Sampling device for food detection sample

Abstract

The invention relates to the technical field of food sampling, in particular to a food detection sample sampling device which comprises a mounting seat, a mounting frame, a charging barrel, a lifting shell, a sealing plate, a water guide barrel and a collecting barrel. According to the sampling device for the food detection sample, when the water guide barrel rotates to the position of the linkage plate along with the inner disc, the lifting part slides from the bottom end to the top end along the arc-shaped surface of the linkage plate to drive the lifting plate to synchronously move upwards in the water guide barrel, so that stable negative pressure is formed in the water guide barrel, and liquid in the material barrel can be actively adsorbed to quickly flow into the collecting barrel through negative pressure material taking; the material taking time is shortened, the overall sampling efficiency is improved, the time cost is reduced, meanwhile, driving force formed by negative pressure is not affected by factors such as liquid viscosity and surface tension, and the problem that the flow speed is uneven during natural drainage can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of food sampling technology, and more specifically to a sampling device for food testing samples. Background Technology

[0002] Food testing samplers are specialized tools used to collect representative samples from a batch of food. Their core function is to ensure the sterility and representativeness of the samples. For liquid foods (such as milk, beverages, and oils), barrel-type sampling tubes with adjustable depth are often used to extract samples from different liquid layers, avoiding deviations caused by sedimentation or stratification. These tools and methods ensure that the sampling process is sterile and accurate, laying a solid foundation for the authenticity of subsequent microbiological and physicochemical test results.

[0003] In practical applications, most existing liquid sampling devices employ natural flow sampling. Natural flow sampling relies primarily on the liquid's own gravity to allow it to flow naturally from the container, completing the sampling process. While this method is relatively simple to operate, it is extremely slow in terms of sampling efficiency. Because it is entirely driven by gravity, the outflow speed is limited by many factors. When sampling large quantities, a significant amount of time is often required to wait for the liquid to flow out naturally. This not only prolongs the entire sampling process and reduces work efficiency but may also affect the timeliness of the sample due to the long waiting time, resulting in the sample not accurately reflecting the actual situation. Furthermore, the flow process is affected by the physical properties of the liquid: when the liquid viscosity is too high, the flow resistance increases, leading to slow or even interrupted flow; when the liquid surface tension is high, bubbles or liquid bridges are easily formed in the flow channel, further hindering flow stability.

[0004] Therefore, the present invention provides a sampling device for food testing samples to solve the above-mentioned problems. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a sampling device for food testing samples, which solves the problem that the existing liquid sampling devices mostly adopt natural drainage sampling, which has low sampling efficiency, long time consumption, and the drainage flow rate is easily affected by factors such as liquid viscosity and surface tension, resulting in uneven flow rate.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A sampling device for food testing samples includes a mounting base and a mounting frame, wherein the mounting frame is mounted on top of the mounting base, and a material cylinder is mounted on the mounting base, and the liquid to be tested can be stored inside the material cylinder. The mounting frame is equipped with a material handling device, which includes a lifting shell. The lifting shell is annular and has a concave cavity facing downwards. A sealing plate is provided at the bottom of the lifting shell. The outer wall of the sealing plate is rotatably connected to the inner wall of the lifting shell. The sealing plate can rotate around its axis inside the lifting shell. Three water-guiding cylinders are arranged at equal intervals on the sealing plate in a ring. The water-guiding cylinders have an inner cavity that runs vertically through the lifting shell. A water-guiding hole is opened on the water-guiding cylinder away from the center of the lifting shell. A collecting cylinder is provided at the bottom of the water-guiding cylinder and is coaxially arranged with the water-guiding cylinder to store the liquid flowing into the water-guiding cylinder.

[0007] Preferably, an inner plate is provided between the inner top wall of the lowering shell and the sealing plate. The inner plate is coaxially arranged with the lowering shell and the sealing plate, and the outer wall of the inner plate is rotatably connected to the inner wall of the lowering shell. A limit hole is provided on the inner plate, and the outer wall of the water inlet tube is fixed on the inner wall of the corresponding limit hole.

