Sample mixing device for food detection

Abstract

The invention discloses a sample mixing device for food detection, and relates to the technical field of food sample mixing, the sample mixing device comprises a bearing base, and an upper mixing cylinder and a lower mixing cylinder rotatably mounted in the middle of the top surface of the bearing base; a feeding mechanism is fixedly mounted above the bearing base, and the feeding mechanism comprises a feeding rack fixedly mounted in the middle of the top surface of the protective top cover; a material mixing mechanism is arranged above the bearing base and comprises a main material mixing bevel gear and an auxiliary material mixing bevel gear; wherein a stirring mechanism is arranged in the middle of the upper part of the bearing base, and the stirring mechanism comprises a main stirring rod and an auxiliary stirring rod. According to the sample mixing device for food detection, food samples are dispersed and then put into the upper material mixing barrel and the lower material mixing barrel which rotate oppositely, the main stirring rod and the auxiliary stirring rod which rotate oppositely assist in food mixing, meanwhile, the material scraping vertical plate and the material removing push plate clean the sticky food, and cross contamination caused by residues is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of food sample mixing, and specifically to a sample mixing device for food detection. Background Technique

[0002] Food sample detection is an important link in ensuring food safety, involving various technical processes and standard requirements, mainly including means such as sample collection, pretreatment, and detection. Before detection, food samples need to be mixed. Food itself has non-uniformity (such as differences in components in different parts) and variability (such as changes in components caused by microbial activities). Through mixing treatment, local differences can be eliminated, so that the final detection results can truly reflect the quality status of the entire batch of food.

[0003] The invention with the publication number CN110302700A discloses a sample mixing device for organic food detection, which uses the impact force of high-pressure water to wash away the slurry remaining on multiple groups of left stirring plates and multiple groups of right stirring plates. As the water in the stirring tank gradually increases, open the tank cover and observe the water level in the stirring tank. When the water level in the stirring tank is relatively high, close the left water pipe and the right water pipe. The rotating multiple groups of left stirring plates and multiple groups of right stirring plates continuously stir the water in the stirring tank, causing the slurry remaining on the inner wall of the stirring tank to fall off. Finally, open the valve to discharge the cleaning water in the stirring tank, which is convenient for cleaning the stirring tank and improves the rationality of use.

[0004] The utility model with the publication number CN213132927U discloses an efficient mixer for food production detection. By setting a concave cavity, a cylinder, and stirring teeth, the piston rod of the cylinder is in the extended state, pushing the first servo motor downward to leave the inside of the concave cavity, and the stirring teeth enter the stirring barrel. The output shaft of the first servo motor drives the main shaft to rotate, and the stirring teeth rotate along with the main shaft, in the opposite direction to the driving direction of the second servo motor, which can fully stir and mix the food raw materials in the stirring barrel, and the stirring effect is efficient.

[0005] However, the above-mentioned disclosed mixing devices for food detection still have the following problems in actual use: Although the mixing of food is assisted by a stirring mechanism built into the mixing device, during operation, due to long-term contact with food, some food remains on the outer wall of the stirring mechanism during the feeding process, and manual assistance is required for cleaning. At the same time, a single rotating stirring blade cannot effectively improve the mixing effect of food, affecting the efficiency of mixing and feeding.

[0006] Therefore, we propose a sample mixing device for food detection to solve the problems raised above. Summary of the Invention

[0007] The object of the present invention is to provide a sample mixing device for food detection, aiming to solve the problems that in the existing technology, a stirring mechanism built into the mixing device is used to assist in mixing food. However, during operation, since the stirring mechanism comes into contact with food for a long time, some food remains on the outer wall of the stirring mechanism during the feeding process, which requires manual assistance for cleaning. At the same time, a single rotating stirring blade cannot effectively improve the mixing effect of food, affecting the mixing and feeding efficiency.

