Food heavy metal detection device and detection method thereof

Abstract

The invention relates to the technical field of food detection, in particular to a food heavy metal detection device and a detection method thereof.The food heavy metal detection device comprises a shell and a detection unit; the shell is of a cylindrical structure, three stations are arranged on the shell and include the feeding station, the detection station and the cleaning station, the three stations are evenly distributed around the axis of the shell, the detection unit comprises three detection barrels, and the three detection barrels correspond to the feeding station, the detection station and the cleaning station one to one. The three detection barrels are evenly distributed in the shell around the axis of the shell, a feeding port is formed in the position, corresponding to the feeding position, of the upper portion of the shell, a heavy metal detector for detecting the content of heavy metal in food is arranged in each detection barrel, a smashing unit is further arranged in each detection barrel, and a water injection pipe is arranged on one side of each smashing unit. And a driving unit for driving the detection barrel to rotate around the axis of the shell is arranged at the lower part of the detection barrel. The detection efficiency is improved, and the workload is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of food detection, and in particular to a food heavy metal detection device and a detection method thereof. Background Art

[0002] When testing food, it is usually necessary to use a food testing device to test the food. General food testing devices are difficult to grind and weigh food, are not convenient for testing multiple samples at the same time, are not convenient for collecting and storing tested samples, and are not convenient for centralized storage of excess food residues and expired samples.

[0003] Chinese patent announcement No. CN212379373U discloses a device for detecting heavy metals in food, including a desktop, a grinding table, a food heavy metal detector and a temporary storage box, the upper surface of the food heavy metal detector is fixedly connected to a sliding column, the middle part of the outer side surface of the sliding column is slidably connected to a sleeve, the outer side surface of the sleeve is fixedly connected to a fixing ring through a metal strip, a detection cup is inserted into the interior of the fixing ring, one side of the food heavy metal detector is fixedly connected to a detection cup box, a grinder is arranged inside the grinding table, an electronic scale is installed on one side of the grinding table, one side of the temporary storage box is fixedly connected to a storage box cover through a first hinge, a glass dish is arranged inside the temporary storage box, one side of the temporary storage box is fixedly connected to a label box, and a label is arranged inside the label box.

[0004] Although the above scheme combines the grinding table and the testing instrument on a desktop, they are still separated in essence. The experimenter still needs to manually complete the grinding, sampling, testing, storage and other steps. When testing a large number of foods, the workload of the experimenter is large, and after each test, in order to ensure the accuracy of the test, the experimenter also needs to clean the testing device. During this process, the testing device cannot perform normal testing work and has low efficiency. Summary of the invention

[0005] In view of the above problems, a food heavy metal detection device and a detection method thereof are provided. By setting three detection barrels rotating around the axis of the outer shell, and making the three detection barrels correspond to the feeding position, the detection position and the cleaning position respectively, in the process of detecting food, there are always three detection barrels corresponding to the feeding position, the detection position and the cleaning position, thereby realizing the process of automatic grinding, detection and cleaning of the food heavy metal detection device. Moreover, since three detection barrels are set to correspond to the three workstations respectively, it is ensured that there is always a detection barrel at the feeding position, thereby improving the detection efficiency.

[0006] To solve the problems of the prior art, the present invention provides a food heavy metal detection device, comprising a shell and a detection unit arranged in the shell; the shell is a cylindrical structure, and three workstations are arranged on the shell, namely a feeding position, a detection position and a cleaning position, and the three workstations are evenly arranged around the axis of the shell; the detection unit comprises three detection barrels, and the three detection barrels correspond to the feeding position, the detection position and the cleaning position respectively, and the three detection barrels are evenly distributed in the shell around the axis of the shell, and a feeding port is opened at the upper part of the shell corresponding to the feeding position, and a heavy metal detector for detecting the heavy metal content in the food is arranged in the detection barrel, and a crushing unit is also arranged in the detection barrel, and the crushing unit is used to crush the food, and a water injection pipe is arranged on one side of the crushing unit, and the water injection pipe is used to inject clean water into the detection barrel, and a driving unit for driving the detection barrel to rotate around the axis of the shell is arranged at the lower part of the detection barrel, and during detection, the food is first crushed by the crushing unit, and then water is injected through the water injection pipe.

[0007] Preferably, the crushing unit has a crushing state and a stirring state during operation. The rotation speed of the crushing unit in the crushing state is greater than 1000 rpm, and the rotation speed of the crushing unit in the stirring state is less than 60 rpm. During detection, before the water injection pipe is filled with water, the crushing unit is in the crushing state, and after the water injection pipe is filled with water, the crushing unit is in the stirring state.