[0008] Preferably, the top of the collecting cylinder has a threaded section, and the bottom of the water-drawing cylinder has a threaded groove that matches the threaded section. The threaded section of the collecting cylinder is threadedly connected to the inside of the threaded groove of the water-drawing cylinder. The collecting cylinder can be disassembled and installed on the water-drawing cylinder through the cooperation of the threaded section and the threaded groove. The bottom of the sealing plate has an installation hole that matches the collecting cylinder. The installation hole is coaxially arranged with the collecting cylinder, and the outer wall of the collecting cylinder is rotatably connected to the inner wall of the installation hole. The installation hole is used to limit the position of the collecting cylinder to maintain the stability of the collecting cylinder.

[0009] Preferably, a lifting plate is slidably connected inside the water intake cylinder, and the lifting plate is coaxially arranged with the water intake cylinder. The outer wall of the lifting plate is attached to the inner wall of the water intake cylinder. A T-shaped lifting component is fixed to the top of the lifting plate. A slide rail is fixed to the inner wall of the lifting shell through a support arm. The slide rail is annular and has an inner cavity. The lifting component is slidably connected inside the inner cavity of the slide rail. A linkage plate is fixed to the top of the slide rail. A water inlet is opened on the outer wall of the lifting shell.

[0010] Preferably, a blocking ring is provided on the outside of the lifting shell, and the blocking ring is coaxially arranged with the lifting shell. The inner wall of the blocking ring abuts against the outer wall of the lifting shell to control the opening and closing state of the water inlet. A limit slider is fixed on the inner wall of the blocking ring, and a limit groove adapted to the limit slider is provided on the outer wall of the lifting shell. The limit slider is slidably connected inside the limit groove.

[0011] Preferably, the water inlet cylinder is equipped with a filter assembly, which includes an outer ring fixed to the inner wall of the water inlet hole. A hollow filter screen is installed on the inner wall of the outer ring for filtering the liquid flowing into the water inlet hole. A rotating shaft is rotatably connected to the inner wall of the central hole of the filter screen, and the rotating shaft is coaxial with the filter screen. A cleaning plate is fixed to the outer wall of one end of the rotating shaft. When the rotating shaft rotates, the rotating shaft drives the cleaning plate to clean the surface of the filter screen, thereby maintaining the filtration performance of the filter screen.

[0012] Preferably, the inner wall of the water-drawing cylinder is fixed with a sleeve, and the sleeve is coaxially arranged with the rotating shaft. The end of the rotating shaft facing the sleeve is rotatably connected to one side wall of the sleeve. The outer wall of the rotating shaft is slidably connected with an outer sliding sleeve, and the outer sliding sleeve is coaxially arranged with the sleeve. The outer wall of the rotating shaft is fixed with a first linkage block. The inner wall of the outer sliding sleeve is provided with a first spiral groove that matches the first linkage block, and the first linkage block is slidably connected inside the first spiral groove.

[0013] Preferably, a connecting post is fixed at one end of the outer sliding sleeve facing the sleeve, and a groove adapted to the connecting post is opened on the side of the sleeve facing the outer sliding sleeve. The connecting post is slidably connected inside the groove. The connecting post and the groove are used to limit the outer sliding sleeve to maintain the stability of the outer sliding sleeve.

[0014] Preferably, the bottom of the lifting plate is fixed with a base plate, the outer wall of the outer sliding sleeve is fixed with a side shaft, the base plate is provided with a slide rail adapted to the side shaft, and the side shaft is slidably connected inside the slide rail.

[0015] Preferably, the drive assembly includes a top shaft fixed to the top of the inner disk, a through hole on the lifting housing coaxial with the top shaft, the outer wall of the top shaft being rotatably connected to the inner wall of the through hole, a connecting cylinder on the outside of the top shaft, the top of the connecting cylinder being fixed to the inner top wall of the mounting frame, a second linkage block fixed to the outer wall of the top shaft, a second spiral groove on the inner wall of the connecting cylinder, the second linkage block being slidably connected inside the second spiral groove, a lifting ring plate slidably connected to the outside of the connecting cylinder, a support shaft fixed between the bottom of the lifting ring plate and the top of the lifting housing, an end plate fixed to the outer wall of the lifting ring plate, a hydraulic rod mounted on the mounting frame, and the piston rod end of the hydraulic rod being connected to the top of the end plate.