[0008] To achieve the above object, the present invention provides the following technical solution: A sample mixing device for food detection, comprising a carrying base, and an upper mixing cylinder and a lower mixing cylinder rotatably installed in the middle of the top surface of the carrying base, and the upper mixing cylinder and the lower mixing cylinder are sleeved and connected; further comprising: Above the carrying base, a feeding mechanism is fixedly installed, and the feeding mechanism includes a feeding rack fixedly installed in the middle of the top surface of the protective top cover, and the feeding rack is connected through the protective top cover, and the protective top cover covers the top of the upper mixing cylinder; Above the carrying base, a mixing mechanism is provided, and the mixing mechanism includes a main mixing bevel gear and a secondary mixing bevel gear, and the main mixing bevel gear is fixedly installed on the outer walls of the upper mixing cylinder and the lower mixing cylinder in opposite directions; Among them, in the middle above the carrying base, a stirring mechanism is provided, and the stirring mechanism includes a main stirring rod and a secondary stirring rod.

[0009] Preferably, the feeding mechanism includes a dispersion roller, and the dispersion roller is rotatably installed on the left and right sides above the inside of the feeding rack through bearings, and drive gears are fixedly installed at the rear ends of the dispersion rollers outside the feeding rack, and the symmetrically arranged drive gears are meshed with each other, and at the same time, the left drive gear is fixedly connected to the output shaft end of the drive motor.

[0010] Preferably, the feeding mechanism includes a feeding partition plate, and the feeding partition plate slidably penetrates through the bottom end of the feeding rack, and the feeding partition plate opens and closes the through hole between the protective top cover and the feeding rack, and the right end of the feeding partition plate is hinged to the left end of the pushing connecting rod.

[0011] Preferably, the feeding mechanism includes a driving turntable, and the driving turntable is rotatably arranged above the right side of the protective top cover, and the top surface of the driving turntable is eccentrically hinged to the right end of the pushing connecting rod, and the driving turntable and the pushing connecting rod are used to drive the feeding partition plate to slide reciprocally, realizing the intermittent feeding of food.

[0012] Preferably, the auxiliary mixing bevel gear included in the mixing mechanism is rotatably installed on the right side of the top surface of the bearing base through a bearing, and the auxiliary mixing bevel gear is meshed with the main mixing bevel gears on the outer walls of the upper mixing cylinder and the lower mixing cylinder. Moreover, the rotation directions of the upper mixing cylinder and the lower mixing cylinder are opposite to each other. And the right end of the auxiliary mixing bevel gear is meshed with the bottom end of the transmission rotating shaft through a driving bevel gear set. At the same time, the top end of the transmission rotating shaft is connected to the protective top cover through a bearing and fixedly installed in the middle of the bottom surface of the driving turntable.

[0013] Preferably, the bottom end of the main stirring rod included in the stirring mechanism is fixedly installed at the top end of the output shaft of the driving motor on the bottom surface of the bearing base. The bottom end of the auxiliary stirring rod is fixedly installed in the middle of the bottom surface of the lower mixing cylinder. And the bottom end of the main stirring rod penetrates through the middle of the auxiliary stirring rod. Moreover, main stirring blades are rotatably arranged at equal distances on the outside of the main stirring rod through bearings. And a guiding gear is fixedly installed at the central position of the main stirring blades inside the main stirring rod.

[0014] Preferably, the stirring mechanism includes a lifting bracket. And the middle of the lifting bracket elastically penetrates through the lower end of the main stirring rod. Moreover, an intermittent rack is fixedly installed on the top surface of the lifting bracket inside the main stirring rod. And the intermittent rack is meshed with the guiding gears arranged at equal distances. The rotating lifting bracket realizes lifting by abutting against the auxiliary stirring rod, and is transmitted to the main stirring blades to rotate and improve the mixing efficiency.

[0015] Preferably, the auxiliary stirring rods included in the stirring mechanism are distributed in a "U" - shaped structure. And auxiliary stirring blades are fixedly arranged at equal distances on the inner sides of the upper ends of the auxiliary stirring rods. Moreover, scraping vertical plates are fixedly installed at equal distances on the outer sides of the upper ends of the auxiliary stirring rods. And a material removing push plate is elastically slidably arranged on the outside of the scraping vertical plates. The sliding material removing push plate pushes off the food samples adhered to the surface of the scraping vertical plates.

