Multifunctional food safety rapid detection analyzer and solid-liquid fixed-proportion sampling method

Abstract

The invention relates to a multifunctional food safety rapid detection analyzer and a solid-liquid fixed-proportion sampling method. The total weight of fruits and vegetables is weighed before crushing, the total weight of liquid is weighed after solid-liquid separation, the solid-liquid ratio is calculated, solid-liquid separation is conducted through a spiral extrusion type solid-liquid separator, solid-liquid separation can be achieved to the maximum extent, and the obtained liquid material is closest to the actual liquid content in the fruits and vegetables; the adopted solid-to-liquid ratio is closest to the real solid-to-liquid ratio of fruits and vegetables, so that the subsequent sampling and measuring precision is improved; then, the position of a supporting point of a lever mechanism is adjusted according to the solid-to-liquid ratio, so that the ratio of the distance from the supporting point to the liquid test tube to the distance from the supporting point to the solid test tube is consistent with the calculated solid-to-liquid ratio; therefore, the weight ratio of corresponding materials in the solid-liquid test tube is basically consistent with the actual solid-liquid ratio of fruits and vegetables to be measured.

Description

Technical Field

[0001] The invention relates to a multifunctional food safety rapid detection analyzer and a solid-liquid constant ratio sampling method. Background Art

[0002] The food safety rapid detection analyzer is an instrument used to achieve on-site rapid screening of harmful substances in food. It can be widely used for the rapid quantitative determination of pesticide residues, formaldehyde, sulfur dioxide, nitrite, bleaching powder and radioactive nuclides in agricultural and sideline products, daily foods, seafood and their products. Its detection accuracy has always been of paramount importance.

[0003] When testing foods with high water content, such as fruits and vegetables, the whole fruit is generally tested for sampling uniformity. However, due to the high water content of fruits and vegetables, the crushed samples will be separated into solid and liquid layers, resulting in inconsistent solid-liquid ratios in the sample materials taken out each time. In other words, the sample is not representative of the fruits and vegetables, which will lead to deviations in the analysis results.

[0004] In this regard, the Chinese invention patent with announcement number CN118671284B discloses a multifunctional food safety rapid detection analyzer and a solid-liquid fixed ratio sampling method. The method uses a solid storage box and a liquid storage box. In the initial state, the solid storage box and the liquid storage box are at the same height. After the material is crushed into solid material and liquid material by a crushing mechanism, the solid material and the liquid material are respectively put into the solid storage box and the liquid storage box. Due to the inconsistent ratio of solid material and liquid material in the material itself, the height of the solid storage box and the liquid storage box are inconsistent. The connecting rod is then moved to make the height of the solid storage box and the liquid storage box consistent. Then, the solid material is first taken out and placed in a test tube. The height of the solid storage box and the liquid storage box are inconsistent again. The liquid material is then taken out until the height of the solid storage box and the liquid storage box are consistent again, so that the solid-liquid ratio in the test tube is consistent with the solid-liquid ratio in the material, avoiding the problem of inconsistent solid-liquid ratio of the material in the test tube each time sampling due to solid-liquid separation of the crushed material.

[0005] However, when this patent is actually used, it does not really solve the problem that the solid-liquid ratio of the sample is consistent with the original solid-liquid ratio of the original fruits and vegetables. The main reasons are as follows: First, it has the problem of incomplete solid-liquid separation after crushing. This is mainly because after the fruits and vegetables are crushed, the solid-liquid separation is carried out by using the principle of liquid gravity flowing downward. A lot of fruit juice or vegetable juice will remain in the solid residue to form a slurry, making the "solid" after separation more than the actual amount and the "liquid" less than the actual amount, that is, the solid-liquid ratio is larger than the actual amount. In subsequent sampling, due to the use of the solid-liquid ratio after separation and the lever balance, The subsequent sampling based on the principle further increases the error of the solid-liquid ratio, resulting in a gradually amplified impact on the final test results and low test accuracy. Secondly, due to incomplete solid-liquid separation, the "solid" is actually a viscous "slurry" with a large adhesion force (especially the fruit with high sugar content has a greater adhesion force), which will adhere to the curved plate, causing the material falling into the solid storage box to be less than the actual amount. This further increases the uncontrollability of the solid-liquid ratio, making it difficult for the solid-liquid ratio to be consistent with the actual solid-liquid ratio. In this case, accurate measurement results cannot be obtained in the subsequent sampling and testing process. Summary of the Invention

