A device for collecting atmospheric particulate matter and a buffer device for collecting particles

Abstract

This invention discloses an atmospheric particulate matter collection device and a buffer device for particle collection. The buffer device includes a housing with an air inlet and an air outlet at both ends; two sliding rods arranged in two rows inside the housing, staggered vertically, with teeth on the outer side of each sliding rod; and a buffer device positioned near the air outlet. When the sliding rods move downwards, the buffer device provides cushioning to the sliding rods near the air outlet, preventing them from falling too quickly and shaking the sampled particles, thus facilitating particle collection.

Description

Technical Field

[0001] This invention relates to the field of atmospheric particulate matter collection technology, and in particular to an atmospheric particulate matter collection device and a buffer device for particulate matter collection. Background Technology

[0002] With the increasing severity of environmental pollution and the growing public concern about environmental and air quality, air quality monitoring has become increasingly important. Air quality monitoring not only provides indicators of various pollution levels, but more importantly, it reveals the sources of pollution and how to strengthen pollution source control and environmental protection. Air sampling includes hazardous gas sampling and particulate matter sampling. During particulate matter sampling, a certain volume of air is passed through a sampling membrane. Particulate matter suspended in the air is trapped on the membrane. Based on the increased mass of the filter membrane and the volume of air passing through it, the total suspended particulate matter concentration in the air is determined. This method can also be used to determine components such as metals, inorganic salts, and organic pollutants in particulate matter.

[0003] Chinese invention patent CN111551405A discloses an atmospheric monitoring air particulate matter collection device, including a lower monitoring unit, an extraction pipe, and an extraction pump. An upper monitoring unit is installed above the lower monitoring unit, and an isolation filter screen is installed above the upper monitoring unit. A baffle plate is installed on the inner wall of the upper monitoring unit, and a dust collection tray is located below the upper monitoring unit, installed inside the lower monitoring unit. A strip-shaped groove is formed on the wall of the lower monitoring unit, and a rainproof plate is installed on the outer side of the groove, with the rainproof plate also installed on the surface of the lower monitoring unit. This atmospheric monitoring air particulate matter collection device uses a conical isolation filter screen to filter large debris such as leaves, preventing them from interfering with the normal collection of air particulate matter. It also allows leaves to slide down the side wall of the conical isolation filter screen, preventing them from remaining on the collection device.

[0004] However, the collection device of this equipment has a very simple structure. After a period of use, staff often need to go to the site to collect samples and replace the collection device. When a large number of samples need to be collected, it will increase the workload of the staff and is not conducive to practical use.

[0005] Therefore, it is necessary to provide an atmospheric particulate matter collection device and a buffer device for particulate matter collection to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide an atmospheric particulate matter collection device and a buffer device for particulate matter collection, so as to solve the problem that the existing equipment mentioned in the background art has an overly simple collection device structure. After a period of use, it is often necessary for staff to go to the site to collect samples and replace the collection device. When a large number of samples need to be collected, it will increase the workload of staff and is not conducive to practical use.

[0007] Based on the above ideas, the present invention provides the following technical solution: a buffer device for particle collection, comprising: a shell, wherein an air inlet and an air outlet are respectively provided at both ends of the shell; a sliding rod, wherein the sliding rod is disposed on both sides inside the shell, the sliding rod is arranged in two rows, the two rows of sliding rods are staggered in the vertical direction, and the outer side of the sliding rod is provided with protruding teeth; and a buffer device, wherein the buffer device is disposed near the air outlet, and when the sliding rod moves downward, the buffer device provides buffer for the sliding rod near the air outlet, preventing the sliding rod from falling too fast and shaking the sampled particles, which is beneficial to particle collection.

[0008] Preferably, the buffer device includes a rotating wheel, a rack, and a baffle plate. The rotating wheel engages with the toothed rod when the sliding rod near the air outlet descends. The rack is located on the side of the baffle plate near the rotating wheel and engages with the rotating wheel. When the sliding rod descends, it engages with the rotating wheel. The rotating wheel rotates and cooperates with the rack to raise the baffle plate, preventing reverse airflow from the air outlet when the sliding rod descends, which would blow away the collected particles and help preserve the particles.

