A duck paw device for pasteurization

Abstract

This invention discloses a pasteurization device for pickled duck feet, relating to the field of pickled duck feet production technology. It includes: a frame; a sterilization tank fixed on the frame; a hot water tank connected to the sterilization tank on one side of the frame; a preheating section and a sterilization section on the sterilization tank; and a cooling box adapted to the preheating section fixed on the frame; and a turning mechanism installed on the sterilization tank, which turns the packaged duck feet over by flipping. This invention utilizes a reciprocating turning plate to turn the packaging bags in the preheating section. This allows the packaging bags in the preheating stage to be turned, and the reciprocating turning continuously changes the gas-liquid distribution inside the packaging bag, ensuring that the gas and broth are evenly mixed and dispersed, and that the thermal expansion pressure is evenly distributed throughout the packaging bag, preventing localized high pressure.

Description

Technical Field

[0001] This invention relates to the field of pickled duck feet production technology, specifically a pasteurization device for pickled duck feet. Background Technology

[0002] Pickled duck feet are a Hakka specialty snack originating from Longyan, Fujian. Now it has become a popular ready-to-eat snack across the country. Made from duck feet, they are pickled at low temperatures with pickled peppers, white vinegar, and spices to infuse flavor. The finished product has crispy skin, chewy tendons, and a tangy and spicy taste. Its core quality is its Q-elastic and crispy texture, and the fact that the collagen has not undergone severe denaturation is the key to its delicious taste.

[0003] In the production chain of pickled duck feet, pasteurization is the core process that determines the safety and shelf life of the product. The complete process is as follows: raw material thawing → cleaning and impurity removal → blanching to remove fishy smell (90℃, 5-8min) → cold water cooling → pickling to infuse flavor (0-4℃, 24-72h) → vacuum packaging (vacuum degree ≥-0.095MPa) → pasteurization → rapid cooling → surface air drying → finished product inspection → warehousing and distribution.

[0004] Currently, in the production process of pickled duck feet, the vacuum-packed products directly enter the pasteurization stage. However, due to the continuous feeding method, the packaging bags are prone to stacking during transportation. When the packaging bags are in close contact with each other and stacked layer by layer, the contact area between the bags forms a relatively closed space, which greatly hinders the effective transfer of heat. This creates significant heat transfer dead zones inside the packaging bags, resulting in uneven heating of the duck feet inside the bags and obvious temperature differences between different parts. Because the heat cannot penetrate evenly to every corner, the temperature in some areas fails to meet the preset sterilization requirements, ultimately leading to incomplete sterilization of microorganisms. To address this, we propose a pasteurization device for pickled duck feet. Summary of the Invention

[0005] The purpose of this invention is to provide a pasteurization device for pickled duck feet to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pasteurization device for pickled duck feet, comprising: A frame, a sterilization tank fixed on the frame, a hot water tank communicating with the sterilization tank on one side of the frame, a preheating section and a sterilization section provided on the sterilization tank, and a cooling box adapted to the preheating section fixed on the frame; and, A turning mechanism installed on the sterilization tank, through the turning of the mechanism, achieves the turning action of the packaged duck feet; and, A material distribution mechanism is installed at the top of the sterilization tank, located on one side of the turning mechanism. The material distribution mechanism is used to intermittently block the duck feet that have been packaged before entering the sterilization section.

[0007] Preferably, the sterilization tank is equipped with a feeding mesh belt and a Z-shaped mesh belt. The feeding mesh belt is located in the preheating section, and the Z-shaped mesh belt is located in the sterilization section. Both the feeding mesh belt and the Z-shaped mesh belt are equipped with a screw tensioning mechanism, which is used to adjust the tension of the feeding mesh belt and the Z-shaped mesh belt and eliminate slippage.

[0008] Preferably, the preheating section includes: a circulating pump fixed at the bottom of the sterilization tank, the input end of the circulating pump being connected to the cooling box via a pipe, a plurality of equally spaced spray pipes being fixed on the sterilization tank, the output end of the circulating pump being connected to the spray pipes via a pipe, and the spray pipes spraying water onto the packaged duck feet on the feeding mesh belt.

[0009] Preferably, the sterilization section includes: two circulating pumps II fixed at the bottom of the sterilization tank, the input end of the circulating pumps II being connected to the sterilization tank via a pipe, a spray pipe II fixed inside the sterilization tank, the spray pipe II being located directly above the Z-shaped mesh belt, and the spray pipe II being connected to the output end of the circulating pumps II via a pipe.

