A sampler for microbiological testing

Abstract

The application discloses a sampler for microbial test and belongs to the technical field of samplers, which comprises a supporting mechanism, a vehicle body, a cleaning mechanism, a jet mechanism and a sampling mechanism. The vehicle body comprises a coaming, the supporting mechanism is rotatably installed at the lower side of the coaming, the cleaning mechanism comprises a moving wheel, a motor and a cleaning assembly, the motor is installed in the coaming, the motor provides a power source for a first mounting shaft, the motor is connected with the cleaning assembly, and the cleaning assembly is installed in the coaming. The jet mechanism is installed in the coaming and is connected with the cleaning assembly. The sampling mechanism comprises a rodless cylinder, a first cylinder, a first receiving hopper, a fixing frame and a sampling assembly. The rodless cylinder is rotatably installed at the side of the coaming, the sampling assembly is installed in the coaming, the first receiving hopper is connected with the sampling assembly, the fixing frame is slidably installed at the side of the coaming, and the fixing frame is connected with the first receiving hopper. The application realizes the cleaning of sundries around soil, thereby avoiding the interference on the sampling result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of samplers, and discloses a sampler for microbial testing. BACKGROUND

[0002] Soil microbial testing is one of the important means to study soil ecosystems, which can provide information about the composition, function and activity of microorganisms in soil. In order to accurately and efficiently conduct soil microbial testing, researchers need to collect representative soil samples. Traditional soil sampling methods have some limitations, such as sample contamination, time consumption, and inconvenient operation.

[0003] The patent with publication number CN217651213U discloses a sampling device for microbial testing. The technical solution of the patent is as follows: a core component includes a top cover, a sampling device and a protective tube. The top cover includes an upper cover and a lower cover, and a cavity is formed between the upper cover and the lower cover. A through hole is formed in the bottom of the lower cover. The protective tube is sealingly connected to the lower cover, so that the cavity is in communication with the inner cavity of the protective tube. A drive component includes a housing, a motor and a transmission block. The housing is fixed above the upper cover, and the motor is fixed in the housing. However, the patent cannot sample microorganisms in soil, so a sampler for microbial testing is invented to overcome the defect. SUMMARY

[0004] To solve the above technical problems, the technical solution adopted by the present application is as follows: a sampler for microbial testing, including a vehicle body, a supporting mechanism, a cleaning mechanism, a jet mechanism and a sampling mechanism. The vehicle body includes a coaming. The supporting mechanism is rotatably installed on the lower side of the coaming. The cleaning mechanism includes a moving wheel, a motor and a cleaning assembly. The motor is installed inside the coaming. The motor provides power source for the first mounting shaft. The motor is connected with the cleaning assembly. The cleaning assembly is installed inside the coaming.

[0005] The jet mechanism is installed inside the coaming. The jet mechanism is connected with the cleaning assembly. The sampling mechanism includes a rodless cylinder, a first cylinder, a first receiving hopper, a fixing frame and a sampling assembly. The rodless cylinder is rotatably installed on the side of the coaming. The first cylinder is installed on the upper side of the coaming. The rodless cylinder is connected with the sampling assembly. The sampling assembly is installed inside the coaming. The first receiving hopper is connected with the sampling assembly. The first receiving hopper is installed inside the coaming. The fixing frame slides along the side of the coaming through the sampling assembly. The fixing frame is connected with the first receiving hopper.

[0006] Further, a fixed shaft is fixedly installed on the lower side of the coaming. A rotating frame is rotatably installed on the outer surface of the fixed shaft. A roller shaft is rotatably installed on the side of the rotating frame. A rotating wheel is fixedly installed on the outer surface of the roller shaft. The rotating wheel is rotatably installed on the rotating frame.

[0007] Further, the cleaning assembly comprises a first mounting shaft rotatably mounted on the side of the fence, the first mounting shaft is fixedly connected with the moving wheel, a transmission shaft is fixedly mounted on the side of the first mounting shaft, the transmission shaft is rotatably mounted in the fence, a top plate is fixedly mounted on the fence, a motor is fixedly mounted on the top plate, a first sprocket is mounted on the output end of the motor, the first sprocket is connected with the transmission shaft, and the transmission shaft and the motor form a chain transmission through the first sprocket.

