High-pressure continuous sterilization device and method suitable for large-scale production of prefabricated vegetables

Abstract

The invention relates to the field of processing of prefabricated vegetables, in particular to a high-pressure continuous sterilization device and method suitable for large-scale production of the prefabricated vegetables, the high-pressure continuous sterilization device comprises a box body, square holes are formed in the two sides of the box body, an inner cavity of the box body is connected with a first conveying belt through a supporting block, and the inner wall of the box body is fixedly connected with a partition plate; a through hole is formed in the surface of the partition plate, a first sealing door is arranged in an inner cavity of the through hole, second sealing doors are arranged on the two sides of the inner cavity of the box body, and a pressurizing pipe is connected to the rear side of the inner wall of the box body. The box body is divided into the three sterilization cabins through the partition plates, continuous processing is achieved, prefabricated dishes sterilized in the first sterilization cabin can be output in time, new to-be-sterilized prefabricated dishes can immediately enter the subsequent sterilization cabins, the idle time of equipment in batches is shortened, the prefabricated dish handling capacity in unit time is greatly increased, and the production efficiency is improved. The requirements of large-scale production of the prefabricated vegetables are met.

Description

Technical Field

[0001] This invention relates to the field of pre-prepared food processing, and more specifically, to a high-pressure continuous sterilization device and method suitable for large-scale production of pre-prepared foods. Background Technology

[0002] Pre-prepared meals are finished or semi-finished dishes that have been pre-processed or pre-cooked and pre-packaged. They use agricultural, livestock, poultry, and aquatic products as main ingredients, undergo a series of industrial processes, and are ready to eat after opening, such as eight-treasure porridge, ready-to-eat canned goods, and ready-to-eat braised dishes. These products undergo strict sterilization and can be stored for a long time under suitable conditions, making them convenient for consumers to eat anytime, anywhere.

[0003] With the booming development of the prepared food industry, large-scale production has become key to meeting market demand. Traditional sterilization methods for prepared food often employ batch processing, where a certain amount of prepared food is placed in sterilization equipment, and after one sterilization process, it is removed and new prepared food is placed in for the next batch. The equipment has a lot of idle time between batches, resulting in low overall production efficiency and making it difficult to meet the needs of large-scale continuous production. The heat and pressure conditions of prepared food in different locations may vary, further affecting the uniformity and stability of the sterilization effect.

[0004] Therefore, we have made improvements to this and proposed a high-pressure continuous sterilization device and method suitable for the large-scale production of pre-prepared dishes. Summary of the Invention

[0005] The purpose of this invention is to address the problem that existing sterilization devices are unable to meet the needs of large-scale continuous production, and that it is difficult to accurately control the heating and pressure conditions of pre-cooked dishes in different locations.

[0006] To achieve the above-mentioned objectives, the present invention provides a high-pressure continuous sterilization device and method suitable for large-scale production of pre-prepared dishes, thereby improving the aforementioned problems.

[0007] The application is as follows: A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes includes a chamber with square holes on both sides. A first conveyor belt is connected to the inner cavity of the chamber via support blocks. A partition is fixedly connected to the inner wall of the chamber, and a through hole is formed on the surface of the partition. A first sealing door is provided within the cavity of the through hole. Second sealing doors are provided on both sides of the inner cavity of the chamber. A pressure pipe is connected to the rear side of the inner wall of the chamber, and a pressure regulating valve is connected to the rear side of the pressure pipe. A pneumatic pipe is connected to the rear side of the pressure regulating valve, and an air pump is connected to the surface of the pneumatic pipe via a pipe. A pneumatic sensor is connected through the top of the inner wall of the chamber, and a heating pipe is fixedly connected to the top of the inner wall of the chamber.

[0008] As a preferred technical solution of this application, one side of the air pump is connected to the housing, the air inlet of the air pump is connected to the pressurization device through a pipe, and a temperature sensor is connected through the top of the inner wall of the housing. There are three air pressure sensors and three temperature sensors.

[0009] As a preferred technical solution of this application, the number of pressure regulating valves is several, and three pressure regulating valves are independently controlled. The two sides of the box are connected to a second conveyor belt through a bracket, and an electrical control box is connected to the surface of the box.