[0006] The object of the present invention is to provide a multifunctional food safety rapid detection and analysis instrument that can achieve a solid-liquid ratio obtained after crushing that is basically the same as the original solid-liquid ratio of the sample fruits and vegetables, thereby improving the accuracy of the detection as much as possible; the object of the present invention is also to provide a solid-liquid fixed ratio sampling method using the above-mentioned multifunctional food safety rapid detection and analysis instrument.

[0007] The technical solution of the multifunctional food safety rapid detection and analysis instrument of the present invention is as follows: The multifunctional food safety rapid detection and analysis instrument comprises: The upper hopper includes a hopper body with upper and lower openings and a bottom plate that moves horizontally at the lower opening to open and close the lower opening. A weighing sensor is provided at the bottom of the bottom plate. The upper hopper can weigh the material to be measured and facilitate the material to enter the crusher. The crusher includes a crushing inlet and a crushing outlet, wherein the crushing inlet is connected to the lower opening of the upper hopper; The spiral extrusion type solid-liquid separator includes a separation chamber and a spiral extrusion plate. The separation chamber includes a feed port connected below the crushing outlet and a slag outlet at one end of the extrusion direction. The lower part of the separation chamber is also provided with a liquid outlet. A filter cartridge is sleeved between the separation chamber and the spiral extrusion plate. The spiral extrusion plate is rotatably assembled in the separation chamber. The spiral extrusion type solid-liquid separator can fully squeeze the material. The squeezed liquid material flows out through the filter cartridge and finally flows out from the liquid outlet. Since the spiral extrusion plate is used to continuously transport and squeeze the material at one end of the separation chamber, the material can be fully squeezed, making the solid-liquid separation more thorough. The liquid storage barrel is connected below the liquid outlet, and is provided with a liquid outlet at the bottom, and a first stop valve is provided at the liquid outlet; A weighing platform is placed under the liquid storage barrel and is used to weigh the weight of the liquid in the liquid storage barrel; The solid storage tank is connected below the slag outlet and has a solid outlet at the bottom, and a second stop valve is provided at the solid outlet; The lever mechanism includes a lever and a support seat. Test tube racks are provided at both ends of the lever, and test tubes are placed in the test tube racks. The support seat serves as the fulcrum of the lever and can move relative to the lever along the length direction of the lever.

[0008] Based on the above solution, a further improvement is provided as follows: the support base comprises a sleeve that fits over the lever, a set plate hinged to the lower portion of the sleeve, and a plurality of rollers disposed below the set plate. This structure not only prevents the support base from separating from the lever but also facilitates flexible rotation of the lever. The provision of the rollers also facilitates adjustment of the support base's position.

[0009] Based on the above solution, a further improvement is made as follows: the support base is pushed to move relative to the lever by a drive mechanism, the drive mechanism including a first electric push rod, the front end of the telescopic rod of the first electric push rod being connected to the triangular plate, and a clamping clamp fixed to the housing of the first electric push rod for clamping the lever. The setting of the drive mechanism can more accurately adjust the position of the support point through electronic control. For example, the solid-liquid ratio value obtained by weighing and calculation can be directly used to calculate the distance in which direction the support base needs to move, thereby using the telescopic movement of the first electric push rod to drive the support base to move the corresponding distance. The setting of the clamping clamp ensures that when the support base is moved, the lever will not move accordingly.

[0010] Based on the above solution, a further improvement is provided as follows: a high-pressure gas nozzle is installed at the crushing inlet, connected to an air source via a hose. The airflow ejected by the high-pressure gas nozzle completely covers the crushing inlet. By installing the high-pressure gas nozzle, the airflow can be used to spray the material in the crusher and even the spiral extrusion solid-liquid separator, allowing the material to fall into the corresponding storage tank more quickly and minimizing the amount of material remaining on the inner wall or surface. In particular, the liquid can flow more completely into the liquid storage tank, ensuring a more accurate calculation of the solid-liquid ratio.