[0008] Further, a mounting plate is further fixedly mounted in the fence, a second mounting shaft is rotatably mounted on the side of the mounting plate, a cleaning roller is fixedly mounted on the second mounting shaft, a second sprocket is mounted on the moving wheel, the second sprocket is connected with the transmission shaft, and the second mounting shaft and the transmission shaft form a chain transmission through the second sprocket, an intermediate rod is fixedly mounted on the mounting plate, a first fixed block is fixedly mounted on the intermediate rod, and the first fixed block is fixedly mounted on the top plate.

[0009] Further, a mesh plate is mounted on the fence, and the air injection mechanism comprises an intermediate bin, the intermediate bin is mounted above the mesh plate, a first partition plate is fixedly mounted on the side of the intermediate bin, the first partition plate is fixedly mounted on the top plate, a conveying pipe is fixedly mounted on the intermediate bin, a pressure booster is fixedly mounted on the conveying pipe, and the pressure booster is fixedly mounted on the top plate.

[0010] Further, a first air cylinder is fixedly mounted on the top plate, a gland is fixedly mounted on the telescopic end of the first air cylinder, a second partition plate is fixedly mounted on the lower side of the top plate, and the pressure booster is fixedly mounted between the first partition plate and the second partition plate.

[0011] Further, the sampling assembly comprises a second fixed block fixedly mounted on the side of the fence, a rodless cylinder is rotatably mounted on the second fixed block, a sliding block is rotatably mounted on the sliding block portion of the rodless cylinder, a right-angle groove is arranged on the side of the fence, a right-angle shaft is fixedly mounted on the inner wall of the right-angle groove, the sliding block is slidably mounted on the outer surface of the right-angle shaft, a spring is wound around the outer surface of the right-angle shaft, one end of the spring is fixedly mounted on the outer surface of the right-angle shaft, the other end of the spring is fixedly mounted on the sliding block, an outer cylinder is fixedly mounted on the side of the sliding block, a second air cylinder is fixedly mounted on the side of the outer cylinder, a supporting rod is fixedly mounted on the telescopic end of the second air cylinder, an inner cylinder is mounted in the outer cylinder, the outer cylinder and the inner cylinder are connected through a plurality of springs, a circular through hole is arranged on the side of the inner cylinder, the radius of the circular through hole of the inner cylinder is equal to that of the supporting rod, and in the initial state, the supporting rod extends into the circular through hole of the inner cylinder.

[0012] Further, the outer cylinder inner surface is fixedly provided with a fixing frame, a gear is rotatably arranged on the fixing frame, a rack is fixedly arranged on the outer part of the inner cylinder, the rack is engaged with the gear, a third air cylinder is fixedly arranged on the inner side of the inner cylinder, a moving frame is fixedly arranged on the extending end of the third air cylinder, the moving frame is located above the inner cylinder, a positioning block is fixedly arranged on the lower side of the moving frame, the positioning block is slidably arranged on the inner cylinder, a plurality of hinges are fixedly arranged on the lower side of the inner cylinder, a rotating shaft is rotatably arranged on each hinge, a turnover plate is fixedly arranged on the outer surface of each rotating shaft, the plurality of turnover plates close the lower part of the inner cylinder in the initial state, and the lower end surface of the positioning block coincides with the lower end surface of the turnover plate in the initial state.

[0013] Further, the first receiving hopper is fixedly arranged in the fence, the fourth air cylinder is fixedly arranged on the side of the first receiving hopper, the driving plate is fixedly arranged on the extending end of the fourth air cylinder, and the driving plate is slidably arranged on the side of the fence and fixedly connected with the second receiving hopper.

[0014] Compared with the prior art, the present application has the following advantages: (1) the present application can clean the sundries around the soil, thereby avoiding interference with the sampling result; (2) the present application can perform sampling at multiple sampling sites, thereby improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0016] Figure 2 It is a schematic diagram of the supporting mechanism structure of the present application.

[0017] Figure 3 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application. Figure 2 It is a schematic diagram of the local enlarged structure at position A in the present application.

