A dust sampling device for occupational health sampling

Abstract

The present invention belongs to the technical field of dust sampling, and discloses a dust sampling device for occupational health sampling, including a dust sampler. A tripod can be tightly clamped at the bottom end of the dust sampler. A sampling head can be threadedly connected to the top end of the dust sampler, and a plurality of dust inlet holes are circumferentially formed on the sampling head. By manually starting the motor on the chassis to drive the screw rod to rotate, the slider and the toothed plate are driven to move synchronously. The moving toothed plate will contact and engage with the teeth, thereby driving the double-layer rotating plate to rotate, driving the pressing baffle to tilt at an angle, so that the rubber pressing plate contacts and presses against the outer wall of the sampling head, producing a strengthening effect. In windy weather, the wind will automatically drive the wind wheel on the cross bar and the top plates on both sides to rotate synchronously, driving the T-shaped pressing plate to perform reciprocating translation up and down, and further driving a plurality of brushes to move reciprocatingly up and down on a plurality of dust inlet holes, so as to continuously clean their surfaces and improve the working efficiency of dust collection and sampling.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust sampling, and specifically relates to a dust sampling device for occupational health sampling. Background Art

[0002] A dust sampler refers to a portable instrument for collecting dust samples in dusty air to measure the dust concentration in the air. Besides the need for safety production management, it also provides a scientific basis for researching dust prevention, reduction, and removal measures. Measuring dust with a dust sampler is a recognized method with relatively high accuracy. It is widely used in health monitoring and evaluation in departments such as disease prevention, environmental monitoring, labor protection, work safety supervision, military, scientific research and teaching, metallurgy, petrochemical industry, railway, building materials, etc. It is specifically used to measure the average dust concentration in the air of the workplace of production teams. For the assessment of indoor air quality in environmental protection standards, an 8-hour sampling time is generally adopted, and the short-term sampling time is 2 hours or 1 hour. These time settings are generally used for the rapid assessment of environmental air quality or the monitoring of special places;

[0003] During the use of a dust sampler for occupational health sampling, it is necessary to avoid strong vibration, collision, and the invasion of dust, rain, and snow. When used outdoors, special attention needs to be paid to the impact of environmental factors on the equipment. If dust sampling is carried out outdoors and there is a relatively severe strong wind weather, relying solely on the connection method of a small section of thread installation between the sampling head and the sampler may not be sufficient to ensure the stable installation of the sampling head for a long time. Moreover, when there is strong wind weather, a kind of particulate impurity contained in the wind may block the dust inlet holes on the sampling head, causing inconvenience to the overall sampling process and thus affecting the occupational health sampling effect. Summary of the Invention

[0004] To solve the problems raised in the above background art, the present invention provides a dust sampling device for occupational health sampling.

[0005] To achieve the above object, the present invention provides the following technical solution: A dust sampling device for occupational health sampling, including a dust sampler. A tripod can be tightly clamped at the bottom end of the dust sampler. A sampling head can be threadedly connected inside the top end of the dust sampler. A plurality of dust inlet holes are circumferentially formed on the sampling head. A reinforcement sampling part is provided on the outer wall of the top end of the dust sampler. The reinforcement sampling part includes a chassis fixedly connected to the outer wall of the top end of the dust sampler. A clamping structure for reinforcing and limiting the sampling head is provided on the chassis. A rotating structure with driving ability is further provided on one side of the top end of the chassis. A cleaning structure for cleaning each dust inlet hole is provided on the rotating structure;

[0006] Among them, there are three T-shaped round rods in the clamping structure. The bottom ends of the three T-shaped round rods are fixedly connected to the outer wall of the top end of the chassis. A pressing railing is movably sleeved on each of the three T-shaped round rods, and a rubber pressing plate is fixedly connected to the outer wall of one end of each of the three pressing railings. The other ends of the three rubber pressing plates can be intermittently and tightly attached to the outer wall of the sampling head.