[0009] Preferably, the buffer device further includes a piston rod, a piston cylinder, a connecting chamber, and an air nozzle. The piston cylinder is fixedly disposed inside the outer shell, the piston rod is slidably connected to the upper side of the piston cylinder, the connecting chamber is connected through to the bottom of the piston cylinder, the air nozzle is opened on the connecting chamber and faces the air outlet, the top of the piston rod is fixedly connected to the baffle plate, the baffle plate rises and drives the piston rod to rise inside the piston cylinder, the generated air pressure can provide buffer for the sliding rod, and at the same time, when the sliding rod has finished descending and the convex tooth disengages from the rotating wheel, the baffle plate falls freely under gravity, the piston rod generates exhaust airflow as the piston cylinder descends, and blows out the residual particles accumulated under the air outlet through the connecting chamber and the air nozzle to prevent particle accumulation.

[0010] An atmospheric particulate matter collection device includes the aforementioned buffer device for particulate matter collection, a fan is provided at the air inlet, and a sampling mechanism is provided inside the outer shell between the air inlet and the air outlet.

[0011] The sampling mechanism includes sliding rods on both sides inside the outer shell. A dust sampling membrane is connected between two adjacent sliding rods in the horizontal direction. Each layer of dust sampling membrane is folded in sequence in the vertical direction. The sliding rods on both sides slide down in sequence, causing each layer of dust sampling membrane to open in sequence to filter the airflow. The sampled dust sampling membranes are stacked in sequence at the bottom inside the outer shell.

[0012] Preferably, the outer side of the slide bar is provided with protruding teeth, and the outer side of the two rows of slide bars inside the housing is provided with a first support gear and a second support gear respectively, and the first support gear and the second support gear mesh with the protruding teeth on the outer side of the slide bar.

[0013] Preferably, a rotating shaft is provided on the outer side of the slide rod. The rotating shaft passes through and is fixedly connected to the first support gear. The rotating shaft passes through and is fixedly connected to the second support gear. One end of the rotating shaft extends out of the housing. One end of the rotating shaft extending to the outside of the housing is connected to a first motor. The other end of the rotating shaft extending to the outside of the housing is connected to a second motor.

[0014] Preferably, positioning rods are provided on both sides of the interior of the outer shell, the positioning rods pass through the slide rods and are slidably connected to the slide rods, the bottom of the interior of the outer shell is provided with positioning holes that cooperate with the positioning rods, and the top of the positioning rods protrudes from the outer shell and is slidably connected to the outer shell.

[0015] Preferably, a baffle plate is provided inside the housing on the side near the air inlet, and the baffle plate contacts the protruding teeth on the outer side of the slide bar.

[0016] Preferably, connecting strips are fixedly provided on both the front and rear sides of the dust sampling membrane, and the interior of the connecting strips is set as a cavity, which is filled with magnetic particles. Magnetic areas are provided on both the front and rear side walls inside the outer shell, and the magnetic areas are located between the two positioning rods. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the mating structure of the dust sampling membrane and the cover plate of the present invention;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the dust sampling membrane of the present invention;

[0021] Figure 4 This is the present invention. Figure 2 A magnified structural diagram at point A;

[0022] Figure 5 This is a schematic diagram of the connection structure between the connecting strip and the dust sampling membrane of the present invention;

[0023] Figure 6 This is the present invention. Figure 5 A magnified structural diagram at point B;

[0024] Figure 7 This is a schematic diagram of the connection structure between the cover plate and the slide rod of the present invention;

[0025] Figure 8 This is the present invention. Figure 7 A magnified structural diagram at point D;

[0026] Figure 9 This is the present invention. Figure 7 A magnified structural diagram at point C;

[0027] Figure 10 This is a schematic diagram of the magnetic region structure of the present invention;

[0028] Figure 11 This is a schematic diagram of the main structure of the buffer device of the present invention;

[0029] Figure 12 This is a front view of the wind deflector of the present invention.

