Automatic sampling equipment for fine particle detection samples

Abstract

The present invention relates to the field of automatic stamping sampling, and in particular to an automatic sampling device for fine particle detection samples. It includes a structural frame, side panels arranged on the surface, and also includes: a sampling component, which is fixedly connected to the structural frame and is used to shift the detection sample to the stamping area and collect random samples formed by stamping; a pressing component, which is arranged above the sampling component and is used to position the detection sample before stamping; a stamping component, which is arranged above the pressing component and is used to perform stamping sampling on the detection sample; a digestion solution distribution device, which is used to control the delivery of the digestion solution in the equipment. The purpose of this technical solution is to achieve automatic sampling and improve sampling efficiency; automatically inject the digestion solution to avoid danger when volatile substances come into direct contact with the human body.

Description

Technical Field

[0001] The invention relates to the field of automatic punching sampling, and in particular to an automatic sampling device for fine particle detection samples. Background Art

[0002] Fine particulate matter is also called fine particles, fine particles, and PM2.5. Fine particulate matter refers to particles in the ambient air with an aerodynamic equivalent diameter of less than or equal to 2.5 microns. It can be suspended in the air for a long time. The higher the concentration in the air, the more serious the air pollution. Although PM2.5 is only a small component in the earth's atmosphere, it has an important impact on air quality and visibility.

[0003] In the prior art, the fine particulate matter detection samples are manually cut and sampled, and manually placed in a reaction container, and a certain amount of digestion solution is placed for digestion, and the components of the digested solution are tested. First, the detection samples need to be manually cut and sampled, and the sampling is required to reach a fixed percentage of the area sample, so manual sampling is difficult and inefficient; second, when the digestion solution is volatile, manual operation is dangerous, and the amount added is not easy to control; third, the sample is easily contaminated when manually cutting and sampling. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned technologies, the present invention proposes an automatic sampling device for fine particle detection samples, which aims to realize automatic sampling, improve sampling efficiency, and prevent sample contamination; and automatically inject digestion solution to avoid danger when volatile substances come into direct contact with the human body.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An automatic sampling device for fine particle detection samples, comprising a structural frame, a side plate arranged on a surface, and further comprising:

[0007] A sampling assembly, which is fixedly connected to the structural frame and is used to shift the test sample to the stamping area and to collect random samples formed by stamping;

[0008] A pressing component, which is arranged above the sampling component and is used to position the test sample before stamping;

[0009] A stamping assembly, which is arranged above the pressing assembly and is used for stamping and sampling the test sample;

[0010] A digestion solution distribution device, used to control the delivery of the digestion solution in the equipment;

[0011] Lifting platform assembly, used to realize storage, retrieval and loading operations of reaction bottles;

[0012] The piping system is used to assist in the transportation of the digestion solution and the random samples formed by punching.

[0013] It is further defined that the sampling assembly includes a carrier, a slide, a connecting rod, a slider, a guide rod and a second motor; wherein:

[0014] A bearing platform is fixedly connected to the structural frame, a slide rail is provided on the upper surface of the bearing platform, a central leakage hole is provided on the bearing platform (31), and the central leakage hole is connected to the pipeline system through a pipeline;

[0015] A slide table is slidably connected to the slide rail of the bearing platform, and a punching through hole matching the punching assembly is provided on the upper surface of the slide table;

[0016] A connecting rod is fixedly connected to the rear of the slide, and the other end of the connecting rod is slidably connected to the guide rod through a slider;

[0017] The second motor is fixedly connected to the structural frame, and the central rotating shaft thereof is fixedly connected to one end of the guide rod.

[0018] It is further defined that the pressing assembly includes: a pressing portion, a sleeve portion, a mounting block, a rotating shaft, a bevel gear set, a third motor, a turbine and a worm; wherein:

[0019] A pressing part is formed integrally with the sleeve part, and a punching through hole corresponding to the punching assembly is provided on the pressing part;

[0020] The sleeve part is fixedly installed at the center of the rotating shaft;

[0021] The rotating shaft is positioned on the frame through a mounting block;

[0022] A bevel gear set is fixedly connected to the end of the rotating shaft, and multiple rotating shafts are transmitted through the bevel gear set in a closed loop;

[0023] The third motor is connected to the turbine connected to the rotating shaft through a worm gear, thereby providing a power source for the rotating shaft.