[0008] Preferably, the shredding unit comprises a rotating shaft vertically rotatably arranged in the detection barrel, the axis of the rotating shaft is colinear with the axis of the detection barrel, and a blade is fixedly arranged on the side wall of the rotating shaft along the radial direction of the rotating shaft.

[0009] Preferably, a mounting groove is opened inside the rotating shaft along the axis of the rotating shaft, a connecting groove is opened on the side of the mounting groove along the radial direction of the rotating shaft, a shielding plate that can shield the connecting groove is rotatably arranged outside the connecting groove, and the shielding plate rotates around the axis of the rotating shaft. The heavy metal detector is vertically arranged in the mounting groove, and the detection end of the heavy metal detector is vertically downward.

[0010] Preferably, a rotating ring is fixedly provided on the upper part of the baffle plate, the rotating ring is sleeved on the periphery of the rotating shaft, a plurality of magnetic blocks are evenly and fixedly provided on the rotating ring around the axis of the rotating ring, a plurality of first electromagnets distributed around the axis of the rotating shaft are provided above the rotating ring, the first electromagnets are fixedly connected to the rotating shaft, and the first electromagnets are energized in sequence when in operation.

[0011] Preferably, a discharging unit is provided on one side of the water injection pipe, and the discharging unit includes a discharge pipe in a "U"-shaped structure, wherein two ends of the discharge pipe are respectively located inside and outside the detection barrel, and the height of the end of the discharge pipe located outside the detection barrel is lower than the bottom height of the detection barrel, and the discharge pipe can move in a vertical direction, and a magnetic ring is fixedly provided on the discharge pipe, and a second electromagnet is provided below the magnetic ring, and a rotating wheel is rotatably provided below the second electromagnet, and a weight is provided on one side of the rotating wheel in the vertical direction, and a traction rope is provided between the weight and the discharge pipe to fix the two, and the traction rope is wound around the upper part of the rotating wheel.

[0012] Preferably, a detection chamber is provided at the end of the discharge pipe outside the detection barrel, and a visual sensor for detecting turbidity is horizontally provided on one side of the detection chamber, and a rated turbidity is preset.

[0013] Preferably, the driving unit is rotatably arranged on a rotating frame inside the shell along the axis of the shell, and the three detection barrels are all arranged on the rotating frame. A gear ring is fixedly arranged at the bottom of the rotating frame, and a first gear is meshed with one side of the gear ring. A first rotating driver for driving the first gear to rotate is arranged at the lower end of the first gear, and the first rotating driver is fixedly arranged on the shell.

[0014] Preferably, a first gear is provided at the upper part of the shell and rotates along the axis of the shell, a first rotation driver for driving the first gear to rotate is provided at the lower end of the first gear, a second gear is fixedly provided at the upper part of the rotating shaft, the second gear and the first gear are meshed with each other, and when the detection barrel rotates around the axis of the shell, the first rotation driver rotates synchronously around the axis of the shell.

[0015] The present invention also relates to a method for detecting heavy metals in food, which uses a device for detecting heavy metals in food. The specific steps are as follows:

[0016] S1. The food to be tested is put into the testing barrel located at the feeding position from the feeding port of the housing. After the food is put into the testing barrel, the driving unit drives the three testing barrels to rotate. The testing barrel located at the feeding position rotates toward the testing position. When the testing barrel receiving the food to be tested rotates to the testing position, the driving unit stops running.

[0017] S2, the crushing unit in the detection barrel at the detection position is started, and the crushing unit crushes the food in the detection barrel. After the crushing unit runs for a rated time, the water injection pipe injects clean water into the detection barrel. When the water injection pipe injects water, the crushing unit reduces the power to run, and the crushing unit mixes the food and water together. The heavy metal detector detects the mixture of food and water;