[0011] Based on the above solution, a further improvement is made as follows: the high-pressure gas nozzle is installed below the bottom plate to move horizontally with the bottom plate. This arrangement ensures that when the fruits and vegetables to be tested fall into the crusher, they will not hit the high-pressure gas nozzle, that is, they will not interfere with each other.

[0012] Based on the above solution, a further improvement is made as follows: the base plate is driven by a second electric push rod to reciprocate in the horizontal direction.

[0013] On the basis of the above solution, a further improvement is made as follows: a conical surface is provided in a section of the separation chamber corresponding to the feed port to encourage solid or liquid materials to flow along the conical surface toward the filter cartridge.

[0014] The technical solution of the solid-liquid constant ratio sampling method of the present invention is as follows: The solid-liquid constant ratio sampling method comprises the following steps: S10, weighing the fruits and vegetables to be tested, placing the fruits and vegetables to be tested on the bottom plate of the upper hopper, and weighing their weight using a weighing sensor, which is recorded as M0; S20, crushing the fruits and vegetables to be tested, horizontally moving the bottom plate to open the lower opening of the upper hopper, so that the fruits and vegetables to be tested on the bottom plate enter the crushing inlet of the crusher for crushing; S30, performing solid-liquid separation on the crushed fruit and vegetable materials. The fruit and vegetable crushed materials enter the feed port of the spiral extrusion solid-liquid separator, and are unidirectionally extruded by the rotating spiral extrusion plate. The liquid material is filtered by the filter cartridge and flows into the liquid storage tank from the liquid outlet. The solid material can be discharged into the solid storage tank by opening the slag outlet; S40, weighing the liquid material. After all the liquid material flows out of the liquid outlet, the weight of the liquid material in the liquid storage barrel is weighed on a weighing platform, recorded as M1, and the theoretical solid-liquid ratio K0 is calculated by (M0-M1) / M1; S50, adjusting the support point position of the lever mechanism, keeping the lever position fixed, and adjusting the position of the support base relative to the lever. The distance between the support base and one end of the liquid test tube is recorded as L1, and the distance between the support base and one end of the solid test tube is recorded as L2, so that L1 / L2=K0; S60: Take samples of solid and liquid separately. Open the first stop valve to allow the liquid material in the liquid storage barrel to flow into the liquid test tube through the liquid outlet. When the set amount is reached, close the first stop valve. Open the second stop valve to allow the solid material in the solid storage barrel to fall into the solid test tube. Close the second stop valve when the lever is horizontal, and the sampling is completed. At this time, the ratio of the weight of the liquid material taken from the solid test tube to the mass of the solid material taken from the solid test tube is the same as the solid-liquid ratio K0.

[0015] Based on the above scheme, further improvements are made as follows: the position of the support seat relative to the lever is changed by a driving mechanism, the driving mechanism includes a first electric push rod, the front end of the telescopic rod of the first electric push rod is connected to the support seat, and a clamp is fixed on the shell of the first electric push rod, and the lever is clamped by the clamp to fix the lever.

[0016] On the basis of the above scheme, further improvements are made as follows: during the crushing process of the fruits and vegetables to be tested, a high-pressure gas nozzle is set at the crushing inlet to blow high-pressure airflow from top to bottom into the crusher to reduce the residue of fruit and vegetable crushed materials on the crusher.