[0024] It is further defined that the stamping assembly includes a stamping cylinder, a positioning plate, a stamping head, a connecting portion and a limiting assembly; wherein:

[0025] The punching cylinder is fixedly connected to the positioning plate below;

[0026] A positioning plate, with a limiting guide rail on the bottom surface;

[0027] The punching head is fixedly connected to the lower end of the central axis of the punching cylinder through a connecting portion, and a plurality of hollow punching tubes are arranged below the punching head;

[0028] The limiting assembly is fixedly connected to the punching head and is used to limit the free rotation of the central rotating shaft of the punching cylinder.

[0029] It is further defined that the digestion solution dispensing device includes a placement table, a storage container and a residual quantity detector; wherein

[0030] A placing table, fixedly connected to the structural frame;

[0031] The storage container is placed on the placement table and is provided with an air inlet for air to enter the interior of the storage container;

[0032] The residual detector is fixedly connected to the placement table and is used to detect the residual amount of the digestion solution in the storage container.

[0033] It is further defined that the lifting platform assembly includes a first mounting plate, a second mounting plate, a light rod positioning block, a fourth motor, a lead screw, a lead screw nut, a lifting plate and a guide light rod; wherein:

[0034] The first mounting plate and the second mounting plate are fixedly connected to the structural frame, the first mounting plate is provided with a bearing seat fixedly connected thereto, and the upper and lower ends of the second mounting plate are fixedly connected to polished rod positioning blocks;

[0035] a fourth motor, fixedly connected to the first mounting plate;

[0036] A screw rod is fixedly connected to the central rotating shaft of the fourth motor through a coupling, and the screw rod nut is arranged on the screw rod;

[0037] A lifting plate is fixedly connected to the screw nut;

[0038] The guide light rod is slidably connected to one side of the lifting plate.

[0039] It is further defined that the pipeline system includes a reaction bottle, a bottle stopper, a first pipeline and a second pipeline; wherein:

[0040] A bottle stopper is positioned above the reaction bottle, and a negative pressure tube is fixedly provided on the bottle stopper;

[0041] A first pipeline, one end of which passes through the bottle stopper and is connected to the interior of the reaction bottle, and the other end of which is connected to the storage container in the digestion solution distribution device, for conveying the digestion solution;

[0042] The second pipeline has one end passing through the bottle stopper to communicate with the interior of the reaction bottle, and the other end connected to the central leak hole on the supporting platform, and is used to transport random samples formed by stamping.

[0043] It is further defined that it also includes a light-sensing camera and a light-emitting unit; wherein:

[0044] Light-sensing cameras are fixed on both sides of the positioning plate to monitor the permeability of the stamping tube;

[0045] The light-emitting part is fixed in the working area of ​​the light-sensing camera and is used to assist the light-sensing camera in making judgments.

[0046] It is further defined that the punching tube disposed below the punching head has at least two length specifications.

[0047] Further restrictions include:

[0048] The exhaust fan is arranged on the side panel and is used to exhaust the volatile substances out of the equipment body.

[0049] The technical effects achieved by this technical solution are as follows:

[0050] The sampling component places the fine particle detection sample in the stamping area, the pressing component positions it, and the stamping component performs stamping sampling, thereby achieving the technical effect of automatic stamping sampling of the fine particle detection sample and improving the sampling efficiency. At the same time, the digestion solution distribution device is used to control the transportation of the digestion solution in the equipment, the lifting platform component is used to realize the storage, retrieval and loading operations of the reaction bottle, and the pipeline system is used to assist in the transportation of the digestion solution and the random samples formed by stamping. The digestion solution distribution device can quantitatively control the amount of digestion solution placed, and cooperates with the lifting platform component and the pipeline system to realize automatic control, freeing up manual operation, enhancing sample representativeness, improving safety, and reducing the chance of sample contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a front perspective view of the present invention;

[0052] Figure 2 It is a back stereoscopic view of the present invention;

[0053] Figure 3 This is an exploded view of the stamping part;

[0054] Figure 4 for Figure 2 A partial view in FIG.

