Particulate matter sampling and conveying device

Abstract

The utility model discloses a particulate matter sampling and conveying device which comprises an operation table, a filter membrane carrying mechanism, a membrane storage mechanism and a sampling mechanism, the filter membrane carrying mechanism, the membrane storage mechanism and the sampling mechanism are arranged on the operation table, a weighing and carrying mechanism is arranged on one side of the sampling mechanism, the membrane storage mechanism is used for storing filter membranes, and the filter membrane carrying mechanism is used for carrying the filter membranes on the membrane storage mechanism to the sampling mechanism. After the sampling mechanism completes sampling, the filter membrane carrying mechanism moves the filter membrane to the weighing carrying mechanism, and the weighing carrying mechanism is used for carrying the filter membrane to the electronic balance. A filter membrane on the membrane storage mechanism is moved to the sampling mechanism through the filter membrane carrying mechanism to be sampled, the sampled filter membrane is transferred to an electronic balance through the weighing carrying mechanism to be weighed, and a transfer support is arranged between the sampling mechanism and the weighing carrying mechanism to temporarily place the sampled filter membrane. The whole sampling and weighing process does not need manual intervention, the stability is high, the error rate is small, and the problem that errors are likely to occur when the PM2.5 concentration value is manually measured at present is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of air sampling equipment, in particular to a particle sampling and conveying device. Background Art

[0002] Current PM 2.5 The mass concentration is generally measured by gravimetric method, which generally collects PM through the sampler filter membrane. 2.5 The collected filter membrane is then placed in a constant temperature and humidity chamber for balance and weighing, and finally the PM 2.5 Concentration value.

[0003] Currently, the sampling process uses manual sampling, moving and weighing. Factors such as manual membrane replacement, bumpy transportation, and manual weighing can easily lead to errors in sampling and weighing. In addition, this work is repetitive and requires long hours, which increases the chance of error for experimenters. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a particle sampling and transmission device to solve the current manual PM 2.5 Concentration value measurement is prone to errors.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A particle sampling and conveying device comprises an operating table and a filter membrane transport mechanism arranged on the operating table, a membrane storage mechanism and a sampling mechanism are arranged in sequence in front of the filter membrane transport mechanism along its length direction, a weighing and transport mechanism is arranged on one side of the sampling mechanism, the membrane storage mechanism is used to store filter membranes, the filter membrane transport mechanism is used to transport the filter membranes on the membrane storage mechanism to the sampling mechanism, after the sampling mechanism completes sampling, the filter membrane transport mechanism moves the filter membrane to the weighing and transport mechanism, and the weighing and transport mechanism is used to transport the filter membrane to an electronic balance.

[0007] Furthermore, the filter membrane transport mechanism includes a first electric slide arranged horizontally, a second electric slide arranged crosswise on the first electric slide, and a clamping seat arranged on the second electric slide. The clamping seat includes a positioning frame, a first stepper motor arranged on the positioning frame, and two clamping jaws relatively arranged in the positioning frame. The first stepper motor is transmission-connected to the two clamping jaws, and the first stepper motor is used to drive the two clamping jaws to move relative to each other.

[0008] Furthermore, the film storage mechanism includes a first film storage tube arranged on the operating table, a first bracket arranged on one side of the first film storage tube and a sensor arranged above the first bracket. The sensor is located on one side above the tube opening of the first film storage tube, and the bottom end of the first film storage tube is connected to a first air pipe.

[0009] Furthermore, the sampling mechanism includes a first fixed seat vertically arranged on the operating table, a second stepper motor is arranged on the side of the first fixed seat away from the filter membrane transporting mechanism, a fixed table, a membrane clamping assembly and a sampling table are arranged in sequence from bottom to top on the side of the first fixed seat close to the filter membrane transporting mechanism, the membrane clamping assembly includes an air duct vertically penetrating the fixed table and a rack arranged on one side of the air duct, limit plates are arranged on both sides of the air duct on the fixed table, limit sleeves for limiting the air duct are arranged on opposite sides of the two limit plates, a gap matched with the rack is arranged between the two limit sleeves, a conical tray is arranged on the upper end of the air duct, the second stepper motor is connected to the rack for transmission, and a through hole coaxial with the conical tray is arranged on the sampling table.