[0010] Preferably, a drain pipe is fixed on the sterilization tank, and a solenoid valve is fixed at the end of the drain pipe away from the sterilization tank. A fan is fixed on the cooling box by a bracket, and the air force generated by the fan cools the hot water entering the cooling box. A liquid level sensor electrically connected to the solenoid valve is fixed inside the cooling box. When the water level in the cooling box is lower than a preset value, the solenoid valve is triggered to open. A temperature control sensor electrically connected to a circulating pump is fixed inside the cooling box. When the temperature in the cooling box reaches a threshold, the circulating pump is triggered to start.

[0011] Preferably, the material turning mechanism includes: a rotating shaft rotatably connected to the sterilization tank, a turning plate fixed on the rotating shaft, a transmission plate fixed at the end of the rotating shaft, and a swing plate rotatably connected to the sterilization tank via a rotating rod, the swing plate having a through groove, a pulley rotatably connected to the transmission plate and slidably connected to the through groove, a rotating shaft rotatably connected to the sterilization tank, a rotating plate fixed at the end of the rotating shaft rotatably connected to the rotating plate and slidably connected to the through groove, and a servo motor fixed on the sterilization tank coaxially with the rotating shaft rotatably fixed.

[0012] Preferably, both sides of the flipping plate are provided with smooth arc surfaces, the opening length of the through groove is greater than the circumference diameter of the rotating plate, and the central axis of the flipping plate is collinear with the central axis of the rotating shaft.

[0013] Preferably, the dispensing mechanism includes: a mounting frame fixed on the sterilization tank, a cylinder hinged to the mounting frame via a rotating seat, a central rod rotatably connected to the sterilization tank, an extrusion plate fixed on the central rod, and a hinge seat fixed on the extrusion plate, the output end of the cylinder being hinged to the hinge seat, a movable plate slidably connected to the sterilization tank, a rod fixed on the movable plate, and a groove slidably connected to the rod on the extrusion plate.

[0014] Preferably, a baffle is provided on one side of the movable plate, a sliding groove is provided on the baffle, and a screw that slides with the sliding groove is threadedly connected to the movable plate. The screw abuts against the baffle. A guide groove is fixed on the sterilization tank, and the movable plate is slidably connected to the guide groove.

[0015] Preferably, a guide plate is fixed inside the sterilization tank, the guide plate is located on one side of the feeding mesh belt, and the guide plate is located directly above the Z-shaped mesh belt.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention employs a stepped heating design, which includes progressively increasing temperature stages. In the initial stage, the packaging is preheated to allow the packaging material to initially adapt to temperature changes, reducing the impact of subsequent rapid temperature increases. During the formal sterilization process, a slow and gradual heating method is used to effectively avoid thermal stress caused by sudden temperature changes, thereby preventing the packaging bag from expanding or deforming due to uneven internal pressure. The gradual heating process allows heat to penetrate more evenly and thoroughly into the center of the duck feet product, ensuring consistent sterilization effects and improving overall processing quality.

[0017] This invention utilizes a reciprocating oscillating turning plate to turn the packaging bags in the preheating section. This turning of the packaging bags during the preheating stage continuously changes the gas-liquid distribution inside the packaging bags, allowing the gas and soup to mix and disperse evenly. The thermal expansion pressure is evenly distributed throughout the packaging bag, preventing localized high pressure.

[0018] This invention employs an intermittent blocking mechanism to prevent packaging bags from entering the sterilization section, thus avoiding the problem of bags sticking tightly and stably when continuously feeding. This solves the problem of multi-layer stacking and the obstruction of the bonding surface, effectively improving the heat uniformity of the packaging bags.

[0019] This invention utilizes waste heat recovery to save energy by using the high-temperature hot water from the sterilization stage as a heat source for the preheating stage after the temperature has been reduced to meet the temperature requirements of the preheating stage. At the same time, the hot water that has completed heat exchange and has been cooled down during the preheating stage is pumped back into the sterilization tank for recirculation and heating, thus realizing a closed-loop recycling of hot water. This not only significantly reduces the amount of fresh water needed and overall energy consumption, but also effectively improves the thermal efficiency of the entire sterilization process through the tiered utilization of heat. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure of region A in the middle; Figure 3 This is a schematic diagram showing the relationship between the material turning mechanism and the material separating mechanism of the present invention; Figure 4 This is a side sectional view of the cooling box and sterilization tank of the present invention; Figure 5 This is a side view of the structure of the present invention; Figure 6 This is a schematic diagram showing the relationship between the material turning plate and the feeding mesh belt of the present invention; Figure 7 for Figure 6 Enlarged schematic diagram of the structure of region B in the middle; Figure 8 This is a schematic diagram showing the relationship between the material distribution mechanism and the feeding conveyor belt of the present invention; Figure 9 for Figure 8 Enlarged schematic diagram of the structure of region C in the middle; Figure 10 This is a schematic diagram showing the relationship between the movable plate and the baffle of the present invention.