[0007] Among them, the cleaning structure includes a vertical cylinder rod. A horizontal plate ring is fixedly connected to the vertical cylinder rod near the top. A plurality of brushes are fixedly connected to the inner wall of the horizontal plate ring in a surrounding manner. Each brush can be intermittently attached to and slidably connected with the sampling head and a plurality of dust inlet holes.

[0008] Preferably, the clamping structure specifically further includes a double-layer rotating plate rotatably and fittingly connected to the outer wall of the top end of the chassis. Three partition plates are fixedly connected to the double-layer rotating plate in a surrounding manner. A square groove plate is slidably and fittingly connected to each of the three pressing railings.

[0009] Preferably, the outer walls of the three square groove plates can be slidably and fittingly connected to the inner wall of the double-layer rotating plate. A T-shaped shaft is fixedly connected to the outer wall of the top end of each of the three T-shaped shafts. Each of the three T-shaped shafts is also rotatably connected through one end of the double-layer rotating plate. A plurality of teeth are fixedly connected to the outer wall of the double-layer rotating plate in a surrounding manner.

[0010] Preferably, the rotating structure includes a support plate and a motor fixedly connected to the outer wall of one end of the support plate. The motor is specifically a model that can rotate forward and backward. A screw rod is fixedly connected to the motor. A guide rod is provided below the screw rod. A slider is threadedly connected to the screw rod. The bottom end of the support plate is fixedly connected to the outer wall of one side of the top end of the chassis.

[0011] Preferably, a toothed plate is slidably connected to the guide rod. The toothed plate can be intermittently meshed with the plurality of teeth. The outer wall of one side of the top end of the toothed plate is fixedly connected to the outer wall of the bottom end of the slider. One end of the guide rod is fixedly connected to the outer wall of one end of the support plate.

[0012] Preferably, a turntable is fixedly connected to a section of the screw rod. A rotating handle is fixedly connected to the outer wall of one side of the turntable. A hollow long plate is slidably and fittingly connected to the rotating handle. A vertical rod is fixedly connected to the top end of the hollow long plate.

[0013] Preferably, a rubber card is fixedly connected to the outer wall of the vertical rod near the top end. An annular groove that fits and engages with the rubber card is formed in the inner wall of the vertical cylinder rod near the bottom end. The outer wall of the vertical rod is slidably connected through the bottom end of the vertical cylinder rod. A limiting block is slidably connected through the outer wall of the vertical cylinder rod.

[0014] Preferably, the cleaning structure further specifically includes a rectangular groove plate fixedly connected to the outer wall of one side of the top end of the chassis. A short rectangular groove is penetrated and opened at one end of the rectangular groove plate, and a rectangular groove is penetrated and opened at the other end of the rectangular groove plate.

[0015] Preferably, a T-shaped pressing plate is fixedly connected to the outer wall of one end of the transverse plate ring, and the T-shaped pressing plate and the inner wall of the bottom end of the short rectangular groove can be intermittently and adhesively connected.

[0016] Preferably, a cross bar is fixedly connected to the inner walls at both ends of the rectangular groove plate. A wind wheel is movably sleeved on the outer wall of the cross bar. Top plates are fixedly connected to the outer walls on both sides of the wind wheel. One ends of the two top plates can be intermittently and slidably connected in a fitting manner with the outer wall of the bottom end of the T-shaped pressing plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] In the present invention, by manually starting the motor on the chassis, the motor drives the screw to rotate. The rotation of the screw drives the slider and the toothed plate to move synchronously. The moving toothed plate contacts and meshes with the teeth installed on the outer wall of the double-layer rotating plate, thereby driving the double-layer rotating plate to rotate, driving the T-shaped shaft and the square groove plate to synchronously generate offsets, driving the pressing railing plate to generate an angular inclination in the double-layer rotating plate, driving the rubber pressing plate to contact and press against the outer wall of the sampling head, and generating a reinforcement effect on it;