[0018] S3. After the detection is completed, the driving unit drives the detection barrel to rotate toward the cleaning position again, and the detection barrel discharges the food and water inside. After the discharge, the water filling pipe is refilled with water. After multiple reciprocating water filling and drainage processes, the driving unit is started again. The driving unit drives the detection barrel after cleaning to rotate to the feeding position to wait for feeding.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention provides three detection barrels that rotate around the axis of the shell, and the three detection barrels correspond to the feeding position, the detection position and the cleaning position respectively. In the process of detecting food, the feeding position, the detection position and the cleaning position are always correspondingly provided with three detection barrels. When detecting, the food is put into the detection barrel from the feeding position, and the detection barrel rotates around the axis of the shell to the detection position. The crushing unit in the detection barrel first crushes the food, and then the water injection pipe injects clean water into the detection barrel. After the crushing unit mixes the food with water, the heavy metal detector starts to detect the heavy metal content in the mixture. After the detection is completed, the detection barrel containing the mixture rotates to the cleaning position, the detection barrel first discharges the internal mixture, and then the water injection pipe injects water into the detection barrel again. The crushing unit stirs the water injected into the detection barrel in a crushing state, so that the water injected into the detection barrel can better clean up the residue in the detection barrel. After multiple cycles, the cleaning is completed. Thereby, the process of automatic grinding, detection and cleaning of the food heavy metal detection device is realized, and since three detection barrels are provided corresponding to three working positions respectively, it is ensured that there is always a detection barrel at the feeding position, thereby improving the detection efficiency.

[0021] 2. By setting a mounting groove in the rotating shaft and a connecting groove on one side of the mounting groove, the heavy metal detector is set in the mounting groove, and a shielding plate is rotatably set on the outer side of the connecting groove. When the crushing unit crushes the food in the detection barrel, the shielding plate will shield the connecting groove. After the crushing is completed, when the water injection pipe starts to inject water, the shielding plate is withdrawn from the connecting groove, and the heavy metal detector can detect the food in the detection barrel. When the detection barrel is in the cleaning position, the shielding plate still does not shield the connecting groove, so that the end of the heavy metal detector can be cleaned while the detection barrel is cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional schematic diagram of a food heavy metal detection device of the present invention. Figure 1 .

[0023] Figure 2 The invention is a food heavy metal detection device Figure 1 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 3The invention is a food heavy metal detection device Figure 1 A local enlarged schematic diagram of point B in the middle.

[0025] Figure 4 This is a three-dimensional schematic diagram of a food heavy metal detection device of the present invention. Figure 2 .

[0026] Figure 5 The invention is a food heavy metal detection device Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0027] Figure 6 The invention discloses a cutaway stereoscopic schematic diagram of a food heavy metal detection device.

[0028] Figure 7 The invention is a food heavy metal detection device Figure 6 A local enlarged schematic diagram of point D in the middle.

[0029] Figure 8 It is a three-dimensional schematic diagram of a food heavy metal detection device of the present invention with the outer shell removed.

[0030] Fig. 9 The invention is a food heavy metal detection device Figure 7 A partial enlarged schematic diagram of point E in the middle.

[0031] Fig.10 The invention discloses a cutaway stereoscopic schematic diagram of a detection unit of a device for detecting heavy metals in food.

[0032] Fig.11 The invention is a food heavy metal detection device Fig.10 A partial enlarged schematic diagram of point F in the middle.

[0033] The numbers in the figure are:

[0034] 1. Shell; 11. Feed inlet; 2. Detection unit; 21. Detection barrel; 22. Heavy metal detector; 23. Crushing unit; 231. Rotating shaft; 2311. Mounting slot; 2312. Connecting slot; 2313. Shielding plate; 2314. First electromagnet; 2315. Magnetic block; 2316. Rotating ring; 232. Blade; 24. Water injection pipe; 25. Driving unit; 251. Rotating frame; 252. Gear ring; 253. First gear; 254. First rotating driver; 26. Discharging unit; 261. Discharging pipe; 2611. Magnetic ring; 262. Second electromagnet; 263. Traction rope; 264. Rotating wheel; 265. Weight; 266. Detection bin; 267. Visual sensor; 27. Second gear; 28. Third gear; 29. ​​Second rotating driver; 3. Fan. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 A food heavy metal detection device comprises a shell 1 and a detection unit 2 arranged in the shell 1; the shell 1 is a cylindrical structure, and three workstations are arranged on the shell 1, the three workstations are a feeding position, a detection position and a cleaning position, and the three workstations are evenly arranged around the axis of the shell 1, and the detection unit 2 comprises three detection barrels 21, and the three detection barrels 21 correspond to the feeding position, the detection position and the cleaning position respectively, and the three detection barrels 21 are evenly distributed in the shell 1 around the axis of the shell 1, and a feeding port is opened at the upper part of the shell 1 corresponding to the feeding position. 11. A heavy metal detector 22 for detecting the heavy metal content in food is arranged in the detection barrel 21. A crushing unit 23 is also arranged in the detection barrel 21. The crushing unit 23 is used to crush the food. A water injection pipe 24 is arranged on one side of the crushing unit 23. The water injection pipe 24 is used to inject clean water into the detection barrel 21. A driving unit 25 for driving the detection barrel 21 to rotate around the axis of the shell 1 is arranged at the lower part of the detection barrel 21. During the detection, the food is first crushed by the crushing unit 23, and then water is injected through the water injection pipe 24.