[0016] Preferably, the stirring mechanism includes a pressure sliding rod elastically slidable inside the auxiliary stirring rod. And pushing inclined blocks are fixedly installed at equal distances on the outside of the pressure sliding rod. And the adjacent surfaces of the pushing inclined blocks and the material removing push plate are distributed in an inclined structure. Moreover, the downward movement of the pushing inclined blocks is used to extrude the material removing push plate to slide outward.

[0017] Preferably, the stirring mechanism includes guiding sliders fixedly installed on the left and right sides of the bottom surface of the feeding rack. And the bottom surfaces of the guiding sliders are in an inclined slope structure. And the guiding sliders are in contact with the rotating pressure sliding rod, so that the pressure sliding rod can perform intermittent lifting to drive the material removing push plate to clean the scraping vertical plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: for the food detection sample mixing device, after dispersing the food samples, they are put into the upper mixing cylinder and the lower mixing cylinder that rotate in opposite directions. The main stirring rods and the auxiliary stirring rods that rotate in opposite directions assist in mixing the food. At the same time, the scraping vertical plates and the material removing push plates clean the sticky food, avoiding residue and cross-contamination. The specific content is as follows: 1. The upper mixing cylinder and the lower mixing cylinder are connected by a main mixing bevel gear and an engaged auxiliary mixing bevel gear, so that the auxiliary mixing bevel gear meshes with the main mixing bevel gears in opposite directions on the upper and lower sides during rotation, so that the main mixing bevel gears on the upper and lower sides drive the fixedly connected upper mixing cylinder and the lower mixing cylinder to rotate in opposite directions, improving the efficiency of mixing food samples.

[0019] 2. The food samples are put in through the feeding rack. The driven gear meshes with the dispersing roller to rotate in the opposite direction, so as to disperse the agglomerated and sticky food. At the same time, the auxiliary mixing bevel gear drives the transmission rotating shaft and the driving turntable to rotate through the driving bevel gear set, so that the eccentrically connected pushing connecting rod drives the feeding partition board to open and close reciprocally, assisting the intermittently feeding of the dispersed food.

[0020] 3. The main stirring rod is driven to rotate by the motor. The external main stirring blades contact the food for mixing. After the lifting bracket contacts the auxiliary stirring rod, the lifting bracket drives the intermittent rack to move up and down, so that the engaged guiding gear drives the main stirring blades to rotate reciprocally, assisting in the efficient mixing and stirring of the food.

[0021] 4. The auxiliary stirring rod rotates with the lower mixing cylinder. The auxiliary stirring blades inside it cooperate with the main stirring blades to stir the food in the opposite direction. The scraping vertical plates on the outside rotate along the inner walls of the upper mixing cylinder and the lower mixing cylinder, assisting in cleaning the food sticking to the inner walls and avoiding residue.

[0022] Furthermore, the pressure sliding rod at the top of the auxiliary stirring rod contacts the guiding slider, so that the pressure sliding rod drives the pushing inclined block to rise and fall synchronously. The pushing inclined block squeezes the fitting material removing push plate to slide outwards, cleaning and dropping the food sticking to the scraping vertical plate, avoiding residue and cross-contamination of the food. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the installation structure schematic diagram of the feeding rack of the present invention; Figure 3 is the structure schematic diagram after the feeding partition board slides of the present invention; Figure 4 is the installation structure schematic diagram of the dispersing roller of the present invention; Figure 5 Schematic structural diagram of the connection between the upper mixing cylinder and the lower mixing cylinder of the present invention; Figure 6 For the present invention Figure 5 Schematic enlarged structural diagram at position A in the present invention; Figure 7 Schematic structural diagram of the installation of the main stirring rod and the auxiliary stirring rod of the present invention; Figure 8 Schematic three-dimensional structural diagram of the main stirring rod of the present invention; Figure 9 For the present invention Figure 8 Schematic enlarged structural diagram at position B in the present invention; Figure 10 Schematic three-dimensional structural diagram of the auxiliary stirring rod of the present invention; Figure 11 Schematic structural diagram of the present invention after the material removal push plate slides.