[0019] When the screw rotates in the present invention, it also synchronously drives the turntable and the rotating handle to rotate, thereby driving the hollow long plate and the vertical rod to synchronously move. The rubber card on the vertical rod can drive the vertical cylinder rod to move downward. The downward moving vertical cylinder rod drives the transverse plate ring and multiple brushes to move downward synchronously, to briefly clean the surfaces of multiple dust inlet holes. In strong wind weather conditions, the wind will automatically drive the wind wheel on the cross bar to rotate, and the rotating wind wheel drives the top plates on both sides to rotate synchronously to drive the T-shaped pressing plate, and perform reciprocating translation within the local area of the short rectangular groove, and further drive the multiple brushes to perform reciprocating up and down movement within the local area of the multiple dust inlet holes, so as to continuously clean their surfaces and increase the working efficiency of dust collection and sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic front view plane structure diagram of the overall reinforcement sampling part of the present invention;

[0022] Figure 3 is a schematic diagram of the partial disassembly structure of the reinforcement sampling part of the present invention;

[0023] Figure 4Schematic diagram of the overall structure of the reinforcement sampling part of the present invention;

[0024] Figure 5 Schematic diagram of the partial structure of the reinforcement sampling part of the present invention;

[0025] Figure 6 Schematic diagram of the partial sectional structure of the reinforcement sampling part of the present invention (one);

[0026] Figure 7 Schematic diagram of the partial sectional structure of the reinforcement sampling part of the present invention (two);

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of the partial enlarged structure at position A in the present invention.

[0028] In the figure:

[0029] 1. Dust sampler; 11. Tripod; 12. Sampling head; 13. Dust inlet hole;

[0030] 2. Reinforcement sampling part; 21. Chassis; 22. Double-layer rotating plate; 23. Partition board; 24. Tooth plate; 2401. Teeth; 25. T-shaped round rod; 26. Pressing baffle; 27. Square groove plate; 28. T-shaped shaft; 29. Rubber pressing plate; 230. Support plate; 231. Motor; 232. Screw; 233. Slide block; 234. Turntable; 235. Turning handle; 236. Hollow long plate; 237. Vertical rod; 238. Rubber card; 239. Vertical cylinder rod; 240. Limit block; 241. Horizontal plate ring; 242. Brush; 243. T-shaped pressing plate; 244. Long rectangular groove plate; 245. Short square groove; 246. Rectangular groove; 247. Cross bar; 248. Wind wheel; 249. Top plate. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 8As shown in the figure, the present invention provides a dust sampling device for occupational health sampling, including a dust sampler 1. A tripod 11 can be tightly clamped at the bottom end of the dust sampler 1. A sampling head 12 can be threadedly connected inside the top end of the dust sampler 1. A plurality of dust inlet holes 13 are circumferentially formed on the sampling head 12. A reinforcement sampling part 2 is provided on the outer wall of the top end of the dust sampler 1. The reinforcement sampling part 2 includes a chassis 21 fixedly connected to the outer wall of the top end of the dust sampler 1. A clamping structure for reinforcing and limiting the sampling head 12 is provided on the chassis 21. A rotating structure with driving ability is further provided on one side of the top end of the chassis 21. A cleaning structure for cleaning each dust inlet hole 13 is provided on the rotating structure;

