Atmospheric aerosol sampling device

Abstract

The invention provides an atmospheric aerosol sampling device, which belongs to the technical field of aerosol collection, and comprises a sampling shell and a sampling pipeline, one end of the sampling pipeline is communicated with the top of the sampling shell to form a sampling end; the other end of the sampling pipeline is communicated with the side wall of the sampling shell; the sampling device further comprises an upper pressing ring, a lower pressing ring, an upper sealing plate, a lower sealing plate and a driving mechanism; the upper pressing ring and the lower pressing ring are detachably connected; wherein the sampling shell is provided with a limiting structure; the driving mechanism is arranged at the top of the sampling shell; the driving end of the driving mechanism is used for driving the upper pressing ring and the lower pressing ring to slide. Before sampling, the upper sealing plate and the lower sealing plate can seal the sampling assembly; after sampling, the driving mechanism can pull the sampling assembly back between the upper sealing plate and the lower sealing plate, the sampling assembly can also be sealed, an operator does not need to additionally conduct sealing operation, and the efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aerosol collection, and in particular relates to an atmospheric aerosol sampling device. Background Art

[0002] Atmospheric aerosols are a suspension of liquid or solid particles in the air, which can directly or indirectly affect the atmospheric radiation balance and climate; therefore, it is necessary to sample aerosols in the atmosphere and analyze their composition. It is currently known that aerosols have a distinct vertical distribution, that is, the physical and chemical properties of aerosols are different at different altitudes.

[0003] The collection equipment in the prior art includes a box and a ventilation pipe, wherein the ventilation pipe is located in the box, and both ends of the ventilation pipe are connected to the side wall of the box; one end of the ventilation pipe is a sampling end, and a filter membrane is provided at the sampling end, and the position of the filter membrane is fixed by a cover ring. After the filter membrane is fixed, the air pump is started to allow the atmosphere to pass through the pipe, and the aerosol in the atmosphere will remain on the filter membrane, thereby completing the collection of atmospheric aerosol.

[0004] After collecting atmospheric aerosols in the above manner, the filter membrane needs to be sealed and preserved to reduce the natural sedimentation of aerosols in the air onto the filter membrane, and then the filter membrane is taken to the laboratory for subsequent processing; the sealing method in the prior art requires the operator to remove the filter membrane from the box body and then place the filter membrane in a sealed box; the above sealing process is inefficient. Summary of the invention

[0005] An embodiment of the present invention provides an atmospheric aerosol sampling device, which is intended to facilitate sealing of a filter membrane after sampling.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An atmospheric aerosol sampling device is provided, comprising a sampling housing and a sampling pipeline arranged in the sampling housing; one end of the sampling pipeline is connected to the top of the sampling housing to form a sampling end; the other end of the sampling pipeline is connected to the side wall of the sampling housing; the sampling device also includes:

[0008] The upper pressure ring and the lower pressure ring are detachably connected; the upper pressure ring and the lower pressure ring are used to clamp the filter membrane; the top of the sampling housing has a placement area for placing the lower pressure ring;

[0009] An upper sealing plate, contacting the upper pressure ring and closing the top opening of the upper pressure ring;

[0010] A lower sealing plate contacts the lower pressure ring and closes the bottom opening of the lower pressure ring; the upper sealing plate and the lower sealing plate are connected by a connecting component; wherein the sampling housing has a limiting structure for horizontally limiting the lower sealing plate, and the upper surface of the sampling end is coplanar with the upper surface of the lower sealing plate;

[0011] A driving mechanism is arranged at the top of the sampling shell; the driving end of the driving mechanism is detachably connected to the outer peripheral wall of the upper pressure ring or the outer peripheral wall of the lower pressure ring; wherein the driving end of the driving mechanism is used to drive the upper pressure ring and the lower pressure ring to slide so that the filter membrane is at the position of the sampling end or between the upper sealing plate and the lower sealing plate.