[0037] When testing for heavy metals in food, the food must first be ground by a grinding mill, and then a certain amount of water must be added to the ground food according to the experimental standards. The specific experimental standards need to be determined according to the actual situation, so as to ensure that the heavy metal detector 22 can detect the heavy metal content in the food. However, the traditional testing process instruments are relatively scattered, and the steps of grinding, sampling, and testing all require manual operation, and the instruments used for testing need to be cleaned after each test is completed, which is a large workload. When the instruments used for testing are cleaned, the instruments used for testing cannot perform the testing work. At the same time, not only the testing instruments need to be cleaned, but also the grinding mill used to crush the food needs to be cleaned after crushing a batch of food, otherwise it is easy to affect the subsequent results and the detection efficiency is low.

[0038] In order to avoid the above situation, the detection unit 2 is redesigned to integrate grinding, detection and cleaning, which reduces the workload of the experimenters and improves the detection efficiency. The specific structure and working process of the detection unit 2 are as follows:

[0039] When conducting the test, the experimenter first needs to put the food to be tested from the feed port 11 into the test barrel 21. The test barrel 21 is located directly below the feed port 11. For ease of understanding, only one of the test barrels 21 is used as a reference for description. After the feeding is completed, the drive unit 25 drives the test barrel 21 to rotate from the feed position toward the test position. When the test barrel 21 rotates to the test position, the crushing unit 23 in the test barrel 21 starts to start. At this time, the upper part of the shell 1 shields the upper part of the test barrel 21. During the process of the crushing unit 23 crushing the food in the test barrel 21, the splashed food will not fly out from the upper part of the test barrel 21. After the crushing unit 23 runs for a rated time, the water injection pipe 24 injects clean water into the test barrel 21. It is worth noting that the crushing unit 23 has a crushing state and a stirring state during operation. The crushing unit 23 first uses the crushing state to crush the food in the detection barrel 21. After reaching the rated time, the crushing unit 23 does not stop running directly, but switches to the stirring state. The rotation speed of the crushing unit 23 in the crushing state is greater than 1000 rpm, and the rotation speed of the crushing unit 23 in the stirring state is less than 60 rpm. This avoids the situation where the mixture formed by the water and food is splashed everywhere after the water injection pipe 24 injects clean water into the detection barrel 21, which is not conducive to subsequent cleaning. When the water injection pipe 24 injects a certain amount of clean water into the detection barrel 21 and the crushing unit 23 completes the stirring, the heavy metal detector 22 starts to detect the mixture in the detection barrel 21. After the heavy metal detector 22 completes the detection, the driving unit 25 runs again and drives the detection barrel 21 to rotate toward the cleaning position. After the detection barrel 21 reaches the cleaning position, the detection barrel 21 first discharges the internal mixture, and then the water injection pipe 24 refills the detection barrel 21 with water. The crushing unit 23 stirs the water injected into the detection barrel 21 in a crushing state, so that the water injected into the detection barrel 21 can better clean up the residue in the detection barrel 21. After multiple cycles, the cleaning is completed. Thereby, the process of automatic grinding, detection and cleaning of the food heavy metal detection device is realized, and since three detection barrels 21 are set, corresponding to three workstations respectively, it is ensured that there is always a detection barrel 21 at the feeding position, thereby improving the detection efficiency.

[0040] Reference Figure 1-Figure 11 : The crushing unit 23 has a crushing state and a stirring state during operation. The rotation speed of the crushing unit 23 when in the crushing state is greater than 1000 rpm, and the rotation speed of the crushing unit 23 when in the stirring state is less than 60 rpm. During detection, before the water injection pipe 24 is filled with water, the crushing unit 23 is in the crushing state, and after the water injection pipe 24 is filled with water, the crushing unit 23 is in the stirring state.

[0041] Reference Figure 7The crushing unit 23 includes a rotating shaft 231 vertically rotatably arranged in the detection barrel 21, the axis of the rotating shaft 231 is colinear with the axis of the detection barrel 21, and a blade 232 is fixedly arranged on the side wall of the rotating shaft 231 along the radial direction of the rotating shaft 231.

[0042] Reference Figure 7 A mounting groove 2311 is provided inside the rotating shaft 231 along the axis of the rotating shaft 231, a connecting groove 2312 is provided on the side of the mounting groove 2311 along the radial direction of the rotating shaft 231, a shielding plate 2313 which can shield the connecting groove 2312 is rotatably provided outside the connecting groove 2312, and the shielding plate 2313 rotates around the axis of the rotating shaft 231, and the heavy metal detector 22 is vertically provided in the mounting groove 2311, and the detection end of the heavy metal detector 22 is vertically downward.

