Rapid detection sampling device for theaflavin content in black tea preparation

Abstract

The invention relates to the technical field of sampling devices, and discloses a rapid detection sampling device for theaflavin content in black tea preparation, which comprises a sample storage tank for storing a black tea solution to be detected; the sampling part is used for sampling the black tea solution, and the sampling part is arranged in the sample storage tank; wherein the sampling part comprises a sampling frame and three movable arc plates, the sampling frame comprises a transverse frame and a vertical rod, the vertical rod is fixedly connected in the transverse frame, the three movable arc plates are distributed along the vertical rod in an array mode, and through holes sliding relative to the vertical rod are formed in the tops of the movable arc plates. The rapid detection sampling device for the theaflavin content in the black tea preparation can effectively solve the problems that in the prior art, a sampling device carries out multiple sampling on different layers of a black tea solution, the black tea solution is respectively put into different sampling bottles, multiple sampling needs to consume more manpower and time, the working efficiency is reduced, and the detection cost is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and particularly to a rapid detection sampling device for the theaflavin content in black tea preparation. Background Art

[0002] Theaflavin is an orange-red pigment formed during the fermentation of black tea. It has a benzopyranone structure and is an important indicator for measuring the quality of black tea. The standardization and standardization of its detection sampling technology are crucial for the healthy development of the industry.

[0003] During sampling, the operator needs to mix black tea leaves with an appropriate amount of hot water in a certain proportion, and then filter to obtain a clear black tea solution. The treated sampling device is used to take multiple samples from different layers of the black tea solution and place them in different sampling bottles respectively. Multiple samplings require more manpower and time, reducing work efficiency and increasing detection costs. Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a rapid detection sampling device for the theaflavin content in black tea preparation, which can effectively solve the problem in the prior art that when the sampling device takes multiple samples from different layers of the black tea solution and places them in different sampling bottles respectively, multiple samplings require more manpower and time, reducing work efficiency and increasing detection costs.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] The present invention provides a rapid detection sampling device for the theaflavin content in black tea preparation, comprising:

[0008] A sample storage tank for storing the black tea solution to be detected;

[0009] A sampling part for sampling the black tea solution, and the sampling part is arranged in the sample storage tank;

[0010] Among them, the sampling part includes a sampling rack and a movable arc plate. The sampling rack includes a horizontal rack and a vertical rod. The vertical rod is fixedly connected inside the horizontal rack. There are three movable arc plates which are arranged in an array along the vertical rod. A through hole for sliding with the vertical rod is opened at the top of the movable arc plate, and a limiting member for adjusting the position of the movable arc plate is arranged in the through hole. A limiting mechanism for clamping the sampling bottle is arranged on the inner wall of the movable arc plate. A guide pipe communicating with the sampling bottle is fixedly connected inside the movable arc plate;

[0011] Among them, a sampling pipe for sampling is arranged on the outer circumferential surface of the movable arc plate.

[0012] The limiting member includes a pin, which is fixedly connected to the inner wall of one side of the through hole. The size of the through hole is larger than the diameter of the vertical rod. The inner wall of the other side of the through hole is connected to the vertical rod through a circular wire spring. A clamping groove that fits the outer surface of the pin is formed on the outer surface of the circumference of the vertical rod near the movable arc plate, and a plurality of such clamping grooves are provided and distributed in an array along the vertical rod.

[0013] The limiting mechanism includes a placement rack, which is fixedly connected to the inner wall of the movable arc plate. The movable arc plate is slidably installed with a movable rod through a slot formed in its inner wall, and an abutting arc plate that fits the sampling bottle is fixedly connected to the end of the movable rod. A return spring is sleeved on the outer surface of the circumference of the movable rod.

[0014] The sampling tube includes a material taking tube and a sleeve. The material taking tube is detachably installed on the outer surface of the circumference of the movable arc plate. The material taking tube is communicated with the material guiding tube. A plurality of sliding grooves are formed on the outer surface of the circumference of the material taking tube and are distributed in an array along the circumference of the material taking tube. A plurality of feeding holes are formed on the outer surface of the circumference of the material taking tube and are distributed in an array along the circumference of the material taking tube. A filter screen for isolating tea residues is fixedly connected in the feeding holes.