[0017] Beneficial effects of the present invention: The multifunctional food safety rapid detection analyzer and solid-liquid constant ratio sampling method of the present invention weighs the total weight of the fruits and vegetables to be measured before crushing, and weighs the total weight of the liquid material after crushing and solid-liquid separation, thereby calculating the solid-liquid ratio. Since the present application uses a spiral extrusion solid-liquid separator to separate the solid and liquid, it can achieve maximum solid-liquid separation, so that the obtained liquid material is closest to the actual liquid content in the fruits and vegetables to be measured, ensuring that the solid-liquid ratio adopted is closest to the actual solid-liquid ratio of the fruits and vegetables, thereby improving the accuracy of subsequent sampling and measurement; subsequently, it is necessary to adjust the position of the support point of the lever mechanism according to the solid-liquid ratio value calculated by weighing, so that the ratio of the distance from the support point to the liquid test tube to the distance from the support point to the solid test tube is consistent with the solid-liquid ratio calculated by the above weighing. Subsequently, when the corresponding solid material and liquid material are respectively flowed into the solid test tube and the liquid test tube, it is only necessary to ensure that the lever is level to ensure that the weight ratio of the corresponding materials in the solid test tube and the liquid test tube is basically consistent with the actual solid-liquid ratio of the fruits and vegetables to be measured, thereby achieving constant ratio sampling with the same solid-liquid ratio as the fruits and vegetables. It can be seen that the technical solution of the present application can achieve sampling with a solid-liquid ratio closest to the actual solid-liquid ratio in fruits and vegetables during sampling, thereby improving the accuracy of sampling and further improving the accuracy of subsequent measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structural principle of the sampling part in one embodiment of the multifunctional food safety rapid detection and analysis instrument of the present invention; Figure 2 for Figure 1 A partial enlarged view of point A in the middle; Figure 3 for Figure 1 A partial enlarged view of point B in the middle; Figure 4 for Figure 1 A partial enlarged view of point C in the middle; In the figure: 1-upper hopper, 11-upper opening, 12-lower opening, 13-bottom plate, 14-weighing sensor, 15-second electric push rod, 2-high-pressure gas nozzle, 21-hose, 22-air pump, 3-crusher, 31-crushing inlet, 32-crushing outlet, 33-crushing cutter shaft, 4-screw extrusion solid-liquid separator, 41-separation chamber, 411-feeding port, 412-slag outlet, 413-liquid outlet, 42-filter cartridge, 43-screw extrusion plate, 431-rotating shaft, 44-reduction motor, 45 -bearing, 46-slag discharge door, 47-guide plate, 48-conical surface, 5-liquid storage barrel, 51-liquid outlet, 52-first stop valve, 6-weighing platform, 7-solid storage barrel, 71-solid outlet, 72-second stop valve, 8-lever mechanism, 81-lever, 82-test tube rack, 83-solid test tube, 84-liquid test tube, 85-support seat, 851-sliding sleeve, 852-triangular plate, 853-articulated shaft, 854-roller, 9-driving mechanism, 91-first electric push rod, 92-clamping clamp. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0021] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0022] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0023] An embodiment of the multifunctional food safety rapid detection analyzer of the present invention: Figure 1 As shown in the figure, it is a structural principle diagram of the sampling part of the multifunctional food safety rapid detection analyzer, and the detection module or other modules are existing technologies and are not described in detail.

[0024] The multifunctional food safety rapid detection analyzer mainly includes a loading hopper 1, a high-pressure gas nozzle 2, a crusher 3, a spiral extrusion solid-liquid separator 4, a solid storage barrel 7, a liquid storage barrel 5, a weighing platform 6, a lever mechanism 8, a test tube, a driving mechanism 9, etc.

[0025] Specifically, if Figure 1-2 As shown, the upper hopper 1 includes a hopper body with upper and lower openings. The hopper body is cylindrical and made of stainless steel. It also includes a bottom plate 13 that moves horizontally at its lower opening 12 to realize the opening and closing of the lower opening 12. The bottom plate 13 is made of stainless steel. When sliding, its upper surface is in contact with the lower surface of the hopper body. A weighing sensor 14 is provided at the lower part of the bottom plate 13 for weighing the weight of the fruits and vegetables to be tested on the bottom plate 13. The upper hopper 1 can realize the weighing of the material to be measured and facilitate the material to enter the crusher 3; the bottom plate 13 is driven by the second electric push rod 15 to move back and forth in the horizontal direction, thereby realizing the opening and closing of the lower opening 12.