[0030] In the diagram: 1. Air inlet; 2. Second support gear; 3. Baffle plate; 4. Positioning rod; 5. Outer shell; 6. First support gear; 7. Magnetic area; 8. Fan; 9. Air outlet; 10. Dust sampling membrane; 11. Convex tooth; 12. Slide rod; 13. Cover plate; 14. Connecting strip; 15. Rotating shaft; 16. Cavity; 17. Hinge block; 18. Groove; 19. Hinge shaft; 20. First magnetic plate; 21. Second magnetic plate; 22. Knob; 23. Buffer device; 231. Rotating wheel; 232. Rack; 233. Baffle plate; 234. Piston rod; 235. Piston cylinder; 236. Connecting chamber; 237. Air nozzle. Detailed Implementation

[0031] like Figure 1 As shown, an atmospheric particulate matter collection device includes a housing 5, with an air inlet 1 and an air outlet 9 at both ends of the housing 5. A fan 8 is installed at the air inlet 1 to draw airflow from the external environment. Meanwhile, a sampling mechanism is installed inside the housing 5 between the air inlet 1 and the air outlet 9. In actual use, the fan 8 draws air from the external environment into the housing 5 and discharges it through the air outlet 9. During this process, the airflow passes through the sampling mechanism inside the housing 5, which can filter and sample dust particles in the airflow, thus facilitating subsequent detection.

[0032] like Figure 1-4As shown, the sampling mechanism includes slide rods 12 disposed on both sides inside the housing 5. The slide rods 12 are arranged in two rows, and the two rows of slide rods 12 are staggered from each other in the vertical direction. A dust sampling membrane 10 is connected between two adjacent slide rods 12 in the horizontal direction. The two ends of the dust sampling membrane 10 are fixed to the slide rods 12 on both sides respectively. Since the two rows of slide rods 12 are staggered from each other in the vertical direction, the dust sampling membrane 10 connected between the slide rods 12 on both sides is in an inclined state.

[0033] Furthermore, a tooth 11 is provided on the outer side of the slide rod 12, and a first support gear 6 and a second support gear 2 are respectively provided on the outer side of the two rows of slide rods 12 inside the outer casing 5. The first support gear 6 and the second support gear 2 are both engaged with the tooth 11 on the outer side of the slide rod 12. This structure can effectively support the two rows of slide rods 12, thereby maintaining their stability in the vertical direction.

[0034] Specifically, the number of first support gears 6 and second support gears 2 are both set to multiple and symmetrically distributed on the front and rear sides inside the outer casing 5. At the same time, a rotating shaft 15 is provided on the outside of the slide rod 12. The rotating shaft 15 passes through the first support gear 6 and is fixedly connected to it. The rotating shaft 15 also passes through the second support gear 2 and is fixedly connected to it. Both ends of the rotating shaft 15 are rotatably connected to the outer casing 5 through bearings. Meanwhile, one end of the rotating shaft 15 extends out of the outer casing 5. The end of the rotating shaft 15 on the left side extending to the outside of the outer casing 5 is connected to a first motor. Similarly, the end of the rotating shaft 15 on the right side extending to the outside of the outer casing 5 is connected to a second motor. In actual use, the first motor and the second motor can drive the rotating shafts 15 on both sides to rotate, thereby driving the first support gear 6 and the second support gear 2 to rotate, which is beneficial for driving the slide rod 12 to move downward.

[0035] Furthermore, positioning rods 4 are respectively provided on both sides inside the outer casing 5. The positioning rods 4 pass through the slide rod 12 and are slidably connected to the slide rod 12. A positioning hole that cooperates with the positioning rods 4 is provided at the bottom inside the outer casing 5. The bottom end of the positioning rods 4 is located inside the positioning hole. At the same time, the top end of the positioning rods 4 passes through the outer casing 5 and is slidably connected to the outer casing 5. A knob 22 is fixedly connected to the top end of the positioning rods 4. This structure facilitates the removal of the positioning rods 4 from the outer casing 5, thereby removing the sampling mechanism.