[0015] A slider that slides with the sliding groove is fixedly connected to the inner wall of the sleeve, and the slider is connected to the inner wall of the sliding groove through a compression spring provided on its surface. A wedge block is fixedly connected to one end of the sleeve away from the movable arc plate. A plurality of openings are formed on the outer surface of the circumference of the sleeve and are distributed in an array along the circumference of the sleeve.

[0016] An installation groove is formed on the outer surface of the circumference of the material taking tube, and a baffle that fits the opening is slidably connected in the installation groove. Both sides of the baffle are designed as inclined surfaces, and the baffle is connected to the installation groove through an elastic member provided on its inner wall.

[0017] A limiting frame is slidably connected to the outer surface of the circumference of the vertical rod away from the movable arc plate, and the limiting frame is fixedly connected to the outer surface of the circumference of the lower movable arc plate on the side close to the material taking tube.

[0018] A movable plate is slidably connected to the outer surface of the circumference of the vertical rod away from the movable arc plate. An abutting plate that fits the inclined surface of the wedge block is fixedly connected to the top of the movable plate. Two hollow spheres are detachably installed on the top of the movable plate and are symmetrically distributed left and right along the abutting plate. An electromagnetic block is fixedly connected to the movable plate through a support plate provided at its bottom, and a magnetic connection is established between the electromagnetic block and the top of the limiting frame.

[0019] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0020] The present invention is provided with a sampling part, which can complete multi-layer sampling at one time. By utilizing the buoyancy generated by the hollow sphere in the black tea solution, three sampling tubes are sequentially opened to complete the sampling of the upper layer, middle layer and lower layer of the black tea solution at one time. And it can open the sampling tubes in sequence from deep to shallow according to the preset order to achieve continuous sampling of different layers. Since the movement of the hollow sphere is continuous and relatively stable, the transition between the corresponding layers when adjacent sampling tubes are opened is relatively natural, which can clearly divide different layers, avoid excessive mixing between different layers, enable each sample to accurately represent the specific layer where it is located, and improve the accuracy of stratified sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0022] Figure 1 Schematic three-dimensional structure diagram of an embodiment of the present invention;

[0023] Figure 2 Schematic three-dimensional structure diagram of the sampling part of an embodiment of the present invention;

[0024] Figure 3 Schematic separated three-dimensional structure diagram of the limiting mechanism and the material taking tube of an embodiment of the present invention;

[0025] Figure 4 Schematic separated three-dimensional structure diagram of the limiting frame, the movable plate and the movable arc plate of an embodiment of the present invention;

[0026] Figure 5 Schematic cross-sectional structure diagram of the material taking tube of an embodiment of the present invention;

[0027] Figure 6 Schematic cross-sectional structure diagram of the sleeve of an embodiment of the present invention;

[0028] Figure 7 Schematic cross-sectional structure diagram of the sampling rack of an embodiment of the present invention;

[0029] Figure 8 For an embodiment of the present invention Figure 7 Enlarged schematic diagram of the structure at A in

[0030] Figure 9 Schematic diagram of the three-dimensional state transformation of the sampling tube of an embodiment of the present invention.

[0031] The reference numerals in the figure respectively represent: 1, sample storage tank; 2, sampling part; 21, sampling rack; 211, horizontal rack; 212, vertical rod; 22, movable arc plate; 23, through hole; 24, limiting part; 241, clamping pin; 242, clamping groove; 25, limiting mechanism; 251, placement rack; 252, movable rod; 253, abutting arc plate; 254, return spring; 26, feeding pipe; 27, sampling pipe; 271, material taking pipe; 2711, sliding groove; 2712, feeding hole; 2713, filter screen; 2714, installation groove; 2715, baffle plate; 272, sleeve; 2721, slider; 2722, wedge block; 2723, opening; 28, limiting rack; 29, movable plate; 291, abutting plate; 292, hollow sphere; 293, electromagnetic block. Detailed implementation mode

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] Embodiment:

[0035] Please refer to Figures 1 - 9 , the present invention provides a technical solution: a rapid detection and sampling device for the theaflavin content in black tea preparation, including:

[0036] A sample storage tank 1 for storing the black tea solution to be detected;

[0037] A sampling part 2 for sampling the black tea solution, and the sampling part 2 is arranged in the sample storage tank 1;

