Sampling and metering device for food detection
By designing a sampling and measurement device for food testing, the problems of low sampling efficiency and insufficient accuracy in the prior art are solved, and efficient and accurate sampling of different locations and levels of food are achieved, ensuring the representativeness and accuracy of the test results.
Patent Information
- Application Number
- CN202510562661.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
It is difficult for existing food testing devices to achieve efficient and accurate multi-layer simultaneous sampling of foods of different depths during sampling, resulting in insufficient representation and accuracy of the test results.
A sampling and metering device for food testing is designed, including a sampling mandrel and a number of removable sampling components. The linkage between the intermediate rod and the sampling component is realized through the connecting rod mechanism, combining the locking mechanism and the adjustment plate to achieve simultaneous sampling of different positions and levels of food, and to ensure accurate control of the sampling volume through volume scales and height scales.
It realizes multi-layer simultaneous sampling of food, improves sampling efficiency and accuracy, ensures the representativeness and accuracy of sampling results, is convenient and fast to install, and has strong versatility.
Smart Images
Figure CN120507174A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sampling and detection, and in particular to a sampling and metering device for food detection. Background Art
[0002] With the development of society and the improvement of people's living standards, people pay more and more attention to food safety. Therefore, it is necessary to conduct food safety testing. Food safety testing is to detect harmful substances in food according to national indicators, mainly some harmful and toxic indicators, such as heavy metals, aflatoxins, etc. When conducting food safety testing, it is necessary to sample the food. The purpose is to extract a representative sample from a large amount of food in order to analyze its composition, quality, safety or whether it meets relevant standards. Scientific sampling can ensure the representativeness and accuracy of the test results.
[0003] Due to the wide variety of food, sampling devices are also different. When sampling granular food, if sampling and testing is performed on its surface, it is easy to lead to non-representative testing. If sampling food at different depths, it is often necessary to remove the upper layer of food, resulting in low sampling efficiency. Or tools can be used to insert samples into the food multiple times for sampling, but the depth of each insertion cannot be guaranteed. The process of removing the tool is also easy to cause sample confusion, and simultaneous sampling of multiple layers cannot be achieved. In addition, the measurement taken each time is different, resulting in the inaccurate sampling amount of the food to be tested, and the sampling results are not representative and accurate.
[0004] Therefore, it is necessary to propose a sampling and metering device for food testing to overcome the defects of the prior art. Summary of the Invention
[0005] The purpose of the present invention is to solve the problems in the prior art and provide a sampling and metering device for food testing.
[0006] The technical solution of the present invention is: A sampling and metering device for food testing includes a sampling core rod, an intermediate rod and a sampling assembly. The intermediate rod is inserted into the sampling core rod and can slide relative to the sampling core rod. The sampling assembly is provided in multiple numbers, and the multiple sampling assemblies are arranged on the sampling core rod at intervals. The sampling assembly and the sampling core rod are detachably connected. The intermediate rod and the sampling assembly are connected by a connecting rod mechanism to realize the linkage between the intermediate rod and the sampling assembly. Symmetrically distributed slots are provided on the circumference of the sampling core rod.
[0007] Preferably, the sampling assembly includes two sampling cylinders, one side of the two sampling cylinders is hinged, and the other side of the two sampling cylinders is connected by a locking mechanism. A cylinder cover is slidingly provided on the top of the sampling cylinder for closing or opening the sampling cylinder. An adjustment plate and a screw are provided inside the sampling cylinder. The screw is rotatably connected to the sampling cylinder, and the screw is threadedly connected to the adjustment plate for driving the adjustment plate to rise and fall in the sampling cylinder to adjust the volume of the sampling cylinder.
[0008] Preferably, one end of the lead screw passes downward through and extends outside the sampling cylinder, a driving bevel gear is fixedly provided at the end of the lead screw, and a driving shaft one and a driving shaft two are rotatably provided at the bottom of the two sampling cylinders respectively, and a driven bevel gear is provided on each of the drive shafts one and two, and the driven bevel gear is meshed with the driving bevel gear one by one, and a tenon is provided at one end of the drive shaft one, and a mortise is provided at one end of the drive shaft two.
[0009] Preferably, the locking mechanism includes a wrench, a screw and a locking nut. A locking fork block is provided on the side wall of the sampling barrel away from the hinged side. The locking nut is hinged to the locking fork block of one of the sampling barrels. One end of the screw is threadedly connected to the locking nut, and the wrench is eccentrically connected to the other end of the screw.
