A device for collecting atmospheric particulate matter

Abstract

The present invention discloses a device for collecting atmospheric particulate matter, comprising a shell, wherein two ends of the shell are respectively provided with an air inlet and an air outlet, a fan is arranged at the air inlet, and a sampling mechanism is arranged inside the shell between the air inlet and the air outlet; the sampling mechanism comprises sliding bars arranged on both sides of the shell, the sliding bars are arranged in two rows, the sliding bars in the two rows are staggered with each other in the vertical direction, a dust sampling membrane is connected between two adjacent sliding bars in the horizontal direction, and each layer of the dust sampling membrane in the vertical direction is folded in sequence; the second sliding bar on the right side is released, while the sliding bar on the left side remains stationary, which is conducive to folding and storing the dust sampling membrane after sampling, and expanding the new dust sampling membrane for sampling, and repeating the above process can sample the particulate matter in the air for multiple times, and the dust sampling membrane after sampling is folded and stored, so as to facilitate the staff to take it later.

Description

Technical Field

[0001] The invention relates to the technical field of atmospheric particle collection, and in particular to a device for collecting atmospheric particle. Background Art

[0002] With the worsening of environmental pollution and people's increasing attention to environmental quality and air quality, the detection of air quality has become more and more important. Atmospheric detection can not only provide various pollution level indicators, but more importantly, it can remind people of the source of pollution and how to strengthen the control of pollution sources and environmental protection. Atmospheric sampling includes harmful gas sampling and particulate matter sampling. When sampling particulate matter, a certain volume of air is passed through the sampling membrane, and the particles suspended in the air are retained on the sampling membrane. The mass concentration of total suspended particles in the air is determined based on the mass increased by the filter membrane and the volume of air passing through the filter membrane. It can also be used to determine components such as metals, inorganic salts and organic pollutants in the particulate matter.

[0003] Chinese invention patent CN111551405A discloses an atmospheric monitoring air particle collection device, including a monitoring lower cylinder, an exhaust pipe and an exhaust pump, a monitoring upper cylinder is installed above the monitoring lower cylinder, and an isolation filter screen is installed above the monitoring upper cylinder, a spoiler baffle is installed on the inner wall of the monitoring upper cylinder, and a dust collection tray is arranged below the monitoring upper cylinder, the dust collection tray is installed on the inner side of the monitoring lower cylinder, a strip groove is opened on the wall of the monitoring lower cylinder, and a rain shield is arranged on the outer side of the strip groove, and the rain shield is installed on the surface of the monitoring lower cylinder. In the atmospheric monitoring air particle collection device, the isolation filter screen with a conical structure can filter large garbage impurities such as leaves, thereby preventing the normal collection of air particles from being affected, and at the same time facilitates the leaves to slide down along the side wall of the isolation filter screen with a conical structure, so as to avoid the leaves being stuck on the collection device.

[0004] However, the structure of the collection device of the equipment is too simple. After using it for a period of time, the staff often needs to go to the site to obtain samples and replace the new collection device. When a large number of samples need to be collected, the workload of the staff will increase, which is not conducive to practical use.

[0005] Therefore, it is necessary to provide a device for collecting atmospheric particulate matter to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a device for collecting atmospheric particulate matter to solve the problem that the structure of the collection device of the existing equipment proposed in the above background technology is too simple. After being used for a period of time, staff often need to go to the site to take samples and replace new collection devices. When a large number of samples need to be collected, the workload of the staff will be increased, which is not conducive to actual use.

[0007] Based on the above ideas, the present invention provides the following technical solution: comprising a shell, wherein an air inlet and an air outlet are respectively provided at two ends of the shell, a fan is provided at the air inlet, and a sampling mechanism is provided inside the shell between the air inlet and the air outlet;

[0008] The sampling mechanism includes sliding bars arranged on both sides of the shell, and the sliding bars are arranged in two rows. The sliding bars in the two rows are staggered in the vertical direction. A dust sampling membrane is connected between two adjacent sliding bars in the horizontal direction. The layers of dust sampling membrane in the vertical direction are folded in sequence, and the sliding bars on both sides slide down in sequence to drive the layers of dust sampling membrane to open in sequence to filter the airflow passing through. The dust sampling membranes after sampling are stacked in sequence at the bottom end of the shell.