[0021] In the diagram: 1. Frame; 2. Sterilization tank; 3. Hot water tank; 4. Preheating section; 5. Sterilization section; 6. Cooling box; 7. Turning mechanism; 8. Distributing mechanism; 9. Feeding conveyor belt; 10. Z-shaped conveyor belt; 11. Screw tensioning mechanism; 12. Circulating pump one; 13. Spray nozzle one; 14. Circulating pump two; 15. Spray nozzle two; 16. Drain pipe; 17. Solenoid valve; 18. Fan; 19. Liquid level sensor; 20. Temperature control sensor; 21. Rotating shaft one; 22. Turning mechanism. 23. Material plate; 24. Transmission plate; 25. Rotating rod; 26. Swing plate; 27. Through groove; 28. Pulley 1; 29. ​​Rotating shaft 2; 30. Rotating plate; 31. Servo motor; 32. Mounting bracket; 33. Rotating seat; 34. Cylinder; 35. Center rod; 36. Hinge seat; 37. Movable plate; 38. Rod body; 39. Groove; 40. Baffle; 41. Slide groove; 42. Screw; 43. Guide groove; 44. Guide plate; 45. Extrusion plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1-10 The illustrated pasteurization device for duck feet includes: a frame 1, a sterilization tank 2 fixed on the frame 1, a hot water tank 3 connected to the sterilization tank 2 on one side of the frame 1, a preheating section 4 and a sterilization section 5 on the sterilization tank 2, and a cooling box 6 adapted to the preheating section 4 fixed on the frame 1; a turning mechanism 7 on the sterilization tank 2, which turns the packaged duck feet; and a distributing mechanism 8 installed on the top of the sterilization tank 2, located on one side of the turning mechanism 7, which intermittently blocks the packaged duck feet before they enter the sterilization section 5.

[0024] In this scheme, the packaged duck feet are preheated in the preheating section 4. After preheating, the packaged duck feet are conveyed to the sterilization section 5. During the preheating stage, the turning mechanism 7 intermittently turns the packaged duck feet to improve the uniformity of the preheating process. In conjunction with the distributing mechanism 8, the packaged duck feet are intermittently blocked, so that the packaged duck feet enter the sterilization section 5 evenly. The sterilization section 5 raises the temperature to the target sterilization temperature.

[0025] Meanwhile, the sterilization tank 2 is equipped with a feeding mesh belt 9 and a Z-shaped mesh belt 10. The feeding mesh belt 9 is located in the preheating section 4, and the Z-shaped mesh belt 10 is located in the sterilization section 5. Both the feeding mesh belt 9 and the Z-shaped mesh belt 10 are equipped with a screw tensioning mechanism 11. The screw tensioning mechanism 11 is used to adjust the tension of the feeding mesh belt 9 and the Z-shaped mesh belt 10 and eliminate slippage. A guide plate 44 is fixed inside the sterilization tank 2. The guide plate 44 is located on one side of the feeding mesh belt 9 and directly above the Z-shaped mesh belt 10. The addition of the guide plate 44 serves to guide the packaged duck feet, ensuring that the packaged duck feet can fall smoothly onto the Z-shaped mesh belt 10.

[0026] In this technical solution, the preheating section 4 includes: a circulation pump 12 fixed at the bottom of the sterilization tank 2, the input end of the circulation pump 12 being connected to the cooling box 6 via a pipe, and several equally spaced spray pipes 13 fixed on the sterilization tank 2, the output end of the circulation pump 12 being connected to the spray pipes 13 via a pipe, and the spray pipes 13 spraying water onto the packaged duck feet on the feeding mesh belt 9; the sterilization section 5 includes: two circulation pumps 24 fixed at the bottom of the sterilization tank 2, the input end of the circulation pumps 24 being connected to the sterilization tank 2 via a pipe, and a spray pipe 25 fixed inside the sterilization tank 2, the spray pipe 25 being located directly above the Z-shaped mesh belt 10, and the spray pipe 25 being connected to the output end of the circulation pumps 24 via a pipe.