[0012] In a possible implementation, the connecting component includes a protrusion provided on the outer peripheral wall of the upper sealing plate and the lower sealing plate and a connecting rod, the protrusions of the upper sealing plate and the lower sealing plate respectively have threaded holes aligned with each other, the connecting rod has an external thread, and the connecting rod is threadedly matched with the protrusions on the upper sealing plate and the lower sealing plate;

[0013] Wherein, the top of the sampling housing is provided with a slot, and the slot is plug-fitted with the lower sealing plate and the protrusion on the lower sealing plate to horizontally limit the lower sealing plate.

[0014] In a possible implementation, the connecting component includes a protrusion provided on the outer peripheral wall of the upper sealing plate and the lower sealing plate and a connecting rod, the protrusions of the upper sealing plate and the lower sealing plate respectively have threaded holes aligned with each other, the connecting rod has an external thread, and the connecting rod is threadedly matched with the protrusions on the upper sealing plate and the lower sealing plate;

[0015] Wherein, the top of the sampling housing is provided with a slot, and the slot is plug-fitted with the lower sealing plate and the protrusion on the lower sealing plate to horizontally limit the lower sealing plate.

[0016] In a possible implementation, the bottom wall of the slot has a plug hole, the bottom end of the connecting rod protrudes out of the lower sealing plate, and the protruding end of the connecting rod is plugged into and matched with the plug hole of the slot;

[0017] Wherein, when the connecting rod is plugged into the jack, the lower sealing plate and the sampling housing are relatively fixed in the horizontal direction.

[0018] In a possible implementation, the driving mechanism includes:

[0019] A limit block connected to the outer peripheral wall of the upper pressure ring or the outer peripheral wall of the lower pressure ring; the bottom of the limit block is provided with a slide groove, the outer side of the limit block is provided with a strip hole connected with the slide groove, and the strip hole is arranged along the height direction;

[0020] The plug-in part can be plugged and matched with the slide slot; the two ends of the plug-in part are in contact with the two opposite sides of the slide slot to axially limit the plug-in part; wherein the plug-in part is connected to a connecting rod for passing through the strip hole;

[0021] An electric push rod is connected to the top of the sampling housing; a driving end of the electric push rod is connected to the connecting rod.

[0022] In a possible implementation, a filter screen is provided on the top of the sampling housing just above the sampling end, and the filter screen is connected to the sampling housing via a supporting component;

[0023] When the upper pressure ring and the lower pressure ring slide to the position of the sampling end, the bottom of the lower pressure ring contacts the top of the sampling end, and the top of the upper pressure ring contacts the bottom of the filter screen.

[0024] In a possible implementation, the supporting component includes:

[0025] A support rod has one end connected to the top of the sampling housing and the other end plugged into and matched with the bottom of the filter screen; the bottom of the filter screen has a groove plugged into and matched with the support rod.

[0026] In a possible implementation, the sampling pipeline includes:

[0027] A conical sampling cylinder is arranged in the sampling housing; the top end of the conical sampling cylinder passes through the top of the sampling housing; the bottom end of the conical sampling cylinder has a threaded sleeve;

[0028] An exhaust pipe, one end of which is connected to the side wall of the sampling housing; an outer peripheral wall of the other end of the exhaust pipe is provided with an external thread, and the other end of the exhaust pipe is threadably matched with a threaded sleeve;

[0029] A fan is connected to the exhaust pipe; the air flow direction of the fan is from the conical sampling cylinder to the exhaust pipe.

[0030] In a possible implementation, a positioning ring is connected to the outer peripheral wall of the threaded end of the exhaust pipe, and the positioning ring can contact the bottom of the threaded sleeve to limit the installation position of the conical sampling cylinder.

[0031] In a possible implementation, the bottom of the fan contacts the bottom wall in the sampling housing, the conical sampling cylinder is plug-fitted with the top of the sampling housing, and one end of the exhaust pipe is plug-fitted with the sampling housing.

[0032] In a possible implementation, the sampling device further includes a running mechanism, and the sampling housing is arranged on the running mechanism so that the sampling housing moves to a preset sampling location.