[0010] As a preferred technical solution of this application, a first electric push rod is connected to one side of the first sealing door via a support block, and the top of the first electric push rod is fixedly connected to the top of the inner wall of the box. A second electric push rod is connected to one side of the second sealing door via a support block, and the top of the second electric push rod is fixedly connected to the top of the inner wall of the partition.

[0011] As a preferred technical solution of this application, a spray pipe is connected to the top of the inner wall of the box, a nozzle is connected to the bottom of the spray pipe, an electric liquid inlet valve is connected to the top of the spray pipe, a liquid inlet pipe is connected to the top of the electric liquid inlet valve, and a first liquid pump is connected to the surface of the liquid inlet pipe through a pipeline.

[0012] As a preferred technical solution of this application, the bottom of the inner wall of the box is connected to a liquid collection tank, the bottom of the liquid collection tank is connected to a liquid outlet pipe, and the surface of the liquid outlet pipe is connected to a filter mechanism through a pipe. The filter mechanism includes a second liquid pump, one side of the liquid outlet pipe is connected to the second liquid pump, one side of the second liquid pump is connected to a filter box, the liquid outlet end of the second liquid pump is connected to the top of the filter box, and the inner cavity of the filter box is respectively provided with a filter plate and an activated carbon adsorption plate.

[0013] As a preferred technical solution of this application, the front sides of the filter plate and the activated carbon adsorption plate extend to the outside of the box and are fixedly connected to a sealing plate. The sealing plate is connected to the filter box by bolts. Both sides of the inner wall of the filter box are fixedly connected to a pad, and the top of the pad contacts the bottom of the activated carbon adsorption plate.

[0014] As a preferred technical solution of this application, a motor is connected to the bottom of the box, the motor shaft passes through the inner cavity of the filter box and is connected to a vertical rod, and a stirring plate is fixedly connected to the surface of the vertical rod.

[0015] As a preferred technical solution of this application, the surface of the filter box is connected to a feeding door via a rotating shaft, and the bottom right side of the filter box is connected to an electric drain valve.

[0016] A method for using a high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes includes the following steps; S1. Place the packaged pre-cooked food on a tray, then place the tray on the second conveyor belt. The control box controls the second electric push rod to retract, causing the second sealing door to move upward, exposing the square hole. The second conveyor belt transports the tray and food to the first conveyor belt on the left. By controlling the operation of the air pump and pressurizing equipment, the pressure regulating valve is opened to inject pressure into the inner cavity of the box, controlling the pressure value on the left side of the inner cavity of the box to be 200MPa. The air pressure sensor detects the pressure value and sends the data to the control box. The display screen on the surface of the control box displays the data. The heating tube is controlled to heat the inner cavity of the box, thereby sterilizing the food on the tray. S2. After the first stage of sterilization, the first electric push rod is controlled to move the first sealing door upward, opening the through hole. The food is then transported to the right by the first conveyor belt on the left and onto the first conveyor belt in the middle. Then, the first sealing door is controlled to move downward and close. The air pressure in the middle chamber of the box is adjusted to 400MPa to sterilize the food. S3. After the second stage of sterilization, the first electric push rod is controlled to move the first sealing door upward, opening the through hole. The food is then transported to the right by the first conveyor belt in the middle and onto the first conveyor belt on the right side. Then, the first sealing door is controlled to move downward and close. The air pressure in the middle chamber of the box is adjusted to 600MPa to sterilize the food.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. To address the challenges of existing sterilization equipment failing to meet the demands of large-scale continuous production and the difficulty in precisely controlling the heating and pressure conditions of pre-prepared dishes at different locations, this application divides the chamber into three sterilization compartments using partitions. This enables continuous processing, allowing pre-prepared dishes sterilized in the first sterilization compartment to be output promptly, while new pre-prepared dishes awaiting sterilization can immediately enter subsequent sterilization compartments. This reduces the idle time between batches, significantly increases the pre-prepared dish processing capacity per unit time, and meets the needs of large-scale pre-prepared dish production.