[0010] Preferably, a transparent observation window is provided on one side wall of the sampling tube, and a volume scale line is provided on the side wall of the sampling tube and located on one side of the transparent observation window.
[0011] Preferably, the connecting rod mechanism includes connecting rod one and connecting rod two, one end of connecting rod one is hinged to the cylinder cover, the other end of connecting rod one is plugged into one end of connecting rod two, the other end of connecting rod two is detachably connected to the middle rod through the slot, and a locking handle is provided at the end of connecting rod one plugged into connecting rod two.
[0012] Preferably, symmetrically distributed long countersunk holes are provided on the circumference of the middle rod, spring plungers evenly distributed along the axial direction of the middle rod are provided on both side walls of the long countersunk holes, and positioning holes adapted to the spring plungers are provided at both ends of the connecting rod.
[0013] Preferably, a return spring is provided inside the sampling core rod, and the return spring abuts against the middle rod.
[0014] Preferably, a conical head is provided at one end of the sampling mandrel, an operating handle is provided at the other end of the sampling mandrel, and height scale lines are provided on the circumferential outer wall of the sampling mandrel.
[0015] Preferably, an arc-shaped groove is provided on the sampling tube, and a flexible pad is provided on the inner wall of the arc-shaped groove.
[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention installs multiple sampling components on the sampling core rod, and the installation positions of the multiple sampling components can be adjusted arbitrarily, so as to realize simultaneous sampling operations of different positions and different layers of food. The sampling is completed by pressing the middle rod to drive the barrel cover to open or close, thereby improving the sampling efficiency and ensuring the accuracy of the sampling results. The sampling component adopts two hinged sampling barrels and is locked on the sampling core rod through a locking mechanism. The installation is convenient and fast. The sampling volume of the sampling barrel is adjusted by setting an adjustment plate in the sampling barrel. The versatility and flexibility are strong. The volume of the sampling barrel and the installation height of the sampling component can be intuitively read through the volume scale line and the height scale line, thereby realizing quantitative sampling of the food to be tested and ensuring the representativeness and accuracy of the sampling results. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A local enlarged structural diagram of point A; Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at point B; Figure 4 Schematic diagram of the sampling component structure of the present invention Figure 1 ; Figure 5 Schematic diagram of the sampling component structure of the present invention Figure 2 ; Figure 6 This is a schematic diagram of the structure of the intermediate rod of the present invention; Figure 7 It is a schematic structural diagram of the connecting rod 2 of the present invention.
[0018] Among them, 1. Sampling core rod; 2. Middle rod; 3. Slot hole; 4. Sampling tube; 5. Tube cover; 6. Adjustment plate; 7. Screw; 8. Active bevel gear; 9. Drive shaft 1; 10. Drive shaft 2; 11. Driven bevel gear; 12. Tenon; 13. Mortise; 14. Wrench; 15. Screw; 16. Locking nut; 17. Locking fork block; 18. Transparent observation window; 19. Volume scale line; 20. Connecting rod 1; 21. Connecting rod 2; 22. Locking handle; 23. Long countersunk hole; 24. Spring plunger; 25. Positioning hole; 26. Return spring; 27. Conical head; 28. Operating handle; 29. Height scale line; 30. Arc groove; 31. Flexible pad. DETAILED DESCRIPTION
[0019] In order to make the technical means, technical features, invention objectives and technical effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.
[0020] like Figure 1-Figure 7As shown, a sampling and metering device for food testing includes a sampling core rod 1, an intermediate rod 2, a sampling assembly and a connecting rod mechanism. The sampling core rod 1 is processed into an internal hollow structure, and the intermediate rod 2 is inserted and connected to the inside of the sampling core rod 1. The intermediate rod 2 can move along the axial direction of the sampling core rod 1. The sampling assembly is detachably connected to the sampling core rod 1. The number of sampling assemblies can be multiple. The installation position and installation quantity of the sampling assembly on the sampling core rod 1 can be adjusted according to the need of sampling different positions of food. The connecting rod mechanism is connected between the sampling assembly and the intermediate rod 2. The intermediate rod 2 moves relative to the sampling core rod 1, and the sampling assembly is driven by the connecting rod mechanism to realize sampling and metering.
