Layered sampling device for food detection

Abstract

The invention relates to the technical field of food sampling, in particular to a layered sampling device for food detection, which comprises a pressing plate, a base, two side plates, a sampling mechanism, an opening and closing control mechanism, a driving mechanism and a position adjusting mechanism, a central sliding rod is arranged between the side plates, and the bottom end of the central sliding rod is fixedly connected with the base. When a sampling mechanism reaches a designated position through an opening and closing control mechanism, a connecting frame drives four vertically-distributed driving sliding plates to move through upward movement of a driving rack, so that every two cut-off plates are inserted into food, then when a second gear is engaged with a first rack, the two cut-off plates get close to each other, and therefore the food is peeled off; according to the food sampling device, the food sampling amount is effectively guaranteed, the sampling leakproofness and accuracy are guaranteed, food at other positions cannot be mixed into the food sampling device, and the indentation plate automatically pushes out a sample under the action of the reset spring, so that the sample is prevented from being clamped in the sampling head.

Description

Technical Field

[0001] The invention relates to the technical field of food sampling, and in particular to a layered sampling device for food detection. Background Art

[0002] Food sampling and testing is to ensure the safety, hygiene and quality of food in order to protect the health and rights of consumers. The content of each ingredient in the food can be determined through analysis of the ingredients in the food, thus ensuring the health of consumers and the quality of the food.

[0003] The patent with authorization announcement number CN118243440B discloses a layered sampling device for food testing, including a placement seat and a movable plate on the upper side thereof, a plurality of sampling components for sampling samples are arranged between the placement seat and the movable plate, the sampling components include a sampling rod for piercing food and a sampling groove provided inside the sampling rod, and the driving component includes a driving rod rotatably mounted on the upper side of the placement seat and a movable block sleeved on the outside of the driving rod.

[0004] However, the above-mentioned stratified sampling device for food testing still has some shortcomings in actual use: 1. Paragraph

[0043] of the specification states that “the rotation of the sampling rod 201 can cause the sampling hole 203 on its surface to rotate. Since the sampling hole 203 is not in the same straight line as the central axis of the sampling rod 201, the position of the sampling hole 203 will change with the rotation of the sampling rod 201. Since the sampling end of the sampling rod 201 is flat, the channel formed when it penetrates into the food is also flat. When the position of the sampling hole 203 changes due to the rotation, the part around the channel will be squeezed and deformed again, and the sampling hole 203 will be deformed. 03 will squeeze the sealing plate 205 so that the sealing plate 205 is opened. The food residue or moisture in the opened sealing plate 205 can enter the sampling slot 202. The above sampling method is that the sampling rod 201 rotates in the food so that the food is squeezed and enters the sampling slot 202 from the sampling hole 203. However, since the cross section of the sampling rod 201 is wider than the shaft connected to it, the food residue is likely to be squeezed out along the food sampling port, and it is impossible to ensure that enough samples can be obtained in the sampling slot 202.

[0005] 2. Paragraph

[0045] of the specification states that "the food around the passage no longer squeezes the sealing plate 205. At this time, the sealing plate 205 can move to the initial position under the action of the squeezing spring 206 and block the sampling hole 203, thereby preventing food in other positions from entering the sampling slot 202 during the removal of the sampling rod 201." The squeezing spring 206 is very likely to push out the food residues, and there is no clear structure that can keep the food residues in the sampling slot 202.

[0006] 3. Paragraph

[0045] of the specification states that “open the valve 207 at the lower side of the sampling slot 202 to take out the sample”. Food residues are left in the sampling slot 202, and there is no clear structure to ensure that the food residues can be discharged from the valve 207. It can be seen from the sampling hole 203 that the food residues taken out should be linear, and linear food residues lying across the valve 207 cannot be taken out;

[0007] 4. The above-mentioned layered sampling device for food testing cannot be disassembled and cleaned after sampling, and juice is easily left and bacteria are bred. Therefore, a layered sampling device for food testing is proposed to solve the above-mentioned problems. Summary of the invention