[0033] Adopting the above scheme: By manually starting the motor 231 on the chassis 21, the motor 231 drives the screw rod 232 to rotate. The rotation of the screw rod 232 drives the slider 233 and the toothed plate 24 to move synchronously. The moving toothed plate 24 contacts and meshes with the teeth 2401 installed on the outer wall of the double-layer rotating plate 22, thereby driving the double-layer rotating plate 22 to rotate, driving the T-shaped shaft 28 and the square groove plate 27 to generate offsets synchronously, driving the pressing railing plate 26 to tilt at an angle inside the double-layer rotating plate 22, driving the rubber pressing plate 29 to contact and press against the outer wall of the sampling head 12, producing a reinforcement effect on it. When the screw rod 232 rotates, it also synchronously drives the turntable 234 and the rotating handle 235 to rotate, thereby driving the hollow long plate 236 and the vertical rod 237 to move synchronously. Through the rubber card 238 on the vertical rod 237, the vertical cylinder rod 239 can be driven to move downward. The downward-moving vertical cylinder rod 239 drives the horizontal plate ring 241 and a plurality of brushes 242 to move downward synchronously to briefly clean the surfaces of the plurality of dust inlet holes 13. In strong wind weather, the wind automatically drives the wind wheel 248 on the cross bar 247 to rotate, and the rotating wind wheel 248 drives the top plates 249 on both sides to rotate synchronously to drive the T-shaped pressing plate 243 to perform reciprocating translation within the local area of the short rectangular groove 245, thereby driving the plurality of brushes to perform reciprocating up and down movements within the local area of the plurality of dust inlet holes 13 to continuously clean their surfaces.

[0034] Among them, the clamping structure includes three T-shaped round rods 25. The bottom ends of the three T-shaped round rods 25 are fixedly connected to the outer wall of the top end of the chassis 21. The three T-shaped round rods 25 are all movably sleeved with a pressing railing plate 26. And rubber pressing plates 29 are fixedly connected to the outer walls of one ends of the three pressing railing plates 26. The other ends of the three rubber pressing plates 29 can intermittently and tightly fit and connect with the outer wall of the sampling head 12;

[0035] The clamping structure specifically further includes a double-layer rotating plate 22 that is fitted and rotatably connected to the outer wall of the top end of the chassis 21. Three partition plates 23 are fixedly connected in a surrounding manner in the double-layer rotating plate 22. A square groove plate 27 is also fitted and slidably connected to each of the three pressing railing plates 26. The outer walls of the three square groove plates 27 can be fitted and slidably connected to the inner wall of the double-layer rotating plate 22. T-shaped shafts 28 are fixedly connected to the outer walls of the tops of the three square groove plates 27. The three T-shaped shafts 28 are also rotatably connected through one end of the double-layer rotating plate 22. A plurality of teeth 2401 are specifically fixedly connected in a surrounding manner on the outer wall of the double-layer rotating plate 22.

[0036] Adopting the above solution: When the toothed plate 24 comes into contact and meshes with the teeth 2401 installed on the outer wall of the double-layer rotating plate 22, the double-layer rotating plate 22 can be driven to rotate. The rotating double-layer rotating plate 22 will drive the T-shaped shaft 28 and the square groove plate 27 to shift synchronously, enabling the square groove plate 27 to drive the pressing railing plate 26 to tilt at an angle within the double-layer rotating plate 22, gradually approaching the sampling head 12 until the rubber pressing plate 29 is driven to contact and press against the outer wall of the sampling head 12, producing a strengthening effect on it, helping the sampling head 12 to always maintain a stable state on the dust sampler 1, which is beneficial to the sampling effect of the sampling head 12 on dust.

[0037] The rotating structure includes a support plate 230 and a motor 231 fixedly connected to the outer wall of one end of the support plate 230. The motor 231 is specifically a model that can rotate forward and backward. A screw rod 232 is fixedly connected to the motor 231. A guide rod is provided below the screw rod 232. A slider 233 is threadedly connected to the screw rod 232. The bottom end of the support plate 230 is fixedly connected to the outer wall of one side of the top end of the chassis 21. A toothed plate 24 is slidably connected to the guide rod. The toothed plate 24 and the plurality of teeth 2401 can be intermittently meshed. The outer wall of one side of the top end of the toothed plate 24 is fixedly connected to the outer wall of the bottom end of the slider 233. One end of the guide rod is fixedly connected to the outer wall of one end of the support plate 230. A turntable 234 is fixedly connected to one section of the rod body of the screw rod 232. A turning handle 235 is fixedly connected to the outer wall of one side of the turntable 234. A hollow long plate 236 is fitted and slidably connected to the turning handle 235. A vertical rod 237 is fixedly connected to the top of the hollow long plate 236. A rubber card 238 is fixedly connected to the outer wall of the vertical rod 237 near the top. An annular groove that is fitted and clamped with the rubber card 238 is formed in the inner wall of the vertical tube rod 239 near the bottom end. The outer wall of the vertical rod 237 is slidably connected through the bottom end of the vertical tube rod 239. A limiting block 240 is slidably connected through the outer wall of the vertical tube rod 239.