[0021] like Figure 1-Figure 5 As shown, the sampling assembly includes a sampling tube 4, a tube cover 5 and an adjustment plate 6. There are two sampling tubes 4. One side of the two sampling tubes 4 is hinged by a hinge, and the other side of the two sampling tubes 4 is connected by a locking mechanism. The side walls of the two sampling tubes 4 that are relatively close to each other are processed with arc grooves 30. The specifications of the arc grooves 30 are adapted to the sampling core rod 1. When installed, the two hinged sampling tubes 4 are clamped on the sampling core rod 1 by the arc grooves 30, and the position of the sampling tube 4 relative to the sampling core rod 1 is locked by the locking mechanism. In order to enhance the stability of the sampling tube 4 installed on the sampling core rod 1, a flexible pad 31 is bonded to the inner side wall of the arc groove 30. When the locking mechanism locks the two sampling tubes 4, the flexible pad 31 can be deformed to increase the friction and pressing force between the sampling tube 4 and the sampling core rod 1; The cylinder cover 5 is installed on the top of the sampling cylinder 4. Specifically, the cylinder cover 5 and the intermediate rod 2 are linked by a connecting rod mechanism, and the movement of the intermediate rod 2 relative to the sampling core rod 1 can be converted into the sliding of the cylinder cover 5 relative to the sampling cylinder 4. The cylinder cover 5 slides to close or open the sampling cylinder 4. In order to ensure that the cylinder cover 5 slides stably and reliably relative to the sampling cylinder 4, a limiting groove can be machined on the sampling cylinder 4 to limit and guide the cylinder cover 5. The adjusting plate 6 and the lead screw 7 are installed inside the sampling tube 4. The adjusting plate 6 is threadedly connected to the lead screw 7. The lead screw 7 can rotate relative to the sampling tube 4. The rotation of the lead screw 7 drives the adjusting plate 6 to move up and down inside the sampling tube 4. The internal volume of the sampling tube 4 is adjusted by the lifting and lowering of the adjusting plate 6. The quantitative measurement of food samples can be achieved as needed. In order to facilitate the observation of the position of the adjusting plate 6 from the outside, a transparent observation window 18 is installed on one side wall of the sampling tube 4. On the side wall where the transparent observation window 18 is located, and next to the transparent observation window 18, a volume scale line 19 is processed. It can intuitively display the internal capacity of the sampling tube 4 corresponding to different positions of the adjusting plate 6, and the observation is clear and convenient. The lower end of the lead screw 7 penetrates downwardly through the sampling cylinder 4 and extends to the outside of the sampling cylinder 4. A driving bevel gear 8 is fixedly connected to the end of the lead screw 7 located outside the sampling cylinder 4. A driving shaft 1 9 and a driving shaft 2 10 are respectively installed at the bottom of the two sampling cylinders 4. The driving shaft 1 9 and the driving shaft 2 10 are respectively connected to the two sampling cylinders 4 through bearing seats, and can realize rotation relative to the sampling cylinder 4. A driven bevel gear 11 is fixedly installed on the driving shaft 1 9 and the driving shaft 2 10. The two driven bevel gears 11 are meshed with the two driving bevel gears 8 in a one-to-one correspondence. By rotating the driving shaft 1 9 and / or the driving shaft 2 10, as well as the driving The meshing of the bevel gear 8 and the driven bevel gear 11 drives the lead screw 7 to rotate, thereby realizing the lifting and lowering of the adjustment plate 6. Since the two sampling cylinders 4 are connected in a split hinged manner, in order to realize the synchronous movement of the adjustment plates 6 in the two sampling cylinders 4, a tenon 12 is processed at one end of the drive shaft 1 9, and a mortise 13 is processed at one end of the drive shaft 2 10. When the two sampling cylinders 4 are closed, the tenon 12 can be correspondingly inserted into the mortise 13, and the rotation of the drive shaft 1 9 or the drive shaft 2 10 can drive the drive shaft 2 10 or the drive shaft 1 9 to rotate synchronously, thereby realizing the synchronous movement of the adjustment plates 6 in the two sampling cylinders 4; The locking mechanism includes a wrench 14, a screw 15 and a locking nut 16. The sampling barrel 4 is connected to a locking fork block 17 on the side wall away from the hinge. The locking nut 16 is hinged to the locking fork block 17 of one of the sampling barrels 4. One end of the screw 15 is threadedly connected to the locking nut 16. The wrench 14 is eccentrically connected to the other end of the screw 15. The screw 15 is rotated to make it clamped on the locking fork block 17 of the other sampling barrel 4. The eccentrically connected wrench 14 can be rotated to achieve the connection and locking of the two sampling barrels 4 on the sampling core rod 1.
