Sampling device

Abstract

The sampling device comprises a pipe body, a pipe cover and a sampling rod, the sampling rod is connected with the pipe cover, the top end of the sampling rod extends out of the pipe cover from the inside of the pipe body, and a vertically-through cavity is formed in the sampling rod in the axis direction of the sampling rod; a shielding assembly is arranged on the sampling rod and comprises a fixing plate coaxially arranged on the side wall of the sampling rod, the outer diameter of the fixing plate is smaller than the inner diameter of the pipe body, and a plurality of blocking pieces which are adjacent to one another and can be connected in an upward overturning mode are arranged on the periphery of the fixing plate in a surrounding mode. The multiple blocking pieces are in a sector shape with the narrow inside and the wide outside and are distributed in a radial shape with the fixing plate as the center, and the fixing plate is further provided with a supporting plate used for preventing the blocking pieces from turning over and drooping to the position below the fixing plate. The visual line of a sample can be blurred during sampling, so that a detector does not need to directly look at the shape of the sample, judgment on the position of the sample is not affected, the acquisition process is not affected, the discomfort of the detector is reduced, the detection burden is relieved, and the method has a very good application value in rapid product detection.

Description

Technical Field

[0001] The invention relates to the technical field of medical detection equipment, and in particular to a sampling device for collecting feces. Background Art

[0002] In the detection of bacterial and viral infections, the use of feces as a test sample is currently a common method. Feces, as human waste, becomes a test sample for bacteria, viruses and other related indicators. It has the advantages of less damage to the human body and convenient sampling. For example, the detection of hepatitis A virus. Hepatitis A (HAV for short) is a type of viral hepatitis caused by hepatitis A virus. It is mainly transmitted through the fecal-oral route, that is, the hepatitis A virus in the patient's feces or blood during the incubation period or acute period contaminates water, food, utensils and close contact in life and enters the gastrointestinal tract through the mouth. Studies have shown that hepatitis A patients can excrete HAV with feces in the second half of the incubation period. By detecting HAV in feces, the source of infection can be discovered as early as possible and the spread of the epidemic can be controlled at the source.

[0003] Because the composition of fecal samples is complex, individual differences are large, and the content of the substance to be detected is low, it is generally necessary to first use a sampling stick to collect a small amount of sample from the original feces before testing, and then insert the sampling stick into the sampling bottle, dilute and mix it with the processing liquid in the sampling bottle, and finally take a certain amount of the mixed solution for testing. For example, as shown in US Pat. No. 5,543,115A, a long groove is formed at the bottom of the collection stick. When the collection stick is inserted into the fecal sample, the sample adheres to the groove to complete the collection work.

[0004] At present, the conventional feces sampling process is to use a collection stick to take samples from different parts of the feces, which requires close contact with the feces. It has a certain impact on the vision of the testers, easily causing discomfort, reducing the enthusiasm for testing, and is not conducive to the promotion and application of the product. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a sampling device, which can blur the line of sight of the sample during sampling by arranging a shielding component on the sampling rod, so that the detection personnel do not need to look directly at the sample shape and does not affect the judgment of the sample position, thereby ensuring that the collection process is not affected, reducing the discomfort of the detection personnel and alleviating the detection burden.

[0006] The sampling device comprises a tube body, a tube cover arranged at the top of the tube body and a sampling rod inserted in the tube body, the sampling rod is fixedly connected to the tube cover and the top of the sampling rod extends out of the tube body and outside the tube cover, and the sampling rod is provided with a chamber that passes through from top to bottom along its axial direction; a shielding assembly is arranged on the sampling rod, and the shielding assembly comprises a fixing plate coaxially arranged on the side wall of the sampling rod, the outer diameter of the fixing plate is smaller than the inner diameter of the tube body, and a plurality of baffles are arranged on the outer circumference of the fixing plate, which are adjacent to each other and can be turned upside down, and the plurality of baffles are arranged in a The baffles are fan-shaped, narrow inside and wide outside, and are radially distributed with the fixed plate as the center. A support plate is also provided on the fixed plate to prevent the baffles from flipping and drooping to the bottom of the fixed plate. When the baffles are flipped upward, adjacent baffles fold with each other to facilitate the insertion of the sampling rod into the tube body. When the sampling rod is taken out of the tube body, the multiple baffles automatically flip downward under the action of gravity and then unfold to form a disc that is roughly in the same plane as the fixed plate. When observed from the tube cover along the axial direction of the sampling rod, the unfolded shielding assembly forms a disc-shaped barrier that blocks the line of sight.