[0055] Figure 5 A three-dimensional diagram of a first pressing component embodiment;

[0056] Figure 6 A three-dimensional diagram of an embodiment of a linear drive assembly;

[0057] Figure 7 is a three-dimensional diagram of a second pressing assembly embodiment;

[0058] Figure 8 This is a structural diagram of an embodiment of a limit assembly.

[0059] Figure Number

[0060] 1-structure frame, 2-side plate, 3-sampling component, 4-pressing component, 5-punching component, 6-digestion solution distribution component, 7-lifting platform component, 8-storage port, 9-sample collecting device, 10-first pipeline, 11-air inlet, 12-exhaust fan, 13-pressing component, 31-carrying platform, 32-sliding platform, 33-safety baffle, 34-protective plate, 35-linear drive component, 351-rack, 352-gear, 353-positioning plate, 354-first motor 36-center leak hole, 37-flange joint, 38-light-emitting part, 39-connecting rod, 310-sliding block, 311-guide rod, 312-second motor, 41-pressing part, 42-sleeve part, 43-mounting block, 44-rotating shaft, 45-bevel gear set, 46-third motor, 47-turbine, 48-worm, 51-stamping cylinder, 52-positioning plate, 53-stamping head, 54-connecting part, 55-limiting rod, 56-stamping tube, 57-limiting guide rail, 58-light-sensing camera, 61-placing table, 62-storage container, 63-remaining detector, 71-first mounting plate, 72-second mounting plate, 73-fourth motor, 74-bearing seat, 75-light rod positioning block, 76-screw, 77-guide light rod, 78-screw nut, 79-lifting plate, 710-reaction bottle, 711-bottle stopper, 712-negative pressure tube, 713-negative pressure head, 714-second pipeline, 81-storage and access area, 82-installation area, 131-spring, 132-top plate, 133-contact, 141-limiting part, 142-guide rod. DETAILED DESCRIPTION

[0061] The following is further described in detail through specific implementation methods:

[0062] like Figures 1 to 8 As shown, an automatic sampling device for fine particle detection samples provided by the present invention comprises a structural frame 1 and a side plate 2 arranged on the surface. A sampling assembly 3 is fixedly arranged in the middle of the structural frame 1. A pressing assembly 4 and a punching assembly 5 are arranged in sequence in the vertical direction upward of the sampling assembly 3. A digestion liquid dispensing device 6 is arranged on the left side of the sampling assembly 3, and a lifting platform assembly 7 is arranged on the right side.

[0063] Furthermore, the sampling assembly 3 includes a bearing platform 31 with a slide rail on its upper surface, a slidable slide 32 installed on its upper part, and a punching hole matched with the punching assembly 5 is provided on the upper surface of the slide 32. A connecting rod 39 is fixedly connected to the rear of the slide 32, and the other end of the connecting rod 39 is slidably connected to the guide rod 311 through a slider 310, and the slider can slide linearly along the direction of the guide rod 311. One end of the guide rod 311 is fixedly connected to the central shaft of the second motor 312.

[0064] Furthermore, the sampling assembly 3 also includes a central leak hole 36 disposed on the supporting platform 31 , and the central leak hole 36 is fixedly connected to the second pipeline 714 via a flange joint 37 .

[0065] When in use, the sample is placed on the circular placement area above the slide 32, and then the second motor 312 starts to work. The central shaft of the second motor 312 drives the guide rod 311 to rotate, so that the connecting rod 39 moves to the rear, thereby pulling the slide 32 to move to the rear.