[0026] like Figure 2 As shown, the crusher 3 includes a shell and a pair of crushing shafts 33 rotatably arranged in the shell. The crushing shafts 33 have a smooth outer surface as much as possible to minimize liquid residue. The shell includes a crushing inlet 31 and a crushing outlet 32. The crushing inlet 31 is connected below the lower opening 12 of the upper hopper 1.

[0027] like Figure 3As shown, the spiral extrusion solid-liquid separator 4 includes a separation chamber 41 with a cylindrical main body and a spiral extrusion plate 43. The separation chamber 41 includes a feed port 411 connected to the bottom of the crushing outlet 32 and a slag outlet 412 located at one end of the extrusion direction. The feed port 411 is located at the upper left end of the separation chamber 41, and the slag outlet 412 is located at the lower right end of the separation chamber 41. A slag door 412 is provided at the slag outlet 412. One side of the slag door 412 is hinged to one side of the slag outlet 412, and the other side is connected by a snap mechanism to ensure that the slag door 412 is in a normally closed state and is opened only when the extrusion separation is completed and the solid material is discharged. A liquid outlet 413 is also provided at the lower part of the separation chamber 41. A funnel-shaped confluence structure is correspondingly provided at the liquid outlet 413 to ensure that all liquids in the entire separation chamber 41 can be confluent to the liquid outlet 413. A conical surface 48 is provided in the separation bin body 41 at a section corresponding to the feed port 411. The diameter of the conical surface 48 expands from left to right to encourage solid or liquid materials to flow along the conical surface 48 to the filter cartridge 42. A filter cartridge 42 is sleeved between the separation bin body 41 and the spiral extrusion plate 43. The filter cartridge 42 is a cylindrical filter structure and is mainly distributed in the right half of the separation bin body 41. The outer surface of the spiral extrusion plate 43 is almost in contact with the inner surface of the filter cartridge 42 to scrape the material off the surface of the filter cartridge 42 as much as possible. The spiral ring of the spiral extrusion plate 43 is provided on the rotating shaft 431, and the rotating shaft 431 is rotatably assembled between the left and right ends of the separation bin body 41 through bearings 45 at both ends; the rotating shaft 431, the filter cartridge 42 and the spiral extrusion plate 43 are also made of stainless steel, and the rotating shaft 431 is driven to rotate by a reduction motor 44 installed outside the separation bin body 41. The spiral extrusion solid-liquid separator 4 can fully squeeze the material, and the squeezed liquid material flows out through the filter cylinder 42 and finally flows out from the liquid outlet 413. Since the spiral extrusion plate 43 is used to continuously transport and squeeze the material at one end of the separation bin body 41, the material can be fully squeezed, making the solid-liquid separation more thorough.

[0028] like Figure 4 As shown, the liquid storage tank 5 is mounted below the liquid outlet 413 and has a liquid outlet 51 at its bottom. A first shut-off valve 52 is located at the liquid outlet 51. A weighing platform 6 is placed below the liquid storage tank 5 for weighing the liquid in the liquid storage tank 5. A solid storage tank 7 is mounted below the slag outlet 412 and has a solid outlet 71 at its bottom. This large outlet facilitates the outflow of solid material and is equipped with a second shut-off valve 72. While the solid material is flowing out of the solid outlet 71, it can be pounded down from above using other tools, such as a tamping rod.