[0010] Furthermore, the weighing and handling mechanism includes a second fixed seat vertically arranged at the bottom end of the operating table, a third electric slide vertically arranged on the second fixed seat, and a steering assembly arranged on the third electric slide. The steering assembly includes a base plate arranged on the third electric slide, a servo motor arranged on the base plate, a rotating shaft transmission-connected to the servo motor, and a filter membrane receiving plate arranged at the upper end of the rotating shaft. The rotating shaft is rotatably connected to the base plate, the rotating shaft is parallel to the second fixed seat, and the upper end of the rotating shaft passes through the operating table and is rotatably connected to the operating table.

[0011] Furthermore, a recovery mechanism is arranged on the side of the film storage mechanism away from the sampling mechanism, and the recovery mechanism includes a second bracket, a second film storage tube arranged on one side of the second bracket, and a film pressing assembly arranged on the second bracket, and the film pressing assembly includes a fourth electric slide and a pressing plate arranged on the fourth electric slide, the pressing plate is adapted to the tube mouth of the second film storage tube, and a second air pipe is arranged at the bottom end of the second film storage tube.

[0012] Furthermore, a transfer bracket is arranged between the first electric slide and the first fixed seat, an Ω-shaped adapter plate is horizontally arranged on the transfer bracket, and the filter membrane receiving plate is C-shaped and the outer diameter is smaller than the inner diameter of the adapter plate.

[0013] The significant beneficial effects achieved by the utility model are:

[0014] In the present application, the filter membrane on the membrane storage mechanism is moved to the sampling mechanism for sampling through the weighing and transporting mechanism, and the weighing and transporting mechanism is used to transfer the sampled filter membrane to the electronic balance for weighing. A transfer bracket is provided between the sampling mechanism and the weighing and transporting mechanism to temporarily place the sampled filter membrane. The coordination between the filter membrane transporting mechanism and the weighing and transporting mechanism is improved by the provision of the transfer bracket, thereby further improving the measurement efficiency. The entire sampling and weighing process does not require manual intervention, has high stability, and has a small error rate, which effectively solves the current manual PM 2.5 Concentration value measurement is prone to errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Attached Figure 2 This is a schematic diagram of the three-dimensional structure of the filter membrane transport mechanism of the utility model;

[0017] Attached Figure 3 It is a schematic diagram of the three-dimensional structure of the sampling mechanism in the utility model;

[0018] Attached Figure 4 It is a schematic diagram of the three-dimensional structure of the weighing and transporting mechanism in the utility model;

[0019] Attached Figure 5 This is a schematic diagram of the three-dimensional structure of the film storage mechanism in the utility model;

[0020] Attached Figure 6 This is a schematic diagram of the exploded three-dimensional structure of the film storage mechanism in the utility model;

[0021] Attached Figure 7 It is a schematic diagram of the three-dimensional structure of the recovery mechanism in the utility model;

[0022] Attached Figure 8 It is a schematic diagram of the top view of the air guide tube in the utility model.

[0023] In the attached drawings, 1, operating table; 2, filter membrane transport mechanism; 3, membrane storage mechanism; 4, sampling mechanism; 5, first electric slide; 6, second electric slide; 7, positioning frame; 8, first stepper motor; 9, clamping claw; 10, first membrane storage tube; 11, first bracket; 12, sensor; 13, first air pipe; 14, first fixed seat; 15, second stepper motor; 16, fixed table; 17, air guide tube; 18, rack; 19, sampling table; 20, first Second fixed seat; 21. third electric slide; 22. bottom plate; 23. servo motor; 24. rotating shaft; 25. filter membrane receiving plate; 26. encoder; 27. second bracket; 28. second film storage tube; 29. ​​fourth electric slide; 30. pressing plate; 31. second air pipe; 32. transfer bracket; 33. adapter plate; 34. fixing hoop; 35. lifting plate; 36. recovery mechanism; 37. weighing and handling mechanism; 38. conical tray; 39. limiting sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Example 1

[0026] like Figure 1-Figure 6 and Figure 8 As shown, a particle sampling and conveying device comprises an operating table 1, on which a filter membrane conveying mechanism 2 is horizontally mounted, in front of which a membrane storage mechanism 3 and a sampling mechanism 4 are sequentially mounted along the length direction thereof, and a weighing and conveying mechanism 37 is mounted on one side of the sampling mechanism 4;

[0027] Among them, the membrane storage mechanism 3 is used to store the filter membrane, the filter membrane transporting mechanism 2 is used to transport the filter membrane on the membrane storage mechanism 3 to the sampling mechanism 4, and the sampling mechanism 4 takes samples after the filter membrane arrives at the sampling mechanism 4. After the sampling mechanism 4 takes samples, the filter membrane transporting mechanism 2 moves the filter membrane to the weighing transporting mechanism 37, and the weighing transporting mechanism 37 is used to transport the filter membrane to the electronic balance for weighing. In this embodiment, the electronic balance is an electronic balance placed on the operating table 1, and the position of the electronic balance can be placed according to the activity range of the weighing transporting mechanism 37.