[0018] 2. This application can independently control the air pressure of a single sterilization chamber. It can precisely adjust the air pressure parameters of each sterilization chamber according to the characteristics, packaging form and sterilization requirements of different pre-prepared dishes, control the step-by-step increase of air pressure in each sterilization chamber, reduce pressure shock, and realize the linkage of pressure parameters of multiple chambers. Different chambers can be set with different pressures and holding times, which can adapt to the simultaneous production of a variety of pre-prepared dish products.

[0019] 3. This application, by setting up a spray pipe, nozzle, electric inlet valve, inlet pipe and first liquid pump, can conveniently spray cleaning liquid into the tank to clean the inside of the device, keep the inside of the device clean and hygienic, prevent bacterial growth from affecting the quality of pre-cooked food, and the electric inlet valve can control the amount of cleaning liquid entering, adjust the flow rate according to the actual cleaning needs, improve the cleaning effect while avoiding waste of cleaning liquid. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the rear view structure of this application; Figure 3 This is a schematic diagram of the structure viewed from below in this application; Figure 4 This is a cross-sectional view of the present application; Figure 5 This is a cross-sectional schematic diagram of the partition and the first sealing door of this application; Figure 6 This is a cross-sectional schematic diagram of the filter plate and activated carbon adsorption plate of this application.

[0021] The image shows: 1. Housing; 2. Square hole; 3. First conveyor belt; 4. Partition plate; 5. Through hole; 6. First sealing door; 7. Second sealing door; 8. Pressurization pipe; 9. Pressure regulating valve; 10. Air pressure pipe; 11. Air pump; 12. Air pressure sensor; 13. Heating pipe; 14. Temperature sensor; 15. Second conveyor belt; 16. Electrical control box; 17. First electric push rod; 18. Second electric push rod; 19. Nozzle; 20. 21. Nozzle; 22. Electric inlet valve; 23. Inlet pipe; 24. First liquid pump; 25. Collection tank; 26. Outlet pipe; 27. Filtration mechanism; 28. Second liquid pump; 29. ​​Filter box; 20. Filter plate; 20. Activated carbon adsorption plate; 21. Sealing plate; 22. Pad plate; 23. Motor; 24. Vertical rod; 25. Stirring plate; 266. Feeding gate; 277. Electric drain valve. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0023] Please refer to Figures 1-5A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes includes a box body 1. Square holes 2 are provided on both sides of the box body 1. A first conveyor belt 3 is connected to the inner cavity of the box body 1 through a support block. A partition 4 is fixedly connected to the inner wall of the box body 1. A through hole 5 is provided on the surface of the partition 4. A first sealing door 6 is provided in the inner cavity of the through hole 5. A second sealing door 7 is provided on both sides of the inner cavity of the box body 1. A pressure pipe 8 is connected to the rear side of the inner wall of the box body 1. A pressure regulating valve 9 is connected to the rear side of the pressure pipe 8. A pressure pipe 10 is connected to the rear side of the pressure regulating valve 9. An air pump 11 is connected to the surface of the air pump 10 through a pipe. A pressure sensor 12 is connected through the top of the inner wall of the box body 1. A heating pipe 13 is fixedly connected to the top of the inner wall of the box body 1.

[0024] This invention divides the chamber 1 into three sterilization chambers using partitions 4, enabling continuous processing. Pre-cooked dishes sterilized in the first chamber can be output promptly, while new pre-cooked dishes awaiting sterilization can immediately enter subsequent chambers. This reduces equipment downtime between batches, significantly increasing the pre-cooked dish processing capacity per unit time and meeting the needs of large-scale pre-cooked dish production. The invention allows independent control of the air pressure in each sterilization chamber, precisely adjusting the air pressure parameters according to the characteristics, packaging, and sterilization requirements of different pre-cooked dishes. It controls the step-by-step increase of air pressure in each chamber, reducing pressure shocks. Multiple chambers can achieve pressure parameter linkage, and different chambers can be set with different pressures and holding times, adapting to the simultaneous production of various pre-cooked dish products.