[0007] A further technical solution is that the multiple baffles are arranged side by side and shoulder to shoulder, and the gap between adjacent baffles is less than 0.3 mm.

[0008] A further technical solution is that the plurality of baffles are sequentially arranged in two rows at intervals, and the side portions of two adjacent baffles are stacked up and down to form a complete disc-shaped visual barrier.

[0009] A further technical solution is that the cross-sectional shape formed by the multiple baffles is set such that the inner circle is a regular polygon that matches the outer circle of the fixing plate, and the outer circle is a circle.

[0010] A further technical solution is: an inwardly concave rotation groove is provided on each outer side surface of the fixed plate, and a linkage plate adapted to the rotation groove is provided at one end of the baffle close to the fixed plate, the linkage plate extends into the rotation groove and is rotatably connected thereto through a rotating shaft.

[0011] A further technical solution is: one end of the support plate is fixedly connected to the bottom of the rotating groove, and the other end extends horizontally to below the linkage plate.

[0012] A further technical solution is that a plurality of liquid inlet holes communicating with the chamber are arranged on one end of the side wall of the sampling rod close to the tube cover.

[0013] A further technical solution is that a plurality of stirring plates are symmetrically arranged at the bottom of the fixed plate with the center of the fixed plate as the center.

[0014] A further technical solution is that the fixing plate and the blocking piece are configured to be translucent.

[0015] A further technical solution is: the fixing plate and the linkage plate are made of hard plastic, and the blocking piece is made of soft plastic.

[0016] The beneficial effects of the present invention are as follows: the present application provides a shielding assembly on the sampling rod, and the shielding assembly includes a fixed plate and a plurality of baffles arranged around the fixed plate. When it is necessary to collect a fecal sample, the sampling rod is taken out from the tube body, and the baffles on the fixed plate lose resistance and flip to a horizontal state under the action of gravity. A plurality of adjacent baffles are radially distributed around the periphery of the fixed plate of the sampling rod to form a shield, which can blur the line of sight of the sample during sampling, avoid the inspector from looking directly at the sample shape, and do not affect the judgment of the sample position, thereby ensuring that the collection process is not affected, reducing the discomfort of the inspector, and alleviating the burden of detection. It can better meet the requirements of rapid detection products for sample collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the disassembly of the sampling device of the present invention.

[0018] Figure 2 This is a schematic diagram of using a sampling rod to collect samples.

[0019] Figure 3 It is a side cross-sectional view when collecting samples using a sampling rod.

[0020] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0021] Figure 5 It is a schematic diagram of the sampling device mixing after the sampling rod is inserted into the tube body.

[0022] Figure 6 This is a schematic diagram of the sampling device being turned upside down and the sample liquid dripping out.

[0023] Figure 7 is a schematic diagram of a shielding component in an embodiment.

[0024] Figure 8 The diagram is a schematic diagram of the distribution of baffles in one embodiment.

[0025] Fig. 9 Schematic diagram of distribution of baffles in another embodiment.

[0026] Fig.10 It is a partial schematic diagram of the connection between the baffle and the fixed plate when the sampling rod is sampling.

[0027] Fig.11 It is a partial schematic diagram of the connection between the baffle and the fixing plate when the sampling rod is inserted into the tube body.