[0009] As a further solution of the present invention: a convex tooth is arranged on the outer side of the slide rod, and a first supporting gear and a second supporting gear are respectively arranged on the outer sides of the two rows of slide rods inside the shell, and the first supporting gear and the second supporting gear are both meshed with the convex teeth on the outer side of the slide rod.

[0010] As a further solution of the present invention: a rotating shaft is arranged on the outer side of the sliding rod, the rotating shaft passes through the first supporting gear and is fixedly connected thereto, the rotating shaft passes through the second supporting gear and is fixedly connected to the second supporting gear, one end of the rotating shaft passes through the outer shell, one end of the rotating shaft on one side extends to the outside of the outer shell and is transmission-connected to the first motor, and the other end of the rotating shaft on the other side extends to the outside of the outer shell and is transmission-connected to the second motor.

[0011] As a further solution of the present invention: positioning rods are respectively arranged on both sides of the interior of the shell, the positioning rods pass through the sliding rod and are slidably connected to the sliding rod, a positioning hole matching the positioning rods is arranged at the inner bottom end of the shell, and the top end of the positioning rods passes through the shell and is slidably connected to the shell.

[0012] As a further solution of the present invention: a windshield is provided on one side of the housing close to the air inlet, and the windshield is in contact with the convex teeth on the outer side of the slide rod.

[0013] As a further solution of the present invention: connecting strips are fixedly provided on the front and rear sides of the dust sampling membrane, the interior of the connecting strip is set as a cavity, the interior of the cavity is filled with magnetic particles, and magnetic areas are provided on the front and rear side walls inside the shell, and the magnetic area is provided between two positioning rods.

[0014] As a further solution of the present invention: a cover plate is arranged between two adjacent dust sampling membranes in the vertical direction, one end of the cover plate is hinged to the sliding rod on one side, and the other end of the cover plate is mutually attracted to the sliding rod on the other side.

[0015] As a further solution of the present invention: a hinge block is fixedly arranged on the sliding rod, a groove matching the hinge block is arranged on the cover plate, a hinge shaft is arranged on the hinge block, the hinge shaft is arranged on the front and rear sides of the hinge block and fixed thereto, and the hinge block is rotatably connected to the inside of the groove via the hinge shaft.

[0016] As a further solution of the present invention: a first magnetic sheet is arranged on the side of the cover plate away from the groove, and a second magnetic sheet is arranged on the sliding rod adjacent to the first magnetic sheet. The first magnetic sheet and the second magnetic sheet are attracted to each other, and both the first magnetic sheet and the second magnetic sheet are arranged in an arc shape.

[0017] Compared with the prior art, the beneficial effect of the present invention is that when the sliding rod on the left side slides downward along the positioning rod to the bottom surface of the inner shell, the sliding rods at the bottom of the left and right rows are both placed at the bottom of the inner shell, and the dust sampling membrane that has been sampled is placed between the two sliding rods placed at the bottom of the shell and is in a horizontal state. At the same time, the dust sampling membrane between the bottom sliding rod on the left side and the second to last sliding rod on the right side is stretched open. At this time, the fan is driven again, and the passing airflow can be sampled again through the newly stretched dust sampling membrane. After the sampling is completed, the right side shaft is driven to rotate by the motor on the right side, thereby driving the second supporting gear to rotate and releasing the second sliding rod on the right side, while the sliding rod on the left side remains stationary, which is conducive to folding and storing the dust sampling membrane after sampling, and stretching the new dust sampling membrane for sampling. Repeating the above process can sample the particulate matter in the air multiple times, and the dust sampling membrane after sampling is folded and stored, which is convenient for the staff to take it later. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the matching structure of the dust sampling membrane and the cover plate of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the dust sampling membrane of the present invention;

[0022] Figure 4 The present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0023] Figure 5 It is a schematic diagram of the connection structure of the connection strip and the dust sampling membrane of the present invention;

[0024] Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure at B;

[0025] Figure 7 It is a schematic diagram of the connection structure between the cover plate and the slide rod of the present invention;

[0026] Figure 8 The present invention Figure 7 A schematic diagram of the structure at D of FIG.