[0036] like Figure 1-2As shown, in actual use, the bottommost slide rod 12 on the right slides down along the positioning rod 4 to the bottom of the outer casing 5, and the bottom surface of the slide rod 12 contacts the inner bottom surface of the outer casing 5. The slide rod 12 on the left remains stationary due to the limitation of the first support gear 6. Therefore, when the bottommost slide rod 12 on the right slides down, it can open the dust sampling membrane 10 between the two slide rods 12, causing it to be tilted. At this time, the airflow entering from the air inlet 1 passes through the dust sampling membrane 10 and is then discharged through the air outlet 9. The dust sampling membrane 10 can filter dust in the airflow, and its tilted position increases its contact area with the airflow, facilitating better filtration. The filtered dust remains on the dust sampling membrane 10, which is beneficial for later testing. When ventilation... After a set time, the motor on the left starts, driving the rotating shaft 15 to rotate. The rotating shaft 15 drives the first support gear 6 to rotate. The outer teeth 11 of the slide rod 12 mesh with the rotating shaft 15. Therefore, when the rotating shaft 15 drives the first support gear 6 to rotate, it can drive the slide rod 12 to move downward. When the slide rod 12 passes the first support gear 6, the first support gear 6 loses its support for the slide rod 12. At this time, under its own gravity, it can move downward along the positioning rod 4. Then, the upper slide rod 12 will fall back onto the first support gear 6 under gravity. The first support gear 6 can support it, which is beneficial for releasing it one by one later. The slide rod 12 on the right is stationary at this time because it is supported by the second support gear 2. Therefore, when the slide rod 12 on the left slides downward, it can open the dust sampling membrane 10 between the two slide rods 12. Figure 2As shown, when the left slide bar 12 slides down along the positioning rod 4 to the bottom surface inside the outer casing 5, the bottom slide bars 12 of both rows are positioned inside the bottom of the outer casing 5. The dust sampling membrane 10, which has already been sampled, is placed between the two slide bars 12 at the bottom of the outer casing 5 and is in a horizontal position. At the same time, the dust sampling membrane 10 between the bottom slide bar 12 on the left and the second-to-last slide bar 12 on the right is opened. At this time, the fan 8 is driven again, and the airflow can be sampled again through the newly opened dust sampling membrane 10. After sampling is completed, the motor on the right drives the rotating shaft 15 on the right to rotate, thereby driving the second support gear 2 to rotate and releasing the second slide bar 12 on the right. The slide bar 12 on the left remains stationary, which is conducive to the release of the sampled dust. The dust sampling membrane 10 is folded and stored, while a new dust sampling membrane 10 is unfolded for sampling. Repeating the above process allows for multiple samplings of particulate matter in the air. After sampling, the dust sampling membrane 10 is folded and stored, which facilitates retrieval by staff later. Since all dust sampling membranes 10 are the same size, and the fan 8 operates for the same amount of time during the sampling process of a single dust sampling membrane 10, each dust sampling membrane 10 represents a sample of particulate matter passing through the airflow within a specific time period. In other words, each dust sampling membrane 10 detects airflow at a specific flow rate. Later, staff can detect the particulate matter retained on each dust sampling membrane 10 to determine the particulate matter content in the airflow at a specific flow rate, which helps improve the accuracy of the detection.

[0037] At the same time, when the slide bar 12 slides down along the positioning bar 4, two adjacent slide bars 12 will stack on the positioning bar. That is, multiple slide bars 12 that slide down to the bottom of the positioning bar 4 will stack together in sequence. The mutual contact of multiple slide bars 12 can play a sealing role, so that the airflow can only pass through the opened dust sampling membrane 10, thereby further improving the accuracy of the test.

[0038] After all sampling is completed, the positioning rod 4 can be pulled out by turning the knob 22. At this time, the positioning rod 4 is disengaged from the slide rod 12, and the staff can take out the dust sampling membrane 10 after sampling.

[0039] like Figure 4 As shown, a baffle plate 3 is provided inside the outer casing 5 on the side near the air inlet 1. The baffle plate 3 contacts the protruding teeth 11 on the outer side of the slide rod 12. This structure can prevent airflow from flowing between the slide rod 12 and the inner top wall of the outer casing 5, and facilitates the airflow to pass through the opened dust sampling membrane 10. This ensures that each dust sampling membrane 10 samples the airflow of the same flow rate, thereby improving the sampling accuracy.

[0040] like Figure 5-6As shown in Figure 11, connecting strips 14 are fixedly installed on both the front and rear sides of the dust sampling membrane 10. The connecting strips 14 are made of rubber or fiber material and have a certain elasticity. The interior of the connecting strips 14 is set as a cavity 16, and magnetic particles, such as block or granular magnets, are filled inside the cavity 16. Magnetic regions 7 are provided on both the front and rear side walls inside the outer shell 5, and the magnetic regions 7 are located between the two positioning rods 4.

[0041] In actual use, when the slide bar 12 falls and moves the dust sampling membrane 10, the connecting strips 14 on the front and rear sides of the dust sampling membrane 10 will be attracted by the magnetic area 7 on the inner wall of the outer shell 5. Therefore, during the process of the slide bar 12 moving the dust sampling membrane 10 open, the connecting strips 14 will always slide within the magnetic area 7. The mutual attraction between the magnetic area 7 and the connecting strips 14 can prevent airflow from passing between the connecting strips 14 and the inner wall of the outer shell 5, thereby allowing airflow to flow over the opened dust sampling membrane 10, which is beneficial to improving the sampling accuracy.