[0033] Compared with the prior art, the atmospheric aerosol sampling device provided by the present invention is, for the convenience of description, an upper pressure ring, a lower pressure ring and a filter membrane are collectively referred to as a sampling assembly; in the initial state, the sampling assembly is located between the upper sealing plate and the lower sealing plate, and can play a sealing role; when the sampling shell is placed in a preset position and ready for sampling, the upper sealing plate and the lower sealing plate are placed in the placement area, at which time, the lower sealing plate is connected to the sampling shell through a connecting component to limit the lower sealing plate in the horizontal direction; then the driving end of the driving mechanism pushes the sampling assembly to the sampling end, at which time, sampling can be performed. After the sampling is completed, the driving end of the driving mechanism pulls the sampling assembly back between the upper sealing plate and the lower sealing plate to seal the sampling assembly; at this time, the driving end of the driving mechanism is separated from the sampling assembly, which is convenient for the operator to take the sampling assembly. Through the above-mentioned arrangement of the present application, before sampling, the upper sealing plate and the lower sealing plate can seal the sampling assembly; after sampling, the driving mechanism can pull the sampling assembly back between the upper sealing plate and the lower sealing plate, and can also seal the sampling assembly, without the operator having to perform additional sealing operations, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a state in which a filter membrane of an atmospheric aerosol sampling device provided by an embodiment of the present invention is pushed to a sampling end position;

[0036] Figure 3 A schematic diagram of an upper sealing plate and a lower sealing plate portion of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0037] Figure 4 for Figure 3 The enlarged schematic diagram of the middle A part;

[0038] Figure 5 A schematic diagram of a sampling housing portion of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a filter screen plate portion of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0040] Figure 7 A schematic diagram of a sampling pipeline portion of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0041] Figure 8 A cross-sectional view of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0042] Fig. 9 A schematic diagram of a limit block portion of an atmospheric aerosol sampling device provided by an embodiment of the present invention;

[0043] Fig.10 A schematic diagram of the stacked state of two sets of filter membranes of an atmospheric aerosol sampling device provided by an embodiment of the present invention.

[0044] Explanation of the accompanying drawings: 1. sampling shell; 11. placement area; 12. slot; 13. socket; 14. filter screen; 141. groove; 15. support component; 16. baffle; 2. sampling pipeline; 21. sampling end; 22. conical sampling cylinder; 23. exhaust pipe; 24. fan; 25. threaded sleeve; 26. positioning ring; 3. upper pressure ring; 31. annular hole; 4. lower pressure ring; 41. annular protrusion; 5. upper sealing plate; 6. lower sealing plate; 7. driving mechanism; 71. limit block; 711. slide groove; 712. strip hole; 72. plug-in part; 73. electric push rod; 74. connecting rod; 8. filter membrane; 9. connecting component; 91. protrusion; 92. connecting rod. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] Please also read Figures 1 to 10, an atmospheric aerosol sampling device provided by the present invention is now described. The atmospheric aerosol sampling device comprises a sampling shell 1 and a sampling pipe 2 arranged in the sampling shell 1; one end of the sampling pipe 2 is connected to the top of the sampling shell 1 to form a sampling end 21; the other end of the sampling pipe 2 is connected to the side wall of the sampling shell 1; the sampling device also includes an upper pressure ring 3, a lower pressure ring 4, an upper sealing plate 5, a lower sealing plate 6 and a driving mechanism 7; the upper pressure ring 3 and the lower pressure ring 4 are detachably connected; the upper pressure ring 3 and the lower pressure ring 4 are used to clamp the filter membrane 8; the top of the sampling shell 1 has a placement area 11 for placing the lower pressure ring 4; the upper sealing plate 5 contacts the upper pressure ring 3 and closes the top opening of the upper pressure ring 3; the lower The sealing plate 6 contacts the lower pressure ring 4 and closes the bottom opening of the lower pressure ring 4; the upper sealing plate 5 and the lower sealing plate 6 are connected by a connecting component 9; wherein, the sampling shell 1 has a limiting structure for horizontally limiting the lower sealing plate 6, and the upper surface of the sampling end 21 is coplanar with the upper surface of the lower sealing plate 6; the driving mechanism 7 is arranged at the top of the sampling shell 1; the driving end of the driving mechanism 7 is detachably connected to the outer peripheral wall of the upper pressure ring 3 or the outer peripheral wall of the lower pressure ring 4; wherein, the driving end of the driving mechanism 7 is used to drive the upper pressure ring 3 and the lower pressure ring 4 to slide, so that the filter membrane 8 is at the position of the sampling end 21 or between the upper sealing plate 5 and the lower sealing plate 6.

