Food quality detection device
The test tube is automatically clamped and rotated by a gear and rack mechanism driven by a motor, which solves the problem of laborious and ineffective sample mixing in existing food testing, and realizes efficient and automated sample mixing, thereby improving testing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI ZHONGQING INSPECTION & DETECTION CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-15
AI Technical Summary
In current food testing, mixing samples is laborious and ineffective, especially the mixing of acetylcholinesterase and indophenol acetate substrates, which requires manual shaking, resulting in low efficiency.
Design a food quality testing device that uses a motor-driven gear and rack mechanism to automatically clamp test tubes and achieve uniform mixing of samples by rotating a mixing tank. The device includes a first motor driving a transmission gear and an internal gear, the internal gear driving a connecting gear and a rack, a clamping block fixing the test tubes, and a second motor driving the mixing tank to rotate the sample.
It achieves efficient and automated sample mixing, reduces the burden of manual operation, and improves mixing effect and detection efficiency.
Smart Images
Figure CN224247586U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food quality testing technology, specifically a food quality testing device. Background Technology
[0002] In a broad sense, food inspection refers to a discipline that studies and evaluates the quality and changes of food. Based on some basic theories of physics and chemistry and various technologies, it inspects the quality of food raw materials, auxiliary materials, semi-finished products, finished products and by-products in accordance with established technical standards, such as international and national food hygiene and safety standards, to ensure that the products are of qualified quality. The content of food inspection includes sensory testing of food, detection of nutritional components, additives and harmful substances in food, etc.
[0003] The principle of food quality and safety testing instruments is based on the fact that acetylcholinesterase (AChE) is inhibited by pesticides, thus preventing it from catalyzing the hydrolysis and color development of the substrate (indophenol acetate). The pesticide residue rate is calculated by the change in absorbance.
[0004] The operation process is as follows:
[0005] 1. Sampling: Weigh 2g of vegetables (such as leaves), cut them into 1cm² pieces, and put them into an extraction bottle.
[0006] 2. Extraction: Add 10 mL of buffer solution (pH=7.5 phosphate buffer), shake for 2 minutes, let stand, and take the supernatant as the test solution.
[0007] 3. Power-on preheating: Connect the power supply and preheat the instrument for 3-5 minutes to ensure the optical path is stable.
[0008] 4. Blank control: Add 2 mL of buffer solution to a test tube as a blank sample, place it in the instrument calibration channel, and click the "Calibrate" button to zero the absorbance.
[0009] 5. Take 2 mL of the test solution into a new test tube, and add 50 μL of acetylcholinesterase and 50 μL of indophenol acetate substrate in sequence. Mix well and react in the dark for 15 minutes (room temperature above 25℃; if the temperature is lower, a water bath is required).
[0010] 6. Measure absorbance: Place the reacted test tube into the detection channel, click the "Detect" button, and the instrument will automatically read the absorbance change value (ΔA) within 3 minutes.
[0011] 7. Calculation of inhibition rate: The instrument automatically calculates the inhibition rate according to the formula: Inhibition rate (%) = (1 − change in absorbance of blank sample) × 100%
[0012] 8. Result determination: If the inhibition rate is ≥50%, it is determined that the pesticide residue exceeds the standard (it needs to be sent to the laboratory for GC-MS retest); if it is <50%, it is determined that it is qualified.
[0013] Before testing, the test solution needs to be mixed with acetylcholinesterase and indophenol acetate substrate in sequence, and then reacted in the dark for 15 minutes. However, the existing technology generally mixes the solution manually by shaking, which is laborious and the mixing effect is not good.
[0014] To address the aforementioned issues, there is an urgent need for innovative designs in existing food testing mixing techniques. Utility Model Content
[0015] To address the problems of existing methods that rely on manual shaking to mix samples, which is laborious and produces poor mixing results, this invention provides a food quality testing device.
[0016] This utility model is achieved using the following technical solution: A food quality testing device includes a shell and a mixing tank. The mixing tank is rotatably connected inside the shell. A flip cover is hinged to one end of the top of the shell. A first motor is installed inside the mixing tank. A transmission gear is fixedly connected to the top of the first motor. An internal gear is meshed to one end of the transmission gear. Multiple connecting gears are meshed to the inner side of the internal gear. A rack is meshed to one side of the bottom of the connecting gear. A limit block is fixedly connected to one end of the rack. A clamping block is fixedly connected to one side of the limit block. A second motor is installed at the bottom of the shell. A drive wheel is fixedly connected to the top of the second motor. A belt is driven to the outside of the drive wheel. A drive wheel is driven to one end of the belt. A fixed shaft is fixedly connected to the top of the drive wheel. The fixed shaft is fixedly connected to the bottom of the mixing tank.