[0042] like Figure 3-4 As described in 7-10, a cover plate 13 is provided vertically between two adjacent dust sampling membranes 10. One end of the cover plate 13 is hinged to a sliding rod 12 on one side, and the other end of the cover plate 13 is attracted to the sliding rod 12 on the other side. Figure 1-2 As shown, the left end of the bottom cover plate 13 is hinged to the bottom left sliding rod 12, while the right end of the cover plate 13 is attracted to the second-to-last right sliding rod 12. When the bottom left sliding rod 12 slides down the positioning rod 4 to open the dust sampling membrane 10, the increased distance between the two sliding rods 12 allows the bottom left sliding rod 12 to pull the right end of the cover plate 13 to the bottom of the outer casing 5, thus increasing the traction force on the cover plate 13. The rods 12 disengage from each other, causing the cover plate 13 to move downwards along with the left sliding rod 12 and eventually rotate to cover the top of the bottom dust sampling membrane 10. At this time, the cover plate 13 is placed between the two bottom sliding rods 12, while the dust sampling membrane 10 is placed at the bottom of the cover plate 13. The cover plate 13 can protect the dust sampling membrane 10 and prevent the airflow from blowing out the particles trapped on it when sampling again, thus maintaining the integrity of the sample.

[0043] The right end of the second-to-last cover plate 13 is hinged to the second-to-last sliding rod 12 on the right, and the left end of this cover plate 13 is attracted to the second-to-last sliding rod 12 on the left. Therefore, when the second-to-last sliding rod 12 on the right slides downward, it can drive this cover plate 13 to move downward, thereby causing the cover plate 13 to disengage from the sliding rod 12 on the left and fall to the top of the dust sampling membrane 10 to cover and protect the sampled dust sampling membrane 10. According to the above connection method, the cover plate 13 is hinged to the sliding rods 12 on both sides in sequence, and the non-hinged end is attracted to the sliding rod 12 on the other side. Through this structure, after the dust sampling membrane 10 has been sampled, the sliding rod 12 slides downward, which can simultaneously drive the cover plate 13 to slide downward and cover the sampled dust sampling membrane 10 to protect it. This helps to maintain the integrity of the dust sampling membrane 10 sampling, thereby improving the accuracy of the experimental data.

[0044] Specifically, a hinge block 17 is fixedly provided on the slide rod 12, and a groove 18 that cooperates with the hinge block 17 is provided on the cover plate 13. A hinge shaft 19 is provided on the hinge block 17. The hinge shaft 19 is provided on the front and rear sides of the hinge block 17 and is fixed thereto. The hinge block 17 is rotatably connected to the inside of the groove 18 through the hinge shaft 19. The cover plate 13 is hinged to the slide rod 12 in this way, so that when the slide rod 12 slides down, it can drive the cover plate 13 to move downward.

[0045] A first magnetic sheet 20 is provided on the side of the cover plate 13 away from the groove 18, and a second magnetic sheet 21 is provided on the adjacent slide rod 12. The first magnetic sheet 20 and the second magnetic sheet 21 attract each other, and both the first magnetic sheet 20 and the second magnetic sheet 21 are set in an arc shape. The cover plate 13 is attracted to the slide rod 12 in this way. When the slide rod 12, which is hinged to the cover plate 13, moves the cover plate 13 downward, the traction force of the slide rod 12 on the cover plate 13 causes the first magnetic sheet 20 and the second magnetic sheet 21 to separate from each other, thereby causing the cover plate 13 to fall off and cover the dust sampling membrane 10 for protection.

[0046] A buffer device for particle collection includes: a housing 5, with an air inlet 1 and an air outlet 9 at each end; sliding rods 12, which are disposed on both sides inside the housing 5, arranged in two rows, staggered vertically, with teeth 11 on the outer side of each sliding rod; and a buffer device 23, which is disposed near the air outlet 9. When the sliding rods 12 move downward, the buffer device 23 provides a buffer for the sliding rods 12 near the air outlet 9, preventing the sliding rods from falling too quickly and shaking the sampled particles, thus facilitating particle collection.

