An atmospheric environment particulate matter pollution monitoring device

Abstract

The present invention discloses an air environment particulate matter pollution monitoring device, which relates to the technical field of air monitoring devices and includes a support member, a backflush member, a cleaning member, and a movable member. In the present invention, by using the backflush assembly, the driving motor can drive the first lead screw to rotate, the first lead screw drives the movable disc to move downward, the movable disc moves downward to squeeze the airbag, so that the gas inside the airbag moves through the movable disc into the filter membrane and is discharged outward from the inside of the filter membrane. During the process of the gas being discharged outward, the particulate matter attached to the outer surface of the filter membrane can be moved outward, realizing the backflush of the filter membrane. And when the movable disc is separated from the airbag, the airbag can automatically expand and inflate, thereby performing multiple backwashes on the filter membrane, which can avoid the need to replace the filter membrane after each use, reduce the time and cost of filter membrane replacement, accelerate the speed of multiple measurements, and enable the filter membrane to be recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric monitoring devices, and specifically to an atmospheric environment particulate matter pollution monitoring device. Background Technique

[0002] Atmospheric particulate matter is the general term for various solid and liquid particulate substances existing in the atmosphere. All kinds of particulate substances are evenly dispersed in the air to form a relatively stable and huge suspension system, that is, an aerosol system. Therefore, atmospheric particulate matter is also called atmospheric aerosol. Aerosol is a multiphase system composed of particles and gas. Dust, fumes, smoke, fog, haze, etc. commonly seen all belong to the category of aerosols. When monitoring the content of atmospheric environment particulate matter, a Beta ray meter is usually used for measurement.

[0003] The Beta ray meter utilizes the principle of Beta ray attenuation. Ambient air is inhaled into the sampling tube by a sampling pump, discharged after passing through a filter membrane, and particulate matter precipitates on the filter membrane. When the β ray passes through the filter membrane deposited with particulate matter, the energy of the Beta ray attenuates, and the concentration of particulate matter can be calculated by measuring the attenuation amount.

[0004] When the existing Beta ray meter monitors the concentration of atmospheric environment particulate matter, when particulate matter adheres to the outer surface of the filter membrane, the filter membrane needs to be replaced in time. Otherwise, the particulate matter adhering to the outer surface of the filter membrane will affect the particulate matter concentration of the next measurement. When multiple measurements are required, frequently replacing the filter membrane will greatly waste the measurement time, and frequent replacement will increase the measurement cost. Summary of the Invention

[0005] The purpose of the present invention is to provide an atmospheric environment particulate matter pollution monitoring device to solve the problem that when the existing Beta ray meter monitors the concentration of atmospheric environment particulate matter, when particulate matter adheres to the outer surface of the filter membrane, the filter membrane needs to be replaced in time. Otherwise, the particulate matter adhering to the outer surface of the filter membrane will affect the particulate matter concentration of the next measurement. When multiple measurements are required, frequently replacing the filter membrane will greatly waste the measurement time, and frequent replacement will increase the measurement cost as mentioned in the above background technique.

[0006] To solve the above technical problems, an atmospheric environment particulate matter pollution monitoring device provided by the present invention includes:

[0007] A support member, the support member includes a housing;

[0008] A recoil member, the recoil member is fixedly connected to the inner position of the housing and includes a first lead screw sleeved at the central position inside the housing;

[0009] A cleaning member, the cleaning member is located outside the first lead screw and includes a scraper located outside the first lead screw;

[0010] The movable part is fixedly connected to the bottom end of the scraper, and includes a stopper fixedly connected to the outer side of the bottom end of the scraper.

[0011] By providing the support member and the backflush member, the concentration of particulate matter attached to the outer surface of the filter membrane can be measured, and after the measurement is completed, the filter membrane can be backflushed so that the particulate matter attached to the outer surface of the filter membrane can be separated from the outer surface of the filter membrane. And through the cleaning member, when the backflushed particulate matter adheres to the inner side surface of the filter net, the particulate matter can be cleaned, and the movable part can cause the particles on the inner side surface of the filter net to be discharged outward from the lower end of the filter net, so that the particulate matter will not move back to the outer surface of the filter membrane.