[0027] Specifically, the preheating section 4 is set to a temperature of 60℃ and a time of 3 minutes to gradually increase the overall temperature of the packaging bag and the duck feet, reduce the temperature difference between the inside and outside of the bag, reduce the thermal expansion pressure difference, significantly reduce the chance of the bag breaking, eliminate the cold zone of heat transfer, and avoid direct entry into the high-temperature sterilization section 5, which would result in overheating of the surface and insufficient sterilization inside. The temperature of the sterilization zone 5 is set at 78℃ and kept warm for 10 minutes. Duck feet are a high-acid pickled pepper braised product. The 78℃ high-temperature short-time pasteurization can completely kill the nutrients of pathogenic bacteria such as Salmonella, Listeria monocytogenes, and Escherichia coli. At the same time, the temperature is below 85℃, which will not over-hydrolyze the collagen of duck feet and retain the crisp and chewy texture.

[0028] It should be noted that the preheating section 4 and sterilization section 5 in sterilization tank 2 are set with an inclined surface structure. This design allows the hot water after preheating the packaging to flow smoothly back into sterilization tank 2, thereby effectively realizing the recycling of heat energy. At the same time, hot water is continuously supplied into sterilization tank 2 from hot water tank 3 to ensure a stable supply of sterilization medium. Throughout the sterilization process, the system monitors and precisely controls the temperature of the hot water in sterilization section 5 in real time, keeping it within the set temperature range to ensure the stability and consistency of the sterilization effect.

[0029] In this technical solution, the material turning mechanism 7 includes: a rotating shaft 21 rotatably connected to the sterilization tank 2, a turning plate 22 fixed on the rotating shaft 21, a transmission plate 23 fixed at the end of the rotating shaft 21, and a swing plate 25 rotatably connected to the sterilization tank 2 via a rotating rod 24. A through groove 26 is provided on the swing plate 25. A pulley 27 rotatably connected to the transmission plate 23 and slidably connected to the through groove 26 is provided. A rotating shaft 28 rotatably connected to the sterilization tank 2, a rotating plate 29 fixed at the end of the rotating shaft 28, a pulley 30 rotatably connected to the rotating plate 29 and slidably connected to the through groove 26 is provided. A servo motor 31 coaxially fixed to the rotating shaft 28 is fixed on the sterilization tank 2. The turning plate 22 is located on one side of the material distribution mechanism 8. By turning the packaging bags on the feeding mesh belt 9 with the turning plate 22, the heating uniformity of the packaging bags can be improved to a certain extent.

[0030] The flipping plate 22 has smooth arc surfaces on both sides. The side surfaces of the flipping plate 22 can prevent scratching of the packaging bag. The length of the through groove 26 is greater than the circumference diameter of the rotating plate 29. The through groove 26 ensures that the rotating shaft 21 maintains a certain angle of reciprocating swing motion after being subjected to force. The central axis of the flipping plate 22 is collinear with the central axis of the rotating shaft 21.

[0031] The principle of the flipping mechanism 7 for flipping the packaging bags on the feeding mesh belt 9 is as follows: Driven by the servo motor 31, the rotating shaft 28 rotates synchronously, driving the rotating plate 29 to rotate. Utilizing the squeezing transmission action of the pulley 30 and the through groove 26, the swing plate 25 is subjected to force and reciprocates along the axis of the rotating rod 24. Utilizing the squeezing transmission action of the swing plate 25 and the pulley 27, the rotating shaft 21 and the flipping plate 22 are driven to reciprocate, thereby realizing the operation of flipping the packaging bags on the feeding mesh belt 9.

[0032] In this technical solution, the material distribution mechanism 8 includes: a mounting frame 32 fixed on the sterilization tank 2, a cylinder 34 hinged to the mounting frame 32 via a rotating seat 33, a central rod 35 rotatably connected to the sterilization tank 2, a pressing plate 45 fixed on the central rod 35, and a hinge seat 36 fixed on the pressing plate 45, the output end of the cylinder 34 being hinged to the hinge seat 36, a movable plate 37 slidably connected to the sterilization tank 2, a rod 38 fixed on the movable plate 37, a groove 39 slidably connected to the rod 38 on the pressing plate 45, a guide groove 43 fixed on the sterilization tank 2, and the movable plate 37 slidably connected to the guide groove 43. The addition of the guide groove 43 serves to guide the movable plate 37, thereby improving the stability of the movable plate 37 when it moves under force.