[0028] Specifically, the filter membrane transport mechanism 2 includes a first electric slide 5 horizontally installed on the operating table 1, a second electric slide 6 installed on the first electric slide 5 crosswise with the first electric slide 5, and a clamping seat installed on the second electric slide 6. The first electric slide 5 is used to drive the second electric slide 6 to move left and right, and the second electric slide 6 is used to drive the clamping seat to move forward and backward. The clamping seat includes a positioning frame 7 installed on the second electric slide 6, a first stepper motor 8 installed on the upper end of the positioning frame 7, and two clamping jaws 9 relatively installed in the positioning frame 7. The first stepper motor 8 is transmission-connected with the two clamping jaws 9, and the first stepper motor 8 is used to drive the two clamping jaws 9 to move relative to each other; the output shaft of the first stepper motor 8 extends into the positioning frame 7 and is installed with a gear, and the two clamping jaws 9 are both installed with a rack 18 parallel to the first electric slide 5, the gear is located between the two racks 18 and is respectively meshed with the two racks 18, and the operation of the first stepper motor 8 drives the two clamping jaws 9 to move relative to each other to clamp the filter membrane;

[0029] The film storage mechanism 3 includes a first film storage tube 10 installed on the first operating table 1, a first bracket 11 installed on one side of the first film storage tube 10, and a sensor 12 installed above the first bracket 11. The sensor 12 is located on one side above the tube mouth of the first film storage tube 10. The bottom end of the first film storage tube 10 is connected to a first air pipe 13, and the first air pipe 13 is connected to an air source. The first film storage tube 10 is used to stack and store filter membranes. The sensor 12 is used to sense whether there is a filter membrane protruding from the tube mouth of the first film storage tube 10. The filter membrane transport mechanism 2 determines whether to transport it through the sensor 12. The first air pipe 13 is used to communicate with the air source, and the stacked filter membranes are pushed upward by blowing air through the first air pipe 13.

[0030] The sampling mechanism 4 includes a first fixed seat 14 vertically mounted on the operating table 1, a second stepping motor 15 is installed on the side of the first fixed seat 14 away from the first electric slide 5, a fixed table 16, a film clamping assembly and a sampling table 19 are installed in sequence from bottom to top on the side of the first fixed seat 14 close to the first electric slide 5, the film clamping assembly includes an air guide tube 17 vertically penetrating the fixed table 16 and a rack 18 installed on one side of the air guide tube 17, and the fixed table 16 is installed with limit plates located on both sides of the air guide tube 17, and the two limit plates are installed on opposite sides with limit sleeves 39 for limiting the air guide tube 17, and the limit sleeves 39 are arc-shaped, and there is a gap between the two limit sleeves 39. A gap matching the rack 18 is left, a conical tray 38 is installed on the upper end of the air guide tube 17, the second stepper motor 15 is connected to the rack 18, and the air guide tube 17 is driven to move up and down by the operation of the second stepper motor 15. A through hole matching the conical tray 38 is opened on the sampling platform 19, and the air guide tube 17 is connected to the air pump; after the filter membrane transport mechanism 2 moves the filter membrane to the conical tray 38, the second stepper motor 15 drives the air guide tube 17 to move upward, so that the distance between the conical tray 38 and the sampling platform 19 is shortened to clamp the filter membrane, and the air is pumped through the air pump connected to the air guide tube 17 to make the air pass through the filter membrane to complete the sampling;

[0031] The weighing and transporting mechanism 37 includes a second fixed seat 20 vertically mounted at the bottom end of the operating table 1, a third electric slide 21 vertically mounted on the second fixed seat 20, and a steering assembly mounted on the third electric slide 21. The rotating assembly includes a bottom plate 22 mounted on the third electric slide 21, a servo motor 23 mounted on the bottom plate 22, a rotating shaft 24 drivingly connected to the servo motor 23, and a filter membrane receiving plate 25 mounted on the upper end of the rotating shaft 24. The rotating shaft 24 is rotatably connected to the bottom plate 22. The length direction of the rotating shaft 24 is parallel to the length direction of the second fixed seat 20. The upper end of the rotating shaft 24 passes through the operating table 1 and is rotatably connected to the operating table 1. The filter membrane receiving plate 25 is located above the operating table 1. After the filter membrane is sampled on the sampling mechanism 4, the filter membrane transporting mechanism 2 moves the filter membrane to the filter membrane receiving plate 25. The filter membrane receiving plate 25 transfers and weighs the filter membrane by moving up and down and rotating the rotating shaft 24.