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] Example 1, please refer to Figures 1-5 A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes includes a box body 1. Square holes 2 are provided on both sides of the box body 1. A first conveyor belt 3 is connected to the inner cavity of the box body 1 through a support block. A partition 4 is fixedly connected to the inner wall of the box body 1. A through hole 5 is provided on the surface of the partition 4. A first sealing door 6 is provided in the inner cavity of the through hole 5. A second sealing door 7 is provided on both sides of the inner cavity of the box body 1. A pressure pipe 8 is connected to the rear side of the inner wall of the box body 1. A pressure regulating valve 9 is connected to the rear side of the pressure pipe 8. A pressure pipe 10 is connected to the rear side of the pressure regulating valve 9. An air pump 11 is connected to the surface of the air pump 10 through a pipe. A pressure sensor 12 is connected through the top of the inner wall of the box body 1. A heating pipe 13 is fixedly connected to the top of the inner wall of the box body 1.

[0027] The chamber 1 is divided into three sterilization chambers by partition 4, enabling continuous processing. Pre-cooked dishes that have been sterilized in the first sterilization chamber can be output in a timely manner, while new pre-cooked dishes awaiting sterilization can immediately enter the subsequent sterilization chambers. This reduces the idle time of the equipment between batches, greatly increases the pre-cooked dish processing capacity per unit time, and meets the needs of large-scale pre-cooked dish production. The air pressure of each sterilization chamber can be independently controlled. According to the characteristics, packaging form and sterilization requirements of different pre-cooked dishes, the air pressure parameters of each sterilization chamber can be precisely adjusted to control the step-by-step increase of air pressure in each sterilization chamber, reducing pressure shock. Multiple chambers can achieve pressure parameter linkage, and different chambers can be set with different pressures and holding times, adapting to the simultaneous production of various pre-cooked dish products.

[0028] One side of the air pump 11 is connected to the chamber 1. The air inlet of the air pump 11 is connected to the pressurization device through a pipe. A temperature sensor 14 is connected through the top of the inner wall of the chamber 1. There are three air pressure sensors 12 and three temperature sensors 14. The three air pressure sensors 12 and the three temperature sensors 14 correspond to the three sterilization chambers respectively. They can monitor the air pressure and temperature in each sterilization chamber in real time and accurately, providing data support for precise control of sterilization conditions and ensuring stable and reliable sterilization effect.

[0029] There are several pressure regulating valves 9, and three pressure regulating valves 9 are independently controlled. The two sides of the box body 1 are connected to the second conveyor belt 15 through the bracket. The surface of the box body 1 is connected to the electrical control box 16. The three independently controlled pressure regulating valves 9 can more flexibly and accurately adjust the air pressure of each sterilization chamber to meet the diverse sterilization air pressure requirements of different pre-prepared dishes. The second conveyor belt 15 facilitates the entry and exit of pre-prepared dishes. The electrical control box 16 can centrally control the operation of the entire device to realize automated production and improve production efficiency and ease of operation.

[0030] A first electric push rod 17 is connected to one side of the first sealing door 6 via a support block. The top of the first electric push rod 17 is fixedly connected to the top of the inner wall of the chamber 1. A second electric push rod 18 is connected to one side of the second sealing door 7 via a support block. The top of the second electric push rod 18 is fixedly connected to the top of the inner wall of the partition 4. The first electric push rod 17 and the second electric push rod 18 can realize the automatic opening and closing of the first sealing door 6 and the second sealing door 7, improve the automation level of the production process, reduce manual operation, reduce labor intensity, and accurately control the movement position of the sealing door to ensure that the sealing door can effectively seal the sterilization chamber when closed, prevent air pressure leakage during sterilization, and ensure the sterilization effect.

[0031] A spray pipe 19 is connected to the top of the inner wall of the housing 1. A nozzle 20 is connected to the bottom of the spray pipe 19. An electric liquid inlet valve 21 is connected to the top of the spray pipe 19. An inlet pipe 22 is connected to the top of the electric liquid inlet valve 21. A first liquid pump 23 is connected to the surface of the inlet pipe 22 through a pipe. By setting up the spray pipe 19, nozzle 20, electric liquid inlet valve 21, inlet pipe 22 and first liquid pump 23, cleaning liquid can be easily sprayed into the housing 1 to clean the inside of the device, keep the inside of the device clean and hygienic, prevent bacterial growth and affect the quality of pre-cooked food. The electric liquid inlet valve 21 can control the amount of cleaning liquid entering and adjust the flow rate according to the actual cleaning needs to improve the cleaning effect while avoiding waste of cleaning liquid.