[0028] Fig.12 This is a partial schematic diagram of the disassembled connection between the baffle and the fixed plate.

[0029] Fig.13It is a schematic diagram of the structure of a hepatitis A antigen test strip.

[0030] Fig.14 This is a schematic diagram of using a sampling device to detect a sample.

[0031] Reference numerals: 100. Sampling device, 1. Tube body, 2. Tube cover, 3. Sampling rod, 31. Chamber, 32. Liquid inlet, 4. Shielding assembly, 41. Fixed plate, 42. Blocking piece, 43. Rotating groove, 44. Linking plate, 45. Rotating shaft, 46. Support plate, 5. Stirring plate, 200. Test strip, 201. Sample pad, 202. Marking pad, 203. Detection pad, 204. Absorbent pad, 205. Bottom card, 300. Reagent box, 400. Treatment liquid, 500. Sample. DETAILED DESCRIPTION

[0032] like Figure 1-Figure 6 The sampling device 100 shown includes a tube body 1, a tube cover 2 disposed on the top of the tube body 1, and a sampling rod 3 inserted into the tube body 1. Specifically, the tube body 1 is configured to be cylindrical. An opening is provided at the top of the tube body 1, and a thread is provided on the side wall of the opening and is threadedly connected to the tube cover 2.

[0033] The sampling rod 3 is fixedly connected to the tube cover 2 and the top of the sampling rod 3 extends from the tube body 1 to the outside of the tube cover 2. The sampling rod 3 is provided with a chamber 31 which passes through from top to bottom along its axial direction. The chamber 31 serves as a channel for the sample liquid to flow out.

[0034] The sampling rod 3 is provided with a shielding assembly 4, which includes a fixed plate 41 coaxially arranged on the side wall of the sampling rod 3, the outer diameter of the fixed plate 41 is smaller than the inner diameter of the tube body 1, and a plurality of baffles 42 are arranged around the outer circumference of the fixed plate 41, which are adjacent to each other and can be turned upwards. The baffles 42 are fan-shaped with narrow inside and wide outside and are radially distributed with the fixed plate as the center. A support plate 46 is also arranged on the outer circumference of the fixed plate 41, and the support plate 46 is used to prevent the baffles 42 from turning to the bottom of the fixed plate 41. When the baffles turn upward, the adjacent baffles fold each other to facilitate the insertion of the sampling rod into the tube body; when the sampling rod is taken out of the tube body, the plurality of baffles automatically turn downward under the action of gravity and unfold to form a disk roughly in the same plane as the fixed plate. When observed from the tube cover along the axis direction of the sampling rod, the unfolded shielding assembly forms a disk-shaped barrier that blocks the line of sight.

[0035] In one embodiment, Figure 2As shown, a plurality of baffles are arranged side by side, and the gap between adjacent baffles is less than 0.3 mm. When the baffles 42 are turned down, all the baffles 42 are unfolded to be roughly in the same plane with the fixing plate 41 (rather than drooping), forming a disc-shaped shield for the fecal sample during sampling; when the baffles 42 are turned up, the baffles are staggered and folded upward so that the adjacent baffles are folded and stored inside the tube body.

[0036] In another embodiment, Figure 7 As shown, a plurality of baffles 42 are sequentially arranged in two rows with intervals up and down, and the side portions of two adjacent baffles 42 are stacked up and down to form a complete disc-shaped visual barrier. Figure 7 In the embodiment shown, all the baffles 42 are roughly in the same plane as the fixing plate 41 after being unfolded. The orthographic projection formed by all the baffles unfolding around the fixing plate is a complete disc shape, so that the shielding ability of the baffles 42 is stronger, and when the sampling rod 3 is put into the tube body 1, two adjacent baffles 42 are staggered and folded upward so that the adjacent baffles 42 are folded and stored.