[0032] In order to monitor the rotation angle of the rotating shaft 24 and lower the filter membrane after it rotates to the right position, an encoder 26 is installed on the bottom plate 22. The encoder 26 is connected to the rotating shaft 24 to monitor the rotation angle of the rotating shaft 24 and ensure that it drives the filter membrane to move to the electronic balance for weighing.

[0033] In combination with the above, the present application stores multiple filter membranes through the membrane storage mechanism 3, and the filter membrane transport mechanism 2 transfers the filter membrane to the sampling mechanism 4 for sampling. After the sampling of the sampling mechanism 4 is completed, the filter membrane transport mechanism 2 transfers the filter membrane to the weighing transport mechanism 37, and the weighing transport mechanism 37 transfers the filter membrane to the electronic balance for weighing. The entire sampling and weighing process does not require manual intervention, has high stability, and a small error rate, which effectively solves the current manual PM 2.5 Concentration value measurement is prone to errors.

[0034] Example 2

[0035] like Figure 1 and Figure 7 As shown, the structure of this embodiment is substantially the same as that of embodiment 1, and this embodiment is further optimized on the basis of embodiment 1. In this embodiment, in order to facilitate continuous weighing of the filter membrane, a recovery mechanism 36 is installed on the side of the film storage mechanism 3 away from the sampling mechanism 4, and the recovery mechanism 36 includes a second bracket 27, a second film storage tube 28 installed on one side of the second bracket 27, and a film pressing assembly installed on the second bracket 27, and the film pressing assembly includes a fourth electric slide 29 and a pressing plate 30 installed on the fourth electric slide 29, and the pressing plate 30 is adapted to the tube mouth of the second film storage tube 28, and the bottom end of the second film storage tube 28 is connected to a second air pipe 31;

[0036] The recovery mechanism 36 , the touch mechanism and the sampling mechanism 4 are sequentially installed on the operating table 1 .

[0037] Specifically, the first film storage tube 10 and the second film storage tube 28 are both slidably connected with a horizontally placed lifting plate 35, and the filter membrane is raised and lowered by lifting and lowering the lifting plate 35. The first air pipe 13 and the second air pipe 31 are both connected to the air source through the solenoid valve; the first air pipe 13 continuously pumps air to lift the lifting plate 35 and continuously raise the filter membrane; the second air pipe 31 continuously releases air to continuously lower the lifting plate 35 and store the weighed filter membrane;

[0038] Workflow: After the filter membrane is weighed, the filter membrane is transferred to the filter membrane transport mechanism 2 through the weighing and transporting mechanism 37. The filter membrane transporting mechanism 2 puts the weighed filter membrane into the second membrane storage tube 28 and presses it down through the fourth electric slide 29 to place the filter membranes tightly together and avoid wasting space.

[0039] Example 3

[0040] like Figure 1As shown, the structure of this embodiment is substantially the same as that of embodiment 2. This embodiment is further optimized on the basis of embodiment 2. In order to further improve the detection efficiency, a transport bracket 32 ​​is installed on one side between the first electric slide 5 and the first fixed seat 14. An Ω-shaped adapter plate 33 is horizontally installed on the transport bracket 32. The filter membrane receiving plate 25 is C-shaped and its outer diameter is smaller than the inner diameter of the adapter plate 33.

[0041] The sampled filter membrane is temporarily placed by setting the transport bracket 32, the filter membrane transport mechanism 2 moves the next filter membrane to the sampling mechanism 4, and at the same time, the weighing transport mechanism 37 transfers the sampled filter membrane to the weighing place for weighing. After the filter membrane is weighed, the weighing transport mechanism 37 puts the filter membrane back to the transport bracket 32, and the filter membrane transport mechanism 2 puts the weighed filter membrane back to the recovery mechanism 36. At this time, the next filter membrane sampling is completed, and the filter membrane transport mechanism 2 puts the sampled filter membrane back on the transport bracket 32 ​​to wait for weighing. Repeat the above operation, the filter membrane sampling and weighing can be fully mechanized, with strong stability, high efficiency and low error rate;

[0042] The shape of the filter membrane receiving plate 25 and the adapter plate 33 can facilitate the weighing and transporting mechanism 37 to quickly remove and put back the filter membrane from the adapter plate 33 .