[0018] Figure 4 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application.

[0019] Figure 5 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application. Figure 4 It is a schematic diagram of the local enlarged structure at position B in the present application.

[0020] Figure 6 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application.

[0021] Figure 7 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application. Figure 6 It is a schematic diagram of the local enlarged structure at position C in the present application.

[0022] Figure 8 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application.

[0023] Figure 9 It is a schematic diagram of the connection relationship between the second mounting shaft and the mounting plate of the present application.

[0024] Figure 10 As Figure 9 Partial enlarged structural schematic view at D.

[0025] Figure 11 Schematic view of the connection relationship between the internal cylinder and the rack of the present application.

[0026] Figure 12 As Figure 11 Partial enlarged structural schematic view at E.

[0027] Figure 13 Schematic view of the internal cylinder structure of the present application.

[0028] Figure 14 As Figure 13 Partial enlarged structural schematic view at F.

[0029] Figure 15 Schematic view of the sampling mechanism structure of the present application.

[0030] Figure 16 As Figure 15 Partial enlarged structural schematic view at G.

[0031] The drawings are as follows: 1 - support mechanism; 2 - vehicle body; 3 - cleaning mechanism; 4 - air jet mechanism; 5 - sampling mechanism; 101 - rotating frame; 102 - rotating wheel; 103 - fixed shaft; 104 - roller shaft; 201 - top plate; 202 - coaming; 301 - moving wheel; 302 - first mounting shaft; 303 - cleaning roller; 304 - mesh plate; 305 - second mounting shaft; 306 - mounting plate; 307 - first fixed block; 308 - intermediate rod; 309 - motor; 310 - motor support; 311 - first sprocket; 312 - second sprocket; 313 - transmission shaft; 401 - booster; 402 - first partition; 403 - conveying pipe; 404 - intermediate bin; 501 - second fixed block; 502 - rodless cylinder; 503 - first cylinder; 504 - sliding block; 505 - right-angle groove; 506 - right-angle shaft; 507 - spring; 508 - gland; 509 - second partition; 510 - external cylinder; 511 - second cylinder; 512 - first receiving hopper; 513 - support rod; 514 - internal cylinder; 515 - rack; 516 - fixed frame; 517 - gear; 518 - turnover plate; 519 - positioning block; 520 - hinge; 521 - rotating shaft; 522 - moving frame; 523 - third cylinder; 524 - positioning hole; 525 - fourth cylinder; 526 - second receiving hopper; 527 - driving plate. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be further illustrated below in combination with and through specific embodiments.

[0033] Wherein, the drawings are only for example, the representation is only a schematic diagram, and not a physical diagram, and cannot be understood as a limitation of the patent; in order to better illustrate the embodiments of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0034] As shown in the accompanying Figure 1 As shown in the accompanying Figure 10 The vehicle body 2 includes a coaming 202, a fixed shaft 103 is fixedly installed on the lower side of the coaming 202, a rotating frame 101 is rotatably installed on the outer surface of the fixed shaft 103, a roller shaft 104 is rotatably installed on the side surface of the rotating frame 101, and a rotating wheel 102 is fixedly installed on the outer surface of the roller shaft 104. The rotating wheel 102 is rotatably installed on the rotating frame 101.

[0035] As shown in the accompanying Figure 2 As shown in the accompanying Figure 12 The cleaning mechanism 3 includes a moving wheel 301, a first mounting shaft 302, and a motor 309. The motor 309 is installed inside the coaming 202, and provides a power source for the first mounting shaft 302. The motor 309 is connected to a cleaning assembly, which is installed inside the coaming 202. The first mounting shaft 302 is rotatably installed on the side surface of the coaming 202, and is fixedly connected to the moving wheel 301. A transmission shaft 313 is fixedly installed on the side surface of the first mounting shaft 302, and is rotatably installed inside the coaming 202. A top plate 201 is fixedly installed on the coaming 202, and a motor bracket 310 is fixedly installed on the top plate 201. The motor 309 is fixedly installed on the motor bracket 310, and a first sprocket 311 is installed on the output end of the motor 309. The first sprocket 311 is connected to the transmission shaft 313, and the transmission shaft 313 and the motor 309 form a chain transmission through the first sprocket 311. An installation plate 306 is also fixedly installed inside the coaming 202, and a second mounting shaft 305 is rotatably installed on the side surface of the installation plate 306. A cleaning roller 303 is fixedly installed on the second mounting shaft 305. A second sprocket 312 is installed on the moving wheel 301, and is connected to the transmission shaft 313. The second mounting shaft 305 and the transmission shaft 313 form a chain transmission through the second sprocket 312. An intermediate rod 308 is fixedly installed on the installation plate 306, and a first fixed block 307 is fixedly installed on the intermediate rod 308. The first fixed block 307 is fixedly installed on the top plate 201.