[0038] Adopting the above scheme: When starting the dust sampler 1 for dust sampling work, the motor 231 on the chassis 21 can be started synchronously, so that the motor 231 drives the screw rod 232 to rotate. The rotation of the screw rod 232 will drive the slider 233 and the toothed plate 24 to move synchronously. When the toothed plate 24 moves passively, it will move horizontally through the installation of the guide rod, and thus can also drive the slider 233 to translate synchronously. When the screw rod 232 rotates, it will also drive the turntable 234 and the rotating handle 235 to rotate synchronously. The rotating rotating handle 235 slides in the hollow long plate 236, and thus can drive the hollow long plate 236 and the vertical rod 237 to move synchronously. The moving hollow long plate 236 will achieve the horizontal movement effect through the limit block 240 installed on the vertical rod 237. Thus, the rubber card 238 on the vertical rod 237 can drive the vertical cylinder rod 239 to move downward.

[0039] Among them, the cleaning structure includes a vertical cylinder rod 239. A horizontal plate ring 241 is fixedly connected near the top of the vertical cylinder rod 239. A plurality of brush hairs 242 are fixedly connected in a surrounding manner on the inner wall of the horizontal plate ring 241. Each brush hair 242 can be intermittently in fitting sliding connection with the sampling head 12 and a plurality of dust inlet holes 13.

[0040] Specifically, the cleaning structure further includes a rectangular groove plate 244 fixedly connected to the outer wall of one side of the top end of the chassis 21. A short rectangular groove 245 is penetrated and opened at one end of the rectangular groove plate 244, and a rectangular groove 246 is penetrated and opened at the other end of the rectangular groove plate 244. A T-shaped pressing plate 243 is fixedly connected to the outer wall of one end of the horizontal plate ring 241. The T-shaped pressing plate 243 can be intermittently in fitting connection with the inner wall of the bottom end of the short rectangular groove 245. A cross bar 247 is fixedly connected between the inner walls at both ends of the rectangular groove plate 244. A wind wheel 248 is movably sleeved on the outer wall of the cross bar 247. Top plates 249 are fixedly connected to the outer walls on both sides of the wind wheel 248. The outer walls of one ends of the two top plates 249 can be intermittently in fitting sliding connection with the outer wall of the bottom end of the T-shaped pressing plate 243.

[0041] Adopting the above scheme: The downward moving vertical cylinder rod 239 will drive the horizontal plate ring 241 and a plurality of brush hairs 242 to move downward synchronously, and thus can briefly clean the surfaces of a plurality of dust inlet holes 13 through the plurality of brush hairs 242. The driven downward moving horizontal plate ring 241 will also drive the T-shaped pressing plate 243 to move downward and stick to the inner wall of one end of the short rectangular groove 245. And in strong wind weather, the wind force will automatically drive the wind wheel 248 on the cross bar 247 to rotate, and the rotating wind wheel 248 will drive the top plates 249 on both sides to rotate synchronously. Thus, the two rotating top plates 249 will strike and drive the T-shaped pressing plate 243 to perform reciprocating horizontal movement within the local area of the short rectangular groove 245, and thus can drive a plurality of brush hairs to perform reciprocating up and down movement within the local area of a plurality of dust inlet holes 13 to continuously clean their surfaces.