[0008] The purpose of the present invention is to solve the problems in the background technology and to propose a layered sampling device for food testing.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A layered sampling device for food testing, comprising a pressing plate, a base and two side plates, the two side plates are fixedly connected to the base, the two side plates are symmetrically distributed, wherein the top outer wall of the side plate is fixedly connected to a bracket, the bottom of the bracket is fixedly connected to a second telescopic rod, the end of the second telescopic rod is fixedly connected to the pressing plate, the pressing plate is slidably connected to the side wall of the side plate, the top of the side plate is fixedly connected to a second button, the second button is electrically connected to the second telescopic rod, the side wall of the other side plate is fixedly connected to a scale, the outer wall of the base is fixedly connected to a support, the outer wall of the support is fixedly connected to a first telescopic rod, the outer wall of the support is fixedly connected to a first button, a central sliding rod is arranged between the side plates, the bottom end of the central sliding rod is fixedly connected to the base, and further comprising:

[0011] Sampling mechanism, used to take samples of food;

[0012] An opening and closing control mechanism, used to drive the sampling mechanism to release the sealed state and perform sampling when reaching the sampling position;

[0013] A driving mechanism, used for driving the opening and closing control mechanism and the sampling mechanism to move positions;

[0014] and a position adjustment mechanism for adjusting the height of the opening and closing control mechanism and the sampling mechanism to facilitate sampling at different positions;

[0015] The position adjustment mechanism is installed on the central sliding rod, the driving mechanism is installed on the support, the opening and closing control mechanism is installed on the position adjustment mechanism, and the sampling mechanism is installed on the opening and closing control mechanism.

[0016] Preferably, the driving mechanism includes a telescopic rod 1, a sliding frame, a driving rack, a mounting slide and two side slide rails, the telescopic rod 1 is fixedly connected to the support, the button 1 is electrically connected to the telescopic rod 1, the sliding frame is fixedly connected to the telescopic rod 1, the sliding frame is slidably connected to the two side panels, the two side slide rails are symmetrically distributed, both side slide rails are fixedly connected to the sliding frame, the mounting slide is slidably connected to one of the side slide rails, and the driving rack is slidably connected to the mounting slide.

[0017] Preferably, the position adjustment mechanism includes a threaded knob, a sliding block, a rubber ring, a pad, a limit column and a second threaded rod, the sliding block is slidably connected to the center sliding rod, the second threaded rod is fixedly connected to the sliding block, the threaded knob is threadedly connected to the second threaded rod, the pad is fixedly connected to the threaded knob, the rubber ring is fixedly connected to the pad, and the limit column is fixedly connected to the sliding block.

[0018] Preferably, the opening and closing control mechanism includes a mounting rod, a first gear, a second shaft rod and two first sliding rods, the second shaft rod is rotatably connected to the inner wall of the mounting rod, the first gear is fixedly connected to the second shaft rod, the first gear is meshed with the driving rack, the second shaft rod is sleeved on the outer wall of the limiting column, the two first sliding rods are fixed on both sides of the mounting rod, and the two ends of the two first sliding rods away from the mounting rod are respectively slidably connected to the two side slide rails.

[0019] Preferably, the opening and closing control mechanism also includes a first shaft rod, a threaded column, a connecting frame, a threaded rod 1 and a connecting ring, the first shaft rod is slidingly connected to the second shaft rod, the threaded rod 1 is fixedly connected to the first shaft rod, the threaded column is fixedly connected to the inner wall of the mounting rod, the threaded column is threadedly connected to the threaded rod 1, the connecting ring is rotatably connected to the threaded column, and the connecting frame is fixedly connected to the threaded column.

[0020] Preferably, the sampling mechanism includes a sampling head, two return springs, two sampling chambers and two retraction plates. The sampling head is fixedly connected to the mounting rod. The two sampling chambers are both opened on the sampling head. The two retraction plates are respectively slidably connected to the inner walls on both sides of the sampling head through the two sampling chambers. The two return springs are respectively fixedly connected between the two retraction plates and the sampling head.

[0021] Preferably, two driving slides are fixedly connected to both ends of the connecting frame and are symmetrically distributed in the upper and lower parts, each driving slide is slidably connected to the sampling head, the inner wall of each driving slide is provided with a slide groove 1, the inner wall of each slide groove 1 is slidably connected to a second slide rod, the outer wall of each second slide rod is fixedly connected to a slider 2, the inner wall of each slider 2 is rotatably connected to a third shaft rod, the outer wall of each third shaft rod is fixedly connected to a cut-off plate, each cut-off plate is slidably connected to the sampling head, and each slider 2 is slidably connected to the sampling head.