[0043] Reference Fig.10 and Fig.11 A rotating ring 2316 is fixedly provided on the upper part of the baffle plate 2313, and the rotating ring 2316 is sleeved on the outer periphery of the rotating shaft 231. A plurality of magnetic blocks 2315 are evenly and fixedly provided on the rotating ring 2316 around the axis of the rotating ring 2316. A plurality of first electromagnets 2314 distributed around the axis of the rotating shaft 231 are provided above the rotating ring 2316. The first electromagnets 2314 are fixedly connected to the rotating shaft 231, and are energized in sequence when in operation.

[0044] After the food is put into the detection barrel 21 from the feed port 11, the detection barrel 21 rotates to the detection position under the action of the driving unit 25. At this time, the baffle plate 2313 blocks the connecting groove 2312, and the rotating shaft 231 drives the blade 232 to start rotating. The blade 232 crushes the food in the detection barrel 21. At this time, the baffle plate 2313 that covers the connecting groove 2312 can prevent the crushed food from entering the installation groove 2311 through the connecting groove 2312 and causing damage to the end of the heavy metal detector 22 located in the installation groove 2311. The baffle plate 2313 is withdrawn from the connecting groove 2312 only after the crushing unit 23 completes the crushing. The crushing unit 23 completes the crushing, which means that the crushing unit 23 switches from the crushing state to the stirring state, so that the heavy metal detector 22 can detect the mixture in the detection barrel 21. When cleaning the detection barrel 21, the shielding plate 2313 is also in a withdrawn state, that is, the shielding plate 2313 does not block the connecting groove 2312, so that while cleaning the detection barrel 21, the heavy metal detector 22 is also cleaned. The driving principle of the shielding plate 2313 is as follows: since the first electromagnet 2314 is energized in sequence, the first electromagnet 2314 can attract the magnetic block 2315 on the rotating ring 2316 when it is energized, so that the rotating ring 2316 can rotate smoothly, thereby driving the shielding plate 2313 to rotate around the rotating shaft 231. It is worth noting that since the shielding plate 2313 is set on the rotating shaft 231, regardless of whether the shielding plate 2313 blocks the connecting groove 2312, when the rotating shaft 231 rotates, the shielding plate 2313 rotates synchronously with the rotating shaft 231.

[0045] Reference Figure 8 and Fig. 9 A discharge unit 26 is provided on one side of the water injection pipe 24, and the discharge unit 26 includes a discharge pipe 261 in a "U"-shaped structure. Two ends of the discharge pipe 261 are respectively located inside and outside the detection barrel 21, and the height of the end of the discharge pipe 261 located outside the detection barrel 21 is lower than the bottom height of the detection barrel 21. The discharge pipe 261 can move in the vertical direction. A magnetic ring 2611 is fixedly provided on the discharge pipe 261, and a second electromagnet 262 is provided below the magnetic ring 2611. A rotating wheel 264 is rotatably provided below the second electromagnet 262. A weight 265 is provided on one side of the rotating wheel 264 in the vertical direction. A traction rope 263 is provided between the weight 265 and the discharge pipe 261 to fix the two. The traction rope 263 is wound around the upper part of the rotating wheel 264.

[0046] The weight 265 provides a vertical upward traction force for the discharge pipe 261, so that the discharge pipe 261 is always subjected to an upward pulling force. Under the action of the weight 265, the lower end of the discharge pipe 261 located in the detection barrel 21 is not located at the bottom of the detection barrel 21, but is located above the blade 232. The second electromagnet 262 is energized only when the detection barrel 21 is in the cleaning position. In this way, when the detection barrel 21 is in the detection position, the discharge pipe 261 will not form an obstacle to the blade 232 during the operation of the crushing unit 23. When the detection barrel 21 is in the cleaning position, the crushing unit 23 stirs the water in the detection barrel 21 in a crushing state, but during the stirring, the crushing unit 23 operates intermittently. When the crushing unit 23 stops running, the second electromagnet 262 attracts the magnetic ring 2611, and the discharge pipe 261 overcomes the effect of the weight 265 and descends, and the weight 265 rises, and the end of the discharge pipe 261 located in the detection barrel 21 descends to the bottom of the detection barrel 21, and the water in the detection barrel 21 can be smoothly discharged through the discharge pipe 261. A switch valve is provided on the discharge pipe 261. When the detection barrel 21 is in the detection position and the feeding position, the switch valve is in a closed state, which prevents the food to be detected from mixing with water and automatically being discharged through the discharge pipe 261 due to the siphon effect.

