Freshly squeezed tomato juice sealing device and sealing process

Abstract

The invention relates to the technical field of food processing, and discloses a freshly squeezed tomato juice sealing device and technology, the freshly squeezed tomato juice sealing device comprises a sealing barrel, the sealing barrel is internally provided with a stirring mechanism, the top of the sealing barrel is provided with a constant pressure mechanism and a one-way exhaust valve, the constant pressure mechanism comprises an induction piece, a synergistic piece, an adjusting piece, a reset piece and a gasification communicating pipe, and the one-way exhaust valve is arranged on the top of the sealing barrel. The induction part comprises an induction barrel fixedly connected to the top of the seal coat barrel, the bottom of the induction barrel is slidably connected with an induction head, the bottom of the induction head is arranged to be a hollow floating ball, and the top of the induction head is fixedly connected with a piston; a first-stage movable plug rod and a second-stage movable plug rod are arranged in the range extending pipe, and one end of the first-stage movable plug rod is connected into the induction cylinder in a sliding mode. According to the invention, the constant pressure in the sealing barrel is automatically maintained, and a carbon dioxide sealing layer is continuously and stably provided for the freshly squeezed tomato juice, so that oxidation and microorganism breeding are effectively delayed, and the fresh-keeping period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of food processing technology, and in particular to a sealing device and sealing process for freshly squeezed tomato juice. Background Technology

[0002] Freshly squeezed tomato juice, a beverage rich in nutrients such as vitamin C and lycopene, is widely used in the food processing industry. Key challenges in its production, storage, and transportation include addressing oxidation and microbial growth. Currently, the industry primarily uses carbon dioxide sealing technology for preserving freshly squeezed tomato juice. This device is mainly used in the final sealing stage of fresh-squeezed beverage production lines, the pre-treatment stage before cold chain storage in supermarkets, and short-term preservation scenarios in small fresh-squeezed juice shops. By forming a protective carbon dioxide layer on the surface of the freshly squeezed tomato juice, it isolates oxygen and inhibits microbial activity, thereby extending the product's shelf life and preserving its original flavor and nutrients.

[0003] Existing carbon dioxide sealing devices for freshly squeezed tomato juice typically include a sealing tank, a carbon dioxide supply component, a stirring component, and a basic pressure control component. The working process is roughly as follows: after freshly squeezed tomato juice is injected into the sealing tank, carbon dioxide gas is introduced into the tank through the carbon dioxide supply component. At the same time, the stirring component is activated to allow the carbon dioxide to initially mix with the juice and accumulate above the liquid surface to form a sealing layer. To maintain the stability of the sealing layer, some devices are equipped with a simple pressure valve. When the gas pressure in the tank is lower than the preset value, the valve is manually opened to replenish carbon dioxide. When the gas pressure is too high, the valve allows for natural venting.

[0004] However, when carbon dioxide leaks due to poor sealing or dissolves in the juice, causing a drop in pressure, the manual adjustment method cannot respond to changes in the pressure inside the container in real time, which can easily lead to a delay in replenishment, causing the seal to break, oxygen to enter, and accelerating the spoilage of the tomato juice.

[0005] Therefore, to address the aforementioned problems, a sealing device and sealing process for freshly squeezed tomato juice are proposed. Summary of the Invention