[0022] Preferably, the outer wall of one end of each third shaft rod away from the slider 2 is rotatably connected to the slider 3, each slider 3 is slidably connected to the sampling head, the end of each third shaft rod is fixedly connected to the second gear, and the inner wall of the sampling head is fixedly connected to four racks 1, and the four racks 1 are respectively meshed with the four second gears.

[0023] Compared with the existing technology, the present invention has the following beneficial effects:

[0024] The present invention uses an opening and closing control mechanism to make the sampling mechanism reach a specified position. By driving the rack to move upward, the connecting frame drives four driving slides distributed up and down to move so that every two cut-off plates are inserted into the food. Then, when the second gear is meshed with the rack, the two cut-off plates are close to each other, so that the food is peeled off, effectively ensuring the amount of food sampling, ensuring the airtightness and accuracy of the sampling, and no food in other positions will be mixed in. The retracted plate is acted on by a reset spring to automatically push out the sample to avoid the sample being stuck in the sampling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the side plate of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the sliding block and the central sliding rod of the present invention;

[0028] Figure 4 The present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0029] Figure 5 It is a schematic diagram of the structure of the position adjustment mechanism of the present invention;

[0030] Figure 6 is a schematic diagram of the internal structure of the second shaft rod of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of the sampling head of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the sampling mechanism of the present invention;

[0033] Fig. 9 The present invention Figure 8 A schematic diagram of the partially enlarged structure at B in the middle;

[0034] Fig.10 The present invention Figure 8 A schematic diagram of the partially enlarged structure at C in the middle;

[0035] Fig.11It is a structural schematic diagram of the installation of the slide plate and the side slide rail of the present invention.

[0036] In the figure: 1, pressing plate; 2, base; 3, side plate; 4, scale; 5, support; 6, button 1; 7, telescopic rod 1; 8, threaded knob; 9, sliding frame; 10, center slide bar; 11, button 2; 12, telescopic rod 2; 13, bracket; 14, mounting rod; 15, sampling head; 16, sliding block; 17, retracting plate; 18, side slide rail; 19, first slide bar; 20, driving rack; 21, mounting slide plate; 22, rubber ring; 23, pad; 24, limit column; 25, first gear; 26 , first shaft; 27, second shaft; 28, threaded column; 29, connecting frame; 30, threaded rod two; 31, threaded rod one; 32, connecting ring; 33, cut-off plate; 34, return spring; 35, sampling chamber; 36, driving slide; 37, slide groove one; 38, second slide rod; 39, slide block two; 40, rack one; 41, slide block three; 42, third shaft; 43, second gear; 101, position adjustment mechanism; 202, opening and closing control mechanism; 303, sampling mechanism; 404, driving mechanism. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Reference Figure 1-Figure 11 A layered sampling device for food testing comprises a pressing plate 1, a base 2 and two side plates 3, the two side plates 3 are fixedly connected to the base 2, and the two side plates 3 are symmetrically distributed, wherein the top outer wall of the side plate 3 is fixedly connected with a bracket 13, the bottom of the bracket 13 is fixedly connected with a telescopic rod 12, the end of the telescopic rod 12 is fixedly connected to the pressing plate 1, the pressing plate 1 is slidably connected to the side wall of the side plate 3, the top of the side plate 3 is fixedly connected with a button 11, the button 11 is electrically connected to the telescopic rod 12, the side wall of the other side plate 3 is fixedly connected with a scale 4, the outer wall of the base 2 is fixedly connected with a support 5, the outer wall of the support 5 is fixedly connected with a telescopic rod 7, the outer wall of the support 5 is fixedly connected with a button 6, a central sliding rod 10 is arranged between the side plates 3, and the bottom end of the central sliding rod 10 is fixedly connected to the base 2, and also includes:

[0040] A sampling mechanism 303, used for sampling food;

[0041] The opening and closing control mechanism 202 is used to drive the sampling mechanism 303 to release the sealed state and perform sampling when reaching the sampling position;

[0042] The driving mechanism 404 is used to drive the opening and closing control mechanism 202 and the sampling mechanism 303 to move positions;

[0043] and a position adjustment mechanism 101 for adjusting the height of the opening and closing control mechanism 202 and the sampling mechanism 303 to facilitate sampling at different positions;

[0044] The position adjustment mechanism 101 is installed on the central slide bar 10 , the driving mechanism 404 is installed on the support 5 , the opening and closing control mechanism 202 is installed on the position adjustment mechanism 101 , and the sampling mechanism 303 is installed on the opening and closing control mechanism 202 .