[0043] It should be noted that the first bracket 11 and the second bracket 27 are both equipped with fixing hoops 34 to clamp and fix the first film storage tube 10 and the second film storage tube 28. The setting of the fixing hoop 34 can facilitate the installation and removal of the first film storage tube 10 and the second film storage tube 28; in the present application, the sensor is a laser sensor; as a conventional technical means for personnel in this field, the controller is respectively connected to the filter membrane transport mechanism, the sampling mechanism, the film storage mechanism, the weighing and transport mechanism and the recovery mechanism, so that automatic control can be achieved. After the test starts, there is no need for excessive manual intervention, and it is only necessary to check at key nodes, which also falls within the scope of protection of the present application.

[0044] In combination with the above three embodiments, the working principle of the present application is as follows: the staff first places a plurality of filter membranes in a stacked manner in the first film storage tube 10, so that the lifting plate 35 in the second film storage tube 28 rises to the tube mouth, and the first film storage tube 10 is inflated to lift the filter membrane out of the first film storage tube 10. After the sensor 12 senses that the filter membrane has been lifted, the first electric slide 5 drives the second slide to move to a position opposite to the first film storage tube 10, and the second electric slide 6 drives the positioning frame 7 to move toward the first film storage tube 10, so that the two clamps 9 move to both sides of the filter membrane. The first stepper motor 8 works to close the two clamps 9 to clamp the filter membrane, and the second electric slide 6 drives the positioning frame 7 to return to its original position. The first electric slide 5 drives the second electric slide 6 to move to the sampling mechanism 4, and the second electric slide 6 drives the positioning frame 7 to move toward the sampling mechanism 4 so that the filter membrane is located above the conical tray 38. The first stepper motor 8 drives the two clamps 9 to separate, and the filter membrane automatically falls on the conical tray 38. On the top, the second stepper motor 15 works to drive the air guide tube 17 to rise, so that the conical tray 38 and the sampling platform 19 sandwich the filter membrane in the middle, and the air guide tube 17 is evacuated to allow air to pass through the filter membrane to complete sampling; after the sampling is completed, the filter membrane conveying mechanism 2 transfers the filter membrane to the transfer bracket 32, and the weighing conveying mechanism 37 transfers the filter membrane to the electronic balance for weighing. At the same time, the filter membrane conveying mechanism 2 re-transfers the filter membrane on the first film storage tube 10 to the sampling mechanism 4 for sampling. At this time, the filter membrane is weighed, and the weighing conveying mechanism 37 re-places the filter membrane on the transfer bracket 32. After the filter membrane conveying mechanism 2 places the filter membrane on the sampling mechanism 4, the filter membrane conveying mechanism 2 transports the weighed filter membrane to the mouth of the second film storage tube 28, and the fourth electric slide 29 drives the pressing plate 30 to press the filter membrane into the second film storage tube 28. The second film storage tube 28 gradually deflates when the filter membrane enters, and the above operations are repeated to complete the sampling and weighing work.

[0045] To summarize, in the present application, the filter membrane on the membrane storage mechanism 3 is moved to the sampling mechanism 4 for sampling through the weighing and transporting mechanism 37, and the weighing and transporting mechanism 37 transfers the sampled filter membrane to the electronic balance for weighing. A transfer bracket 32 ​​is provided between the sampling mechanism 4 and the weighing and transporting mechanism 37 to temporarily place the sampled filter membrane. The setting of the transfer bracket 32 ​​improves the coordination between the filter membrane transporting mechanism 2 and the weighing and transporting mechanism 37, thereby further improving the measurement efficiency. The entire sampling and weighing process does not require manual intervention, has high stability, and a low error rate, which effectively solves the problem of errors that are prone to occur in the current manual measurement of PM2.5 concentration values.

[0046] At present, the technical solution of this application has been put into pilot production, that is, a small-scale experiment before the large-scale mass production of the product; after the pilot production was completed, a user usage survey was carried out in a small range, and the survey results showed that user satisfaction was high; now we have begun to prepare for the formal production of the product for industrialization (including intellectual property risk warning survey).