[0016] The beneficial effects of this invention are as follows: 1. The core lifting shell of this material handling device adopts a compact ring structure design, which is small in size. This not only reduces its space occupation and fluid disturbance in the material cylinder, but also allows it to flexibly enter containers of different sizes, so as to achieve precise material handling in narrow spaces.

[0017] 2. By adopting a structural design that uses multiple water inlet cylinders working alternately and linked with the lifting shell, precise stratified sampling of liquid at different heights within the cylinder is achieved. The drive component rotates the inner disc, which, in conjunction with the steady downward movement of the lifting shell, causes the three water inlet cylinders to open and close alternately in sequence. Each water inlet cylinder corresponds to a liquid level at a certain height, achieving comprehensive sampling from the upper, middle, and lower layers. At the same time, the water inlet cylinders are arranged in a ring at equal intervals, and the coaxial rotation design of the sealing plate and the inner disc ensures the standardization of the sampling position and avoids errors caused by sampling deviation.

[0018] 3. When the water inlet tube rotates with the inner plate to the position of the linkage plate, the lifting component slides from the bottom to the top along the arc surface of the linkage plate, driving the lifting plate to move upward synchronously inside the water inlet tube, so that a stable negative pressure is formed inside the water inlet tube. The negative pressure can actively adsorb the liquid in the material tube and quickly flow into the collection tube, shortening the material collection time, improving the overall sampling efficiency, and reducing time costs. At the same time, the driving force formed by the negative pressure is not affected by factors such as liquid viscosity and surface tension, which can effectively avoid the problem of uneven flow rate during natural drainage.

[0019] 4. A hollow filter screen is installed at the water inlet to intercept contaminants and prevent them from entering the water inlet and collection cylinders, thus avoiding interference from impurities in the detection and ensuring the purity of the sample. At the same time, the slide rail of the base plate drives the side shaft to move, which in turn drives the outer sliding sleeve to slide. With the cooperation of the first linkage block and the first spiral groove, the rotating shaft is driven to rotate, realizing the automatic cleaning of the filter screen surface by the cleaning plate, preventing impurities from adhering and clogging the filter screen, maintaining the filtration performance and hydrophobicity of the filter screen, and ensuring a smooth material handling process.

[0020] 5. Through the cooperation of the blocking ring, the limiting slider, and the limiting groove, the water inlet can be opened and closed adaptively. When the lifting shell moves down into the material cylinder to pick up the material, the blocking ring moves up along the limiting groove under the upward buoyancy of the liquid, automatically exposing the water inlet and ensuring that the liquid flows smoothly into the water cylinder. When the sampling is completed and the lifting shell moves up and resets, the blocking ring moves down under the downward pressure of the liquid and its own gravity, blocking the water inlet and forming a double protection. This can prevent external air, dust, and pollutants from entering the sample and avoid secondary contamination. On the other hand, it can also effectively prevent the sample from overflowing during the upward movement of the lifting shell and reduce sample loss. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the driving component of the present invention; Figure 3 This is a schematic diagram of the three-dimensional cross-section of the blocking ring of the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-section of the connecting cylinder of the present invention; Figure 5This is a schematic diagram of the material handling device of the present invention; Figure 6 This is a schematic diagram of the three-dimensional cross-section of the water intake tube of the present invention; Figure 7 This is a schematic diagram of the three-dimensional cross-section of the outer sliding sleeve of the present invention.

[0022] In the picture: 10. Mounting base; 11. Mounting bracket; 12. Material cylinder; 20. Material handling device; 21. Lifting shell; 22. Sealing plate; 23. Water inlet cylinder; 24. Water inlet hole; 25. Inner plate; 26. Collection cylinder; 27. Threaded section; 28. Threaded groove; 29. ​​Mounting hole; 210. Lifting plate; 211. Lifting component; 212. Slide rail; 213. Linkage plate; 214. Water inlet; 215. Blocking ring; 216. Limiting slider; 217. Limiting groove; 30. Filter assembly; 31. Outer ring; 32. Filter screen plate; 33. Rotating shaft; 35. Cleaning plate; 36. Sleeve; 37. Outer sliding sleeve; 38. First linkage block; 39. First spiral groove; 310. Connecting column; 311. Slide groove; 312. Base plate; 313. Slide rail; 314. Side shaft; 40. Drive assembly; 41. Top shaft; 42. Connecting cylinder; 43. Second linkage block; 44. Second spiral groove; 45. Lifting ring plate; 46. Support shaft; 47. End plate; 48. Hydraulic lever. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] As attached Figures 1-7 As shown, a sampling device for food testing samples includes a mounting base 10 and a mounting frame 11, with the mounting frame 11 mounted on top of the mounting base 10. A material cylinder 12 is mounted on the mounting base 10, and the liquid to be tested can be stored inside the material cylinder 12 for subsequent testing.