[0037] Specifically, in one solution, the fixing plate 41 and the sampling rod 3 are manufactured in one piece; in another solution, the fixing plate 41 is manufactured separately and then assembled and fixed to the sampling rod 3 .

[0038] The cross-sectional shape of the fixing plate 41 is set to be circular in the inner circle and regular polygon in the outer circle. Preferably, the number of sides of the regular polygon in the outer circle of the cross-sectional shape of the fixing plate 41 is 6 to 12, so that when the baffle 42 is turned over, it is convenient to store and fold the baffle 42. In one embodiment, Figure 8 As shown, the cross-sectional shape of the fixing plate 41 is set to be a regular dodecagon with the inner circle as the center and the outer circle as the center. Fig. 9 As shown, the cross-sectional shape of the fixed plate 41 is set to be a regular octagon with the inner circle as the center. The cross-sectional shape formed by the multiple baffles 42 is set to be a regular polygon with the inner circle matching the outer circle of the fixed plate 41, and the outer circle is a circle; by setting the inner circle to be a regular polygon, so that it matches the outer circle of the fixed plate 41, each baffle 42 can be turned over, and by setting the outer circle to be a circle, the covering area can be increased with maximum efficiency.

[0039] In one embodiment, the baffles 42 and the fixed plate 41 are connected to each other in a flippable manner through a rotating shaft hinge. A support plate 46 is provided below each baffle 42, one end of the support plate 46 is fixedly connected to the outer peripheral side wall of the fixed plate 41, and the other end extends horizontally to the bottom of the baffle 42. The sum of twice the extension length of the support plate 46 and the outer diameter of the fixed plate 41 is less than the inner diameter length of the tube body 1. When the baffle 42 flips upward, the adjacent baffles 42 fold over each other; when the baffle 42 flips downward, the support plate 46 supports the baffle 42 and makes it approximately in or tends to be horizontal.

[0040] In another embodiment, Figure 10-12 As shown, each outer side surface of the fixed plate 41 is provided with a concave rotation groove 43, and a linkage plate 44 matching the rotation groove 43 is provided at one end of the baffle 42 close to the fixed plate 41, and the linkage plate 44 extends into the rotation groove 43 and is rotatably connected thereto through a rotation shaft 45. The rotation groove 43 is through-through, and the groove walls on both sides of the rotation groove 43 are provided with rotation shafts 45 matching the two sides of the linkage plate 44. One end of the support plate 46 is fixedly connected to the bottom of the rotation groove 43, and the other end extends horizontally to the bottom of the linkage plate 44, which can support the baffle 42 and the linkage plate 44, thereby preventing the baffle 42 from further turning over to the bottom of the fixed plate 41, and ensuring that each baffle 42 is in or close to a horizontal state.

[0041] like Figure 4 As shown, a plurality of liquid inlet holes 32 connected to the chamber 31 are provided on the side wall of the sampling rod 3 near the tube cover 2. By providing the liquid inlet holes 32, when the tube body 1 is turned over, the sample liquid in the tube body 1 can also flow from the liquid inlet holes 32 near the tube cover 2 to the chamber 31, which can speed up the flow of the sample liquid.

[0042] like Figure 3 As shown, in one embodiment, a plurality of stirring plates 5 are symmetrically arranged at the bottom of the fixed plate 41 with its center as the center. When the sampling rod 3 is rotated, the stirring plates 5 can quickly and evenly mix the stool sample 500 and the processing liquid 400.

[0043] The tube body 1, tube cover 2 and sampling rod 3 of the sampling device 100 are all made of polyethylene material. The tube body 1 is transparent or translucent, which is convenient for observing the internal situation of the tube body 1. In order to facilitate the smooth flow of the sample liquid in the tube body 1, a part of the tube body 1 is set to be elastic, so that the tube body 1 can be squeezed, the tube body 1 is deformed, and the sample liquid in the tube body 1 flows to the chamber 31 of the sampling rod 3 and flows out from the dripper.