[0027] Fig. 9 The present invention Figure 7 A schematic diagram of the enlarged structure at C;

[0028] Fig.10 It is a schematic diagram of the magnetic region structure of the present invention.

[0029] In the figure: 1. air inlet; 2. second supporting gear; 3. wind shield; 4. positioning rod; 5. housing; 6. first supporting gear; 7. magnetic area; 8. fan; 9. air outlet; 10. dust sampling membrane; 11. convex teeth; 12. sliding rod; 13. cover plate; 14. connecting strip; 15. rotating shaft; 16. cavity; 17. hinge block; 18. groove; 19. hinge shaft; 20. first magnetic sheet; 21. second magnetic sheet; 22. knob. DETAILED DESCRIPTION

[0030] like Figure 1 As shown, a device for collecting atmospheric particulate matter includes a shell 5, and an air inlet 1 and an air outlet 9 are respectively provided at both ends of the shell 5, and a fan 8 is arranged at the air inlet 1 to guide the airflow in the external environment. At the same time, a sampling mechanism is arranged inside the shell 5 between the air inlet 1 and the air outlet 9; in actual use, the air in the external environment is guided into the shell 5 by the fan 8 and discharged through the air outlet 9. In this process, the airflow will pass through the sampling mechanism inside the shell 5, and the dust in the airflow can be filtered and sampled through the sampling mechanism, which is beneficial to the later detection.

[0031] like Figure 1-4 As shown, the sampling mechanism includes sliding bars 12 arranged on both sides of the shell 5, the sliding bars 12 are arranged in two rows, and the sliding bars 12 in the two rows are staggered in the vertical direction, and a dust sampling membrane 10 is connected between two adjacent sliding bars 12 in the horizontal direction, and the two ends of the dust sampling membrane 10 are respectively fixed to the sliding bars 12 on both sides. Since the sliding bars 12 in the two rows are staggered in the vertical direction, the dust sampling membrane 10 correspondingly connected between the sliding bars 12 on both sides is in an inclined state.

[0032] Furthermore, a convex tooth 11 is provided on the outer side of the slide bar 12, and a first supporting gear 6 and a second supporting gear 2 are provided on the outer sides of the two rows of slide bars 12 inside the housing 5, respectively, and the first supporting gear 6 and the second supporting gear 2 are both meshed with the convex tooth 11 on the outer side of the slide bar 12. Through this structure, the two rows of slide bars 12 can be well supported, thereby maintaining their stability in the vertical direction;

[0033] Specifically, the number of the first support gear 6 and the second support gear 2 are set to be multiple and are symmetrically distributed on the front and rear sides of the shell 5. At the same time, a rotating shaft 15 is set on the outer side of the slide bar 12. The rotating shaft 15 passes through the first support gear 6 and is fixedly connected thereto. At the same time, the rotating shaft 15 passes through the second support gear 2 and is fixedly connected to the second support gear 2. Both ends of the rotating shaft 15 are rotatably connected to the shell 5 through bearings. At the same time, one end of the rotating shaft 15 passes through the shell 5, and the rotating shaft 15 on the left side extends to one end outside the shell 5 and is transmission-connected to the first motor. Similarly, the rotating shaft 15 on the right side extends to one end outside the shell 5 and is transmission-connected to the second motor. In actual use, the first motor and the second motor can respectively 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 conducive to driving the slide bar 12 to move downward.

[0034] Furthermore, positioning rods 4 are respectively provided on both sides of the interior of the shell 5, the positioning rods 4 pass through the slide rod 12 and are slidably connected to the slide rod 12, a positioning hole matching the positioning rod 4 is provided at the bottom end of the interior of the shell 5, and the bottom end of the positioning rod 4 is provided inside the positioning hole, and at the same time, the top end of the positioning rod 4 passes through the shell 5 and is slidably connected to the shell 5, and a knob 22 is fixedly connected to the top end of the positioning rod 4. This structure facilitates the pulling out of the positioning rod 4 from the shell 5, thereby taking out the sampling mechanism.