[0025] The mounting frame 11 is equipped with a material handling device 20, which is used to handle the liquid inside the material cylinder 12, so as to facilitate the detection of the liquid inside the material cylinder 12.

[0026] The material handling device 20 includes a lifting shell 21, which is annular and has a concave cavity facing downwards. A sealing plate 22 is provided at the bottom of the inner part of the lifting shell 21. The sealing plate 22 is annular and coaxially arranged with the lifting shell 21. The outer wall of the sealing plate 22 is rotatably connected to the inner wall of the lifting shell 21. The sealing plate 22 can rotate around its axis inside the lifting shell 21. Three water-guiding cylinders 23 are arranged at equal intervals on the sealing plate 22. The three water-guiding cylinders 23 are arranged in a ring on the sealing plate 22. The water-guiding cylinders 23 have an inner cavity that runs vertically through the material. A water-guiding hole 24 is opened in the water-guiding cylinder 23 away from the center of the lifting shell 21. The liquid inside the material cylinder 12 can flow into the interior of the water-guiding cylinder 23 through the water-guiding hole 24, thereby collecting the liquid.

[0027] It should be noted that the multiple water inlet cylinders 23 are used alternately, that is, the multiple water inlet cylinders 23 take the liquid inside the material cylinder 12 in turn. When the lifting shell 21 moves down into the inside of the water inlet cylinder 23, one of the water inlet cylinders 23 changes from closed to open, that is, the liquid inside the material cylinder 12 can flow into the inside of the water inlet cylinder 23 for collection. As the lifting shell 21 continues to descend, the water inlet cylinder 23 that was in the open state changes to the closed state, and then the next water inlet cylinder 23 changes from the closed state to the open state, thereby taking the liquid at different heights.

[0028] An inner plate 25 is provided between the inner top wall of the lifting shell 21 and the sealing plate 22. The inner plate 25 is coaxially arranged with the lifting shell 21 and the sealing plate 22, and the outer wall of the inner plate 25 is rotatably connected to the inner wall of the lifting shell 21. A limiting circular hole is provided on the inner plate 25, and the outer wall of the water inlet tube 23 is fixed on the inner wall of the corresponding limiting circular hole. A collection tube 26 is provided at the bottom of the water inlet tube 23, and the collection tube 26 is coaxially arranged with the water inlet tube 23 for storing the liquid flowing into the water inlet tube 23.

[0029] The top of the collecting cylinder 26 has a threaded section 27, and the bottom of the water-drawing cylinder 23 has a threaded groove 28 that is compatible with the threaded section 27. The threaded section 27 of the collecting cylinder 26 is threadedly connected to the inside of the threaded groove 28 of the water-drawing cylinder 23. The collecting cylinder 26 can be installed and removed from the water-drawing cylinder 23 through the cooperation of the threaded section 27 and the threaded groove 28.

[0030] The bottom of the sealing plate 22 is provided with a mounting hole 29 that is compatible with the collecting cylinder 26. The mounting hole 29 is coaxially arranged with the collecting cylinder 26, and the outer wall of the collecting cylinder 26 is rotatably connected to the inner wall of the mounting hole 29. The mounting hole 29 is used to limit the collecting cylinder 26 to maintain the stability of the collecting cylinder 26.

[0031] A lifting plate 210 is slidably connected inside the water intake cylinder 23, and the lifting plate 210 is coaxially arranged with the water intake cylinder 23. The outer wall of the lifting plate 210 is attached to the inner wall of the water intake cylinder 23. A T-shaped lifting component 211 is fixed to the top of the lifting plate 210. A slide rail 212 is fixed to the inner wall of the lifting shell 21 by a support arm. The slide rail 212 is annular and has an inner cavity. The lifting component 211 is slidably connected inside the inner cavity of the slide rail 212. A linkage plate 213 is fixed to the top of the slide rail 212. A water inlet 214 is opened on the outer wall of the lifting shell 21.