[0045] Among them, the driving mechanism 404 includes a telescopic rod 7, a sliding frame 9, a driving rack 20, a mounting slide 21 and two side slide rails 18. The telescopic rod 7 is fixedly connected to the support 5, the button 6 is electrically connected to the telescopic rod 7, the sliding frame 9 is fixedly connected to the telescopic rod 7, the sliding frame 9 is slidably connected to the two side panels 3, the two side slide rails 18 are symmetrically distributed, the two side slide rails 18 are fixedly connected to the sliding frame 9, the mounting slide 21 is slidably connected to one of the side slide rails 18, and the driving rack 20 is slidably connected to the mounting slide 21.

[0046] Among them, the position adjustment mechanism 101 includes a threaded knob 8, a sliding block 16, a rubber ring 22, a pad 23, a limit column 24 and a threaded rod 2 30. The sliding block 16 is slidably connected to the central sliding rod 10, the threaded rod 2 30 is fixedly connected to the sliding block 16, the threaded knob 8 is threadedly connected to the threaded rod 2 30, the pad 23 is fixedly connected to the threaded knob 8, the rubber ring 22 is fixedly connected to the pad 23, and the limit column 24 is fixedly connected to the sliding block 16.

[0047] In this embodiment, if Figure 1-Figure 5 As shown: determine the sampling position, install as many position adjustment mechanisms 101 as there are sampling positions, first slide the sliding block 16 from the top of the central slide bar 10, and slide the two first slide bars 19 along the two side slide rails 18. When reaching the specified position, tighten the threaded knob 8 so that the rubber ring 22 only squeezes the two side panels 3, and then fix the position adjustment mechanisms 101 that need to be installed in sequence.

[0048] Among them, the opening and closing control mechanism 202 includes a mounting rod 14, a first gear 25, a second shaft rod 27 and two first sliding rods 19. The second shaft rod 27 is rotatably connected to the inner wall of the mounting rod 14, the first gear 25 is fixedly connected to the second shaft rod 27, the first gear 25 is meshed with the driving rack 20, the second shaft rod 27 is sleeved on the outer wall of the limiting column 24, the two first sliding rods 19 are fixed on both sides of the mounting rod 14, and the two ends of the two first sliding rods 19 away from the mounting rod 14 are respectively slidably connected to the two side slide rails 18.

[0049] Among them, the opening and closing control mechanism 202 also includes a first shaft rod 26, a threaded column 28, a connecting frame 29, a threaded rod 31 and a connecting ring 32. The first shaft rod 26 is slidingly connected to the second shaft rod 27, the threaded rod 31 is fixedly connected to the first shaft rod 26, the threaded column 28 is fixedly connected to the inner wall of the mounting rod 14, the threaded column 28 is threadedly connected to the threaded rod 31, the connecting ring 32 is rotatably connected to the threaded column 28, and the connecting frame 29 is fixedly connected to the threaded column 28.

[0050] In this embodiment, if Figure 1 and Figure 2 As shown: place food on the base 2, press button 11 to control the extension of the telescopic rod 12, so that the pressure plate 1 moves down with the telescopic rod 12 to clamp the food and then stop, at this time the food is fixed, then press button 6 to make the telescopic rod 7 drive the sliding frame 9 to extend, the sliding frame 9 drives the two side slide rails 18 to extend, thereby driving the first slide bar 19, the mounting rod 14 and the sampling head 15 to extend, so that the sampling head 15 is inserted into the food.

[0051] When the designated position is reached, release the button 6 to stop the telescopic rod 7 from extending. Figure 6 and Fig.11 As shown, the mounting slide 21 is pushed toward the mounting rod 14, and the mounting slide 21 slides along the side slide rail 18 through the slide groove, so that the drive rack 20 engages with the first gear 25, and then the drive rack 20 is pulled upward so that the drive rack 20 moves up along the mounting slide 21 through the slide rail.