[0006] To overcome the above shortcomings, the present invention provides a sealing device and sealing process for freshly squeezed tomato juice, aiming to improve the problem that some existing devices have difficulty in adaptively and stably controlling the sealing gas pressure.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A sealing device for freshly squeezed tomato juice includes a sealing tank, an internal stirring mechanism, a constant pressure mechanism and a one-way exhaust valve on the top of the sealing tank, and the constant pressure mechanism includes a sensing element, an enhancing element, an adjusting element, a resetting element and a vaporization connecting pipe. The sensing element includes a sensing cylinder fixedly connected to the top of the sealing barrel, a sensing head slidably connected to the bottom of the sensing cylinder and the bottom of the sensing head is set as a hollow float, and a piston fixedly connected to the top of the sensing head. The enhancement component includes a range extender tube fixedly connected to the top of the induction tube. The range extender tube is provided with a primary movable plug rod and a secondary movable plug rod inside. One end of the primary movable plug rod is slidably connected to the inside of the induction tube. A sealing ring is provided inside the range extender tube, and the secondary movable plug rod is slidably connected to the inner side of the sealing ring. A wedge plug is fixedly connected to the end of the secondary movable plug rod away from the primary movable plug rod. The radius of the other end of the primary movable plug rod is larger than the radius of the wedge plug. As a further description of the above technical solution: The outer wall of the sealing barrel is fixedly connected to a pressure booster, which includes multiple oil delivery pipes fixedly connected to the bottom of the range extender. The outer wall of the sealing barrel is fixedly connected to a sealing box and a carbon dioxide storage tank. The inner wall of the sealing box is slidably connected to a pressure plate. The bottom of the pressure plate is fixedly connected to a transmission rod. The bottom of the transmission rod is fixedly connected to a drive disc, which is slidably connected to the inner wall of the carbon dioxide storage tank. A spring is connected between the top of the drive disc and the inner top of the carbon dioxide tank. As a further description of the above technical solution: The outer wall of the sealing barrel is fixedly connected to a reset component, which includes a fixing block fixedly connected to the outer wall of the sealing barrel, and an oil drum fixedly connected to the other side of the fixing block. A return channel is opened inside the fixing block and outside the oil drum. A lifting door is slidably connected to the inner wall of the sealing box. An elastic plate is provided at the bottom of the lifting door. A ramp is fixedly connected to the outer side of the lifting door. A starting column is slidably connected inside the fixing block. As a further description of the above technical solution: The top of the starting column passes through the range extender tube and abuts against the bottom of the wedge plug, while the bottom of the starting column abuts against the ramp plate. As a further description of the above technical solution: The oil drum is equipped with a booster pump. The output end of the booster pump is fixedly connected to an output pipe, and the other end of the output pipe is fixedly connected to the end of the range extender pipe. As a further description of the above technical solution: The input end of the vaporization connecting pipe is fixedly connected to the bottom of the carbon dioxide storage tank, and the other end is fixedly connected to the bottom of the sealing tank. A check valve is provided at the connection between the vaporization connecting pipe and the sealing tank. As a further description of the above technical solution: The stirring mechanism includes a motor located at the bottom of the sealing tank, a rotating shaft fixedly connected to the output end of the motor, multiple stirring paddles fixedly connected to the outside of the rotating shaft, and a vent plate fixedly connected to the inner wall of the sealing tank, with the bottom of the vent plate being a concave frustum shape to facilitate gas accumulation and passage. As a further description of the above technical solution: The one-way exhaust valve includes an exhaust pipe set at the top of the sealing barrel, an exhaust head set at the top of the exhaust pipe, and a one-way valve set at the bottom of the exhaust pipe. The one-way valve includes a fixing ring fixedly connected to the inside of the bottom opening of the exhaust pipe. A through groove is opened in the center of the fixing ring. Multiple columns are fixedly connected to the top of the fixing ring. A valve and an expansion block are slidably connected to the outside of the columns. The valve is located below the expansion block and its center protrudes towards the sealing barrel to block the through groove. The shape of the expansion block is adapted to the shape of the valve and multiple air holes are opened inside the expansion block. A sealing process for a fresh-squeezed tomato juice sealing device, applicable to any of the above-described fresh-squeezed tomato juice sealing devices, comprising the following steps: S1. Stirring and mixing and initial gas-liquid dispersion: After the device is started, the motor drives the rotating shaft to rotate the stirring paddle, stirring the freshly squeezed tomato juice to ensure uniform mixing. At the same time, carbon dioxide gas is introduced to fully mix the gas and liquid, form bubbles, and transport them to the top of the sealing tank, completing the homogenization of the juice and the initial dispersion of gas and liquid, creating conditions for subsequent carbon dioxide sealing. S2. Constant pressure mechanism triggering and carbon dioxide pressurization and delivery: When the air pressure at the top of the sealing barrel decreases, the sensor head drives the piston to move. After the action is amplified by the enhancement component, the hydraulic oil pushes the pressure plate to compress the spring of the drive disc. Liquid carbon dioxide is vaporized through the vaporization connecting pipe and input to the bottom of the barrel to replenish the air pressure in the barrel and increase the carbon dioxide ratio to the normal level for sealing fresh tomato juice. S3. System Reset and Carbon Dioxide Replenishment Cycle: As the gas pressure inside the tank recovers, the sensor head drives the piston back to its original position, the wedge plug blocks the oil supply pipe, the starting column drives the lifting door to open the return channel, the pressure plate resets, the spring drives the drive disc back to its original position, the carbon dioxide storage tank replenishes liquid carbon dioxide, the hydraulic oil returns to the oil tank through the return channel and circulates through the booster pump, and the constant pressure mechanism resets to maintain the subsequent constant pressure trigger cycle. S4. Overpressure venting and one-way backflow protection: When the pressure inside the tank is too high, the gas pushes the valve and expansion block of the one-way venting valve to release the overpressure gas. If external air attempts to enter, the expansion block will activate to block the valve and seal the passage, effectively preventing air from entering the sealing tank and damaging the carbon dioxide seal, thus ensuring the quality of the freshly squeezed tomato juice seal.