[0033] The movable plate 37 has a baffle 40 on one side, and a sliding groove 41 is provided on the baffle 40. The movable plate 37 is threaded with a screw 42 that slides with the sliding groove 41. The screw 42 abuts against the baffle 40. By adding the sliding rod and the screw 42, the distance between the baffle 40 and the movable plate 37 can be adjusted according to the needs, so that it can be used to block packaging bags of different thicknesses.

[0034] It should be noted that the material distribution mechanism 8 is located at the end of the feeding mesh belt 9. It intermittently blocks the preheated packaging bags to ensure that the packaging bags fall evenly onto the Z-shaped mesh belt 10, preventing the packaging bags from accumulating in the sterilization section 5 and affecting the incomplete heat conduction.

[0035] The principle of intermittent blocking of packaging bags using the material distribution mechanism 8 is as follows: the reciprocating contraction motion of the output end of the cylinder 34 causes the extrusion plate 45 to swing back and forth along the axis of the central rod 35 after being subjected to force. Utilizing the extrusion transmission action of the groove 39 and the rod 38, the movable plate 37 is subjected to force and moves back and forth along the guide groove 43, thereby driving the baffle 40 to move synchronously, achieving the purpose of intermittent blocking of packaging bags.

[0036] Example 2: Please refer to Figure 4 This embodiment further explains the first embodiment, the difference being that the hot water in the sterilization tank 2 is recycled and reused, saving energy.

[0037] Specifically, a drain pipe 16 is fixed on the sterilization tank 2, and a solenoid valve 17 is fixed at the end of the drain pipe 16 away from the sterilization tank 2. A fan 18 is fixed on the cooling box 6 by a bracket. The air force generated by the fan 18 cools the hot water entering the cooling box 6. A liquid level sensor 19 electrically connected to the solenoid valve 17 is fixed inside the cooling box 6. When the water level in the cooling box 6 is lower than the preset value, the solenoid valve 17 is triggered to open. A temperature control sensor 20 electrically connected to the circulation pump 12 is fixed inside the cooling box 6. When the temperature in the cooling box 6 reaches the threshold, the circulation pump 12 is triggered to start.

[0038] The hot water inside the sterilization tank 2 is fed into the cooling box 6 through the drain pipe 16. The cooling box 6 acts as a turning point, and with the wind force generated by the fan 18, the temperature of the hot water entering the cooling box 6 is reduced. When the temperature inside the cooling box 6 reaches the threshold of the temperature control sensor 20, the circulation pump 12 is triggered to start. The circulation pump 12 pressurizes the hot water in the cooling box 6 and inputs it into the preheating section 4.

[0039] Meanwhile, when the liquid level in the cooling box 6 is too high, the liquid level sensor 19 sends a command to the solenoid valve 17 to drive the solenoid valve 17 to close, stopping the supply of hot water to the cooling box 6, and using hot water diversion to realize the hot water circulation between the preheating section 4 and the sterilization section 5.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A duck paw device for pasteurization, characterized in that, include: A frame (1), a sterilization tank (2) fixed on the frame (1), a hot water tank (3) connected to the sterilization tank (2) on one side of the frame (1), a preheating section (4) and a sterilization section (5) on the sterilization tank (2), and a cooling box (6) adapted to the preheating section (4) fixed on the frame (1); and, A turning mechanism (7) installed on the sterilization tank (2) is used to turn the packaged duck feet over; and, The material distribution mechanism (8) is installed on the top of the sterilization tank (2). The material distribution mechanism (8) is located on one side of the turning mechanism (7). The material distribution mechanism (8) is used to intermittently block the duck feet that have been packaged before entering the sterilization section (5).

2. The duck claw pasteurization device according to claim 1, characterized in that: The sterilization tank (2) is equipped with a feeding mesh belt (9) and a Z-shaped mesh belt (10). The feeding mesh belt (9) is located in the preheating section (4), and the Z-shaped mesh belt (10) is located in the sterilization section (5). Both the feeding mesh belt (9) and the Z-shaped mesh belt (10) are equipped with a screw tensioning mechanism (11). The screw tensioning mechanism (11) is used to adjust the tension of the feeding mesh belt (9) and the Z-shaped mesh belt (10) and eliminate slippage.