[0047] Reference Figure 5 A detection chamber 266 is arranged at the end of the discharge pipe 261 located outside the detection barrel 21, and a visual sensor 267 for detecting turbidity is horizontally arranged on one side of the detection chamber 266, and a rated turbidity is preset.

[0048] When the turbidity in the detection chamber 266 is lower than the rated turbidity, the detection barrel 21 at the cleaning position stops cleaning, and the side of the detection chamber 266 close to the visual sensor 267 is made of transparent material. The stopping of cleaning of the detection barrel 21 at the cleaning position means that the water injection pipe 24 no longer injects water into the detection barrel 21, and the discharge pipe 261 discharges the water in the detection barrel 21. It is worth noting that the visual sensor 267 will also affect the drive unit 25. If the turbidity in the detection chamber 266 is greater than the rated turbidity, the drive unit 25 cannot be started normally. This is because the experimenter needs to manually activate the drive unit 25 every time he puts food into the detection barrel 21 at the feeding position. When the detection barrel 21 at the cleaning position has not been cleaned, the drive unit 25 will not operate.

[0049] Reference Figure 4-Figure 6 The driving unit 25 is rotatably arranged on a rotating frame 251 inside the shell 1 along the axis of the shell 1. The three detection barrels 21 are all arranged on the rotating frame 251. A gear ring 252 is fixedly arranged at the bottom of the rotating frame 251. A first gear 253 is meshed with one side of the gear ring 252. A first rotating driver 254 for driving the first gear 253 to rotate is arranged at the lower end of the first gear 253. The first rotating driver 254 is fixedly arranged on the shell 1.

[0050] The first rotary drive 254 is preferably a servo motor.

[0051] Reference Figure 6 and Figure 8 : A first gear 253 is provided at the upper part of the outer shell 1 to rotate along the axis of the outer shell 1, and a first rotation driver 254 for driving the first gear 253 to rotate is provided at the lower end of the first gear 253. A second gear 27 is fixedly provided at the upper part of the rotating shaft 231, and the second gear 27 is meshed with the first gear 253. When the detection barrel 21 rotates around the axis of the outer shell 1, the first rotation driver 254 rotates synchronously around the axis of the outer shell 1.

[0052] The second rotary driver 29 is fixedly arranged on the rotating frame 251. The second rotary driver 29 is preferably a servo motor. When the first rotary driver 254 drives the gear ring 252 to rotate through the first gear 253, the second rotary driver 29 can rotate together with the rotating frame 251, ensuring that the first rotary driver 254 and the second rotary driver 29 do not interfere with each other during operation. A fan 3 is rotatably arranged on the housing 1 above the cleaning position, and the fan 3 generates an airflow from top to bottom in the vertical direction. This avoids the situation where more water stains remain on the inner wall of the detection barrel 21 after cleaning.

[0053] Reference Figure 1-Figure 11 The present invention also relates to a method for detecting heavy metals in food, which uses a device for detecting heavy metals in food. The specific steps are as follows:

[0054] S1. The food to be tested is put into the testing barrel 21 located at the feeding position from the feeding port 11 of the housing 1. After the food is put into the testing barrel 21, the driving unit 25 drives the three testing barrels 21 to rotate. The testing barrel 21 located at the feeding position rotates toward the testing position. When the testing barrel 21 receiving the food to be tested rotates to the testing position, the driving unit 25 stops running.

[0055] S2, the crushing unit 23 in the detection barrel 21 located at the detection position is started, and the crushing unit 23 crushes the food in the detection barrel 21. After the crushing unit 23 runs for a rated time, the water injection pipe 24 injects clean water into the detection barrel 21. When the water injection pipe 24 injects water, the crushing unit 23 reduces the power to operate, and the crushing unit 23 mixes the food and water together, and the heavy metal detector 22 detects the mixture of food and water;

[0056] S3. After the detection is completed, the driving unit 25 drives the detection barrel 21 to rotate toward the cleaning position again, and the detection barrel 21 discharges the food and water inside. After the discharge, the water filling pipe 24 is filled with water again. After multiple reciprocating water filling and drainage processes, the driving unit 25 is started again. The driving unit 25 drives the detection barrel 21 that has completed cleaning to rotate to the feeding position to wait for feeding.