[0038] Among them, the sampling part 2 includes a sampling rack 21 and a movable arc plate 22. The sampling rack 21 includes a horizontal rack 211 and a vertical rod 212. The vertical rod 212 is fixedly connected in the horizontal rack 211. There are three movable arc plates 22 and they are arranged in an array along the vertical rod 212. A through hole 23 that slides with the vertical rod 212 is opened at the top of the movable arc plate 22, and a limiting part 24 for adjusting the position of the movable arc plate 22 is arranged in the through hole 23. A limiting mechanism 25 for clamping the sampling bottle is arranged on the inner wall of the movable arc plate 22, and a feeding pipe 26 communicating with the sampling bottle is fixedly connected inside the movable arc plate 22;

[0039] Among them, a sampling pipe 27 for sampling is arranged on the outer circumferential surface of the movable arc plate 22.

[0040] The limiting member 24 includes a pin 241. The pin 241 is fixedly connected to the inner wall of one side of the through hole 23. The size of the through hole 23 is larger than the diameter of the vertical rod 212. The inner wall of the other side of the through hole 23 is connected to the vertical rod 212 through a circular wire spring. A slot 242 that fits the outer surface of the pin 241 is provided on the outer surface of the circumference of the vertical rod 212 near the movable arc plate 22, and a plurality of such slots 242 are provided and are arranged in an array along the vertical rod 212.

[0041] The limiting mechanism 25 includes a placement rack 251. The placement rack 251 is fixedly connected to the inner wall of the movable arc plate 22. The movable arc plate 22 is slidably installed with a movable rod 252 through a slot provided in its inner wall, and an abutting arc plate 253 that fits the sampling bottle is fixedly connected to the end of the movable rod 252. A return spring 254 is sleeved on the outer surface of the circumference of the movable rod 252.

[0042] The sampling tube 27 includes a material taking tube 271 and a sleeve 272. The material taking tube 271 is detachably installed on the outer surface of the circumference of the movable arc plate 22. The material taking tube 271 is communicated with the material guiding tube 26. A sliding groove 2711 is provided on the outer surface of the circumference of the material taking tube 271, and a plurality of such sliding grooves 2711 are provided and are arranged in an array along the circumference of the material taking tube 271. A feeding hole 2712 is provided on the outer surface of the circumference of the material taking tube 271, and a plurality of such feeding holes 2712 are provided and are arranged in an array along the circumference of the material taking tube 271. A filter screen 2713 for isolating tea residues is fixedly connected in the feeding hole 2712.

[0043] A slider 2721 that slides with the sliding groove 2711 is fixedly connected to the inner wall of the sleeve 272, and the slider 2721 is connected to the inner wall of the sliding groove 2711 through a compression spring provided on its surface. A wedge block 2722 is fixedly connected to one end of the sleeve 272 away from the movable arc plate 22. An opening 2723 is provided on the outer surface of the circumference of the sleeve 272, and a plurality of such openings 2723 are provided and are arranged in an array along the circumference of the sleeve 272.

[0044] An installation groove 2714 is provided on the outer surface of the circumference of the material taking tube 271, and a baffle 2715 that fits the opening 2723 is slidably connected in the installation groove 2714. Both sides of the baffle 2715 are designed with inclined surfaces. The baffle 2715 is connected to the installation groove 2714 through an elastic member provided in its inner wall.

[0045] A limiting frame 28 is slidably connected to the outer surface of the circumference of the vertical rod 212 away from the movable arc plate 22, and the limiting frame 28 is fixedly connected to the outer surface of the circumference of the lower movable arc plate 22 on one side close to the material taking tube 271.

[0046] A movable plate 29 is slidably connected to the circumferential outer surface of the vertical rod 212 away from the movable arc plate 22. A contact plate 291 that fits against the inclined surface of the wedge block 2722 is fixedly connected to the top of the movable plate 29. Two hollow spheres 292 are detachably installed at the top of the movable plate 29 and are symmetrically distributed left and right along the contact plate 291. The movable plate 29 is fixedly connected to an electromagnetic block 293 through a support plate provided at its bottom, and the electromagnetic block 293 is magnetically connected to the top of the limit frame 28.