[0024] In the figure: 1, bearing base; 2, upper mixing cylinder; 3, lower mixing cylinder; 4, protective top cover; 5, feeding rack; 6, main mixing bevel gear; 7, auxiliary mixing bevel gear; 8, main stirring rod; 9, auxiliary stirring rod; 10, dispersing roller; 11, driving gear; 12, feeding partition board; 13, pushing connecting rod; 14, driving turntable; 15, driving bevel gear set; 16, transmission rotating shaft; 17, main stirring blade; 18, guiding gear; 19, lifting support; 20, intermittent rack; 21, auxiliary stirring blade; 22, scraping vertical plate; 23, material removal push plate; 24, pressure sliding rod; 25, pushing inclined block; 26, guiding slider. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-11 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problems existing in the existing mixing mechanism for food samples, therefore, the following technical solutions are disclosed in this embodiment. A sample mixing device for food detection includes a bearing base 1, and an upper mixing cylinder 2 and a lower mixing cylinder 3 rotatably installed in the middle of the top surface of the bearing base 1, and the upper mixing cylinder 2 and the lower mixing cylinder 3 are sleeved and connected; a mixing mechanism is arranged above the bearing base 1, and the mixing mechanism includes a main mixing bevel gear 6 and an auxiliary mixing bevel gear 7, and the main mixing bevel gear 6 is fixedly installed on the outer walls of the upper mixing cylinder 2 and the lower mixing cylinder 3 in a way with opposite directions.

[0027] The auxiliary mixing bevel gear 7 included in the mixing mechanism is rotatably installed on the right side of the top surface of the bearing base 1 through a bearing, and the auxiliary mixing bevel gear 7 is meshed and connected to the main mixing bevel gear 6 on the outer walls of the upper mixing cylinder 2 and the lower mixing cylinder 3. Moreover, the rotation directions of the upper mixing cylinder 2 and the lower mixing cylinder 3 are opposite to each other. And the right end of the auxiliary mixing bevel gear 7 is meshed and connected to the bottom end of the transmission rotating shaft 16 through the driving bevel gear set 15. At the same time, the top end of the transmission rotating shaft 16 is bearing-connected to the protective top cover 4 and fixedly installed in the middle of the bottom surface of the driving turntable 14.

[0028] As Figures 5-6 shown, the driving motor on the right side of the top surface of the bearing base 1 drives the fixedly connected auxiliary mixing bevel gear 7 to rotate. Through the auxiliary mixing bevel gear 7, the main mixing bevel gears 6 meshed and connected to the upper and lower ends on the left side are driven, so that the upper mixing cylinder 2 and the lower mixing cylinder 3 on the upper and lower sides rotate in opposite directions (the upper mixing cylinder 2 is rotatably installed on the top surface of the bearing base 1 through brackets at equal angles on the outer wall, and the lower mixing cylinder 3 is rotatably installed on the top surface of the bearing base 1). When the upper mixing cylinder 2 and the lower mixing cylinder 3 sleeved on each other rotate in opposite directions, the mixing efficiency for the internal food samples is improved.

[0029] Embodiment 2: In order to solve the problems existing in the existing mixing mechanism for food samples, the following technical solutions are disclosed in this embodiment. A feeding mechanism is fixedly installed above the bearing base 1. And the feeding mechanism includes a feeding rack 5 fixedly installed in the middle of the top surface of the protective top cover 4. Moreover, there is a through connection between the feeding rack 5 and the protective top cover 4. And the protective top cover 4 covers the top end of the upper mixing cylinder 2. The feeding mechanism includes a dispersion roller 10, and the dispersion roller 10 is rotatably installed on the left and right sides above the inside of the feeding rack 5 through bearings. And driving gears 11 are fixedly installed at the rear ends of the dispersion roller 10 outside the feeding rack 5. Moreover, the symmetrically arranged driving gears 11 are meshed and connected to each other. At the same time, the driving gear 11 on the left side is fixedly connected to the output shaft end of the driving motor.