[0032] It should be noted that the linkage plate 213 has an arc-shaped surface. When the inner plate 25 rotates around its axis, the lifting component 211 can slide along the extension trajectory of the inner cavity of the slide rail 212. When the stepped surface of the lifting component 211 abuts against the arc-shaped surface of the linkage plate 213, and the bottom end of the arc-shaped surface slides to its top end, the lifting component 211 drives the lifting plate 210 to move upward inside the water inlet tube 23, so that a negative pressure is generated inside the water inlet tube 23, thereby suctioning the liquid outside the water inlet hole 24, so that the liquid flows into the inside of the water inlet tube 23 for collection at an accelerated rate.

[0033] A blocking ring 215 is provided on the outside of the lifting shell 21, and the blocking ring 215 is coaxially arranged with the lifting shell 21. The inner wall of the blocking ring 215 abuts against the outer wall of the lifting shell 21 to control the opening and closing state of the water inlet 214. A limit slider 216 is fixed on the inner wall of the blocking ring 215. A limit groove 217 adapted to the limit slider 216 is opened on the outer wall of the lifting shell 21, and the limit slider 216 is slidably connected inside the limit groove 217. When the lifting shell 21 moves down inside the material cylinder 12, the blocking ring 215 is subjected to the upward force of the liquid, and the blocking ring 215 moves up on the outer wall of the material cylinder 12, thereby exposing the water inlet 214. When the lifting shell 21 moves up inside the material cylinder 12, the blocking ring 215 is subjected to the downward force of the liquid, and the blocking ring 215 moves down on the outer wall of the material cylinder 12, thereby closing the water inlet 214.

[0034] The water inlet tube 23 is equipped with a filter assembly 30 to filter the liquid and prevent contaminants in the water from flowing into the water inlet tube 23.

[0035] The filter assembly 30 includes an outer ring 31 fixed on the inner wall of the water inlet hole 24. A hollow filter screen plate 32 is installed on the inner wall of the outer ring 31 for filtering the liquid flowing into the water inlet hole 24. A rotating shaft 33 is rotatably connected to the inner wall of the central hole of the filter screen plate 32, and the rotating shaft 33 is coaxially arranged with the filter screen plate 32. A cleaning plate 35 is fixed to the outer wall of one end of the rotating shaft 33. When the rotating shaft 33 rotates, the rotating shaft 33 drives the cleaning plate 35 to clean the surface of the filter screen plate 32, thereby maintaining the filtration performance of the filter screen plate 32.

[0036] A sleeve 36 is fixed to the inner wall of the water inlet cylinder 23, and the sleeve 36 is coaxially arranged with the rotating shaft 33. The end of the rotating shaft 33 facing the sleeve 36 is rotatably connected to one side wall of the sleeve 36. An outer sliding sleeve 37 is slidably connected to the outer wall of the rotating shaft 33, and the outer sliding sleeve 37 is coaxially arranged with the sleeve 36. A first linkage block 38 is fixed to the outer wall of the rotating shaft 33. A first spiral groove 39 adapted to the first linkage block 38 is opened on the inner wall of the outer sliding sleeve 37, and the first linkage block 38 is slidably connected inside the first spiral groove 39. When the outer sliding sleeve 37 slides toward the sleeve 36, the first linkage block 38 can slide along the extension trajectory of the first spiral groove 39, thereby driving the rotating shaft 33 to rotate, so as to drive the cleaning plate 35 to clean the filter surface of the filter screen plate 32.

[0037] A connecting post 310 is fixed to one end of the outer sliding sleeve 37 facing the sleeve 36. A groove 311 adapted to the connecting post 310 is opened on the side of the sleeve 36 facing the outer sliding sleeve 37. The connecting post 310 is slidably connected inside the groove 311. The connecting post 310 and the groove 311 are used to limit the outer sliding sleeve 37 to maintain the stability of the outer sliding sleeve 37.