[0047] The principle and advantages of the rapid detection sampling device for the theaflavin content in black tea preparation:

[0048] During actual use, the staff can push the movable arc plate 22 to move the movable arc plate 22 away from the side of the pin 241 (the size of the through hole 23 is larger than the diameter of the vertical rod 212, enabling the vertical rod 212 to move within the through hole 23), compressing the round wire spring. When the pin 241 disengages from the card slot 242 on the vertical rod 212, the limit between the movable arc plate 22 and the vertical rod 212 disappears. Then, the staff can move the movable arc plate 22 along the direction of the vertical rod 212. When the movable arc plate 22 moves to the desired position and the movable arc plate 22 is released, with the cooperation of the round wire spring, the movable arc plate 22 will return to its initial position, and the pin 241 will re-engage in the corresponding card slot 242, thus completing the limit fixation of the movable arc plate 22.

[0049] After the position adjustment of the movable arc plate 22 is completed, the staff pulls the movable rod 252 inside the movable arc plate 22 and places the sampling bottle on the placement rack 251. At this time, when the movable rod 252 is released, the return spring 254 will tightly fit the contact arc plate 253 against the circumferential outer surface of the sampling bottle, thus completing the installation of the sampling bottle. Then, the staff connects the sampling bottle and the guide pipe 26 to each other. After the above operations are completed, the staff places the sampling rack 21 in the storage tank.

[0050] It should be noted that there are three movable arc plates 22. The staff can use the pin 241 in cooperation with the card slot 242 to limit and fix the movable arc plate 22, thereby adjusting the position of the sampling pipe 27 on each movable arc plate 22. The positions between the sampling pipes 27 can be adjusted so that when the sampling part 2 is sampling the black tea solution at different depths in the storage tank 1, it can separately sample different positions in the upper, middle, and lower layers of the black tea solution at one time, simplifying the sampling steps. A rubber stopper or silica gel stopper matching the mouth of the sampling bottle and the outer diameter of the guide pipe 26 is used between the sampling bottle and the guide pipe 26. The guide pipe 26 is inserted into the hole pre-drilled in the stopper to ensure an interference fit, and then the stopper is tightly plugged into the sampling bottle to achieve a tight connection between the two.

[0051] When the sampling rack 21 just comes into contact with the black tea solution in the sample storage tank 1, the hollow sphere 292 has not yet come into contact with the black tea solution. As the sampling rack 21 continues to move into the black tea solution, at this time the hollow sphere 292 will come into contact with the black tea solution and thus receive an upward buoyant force. When the hollow sphere 292 is completely immersed in the black tea solution, the buoyant force on the hollow sphere 292 is the largest at this time. However, the electromagnet 293 in the limit frame 28 generates an adsorption force on the movable plate 29, and the buoyant force on the hollow sphere 292 cannot overcome the adsorption force generated by the electromagnet 293. Therefore, the movable plate 29 will remain on the vertical rod 212. When the bottom of the sampling rack 21 fits against the sample storage tank 1, at this time the electromagnet 293 stops working. Under the action of the buoyant force, the hollow sphere 292 will drive the movable plate 29 to move along the vertical rod 212.

[0052] When the inclined surface on the abutting plate 291 comes into contact with the inclined surface of the wedge block 2722, the vertical movement of the abutting plate 291 will transmit force to the wedge block 2722 through the contact between the inclined surfaces. Then the wedge block 2722 will drive the sleeve 272 to move along the direction of the material taking pipe 271, and the compression spring will be compressed. When there is a relative displacement between the sleeve 272 and the material taking pipe 271, the feed hole 2712 on the material taking pipe 271 and the opening 2723 on the sleeve 272 will form a "channel", and the solution of the corresponding layer in the black tea solution will enter the guide pipe 26 through this "channel", and then enter the sampling bottle along the guide pipe 26 for collection.

[0053] When the hollow sphere 292 drives the abutting plate 291 to separate from the wedge block 2722, at this time the compression spring will reset the sleeve 272. Then the inner wall of the sleeve 272 will block the feed hole 2712, so that the "channel" is closed, and other black tea solutions will not enter the sampling bottle. When the sleeve 272 is reset, since the inner wall of the sleeve 272 fits against the outer circumferential surface of the material taking pipe 271, the side wall of the opening 2723 will scrape off the residues attached to the filter screen 2713, preventing the tea leaf residues from blocking the filter screen 2713 and affecting normal use next time. Since the opening 2723 and the feed hole 2712 are circumferentially arrayed along the material taking pipe 271, tea leaf residues will adhere to the openings 2723 at other angles. At this time, as the sleeve 272 moves, the baffle 2715 in the material taking pipe 271 will be squeezed into the installation groove 2714 by the inner wall of the sleeve 272. When the positions of the opening 2723 and the baffle 2715 are opposite, the elastic member will push the baffle 2715 into the opening 2723, thus discharging the remaining tea leaf residues in the opening 2723 for convenient use next time.