[0017] Preferably, the mixing tank has multiple movable grooves inside, one end of the clamping block is movably connected to the inside of the movable groove, and the limiting block is movably connected to the inside of the movable groove.
[0018] Preferably, a connecting groove is machined on the inner side of the movable groove, and the rack is movably connected inside the connecting groove.
[0019] Preferably, the mixing tank has a rotating groove machined inside, and the internal gear is rotatably connected inside the rotating groove.
[0020] Preferably, the bottom of the outer casing is machined with a groove, and the belt and drive wheel are rotatably connected to the inner walls of both ends of the groove.
[0021] Preferably, the internal gear and the rack move in two different planes.
[0022] Compared with the prior art, the beneficial effects of this utility model are:
[0023] In use, this invention involves starting the first motor, which drives the transmission gear and internal gear to rotate. The rotation of the internal gear drives multiple connecting gears to rotate, which in turn drives the rack, limiting block, and clamping block to move, thus clamping and fixing the test tubes. Then, the flip cover is closed, and the second motor is started. The second motor drives the drive wheel to rotate, which in turn drives the transmission wheel to rotate via a belt. The transmission wheel drives the fixed shaft and mixing tank to rotate, which in turn causes the sample test tubes inside to rotate, thereby mixing the samples in the test tubes more evenly. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0025] Figure 2 This is a cross-sectional view of the outer shell of this utility model;
[0026] Figure 3 This is a cross-sectional view of the mixing tank of this utility model;
[0027] Figure 4 This is a schematic diagram of the connection structure between the internal gear and the connecting gear of this utility model.
[0028] In the diagram: 1. Outer shell; 2. Mixing tank; 3. Flip-top; 4. Clamping block; 5. First motor; 6. Transmission gear; 7. Internal gear; 8. Connecting gear; 9. Rack; 10. Limiting block; 11. Movable groove; 12. Connecting groove; 13. Rotating groove; 14. Second motor; 15. Drive wheel; 16. Belt; 17. Transmission wheel; 18. Fixed shaft; 19. Groove. Detailed Implementation
[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0030] Example 1: Please refer to Figure 1 - Figure 4This embodiment of a food quality testing device includes a housing 1 and a mixing tank 2. The mixing tank 2 is rotatably connected to the inside of the housing 1. A flip cover 3 is hinged to one end of the top of the housing 1. A first motor 5 is installed inside the mixing tank 2. A transmission gear 6 is fixedly connected to the top of the first motor 5. An internal gear 7 is meshed to one end of the transmission gear 6. Multiple connecting gears 8 are meshed to the inner side of the internal gear 7. A rack 9 is meshed to one side of the bottom of the connecting gear 8. A limit block 10 is fixedly connected to one end of the rack 9. A clamping block 4 is fixedly connected to one side of the limit block 10. A second motor 14 is installed at the bottom of the housing 1. A drive wheel 15 is fixedly connected to the top of the second motor 14. A belt 16 is driven to the outside of the drive wheel 15. A drive wheel 17 is driven to one end of the belt 16. A fixed shaft 18 is fixedly connected to the top of the drive wheel 17. The fixed shaft 18 is fixedly connected to the bottom of the mixing tank 2.
[0031] When it is necessary to mix the food sample, the test tube containing the sample is placed inside the mixing tank 2 with a sealing plug. Then, the first motor 5 is started. The first motor 5 will drive the transmission gear 6 to rotate. The transmission gear 6 will drive the internal gear 7 to rotate. The rotation of the internal gear 7 will drive multiple connecting gears 8 to rotate. The multiple connecting gears 8 will drive the rack 9 to move. The rack 9 will drive the limiting block 10 to move. The limiting block 10 will drive the clamping block 4 to move, so that the multiple clamping blocks 4 can move to clamp and fix the test tube. Then, the flip cover 3 is closed.
[0032] Next, the second motor 14 is started. The second motor 14 will drive the drive wheel 15 to rotate. The drive wheel 15 will drive the belt 16 to move. The belt 16 will drive the transmission wheel 17 to rotate. The transmission wheel 17 will drive the fixed shaft 18 to rotate. The fixed shaft 18 will drive the mixing tank 2 to rotate. The rotation of the mixing tank 2 will drive the sample test tube inside it to rotate, thereby fully mixing the sample in the test tube.