[0032] Example 2 further optimizes the high-pressure continuous sterilization device for large-scale production of pre-prepared dishes provided in Example 1. Specifically, as follows: Figure 1 , Figure 3 and Figure 6 As shown, the bottom of the inner wall of the box 1 is connected to a liquid collection tank 24, and the bottom of the liquid collection tank 24 is connected to a liquid outlet pipe 25. The surface of the liquid outlet pipe 25 is connected to a filter mechanism 26 through a pipe. The filter mechanism 26 includes a second liquid pump 260. One side of the liquid outlet pipe 25 is connected to the second liquid pump 260, and one side of the second liquid pump 260 is connected to a filter box 261. The liquid outlet end of the second liquid pump 260 is connected to the top of the filter box 261. The inner cavity of the filter box 261 is respectively equipped with a filter plate 262 and an activated carbon adsorption plate 263. The liquid collection tank 24 and the liquid outlet pipe 25 can collect the waste liquid after cleaning and discharge it from the device, preventing the waste liquid from accumulating in the device and affecting the normal operation of the device and the hygiene of the pre-cooked food. The filter plate 262 and the activated carbon adsorption plate 263 can filter and adsorb the waste liquid, remove impurities and odors from the waste liquid, reduce the pollution of the waste liquid to the environment, and achieve the initial purification of the waste liquid.

[0033] The front sides of the filter plate 262 and the activated carbon adsorption plate 263 extend to the outside of the housing 1 and are fixedly connected to a sealing plate 264. The sealing plate 264 is connected to the filter box 261 by bolts. Both sides of the inner wall of the filter box 261 are fixedly connected to a pad 265. The top of the pad 265 contacts the bottom of the activated carbon adsorption plate 263. The sealing plate 264 is connected to the filter box 261 by bolts, which facilitates disassembly and replacement. When the filter components reach the end of their service life or the filtration effect decreases, they can be replaced in time to ensure the normal operation of the filter mechanism 26. The pad 265 can provide stable support for the activated carbon adsorption plate 263 to prevent it from shaking or shifting during the filtration process and to ensure the filtration effect.

[0034] A motor 266 is connected to the bottom of the housing 1. The shaft of the motor 266 passes through the inner cavity of the filter box 261 and is connected to a vertical rod 267. A stirring plate 268 is fixedly connected to the surface of the vertical rod 267. The motor 266 drives the stirring plate 268 to rotate, which can stir the waste liquid in the filter box 261, so that the waste liquid and the purified liquid can be fully contacted, thereby improving the purification effect and the chemical reaction speed.

[0035] The surface of the filter box 261 is connected to the feeding door 269 via a rotating shaft. The bottom right side of the filter box 261 is connected to an electric drain valve 270. The feeding door 269 is designed to facilitate the addition of disinfectant and flocculant treatment agents into the filter box 261 for further treatment of waste liquid and to improve the degree of waste liquid purification. The electric drain valve 270 can realize the automatic discharge of purified waste liquid, improve the automation level of the production process, and facilitate operation and management.