[0035] like Figure 1-2As shown, in actual use, a slide bar 12 located at the bottom end of the right row slides downward along the positioning rod 4 to the bottom of the housing 5, and the bottom surface of the slide bar 12 contacts the inner bottom surface of the housing 5, while the slide bar 12 of the left row is still in a stationary state due to the limit of the first supporting gear 6. Therefore, when the slide bar 12 at the bottom end of the right row slides downward, the dust sampling membrane 10 between the two slide bars 12 can be stretched open to make it in an inclined state. At this time, the airflow entering from the air inlet 1 will pass through the dust sampling membrane 10 and then be discharged through the air outlet 9. The dust in the airflow can be filtered through the dust sampling membrane 10, and the dust sampling membrane 10 is in a tilting device, which can increase its contact area with the airflow, which is conducive to better filtering the airflow. The filtered dust will be retained on the dust sampling membrane 10, which is conducive to its detection later. After ventilation for a certain period of time, the motor on the left side starts to drive the rotating shaft 15 to rotate, and the rotating shaft 15 The first support gear 6 is driven to rotate, and the convex teeth 11 on the outside of the slide bar 12 are meshed with the rotating shaft 15. Therefore, when the rotating shaft 15 drives the first support gear 6 to rotate, the slide bar 12 can be driven to move downward. When the slide bar 12 passes over the first support gear 6, the first support gear 6 loses its supporting effect on the slide bar 12. At this time, it can move downward along the positioning rod 4 under the action of its own gravity. After that, the upper slide bar 12 will fall on the first support gear 6 again under the action of gravity, and can be supported by the first support gear 6, which is conducive to releasing them one by one in the later stage. The slide bar 12 in the right row is in a stationary state at this time due to the support of the second support gear 2. Therefore, when the slide bar 12 on the left side slides downward, the dust sampling membrane 10 between the slide bars 12 on both sides can be opened. Figure 2As shown, when the left slide bar 12 slides downward along the positioning rod 4 to the inner bottom surface of the shell 5, the bottom slide bars 12 of the left and right rows are both placed at the inner bottom of the shell 5, and the dust sampling membrane 10 that has been sampled is placed between the two slide bars 12 placed at the bottom of the shell 5 and is in a horizontal state. 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 stretched open. At this time, the fan 8 is driven again, and the passing airflow can be sampled again through the newly stretched dust sampling membrane 10. After the sampling is completed, the right motor drives the right shaft 15 to rotate, thereby driving the second supporting gear 2 to rotate, releasing the second slide bar 12 on the right, while the left slide bar 12 remains stationary, which is conducive to releasing the sampled powder. The dust sampling membrane 10 is folded and stored, and the new dust sampling membrane 10 is stretched out for sampling. The above process can be repeated to sample the particulate matter in the air multiple times, and the dust sampling membrane 10 after sampling is folded and stored, which is convenient for the staff to take it later. At the same time, since the sizes of each dust sampling membrane 10 are the same, and the working time of the fan 8 is the same during the sampling process of a single dust sampling membrane 10, a single dust sampling membrane 10 is a sample of the particulate matter passing through the airflow within a specific time, that is, a single dust sampling membrane 10 is a detection of the airflow at a specific flow rate. The staff later detects the particulate matter retained on the single dust sampling membrane 10, and the particulate matter content in the airflow at a specific flow rate can be obtained, which is conducive to improving the accuracy of the detection.

[0036] At the same time, when the sliding rod 12 slides downward along the positioning rod 4, two adjacent sliding rods 12 will be stacked in the positioning, that is, the multiple sliding rods 12 that slide down the bottom end of the positioning rod 4 will be stacked together in sequence. The mutual contact of the multiple sliding rods 12 can play a sealing role, so that the airflow can only pass through the expanded dust sampling membrane 10, thereby further improving the accuracy of the test.

[0037] When all sampling is completed, the positioning rod 4 can be pulled out by the knob 22. At this time, the positioning rod 4 and the sliding rod 12 are separated from each other, and the staff can take out the dust sampling film 10 after sampling.

[0038] like Figure 4 As shown, a wind shield 3 is provided on one side of the shell 5 near the air inlet 1, and the wind shield 3 is in contact with the convex teeth 11 on the outside of the slide bar 12. This structure can prevent the airflow from flowing between the slide bar 12 and the top wall inside the shell 5, which is beneficial for the airflow to pass through the expanded dust sampling membrane 10, thereby ensuring that each dust sampling membrane 10 samples the airflow of the same flow rate, so as to improve the sampling accuracy.