[0029] like Figure 4As shown, the lever mechanism 8 includes a lever 81 and a support base 85. The cross-section of lever 81 is square to prevent it from rotating. Identical test tube racks 82 are located at each end of lever 81. Test tube racks 82 contain identical test tubes: solid tubes 83 for solid materials and liquid tubes 84 for liquid materials. Support base 85 serves as the fulcrum for lever 81 and is movable relative to lever 81 along its length. Support base 85 includes a sleeve 851 that fits over lever 81, a triangular plate 852 hinged to the bottom of sleeve 851, and multiple rollers 854 located below triangular plate 852. The inner cross-section of sleeve 851 is also square and sized to match that of lever 81, ensuring smooth sliding of lever 81 within sleeve 851. This structure not only prevents support base 85 from disengaging from lever 81 but also facilitates the flexible rotation of lever 81. The placement of rollers 854 also facilitates adjustment of the position of support base 85. The support seat 85 is pushed relative to the lever 81 by the drive mechanism 9. The drive mechanism 9 includes a first electric push rod 91. The front end of the telescopic rod of the first electric push rod 91 is connected to the triangle plate 852. A clamp 92 is fixed to the housing of the first electric push rod 91 for clamping the lever 81. The clamp 92 does not include two movable blocks, but is spliced into a clamp structure with a square inner hole. The setting of the drive mechanism 9 can more accurately adjust the support point position through electronic control. For example, the solid-liquid ratio value obtained by weighing and calculation can be directly used to calculate the distance in which direction the support seat 85 needs to move, thereby using the telescopic movement of the first electric push rod 91 to drive the support seat 85 to move the corresponding distance. The setting of the clamp 92 ensures that when the support seat 85 is moved, the lever 81 will not move accordingly.

[0030] like Figure 1 、 2 As shown, a high-pressure gas nozzle 2 is provided at the crushing inlet 31, and the high-pressure gas nozzle 2 is connected to the gas source through a hose 21. The airflow ejected by the high-pressure gas nozzle 2 completely covers the crushing inlet 31. By providing the high-pressure gas nozzle 2, the material in the crusher 3 and even the spiral extrusion solid-liquid separator 4 can be sprayed by the airflow, so that the material falls into the corresponding storage barrel faster and the material residue on the inner wall or surface is minimized. In particular, the liquid can flow more thoroughly into the liquid storage barrel 5, ensuring that the subsequent calculation of the solid-liquid ratio is more accurate. The high-pressure gas nozzle 2 is installed under the bottom plate 13 to move horizontally with the bottom plate 13. This arrangement ensures that when the fruits and vegetables to be tested fall into the crusher 3, they will not collide with the high-pressure gas nozzle 2, that is, they will not interfere with each other. The bottom plate 13 is driven by the second electric push rod 15 to move back and forth in the horizontal direction.

[0031] The specific embodiment of the solid-liquid ratio sampling method of the present invention is as follows: The solid-liquid ratio sampling method is an operation method of using the multifunctional food safety rapid detection analyzer to perform solid-liquid ratio sampling, and the specific steps are as follows: Weigh the weight of the fruits and vegetables to be tested. Place the fruits and vegetables to be tested on the bottom plate 13 of the upper hopper 1 and measure their weight using the weighing sensor 14, which is recorded as M0; Crushing the fruits and vegetables to be tested: the second electric push rod 15 moves the bottom plate 13 horizontally to open the lower opening 12 of the upper hopper 1, so that the fruits and vegetables to be tested on the bottom plate 13 enter the crushing inlet 31 of the crusher 3 for crushing. During the crushing process of the fruits and vegetables to be tested, a high-pressure gas nozzle 2 is provided at the crushing inlet 31 to spray high-pressure air from top to bottom into the crusher 3, so as to reduce the residue of fruit and vegetable crushed materials on the crusher 3; The crushed fruit and vegetable materials are subjected to solid-liquid separation. The fruit and vegetable crushed materials enter the feed port 411 of the spiral extrusion solid-liquid separator 4, and are unidirectionally squeezed by the rotating spiral extrusion plate 43. The liquid material is filtered by the filter cylinder 42 and flows into the liquid storage tank 5 from the liquid outlet 413. The solid material can be discharged into the solid storage tank 7 by opening the slag discharge door 412 at the slag discharge port 412; Weigh the liquid material. After all the liquid material flows out of the liquid outlet 413, weigh the liquid material in the liquid storage tank 5 using the weighing platform 6, record it as M1, and calculate the theoretical solid-liquid ratio K0 by (M0-M1) / M1. Adjust the support point position of the lever mechanism 8, keep the lever 81 in a fixed position, and adjust the position of the support base 85 relative to the lever 81. The distance between the support base 85 and one end of the liquid test tube 84 is recorded as L1, and the distance between the support base 85 and one end of the solid test tube 83 is recorded as L2, so that L1 / L2=K0; change the position of the support base 85 relative to the lever 81 by the driving mechanism 9. The driving mechanism 9 includes a first electric push rod 91. The front end of the telescopic rod of the first electric push rod 91 is connected to the support base 85. A clamp 92 is fixed to the housing of the first electric push rod 91. The clamp 92 clamps the lever 81 to fix the lever 81. Solid and liquid samples are taken separately. The first stop valve 52 is opened to allow the liquid material in the liquid storage barrel 5 to flow into the liquid test tube 84 through the liquid outlet 413. When the set amount is reached, the first stop valve 52 is closed and the second stop valve 72 is opened. With the help of tools, the solid material in the solid storage barrel 7 is allowed to fall into the solid test tube 83 until the lever 81 is horizontal and the second stop valve 72 is closed to complete the sampling. At this time, the ratio of the weight of the liquid material taken from the solid test tube 83 to the mass of the solid material taken from the solid test tube 83 is the same as the solid-liquid ratio K0.