[0052] like Figure 6 and Figure 7 As shown: thereby driving the first gear 25, the second shaft 27, the first shaft 26 and the threaded rod 31 to rotate, so that the threaded rod 31 drives the first shaft 26 to slide out along the second shaft 27, thereby pushing the connecting frame 29 to move in the direction close to the sampling head 15. Before this, the sampling head 15 and the retracted plate 17 have always maintained a sealed state and no food has entered the sampling cavity 35.

[0053] Among them, the sampling mechanism 303 includes a sampling head 15, two reset springs 34, two sampling chambers 35 and two retracting plates 17. The sampling head 15 is fixedly connected to the mounting rod 14. The two sampling chambers 35 are both opened on the sampling head 15. The two retracting plates 17 are respectively slidably connected to the inner walls on both sides of the sampling head 15 through the two sampling chambers 35. The two reset springs 34 are respectively fixedly connected between the two retracting plates 17 and the sampling head 15.

[0054] Among them, two driving slides 36 symmetrically distributed in the upper and lower parts are fixedly connected to both ends of the connecting frame 29, each driving slide 36 is slidably connected to the sampling head 15, the inner wall of each driving slide 36 is provided with a slide groove 1 37, the inner wall of each slide groove 1 37 is slidably connected to the second slide rod 38, the outer wall of each second slide rod 38 is fixedly connected to a slider 2 39, the inner wall of each slider 2 39 is rotatably connected to the third shaft rod 42, the outer wall of each third shaft rod 42 is fixedly connected to a cut-off plate 33, each cut-off plate 33 is slidably connected to the sampling head 15, and each slider 2 39 is slidably connected to the sampling head 15.

[0055] Among them, the outer wall of one end of each third shaft rod 42 away from the slider two 39 is rotatably connected to the slider three 41, each slider three 41 is slidably connected to the sampling head 15, and the end of each third shaft rod 42 is fixedly connected to the second gear 43, and the inner wall of the sampling head 15 is fixedly connected to four racks one 40, and the four racks one 40 are respectively meshed with the four second gears 43.

[0056] In this embodiment, if Figure 7-10 As shown, the connecting frame 29 drives four driving slides 36 distributed up and down to move so that the second slide bar 38 slides upward along the slide groove 1 37, and the second slide bar 38 drives the slider 2 39, the slider 3 41, the third shaft 42, the second gear 43 and the cut-off plate 33 to move up and down, so that every two cut-off plates 33 are inserted into the food, and then when the second gear 43 is engaged with the rack 1 40, the two cut-off plates 33 are close to each other, so that the food is peeled off, effectively ensuring the amount of food sampling.

[0057] When the two cut-off plates 33 gradually become parallel to the upper surface of the sampling head 15, the retracted plate 17 is squeezed and inserted into the sampling head 15, and then the two cut-off plates 33 replace the position and function of the original retracted plate 17. After the sampling is completed, as long as the position of the driving rack 20 does not change, the two cut-off plates 33 will not open, thereby ensuring the airtightness and accuracy of the sampling, and no food from other positions will be mixed in.

[0058] After sampling is completed, the button 6 is pressed again to move the telescopic rod 7 backward away from the food, and the driving rack 20 can be reset to automatically open the two cut-off plates 33, and the retracting plate 17 is acted upon by the reset spring 34 to automatically push the sample out, and the entire mechanism is convenient for disassembling the mounting rod 14 and the sampling head 15 for cleaning to avoid bacterial growth.

[0059] The specific working principle and use method of the present invention are explained in detail below: When using, Figure 1-Figure 5 As shown: determine the sampling position, install as many position adjustment mechanisms 101 as there are sampling positions, first slide the sliding block 16 from the top of the central slide bar 10, and slide the two first slide bars 19 along the two side slide rails 18. When reaching the specified position, tighten the threaded knob 8 so that the rubber ring 22 only squeezes the two side panels 3, and then fix the position adjustment mechanisms 101 that need to be installed in sequence.

[0060] like Figure 1 and Figure 2 As shown: place food on the base 2, press button 11 to control the extension of the telescopic rod 12, so that the pressure plate 1 moves down with the telescopic rod 12 to clamp the food and then stop, at this time the food is fixed, then press button 6 to make the telescopic rod 7 drive the sliding frame 9 to extend, the sliding frame 9 drives the two side slide rails 18 to extend, thereby driving the first slide bar 19, the mounting rod 14 and the sampling head 15 to extend, so that the sampling head 15 is inserted into the food.