[0008] The present invention has the following beneficial effects: In this invention, a motor drives a rotating shaft and a stirring paddle to rotate, achieving uniform mixing of freshly squeezed tomato juice. This allows carbon dioxide to fully combine with the juice, forming bubbles that are then transported to the top layer, laying the foundation for a stable sealing layer. The sensor head and piston of the sensing element detect changes in air pressure, which, in conjunction with the primary and secondary movable stoppers and wedge-shaped stoppers of the enhancement element, amplifies the action, driving the pressure plate, transmission rod, and drive disc of the adjustment element. This achieves the vaporization and replenishment of liquid carbon dioxide. Simultaneously, the starting column, lifting door, return channel, and booster pump of the reset element complete the system circulation, automatically maintaining constant pressure inside the sealing tank. This continuously and stably provides carbon dioxide sealing for the freshly squeezed tomato juice, effectively delaying oxidation and microbial growth, and extending shelf life. The valve of the one-way exhaust valve and the expansion block release gas when the pressure inside the tank is too high, preventing backflow of external air and ensuring the purity of the carbon dioxide sealing layer, further improving the freshness and shelf life of the freshly squeezed tomato juice. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a sealing device and sealing process for freshly squeezed tomato juice proposed in this invention. Figure 2 This is a schematic diagram of the stirring mechanism of a fresh-squeezed tomato juice sealing device and sealing process proposed in this invention; Figure 3 This is a schematic diagram of the constant pressure mechanism of the sealing device and sealing process for freshly squeezed tomato juice proposed in this invention. Figure 4 This is a schematic diagram of the sensing element of a fresh-squeezed tomato juice sealing device and sealing process proposed in this invention; Figure 5 This is a schematic diagram of the structure of a sealing device for freshly squeezed tomato juice and an enhancement component for the sealing process proposed in this invention; Figure 6 This is a schematic diagram of the resetting component of a fresh-squeezed tomato juice sealing device and sealing process proposed in this invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the one-way exhaust valve of a fresh-squeezed tomato juice sealing device and sealing process proposed in this invention. Figure 9 This is a schematic diagram of the one-way valve of a sealing device and sealing process for freshly squeezed tomato juice proposed in this invention.

[0010] Legend: 1. Sealing tank; 2. Mixing mechanism; 201. Motor; 202. Rotating shaft; 203. Mixing paddle; 204. Vent plate; 3. Constant pressure mechanism; 31. Sensing element; 311. Sensing cylinder; 312. Sensing head; 313. Piston; 32. Enhancement element; 321. Range extender tube; 322. First-stage movable piston rod; 323. Second-stage movable piston rod; 324. Sealing ring; 325. Wedge plug; 33. Adjusting element; 331. Oil delivery pipe; 332. Sealing box; 333. Pressure plate; 334. Transmission rod; 335. Drive... 336. Moving plate; 337. Carbon dioxide storage tank; 34. Spring; 35. Reset component; 36. Fixing block; 37. Lifting door; 38. Elastic plate; 39. Return channel; 30. Approach plate; 30. Starting column; 31. Oil tank; 32. Booster pump; 33. Output pipe; 44. Vaporization connecting pipe; 5. One-way exhaust valve; 6. Exhaust pipe; 7. Exhaust head; 8. One-way valve; 9. Fixing ring; 10. Through groove; 11. Column; 12. Valve; 13. Expansion block. Detailed Implementation

[0011] 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.