[0036] The present invention provides a method for using a high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes, as follows: S1. Place the packaged pre-cooked food on a tray and place the tray on the second conveyor belt 15. The electrical control box 16 controls the second electric push rod 18 to retract, causing the second sealing door 7 to move upward, so that the square hole 2 is exposed. The second conveyor belt 15 transports the tray and food to the first conveyor belt 3 on the left. By controlling the operation of the air pump 11 and the pressurizing equipment, the pressure regulating valve 9 is opened to inject pressure into the inner cavity of the box 1. The pressure value on the left side of the inner cavity of the box 1 is controlled to be 200MPa. The air pressure sensor 12 detects the pressure value and sends the data to the electrical control box 16. The display screen on the surface of the electrical control box 16 displays the data. The heating tube 13 is controlled to heat the inner cavity of the box 1, thereby sterilizing the food on the tray. S2. After the first stage of sterilization, the first electric push rod 17 is controlled to move the first sealing door 6 upward, so that the through hole 5 is opened. The food is transported to the right by the first conveyor belt 3 on the left and transported to the first conveyor belt 3 in the middle. Then, the first sealing door 6 is controlled to move downward and close. The air pressure in the middle chamber of the box 1 is adjusted to 400MPa to sterilize the food. S3. After the second stage of sterilization, the first electric push rod 17 is controlled to move the first sealing door 6 upward, so that the through hole 5 is opened. The food is transported to the right by the first conveyor belt 3 in the middle and then to the first conveyor belt 3 on the right side. Then the first sealing door 6 is controlled to move downward and close. The air pressure in the middle chamber of the box 1 is adjusted to 600MPa to sterilize the food. S4. After sterilization is completed, the second sealing door 7 is moved upward and opened by controlling the second electric push rod 18 on the right side, so that the food is transported to the outside of the box 1. The food on the left side of the box 1 can be continuously sterilized.

[0037] S5. When cleaning the inside of the tank 1, the first liquid pump 23 is controlled to run to draw external cleaning liquid. The cleaning liquid is sprayed into the inner cavity of the tank 1 through the first liquid pump 23, the inlet pipe 22, the electric inlet valve 21, the spray pipe 19 and the nozzle 20 to clean the inner cavity of the tank 1. The cleaning liquid flows into the collection tank 24 and the second liquid pump 260 is controlled to transport waste liquid. The waste liquid enters the inner cavity of the filter box 261 through the outlet pipe 25 and the second liquid pump 260. The waste liquid can be filtered and adsorbed by the filter plate 262 and the activated carbon adsorption plate 263 to remove impurities and odors from the waste liquid, reduce the pollution of the waste liquid to the environment, and achieve preliminary purification of the waste liquid. The feeding door 269 is opened to add purification liquid into the inner cavity of the filter box 261. The motor 266 is controlled to run to drive the vertical rod 267 and the stirring plate 268 to rotate, so that the purification liquid reacts fully with the sewage and improves the purification effect of the sewage. After purification is completed, the sewage is discharged by opening the electric drain valve 270.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes, characterized in that, The box includes a housing (1), with square holes (2) on both sides. The inner cavity of the housing (1) is connected to a first conveyor belt (3) via a support block. A partition (4) is fixedly connected to the inner wall of the housing (1). A through hole (5) is opened on the surface of the partition (4). A first sealing door (6) is provided in the inner cavity of the through hole (5). A second sealing door (7) is provided on both sides of the inner cavity of the housing (1). A pressurizing pipe (8) is connected to the rear side of the inner wall of the housing (1). A pressure regulating valve (9) is connected to the rear side of the pressurizing pipe (8). A pneumatic pipe (10) is connected to the rear side of the pressure regulating valve (9). An air pump (11) is connected to the surface of the pneumatic pipe (10) via a pipe. A pneumatic sensor (12) is connected through the top of the inner wall of the housing (1). A heating pipe (13) is fixedly connected to the top of the inner wall of the housing (1).

2. The high-pressure continuous sterilization device suitable for large-scale production of pre-prepared vegetables according to claim 1, characterized in that, One side of the air pump (11) is connected to the housing (1). The air inlet of the air pump (11) is connected to the pressurization device through a pipe. A temperature sensor (14) is connected through the top of the inner wall of the housing (1). There are three air pressure sensors (12) and three temperature sensors (14).

3. The high-pressure continuous sterilization device for large-scale production of pre-prepared vegetables according to claim 1, characterized in that, The number of pressure regulating valves (9) is several, and the three pressure regulating valves (9) are controlled independently. The two sides of the box (1) are connected to the second conveyor belt (15) through the bracket. The surface of the box (1) is connected to the electrical control box (16).