[0066] Furthermore, in order to avoid danger to people during the stamping process, a protective plate 34 is provided above the sampling component 3, a safety baffle 33 is provided below the protective plate 34, and a linear drive component 35 that allows the safety baffle 33 to move up and down.

[0067] Figure 6 An embodiment of a linear drive assembly 35 is shown, including a rack 351 fixed to one side of a protective plate 34, wherein the rack 351 is meshed with a gear 352 fixedly connected to the central shaft of a first motor 354, and the motor 354 is connected to the safety baffle 33 via a positioning plate 353.

[0068] The linear drive assembly 35 may also be implemented by a screw-nut mechanism or a rocker-slider mechanism.

[0069] Figure 5 An embodiment of a pressing component 4 is shown, wherein the pressing component 4 includes a pressing portion 41, wherein the pressing portion 41 is integrally formed with a sleeve portion 42, and the pressing portion 41 is provided with a punching through hole corresponding to the punching component, and the sleeve portion 42 is fixedly mounted at the center position of a rotating shaft 44; further comprising a mounting block 43, wherein the mounting block 43 is used to position the rotating shaft 44 on a frame, and a bevel gear set 45 is mounted at the end of the rotating shaft 44, and multiple rotating shafts 44 are driven in a closed loop through the bevel gear set 45; a third motor 46 is driven in cooperation with a turbine 47 connected to the rotating shaft 44 through a worm 48, thereby providing a power source for the rotating shaft.

[0070] When the sample placement area above the slide 32 moves to the right below the pressing part 41, the pressing component 4 starts to work. The third motor 46 is started to drive the rotating shaft 44 to rotate through the worm gear transmission, thereby driving the pressing part 41 to rotate downward along the rotating shaft 44 to be parallel to the horizontal plane, thereby pressing the sample to be punched and sampled, to prevent the sample from being wrinkled or misaligned during punching.

[0071] Figure 7The second embodiment of the pressing assembly 4 is shown, and the pressing assembly 13 is equivalent to the pressing assembly 4. The pressing assembly 13 is fixedly arranged at the lower edge of the punch head 53, and includes a spring 131, the upper end of the spring 131 contacts the lower surface of the punch head 53, and the lower end contacts the top plate 132, and the top plate 132 is fixedly connected to the contact 133 through a support rod connected thereunder. When the spring 131 is fully released, the vertical height of the contact 133 should be lower than the lowest point of the punch tube 56, so as to ensure that the contact 133 contacts the sample before the punch tube 56.

[0072] When the punch head 53 moves downward, the contact 133 first contacts the sample, and the sample is pressed and positioned. When the punch head 53 continues to move downward, the spring 131 is compressed, and the contact 133 moves upward. When its vertical height is higher than the bottom of the punch tube 56, the punch tube contacts the sample and the punching operation is realized.

[0073] Figure 3 , an embodiment of the punching assembly 5 is shown, the punching assembly 5 comprises a punching cylinder 51, which is fixedly connected to a positioning plate 52 below, and a limiting guide rail 57 is provided on the bottom surface of the positioning plate 52. The lower end of the central axis of the punching cylinder 51 is fixedly connected to a punching head 53 through a connecting portion 54, and a plurality of hollow punching tubes 56 are provided below the punching head 53.

[0074] Furthermore, since the central axis of the punching cylinder 51 can rotate freely, the punching tube 56 and the punching through hole of the pressing portion 41 arranged below are easily misaligned, and the punching operation cannot be completed. In order to solve the above problem, a limit assembly is provided on the punching head 53.

[0075] A first embodiment of the limiting assembly is that a limiting rod 55 is rotatably connected to a side of the connecting portion 54 , and the other end of the limiting rod 55 is slidably connected to a limiting guide rail 57 via a slider.

[0076] When the pressing part 41 has rotated to the horizontal position, the stamping assembly starts to work. The stamping cylinder 51 extends the central axis, thereby driving the stamping head 53 to move downward, so that the stamping tube 56 passes through the stamping hole on the pressing part 41 and stamps the sample. The random sample formed by the stamping sample will slide through the stamping hole on the slide 32 to the central leak hole 36 below. The central leak hole 36 is fixedly connected to the second pipeline 714 through the flange joint 37.