[0012] Reference Figures 1 to 9 An embodiment of the present invention provides a fresh-squeezed tomato juice sealing device, comprising a sealing tank 1, which is used to hold fresh-squeezed tomato juice and provides a sealed space for the formation of carbon dioxide sealing, the operation of the stirring mechanism 2 and the operation of the constant pressure mechanism 3. The sealing tank 1 is equipped with a stirring mechanism 2 inside, and a constant pressure mechanism 3 and a one-way exhaust valve 4 are provided at the top of the sealing tank. The constant pressure mechanism 3 includes a sensing element 31, an enhancing element 32, an adjusting element 33, a resetting element 34 and a vaporization connecting pipe 35.

[0013] The stirring mechanism 2 includes a motor 201 located at the bottom of the sealing tank 1. The motor 201 provides power for the stirring action. The output end of the motor 201 is fixedly connected to a rotating shaft 202, which transmits the power output by the motor 201. Multiple stirring paddles 203 are fixedly connected to the outside of the rotating shaft 202. The stirring paddles 203 stir the freshly squeezed tomato juice in the sealing tank 1 by rotating, ensuring that the juice is mixed evenly. At the same time, it promotes the formation of bubbles from carbon dioxide and oxygen in the juice and pushes the bubbles to the top of the sealing tank 1, which helps to form a carbon dioxide seal. A vent plate 204 is fixedly connected to the inner wall of the sealing tank. The bottom of the vent plate 204 is a concave frustum shape that facilitates the accumulation and passage of gas. The vent plate 204 collects the gas entering from the bottom of the sealing tank 1, which facilitates the concentrated passage and even dispersion of gas into the freshly squeezed tomato juice, thereby improving the gas-liquid combination efficiency.

[0014] The sensing element 31 includes a sensing cylinder 311 fixedly connected to the top of the sealing barrel 1. The sensing cylinder 311 provides sliding installation space for the sensing head 312 and the piston 313. The sensing head 312 is slidably connected to the bottom of the sensing cylinder 311, and the bottom of the sensing head 312 is set as a hollow float. The sensing head 312 senses the air pressure change at the top of the sealing barrel 1. When the air pressure decreases, it can expand downward. The piston 313 is fixedly connected to the top of the sensing head 312. The piston 313 slides synchronously with the movement of the sensing head 312, which can form a negative pressure inside the sensing cylinder 311. At the same time, the air pressure change sensed by the sensing head 312 is converted into mechanical action and transmitted to the subsequent enhancement element 32.

[0015] The enhancement component 32 includes a range extender tube 321 fixedly connected to the top of the induction cylinder 311. The range extender tube 321 serves as the mounting carrier for the primary movable piston rod 322, the secondary movable piston rod 323, and the sealing ring 324. The primary movable piston rod 322 and the secondary movable piston rod 323 are housed inside the range extender tube 321. One end of the primary movable piston rod 322 is slidably connected inside the induction cylinder 311, receiving the motion transmitted by the piston 313 and transmitting it to the secondary movable piston rod 323. Simultaneously, leveraging its own radius characteristics, it works with the range extender tube 321 to initially amplify the motion amplitude. A sealing ring 324 is housed inside the range extender tube 321, and the secondary movable piston rod 323 is slidably connected to the sealing ring 324. Inside 24, the sealing ring 324 ensures the sealing of the inside of the range extender tube 321. The secondary movable piston rod 323 receives the action of the primary movable piston rod 322 and further amplifies the movement amplitude, driving the wedge plug 325 to move accordingly. The end of the secondary movable piston rod 323 away from the primary movable piston rod 322 is fixedly connected to the wedge plug 325. The wedge plug 325 can draw the liquid inside the output tube 349. When it moves backward, it can gradually leak out of the oil delivery tube 331. When it moves forward, it can block the oil delivery tube 331. At the same time, it can squeeze the starting column 346 to realize the control of the hydraulic oil passage and the starting column 346. The radius of the other end of the primary movable piston rod 322 is larger than the radius of the wedge plug 325.