[0061] When the designated position is reached, release the button 6 to stop the telescopic rod 7 from extending. Figure 6 and Fig.11 As shown, the mounting slide 21 is pushed toward the mounting rod 14, and the mounting slide 21 slides along the side slide rail 18 through the slide groove, so that the drive rack 20 engages with the first gear 25, and then the drive rack 20 is pulled upward so that the drive rack 20 moves up along the mounting slide 21 through the slide rail.

[0062] like Figure 6 and Figure 7 As shown: thereby driving the first gear 25, the second shaft 27, the first shaft 26 and the threaded rod 31 to rotate, so that the threaded rod 31 drives the first shaft 26 to slide out along the second shaft 27, thereby pushing the connecting frame 29 to move in the direction close to the sampling head 15. Before this, the sampling head 15 and the retracted plate 17 have always maintained a sealed state and no food has entered the sampling cavity 35.

[0063] like Figure 7-10As shown, the connecting frame 29 drives four driving slides 36 distributed up and down to move so that the second slide bar 38 slides upward along the slide groove 1 37, and the second slide bar 38 drives the slider 2 39, the slider 3 41, the third shaft 42, the second gear 43 and the cut-off plate 33 to move up and down, so that every two cut-off plates 33 are inserted into the food, and then when the second gear 43 is engaged with the rack 1 40, the two cut-off plates 33 are close to each other, so that the food is peeled off, effectively ensuring the amount of food sampling.

[0064] When the two cut-off plates 33 gradually become parallel to the upper surface of the sampling head 15, the retracted plate 17 is squeezed and inserted into the sampling head 15, and then the two cut-off plates 33 replace the position and function of the original retracted plate 17. After the sampling is completed, as long as the position of the driving rack 20 does not change, the two cut-off plates 33 will not open, thereby ensuring the airtightness and accuracy of the sampling, and no food from other positions will be mixed in.

[0065] After sampling is completed, the button 6 is pressed again to move the telescopic rod 7 backward away from the food, and the driving rack 20 can be reset to automatically open the two cut-off plates 33, and the retracting plate 17 is acted upon by the reset spring 34 to automatically push the sample out, and the entire mechanism is convenient for disassembling the mounting rod 14 and the sampling head 15 for cleaning to avoid bacterial growth.

[0066] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A layered sampling device for food testing, comprising a pressing plate (1), a base (2) and two side plates (3), wherein the two side plates (3) are fixedly connected to the base (2), and the two side plates (3) are symmetrically distributed, wherein the top outer wall of the side plate (3) is fixedly connected to a bracket (13), and the bottom of the bracket (13) is fixedly connected to a second telescopic rod (12), and the end of the second telescopic rod (12) is fixedly connected to the pressing plate (1), and the pressing plate (1) is slidably connected to the side wall of the side plate (3), and the top outer wall of the side plate (3) is fixedly connected to the second telescopic rod (12). The base (2) is fixedly connected with a button 2 (11), the button 2 (11) is electrically connected to a telescopic rod 2 (12), the side wall of the other side plate (3) is fixedly connected with a scale (4), the outer wall of the base (2) is fixedly connected with a support (5), the outer wall of the support (5) is fixedly connected with a telescopic rod 1 (7), the outer wall of the support (5) is fixedly connected with a button 1 (6), a central sliding rod (10) is arranged between the side plates (3), the bottom end of the central sliding rod (10) is fixedly connected to the base (2), characterized in that: Also includes: A sampling mechanism (303) for sampling food; An opening and closing control mechanism (202) is used to drive the sampling mechanism (303) to release the sealed state and perform sampling when reaching the sampling position; A driving mechanism (404) is used to drive the opening and closing control mechanism (202) and the sampling mechanism (303) to move positions; and a position adjustment mechanism (101) for adjusting the height of the opening and closing control mechanism (202) and the sampling mechanism (303) so as to facilitate sampling at different positions; The position adjustment mechanism (101) is installed on the central sliding rod (10), the driving mechanism (404) is installed on the support (5), the opening and closing control mechanism (202) is installed on the position adjustment mechanism (101), and the sampling mechanism (303) is installed on the opening and closing control mechanism (202).