[0039] like Figure 5-6As shown in FIG. 10 , connecting strips 14 are fixedly provided 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. A cavity 16 is provided inside the connecting strip 14, and magnetic particles, such as block or granular magnets, are filled inside the cavity 16. Magnetic areas 7 are provided on both the front and rear side walls inside the outer shell 5, and the magnetic area 7 is provided between the two positioning rods 4.

[0040] In actual use, when the sliding rod 12 falls and drives the dust sampling membrane 10 to move, the connecting strips 14 on the front and rear sides of the dust sampling membrane 10 will be adsorbed by the magnetic area 7 on the inner wall of the outer shell 5. Therefore, in the process of the sliding rod 12 driving the dust sampling membrane 10 to open, the connecting strip 14 will always slide in the magnetic area 7. The mutual adsorption between the magnetic area 7 and the connecting strip 14 can prevent the airflow from passing through the connecting strip 14 and the inner wall of the outer shell 5, thereby allowing the airflow to flow through the opened dust sampling membrane 10, which is beneficial to improving the sampling accuracy.

[0041] like Figure 3-4 , 7-10, a cover plate 13 is provided between two adjacent dust sampling membranes 10 in the vertical direction, one end of the cover plate 13 is hinged to the slide bar 12 on one side, and the other end of the cover plate 13 is mutually attracted to the slide bar 12 on the other side; Figure 1-2 As shown in the figure, the left end of the cover plate 13 at the bottom layer is hinged to the sliding rod 12 at the bottom end on the left side, and the right end of the cover plate 13 is mutually attracted to the second to last sliding rod 12 on the right side. At this time, when the sliding rod 12 at the bottom end on the left side slides downward along the positioning rod 4 to open the dust sampling membrane 10, due to the increase in the distance between the sliding rods 12 on both sides, when the sliding rod 12 at the bottom end on the left side slides to the inner bottom surface of the shell 5, the traction force on the cover plate 13 can drive the right end of the cover plate 13 to be moved with the right sliding rod 12. The rods 12 are separated from each other, so that the cover plate 13 moves downward together with the left sliding rod 12 and finally rotates to cover the top of the bottom dust sampling membrane 10. At this time, the cover plate 13 is placed between the two sliding rods 12 at the bottom, and the dust sampling membrane 10 is placed at the bottom of the cover plate 13. The dust sampling membrane 10 can be protected by the cover plate 13 to prevent the airflow from passing through the top of the dust sampling membrane 10 and blowing out the particles retained thereon during the next sampling, thereby maintaining the completeness of the sample;

[0042] The right end of the second-to-last cover plate 13 is hinged to the second-to-last sliding rod 12 on the right side, and the left end of this cover plate 13 is mutually attracted with the second-to-last sliding rod 12 on the left side. Therefore, when the second-to-last sliding rod 12 on the right side slides downward, it can drive this cover plate 13 to move downward, so that this cover plate 13 is disengaged from the sliding rod 12 on the left side and falls to the top of the dust sampling membrane 10 to cover and protect the sampled dust sampling membrane 10. According to the above-mentioned connection method, the cover plate 13 is hinged to the sliding rods 12 on both sides in turn, and the non-hinged end is mutually attracted with the sliding rod 12 on the other side. Through this structure, when the sampling of the dust sampling membrane 10 is completed, the sliding rod 12 slides downward, which can synchronously drive the cover plate 13 to slide downward and cover the sampled dust sampling membrane 10 to protect it, which is beneficial to maintain the completeness of the sampling of the dust sampling membrane 10, thereby improving the accuracy of the experimental data.

[0043] Specifically, a hinge block 17 is fixedly provided on the slide rod 12, and a groove 18 matching 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, and the hinge block 17 is rotatably connected to the inside of the groove 18 through the hinge shaft 19. In this way, the cover plate 13 is hinged to the slide rod 12, so that when the slide rod 12 slides down, it can drive the cover plate 13 to move downward.