[0047] Specifically, the buffer device 23 includes a rotating wheel 231, a rack 232, and a baffle plate 233. The rotating wheel 231 engages with the toothed teeth 11 when the sliding rod 12 near the air outlet 9 descends. The rack 232 is located on the side of the baffle plate 233 near the rotating wheel 231. The rack 232 engages with the rotating wheel 231 and engages with the rotating wheel when the sliding rod descends. The rotating wheel rotates and cooperates with the rack to raise the baffle plate, preventing reverse airflow from the air outlet when the sliding rod descends, which would blow up the collected particles and help preserve the particles.

[0048] Specifically, the buffer device 23 further includes a piston rod 234, a piston cylinder 235, a connecting chamber 236, and a jet nozzle 237. The piston cylinder 235 is fixedly disposed inside the outer casing 5. The piston rod 234 is slidably connected to the upper side of the piston cylinder 235. The connecting chamber 236 is connected through to the bottom of the piston cylinder 235. The jet nozzle 237 is opened on the connecting chamber 236 and faces the air outlet 9. The top of the piston rod 234 is fixedly connected to the baffle plate 233. When the baffle plate rises, it drives the piston rod to rise inside the piston cylinder. The generated air pressure can provide buffer for the sliding rod. At the same time, when the sliding rod has finished descending and the convex tooth disengages from the rotating wheel, the baffle plate falls freely under gravity. The piston rod generates an exhaust airflow as the piston cylinder descends, which blows out the residual particles accumulated under the air outlet through the connecting chamber and the jet nozzle, preventing particle accumulation.

Claims

1. A device for collecting atmospheric particulate matter, characterized in that: The device includes an outer casing with an air inlet and an air outlet at each end; and sliding rods located on both sides inside the outer casing, arranged in two rows, with the two rows of sliding rods staggered vertically, and the outer sides of the sliding rods having protruding teeth. The sliding rods are located on both sides inside the outer shell. A dust sampling membrane is connected between two adjacent sliding rods in the horizontal direction. The layers of dust sampling membranes in the vertical direction are folded in sequence. The sliding rods on both sides slide down in sequence, causing the layers of dust sampling membranes to open in sequence to filter the airflow. The sampled dust sampling membranes are stacked in sequence at the bottom inside the outer shell. Inside the outer casing, on the outer sides of the two rows of slide rods, a first support gear and a second support gear are respectively provided. Both the first support gear and the second support gear mesh with the convex teeth on the outer side of the slide rods. The outer sides of the two rows of slide rods are respectively provided with rotating shafts. One rotating shaft passes through the first support gear and is fixedly connected to it. The other rotating shaft passes through the second support gear and is fixedly connected to it. One end of the rotating shaft extends out of the housing. The end of the rotating shaft on one side extending to the outside of the housing is connected to the first motor. The end of the rotating shaft on the other side extending to the outside of the housing is connected to the second motor. Positioning rods are respectively provided on both sides of the inside of the outer shell. The positioning rods pass through the slide rods and are slidably connected to the slide rods. The bottom of the inside of the outer shell is provided with a positioning hole that cooperates with the positioning rods. The top end of the positioning rods passes through the outer shell and is slidably connected to the outer shell. It also includes a buffer device, which is located near the air outlet. When the slide bar moves downward, the buffer device provides cushioning for the slide bar near the air outlet. The buffer device includes a rotating wheel, a rack, and a baffle plate. The rotating wheel engages with the toothed rod when the sliding rod near the air outlet descends. The rack is located on the side of the baffle plate near the rotating wheel and engages with the rotating wheel. The buffer device further includes a piston rod, a piston cylinder, a connecting chamber, and an air nozzle. The piston cylinder is fixedly disposed inside the outer shell. The piston rod is slidably connected to the upper side of the piston cylinder. The connecting chamber is connected through to the bottom of the piston cylinder. The air nozzle is opened on the connecting chamber and faces the air outlet. The top of the piston rod is fixedly connected to the wind deflector.

2. The atmospheric particulate matter collection device according to claim 1, characterized in that: Connecting strips are fixedly installed on both the front and rear sides of the dust sampling membrane. The interior of the connecting strips is set as a cavity, and the cavity is filled with magnetic particles. Magnetic areas are set on both the front and rear side walls inside the outer shell, and the magnetic areas are set between the two positioning rods.

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