[0077] Figure 8The second embodiment of the limit assembly is shown, which includes a limit portion 141 fixedly connected to the side of the punch head 53, a through hole is provided in the middle of the limit portion, and a guide rod 142 is slidably connected in the through hole. When the punch head 53 moves downward, under the action of the guide rod, the punch head can only move up and down, achieving the technical effect of limiting its circumferential free rotation.

[0078] Furthermore, the random sample formed by the punching tube 56 may sometimes get stuck under the punching tube 56, which may affect the next punching work. In order to observe the occurrence of the above situation, light-sensing cameras 58 are provided on both sides of the positioning plate 52, and a light-emitting portion 38 is provided on the side of the central leak hole 56. After the punching work is completed, the light-emitting portion 38 emits light continuously, and the light generated by it is observed by the light-sensing camera 58 through the central hole of the punching tube 56. If the random sample formed by the punching tube 56 is stuck, the light intensity passing through the central hole of the punching tube will be reduced, and thus be detected by the camera.

[0079] Furthermore, when the punching tube 56 starts to contact the sample, the larger the contact area, the greater the obstruction of the sample to the punching tube 56. In order to reduce the reaction force generated by the sample on the punching tube 56, it is preferred to set the punching tube 56 set on the punching head 53 to have at least two length specifications, and specifically, the length of half of the punching tubes can be set to be slightly lower than the other half. When the punching head 53 drives the punching tube 56 to move downward, the longer punching tube 56 first contacts the sample and performs punching. After the punching is completed, the punching head 53 continues to move downward, so that the shorter punching tube 56 contacts the sample again and performs punching, thereby achieving the technical effect of reducing the reaction force generated by the sample on the punching tube 56.

[0080] Furthermore, the digestion solution dispensing device 6 includes a storage container 62 placed on a placing table 61, a remaining quantity detector 63 fixed on the placing table 61, and an air inlet 11, wherein the air inlet 11 is connected to the storage container 62 through an air pipe; and also includes a first pipe 10 for conveying the digestion solution, wherein the first pipe 10 is connected to the bottom of the storage container 62.

[0081] When the digestion solution needs to be distributed, the storage container 62 is pressurized from the air inlet 11 , so that the digestion solution is pressed into the reaction bottle 710 through the first pipe 10 under the action of high air pressure.

[0082] Furthermore, the residual detector 63 can be a photoelectric sensor. When the digestion solution is non-transparent, when the liquid level of the digestion solution drops from high to lower than the residual detector 63, it generates a jump signal to warn that the residual amount of the digestion solution is insufficient and the digestion solution is injected in time.

[0083] Furthermore, the digestion solution may be aqua regia.

[0084] Furthermore, the lifting platform assembly 7 includes a first mounting plate 71 and a second mounting plate 72 fixedly connected to the structural frame 1; and also includes a fourth motor 73 and a bearing seat 74 fixedly mounted on the first mounting plate 71, and the central rotating shaft of the fourth motor 73 is fixedly connected to a screw rod 76 through a coupling. A screw nut 78 is rotatably connected to the screw rod 76, and the screw nut 78 is fixedly connected to a lifting plate 79. The upper and lower ends of the second mounting plate 72 are fixedly connected to light rod positioning blocks 75 for positioning a guide light rod 77, and the guide light rod 77 is slidably connected to one side of the lifting plate 79 to improve the movement stability of the lifting plate 79.

[0085] A bottle stopper 711 is provided above the reaction bottle 71, which is not fixedly connected to the reaction bottle 710, but can be used for temporary cover when the digestion solution is injected, so as to prevent the volatilization of the digestion solution. A negative pressure tube 712, a first pipeline 10, and a second pipeline 714 are fixedly provided on the bottle cap 711. A negative pressure head 713 is provided at the other end of the negative pressure tube 712; the first pipeline 10 is used to transport the digestion solution; and the second pipeline 714 is used to transport the random samples formed by stamping.