[0047] Compared with the prior art, the present invention provides an atmospheric aerosol sampling device. For the convenience of description, the upper pressure ring 3, the lower pressure ring 4 and the filter membrane 8 are collectively referred to as a sampling assembly; in the initial state, the sampling assembly is located between the upper sealing plate 5 and the lower sealing plate 6, which can play a sealing role; when the sampling shell 1 is placed in a preset position and ready for sampling, the upper sealing plate 5 and the lower sealing plate 6 are placed in the placement area 11, at which time, the lower sealing plate 6 is connected to the sampling shell 1 through the connecting component 9 to limit the lower sealing plate 6 in the horizontal direction; then the driving end of the driving mechanism 7 pushes the sampling assembly to the sampling end 21, at which time, sampling can be performed. After the sampling is completed, the driving end of the driving mechanism 7 pulls the sampling assembly back between the upper sealing plate 5 and the lower sealing plate 6 to seal the sampling assembly; at this time, the driving end of the driving mechanism 7 is separated from the sampling assembly, which is convenient for the operator to take the sampling assembly. Through the above-mentioned arrangement of the present application, before sampling, the upper sealing plate 5 and the lower sealing plate 6 can seal the sampling component; after sampling, the driving mechanism 7 can pull the sampling component back between the upper sealing plate 5 and the lower sealing plate 6, and can also seal the sampling component, without the need for the operator to perform additional sealing operations, thereby improving efficiency.

[0048] Exemplarily, the bottom of the upper pressure ring 3 has an annular hole 31, and the annular hole 31 has an internal thread; the top of the lower pressure ring 4 has an annular protrusion 41, and the annular protrusion 41 has an external thread, and the annular protrusion 41 is threadedly matched with the annular hole 31; through the threaded matching of the annular protrusion 41 and the annular hole 31, the upper pressure ring 3 and the lower pressure ring 4 can clamp the filter membrane 8.

[0049] In some embodiments, Figures 1 to 10 As shown, the connecting component 9 includes a protrusion 91 and a connecting rod 92 arranged on the outer peripheral wall of the upper sealing plate 5 and the lower sealing plate 6, respectively, the protrusions 91 of the upper sealing plate 5 and the lower sealing plate 6 have threaded holes aligned with each other, the connecting rod 92 has an external thread, and the connecting rod 92 is threadedly matched with the protrusions 91 on the upper sealing plate 5 and the lower sealing plate 6; wherein, the top of the sampling housing 1 has a slot 12, the slot 12 is plugged and matched with the lower sealing plate 6 and the protrusion 91 on the lower sealing plate 6 to horizontally limit the lower sealing plate 6. The bottom wall of the slot 12 has a socket 13, the bottom end of the connecting rod 92 protrudes from the lower sealing plate 6, and the protruding end of the connecting rod 92 is plugged and matched with the socket 13 of the slot 12; wherein, when the connecting rod 92 is plugged and matched with the socket 13, the lower sealing plate 6 and the sampling housing 1 are relatively fixed in the horizontal direction. The limiting structure includes a slot 12 and a socket 13. The upper sealing plate 5 and the lower sealing plate 6 can be limited in the horizontal direction by plugging and matching the bottom end of the connecting rod 92 with the socket 13.

[0050] It should be noted that there are two protrusions 91 on the upper sealing plate 5, and the two protrusions 91 are relatively arranged on the upper sealing plate 5; there are two protrusions 91 on the lower sealing plate 6, and the two protrusions 91 are relatively arranged on the lower sealing plate 6; the bottom wall of the protrusion 91 of the upper sealing plate 5 has a threaded sleeve, and the connecting rod 92 is threadedly matched with the threaded sleeve; through the above arrangement, the top of the connecting rod 92 can be located in the threaded hole of the upper sealing plate 5, and the bottom end of the connecting rod 92 passes through the protrusion 91 of the lower sealing plate 6, so that the bottom end of the connecting rod 92 can be plugged and matched with the socket 13 of the slot 12.