4. The high-pressure continuous sterilization device suitable for large-scale production of pre-prepared vegetables according to claim 1, characterized in that, The first sealing door (6) is connected to a first electric push rod (17) via a support block on one side. The top of the first electric push rod (17) is fixedly connected to the top of the inner wall of the box (1). The second sealing door (7) is connected to a second electric push rod (18) via a support block on one side. The top of the second electric push rod (18) is fixedly connected to the top of the inner wall of the partition (4).

5. A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes according to claim 1, characterized in that, The top of the inner wall of the housing (1) is connected to a nozzle (19), the bottom of the nozzle (19) is connected to a nozzle (20), the top of the nozzle (19) is connected to an electric liquid inlet valve (21), the top of the electric liquid inlet valve (21) is connected to a liquid inlet pipe (22), and the surface of the liquid inlet pipe (22) is connected to a first liquid pump (23) through a pipe.

6. The high-pressure continuous sterilization device suitable for large-scale production of pre-prepared vegetables according to claim 1, characterized in that, The bottom of the inner wall of the box (1) is connected to a liquid collection tank (24), the bottom of the liquid collection tank (24) is connected to a liquid outlet pipe (25), and the surface of the liquid outlet pipe (25) is connected to a filter mechanism (26) through a pipe. The filter mechanism (26) includes a second liquid pump (260), one side of the liquid outlet pipe (25) is connected to the second liquid pump (260), one side of the second liquid pump (260) is connected to a filter box (261), the liquid outlet end of the second liquid pump (260) is connected to the top of the filter box (261), and the inner cavity of the filter box (261) is respectively provided with a filter plate (262) and an activated carbon adsorption plate (263).

7. A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared vegetables according to claim 6, characterized in that, The front sides of the filter plate (262) and the activated carbon adsorption plate (263) extend to the outside of the box body (1) and are fixedly connected to a sealing plate (264). The sealing plate (264) is connected to the filter box (261) by bolts. Both sides of the inner wall of the filter box (261) are fixedly connected to a pad (265). The top of the pad (265) is in contact with the bottom of the activated carbon adsorption plate (263).

8. A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes according to claim 6, characterized in that, The bottom of the box (1) is connected to a motor (266), the shaft of the motor (266) passes through the inner cavity of the filter box (261) and is connected to a vertical rod (267), and a stirring plate (268) is fixedly connected to the surface of the vertical rod (267).

9. A high-pressure continuous sterilization device suitable for large-scale production of pre-prepared vegetables according to claim 6, characterized in that, The surface of the filter box (261) is connected to the feeding door (269) via a rotating shaft, and the bottom right side of the filter box (261) is connected to an electric drain valve (270).

10. A method of using a high-pressure continuous sterilization device suitable for large-scale production of pre-prepared dishes according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the packaged pre-cooked food on a tray and place the tray on the second conveyor belt (15). The control box (16) controls the second electric push rod (18) to retract and drive the second sealing door (7) to move upward, so that the square hole (2) is exposed. The second conveyor belt (15) transports the tray and food to the first conveyor belt (3) on the left. By controlling the operation of the air pump (11) and the pressurizing equipment, the pressure regulating valve (9) is opened to inject pressure into the inner cavity of the box (1). The pressure value on the left side of the inner cavity of the box (1) is controlled to be 200MPa. The air pressure sensor (12) detects the pressure value and sends the data to the control box (16). The display screen on the surface of the control box (16) displays the data. By controlling the heating tube (13) to heat the inner cavity of the box (1), the food on the tray is sterilized. S2. After the first stage of sterilization, the first electric push rod (17) is controlled to move the first sealing door (6) upward, so that the through hole (5) is opened. The food is transported to the right by the first conveyor belt (3) on the left and transported to the first conveyor belt (3) in the middle. Then the first sealing door (6) is controlled to move downward and close. The air pressure in the middle chamber of the box (1) is adjusted to 400MPa to sterilize the food. S3. After the second stage of sterilization, the first electric push rod (17) is controlled to move the first sealing door (6) upward, so that the through hole (5) is opened. The food is transported to the right by the first conveyor belt (3) in the middle and then transported to the first conveyor belt (3) on the right side. Then the first sealing door (6) is controlled to move downward and close. The air pressure in the middle chamber of the box (1) is adjusted to 600MPa to sterilize the food.

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