[0086] When starting work, the lifting plate 79 is at the access area 81, and the reaction bottle needs to be manually placed from the access port 8. Afterwards, the fourth motor is started to drive the screw rod to rotate, thereby driving the lifting plate 79 to move upward, and when the lifting plate 79 reaches the loading area 82, the fourth motor stops rotating. At this time, negative pressure is generated at the negative pressure port 713, so that air enters from the central through hole of the punching tube 56, flows through the central leak hole 36, the second pipeline 714, the reaction bottle 710, and the negative pressure tube 712 in sequence, and the negative pressure tube 712 is provided with a filter at one end in the reaction bottle 710 to prevent the random sample from being sucked out of the reaction bottle. In the above process, the random sample formed by the punching will flow into the reaction bottle 710 with air. When the light-sensing camera 58 detects that there is no random sample stuck at the punching tube 56, stop generating negative pressure. At this time, the storage container 62 is pressurized from the air inlet 11, so that the digestion solution is pressed into the reaction bottle 710 through the first pipeline 10 under the action of high air pressure.

[0087] Furthermore, in order to prevent the digestion solution from corroding the equipment after volatilization, side panels are provided around the loading area 82. When the lifting plate 79 moves to the loading area 82, the loading area 82 forms a closed space. At this time, the volatile substances generated by the digestion solution only exist in the loading area 82. In order to discharge the volatile substances, an exhaust fan 12 is provided on the back of the loading area 82.

[0088] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An automatic sampling device for fine particle detection samples, comprising a structural frame (1) and a side plate (2) arranged on the surface, characterized in that: Also includes: A sampling assembly (3), the sampling assembly (3) being fixedly connected to the structural frame (1), and being used for shifting the test sample to the stamping area and for collecting random samples formed by stamping; A pressing component (4), the pressing component (4) being arranged above the sampling component (3) and used for positioning the test sample before stamping; A punching assembly (5), the punching assembly (5) being arranged above the pressing assembly (4) and used for punching and sampling the test sample; A digestion solution dispensing device (6) is used to control the delivery of the digestion solution in the device; A lifting platform assembly (7) is used to realize storage, access and loading operations of the reaction bottle (710); Pipeline system, used to assist in the transportation of digestion solution and random samples formed by punching; The sampling assembly (3) comprises a bearing platform (31), a sliding platform (32), a connecting rod (39), a sliding block (310), a guide rod (311) and a second motor (312); wherein: A bearing platform (31) is fixedly connected to the structural frame (1), a slide rail is provided on the upper surface of the bearing platform (1), a central leakage hole (36) is provided on the bearing platform (31), and the central leakage hole (36) is connected to the pipeline system through a pipeline; A slide table (32) is slidably connected to the slide rail of the bearing platform (31), and a punching through hole matching the punching assembly (5) is provided on the upper surface of the slide table (32); A connecting rod (39) is fixedly connected to the rear of the slide (32), and the other end of the connecting rod (39) is slidably connected to the guide rod (311) via a slider (310); A second motor (312) is fixedly connected to the structural frame (1), and a central rotation axis thereof is fixedly connected to one end of the guide rod (311); The pressing assembly (4) comprises: a pressing portion (41), a sleeve portion (42), a mounting block (43), a rotating shaft (44), a bevel gear set (45), a third motor (46), a turbine (47) and a worm (48); wherein: A pressing portion (41) is integrally formed with the sleeve portion (42), and a punching through hole corresponding to the punching assembly is provided on the pressing portion (41); The sleeve portion (42) is fixedly mounted at the center of the rotating shaft (44); A rotating shaft (44), wherein the rotating shaft (44) is positioned on the frame through a mounting block (43); A bevel gear set (45) is fixedly connected to the end of the rotating shaft (44), and the rotating shafts (44) are connected to form a closed loop through the bevel gear set (45) for transmission; The third motor (46) is connected to the turbine (47) connected to the rotating shaft (44) through the worm (48), thereby providing a power source for the rotating shaft; The punching assembly (5) comprises a punching cylinder (51), a positioning plate (52), a punching head (53), a connecting portion (54) and a limiting assembly; wherein: A punching cylinder (51) is fixedly connected to a positioning plate (52) below; A positioning plate (52) having a limiting guide rail (57) on its bottom surface; A punch head (53) is fixedly connected to the lower end of the central axis of the punch cylinder (51) through a connecting portion (54), and a plurality of hollow punch tubes (56) are provided below the punch head (53); The limiting assembly is fixedly connected to the punch head (53) and is used to limit the free rotation of the central axis of the punch cylinder (51). A limiting rod (55) is rotatably connected to the side of the connecting portion (54), and the other end of the limiting rod (55) is slidably connected to the limiting guide rail (57) via a slider.