[0051] The upper sealing plate 5 and the lower sealing plate 6 are connected by the connecting rod 92, so that the upper sealing plate 5 and the lower sealing plate 6 can seal the sampling assembly; the upper sealing plate 5 and the lower sealing plate 6 can be limited in the horizontal direction by plugging and matching the bottom end of the connecting rod 92 with the socket 13 of the slot 12. Therefore, when the driving mechanism 7 drives the sampling assembly horizontally, the positions of the upper sealing plate 5 and the lower sealing plate 6 can be kept unchanged, so that the sampling assembly is located at the sampling end 21. When the driving mechanism 7 pulls back the sampling assembly, the sampling assembly can slide back between the upper sealing plate 5 and the lower sealing plate 6, and the sampling assembly after sampling is completed can be sealed without the need for the operator to perform the sealing operation.

[0052] In some embodiments, Figures 1 to 10As shown, the driving mechanism 7 includes a limit block 71, a plug-in portion 72 and an electric push rod 73; the limit block 71 is connected to the outer peripheral wall of the upper pressure ring 3 or the outer peripheral wall of the lower pressure ring 4; the bottom of the limit block 71 has a slide groove 711, and the outer side of the limit block 71 has a strip hole 712 connected to the slide groove 711, and the strip hole 712 is arranged along the height direction; the plug-in portion 72 can be plugged and matched with the slide groove 711; the two ends of the plug-in portion 72 are in contact with the opposite sides of the slide groove 711 to axially limit the plug-in portion 72; wherein, the plug-in portion 72 is connected to a connecting rod 74 for passing through the strip hole 712; the electric push rod 73 is connected to the top of the sampling shell 1; the driving end of the electric push rod 73 is connected to the connecting rod 74.

[0053] Exemplarily, this embodiment is described in a manner that the limit block 71 is fixed to the upper pressure ring 3; the width of the slide groove 711 on the limit block 71 is greater than the width of the strip hole 712, and the strip hole 712 is connected to the bottom of the limit block 71; when the upper sealing plate 5 and the lower sealing plate 6 are placed on the top of the sampling shell 1, the bottom end of the connecting rod 92 is inserted into the socket 13 at the top of the sampling shell 1, and the plug-in portion 72 is plugged into and matched with the slide groove 711; by pushing the connecting rod 74 through the electric push rod 73, the sampling assembly can slide to the sampling end 21 of the sampling shell 1, which is convenient for sampling atmospheric aerosols.

[0054] In some embodiments, Figures 1 to 10 As shown, the top of the sampling housing 1 is provided with a filter screen 14 just above the sampling end 21, and the filter screen 14 is connected to the sampling housing 1 through a support component 15; wherein, when the upper pressure ring 3 and the lower pressure ring 4 slide to the position of the sampling end 21, the bottom of the lower pressure ring 4 contacts the top of the sampling end 21, and the top of the upper pressure ring 3 contacts the bottom of the filter screen 14. The support component 15 includes a support rod; one end of the support rod is connected to the top of the sampling housing 1, and the other end is plugged in with the bottom of the filter screen 14; the bottom of the filter screen 14 has a groove 141 plugged in with the support rod.

[0055] Exemplarily, by setting a filter screen 14 directly above the sampling housing 1, when the sampling assembly slides to the sampling end 21, the filter screen 14 contacts the upper pressure ring 3, which can play a filtering role and reduce large debris entering the upper pressure ring 3.

[0056] By providing a groove 141 at the bottom of the filter screen plate 14 and inserting and matching the groove 141 with the support rod, the filter screen plate 14 can be stably located on the top of the sampling housing 1 .

[0057] It should be noted that there are several support rods, and by providing multiple support rods, the stability of supporting the filter screen plate 14 can be improved.