[0032] The multifunctional food safety rapid detection analyzer and solid-liquid ratio sampling method of the present invention weighs the total weight of the fruits and vegetables to be measured before crushing, and weighs the total weight of the liquid material after crushing and solid-liquid separation, and then calculates the solid-liquid ratio. Since the present application adopts a spiral extrusion solid-liquid separator 4 to separate the solid and liquid, it can achieve the maximum degree of solid-liquid separation, so the liquid material obtained is closest to the actual liquid content in the fruits and vegetables to be measured, ensuring that the solid-liquid ratio used is closest to the actual solid-liquid ratio of the fruits and vegetables, thereby improving the accuracy of subsequent sampling and measurement; subsequently, it is necessary to use this The position of the support point of the lever mechanism 8 is adjusted by the solid-liquid ratio value calculated by weighing, so that the ratio of the distance from the support point to the liquid test tube 84 to the distance from the support point to the solid test tube 83 is consistent with the solid-liquid ratio calculated by weighing. Subsequently, when the corresponding solid material and liquid material flow into the solid test tube 83 and the liquid test tube 84 respectively, it is only necessary to ensure that the lever 81 is horizontal to ensure that the weight ratio of the corresponding materials in the solid test tube 83 and the liquid test tube 84 is basically consistent with the actual solid-liquid ratio of the fruits and vegetables to be measured, thereby achieving a fixed-ratio sampling that is the same as the solid-liquid ratio in the fruits and vegetables. It can be seen that the technical solution of the present application can achieve sampling with a solid-liquid ratio that is closest to the actual solid-liquid ratio in the fruits and vegetables during sampling, thereby improving the accuracy of sampling and further improving the accuracy of subsequent measurements.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. Multifunctional food safety rapid detection analyzer, characterized in that, include: The upper hopper includes a hopper body with upper and lower openings and a bottom plate that moves horizontally at the lower opening to open and close the lower opening, and a weighing sensor is provided at the lower part of the bottom plate; The crusher includes a crushing inlet and a crushing outlet, wherein the crushing inlet is connected to the lower opening of the upper hopper; The spiral extrusion solid-liquid separator includes a separation chamber and a spiral extrusion plate. The separation chamber includes a feed port connected below the crushing outlet and a slag outlet at one end of the extrusion direction. The lower part of the separation chamber is also provided with a liquid outlet. A filter cartridge is provided between the separation chamber and the spiral extrusion plate. The spiral extrusion plate is rotatably assembled in the separation chamber. The liquid storage barrel is connected below the liquid outlet, and is provided with a liquid outlet at the bottom, and a first stop valve is provided at the liquid outlet; A weighing platform is placed under the liquid storage barrel and is used to weigh the weight of the liquid in the liquid storage barrel; The solid storage tank is connected below the slag outlet and has a solid outlet at the bottom, and a second stop valve is provided at the solid outlet; The lever mechanism includes a lever and a support seat. Test tube racks are provided at both ends of the lever, and test tubes are placed in the test tube racks. The support seat serves as the fulcrum of the lever and can move relative to the lever along the length direction of the lever.