[0036] As shown in the accompanying Figure 3 As shown in the accompanying Figure 14As shown, the fence 202 is provided with a screen plate 304, the air injection mechanism 4 comprises an intermediate bin 404, the intermediate bin 404 is installed above the screen plate 304, the intermediate bin 404 is fixedly provided with a first partition plate 402 on the side, the first partition plate 402 is fixedly installed on the top plate 201, the intermediate bin 404 is fixedly provided with a conveying pipe 403, the conveying pipe 403 is fixedly provided with a pressure booster 401, the pressure booster 401 is fixedly installed on the top plate 201; the first air cylinder 503 is fixedly installed on the top plate 201, the first air cylinder 503 is fixedly provided with a gland 508 at the telescopic end, the gland 508 is provided with an electromagnet, the top plate 201 is fixedly provided with a second partition plate 509 on the lower side, the pressure booster 401 is fixedly installed between the first partition plate 402 and the second partition plate 509.

[0037] As shown in the accompanying drawings Figure 4 As shown in the accompanying drawings Figure 16As shown, the sampling mechanism 5 comprises a second fixed block 501, a rodless cylinder 502, a first cylinder 503, a first receiving hopper 512 and a fixed frame 516, the rodless cylinder 502 is rotatably installed on the side of the fence 202, the first cylinder 503 is installed on the upper side of the fence 202, the first receiving hopper 512 is installed inside the fence 202, the fixed frame 516 is connected with the first receiving hopper 512, the second fixed block 501 is fixedly installed on the side of the fence 202, the rodless cylinder 502 is rotatably installed on the second fixed block 501, a sliding block 504 is rotatably installed on the sliding block part of the rodless cylinder 502, a right-angle groove 505 is arranged on the side of the fence 202, a right-angle shaft 506 is fixedly installed on the inner wall of the right-angle groove 505, the sliding block 504 is slidably installed on the outer surface of the right-angle shaft 506, a spring 507 is wound on the outer surface of the right-angle shaft 506, one end of the spring 507 is fixedly installed on the outer surface of the right-angle shaft 506, the other end of the spring 507 is fixedly installed on the sliding block 504, an outer cylinder 510 is fixedly installed on the side of the sliding block 504, a second cylinder 511 is fixedly installed on the side of the outer cylinder 510, a supporting rod 513 is fixedly installed at the telescopic end of the second cylinder 511, an inner cylinder 514 is installed inside the outer cylinder 510, the outer cylinder 510 and the inner cylinder 514 are connected through a plurality of springs, a positioning hole 524 is arranged on the side of the inner cylinder 514, the radius of the positioning hole 524 is equal to that of the supporting rod 513, and the supporting rod 513 extends into the positioning hole 524 of the sampling mechanism 5 in the initial state; the fixed frame 516 is fixedly installed on the inner surface of the outer cylinder 510, a gear 517 is rotatably installed on the fixed frame 516, a rack 515 is fixedly installed outside the inner cylinder 514, the rack 515 is engaged with the gear 517, a third cylinder 523 is fixedly installed on the inner side of the inner cylinder 514, a moving frame 522 is fixedly installed at the telescopic end of the third cylinder 523, the moving frame 522 is located above the inner cylinder 514, a positioning block 519 is fixedly installed on the lower side of the moving frame 522, the positioning block 519 is slidably installed on the inner cylinder 514, a plurality of hinges 520 are fixedly installed on the lower side of the inner cylinder 514, a rotating shaft 521 is rotatably installed on each hinge 520, a turnover plate 518 is fixedly installed on the outer surface of each rotating shaft 521, the lower end surface of the positioning block 519 coincides with the lower end surface of the turnover plate 518 in the initial state, and the plurality of turnover plates 518 close the lower part of the inner cylinder 514 in the initial state; the first receiving hopper 512 is fixedly installed inside the fence 202, a fourth cylinder 525 is fixedly installed on the side of the first receiving hopper 512, a driving plate 527 is fixedly installed at the telescopic end of the fourth cylinder 525, the driving plate 527 is slidably installed on the side of the fence 202, and the driving plate 527 is fixedly connected with a second receiving hopper 526.