[0016] A pressure boosting component is fixedly connected to the outer wall of the sealing barrel 1. The pressure boosting component includes multiple oil supply pipes 331 fixedly connected to the bottom of the range extender pipe 321. The oil supply pipes 331 deliver hydraulic oil from the range extender pipe 321 to the sealing box 332. The sealing box 332 and the carbon dioxide storage tank 336 are fixedly connected to the outer wall of the sealing barrel 1. The sealing box 332 provides a sliding sealed space for the pressure plate 333. The pressure plate 333 is slidably connected to the inner wall of the sealing box 332. The pressure plate 333 receives the pressure generated by the hydraulic oil delivered by the oil supply pipes 331 and converts the pressure into downward mechanical motion. A transmission rod 334 is fixedly connected to the bottom of the pressure plate 333, and the transmission rod 334 transmits the downward movement of the pressure plate 333. The pressure is applied to the drive disc 335. The bottom of the transmission rod 334 is fixedly connected to the drive disc 335, and the drive disc 335 is slidably connected to the inner wall of the carbon dioxide storage tank 336. The drive disc 335 slides on the inner wall of the carbon dioxide storage tank 336. When it moves downward, it can squeeze the liquid carbon dioxide in the tank, causing the liquid carbon dioxide to enter the vaporization connecting pipe 35. The carbon dioxide storage tank 336 is used to store liquid carbon dioxide. A spring 337 is connected between the top of the drive disc 335 and the inner top of the carbon dioxide tank. When the drive disc 335 moves downward, the spring 337 is stretched and stores elastic potential energy. When the pressure of the pressure plate 333 decreases, it can release the potential energy to drive the drive disc 335 to rise and reset.

[0017] A reset component 34 is fixedly connected to the outer wall of the sealing barrel 1. The reset component 34 includes a fixing block 341 fixedly connected to the outer wall of the sealing barrel 1. The fixing block 341 serves as the mounting carrier for the oil barrel 347 and the starting column 346. The oil barrel 347 is fixedly connected to the other side of the fixing block 341. The oil barrel 347 stores hydraulic oil, provides oil source for the booster pump 348, and receives hydraulic oil returning from the return channel 344. The booster pump 348 is installed inside the oil barrel 347. The booster pump 348 pressurizes the hydraulic oil in the oil barrel 347 and delivers it to the output pipe 349. The output end of the booster pump 348 is fixedly connected to the output pipe 349, and the other end of the output pipe 349 is fixedly connected to the end of the range extender pipe 321. The output pipe 349 delivers the hydraulic oil pressurized by the booster pump 348 to the range extender pipe 321. A return channel 344 is provided inside the fixed block 341 and outside the oil drum 347. The return channel 344 connects the sealed box 332 and the oil drum 347, allowing the hydraulic oil on the pressure plate 333 to flow back to the oil drum 347. A lifting door 342 is slidably connected to the inner wall of the sealed box 332. The lifting door 342 slides on the inner wall of the sealed box 332, controlling the opening and closing of the return channel 344. The return channel 344 is opened when descending and closed when ascending. An elastic plate 343 is provided at the bottom of the lifting door 342, which provides a return mechanism for the lifting door 342. Provides elastic support. The outer side of the lifting door 342 is fixedly connected to a ramp 345. The ramp 345 receives the action transmitted by the starting column 346, which drives the lifting door 342 to move up and down. The starting column 346 is slidably connected inside the fixed block 341. The starting column 346 slides in the fixed block 341. The top receives the squeezing action of the wedge plug 325, and the bottom transmits the action to the ramp 345 to control the opening and closing of the lifting door 342. The top of the starting column 346 passes through the range extender tube 321 and abuts against the bottom of the wedge plug 325. The bottom of the starting column 346 abuts against the ramp 345.