Claims

1. A particle sampling and conveying device, characterized in that: The invention comprises an operating table (1), and a filter membrane transport mechanism (2) arranged on the operating table (1); a membrane storage mechanism (3) and a sampling mechanism (4) are arranged in sequence in front of the filter membrane transport mechanism (2) along its length direction; a weighing transport mechanism (37) is arranged on one side of the sampling mechanism (4); the membrane storage mechanism (3) is used to store filter membranes; the filter membrane transport mechanism (2) is used to transport the filter membranes on the membrane storage mechanism (3) to the sampling mechanism (4); after the sampling mechanism (4) completes sampling, the filter membrane transport mechanism (2) moves the filter membrane to the weighing transport mechanism (37); and the weighing transport mechanism (37) is used to transport the filter membrane to an electronic balance.

2. A particle sampling and conveying device according to claim 1, characterized in that: The filter membrane transport mechanism (2) comprises a first electric slide (5) arranged horizontally, a second electric slide (6) arranged crosswise on the first electric slide (5), and a clamping seat arranged on the second electric slide (6), the clamping seat comprises a positioning frame (7), a first stepper motor (8) arranged on the positioning frame (7), and two clamping jaws (9) arranged relatively in the positioning frame (7), the first stepper motor (8) is transmission-connected with the two clamping jaws (9), and the first stepper motor (8) is used to drive the two clamping jaws (9) to move relative to each other.

3. A particle sampling and conveying device according to claim 2, characterized in that: The film storage mechanism (3) comprises a first film storage tube (10) arranged on the operating table (1), a first bracket (11) arranged on one side of the first film storage tube (10), and a sensor (12) arranged above the first bracket (11); the sensor (12) is located on one side above the tube opening of the first film storage tube (10); and the bottom end of the first film storage tube (10) is connected to a first air pipe (13).

4. A particle sampling and conveying device according to claim 3, characterized in that: The sampling mechanism (4) comprises a first fixed seat (14) vertically arranged on the operating table (1); a second stepping motor (15) is arranged on a side of the first fixed seat (14) away from the filter membrane transport mechanism (2); a fixed platform (16), a film clamping assembly and a sampling table (19) are arranged in sequence from bottom to top on a side of the first fixed seat (14) close to the filter membrane transport mechanism (2); the film clamping assembly comprises an air guide tube (17) vertically penetrating the fixed platform (16) and a rack (19) arranged on one side of the air guide tube (17). 8), the fixed platform (16) is provided with limit plates located on both sides of the air guide tube (17), and the two limit plates are provided with limit sleeves (39) for limiting the air guide tube (17) on opposite sides, and a gap matched with the rack (18) is provided between the two limit sleeves (39), and a conical tray (38) is provided at the upper end of the air guide tube (17), the second stepping motor (15) is connected to the rack (18) in driving manner, and the sampling platform (19) is provided with a through hole coaxial with the conical tray (38).

5. A particle sampling and conveying device according to claim 4, characterized in that: The weighing and handling mechanism (37) comprises a second fixed seat (20) vertically arranged at the bottom end of the operating table (1), a third electric slide (21) vertically arranged on the second fixed seat (20), and a steering assembly arranged on the third electric slide (21); the steering assembly comprises a base plate (22) arranged on the third electric slide (21), a servo motor (23) arranged on the base plate (22), a rotating shaft (24) drivingly connected to the servo motor (23), and a filter membrane receiving plate (25) arranged at the upper end of the rotating shaft (24); the rotating shaft (24) is rotatably connected to the base plate (22); the rotating shaft (24) is parallel to the second fixed seat (20); and the upper end of the rotating shaft (24) passes through the operating table (1) and is rotatably connected to the operating table (1).

6. A particle sampling and conveying device according to claim 5, characterized in that: A recovery mechanism (36) is arranged on the side of the film storage mechanism (3) away from the sampling mechanism (4), and the recovery mechanism (36) includes a second bracket (27), a second film storage tube (28) arranged on one side of the second bracket (27), and a film pressing assembly arranged on the second bracket (27), and the film pressing assembly includes a fourth electric slide (29) and a pressing plate (30) arranged on the fourth electric slide (29), and the pressing plate (30) is adapted to the tube mouth of the second film storage tube (28), and a second air pipe (31) is arranged at the bottom end of the second film storage tube (28).

7. A particle sampling and conveying device according to claim 6, characterized in that: A transfer bracket (32) is arranged between the first electric slide (5) and the first fixed seat (14), an Ω-shaped adapter plate (33) is horizontally arranged on the transfer bracket (32), and the filter membrane receiving plate (25) is C-shaped and has an outer diameter smaller than the inner diameter of the adapter plate (33).

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