[0054] When the hollow sphere 292 drives the abutting plate 291 to move to the position of the uppermost layer movable arc plate 22, sampling has been completed at the upper, middle and lower layers. At this time, the staff takes out the sampling rack 21 from the sample storage tank 1, takes out the corresponding sampling bottle, and makes marks.

[0055] It should be noted that the inclined plane angle between the abutting plate 291 and the wedge block 2722 is greater than 45 degrees. A larger inclined plane angle can enable a larger displacement of the other inclined plane under the same moving distance. When a rapid displacement change is required, the large-angle inclined plane can complete the required movement in a shorter time, that is, the "channel" between the sleeve 272 and the material extraction pipe 271 can be quickly opened, and the compression spring drives the sleeve 272 to reset, which can quickly close the "channel", ensuring that each sampling will not be excessive and avoiding sample waste during subsequent detection and analysis.

[0056] The sampling part 2 adopted by the present invention has the following several advantages:

[0057] Advantage 1: When the sleeve 272 resets, the inner wall thereof can scrape off the residues attached to the filter net 2713, effectively avoiding the blockage of the filter net 2713 by tea filter residues, eliminating the need for frequent manual cleaning, ensuring the normal filtering function of the filter net, and facilitating the subsequent smooth sampling. The design of the baffle 2715 and the elastic member in the material extraction pipe 271 can discharge the residual tea residues in the opening 2723 during the movement of the sleeve 272, further ensuring the cleanliness of the opening 2723 and the filter net, and reducing the normal use of the sampling device due to blockage problems.

[0058] Advantage 2: There are three sampling pipes 27. By cooperating with the buoyancy generated by the hollow sphere 292 and the black tea solution, only by utilizing the position change of the hollow sphere 292 in the black tea solution due to buoyancy, the three sampling pipes 27 can be automatically opened one by one without additional complex operations, reducing the operation difficulty and improving the sampling efficiency. Compared with the traditional layered sampling steps, no other auxiliary tools are required, simplifying the sampling steps.

[0059] Advantage 3: Multi-layer sampling can be completed at one time. By utilizing the buoyancy generated by the hollow sphere 292 in the black tea solution, the three sampling pipes 27 are sequentially opened to complete the sampling of the upper layer, middle layer, and lower layer of the black tea solution at one time. And it can open the sampling pipes 27 in sequence from deep to shallow according to the preset order to achieve continuous sampling of different layers. Since the movement of the hollow sphere 292 is continuous and relatively stable, the transition between the corresponding layers when adjacent sampling pipes 27 are opened is relatively natural, which can clearly divide different layers, avoiding excessive mixing between different layers, enabling each sample to accurately represent its specific layer, and improving the accuracy of layered sampling.

[0060] Advantage 4: By adjusting the position of the sampling tube 27, the sampling tube 27 can be flexibly adjusted to a suitable height according to the actual solution depth in the sample storage tank 1, ensuring that samples at different depths can be obtained without being restricted by the change of the solution depth. Moreover, the adjustable sampling tube 27 can focus on sampling specific depth regions of the black tea solution, facilitating the staff to adjust the sampling position targeted according to specific requirements and meeting diverse sampling requirements.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid detection sampling device for the theaflavin content in black tea preparation, characterized in that, Comprising: A sample storage tank (1) for storing the black tea solution to be detected; A sampling part (2) for sampling the black tea solution, and the sampling part (2) is arranged in the sample storage tank (1); Among them, the sampling part (2) includes a sampling frame (21) and a movable arc plate (22). The sampling frame (21) includes a horizontal frame (211) and a vertical rod (212). The vertical rod (212) is fixedly connected inside the horizontal frame (211). There are three movable arc plates (22) which are arranged in an array along the vertical rod (212). A through hole (23) that slides with the vertical rod (212) is opened at the top of the movable arc plate (22), and a limiting part (24) for adjusting the position of the movable arc plate (22) is arranged in the through hole (23). A limiting mechanism (25) for clamping the sampling bottle is arranged on the inner wall of the movable arc plate (22), and a guide pipe (26) connected to the sampling bottle is fixedly connected inside the movable arc plate (22); Among them, a sampling pipe (27) for sampling is arranged on the outer circumferential surface of the movable arc plate (22).