[0012] As a further scheme of the present invention: the support member further includes a base, a support rod, a support circular plate, a fixed ring and a filter membrane;

[0013] The support rod is fixedly connected to the central position of the upper end of the base, the support circular plate is fixedly connected to the top end of the support rod, the fixed ring is fixedly connected to the outer side of the upper end of the support circular plate, and the filter membrane is fixedly connected to the top end of the fixed ring.

[0014] The support rod is supported by the base, and the support circular plate is supported by the support rod, so that the support ring and the filter membrane are fixed on the upper end of the support circular plate, and particulate matter in the atmosphere can adhere to the outer surface of the filter membrane.

[0015] As a further scheme of the present invention: the backflush member further includes a protective cover, a reciprocating motor, a movable disc, an airbag and a ray instrument;

[0016] The protective cover is fixedly connected to the central position of the top end of the housing, the reciprocating motor is fixedly connected to the central position of the top end of the protective cover, the movable disc is threadedly connected to the outer surface of the first lead screw, the airbag is fixedly connected to the outer side of the top end of the support circular plate, and the ray instrument is fixedly connected to one side of the upper end of the movable disc.

[0017] The reciprocating motor drives the first lead screw to rotate, the first lead screw drives the movable disc to move, the movable disc moves downward to apply a downward pressure to the airbag, and the gas inside the airbag moves from the airbag to the inside of the filter membrane and is discharged outward. During the process of the gas being discharged outward from the inside of the filter membrane, the particulate matter attached to the outer surface of the filter membrane can be carried outwards, realizing the backflush of the filter membrane. And when the movable disc moves to not contact the airbag, the airbag rebounds to inflate. At the same time, when the movable disc moves downward to not contact the airbag, the ray instrument can emit β rays to measure the concentration of particulate matter on the outer surface of the filter membrane.

[0018] As a further solution of the present invention: the cleaning member further includes a sun gear, a planetary gear, a ring gear, a second lead screw, a movable column, a filter screen and a turntable;

[0019] The sun gear is sleeved on the outer surface of one end of the first lead screw, the planetary gears are engaged on both sides of the sun gear, the ring gear is fixedly connected to the outer side of the top end inside the housing, the second lead screw is fixedly connected to the bottom end of the planetary gear, the movable column is threadedly connected to the outer surface of the second lead screw, the filter screen is fixedly connected to the outer side of the bottom end of the ring gear, the turntable is clamped between the upper end of the supporting circular plate and the upper end of the bottom of the housing, and filter holes with the same aperture are provided on the outer surface of the housing and the outer surface of the filter screen.

[0020] By the rotation of the first lead screw, the first lead screw can drive the sun gear to rotate. While the sun gear drives the planetary gears to rotate along the outer side surface of the sun gear and the inner side surface of the ring gear, the planetary gears themselves also rotate. The rotation of the planetary gears drives the second lead screw to rotate, the second lead screw drives the movable column to move downward, and the movable column drives the scraper to move vertically downward along the upper end of the inner side surface of the filter screen, so that the scraper scrapes the particulate matter on the inner side surface of the filter screen downward.

[0021] As a further solution of the present invention: the movable member further includes a fixed column, a first movable plate, a support column, a telescopic spring and a second movable plate;

[0022] The fixed column is fixedly connected to the inner side position of the bottom end of the scraper, the first movable plate is placed above the turntable, the support column is fixedly connected to the central position of the bottom end of the first movable plate, the second movable plate is fixedly connected to the bottom end of the support column, and both ends of the telescopic spring are fixedly connected to the bottom end of the first movable plate and the upper end of the turntable respectively.

[0023] When the scraper moves downward, it can drive the baffle and the fixed column to move downward. The baffle blocks the particulate matter outside the baffle, and when the fixed column moves downward, it exerts a downward pressure on the first movable plate, so that while the first movable plate moves downward, it drives the second movable plate to move downward through the support column, so that the particulate matter outside the baffle can move downward through the gap on the outer side of the upper end of the turntable.

[0024] As a further solution of the present invention: the outer end of the first lead screw is fixedly connected to the output shaft of the reciprocating motor, the lower end of the first lead screw extends downward through the airbag, the bottom end of the first lead screw is sleeved on the central position of the upper end of the supporting circular plate, and the movable disc is located above the airbag.

[0025] The reciprocating motor is used to drive the first lead screw to rotate, and the compression and expansion of the airbag will not affect the rotation of the first lead screw, and when the movable disc moves downward, it can exert a downward pressure on the top end of the airbag.