[0038] The bottom of the lifting plate 210 is fixed with a base plate 312, and the outer wall of the outer sliding sleeve 37 is fixed with a side shaft 314. The base plate 312 is provided with a slide rail 313 that is adapted to the side shaft 314, and the side shaft 314 is slidably connected inside the slide rail 313.

[0039] It should be noted that the slide 313 has a bottom end and a top end. The top end of the slide 313 is close to the sleeve 36, that is, the top end of the slide 313 is far away from the outer ring 31. The bottom end of the slide 313 is close to the outer ring 31, that is, the top end of the slide 313 is far away from the sleeve 36. When the lifting plate 210 moves upward, the side shaft 314 slides from the top end of the slide 313 to its bottom end. At this time, the outer sliding sleeve 37 can slide on the outer wall of the sleeve 36. At this time, the first linkage block 38 slides along the extension trajectory of the first spiral groove 39, thereby driving the rotating shaft 33 to rotate.

[0040] A drive assembly 40 is installed on the lifting housing 21 to drive the lifting housing 21 to descend, while simultaneously driving the inner plate 25 to rotate.

[0041] The drive assembly 40 includes a top shaft 41 fixed to the top of the inner plate 25. The lifting housing 21 has a through hole with the top shaft 41, and the through hole is coaxial with the top shaft 41. The outer wall of the top shaft 41 is rotatably connected to the inner wall of the through hole. A connecting cylinder 42 is provided on the outside of the top shaft 41, and the top of the connecting cylinder 42 is fixed to the inner top wall of the mounting bracket 11. A second linkage block 43 is fixed on the outer wall of the top shaft 41. A second spiral groove 44 is provided on the inner wall of the connecting cylinder 42, and the second linkage block 43 is slidably connected inside the second spiral groove 44.

[0042] A lifting ring plate 45 is slidably connected to the outside of the connecting cylinder 42. A support shaft 46 is fixed between the bottom of the lifting ring plate 45 and the top of the lifting shell 21. An end plate 47 is fixed to the outer wall of the lifting ring plate 45. A hydraulic rod 48 is installed on the mounting bracket 11, and the piston rod end of the hydraulic rod 48 is connected to the top of the end plate 47.

[0043] In use, the material cylinder 12 containing the liquid sample is placed on top of the mounting frame 11, corresponding to the bottom of the lifting shell 21. The piston rod end of the hydraulic rod 48 drives the lifting ring plate 45 to move downward through the end plate 47. The lifting ring plate 45 moves downward along the outer wall of the connecting cylinder 42, and the lifting ring plate 45 drives the outer ring 31 to move downward through the support shaft 46. At this time, the second linkage block 43 slides along the extension trajectory of the second spiral groove 44, and the top shaft 41 rotates around its axial direction. At this time, the lifting shell 21... When liquid 1 falls into the material cylinder 12, the blocking ring 215 is subjected to an upward force from the liquid and moves upward, exposing the inlet 214. As the top shaft 41 drives the inner plate 25 to rotate inside the lifting shell 21, the inner plate 25 drives the connected water inlet cylinder 23 to slide circumferentially. One of the water inlet cylinders 23 slides towards the corresponding inlet 214 first, and the water inlet hole 24 on the water inlet cylinder 23 is connected to the corresponding inlet 214. The liquid inside the material cylinder 12 flows through the inlet 214 and the water inlet hole 214. 4. The liquid flows into the water inlet cylinder 23 and is stored inside the collection cylinder 26. Simultaneously, the water inlet cylinder 23 slides towards the corresponding linkage plate 213, while the lifting component 211 abuts against the bottom of the arc-shaped surface of the linkage plate 213. As the inner disc 25 rotates, the lifting component 211 slides from the bottom to the top of the linkage plate 213. The upward-moving lifting component 211 drives the lifting plate 210 to move upward inside the water inlet cylinder 23, creating negative pressure inside the water inlet cylinder 23 and accelerating the flow of liquid from the material cylinder 12 into the water inlet cylinder. Inside the cylinder 23, as the lifting plate 210 moves upward, the side shaft 314 slides from the top of the slide rail 313 to its bottom. The side shaft 314 drives the outer sliding sleeve 37 to slide on the outer wall of the sleeve 36. The first linkage block 38 slides along the extension trajectory of the first spiral groove 39. At this time, the rotating shaft 33 rotates, and the rotating shaft 33 drives the cleaning plate 35 to clean the surface of the filter screen plate 32, so as to prevent dirt from adhering to the surface of the filter screen plate 32 and maintain the filtration and hydrophobicity of the filter screen plate 32.