2. A stratified sampling device for food testing according to claim 1, characterized in that: The driving mechanism (404) comprises a telescopic rod (7), a sliding frame (9), a driving rack (20), a mounting slide plate (21) and two side slide rails (18); the telescopic rod (7) is fixedly connected to the support (5); the button (6) is electrically connected to the telescopic rod (7); the sliding frame (9) is fixedly connected to the telescopic rod (7); the sliding frame (9) is slidably connected to the two side panels (3); the two side slide rails (18) are symmetrically distributed; both side slide rails (18) are fixedly connected to the sliding frame (9); the mounting slide plate (21) is slidably connected to one of the side slide rails (18); and the driving rack (20) is slidably connected to the mounting slide plate (21).

3. A stratified sampling device for food testing according to claim 2, characterized in that: The position adjustment mechanism (101) comprises a threaded knob (8), a sliding block (16), a rubber ring (22), a pad (23), a limiting column (24) and a second threaded rod (30); the sliding block (16) is slidably connected to the central sliding rod (10); the second threaded rod (30) is fixedly connected to the sliding block (16); the threaded knob (8) is threadedly connected to the second threaded rod (30); the pad (23) is fixedly connected to the threaded knob (8); the rubber ring (22) is fixedly connected to the pad (23); and the limiting column (24) is fixedly connected to the sliding block (16).

4. A stratified sampling device for food testing according to claim 3, characterized in that: The opening and closing control mechanism (202) comprises a mounting rod (14), a first gear (25), a second shaft rod (27) and two first sliding rods (19); the second shaft rod (27) is rotatably connected to the inner wall of the mounting rod (14); the first gear (25) is fixedly connected to the second shaft rod (27); the first gear (25) is meshed with the driving rack (20); the second shaft rod (27) is sleeved on the outer wall of the limiting column (24); the two first sliding rods (19) are fixed on both sides of the mounting rod (14); and the two ends of the two first sliding rods (19) away from the mounting rod (14) are respectively slidably connected to the two side slide rails (18).

5. A stratified sampling device for food testing according to claim 4, characterized in that: The opening and closing control mechanism (202) also includes a first shaft rod (26), a threaded column (28), a connecting frame (29), a threaded rod one (31) and a connecting ring (32), wherein the first shaft rod (26) is slidably connected to the second shaft rod (27), the threaded rod one (31) is fixedly connected to the first shaft rod (26), the threaded column (28) is fixedly connected to the inner wall of the mounting rod (14), the threaded column (28) is threadedly connected to the threaded rod one (31), the connecting ring (32) is rotatably connected to the threaded column (28), and the connecting frame (29) is fixedly connected to the threaded column (28).

6. A stratified sampling device for food testing according to claim 5, characterized in that: The sampling mechanism (303) comprises a sampling head (15), two return springs (34), two sampling chambers (35) and two retracting plates (17); the sampling head (15) is fixedly connected to the mounting rod (14); the two sampling chambers (35) are both provided on the sampling head (15); the two retracting plates (17) are respectively slidably connected to the inner walls on both sides of the sampling head (15) through the two sampling chambers (35); and the two return springs (34) are respectively fixedly connected between the two retracting plates (17) and the sampling head (15).

7. A stratified sampling device for food testing according to claim 6, characterized in that: Two driving slides (36) symmetrically distributed in an upper and lower manner are fixedly connected to both ends of the connecting frame (29), each driving slide (36) is slidably connected to the sampling head (15), the inner wall of each driving slide (36) is provided with a slide groove (37), the inner wall of each slide groove (37) is slidably connected to a second slide bar (38), the outer wall of each second slide bar (38) is fixedly connected to a slide block (39), the inner wall of each slide block (39) is rotatably connected to a third shaft rod (42), the outer wall of each third shaft rod (42) is fixedly connected to a cut-off plate (33), each cut-off plate (33) is slidably connected to the sampling head (15), and each slide block (39) is slidably connected to the sampling head (15).

8. A stratified sampling device for food testing according to claim 7, characterized in that: The outer wall of one end of each third shaft rod (42) away from the slider two (39) is rotatably connected to the slider three (41), and each slider three (41) is slidably connected to the sampling head (15). The end of each third shaft rod (42) is fixedly connected to the second gear (43), and the inner wall of the sampling head (15) is fixedly connected to four racks one (40), and the four racks one (40) are respectively meshed with the four second gears (43).

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