[0018] The input end of the vaporization connecting pipe 35 is fixedly connected to the bottom of the carbon dioxide storage tank 336, and the other end is fixedly connected to the bottom of the sealing barrel 1. The vaporization connecting pipe 35 is used to transport the liquid carbon dioxide in the carbon dioxide storage tank 336 to the bottom of the sealing barrel 1, and at the same time, the liquid carbon dioxide is vaporized in the pipe to form gas. A check valve is provided at the connection between the vaporization connecting pipe 35 and the sealing barrel 1. The check valve prevents the gas or freshly squeezed tomato juice in the sealing barrel 1 from flowing back into the vaporization connecting pipe 35.

[0019] The one-way exhaust valve 4 includes an exhaust pipe 41 located at the top of the sealing barrel 1, which provides a channel for gas discharge. An exhaust head 42 is located at the top of the exhaust pipe 41, which discharges the overpressure gas guided by the exhaust pipe 41 to the outside of the device. A one-way valve 43 is located at the bottom of the exhaust pipe 41, which controls the one-way flow of gas, allowing only the overpressure gas inside the sealing barrel 1 to be discharged, preventing external air from entering the sealing barrel 1. The one-way valve 43 includes a fixing ring 431 fixedly connected to the inside of the bottom opening of the exhaust pipe 41. The fixing ring 431 provides a mounting carrier for the columns 433 and the valve 434. A through groove 432 is opened in the center of the fixing ring 431, providing a channel for gas discharge. Multiple columns 433 are fixedly connected to the top of the fixing ring 431. The column 433 provides a sliding guide for the valve 434 and the expansion block 435. The valve 434 and the expansion block 435 are slidably connected to the outside of the column 433. The valve 434 is located below the expansion block 435 and its center protrudes towards the sealing barrel 1 to block the through groove 432. Under normal conditions, the through groove 432 is blocked to prevent external air from entering. When the pressure inside the sealing barrel 1 is too high, it is pushed away from the through groove 432 by the gas, allowing the gas to be discharged. The shape of the expansion block 435 is adapted to the valve 434, and multiple air holes are opened inside to assist the valve 434 in sealing. When external air flows in, the gas enters the block through the air holes, causing it to expand and squeeze the valve 434 to fit tightly against the fixing ring 431, enhancing the sealing effect. At the same time, it can assist the gas in pushing the valve 434 to open when venting.

[0020] A sealing process for a fresh-squeezed tomato juice sealing device, applicable to the aforementioned fresh-squeezed tomato juice sealing device, comprising the following steps: S1. Stirring and mixing and initial gas-liquid dispersion: After the device is started, the motor 201 drives the rotating shaft 202 to rotate the stirring paddle 203 to stir the freshly squeezed tomato juice to ensure uniform mixing. At the same time, carbon dioxide gas is introduced to fully mix the gas and liquid to form bubbles and deliver them to the top of the sealing tank 1, thus completing the homogenization of the juice and the initial gas-liquid dispersion, creating conditions for subsequent carbon dioxide sealing. S2. Constant pressure mechanism 3 triggering and carbon dioxide pressurization and delivery: When the air pressure at the top of the sealing tank 1 decreases, the sensing head 312 drives the piston 313 to move. After the action is amplified by the enhancement component 32, the hydraulic oil pushes the pressure plate 333 to compress the spring 337 of the drive plate 335. The liquid carbon dioxide is vaporized through the vaporization connecting pipe 35 and input to the bottom of the tank to replenish the air pressure in the tank and increase the carbon dioxide ratio to the normal level for sealing fresh tomato juice. S3. System Reset and Carbon Dioxide Replenishment Cycle: As the gas pressure inside the barrel recovers, the sensor head 312 drives the piston 313 to return to its original position, the wedge plug 325 blocks the oil supply pipe 331, the starting column 346 drives the lifting door 342 to open the return channel 344, the pressure plate 333 resets, the spring 337 drives the drive disc 335 to return to its original position, the carbon dioxide storage tank 336 replenishes liquid carbon dioxide, the hydraulic oil returns to the oil drum 347 through the return channel 344 and circulates through the booster pump 348, and the constant pressure mechanism 3 resets to maintain the subsequent constant pressure trigger cycle; S4. Overpressure venting and one-way backflow prevention protection: When the pressure inside the tank is too high, the gas pushes the valve 434 and expansion block 435 of the one-way venting valve 4 to release the overpressure gas. If external air attempts to enter, the expansion block 435 will activate to block the valve 434 and seal the channel 432, effectively preventing air from entering the sealing tank 1 and damaging the carbon dioxide seal, thus ensuring the quality of the freshly squeezed tomato juice seal.