[0058] In some embodiments, Figures 1 to 10As shown, the sampling pipeline 2 includes a conical sampling barrel 22, an exhaust pipe 23 and a fan 24; the conical sampling barrel 22 is arranged in the sampling housing 1; the top of the conical sampling barrel 22 passes through the top of the sampling housing 1; the bottom of the conical sampling barrel 22 has a threaded sleeve 25; one end of the exhaust pipe 23 is connected to the side wall of the sampling housing 1; the outer peripheral wall of the other end of the exhaust pipe 23 has an external thread, and the other end of the exhaust pipe 23 is threadedly matched with the threaded sleeve 25; the fan 24 is connected to the exhaust pipe 23; the airflow direction of the fan 24 is from the conical sampling barrel 22 to the exhaust pipe 23. The bottom of the fan 24 contacts the bottom wall in the sampling housing 1, the conical sampling barrel 22 is plugged and matched with the top of the sampling housing 1, and one end of the exhaust pipe 23 is plugged and matched with the sampling housing 1.

[0059] Exemplarily, one side of the sampling shell 1 has an opening, and a baffle 16 is provided at the opening position, and the baffle 16 is connected to the open end of the sampling shell 1 by bolts; when installing the sampling pipeline 2, the conical sampling barrel 22 is first plugged into the top of the sampling shell 1, and then the exhaust pipe 23 is plugged into the side wall of the sampling shell 1. At this time, the bottom of the fan 24 contacts the bottom wall inside the sampling shell 1; then the conical sampling barrel 22 slides downward, and the threaded sleeve 25 is threadedly engaged with the exhaust pipe 23; after the conical sampling barrel 22 and the exhaust pipe 23 are fully engaged, the conical sampling barrel 22 and the exhaust pipe 23 can be stably fixed in the sampling shell 1.

[0060] After the fan 24 is started, the atmosphere can pass through the filter membrane 8 into the conical sampling cylinder 22 and be discharged from the exhaust pipe 23, so as to facilitate the collection of atmospheric aerosols.

[0061] In some embodiments, Figures 1 to 10 As shown, a positioning ring 26 is connected to the outer peripheral wall of the threaded end of the exhaust pipe 23 , and the positioning ring 26 can contact the bottom of the threaded sleeve 25 to limit the installation position of the conical sampling cylinder 22 .

[0062] It should be noted that, by providing a positioning ring 26 on the exhaust pipe 23 , the connection position of the conical sampling cylinder 22 can be limited, so that both the conical sampling cylinder 22 and the exhaust pipe 23 are plugged into the sampling housing 1 .

[0063] In some embodiments, Figures 1 to 10 As shown, the sampling device further comprises a running mechanism, and the sampling housing 1 is arranged on the running mechanism so that the sampling housing 1 moves to a preset sampling location.

[0064] It should be noted that the walking mechanism may be a cart or other movable mechanisms; the sampling housing 1 can be transported to a preset sampling location through the walking structure.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An atmospheric aerosol sampling device, characterized in that: The sampling device comprises a sampling housing and a sampling pipeline arranged in the sampling housing; one end of the sampling pipeline is connected to the top of the sampling housing to form a sampling end; the other end of the sampling pipeline is connected to the side wall of the sampling housing; the sampling device also comprises: The upper pressure ring and the lower pressure ring are detachably connected; the upper pressure ring and the lower pressure ring are used to clamp the filter membrane; the top of the sampling housing has a placement area for placing the lower pressure ring; An upper sealing plate, contacting the upper pressure ring and closing the top opening of the upper pressure ring; A lower sealing plate contacts the lower pressure ring and closes the bottom opening of the lower pressure ring; the upper sealing plate and the lower sealing plate are connected by a connecting component; wherein the sampling housing has a limiting structure for horizontally limiting the lower sealing plate, and the upper surface of the sampling end is coplanar with the upper surface of the lower sealing plate; A driving mechanism is arranged at the top of the sampling shell; the driving end of the driving mechanism is detachably connected to the outer peripheral wall of the upper pressure ring or the outer peripheral wall of the lower pressure ring; wherein the driving end of the driving mechanism is used to drive the upper pressure ring and the lower pressure ring to slide so that the filter membrane is at the position of the sampling end or between the upper sealing plate and the lower sealing plate.