[0044] The fixing plate 41 and the baffle 42 are set to be translucent. When sampling, the detection personnel can blur the line of sight of the stool sample 500 to avoid direct close observation, but will not completely block the line of sight and affect the judgment of the position of the sample 500. In another embodiment, the fixing plate 41 and the baffle 42 can also be made of opaque materials, and the detection personnel can perceive the sampling situation according to the sense of touch during sampling, and at the same time, the stool sample cannot be seen at all, which solves the discomfort during sampling.

[0045] The fixing plate 41 and the linkage plate 44 are made of hard plastic to ensure stability during rotation. To ensure that the baffle 42 can be completely stored in the tube body 1 when flipped, the baffle 42 is made of soft plastic or rubber with elasticity and flexibility, or a part of it can be a hard frame and the other part can be a flexible hydrophobic wax paper, waterproof cloth or other materials. Preferably, the diameter of the shielding component 4 after unfolding is at least 2-4 times the outer diameter of the tube body 1, so that the shielding area can be increased as much as possible and the shielding component can be inserted into the tube body after being folded.

[0046] In order to allow the sampling rod 3 to pick up a sufficient amount of sample at one time, the surface of the bottom of the sampling rod 3 is set to an uneven or irregular surface to enhance the adhesion to the sample 500, so that the sample 500 is not easy to fall off during the picking process. Specifically, the surface of the bottom of the sampling rod 3 is set to a spiral surface with a thread structure, so that it has multiple spiral grooves, which can obtain more fecal samples, avoid multiple operations by the sampler, reduce discomfort, and is not easy to fall off during picking, reducing contamination.

[0047] When sampling, turn the tube cover 2 and take out the sampling rod 3 through the tube cover 2. Figure 2 As shown, the baffles 42 on the sampling rod 3 flip downward after losing the constraint of the side wall of the tube body 1, and remain in a horizontal state under the support of the support plate 46, so that the baffles 42 are radially distributed around the outside of the fixed plate 41. The tester controls the bottom of the sampling rod 3 to collect the fecal sample 500. At this time, the multiple baffles 42 on the sampling rod 3 can blur the line of sight of the sample 500 above the sample 500, but will not affect the tester's judgment on the position of the sample 500, avoid the tester from looking directly at the sample 500, and reduce the tester's discomfort. After the collection is completed, align the fixed plate 41 on the sampling rod 3 with the top tube opening of the tube body 1 and extend it inward. At this time, the baffles 42 on the fixed plate 41 are squeezed by the tube wall of the tube body 1 and flipped upward, as shown in FIG. Figure 5 As shown, since the baffle 42 is made of soft plastic, it has a certain elasticity and toughness, and can be folded together to squeeze the space and then stored in the tube body 1. Tighten the tube cover 2 and shake the tube body to fully mix the treatment liquid 400 in the tube body with the sample 500 on the sampling rod 3. In the scheme where a stirring plate 5 is provided at the bottom of the fixed plate 41, by rotating the tube cover 2 back and forth, the stirring plate is driven to rotate repeatedly, and the stirring plate stirs the liquid sample, thereby accelerating the speed at which the fecal sample 500 dissolves into the treatment liquid, and obtaining the required sample solution (i.e., the liquid to be tested). Figure 6 As shown, the tube body is inverted so that the sample liquid flows out from the opening of the sampling rod 3 near the end of the tube cover 2 through the chamber 31 of the sampling rod 3.

[0048] Sample detection method of the sampling device of this application: 1. Testing materials Test sample: Human feces sample Verified product: Hepatitis A antigen test strips 200 (1) Test strip components: Quality control area (C): goat anti-mouse IgG polyclonal antibody Test area (T): HAV antibody-1 Label pad: HAV antibody-2 Sample treatment solution: sodium chloride (0.09%) + EDTA (0.5%) (2) Preparation of test strip 20: The test strip 20 includes a sample pad 201, a marking pad 202, a detection pad 203, a water-absorbing pad 204 and a bottom card 205. The water-absorbing pad 204 is made of absorbent paper.