[0038] The working principle of the present application is as follows.

[0039] (I) motor 309 starts, motor 309 drives transmission shaft 313 to rotate through first sprocket 311, transmission shaft 313 drives moving wheel 301 to rotate through first mounting shaft 302, and then the whole driving device moves, transmission shaft 313 drives cleaning roller 303 to rotate through second sprocket 312, and then the ground is cleaned, at the same time, supercharger 401 starts, supercharger 401 drives high-pressure gas to discharge through mesh plate 304 through first partition plate 402, and then the sundries below top plate 201 are cleaned.

[0040] (II) then first cylinder 503 and second cylinder 511 start at the same time, second cylinder 511 drives support rod 513 to withdraw from positioning hole 524, first cylinder 503 drives gland 508 to move, electromagnet on gland 508 starts, when gland 508 contacts inner cylinder 514, inner cylinder 514 is pressed to move by turnover plate 518, when inner cylinder 514 contacts soil, inner cylinder 514 is continuously pressed to move by turnover plate 518, so that soil lifts turnover plate 518, and soil is collected into inner cylinder 514, then inner cylinder 514 is driven to rise by gland 508, when it rises to the initial position, second cylinder 511 starts, and support rod 513 is driven to move reversely by second cylinder 511 to extend into positioning hole 524.

[0041] (III) rodless cylinder 502 starts, slide block 504 is driven to slide along right-angle shaft 506 by the slide block part of rodless cylinder 502, and then outer cylinder 510 is driven to move, when outer cylinder 510 moves to the upper side of first receiving hopper 512, third cylinder 523 starts, positioning block 519 is driven to rise by moving frame 522, then turnover plate 518 rotates under the action of soil gravity, and then the soil is sent into first receiving hopper 512, then fourth cylinder 525 starts, second receiving hopper 526 is driven to move by plate 527, and then the soil in first receiving hopper 512 is taken by second receiving hopper 526.

[0042] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The scope of the application is defined by the appended claims rather than by the description of the specification, and therefore all changes that fall within the meaning and range of equivalents of the claims are intended to be embraced therein, and no picture reference in the claims should be considered limiting the claims concerned.

Claims

1. A sampler for microbial testing, comprising a vehicle body (2), characterized in that: The sampler used for microbial testing also includes a support mechanism (1), a cleaning mechanism (3), an air jet mechanism (4), and a sampling mechanism (5). The vehicle body (2) includes a side panel (202). The support mechanism (1) is rotatably mounted on the underside of the side panel (202). The cleaning mechanism (3) includes a motion wheel (301), a motor (309), and a cleaning assembly. The motor (309) is installed inside the side panel (202) and provides a power source for the first mounting shaft (302). The motor (309) is connected to the cleaning assembly, which is installed inside the side panel (202). The jetting mechanism (4) is installed inside the enclosure (202) and is connected to the cleaning assembly. The sampling mechanism (5) includes a rodless cylinder (502), a first cylinder (503), a first receiving bucket (512), a fixing frame (516), and a sampling assembly. The rodless cylinder (502) is rotatably installed on the side of the enclosure (202). The first cylinder (503) is installed on the upper side of the enclosure (202). The rodless cylinder (502) is connected to the sampling assembly and is installed inside the enclosure (202). The first receiving bucket (512) is connected to the sampling assembly and is installed inside the enclosure (202). The fixing frame (516) slides along the side of the enclosure (202) through the sampling assembly and is connected to the first receiving bucket (512). The sampling assembly includes a second fixing block (501), which is fixedly installed on the side of the enclosure (202). A rodless cylinder (502) is rotatably installed on the second fixing block (501). A sliding block (504) is rotatably installed on the slider part of the rodless cylinder (502). A right-angle groove (505) is provided on the side of the enclosure (202). A right-angle shaft (506) is fixedly installed on the inner wall of the right-angle groove (505). The sliding block (504) is slidably installed on the outer surface of the right-angle shaft (506). A spring (507) is wound on the outer surface of the right-angle shaft (506). One end of the spring (507) is fixedly installed on the outer surface of the right-angle shaft (506), and the other end of the spring (507) is fixedly installed on the sliding block (504). An outer cylinder (510) is fixedly installed on the side of the sliding block (504). A second cylinder (511) is fixedly installed on the side of the outer cylinder (510). A support rod (513) is fixedly installed on the telescopic end of the second cylinder (511). An inner cylinder (514) is installed inside the outer cylinder (510). The outer cylinder (510) and the inner cylinder (514) are connected by multiple springs. A circular through hole is provided on the side of the inner cylinder (514). The radius of the circular through hole of the inner cylinder (514) is equal to that of the support rod (513). In the initial state, the support rod (513) extends into the circular through hole of the inner cylinder (514).