[0030] The feeding mechanism includes a feeding partition plate 12, and the feeding partition plate 12 slidably penetrates through the bottom end of the feeding rack 5. And the feeding partition plate 12 opens and closes the through connection between the protective top cover 4 and the feeding rack 5. And the right end of the feeding partition plate 12 is hinged to the left end of the pushing connecting rod 13. The feeding mechanism includes a driving turntable 14, and the driving turntable 14 is rotatably arranged above the right side of the protective top cover 4. And the top surface of the driving turntable 14 is eccentrically hinged to the right end of the pushing connecting rod 13. And the driving turntable 14 and the pushing connecting rod 13 are used to drive the feeding partition plate 12 to slide reciprocally, realizing the intermittent feeding of food.

[0031] As Figures 2-3As shown, the food sample is placed inside the feeding rack 5 on the top surface of the protective top cover 4. Then, the driving gear 11 behind the feeding rack 5 is driven by a motor to engage and rotate, so that the dispersing roller 10 inside the feeding rack 5 driven by the driving gears 11 rotating in opposite directions rotates, causing the dispersing roller 10 to extrude and disperse the food sample, preventing the food in a lump structure from affecting the subsequent mixing operation.

[0032] Furthermore, during the rotation of the secondary mixing bevel gear 7 on the top surface of the bearing base 1, the transmission rotating shaft 16 engaged and connected thereto and the driving turntable 14 at its top end are driven to rotate through the driving bevel gear set 15, so that the driving turntable 14 drives the pushing connecting rod 13 eccentrically connected to its top surface to rotate reciprocally. The feeding partition plate 12 hinged to the left end of the pushing connecting rod 13 is driven to move reciprocally on the top surface of the protective top cover 4, so that the food dispersed inside the feeding rack 5 through the dispersing roller 10 is put downwards through the reciprocally opening and closing feeding partition plate 12, achieving the effect of intermittent feeding to slow down the mixing pressure.

[0033] Embodiment 3: To solve the problems existing in the existing mixing mechanism for food samples, the following technical solutions are disclosed in this embodiment. Among them, a stirring mechanism is arranged in the middle above the bearing base 1, and the stirring mechanism includes a main stirring rod 8 and a secondary stirring rod 9; the bottom end of the main stirring rod 8 included in the stirring mechanism is fixedly installed at the top end of the output shaft of the driving motor on the bottom surface of the bearing base 1, the bottom end of the secondary stirring rod 9 is fixedly installed in the middle of the bottom surface of the lower mixing cylinder 3, and the bottom end of the main stirring rod 8 penetrates through the middle of the secondary stirring rod 9. Moreover, main stirring blades 17 are rotatably arranged at equal distances on the outside of the main stirring rod 8 through bearings, and a guiding gear 18 is fixedly installed at the central position of the main stirring blades 17 inside the main stirring rod 8.

[0034] The stirring mechanism includes a lifting bracket 19, and the middle of the lifting bracket 19 elastically penetrates through the lower end of the main stirring rod 8. Moreover, an intermittent rack 20 is fixedly installed on the top surface of the lifting bracket 19 inside the main stirring rod 8, and the intermittent rack 20 meshes with the guiding gears 18 arranged at equal distances. The rotating lifting bracket 19 realizes lifting by abutting against the secondary stirring rod 9, and is transmitted to the main stirring blades 17 to rotate and improve the mixing efficiency.

[0035] As Figures 7-9As shown in the figure, the main stirring rod 8 included in the stirring mechanism is driven to rotate by a driving motor at the bottom end. During the rotation of the main stirring rod 8, the main stirring blades 17 evenly distributed on the outside are used to mix the dispersed food. At the same time, the main stirring rod 8 drives the intermittent contact between the lifting bracket 19 at the lower end and the main stirring rod 8, so that the lifting bracket 19 drives the intermittently toothed rack 20 fixedly connected to it to move inside the main stirring rod 8 during the reciprocating lifting. The guiding gear 18 meshed with the intermittently toothed rack 20 drives the main stirring blades 17 to rotate intermittently, and cooperates with the revolution realized by the main stirring rod 8 to mix the food efficiently.

[0036] The auxiliary stirring rod 9 included in the stirring mechanism is distributed in a "U" - shaped structure. The inner side of the upper end of the auxiliary stirring rod 9 is fixedly provided with auxiliary stirring blades 21 at equal intervals, and the outer side of the upper end of the auxiliary stirring rod 9 is fixedly installed with scraping vertical plates 22 at equal intervals. Moreover, a material removing push plate 23 is elastically slidably arranged outside the scraping vertical plates 22, and the sliding material removing push plate 23 pushes off the food samples adhered to the surface of the scraping vertical plates 22.