[0026] As a further solution of the present invention: The planetary gear meshes with the toothed ring. The movable column is of an I-shaped structure. The scraper is sleeved on the central position of the outer surface of the movable column. The outer side of the scraper is attached to the inner side of the filter net, and the inner side of the scraper does not contact the outer surface of the filter membrane. The bottom end of the second lead screw is sleeved on both sides of the upper end of the turntable.

[0027] The movable column can move up and down under the drive of the second lead screw. And both sides of the planetary gear are meshed with the sun gear and the toothed ring respectively. When the planetary gear revolves under the drive of the sun gear, it can also rotate. The self-rotation of the planetary gear can drive the second lead screw at the central position of its bottom end to rotate.

[0028] As a further solution of the present invention: The telescopic spring is wound around the outer surface of the support column. And the second movable plate is clamped at the four-week position inside the turntable. And the first movable plate is located below the fixed column. The fixed column is located inside the stopper.

[0029] When the first movable plate moves downward, since the bottom end of the telescopic spring is blocked by the turntable, the telescopic spring is compressed. When the fixed column does not apply a downward pressure on the first movable plate, under the elastic force of the telescopic spring, the first movable plate, the support column and the second movable plate are reset, and the second movable plate closes the four-week position of the upper end of the turntable.

[0030] Compared with the prior art, the beneficial effects of the present invention are: By setting the backwashing member, the driving motor can drive the first lead screw to rotate. The first lead screw drives the movable disc to move downward. The downward movement of the movable disc squeezes the airbag, so that the gas inside the airbag moves through the movable disc into the filter membrane and is discharged outward from the inside of the filter membrane. During the process of the gas being discharged outward, the particulate matter attached to the outer surface of the filter membrane can be moved outward, realizing the backwashing of the filter membrane. And when the movable disc is separated from the airbag, the airbag can automatically expand and inflate, so as to perform multiple backwashes on the filter membrane, which can avoid the situation of needing to replace the filter membrane after each use, reduce the time and cost of filter membrane replacement, accelerate the speed of multiple measurements, and enable the filter membrane to be recycled;

[0031] Based on the first beneficial effect, when the filter membrane is backwashed, the first lead screw drives the sun gear to rotate. The sun gear drives the planetary gear to rotate along the sun gear and the toothed ring, and the planetary gear also rotates. The self-rotation of the planetary gear drives the second lead screw to rotate. The rotation of the second lead screw drives the movable column to move downward. The movable column drives the scraper to move downward from the upper end inside the filter net, scraping the particulate matter attached to the inner wall of the filter net, so that the filter net will not be affected by the attached particulate matter when collecting particulate matter next time;

[0032] Based on beneficial effect two, when the scraper scrapes the particulate matter, it is blocked outside the baffle by the baffle, and the scraper drives the fixed column to move downward to apply a downward force to the first movable block, causing the first movable block to move downward. The downward movement of the first movable block drives the support column and the second movable block to move downward. The downward movement of the second movable block does not enclose the periphery of the turntable, so that the particulate matter outside the baffle can be discharged downward from the inside of the turntable, so that the particulate matter will not stay inside the housing, further avoiding interference with the next measurement. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is the front view of the present invention;

[0035] Figure 2 It is the structural diagram of the support member of the present invention;

[0036] Figure 3 It is the structural diagram of the recoil member of the present invention;

[0037] Figure 4 It is the structural diagram of the cleaning member of the present invention;

[0038] Figure 5 It is the structural diagram of the movable member of the present invention.

[0039] In the drawings, the list of components represented by each reference numeral is as follows:

[0040] 11. Base; 12. Support rod; 13. Support circular plate; 14. Fixed ring; 15. Filter membrane; 16. Housing;

[0041] 21. Protective cover; 22. Reciprocating motor; 23. First lead screw; 24. Movable disc; 25. Airbag; 26. Ray instrument;

[0042] 31. Sun gear; 32. Planet gear; 33. Ring gear; 34. Second lead screw; 35. Movable column; 36. Scraper; 37. Filter net; 38. Turntable;

[0043] 41. Stop block; 42. Fixed column; 43. First movable plate; 44. Support column; 45. Telescopic spring; 46. Second movable plate. Detailed Embodiments

[0044] 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.