3. The duck claw pasteurization device according to claim 2, characterized in that: The preheating section (4) includes: a circulation pump (12) fixed at the bottom of the sterilization tank (2), the input end of the circulation pump (12) is connected to the cooling box (6) through a pipe, and several equally spaced spray pipes (13) are fixed on the sterilization tank (2). The output end of the circulation pump (12) is connected to the spray pipes (13) through a pipe, and the spray pipes (13) spray water onto the packaged duck feet on the feeding mesh belt (9).

4. The pasteurization device for pickled duck feet according to claim 2, characterized in that: The sterilization section (5) includes two circulating pumps (14) fixed at the bottom of the sterilization tank (2). The input end of the circulating pump (14) is connected to the sterilization tank (2) through a pipe. A spray pipe (15) is fixed inside the sterilization tank (2). The spray pipe (15) is located directly above the Z-shaped mesh belt (10). The spray pipe (15) is connected to the output end of the circulating pump (14) through a pipe.

5. The pasteurization device for pickled duck feet according to claim 3, characterized in that: A drain pipe (16) is fixed on the sterilization tank (2), and a solenoid valve (17) is fixed at the end of the drain pipe (16) away from the sterilization tank (2). A fan (18) is fixed on the cooling box (6) by a bracket. The wind generated by the fan (18) cools the hot water entering the cooling box (6). A liquid level sensor (19) electrically connected to the solenoid valve (17) is fixed inside the cooling box (6). When the water level in the cooling box (6) is lower than the preset value, the solenoid valve (17) is triggered to open. A temperature control sensor (20) electrically connected to the circulating pump (12) is fixed inside the cooling box (6). When the temperature in the cooling box (6) reaches the threshold, the circulating pump (12) is triggered to start.

6. The pasteurization device for pickled duck feet according to claim 1, characterized in that: The material turning mechanism (7) includes: a rotating shaft (21) rotatably connected to the sterilization tank (2), a turning plate (22) fixed on the rotating shaft (21), a transmission plate (23) fixed at the end of the rotating shaft (21), and a swing plate (25) rotatably connected to the sterilization tank (2) via a rotating rod (24). A through groove (26) is provided on the swing plate (25). A pulley (27) rotatably connected to the transmission plate (23) and slidably connected to the through groove (26) is provided. A rotating shaft (28) rotatably connected to the sterilization tank (2), a rotating plate (29) fixed at the end of the rotating shaft (28), a pulley (30) rotatably connected to the rotating plate (29) and slidably connected to the through groove (26) is provided. A servo motor (31) coaxially fixed to the rotating shaft (28) is fixed on the sterilization tank (2).

7. The pasteurization device for pickled duck feet according to claim 6, characterized in that: The two sides of the flipping plate (22) are both set with smooth arc surfaces. The opening length of the through groove (26) is greater than the circumferential diameter of the rotating plate (29). The central axis of the flipping plate (22) is collinear with the central axis of the rotating shaft (21).

8. The pasteurization device for pickled duck feet according to claim 1, characterized in that: The material dispensing mechanism (8) includes: a mounting frame (32) fixed on the sterilization tank (2), a cylinder (34) hinged on the mounting frame (32) via a rotating seat (33), a central rod (35) rotatably connected to the sterilization tank (2), an extrusion plate (45) fixed on the central rod (35), and a hinge seat (36) fixed on the extrusion plate (45). The output end of the cylinder (34) is hinged to the hinge seat (36). A movable plate (37) is slidably connected to the sterilization tank (2), a rod body (38) is fixed on the movable plate (37), and a groove (39) is provided on the extrusion plate (45) that is slidably connected to the rod body (38).

9. The pasteurization device for pickled duck feet according to claim 8, characterized in that: A baffle (40) is provided on one side of the movable plate (37). A sliding groove (41) is provided on the baffle (40), and a screw (42) that slides with the sliding groove (41) is threadedly connected to the movable plate (37). The screw (42) abuts against the baffle (40). A guide groove (43) is fixed on the sterilization tank (2), and the movable plate (37) is slidably connected to the guide groove (43).

10. The pasteurization device for pickled duck feet according to claim 2, characterized in that: The sterilization tank (2) is fixed with a guide plate (44), which is located on one side of the feed mesh belt (9) and directly above the Z-shaped mesh belt (10).

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