2. The automatic sampling device for fine particle detection samples according to claim 1, characterized in that: The digestion solution dispensing device (6) comprises a placement table (61), a storage container (62) and a residual quantity detector (63); wherein A placement table (61) fixedly connected to the structural frame (1); A storage container (62) is placed on the placement table (61) and is provided with an air inlet (11) for air to enter the interior of the storage container; The residual amount detector (63) is fixedly connected to the placement table (61) and is used to detect the residual amount of the digestion solution in the storage container.

3. The automatic sampling device for fine particle detection samples according to claim 1, characterized in that: The lifting platform assembly (7) comprises a first mounting plate (71), a second mounting plate (72), a light rod positioning block (75), a fourth motor (73), a screw rod (76), a screw rod nut (78), a lifting plate (79) and a guide light rod (77); wherein: A first mounting plate (71) and a second mounting plate (72) are fixedly connected to the structural frame (1); the first mounting plate (71) is provided with a bearing seat (74) fixedly connected thereto; and the second mounting plate (72) is fixedly connected to polished rod positioning blocks (75) at both upper and lower ends; A fourth motor (73) is fixedly connected to the first mounting plate (71); A screw rod (76) is fixedly connected to the central rotating shaft of the fourth motor (73) via a coupling, and the screw rod nut (78) is arranged on the screw rod (76); A lifting plate (79) is fixedly connected to the screw nut (78); The guide light rod (77) is slidably connected to one side of the lifting plate (79).

4. The automatic sampling device for fine particle detection samples according to claim 1, characterized in that: The pipeline system comprises a reaction bottle (71), a bottle stopper (711), a first pipeline (10) and a second pipeline (714); wherein: A bottle stopper (711) is positioned above the reaction bottle (71), and a negative pressure tube (712) is fixedly provided on the bottle stopper (711); A first pipe (10), one end of which passes through the bottle stopper (711) and is connected to the interior of the reaction bottle (71), and the other end of which is connected to the storage container (62) in the digestion solution distribution device (6), for conveying the digestion solution; The second pipe (714) has one end passing through the bottle stopper (711) and communicating with the interior of the reaction bottle (71), and the other end connected to the central leak hole (36) on the supporting platform (31), and is used to transport the random samples formed by stamping.

5. The automatic sampling device for fine particle detection samples according to claim 1, characterized in that: It also includes a light-sensing camera (58) and a light-emitting unit (38); wherein: Light-sensing cameras (58) are fixedly arranged on both sides of the positioning plate (52) and are used to monitor the permeability of the stamping tube (56); The light-emitting portion (38) is fixed in the working area of ​​the light-sensing camera and is used to assist the light-sensing camera (58) in making judgments.

6. The automatic sampling device for fine particle detection samples according to claim 1, characterized in that: The punching tube (56) disposed below the punching head (53) has at least two length specifications.

7. An automatic sampling device for fine particle detection samples according to any one of claims 1 to 5, characterized in that: Also includes: An exhaust fan (12) is arranged on the side plate and is used to exhaust volatile substances out of the device body.

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