[0045] Please refer to Figures 1-3 , this embodiment is an atmospheric environment particulate matter pollution monitoring device, including: a support member, and the support member includes a housing 16;

[0046] A recoil member, the recoil member is fixedly connected to the inner position of the housing 16, and includes a first lead screw 23 sleeved at the central position inside the housing 16;

[0047] A cleaning member, the cleaning member is located outside the first lead screw 23, and includes a scraper 36 located outside the first lead screw 23;

[0048] A movable member, the movable member is fixedly connected to the bottom end of the scraper 36, and includes a stopper 41 fixedly connected to the outer side of the bottom end of the scraper 36;

[0049] The support member further includes a base 11, a support rod 12, a support circular plate 13, a fixed ring 14, and a filter membrane 15;

[0050] The support rod 12 is fixedly connected to the central position at the upper end of the base 11, the support circular plate 13 is fixedly connected to the top end of the support rod 12, the fixed ring 14 is fixedly connected to the outer side at the upper end of the support circular plate 13, and the filter membrane 15 is fixedly connected to the top end of the fixed ring 14;

[0051] The recoil member further includes a protective cover 21, a reciprocating motor 22, a movable disc 24, an airbag 25, and a ray instrument 26;

[0052] The protective cover 21 is fixedly connected to the central position at the top end of the housing 16, the reciprocating motor 22 is fixedly connected to the central position at the top end of the protective cover 21, the movable disc 24 is threadedly connected to the outer surface of the first lead screw 23, the airbag 25 is fixedly connected to the outer side at the top end of the support circular plate 13, and the ray instrument 26 is fixedly connected to one side at the upper end of the movable disc 24;

[0053] The outer end of the first lead screw 23 is fixedly connected to the output shaft of the reciprocating motor 22, the lower end of the first lead screw 23 penetrates through the airbag 25 and extends downward, the bottom end of the first lead screw 23 is sleeved at the central position at the upper end of the support circular plate 13, and the movable disc 24 is located above the airbag 25.

[0054] In this embodiment: When it is necessary to measure the concentration of particulate matter attached to the outer surface of the filter membrane 15, the reciprocating motor 22 is started. The reciprocating motor 22 drives the first lead screw 23 to rotate. The rotation of the first lead screw 23 drives the movable disk 24 to move downward. The movement of the movable disk 24 drives the ray instrument 26 to move downward. The ray instrument 26 emits β rays to measure the concentration of particulate matter on the outer surface of the filter membrane 15. After the measurement is completed, the reciprocating motor 22 is started continuously to make the movable disk 24 continue to move downward. The downward movement of the movable disk 24 squeezes the airbag 25. The gas inside the airbag 25 flows through the movable disk 24 into the filter membrane 15 and is discharged from the inside of the filter membrane 15 to the outside. The particulate matter attached to the outer surface of the filter membrane 15 is driven by the air flow and separated from the outer surface of the filter membrane 15, thereby realizing the backwashing of the filter membrane 15.

[0055] Please refer specifically to Figure 1 , Figure 3 , Figure 4 , an air environment particulate matter pollution monitoring device, the cleaning part further includes a sun gear 31, a planetary gear 32, a gear ring 33, a second lead screw 34, a movable column 35, a filter net 37 and a turntable 38;

[0056] The sun gear 31 is sleeved on the outer surface of one end of the first lead screw 23. The planetary gear 32 is engaged on both sides of the sun gear 31. The gear ring 33 is fixedly connected to the outer side of the top end inside the housing 16. The second lead screw 34 is fixedly connected to the bottom end of the planetary gear 32. The movable column 35 is threadedly connected to the outer surface of the second lead screw 34. The filter net 37 is fixedly connected to the outer side of the bottom end of the gear ring 33. The turntable 38 is clamped between the upper end of the support circular plate 13 and the upper end of the bottom of the housing 16. Filter holes with the same aperture are provided on the outer surface of the housing 16 and the outer surface of the filter net 37;

[0057] The planetary gear 32 is engaged with the gear ring 33. The movable column 35 is of an I-shaped structure. The scraper 36 is sleeved on the central position of the outer surface of the movable column 35. The outer side of the scraper 36 is in contact with the inner side of the filter net 37, and the inner side of the scraper 36 is not in contact with the outer surface of the filter membrane 15. The bottom end of the second lead screw 34 is sleeved on both sides of the upper end of the turntable 38;