[0044] As the inner plate 25 rotates, the water inlet 24 connected to the water inlet 214 disengages from the water inlet 214, and the water inlet 214 and the water inlet 24 are no longer connected. The lifting component 211 slides towards the plane of the linkage plate 213, while the adjacent water inlet cylinder 23 rotates to the corresponding water inlet 214, thus repeating the above operation. After the lifting shell 21 descends to its limit position, the collecting cylinder 26 collects liquid from different height positions. Then, the hydraulic lever 48 drives the lifting ring plate 45 to move upward, while the blocking ring 215 is subjected to the downward force of the liquid and blocks the water inlet 214 until the lifting shell 21 moves upward out of the material cylinder 12. Then, the collecting cylinder 26 is turned, and the liquid collected inside the collecting cylinder 26 is checked.

[0045] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A sampling device for food testing samples, characterized in that: It includes a mounting base (10) and a mounting bracket (11), with the mounting bracket (11) mounted on top of the mounting base (10). A material cylinder (12) is mounted on the mounting base (10), and the liquid to be tested can be stored inside the material cylinder (12). The mounting frame (11) is equipped with a material handling device (20), which includes a lifting shell (21). The lifting shell (21) is annular and has a concave cavity facing downwards. A sealing plate (22) is provided at the bottom of the inner side of the lifting shell (21). The outer wall of the sealing plate (22) is rotatably connected to the inner wall of the lifting shell (21). The sealing plate (22) can rotate around its axial direction inside the lifting shell (21). Three water inlet tubes (23) are arranged at equal intervals on the sealing plate (22). The three water inlet tubes (23) are arranged in a ring on the sealing plate (22). The water inlet tubes (23) have an inner cavity that runs through the top and bottom. A water inlet hole (24) is opened at the center of the water inlet tube (23) away from the lifting shell (21). A collection tube (26) is provided at the bottom of the water inlet tube (23). The collection tube (26) is coaxially arranged with the water inlet tube (23) and is used to store the liquid flowing into the water inlet tube (23).

2. The sampling device for food testing samples according to claim 1, characterized in that, An inner plate (25) is provided between the inner top wall of the lowering shell (21) and the sealing plate (22). The inner plate (25) is coaxially arranged with the lowering shell (21) and the sealing plate (22), and the outer wall of the inner plate (25) is rotatably connected to the inner wall of the lowering shell (21). A limiting hole is provided on the inner plate (25), and the outer wall of the water pipe (23) is fixed on the inner wall of the corresponding limiting hole.

3. The sampling device for food testing samples according to claim 2, characterized in that, The top of the collecting cylinder (26) has a threaded section (27), and the bottom of the water-drawing cylinder (23) has a threaded groove (28) that matches the threaded section (27). The threaded section (27) of the collecting cylinder (26) is threadedly connected to the inside of the threaded groove (28) of the water-drawing cylinder (23). The collecting cylinder (26) can be disassembled and installed on the water-drawing cylinder (23) through the cooperation of the threaded section (27) and the threaded groove (28). The bottom of the sealing plate (22) has an installation hole (29) that matches the collecting cylinder (26). The installation hole (29) is coaxially set with the collecting cylinder (26), and the outer wall of the collecting cylinder (26) is rotatably connected to the inner wall of the installation hole (29). The installation hole (29) is used to limit the collecting cylinder (26) to maintain the stability of the collecting cylinder (26).

4. The sampling device for food testing samples according to claim 1, characterized in that, The water intake tube (23) is slidably connected to a lifting plate (210), and the lifting plate (210) is coaxially arranged with the water intake tube (23). The outer wall of the lifting plate (210) is attached to the inner wall of the water intake tube (23). A T-shaped lifting component (211) is fixed to the top of the lifting plate (210). A slide rail (212) is fixed to the inner wall of the lifting shell (21) through a support arm. The slide rail (212) is annular and has an inner cavity. The lifting component (211) is slidably connected to the inner cavity of the slide rail (212). A linkage plate (213) is fixed to the top of the slide rail (212). A water inlet (214) is opened on the outer wall of the lifting shell (21).