[0049] Preparation of the detection pad 203. The detection pad 203 uses a nitrocellulose membrane (NC membrane) as a carrier, and there are two lines on the NC membrane, namely the detection line T line and the control line C line. The detection line T line is fixed with HAV antibody-1 at a concentration of 1.0 mg / ml, the dilution buffer is PB buffer, and the pH value is 7.0~8.0. The quality control line C line is fixed with sheep anti-mouse IgG polyclonal antibody at a concentration of 0.5 mg / ml, the dilution buffer is PB buffer, and the pH value is 7.0~8.0. The T line and the C line are fixed on the NC membrane by a film dispenser. After the film dispenser is processed, the detection pad can be placed in a 37°C oven for drying.

[0050] Preparation of the marking pad 202: The marking pad 202 uses glass fiber as a carrier, and the marking solution is processed on the glass fiber by a spraying machine. The marking solution can be obtained by mixing HAV antibody-2 and latex microspheres for covalent coupling, and the concentration is 0.2%, wherein the dilution buffer is 0.05M Tris+0.5% BSA. After the spraying machine is processed, the marking pad is placed in a 37°C oven for drying.

[0051] Preparation of sample pad 201. Sample pad 201 uses glass fiber as a carrier, and sprays the sample pad treatment solution on the glass fiber. The sample pad treatment solution is: 0.05M Tris+0.5% Tween-20+0.5% BSA+ 0.2% Proclin 300. The treated sample pad is placed in a 37°C oven for drying.

[0052] Assemble the test strip 20. Assemble the processed structures according to the conventional test strips. Fig.13 In the order shown, the detection pad 203 is assembled first, one end of the absorbent pad 204 covers the downstream end of the detection pad 203, the downstream end of the marking pad 202 covers the upstream end of the detection pad 203, and the downstream end of the sample pad 201 covers the upstream end of the marking pad 202. The assembled sample pad 201, marking pad 202, detection pad 203 and absorbent pad 204 are all fixed on the bottom card 205.

[0053] (3) Test strip principle Highly specific antigen-antibody reaction and immunochromatography techniques are used to qualitatively detect whether the stool sample contains HAV antigen. The reagent contains HAV antibody-1 that is pre-fixed in the test area (T line) on the nitrocellulose membrane and goat anti-mouse IgG polyclonal antibody in the quality control area (C line). The labeled HAV antibody-2 is contained in the label pad. During the test, the HAV antigen in the sample combines with the labeled antibody-2 to form a complex. Under the action of chromatography, the complex moves forward along the nitrocellulose membrane, and when passing through the test area (T line), it combines with the HAV antibody-1 coated on the membrane, forming a red reaction band in the test area (T line). The labeled HAV antibody-2 moves to the quality control area (C line) and combines with the coated goat anti-mouse IgG polyclonal antibody to form a red band. Negative samples will not have red bands in the test area (T line), but only in the quality control area (C line). Regardless of whether the sample contains HAV virus antigen, a red band will be formed in the quality control area (C line) as a standard for judging whether the chromatography process is normal.

[0054] (II) Testing process: Allow stool samples to return to 15°C to 30°C before testing.

[0055] 1. Sample preparation (1) Unscrew the tube cover 2 of the sampling device 100 and take out the sampling rod 3 to prepare to pick up the sample 500.

[0056] (2) Use the sampling rod 3 to pick stool samples from at least 4 different locations, taking about 125 mg of sample (about the size of a peanut), and then insert the sample into the sampling device containing the processing liquid 400.

[0057] (3) Tighten the tube cover 2 of the sampling device.

[0058] (4) Shake or stir thoroughly to mix the sample and sample processing solution thoroughly.