[0057] Working principle: When conducting the test, the experimenter first needs to put the food to be tested from the feed port 11 into the test barrel 21. The test barrel 21 is located directly below the feed port 11. For ease of understanding, only one of the test barrels 21 is used as a reference for description. After the feeding is completed, the drive unit 25 drives the test barrel 21 to rotate from the feed position toward the test position. When the test barrel 21 rotates to the test position, the crushing unit 23 in the test barrel 21 starts to start. At this time, the upper part of the shell 1 shields the upper part of the test barrel 21. During the process of the crushing unit 23 crushing the food in the test barrel 21, the splashing food will not fly out from the upper part of the test barrel 21. After the crushing unit 23 runs for a rated time, the water injection pipe 24 injects clean water into the test barrel 21.

[0058] It is worth noting that the crushing unit 23 has a crushing state and a stirring state during operation. The crushing unit 23 first uses the crushing state to crush the food in the detection barrel 21. After reaching the rated time, the crushing unit 23 does not stop running directly, but switches to the stirring state. The rotation speed of the crushing unit 23 in the crushing state is greater than 1000 rpm, and the rotation speed of the crushing unit 23 in the stirring state is less than 60 rpm. This avoids the situation where the mixture formed by the water and food is splashed everywhere after the water injection pipe 24 injects clean water into the detection barrel 21, which is not conducive to subsequent cleaning. When the water injection pipe 24 injects a certain amount of clean water into the detection barrel 21 and the crushing unit 23 completes the stirring, the heavy metal detector 22 starts to detect the mixture in the detection barrel 21. After the heavy metal detector 22 completes the detection, the driving unit 25 runs again and drives the detection barrel 21 to rotate toward the cleaning position. After the detection barrel 21 reaches the cleaning position, the detection barrel 21 first discharges the internal mixture, and then the water injection pipe 24 refills the detection barrel 21 with water. The crushing unit 23 stirs the water injected into the detection barrel 21 in a crushing state, so that the water injected into the detection barrel 21 can better clean up the residue in the detection barrel 21. After multiple cycles, the cleaning is completed. Thereby, the process of automatic grinding, detection and cleaning of the food heavy metal detection device is realized, and since three detection barrels 21 are set, corresponding to three workstations respectively, it is ensured that there is always a detection barrel 21 at the feeding position, thereby improving the detection efficiency.

[0059] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A food heavy metal detection device, comprising a housing (1) and a detection unit (2) arranged in the housing (1); It is characterized in that The outer shell (1) is a cylindrical structure. Three workstations are arranged on the outer shell (1). The three workstations are a feeding position, a detection position and a cleaning position. The three workstations are evenly arranged around the axis of the outer shell (1). The detection unit (2) comprises three detection barrels (21). The three detection barrels (21) correspond to the feeding position, the detection position and the cleaning position respectively. The three detection barrels (21) are evenly distributed in the outer shell (1) around the axis of the outer shell (1). A feeding port (11) is opened at the upper part of the outer shell (1) corresponding to the feeding position. A detection barrel (21) is provided with a detection device for detecting the weight of food. A heavy metal detector (22) for detecting metal content is provided in a detection barrel (21). A crushing unit (23) is provided in the detection barrel (21). The crushing unit (23) is used to crush food. A water injection pipe (24) is provided on one side of the crushing unit (23). The water injection pipe (24) is used to inject clean water into the detection barrel (21). A driving unit (25) is provided at the bottom of the detection barrel (21) for driving the detection barrel (21) to rotate around the axis of the housing (1). During detection, the food is first crushed by the crushing unit (23) and then water is injected through the water injection pipe (24).

2. A food heavy metal detection device according to claim 1, characterized in that: The crushing unit (23) has a crushing state and a stirring state during operation. The rotation speed of the crushing unit (23) when in the crushing state is greater than 1000 revolutions per minute, and the rotation speed of the crushing unit (23) when in the stirring state is less than 60 revolutions per minute. During detection, before the water injection pipe (24) is filled with water, the crushing unit (23) is in the crushing state, and after the water injection pipe (24) is filled with water, the crushing unit (23) is in the stirring state.

3. A food heavy metal detection device according to claim 1, characterized in that: The crushing unit (23) comprises a rotating shaft (231) vertically rotatably arranged in the detection barrel (21), the axis of the rotating shaft (231) being colinear with the axis of the detection barrel (21), and a blade (232) being fixedly arranged on a side wall of the rotating shaft (231) along a radial direction of the rotating shaft (231).