2. An atmospheric aerosol sampling device as claimed in claim 1, characterized in that: The connecting component comprises a protrusion provided on the outer peripheral wall of the upper sealing plate and the lower sealing plate and a connecting rod, the protrusions of the upper sealing plate and the lower sealing plate respectively have threaded holes aligned with each other, the connecting rod has an external thread, and the connecting rod is threadedly matched with the protrusions on the upper sealing plate and the lower sealing plate; Wherein, the top of the sampling housing is provided with a slot, and the slot is plug-fitted with the lower sealing plate and the protrusion on the lower sealing plate to horizontally limit the lower sealing plate.

3. An atmospheric aerosol sampling device as claimed in claim 2, characterized in that: The bottom wall of the slot has an insertion hole, the bottom end of the connecting rod protrudes out of the lower sealing plate, and the protruding end of the connecting rod is plugged into and matched with the insertion hole of the slot; Wherein, when the connecting rod is plugged into the jack, the lower sealing plate and the sampling housing are relatively fixed in the horizontal direction.

4. An atmospheric aerosol sampling device as claimed in claim 1, characterized in that: The driving mechanism comprises: A limit block connected to the outer peripheral wall of the upper pressure ring or the outer peripheral wall of the lower pressure ring; the bottom of the limit block is provided with a slide groove, the outer side of the limit block is provided with a strip hole connected with the slide groove, and the strip hole is arranged along the height direction; The plug-in part can be plugged and matched with the slide slot; the two ends of the plug-in part are in contact with the two opposite sides of the slide slot to axially limit the plug-in part; wherein the plug-in part is connected to a connecting rod for passing through the strip hole; An electric push rod is connected to the top of the sampling housing; a driving end of the electric push rod is connected to the connecting rod.

5. An atmospheric aerosol sampling device as claimed in claim 1, characterized in that: A filter screen is provided on the top of the sampling housing just above the sampling end, and the filter screen is connected to the sampling housing through a supporting component; When the upper pressure ring and the lower pressure ring slide to the position of the sampling end, the bottom of the lower pressure ring contacts the top of the sampling end, and the top of the upper pressure ring contacts the bottom of the filter screen.

6. An atmospheric aerosol sampling device as claimed in claim 5, characterized in that: The supporting member comprises: A support rod has one end connected to the top of the sampling housing and the other end plugged into and matched with the bottom of the filter screen; the bottom of the filter screen has a groove plugged into and matched with the support rod.

7. An atmospheric aerosol sampling device as claimed in claim 1, characterized in that: The sampling pipeline comprises: A conical sampling cylinder is arranged in the sampling housing; the top end of the conical sampling cylinder passes through the top of the sampling housing; the bottom end of the conical sampling cylinder has a threaded sleeve; An exhaust pipe, one end of which is connected to the side wall of the sampling housing; an outer peripheral wall of the other end of the exhaust pipe is provided with an external thread, and the other end of the exhaust pipe is threadably matched with a threaded sleeve; A fan is connected to the exhaust pipe; the air flow direction of the fan is from the conical sampling cylinder to the exhaust pipe.

8. An atmospheric aerosol sampling device as claimed in claim 7, characterized in that: A positioning ring is connected to the outer peripheral wall of the threaded end of the exhaust pipe, and the positioning ring can contact the bottom of the threaded sleeve to limit the installation position of the conical sampling cylinder.

9. An atmospheric aerosol sampling device as claimed in claim 7, characterized in that: The bottom of the fan contacts the bottom wall of the sampling shell, the conical sampling cylinder is plugged into and matched with the top of the sampling shell, and one end of the exhaust pipe is plugged into and matched with the sampling shell.

10. An atmospheric aerosol sampling device as claimed in claim 1, characterized in that: The sampling device also includes a walking mechanism, and the sampling housing is arranged on the walking mechanism so that the sampling housing moves to a preset sampling location.

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