[0059] 2. Detection (1) Take out the test kit 300, which contains the hepatitis A antigen test strip 200 prepared in step (I), and place the test kit 300 on a clean and flat table. Keep the sampling device 100 with the tube opening facing upward, unscrew the tube cap 2 at the top of the sampling device, and then turn the sampling device upside down. Fig.14 As shown, gently squeeze the sampling device and vertically drip 3 drops of bubble-free sample solution into the reagent sample adding area of ​​the hepatitis A antigen detection test strip 200 of the reagent kit 300.

[0060] (2) Wait for the red strip to appear and read the test result in 15 to 20 minutes.

[0061] The use of the sampling device 100 described in the present application to collect stool samples can prevent the tester's hands from directly contacting the stool samples. At the same time, when sampling, the shielding component 4 can reduce the discomfort caused by directly looking at the stool. The use of the sampling device described in the present application to collect samples and conduct subsequent tests has no negative impact on the test results, and the test results are accurate.

Claims

1. A sampling device, comprising a tube body, a tube cover arranged on the top of the tube body and a sampling rod inserted into the tube body, characterized in that: The sampling rod is fixedly connected to the tube cover and the top end of the sampling rod extends from the tube body to the outside of the tube cover, and a chamber is provided inside the sampling rod along its axial direction, which passes through the upper and lower parts; a shielding assembly is provided on the sampling rod, and the shielding assembly includes a fixing plate coaxially arranged on the side wall of the sampling rod, the outer diameter of the fixing plate is smaller than the inner diameter of the tube body, and a plurality of baffles adjacent to each other and connected to be flipped upward are provided around the outer circumference of the fixing plate, the plurality of baffles are fan-shaped with narrow inside and wide outside and are radially distributed with the fixing plate as the center, and a support plate is also provided on the fixing plate to prevent the baffles from flipping and drooping to the bottom of the fixing plate, when the baffles are flipped upward, adjacent baffles are folded with each other to facilitate the insertion of the sampling rod into the tube body; when the sampling rod is taken out of the tube body, the plurality of baffles automatically flip downward under the action of gravity and then unfold to form a disc roughly in the same plane as the fixing plate, and when observed from the tube cover along the axial direction of the sampling rod, the unfolded shielding assembly forms a disc-shaped barrier that blocks the line of sight.

2. The sampling device according to claim 1, characterized in that: The multiple baffles are arranged side by side and shoulder to shoulder, and the gap between adjacent baffles is less than 0.3 mm.

3. The sampling device according to claim 1, characterized in that: The plurality of baffles are sequentially arranged in two rows with intervals up and down, and the side portions of two adjacent baffles are stacked up and down to form a complete disc-shaped visual barrier.

4. The sampling device according to claim 2 or 3, characterized in that: The cross-sectional shape formed by the multiple baffles is configured such that the inner circle is a regular polygon matched with the outer circle of the fixing plate, and the outer circle is a circle.

5. The sampling device according to claim 4, characterized in that: Each outer side of the fixed plate is provided with a concave rotation groove, and one end of the baffle close to the fixed plate is provided with a linkage plate adapted to the rotation groove, the linkage plate extends into the rotation groove and is rotatably connected thereto through a rotating shaft.

6. The sampling device according to claim 5, characterized in that: One end of the support plate is fixedly connected to the bottom of the rotating groove, and the other end thereof horizontally extends to the bottom of the linkage plate.

7. The sampling device according to claim 1, characterized in that: A plurality of liquid inlet holes connected with the chamber are arranged on one end of the side wall of the sampling rod close to the tube cover.

8. The sampling device according to claim 1, characterized in that: A plurality of stirring plates are symmetrically arranged at the bottom of the fixed plate with the center of the fixed plate as the center.

9. The sampling device according to claim 1, characterized in that: The fixing plate and the blocking sheet are configured to be translucent.

10. The sampling device according to claim 1, characterized in that: The fixing plate and the linkage plate are made of hard plastic, and the blocking plate is made of soft plastic.

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