[0058] In this embodiment: When backwashing the filter membrane 15, the first lead screw 23 drives the sun gear 31 to rotate. The sun gear 31 drives the planetary gear 32 to rotate. And the planetary gear 32 is limited by the gear ring 33, so that while the planetary gear 32 rotates around the sun gear 31, it rotates itself. The rotation of the planetary gear 32 drives the second lead screw 34 to rotate. The rotation of the second lead screw 34 drives the movable column 35 to move downward. The downward movement of the movable column 35 drives the scraper 36 to move downward. The downward movement of the scraper 36 scrapes the particulate matter on the inner surface of the filter net 37, so that the particulate matter detaches from the inner surface of the filter net 37.

[0059] Please refer specifically to Figure 1 、 Figure 4 、 Figure 5 . The movable part further includes a fixed column 42, a first movable plate 43, a support column 44, a telescopic spring 45 and a second movable plate 46;

[0060] The fixed column 42 is fixedly connected to the inner bottom end position of the scraper 36. The first movable plate 43 is placed above the turntable 38. The support column 44 is fixedly connected to the central position of the bottom end of the first movable plate 43. The second movable plate 46 is fixedly connected to the bottom end position of the support column 44. The two ends of the telescopic spring 45 are respectively fixedly connected to the bottom end of the first movable plate 43 and the upper end position of the turntable 38;

[0061] The telescopic spring 45 surrounds the outer surface position of the support column 44. And the second movable plate 46 is clamped to the inner peripheral position of the turntable 38. And the first movable plate 43 is located below the fixed column 42. The fixed column 42 is located inside the stopper 41;

[0062] In this embodiment: When the scraper 36 scrapes off the particulate matter on the inner surface of the filter screen 37, the particulate matter is blocked by the stopper 41, so that the particulate matter is outside the stopper 41. When the scraper 36 drives the fixed column 42 to move to the upper end of the first movable plate 43, the fixed column 42 drives the first movable plate 43 to move downward. The first movable plate 43 drives the second movable plate 46 to move downward through the support column 44. The second movable plate 46 does not block the upper inner part of the turntable 38, so that the particulate matter can fall downward through the inside of the turntable 38.

[0063] Working principle:

[0064] S1. First, start the reciprocating motor 22 to drive the first lead screw 23 to rotate. The first lead screw 23 drives the movable disc 24 to move downward. The movable disc 24 drives the ray instrument 26 to move downward, so that the ray instrument 26 measures the concentration of particulate matter attached to the outer surface of the filter membrane 15;

[0065] S2. After the measurement is completed, the reciprocating motor 22 continues to start, driving the movable disc 24 to continue to move downward. The movable disc 24 moves downward to squeeze the airbag 25, so that the gas inside the airbag 25 is discharged from the inside of the filter membrane 15 to the outside. The gas drives the particulate matter on the outer surface of the filter membrane 15 to flow outward, realizing the backwashing of the filter membrane 15;

[0066] S3. When backwashing the filter membrane 15, the first lead screw 23 drives the sun gear 31 to rotate, causing the planetary gear 32 to revolve and rotate under the drive of the sun gear 31 and the ring gear 33. The self-rotation of the planetary gear 32 drives the second lead screw 34 to rotate, and the second lead screw 34 drives the movable column 35 to move downward. The downward movement of the movable column 35 drives the scraper 36 to scrape the particulate matter on the inner surface of the filter net 37;

[0067] S4. After the scraper 36 scrapes the particulate matter, the particulate matter is blocked by the stopper 41 and remains outside the stopper 41. Moreover, the scraper 36 drives the fixed column 42 to move downward, the fixed column 42 drives the first movable plate 43 to move downward, and the first movable plate 43 drives the second movable plate 46 to move downward through the support column 44. The second movable plate 46 does not seal the turntable 38, allowing the particulate matter to fall downward through the inside of the turntable 38;

[0068] S5. When the first movable plate 43 moves downward, the first movable plate 43 exerts a downward force on the telescopic spring 45. The bottom end of the telescopic spring 45 is blocked by the upper end of the turntable 38, causing the telescopic spring 45 to be compressed. When the fixed column 42 moves upward and separates from the first movable plate 43, driven by the telescopic spring 45, the first movable plate 43, the support column 44, and the second movable plate 46 are reset. The second movable plate 46 seals the turntable 38, and the outer shell 16 and the filter net 37 intersect, sealing the outer shell 16, thereby keeping the inside of the outer shell 16 clean.