2. The multifunctional food safety rapid detection analyzer according to claim 1, characterized in that: The support seat comprises a sliding sleeve sleeved on the lever, a triangular plate hinged to the lower part of the sliding sleeve, and a plurality of rollers arranged on the lower part of the triangular plate.

3. The multifunctional food safety rapid detection analyzer according to claim 2, characterized in that: The support seat is pushed to move relative to the lever by a driving mechanism, which includes a first electric push rod. The front end of the telescopic rod of the first electric push rod is connected to the triangle plate, and a clamp is fixed on the shell of the first electric push rod for clamping the lever.

4. The multifunctional food safety rapid detection analyzer according to claim 1, characterized in that: A high-pressure gas nozzle is provided at the crushing inlet, and the high-pressure gas nozzle is connected to the gas source through a hose. The airflow sprayed by the high-pressure gas nozzle completely covers the crushing inlet.

5. The multifunctional food safety rapid detection analyzer according to claim 4, characterized in that: The high-pressure gas nozzle is installed below the bottom plate to move horizontally with the bottom plate.

6. The multifunctional food safety rapid detection analyzer according to claim 1, characterized in that: The base plate is driven by a second electric push rod to reciprocate in a horizontal direction.

7. The multifunctional food safety rapid detection analyzer according to claim 1, characterized in that: A conical surface is provided in a section of the separation bin corresponding to the feed port to encourage solid or liquid materials to flow along the conical surface toward the filter cartridge.

8. A solid-liquid ratio sampling method using the multifunctional food safety rapid detection analyzer according to any one of claims 1 to 7, characterized in that: The following steps are involved: S10, weighing the fruits and vegetables to be tested, placing the fruits and vegetables to be tested on the bottom plate of the upper hopper, and weighing their weight using a weighing sensor, which is recorded as M0; S20, crushing the fruits and vegetables to be tested, horizontally moving the bottom plate to open the lower opening of the upper hopper, so that the fruits and vegetables to be tested on the bottom plate enter the crushing inlet of the crusher for crushing; S30, performing solid-liquid separation on the crushed fruit and vegetable materials. The fruit and vegetable crushed materials enter the feed port of the spiral extrusion solid-liquid separator, and are unidirectionally extruded by the rotating spiral extrusion plate. The liquid material is filtered by the filter cartridge and flows into the liquid storage tank from the liquid outlet. The solid material can be discharged into the solid storage tank by opening the slag outlet; S40, weighing the liquid material. After all the liquid material flows out of the liquid outlet, the weight of the liquid material in the liquid storage barrel is weighed on a weighing platform, recorded as M1, and the theoretical solid-liquid ratio K0 is calculated by (M0-M1) / M1; S50, adjusting the support point position of the lever mechanism, keeping the lever position fixed, and adjusting the position of the support base relative to the lever. The distance between the support base and one end of the liquid test tube is recorded as L1, and the distance between the support base and one end of the solid test tube is recorded as L2, so that L1 / L2=K0; S60, solid and liquid are sampled separately, the first stop valve is opened to allow the liquid material in the liquid storage barrel to flow into the liquid test tube through the liquid outlet, and the first stop valve is closed when the set amount is reached. The second stop valve is opened to allow the solid material in the solid storage barrel to fall into the solid test tube, and the second stop valve is closed when the lever is horizontal, completing the sampling.

9. The solid-liquid constant ratio sampling method according to claim 8, characterized in that: The position of the support seat relative to the lever is changed by a driving mechanism, the driving mechanism includes a first electric push rod, the front end of the telescopic rod of the first electric push rod is connected to the support seat, and a clamp is fixed on the shell of the first electric push rod, and the lever is clamped by the clamp to fix the lever.

10. The solid-liquid constant ratio sampling method according to claim 8, characterized in that: During the crushing process of the fruits and vegetables to be tested, a high-pressure gas nozzle is set at the crushing inlet to spray high-pressure airflow from top to bottom into the crusher to reduce the residue of fruit and vegetable crushed materials on the crusher.

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