[0042] Working principle and usage process of the present invention: After manually screwing the sampling head 12 onto the dust sampler 1 in a threaded manner, when starting the dust sampling work of the dust sampler 1, the motor 231 on the chassis 21 can be started synchronously, so that the motor 231 drives the screw rod 232 to rotate. The rotation of the screw rod 232 will drive the slider 233 and the toothed plate 24 to move synchronously. When the toothed plate 24 moves passively, it will move horizontally through the installation of the guide rod, and thus can also drive the slider 233 to translate synchronously. The moving toothed plate 24 will contact and engage with the teeth 2401 installed on the outer wall of the double-layer rotating plate 22, thereby driving the double-layer rotating plate 22 to rotate. The rotating double-layer rotating plate 22 will drive the T-shaped shaft 28 and the square groove plate 27 to generate offsets synchronously, enabling the square groove plate 27 to drive the pressing bar 26 to tilt at an angle within the double-layer rotating plate 22, gradually approaching the sampling head 12 until the rubber pressing plate 29 is driven to contact and press against the outer wall of the sampling head 12, producing a reinforcement effect, helping the sampling head 12 to always maintain a stable state on the dust sampler 1, being beneficial to the sampling effect of the sampling head 12 on dust, and also being able to improve the service life of both;

[0043] When the screw rod 232 rotates, it will also drive the turntable 234 and the rotating handle 235 to rotate synchronously. The rotating rotating handle 235 slides within the hollow long plate 236, thereby being able to drive the hollow long plate 236 and the vertical rod 237 to move synchronously. The moving hollow long plate 236 will achieve a horizontal movement effect through the limit block 240 installed on the vertical rod 237. Thus, the rubber card 238 on the vertical rod 237 can drive the vertical cylinder rod 239 to move downward. The downward-moving vertical cylinder rod 239 will drive the horizontal plate ring 241 and multiple brushes 242 to move downward synchronously. Furthermore, the multiple brushes 242 can be used to briefly clean the surfaces of multiple dust inlet holes 13. The driven downward-moving horizontal plate ring 241 will also drive the T-shaped pressing plate 243 to move downward and stick to one end inner wall of the short square groove 245. And in windy weather conditions, the wind will automatically drive the wind wheel 248 on the cross bar 247 to rotate, and the rotating wind wheel 248 will drive the top plates 249 on both sides to rotate synchronously. Thus, the two rotating top plates 249 will strike and drive the T-shaped pressing plate 243 to perform reciprocating horizontal translation within the local area of the short square groove 245. Furthermore, it can drive the multiple brushes to perform reciprocating up and down movement within the local area of the multiple dust inlet holes 13, so as to continuously clean their surfaces to improve the working efficiency of dust collection and sampling and ensure the normal operation of the sampling work.