4. A food heavy metal detection device according to claim 3, characterized in that: A mounting groove (2311) is provided in the rotating shaft (231) along the axis of the rotating shaft (231); a connecting groove (2312) is provided on the side of the mounting groove (2311) along the radial direction of the rotating shaft (231); a shielding plate (2313) capable of shielding the connecting groove (2312) is rotatably provided outside the connecting groove (2312); the shielding plate (2313) rotates around the axis of the rotating shaft (231); the heavy metal detector (22) is vertically provided in the mounting groove (2311), and the detection end of the heavy metal detector (22) is vertically downward.

5. A food heavy metal detection device according to claim 4, characterized in that: A rotating ring (2316) is fixedly arranged on the upper part of the shielding plate (2313), and the rotating ring (2316) is sleeved on the outer periphery of the rotating shaft (231). A plurality of magnetic blocks (2315) are evenly and fixedly arranged on the rotating ring (2316) around the axis of the rotating ring (2316). A plurality of first electromagnets (2314) distributed around the axis of the rotating shaft (231) are arranged above the rotating ring (2316), and the first electromagnets (2314) are fixedly connected to the rotating shaft (231), and are energized in sequence when in operation.

6. A food heavy metal detection device according to claim 1, characterized in that: A discharge unit (26) is provided on one side of the water injection pipe (24), and the discharge unit (26) comprises a discharge pipe (261) in a "U"-shaped structure, and two ends of the discharge pipe (261) are respectively located inside and outside the detection barrel (21), and the height of the end of the discharge pipe (261) located outside the detection barrel (21) is lower than the bottom height of the detection barrel (21), and the discharge pipe (261) can move in a vertical direction. A magnetic attraction ring (2611) is provided, a second electromagnet (262) is arranged below the magnetic attraction ring (2611), a rotating wheel (264) is rotatably arranged below the second electromagnet (262), a weight (265) is arranged on one side of the rotating wheel (264) in a vertical direction, a traction rope (263) is arranged between the weight (265) and the discharge pipe (261) to fix the two, and the traction rope (263) is wound around the upper part of the rotating wheel (264).

7. A food heavy metal detection device according to claim 6, characterized in that: A detection chamber (266) is arranged at the end of a discharge pipe (261) located outside the detection barrel (21), and a visual sensor (267) for detecting turbidity is horizontally arranged on one side of the detection chamber (266), and a rated turbidity is preset.

8. A food heavy metal detection device according to claim 1, characterized in that: The driving unit (25) is rotatably arranged on a rotating frame (251) inside the housing (1) along the axis of the housing (1); the three detection barrels (21) are all arranged on the rotating frame (251); a gear ring (252) is fixedly arranged at the bottom of the rotating frame (251); a first gear (253) is meshed with one side of the gear ring (252); a first rotating driver (254) for driving the first gear (253) to rotate is arranged at the lower end of the first gear (253); and the first rotating driver (254) is fixedly arranged on the housing (1).

9. A food heavy metal detection device according to claim 3, characterized in that: A first gear (253) is rotatably arranged on the upper part of the housing (1) along the axis of the housing (1); a first rotation driver (254) for driving the first gear (253) to rotate is arranged at the lower end of the first gear (253); a second gear (27) is fixedly arranged on the upper part of the rotating shaft (231); the second gear (27) and the first gear (253) are meshed with each other; when the detection barrel (21) rotates around the axis of the housing (1), the first rotation driver (254) rotates synchronously around the axis of the housing (1).

10. A method for detecting heavy metals in food, using a device for detecting heavy metals in food according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1. The food to be tested is fed into the testing barrel (21) located at the feeding position through the feeding port (11) of the housing (1). After the food is fed, the driving unit (25) drives the three testing barrels (21) to rotate, and the testing barrel (21) located at the feeding position rotates toward the testing position. When the testing barrel (21) receiving the food to be tested rotates to the testing position, the driving unit (25) stops running. S2, the crushing unit (23) in the detection barrel (21) located at the detection position is started, and the crushing unit (23) crushes the food in the detection barrel (21). After the crushing unit (23) runs for a rated time, the water injection pipe (24) injects clean water into the detection barrel (21). When the water injection pipe (24) injects water, the crushing unit (23) reduces the power to operate, and the crushing unit (23) stirs the food and water together, and the heavy metal detector (22) detects the mixture of food and water; S3, after the detection is completed, the driving unit (25) drives the detection barrel (21) to rotate toward the cleaning position again, and the detection barrel (21) discharges the food and water inside. After the discharge, the water injection pipe (24) is refilled with water. After the water injection and water injection process is repeated multiple times, the driving unit (25) is started again, and the driving unit (25) drives the detection barrel (21) after cleaning to rotate to the feeding position to wait for feeding.

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