[0037] The stirring mechanism includes a pressure sliding rod 24 elastically sliding inside the auxiliary stirring rod 9. The outside of the pressure sliding rod 24 is fixedly installed with pushing inclined blocks 25 at equal intervals. The adjacent surfaces of the pushing inclined blocks 25 and the material removing push plate 23 are distributed in an inclined structure, and the descent of the pushing inclined blocks 25 is used to squeeze the material removing push plate 23 to slide outward; The stirring mechanism includes guiding sliders 26 fixedly installed on the left and right sides of the bottom surface of the feeding rack 5. The bottom surface of the guiding sliders 26 is in an inclined slope structure, and the guiding sliders 26 are in contact with the rotating pressure sliding rod 24, so that the intermittent lifting of the pressure sliding rod 24 drives the material removing push plate 23 to clean the scraping vertical plates 22.

[0038] As Figure 7 、 Figures 10-11 shown in the figure, the auxiliary stirring rod 9 included in the stirring mechanism rotates with the lower mixing cylinder 3, and the auxiliary stirring blades 21 in contact with the food samples can mix in the opposite direction. At the same time, the scraping vertical plates 22 outside the auxiliary stirring rod 9 rotate in contact with the upper mixing cylinder 2 and the lower mixing cylinder 3 to scrape and clean the adhered food.

[0039] Furthermore, the pressure sliding rod 24 at the top end of the auxiliary stirring rod 9 contacts the guiding slider 26 on the bottom surface of the protective top cover 4 during the rotation process, so that the pressure sliding rod 24 reciprocates up and down during the rotation, and drives the pushing inclined blocks 25 fixedly installed at the lower end to rise and fall synchronously. So that the pushing inclined blocks 25 squeeze the material removing push plate 23 in contact with the inclined surface to slide outward. The material removing push plate 23 contacts the scraping vertical plates 22 to clean and drop the adhered food, so that it can be discharged through the opening at the bottom of the lower mixing cylinder 3, avoiding food residue and cross - contamination.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sample mixing device for food detection, comprising a carrying base (1), and an upper mixing cylinder (2) and a lower mixing cylinder (3) rotatably installed in the middle of the top surface of the carrying base (1), and the upper mixing cylinder (2) and the lower mixing cylinder (3) are sleeved and connected between them; It is characterized in that, It further includes: Above the carrying base (1), a feeding mechanism is fixedly installed, and the feeding mechanism includes a feeding frame (5) fixedly installed in the middle of the top surface of the protective top cover (4), and the feeding frame (5) is connected through the protective top cover (4), and the protective top cover (4) covers the top end of the upper mixing cylinder (2); Above the carrying base (1), a mixing mechanism is provided, and the mixing mechanism includes a main mixing bevel gear (6) and a secondary mixing bevel gear (7), and the main mixing bevel gear (6) is fixedly installed on the outer walls of the upper mixing cylinder (2) and the lower mixing cylinder (3) in opposite directions; Among them, in the middle above the carrying base (1), a stirring mechanism is provided, and the stirring mechanism includes a main stirring rod (8) and a secondary stirring rod (9).

2. The sample mixing device for food detection according to claim 1, characterized in that: The feeding mechanism includes a dispersion roller (10), and the dispersion roller (10) is rotatably installed on the left and right sides above the inside of the feeding frame (5) through bearings, and drive gears (11) are fixedly installed at the rear ends of the dispersion rollers (10) outside the feeding frame (5), and the symmetrically arranged drive gears (11) are meshed and connected, and at the same time, the drive gear (11) on the left is fixedly connected to the output shaft end of the drive motor.

3. The sample mixing device for food detection according to claim 2, wherein: The feeding mechanism includes a feeding partition (12), and the feeding partition (12) slidably penetrates through the bottom end of the feeding frame (5), and the feeding partition (12) opens and closes the through hole between the protective top cover (4) and the feeding frame (5), and the right end of the feeding partition (12) is hinged to the left end of the pushing connecting rod (13).