[0044] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust sampling device for occupational health sampling, comprising a dust sampler (1), characterized in that: A tripod (11) can be tightly clamped to the bottom end of the dust sampler (1). A sampling head (12) can be threadedly connected to the top end of the dust sampler (1). A plurality of dust inlet holes (13) are circumferentially formed in the sampling head (12). A reinforcement sampling part (2) is provided on the outer wall of the top end of the dust sampler (1). The reinforcement sampling part (2) includes a chassis (21) fixedly connected to the outer wall of the top end of the dust sampler (1). A clamping structure for reinforcing and limiting the sampling head (12) is provided on the chassis (21). A rotating structure with driving ability is further provided on one side of the top end of the chassis (21). A cleaning structure for cleaning each of the dust inlet holes (13) is provided on the rotating structure; Among them, the clamping structure includes three T-shaped round rods (25). The bottom ends of the three T-shaped round rods (25) are fixedly connected to the outer wall of the top end of the chassis (21). Three pressure-receiving fence plates (26) are movably sleeved on the three T-shaped round rods (25). Rubber pressure plates (29) are fixedly connected to the outer walls of one ends of the three pressure-receiving fence plates (26). The other ends of the three rubber pressure plates (29) can intermittently and tightly fit and connect to the outer wall of the sampling head (12); Among them, the cleaning structure includes a vertical cylinder rod (239). A horizontal plate ring (241) is fixedly connected to the vertical cylinder rod (239) near the top. A plurality of brushes (242) are circumferentially and fixedly connected to the inner wall of the horizontal plate ring (241). Each of the brushes (242) can intermittently fit and slide on the sampling head (12) and a plurality of dust inlet holes (13); Specifically, the clamping structure further includes a double-layer rotating plate (22) rotatably and fittingly connected to the outer wall of the top end of the chassis (21). Three partition plates (23) are circumferentially and fixedly connected to the double-layer rotating plate (22). Square groove plates (27) are slidably and fittingly connected to the three pressure-receiving fence plates (26). The outer walls of the three square groove plates (27) can slidably and fittingly connect to the inner wall of the double-layer rotating plate (22). T-shaped shafts (28) are fixedly connected to the outer walls of the top ends of the three square groove plates (27). The three T-shaped shafts (28) are also rotatably connected through one end of the double-layer rotating plate (22). A plurality of teeth (2401) are circumferentially and fixedly connected to the outer wall of the double-layer rotating plate (22); The rotation structure includes a support plate (230) and a motor (231) fixedly connected to the outer wall of one end of the support plate (230). The motor (231) is a specifically designed model that can rotate forward and backward. A screw rod (232) is fixedly connected to the motor (231). A guide rod is provided below the screw rod (232). A slider (233) is threadedly connected to the screw rod (232). The bottom end of the support plate (230) is fixedly connected to the outer wall of one side of the top end of the chassis (21). A toothed plate (24) is slidably connected to the guide rod. The toothed plate (24) can be intermittently meshed with a plurality of the teeth (2401). The outer wall of one side of the top end of the toothed plate (24) is fixedly connected to the outer wall of the bottom end of the slider (233). One end of the guide rod is fixedly connected to the outer wall of one end of the support plate (230). A turntable (234) is fixedly connected to a section of the rod body of the screw rod (232). A turning handle (235) is fixedly connected to the outer wall of one side of the turntable (234). A hollow long plate (236) is slidably connected to the turning handle (235). A vertical rod (237) is fixedly connected to the top end of the hollow long plate (236). A rubber card (238) is fixedly connected to the outer wall of the vertical rod (237) near the top end. An annular groove that fits and engages with the rubber card (238) is formed in the inner wall of the vertical cylinder rod (239) near the bottom end. The outer wall of the vertical rod (237) is slidably connected through the bottom end of the vertical cylinder rod (239). A limiting block (240) is slidably connected through the outer wall of the vertical cylinder rod (239).

2. The dust sampling device for occupational health sampling according to claim 1, characterized in that: The cleaning structure specifically further includes a rectangular groove plate (244) fixedly connected to the outer wall of one side of the top end of the chassis (21). A short rectangular groove (245) is formed through one end of the rectangular groove plate (244). A rectangular groove (246) is formed through the other end of the rectangular groove plate (244).

3. The dust sampling device for occupational health sampling according to claim 2, characterized in that: A T-shaped pressing plate (243) is fixedly connected to the outer wall of one end of the horizontal plate ring (241). The T-shaped pressing plate (243) can be intermittently in contact with the inner wall of the bottom end of the short rectangular groove (245).

4. The dust sampling device for occupational health sampling according to claim 3, wherein: Cross bars (247) are fixedly connected to the inner walls of both ends of the rectangular groove plate (244). A wind wheel (248) is movably sleeved on the outer wall of the cross bars (247). Top plates (249) are fixedly connected to the outer walls on both sides of the wind wheel (248). The outer walls of one ends of the two top plates (249) can be intermittently in contact and slidably connected to the outer wall of the bottom end of the T-shaped pressing plate (243).

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