaft (6). The bottom of the first bevel gear set (7) is fixedly connected to the turbine fan blade (8).

4. The air dust detection device for fire safety according to claim 3, characterized in that, The top of the turbine blade (8) is rotatably connected to the turbine housing (9), and the bottom of the turbine housing (9) is fixedly connected to the protective net (10). A protective cover (11) is installed at the bottom of the turbine housing (9), and the protective cover (11) is located outside the protective net (10) for protection.

5. The air dust detection device for fire safety according to claim 4, characterized in that, The bottom of the main body (1) of the device is fixedly connected to the cover (11), and the right end of the first sprocket (3) is provided with a second bevel gear group (21), and the bottom of the second bevel gear group (21) is provided with a third bevel gear group (22). The right end of the third bevel gear group (22) is provided with an exhaust fan blade (19), and the right end of the exhaust fan blade (19) is provided with an auger shaft (20). The exhaust fan blade (19) and the auger shaft (20) are located inside the exhaust pipe (18).

6. The air dust detection device for fire safety according to claim 5, characterized in that, The air outlet pipe (18) is connected to the filter box (23) and the filter box (23) has an air outlet (24) at the front end. The detection pipe (13) and the concentration detector (17) are electrically connected to the audible and visual alarm (25).

7. The air dust detection device for fire safety according to claim 6, characterized in that, The bottom of the main body (1) of the device is fixedly connected to the sound and light alarm (25), and the top of the second bevel gear set (21) is provided with a rotating shaft (27), and the top of the rotating shaft (27) is provided with a driving gear (28). The outer side of the driving gear (28) is provided with a driven gear (29), and the bottom of the driven gear (29) is rotatably connected to the main body (1) of the device. The outer sides of the driving gear (28) and the driven gear (29) are slidably connected with sliding tooth grooves (30).

8. The air dust detection device for fire safety according to claim 7, characterized in that, The rotating shaft (27) is provided with a telescopic shaft (31) at the top, and the telescopic shaft (31) is provided with a square protrusion (32) at the top. The top of the telescopic shaft (31) is slidably connected to a bearing ring (33). The left end of the bearing ring (33) is provided with an electric push rod (34), and the electric push rod (34) is fixedly connected to the main body of the device (1). The bottom of the drive gear (28) is provided with a groove (35), and the groove (35) is rotatably connected to the main body of the device (1). The bottom of the groove (35) is engaged with the square protrusion (32).

9. A method for using an air dust detection device for fire safety, comprising the air dust detection device for fire safety as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The external controller sends a signal to the remote connector (26) inside the main body (1) of the device, thereby causing the drive mechanism inside the main body (1) to run, which in turn drives the intake mechanism to run, thereby causing the turbine fan blade (8) to rotate inside the turbine housing (9). At the same time, the turbine fan blade (8) also drives the scraper (12) to rotate, thereby causing the scraper (12) to adhere to the protective net (10), thus preventing the protective net (10) from being blocked by foreign objects, and causing the turbine housing (9) to transmit the dense smoke gas to the detection mechanism for detection. Step 2: When the turbine housing (9) transmits the gas to the detection mechanism, the laser emitter (15) inside the detection tube (13) will emit a laser towards the laser receiver (16), and the dense smoke gas will also pass through the laser when it flows, so that the visual camera (14) records the image. Then the gas will be transmitted to the concentration detector (17) for smoke concentration detection, and at the same time the drive mechanism will drive the exhaust fan blade (19) and the auger shaft (20) to rotate, so that the detected dense smoke gas is transmitted to the filter box (23) through the exhaust pipe (18), and then discharged through the exhaust port (24). Step 3: When the gas dust detected by the detection tube (13) and the concentration detector (17) exceeds the specified threshold, the detection tube (13) and the concentration detector (17) will activate the audible and visual alarm (25) and sound an alarm.

Images