2. A sampler for microbial testing according to claim 1, characterized in that: The cleaning assembly includes a first mounting shaft (302), which is rotatably mounted on the side of the enclosure (202). The first mounting shaft (302) is fixedly connected to the motion wheel (301). A transmission shaft (313) is fixedly mounted on the side of the first mounting shaft (302). The transmission shaft (313) is rotatably mounted inside the enclosure (202). A top plate (201) is fixedly mounted on the enclosure (202). A motor (309) is fixedly mounted on the top plate (201). A first sprocket (311) is mounted on the output end of the motor (309). The first sprocket (311) is connected to the transmission shaft (313). The transmission shaft (313) and the motor (309) form a chain drive through the first sprocket (311).

3. A sampler for microbial testing according to claim 2, characterized in that: An installation plate (306) is also fixedly installed inside the enclosure (202). A second installation shaft (305) is rotatably installed on the side of the installation plate (306). A cleaning roller (303) is fixedly installed on the second installation shaft (305). A second sprocket (312) is installed on the motion wheel (301). The second sprocket (312) is connected to the drive shaft (313). The second installation shaft (305) and the drive shaft (313) form a chain drive through the second sprocket (312). An intermediate rod (308) is fixedly installed on the installation plate (306). A first fixing block (307) is fixedly installed on the intermediate rod (308). The first fixing block (307) is fixedly installed on the top plate (201).

4. A sampler for microbial testing according to claim 2, characterized in that: The first cylinder (503) is fixedly installed on the top plate (201). A pressure cap (508) is fixedly installed on the telescopic end of the first cylinder (503). A second partition (509) is fixedly installed on the lower side of the top plate (201). The booster (401) is fixedly installed between the first partition (402) and the second partition (509).

5. A sampler for microbial testing according to claim 4, characterized in that: A fixed frame (516) is fixedly installed on the inner surface of the outer cylinder (510), and a gear (517) is rotatably installed on the fixed frame (516). A rack (515) is fixedly installed on the outside of the inner cylinder (514), and the rack (515) meshes with the gear (517). A third cylinder (523) is fixedly installed on the inner side of the inner cylinder (514). A movable frame (522) is fixedly installed on the telescopic end of the third cylinder (523). The movable frame (522) is located above the inner cylinder (514). A positioning block (519) is fixedly installed on the lower side of the movable frame (522). The positioning block (519) is slidably installed on the inner cylinder (514). Multiple hinges (520) are fixedly installed on the lower side of the inner cylinder (514). A rotating shaft (521) is rotatably installed on each hinge (520). A flip plate (518) is fixedly installed on the outer surface of each rotating shaft (521).

6. A sampler for microbial testing according to claim 5, characterized in that: In the initial state, multiple flip plates (518) close the lower part of the inner cylinder (514), and in the initial state, the lower end face of the positioning block (519) coincides with the lower end face of the flip plate (518).

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