[0044] A first magnetic sheet 20 is arranged on the side of the cover plate 13 away from the groove 18, and a second magnetic sheet 21 is arranged on the slide bar 12 adjacent thereto. The first magnetic sheet 20 and the second magnetic sheet 21 are attracted to each other, and both the first magnetic sheet 20 and the second magnetic sheet 21 are arranged in an arc shape. The cover plate 13 is attracted to the slide bar 12 in this way. When the slide bar 12 hinged to the cover plate 13 drives the cover plate 13 to move downward, the traction force of the slide bar 12 on the cover plate 13 causes the first magnetic sheet 20 and the second magnetic sheet 21 to separate from each other, so that the cover plate 13 falls off and covers the dust sampling film 10 to protect it.

Claims

1. A device for collecting atmospheric particulate matter, comprising a housing, wherein two ends of the housing are respectively provided with an air inlet and an air outlet, and a fan is provided at the air inlet, wherein: A sampling mechanism is provided inside the housing between the air inlet and the air outlet; The sampling mechanism includes sliding bars arranged on both sides of the housing, the sliding bars are arranged in two rows, the sliding bars in the two rows are staggered in the vertical direction, a dust sampling membrane is connected between two adjacent sliding bars in the horizontal direction, each layer of dust sampling membrane in the vertical direction is folded in sequence, the sliding bars on both sides slide down in sequence, driving each layer of dust sampling membrane to open in sequence to filter the airflow passing through, and the dust sampling membranes after sampling are stacked in sequence at the bottom end of the housing; The outer side of the slide bar is provided with a convex tooth, and the outer sides of the two rows of slide bars in the housing are provided with a first supporting gear and a second supporting gear respectively, and the first supporting gear and the second supporting gear are both meshed with the convex tooth on the outer side of the slide bar; A rotating shaft is arranged on the outer side of the two rows of slide bars. The rotating shaft at the first supporting gear passes through the first supporting gear and is fixedly connected to the first supporting gear. The rotating shaft at the second supporting gear passes through the second supporting gear and is fixedly connected to the second supporting gear. One end of the rotating shaft passes through the housing. One end of the rotating shaft on one side extends to the outside of the housing and is transmission-connected to the first motor. The other end of the rotating shaft on the other side extends to the outside of the housing and is transmission-connected to the second motor. Positioning rods are respectively arranged on both sides of the shell, and the positioning rods penetrate the slide rod and are slidably connected to the slide rod. A positioning hole matching the positioning rods is arranged at the bottom end of the shell, and the top end of the positioning rods passes through the shell and is slidably connected to the shell.

2. The device for collecting atmospheric particulate matter according to claim 1, characterized in that: A wind shield is arranged on one side of the shell near the air inlet, and the wind shield is in contact with the convex teeth on the outer side of the slide rod.

3. The device for collecting atmospheric particulate matter according to claim 1, characterized in that: The dust sampling membrane is fixedly provided with connecting strips on both the front and rear sides, the interior of the connecting strip is provided with a cavity, the interior of the cavity is filled with magnetic particles, and magnetic areas are provided on both the front and rear side walls inside the shell, and the magnetic areas are provided between two positioning rods.

4. The device for collecting atmospheric particulate matter according to claim 1, characterized in that: A cover plate is arranged between two adjacent dust sampling membranes in the vertical direction, one end of the cover plate is hinged to the sliding rod on one side, and the other end of the cover plate is mutually attracted to the sliding rod on the other side.

5. The device for collecting atmospheric particulate matter according to claim 4, characterized in that: A hinge block is fixedly arranged on the slide rod, a groove matching with the hinge block is arranged on the cover plate, a hinge shaft is arranged on the hinge block, the hinge shaft is arranged on the front and rear sides of the hinge block and fixed thereto, and the hinge block is rotatably connected to the inside of the groove via the hinge shaft.

6. The device for collecting atmospheric particulate matter according to claim 5, characterized in that: A first magnetic sheet is arranged on a side of the cover plate away from the groove, and a second magnetic sheet is arranged on the slide bar adjacent to the first magnetic sheet. The first magnetic sheet and the second magnetic sheet are attracted to each other, and both the first magnetic sheet and the second magnetic sheet are arranged in an arc shape.

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