5. A sampling device for food testing samples according to claim 4, characterized in that, The lifting shell (21) is provided with a blocking ring (215) on its outside, and the blocking ring (215) is coaxially arranged with the lifting shell (21). The inner wall of the blocking ring (215) abuts against the outer wall of the lifting shell (21) to control the opening and closing state of the water inlet (214). The inner wall of the blocking ring (215) is fixed with a limit slider (216). The outer wall of the lifting shell (21) is provided with a limit groove (217) that is adapted to the limit slider (216), and the limit slider (216) is slidably connected inside the limit groove (217).

6. The sampling device for food testing samples according to claim 5, characterized in that, The water inlet tube (23) is equipped with a filter assembly (30). The filter assembly (30) includes an outer ring (31) fixed on the inner wall of the water inlet hole (24). A hollow filter screen plate (32) is installed on the inner wall of the outer ring (31) for filtering the liquid flowing into the water inlet hole (24). A rotating shaft (33) is rotatably connected to the inner wall of the center hole of the filter screen plate (32), and the rotating shaft (33) is coaxial with the filter screen plate (32). A cleaning plate (35) is fixed on the outer wall of one end of the rotating shaft (33). When the rotating shaft (33) rotates, the rotating shaft (33) drives the cleaning plate (35) to clean the surface of the filter screen plate (32), thereby maintaining the filtration performance of the filter screen plate (32).

7. The sampling device for food testing samples according to claim 6, characterized in that, The inner wall of the water-drawing cylinder (23) is fixed with a sleeve (36), and the sleeve (36) is coaxially arranged with the rotating shaft (33). The end of the rotating shaft (33) facing the sleeve (36) is rotatably connected to one side wall of the sleeve (36). The outer wall of the rotating shaft (33) is slidably connected with an outer sliding sleeve (37), and the outer sliding sleeve (37) is coaxially arranged with the sleeve (36). The outer wall of the rotating shaft (33) is fixed with a first linkage block (38). The inner wall of the outer sliding sleeve (37) is provided with a first spiral groove (39) that matches the first linkage block (38), and the first linkage block (38) is slidably connected inside the first spiral groove (39).

8. The sampling device for food testing samples according to claim 7, characterized in that, The outer sliding sleeve (37) is fixed with a connecting post (310) at one end facing the sleeve (36). The sleeve (36) has a groove (311) that matches the connecting post (310) on one side facing the outer sliding sleeve (37). The connecting post (310) is slidably connected inside the groove (311). The connecting post (310) and the groove (311) are used to limit the outer sliding sleeve (37) to maintain the stability of the outer sliding sleeve (37).

9. A sampling device for food testing samples according to claim 8, characterized in that, The bottom of the lifting plate (210) is fixed with a base plate (312), and the outer wall of the outer sliding sleeve (37) is fixed with a side shaft (314). The base plate (312) is provided with a slide rail (313) that is compatible with the side shaft (314), and the side shaft (314) is slidably connected inside the slide rail (313).

10. A sampling device for food testing samples according to claim 2, characterized in that, The drive assembly (40) includes a top shaft (41) fixed to the top of the inner disk (25). A through hole is provided on the lifting housing (21) for the top shaft (41), and the through hole is coaxial with the top shaft (41). The outer wall of the top shaft (41) is rotatably connected to the inner wall of the through hole. A connecting cylinder (42) is provided outside the top shaft (41), and the top of the connecting cylinder (42) is fixed to the inner top wall of the mounting bracket (11). A second linkage block (43) is fixed to the outer wall of the top shaft (41). The inner wall is provided with a second spiral groove (44), and the second linkage block (43) is slidably connected inside the second spiral groove (44). The outer side of the connecting cylinder (42) is slidably connected with a lifting ring plate (45). A support shaft (46) is fixed between the bottom of the lifting ring plate (45) and the top of the lifting shell (21). An end plate (47) is fixed on the outer wall of the lifting ring plate (45). A hydraulic rod (48) is installed on the mounting bracket (11), and the piston rod end of the hydraulic rod (48) is connected to the top of the end plate (47).

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