4. A sample mixing device for food detection according to claim 3, characterized in that: The feeding mechanism includes a driving turntable (14), and the driving turntable (14) is rotatably arranged above the right side of the protective top cover (4), and the top surface of the driving turntable (14) is eccentrically hinged to the right end of the pushing connecting rod (13), and the driving turntable (14) and the pushing connecting rod (13) are used to drive the feeding partition (12) to slide reciprocally to realize the intermittent feeding of food.

5. A sample mixing device for food detection according to claim 1, wherein: The secondary mixing bevel gear (7) included in the mixing mechanism is rotatably installed on the right side of the top surface of the carrying base (1) through a bearing, and the secondary mixing bevel gear (7) is meshed with the main mixing bevel gear (6) on the outer walls of the upper mixing cylinder (2) and the lower mixing cylinder (3), and the rotation directions of the upper mixing cylinder (2) and the lower mixing cylinder (3) are opposite to each other, and the right end of the secondary mixing bevel gear (7) is meshed with the bottom end of the transmission rotating shaft (16) through a driving bevel gear set (15), and at the same time, the top end of the transmission rotating shaft (16) is connected to the protective top cover (4) through a bearing and fixedly installed in the middle of the bottom surface of the driving turntable (14).

6. The sample mixing device for food detection according to claim 1, wherein: The bottom end of the main stirring rod (8) included in the stirring mechanism is fixedly installed at the top end of the output shaft of the driving motor on the bottom surface of the bearing base (1). The bottom end of the secondary stirring rod (9) is fixedly installed at the middle of the bottom surface of the lower mixing cylinder (3). The bottom end of the main stirring rod (8) penetrates through the middle of the secondary stirring rod (9). The main stirring blades (17) are rotatably arranged at equal distances on the outside of the main stirring rod (8) through bearings. A guiding gear (18) is fixedly installed at the central position of the main stirring blades (17) inside the main stirring rod (8).

7. The sample mixing device for food detection according to claim 6, characterized in that: The stirring mechanism includes a lifting bracket (19). The middle of the lifting bracket (19) elastically penetrates through the lower end of the main stirring rod (8). An intermittent rack (20) is fixedly installed on the top surface of the lifting bracket (19) inside the main stirring rod (8). The intermittent rack (20) meshes with the guiding gears (18) arranged at equal distances. The rotating lifting bracket (19) realizes lifting by abutting against the secondary stirring rod (9), and transmits the power to the main stirring blades (17) to rotate and improve the mixing efficiency.

8. The sample mixing device for food detection according to claim 1, characterized in that: The secondary stirring rod (9) included in the stirring mechanism is distributed in a "U" - shaped structure. The secondary stirring blades (21) are fixedly arranged at equal distances on the inner side of the upper end of the secondary stirring rod (9). The scraping vertical plates (22) are fixedly installed at equal distances on the outer side of the upper end of the secondary stirring rod (9). The material removing push plate (23) is elastically slidably arranged on the outside of the scraping vertical plate (22). The sliding material removing push plate (23) pushes the food samples adhered to the surface of the scraping vertical plate (22).

9. The sample mixing device for food detection according to claim 8, wherein: The stirring mechanism includes a pressure sliding rod (24) elastically sliding inside the secondary stirring rod (9). The pushing inclined blocks (25) are fixedly installed at equal distances on the outside of the pressure sliding rod (24). The adjacent surfaces of the pushing inclined blocks (25) and the material removing push plate (23) are distributed in an inclined structure. The downward movement of the pushing inclined blocks (25) is used to extrude the material removing push plate (23) to slide outward.

10. The sample mixing device for food detection according to claim 9, wherein: The stirring mechanism includes guiding sliders (26) fixedly installed on the left and right sides of the bottom surface of the feeding rack (5). The bottom surface of the guiding sliders (26) is in an inclined slope structure. The guiding sliders (26) are in contact with the rotating pressure sliding rod (24), so that the pressure sliding rod (24) performs intermittent lifting to drive the material removing push plate (23) to clean the scraping vertical plate (22).

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