[0022] like Figure 1 As shown, two slots 3 are processed on the circumference of the sampling core rod 1, and the two slots 3 are symmetrically distributed. Two long countersunk holes 23 are processed on the circumference of the intermediate rod 2. After the intermediate rod 2 is installed in the sampling core rod 1, the long countersunk holes 23 correspond to the slots 3 one by one, which is convenient for the installation and connection of the connecting rod mechanism. Multiple spring plungers 24 are installed on both side walls of the long countersunk holes 23. The multiple spring plungers 24 on each side are evenly distributed along the axial direction of the intermediate rod 2, which is used for quick connection and disassembly of the connecting rod mechanism.
[0023] like Figure 1 、 Figure 2 and Figure 7As shown, the connecting rod mechanism includes a connecting rod 20 and a connecting rod 21. One end of the connecting rod 20 is hinged to the cylinder cover 5, and the inner middle of the connecting rod 20 is convenient for plugging in the connecting rod 21. The plug-in connection method is adopted, which can realize the adjustment of the installation distance of the connecting rod 21 relative to the connecting rod 20, and adjust the overall length. The connecting rod 20 is connected with a locking handle 22 at the end connected to the connecting rod 21. When adjusted to the right position, the position of the connecting rod 21 on the connecting rod 20 is locked by tightening the locking handle 22. The end of the connecting rod 21 away from the plug-in end is processed with a positioning hole 25, which passes through the slot 3 and is connected to the spring plunger 24 on the intermediate rod 2. When the installation position of the sampling cylinder 4 changes, the installation distance of the connecting rod 21 relative to the connecting rod 1 20 is adjusted to facilitate the connection of the connecting rod 21 with the spring plunger 24 at the appropriate position.
[0024] like Figure 1 As shown, a reset spring 26 is installed at the lower end of the inner part of the sampling core rod 1. The reset spring 26 abuts between the sampling core rod 1 and the middle rod 2. During use, the middle rod 2 is pushed downward to compress the reset spring 26, and the pressure on the middle rod 2 is released. The reset spring 26 can drive the middle rod 2 to move upward and reset.
[0025] like Figure 1 As shown, a conical head 27 is processed at one end of the sampling core rod 1. The conical structure can reduce the contact area, making it easier to insert into food and achieving a labor-saving effect. An operating handle 28 is installed at the other end of the sampling core rod 1. The sampling core rod 1 can be conveniently inserted or pulled out by operating the handle 28. A height scale line 29 is processed on the circumferential outer wall of the sampling core rod 1, which can intuitively observe and adjust the installation position of the sampling tube 4.
[0026] The working principle of the present invention is: The sampling tube 4 is installed on the sampling mandrel 1 according to the depth of the food to be sampled. During installation, the two hinged sampling tubes 4 clamp the sampling mandrel 1 through the arc groove 30, and the screw 15 is rotated to clamp the locking fork 17 through the eccentrically connected wrench 14 to complete the installation of the sampling tube 4 on the sampling mandrel 1. The installation position of the sampling tube 4 is intuitively determined according to the height scale line 29 on the sampling mandrel 1. At this time, the tenon 12 of the drive shaft 1 9 is inserted into the mortise 13 of the drive shaft 2 10, and the drive shaft 1 9 or the drive shaft 2 10 is rotated to rotate the screw 7, driving the adjustment plate 6 to rise and fall in the sampling tube 4, adjusting the volume in each sampling tube 4 to half of the amount of food to be sampled. The volume in each sampling tube 4 can be intuitively read through the volume scale line 19 on the side wall of the sampling tube 4, loosening the locking handle 22, and the connecting rod 2 21 is extended and retracted relative to the connecting rod 1 20, so that the end of the connecting rod 21 passes through the slot 3 and is connected to the spring of the elongated countersunk hole 23 The sampling tube 4 is then driven by the sampling core rod 1 to be taken out of the food, and the sampling core rod 1 is taken out of the food, and the sampling process is completed.
[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application of the present invention should fall within the technical scope of the present invention.