2. The rapid detection sampling device for the theaflavin content in black tea preparation according to claim 1, characterized in that: The limiting part (24) includes a pin (241). The pin (241) is fixedly connected to the inner wall of one side of the through hole (23). The size of the through hole (23) is larger than the diameter of the vertical rod (212). The inner wall of the other side of the through hole (23) is connected to the vertical rod (212) through a circular wire spring. A clamping groove (242) that fits with the outer circumferential surface of the pin (241) is opened on the outer circumferential surface of the vertical rod (212) close to the movable arc plate (22), and there are multiple such clamping grooves (242) which are arranged in an array along the vertical rod (212).

3. The rapid detection sampling device for the theaflavin content in black tea preparation according to claim 1, wherein: The limiting mechanism (25) includes a placement rack (251). The placement rack (251) is fixedly connected to the inner wall of the movable arc plate (22). A movable rod (252) is slidably installed on the movable arc plate (22) through a slot arranged on its inner wall, and an abutting arc plate (253) that fits with the sampling bottle is fixedly connected to the end of the movable rod (252). A return spring (254) is sleeved on the outer circumferential surface of the movable rod (252).

4. The rapid detection sampling device for the theaflavin content in black tea preparation according to claim 1, wherein: The sampling pipe (27) includes a material taking pipe (271) and a sleeve (272). The material taking pipe (271) is detachably installed on the outer circumferential surface of the movable arc plate (22). The material taking pipe (271) is communicated with the guide pipe (26). A sliding groove (2711) is opened on the outer circumferential surface of the material taking pipe (271), and there are multiple such sliding grooves (2711) which are arranged in an array along the circumferential direction of the material taking pipe (271). A feeding hole (2712) is opened on the outer circumferential surface of the material taking pipe (271), and there are multiple such feeding holes (2712) which are arranged in an array along the circumferential direction of the material taking pipe (271). A filter screen (2713) for isolating tea residues is fixedly connected in the feeding hole (2712).

5. The rapid detection sampling device for the theaflavin content in black tea preparation according to claim 4, wherein: A slider (2721) that is fixedly connected to the inner wall of the sleeve (272) and slides in the chute (2711) is provided. The slider (2721) is connected to the inner wall of the chute (2711) through a compression spring provided on its surface. One end of the sleeve (272) away from the movable arc plate (22) is fixedly connected with a wedge block (2722). A plurality of openings (2723) are formed on the circumferential outer surface of the sleeve (272), and the openings (2723) are arranged in a circumferential array along the sleeve (272).

6. The rapid detection sampling device for the theaflavin content in black tea preparation according to claim 4, wherein: An installation groove (2714) is formed on the circumferential outer surface of the material taking pipe (271), and a baffle (2715) that is in sliding connection with the installation groove (2714) and fits the opening (2723) is provided. Both sides of the baffle (2715) are designed as inclined planes. The baffle (2715) is connected to the installation groove (2714) through an elastic member provided on its inner wall.

7. A rapid detection sampling device for the theaflavin content in black tea preparation according to claim 1, characterized in that: A limiting frame (28) is slidably connected to the circumferential outer surface of the vertical rod (212) away from the movable arc plate (22), and one side of the limiting frame (28) close to the material taking pipe (271) is fixedly connected to the circumferential outer surface of the lower movable arc plate (22).

8. A rapid detection sampling device for the theaflavin content in black tea preparation according to claim 1, characterized in that: A movable plate (29) is slidably connected to the circumferential outer surface of the vertical rod (212) away from the movable arc plate (22). A contact plate (291) that fits the inclined plane of the wedge block (2722) is fixedly connected to the top of the movable plate (29). Two hollow spheres (292) are detachably installed at the top of the movable plate (29), and the hollow spheres (292) are symmetrically distributed left and right along the contact plate (291). The movable plate (29) is fixedly connected with an electromagnetic block (293) through a support plate provided at its bottom, and a magnetic connection is formed between the electromagnetic block (293) and the top of the limiting frame (28).

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