[0069] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An atmospheric particulate matter pollution monitoring device, characterized in that: include: A support member, the support member comprising a housing (16); A recoil member, the recoil member being fixedly connected to a position inside the housing (16), and comprising a first screw rod (23) sleeved at a central position inside the housing (16); A cleaning member, the cleaning member being located outside the first screw rod (23), and comprising a scraper (36) located outside the first screw rod (23); A movable part, the movable part is fixedly connected to the bottom end of the scraper (36), and comprises a stopper (41) fixedly connected to the outer side of the bottom end of the scraper (36); The support member further comprises a base (11), a support rod (12), a support circular plate (13), a fixing circular ring (14) and a filter membrane (15); The support rod (12) is fixedly connected to the central position of the upper end of the base (11), the support circular plate (13) is fixedly connected to the top position of the support rod (12), the fixed circular ring (14) is fixedly connected to the outer position of the upper end of the support circular plate (13), and the filter membrane (15) is fixedly connected to the top position of the fixed circular ring (14); The recoil member also includes a protective cover (21), a reciprocating motor (22), a movable disc (24), an air bag (25) and a ray instrument (26); The protective cover (21) is fixedly connected to the central position of the top of the housing (16), the reciprocating motor (22) is fixedly connected to the central position of the top of the protective cover (21), the movable disc (24) is threadedly connected to the outer surface of the first screw rod (23), the air bag (25) is fixedly connected to the outer position of the top of the supporting circular plate (13), and the ray instrument (26) is fixedly connected to one side of the upper end of the movable disc (24); The cleaning member further comprises a sun gear (31), a planetary gear (32), a gear ring (33), a second screw rod (34), a movable column (35), a filter screen (37) and a rotating disk (38); The sun gear (31) is sleeved on the outer surface of one end of the first screw rod (23), the planetary gears (32) are meshed with the positions on both sides of the sun gear (31), the gear ring (33) is fixedly connected to the outer position of the top end of the housing (16), the second screw rod (34) is fixedly connected to the bottom end of the planetary gear (32), the movable column (35) is threadedly connected to the outer surface of the second screw rod (34), the filter screen (37) is fixedly connected to the outer position of the bottom end of the gear ring (33), the rotating disk (38) is clamped to the upper end of the supporting circular plate (13) and the upper end of the bottom of the housing (16), and the outer surface of the housing (16) and the outer surface of the filter screen (37) are provided with filter holes of the same aperture; The movable member further comprises a fixed column (42), a first movable plate (43), a supporting column (44), a telescopic spring (45) and a second movable plate (46); The fixed column (42) is fixedly connected to the inner side of the bottom end of the scraper (36), the first movable plate (43) is placed above the rotating disk (38), the support column (44) is fixedly connected to the center of the bottom end of the first movable plate (43), the second movable plate (46) is fixedly connected to the bottom end of the support column (44), and the two ends of the telescopic spring (45) are respectively fixedly connected to the bottom end of the first movable plate (43) and the upper end of the rotating disk (38); The outer end of the first screw rod (23) is fixedly connected to the output shaft of the reciprocating motor (22), the lower end of the first screw rod (23) passes through the airbag (25) and extends downward, the bottom end of the first screw rod (23) is sleeved at the central position of the upper end of the supporting circular plate (13), and the movable disc (24) is located above the airbag (25).

2. The atmospheric particulate matter pollution monitoring device according to claim 1, characterized in that: The planetary gear (32) and the gear ring (33) are meshed with each other, the movable column (35) is an I-shaped structure, the scraper (36) is sleeved at the central position of the outer surface of the movable column (35), the outer side of the scraper (36) and the inner side of the filter screen (37) are in contact, and the inner side of the scraper (36) does not contact the outer surface of the filter membrane (15), and the bottom end of the second screw rod (34) is sleeved at the positions on both sides of the upper end of the rotating disk (38).

3. The atmospheric particulate matter pollution monitoring device according to claim 1, characterized in that: The telescopic spring (45) surrounds the outer surface of the support column (44), and the second movable plate (46) is clamped on the inner periphery of the rotating disk (38), and the first movable plate (43) is located below the fixed column (42), and the fixed column (42) is located inside the stopper (41).

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