[0033] Furthermore, the mixing tank 2 has multiple movable grooves 11 inside. One end of the clamping block 4 is movably connected to the inside of the movable groove 11, and the limiting block 10 is movably connected to the inside of the movable groove 11. When the limiting block 10 drives the clamping block 4 to move, one end of the clamping block 4 is disengaged from the movable groove 11 and moves outward. The limiting block 10 will move along the inside of the movable groove 11. By providing the movable groove 11, the movable groove 11 will limit the movement of the limiting block 10 and prevent the clamping block 4 from disengaging from the inside of the movable groove 11.
[0034] Furthermore, a connecting groove 12 is machined on the inner side of the movable groove 11. The rack 9 is movably connected inside the connecting groove 12. The internal gear 7 and the rack 9 move on two different planes. When the connecting gear 8 drives the rack 9 to move, the rack 9 will move along the inside of the connecting groove 12. The connecting groove 12 will limit the movement of the rack 9.
[0035] Furthermore, the mixing tank 2 has a rotating groove 13 machined inside, and the internal gear 7 is rotatably connected inside the rotating groove 13. When the transmission gear 6 rotates, driving the internal gear 7 to rotate, the internal gear 7 will move along the inside of the rotating groove 13. The rotating groove 13 will limit the movement of the internal gear 7, thereby keeping the internal gear 7 in a stable state when rotating.
[0036] Furthermore, the bottom of the outer casing 1 is machined with a groove 19, and the belt 16 and the drive wheel 17 are rotatably connected to the inner walls of both ends of the groove 19.
[0037] Working principle: By starting the first motor 5, the first motor 5 will drive the transmission gear 6 and the internal gear 7 to rotate. The rotation of the internal gear 7 will drive the rotation of multiple connecting gears 8. The connecting gears 8 will drive the rack 9, the limiting block 10 and the clamping block 4 to move, so that the multiple clamping blocks 4 clamp and fix the test tube. Then the flip cover 3 is closed and the second motor 14 is started. The second motor 14 will drive the drive wheel 15 to rotate. The drive wheel 15 will drive the transmission wheel 17 to rotate through the belt 16. The transmission wheel 17 will drive the fixed shaft 18 and the mixing tank 2 to rotate. The rotation of the mixing tank 2 will drive the sample test tube inside to rotate, thereby fully mixing the sample in the test tube.
[0038] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A food quality testing device, comprising a shell (1) and a mixing tank (2), characterized in that, The mixing tank (2) is rotatably connected to the inside of the outer shell (1). The top end of the outer shell (1) is hinged to a flip cover (3). The mixing tank (2) is equipped with a first motor (5). The top of the first motor (5) is fixedly connected to a transmission gear (6). One end of the transmission gear (6) is meshed with an internal gear (7). The inner side of the internal gear (7) is meshed with multiple connecting gears (8). The bottom side of the connecting gear (8) is meshed with a rack (9). One end of the rack (9) is fixedly connected to a limit block (10). One side of the limit block (10) is fixedly connected to a clamping block (4). The bottom of the outer shell (1) is provided with a second motor (14), the top of the second motor (14) is fixedly connected to a drive wheel (15), the drive wheel (15) is externally connected to a belt (16), one end of the belt (16) is connected to a drive wheel (17), the top of the drive wheel (17) is fixedly connected to a fixed shaft (18), and the fixed shaft (18) is fixedly connected to the bottom of the mixing tank (2).
2. The food quality testing device according to claim 1, characterized in that, The mixing tank (2) has multiple movable grooves (11) inside. One end of the clamping block (4) is movably connected to the inside of the movable groove (11), and the limiting block (10) is movably connected to the inside of the movable groove (11).
3. The food quality testing device according to claim 2, characterized in that, The inner side of the movable groove (11) is machined with a connecting groove (12), and the rack (9) is movably connected inside the connecting groove (12).
4. The food quality testing device according to claim 3, characterized in that, The mixing tank (2) has a rotating groove (13) inside, and the internal gear (7) is rotatably connected inside the rotating groove (13).
5. The food quality testing device according to claim 1, characterized in that, The bottom of the outer casing (1) is machined with a groove (19), and the belt (16) and the drive wheel (17) are rotatably connected to the inner walls of both ends of the groove (19).
6. The food quality testing device according to claim 1, characterized in that, The internal gear (7) and the rack (9) move in two different planes.