Claims
1. A sampling and metering device for food testing, characterized in that: The invention comprises a sampling core rod (1), an intermediate rod (2) and a sampling assembly, wherein the intermediate rod (2) is inserted into the interior of the sampling core rod (1), and the intermediate rod (2) can slide relative to the sampling core rod (1). The sampling assembly is provided in plurality, and the plurality of sampling assemblies are arranged on the sampling core rod (1) at intervals. The sampling assembly is detachably connected to the sampling core rod (1), and the intermediate rod (2) and the sampling assembly are connected via a connecting rod mechanism to realize the linkage between the intermediate rod (2) and the sampling assembly. The sampling core rod (1) is provided with symmetrically distributed slots (3) on its circumference.
2. The food testing sampling and measuring device according to claim 1, characterized in that: The sampling assembly comprises two sampling barrels (4), one side of the two sampling barrels (4) is hinged, and the other side of the two sampling barrels (4) is connected by a locking mechanism, and a barrel cover (5) is slidably provided on the top of the sampling barrel (4) for closing or opening the sampling barrel (4), and an adjusting plate (6) and a lead screw (7) are provided inside the sampling barrel (4), and the lead screw (7) is rotatably connected to the sampling barrel (4), and the lead screw (7) is threadedly connected to the adjusting plate (6) for driving the adjusting plate (6) to rise and fall in the sampling barrel (4) to adjust the volume of the sampling barrel (4).
3. The food testing sampling and measuring device according to claim 2, characterized in that: One end of the lead screw (7) passes through downward and extends to the outside of the sampling cylinder (4), and a driving bevel gear (8) is fixedly provided at the end of the lead screw (7). A driving shaft 1 (9) and a driving shaft 2 (10) are rotatably provided at the bottom of the two sampling cylinders (4), and a driven bevel gear (11) is provided on each of the driving shaft 1 (9) and the driving shaft 2 (10). The driven bevel gear (11) is meshed with the driving bevel gear (8) in a one-to-one correspondence. A tenon (12) is provided at one end of the driving shaft 1 (9), and a mortise (13) is provided at one end of the driving shaft 2 (10).
4. The food testing sampling and measuring device according to claim 2, characterized in that: The locking mechanism comprises a wrench (14), a screw (15) and a locking nut (16); a locking fork block (17) is provided on the side wall of the sampling cylinder (4) away from the hinged side; the locking nut (16) is hinged on the locking fork block (17) of one of the sampling cylinders (4); one end of the screw (15) is threadedly connected to the locking nut (16); and the wrench (14) is eccentrically connected to the other end of the screw (15).
5. The food testing sampling and measuring device according to claim 2, characterized in that: A transparent observation window (18) is provided on one side wall of the sampling cylinder (4), and a volume scale line (19) is provided on the side wall of the sampling cylinder (4) and located on one side of the transparent observation window (18).
6. The food testing sampling and measuring device according to claim 1, characterized in that: The connecting rod mechanism comprises a connecting rod 1 (20) and a connecting rod 2 (21), one end of the connecting rod 1 (20) is hinged to the cylinder cover (5), the other end of the connecting rod 1 (20) is plugged into one end of the connecting rod 2 (21), the other end of the connecting rod 2 (21) passes through the slot (3) and is detachably connected to the intermediate rod (2), and a locking handle (22) is provided at the end of the connecting rod 1 (20) plugged into the connecting rod 2 (21).
7. The food testing sampling and measuring device according to claim 6, characterized in that: The intermediate rod (2) is provided with symmetrically distributed long countersunk holes (23) on its circumference, and spring plungers (24) are provided on both side walls of the long countersunk holes (23) and are evenly distributed along the axial direction of the intermediate rod (2). Positioning holes (25) adapted to the spring plungers (24) are provided at the ends of the second connecting rod (21).
8. The food testing sampling and measuring device according to claim 1, characterized in that: A return spring (26) is provided inside the sampling core rod (1), and the return spring (26) abuts against the intermediate rod (2).
9. The food testing sampling and measuring device according to claim 1, characterized in that: A conical head (27) is provided at one end of the sampling core rod (1), an operating handle (28) is provided at the other end of the sampling core rod (1), and a height scale line (29) is provided on the circumferential outer wall of the sampling core rod (1).
10. The food testing sampling and measuring device according to claim 2, characterized in that: An arc-shaped groove (30) is provided on the sampling cylinder (4), and a flexible pad (31) is provided on the inner wall of the arc-shaped groove (30).