[0021] Working principle: After the device is started, carbon dioxide gas is introduced into the sealing tank 1, and the motor 201 is turned on to output power, driving the rotating shaft 202 to rotate, which in turn causes multiple stirring paddles 203 to rotate synchronously, stirring the freshly squeezed tomato juice in the sealing tank 1 to ensure that the juice is mixed evenly. The carbon dioxide and oxygen inside the freshly squeezed tomato juice form bubbles and are transported to the top of the sealing tank 1 to form a carbon dioxide seal. When the air pressure at the top of the sealing tank 1 changes, the constant pressure mechanism 3 starts to work.

[0022] When the air pressure at the top of the sealing barrel 1 is low, i.e., the carbon dioxide content is low, the sensing head 312 in the sensing element 31 is a hollow float structure. When the air pressure at the top of the sealing barrel 1 is low, it expands downward and drives the piston 313 to slide downward, thereby creating a negative pressure inside the sensing cylinder 311, which in turn drives the first-stage movable piston rod 322 to move downward. Furthermore, due to the reduced cross-sectional diameter of the range extender 321, the movement amplitude of the first-stage movable stopper 322 increases by a certain multiple, and similarly drives the second-stage movable stopper 323 to move a greater multiple distance. This causes the liquid inside the output pipe 349 to be drawn through the wedge plug 325. As the wedge plug 325 moves backward, the three oil supply pipes 331 gradually leak out. The hydraulic oil enters the sealing box 332 through the oil supply pipes 331 and acts on the pressure plate 333, causing the pressure plate 333 to move downward under the action of gravity and impact force of the hydraulic oil. This drives the transmission rod 334 and the drive disc 335 to move downward and stretch the spring 337. The drive disc 335 presses down, causing the liquid carbon dioxide to be forced into the vaporization connecting pipe 35, where it vaporizes into gas and enters the bottom of the freshly squeezed tomato juice inside the sealing tank 1. After forming bubbles, the gas flows upstream and enters the top of the sealing tank 1 to replenish the air pressure. At the same time, the proportion of carbon dioxide in the air increases until it returns to the normal level required for the sealing of freshly squeezed tomato juice.

[0023] As the carbon dioxide ratio and gas pressure continue to recover, the increased gas pressure causes the induction head 312 and piston 313 to move upwards. This, in turn, through the synergistic effect of the first-stage movable piston rod 322 and the second-stage movable piston rod 323, drives the wedge plug 325 forward, blocking the oil supply pipe 331. Consequently, the pressure plate 333 gradually stops its downward movement. Furthermore, due to the pressure of the wedge plug 325 on the top of the starting column 346, the starting column 346 descends, causing the ramp plate 345 and the lifting door 342 to descend, thus opening the return channel 344. Hydraulic oil on pressure plate 333 enters return channel 344, and as the gravity on pressure plate 333 decreases, spring 337 recovers its deformation, driving transmission rod 334 and pressure plate 333 to continue rising and resetting. The internal pressure of carbon dioxide storage tank 336 decreases, thereby replenishing liquid carbon dioxide through external connection pipe. At the same time, the returned hydraulic oil is replenished into oil cylinder and input again to output pipe 349 via booster pump 348. Meanwhile, as the pressure in the sealing pipe stabilizes, wedge plug 325 returns to its initial position to facilitate subsequent constant pressure operation.

[0024] When the pressure inside the sealing tank 1 is too high, the one-way vent valve 4 starts to work. The gas pushes the valve 434 of the one-way valve 43 away from the groove 432 of the fixing ring 431. At the same time, the expansion block 435 assists in venting under the action of the gas. The gas is discharged through the vent pipe 41 and the vent head 42. When external air flows in, the expansion block 435 draws in the gas and expands downward to squeeze the valve 434 to stick tightly to the fixing ring 431, thereby blocking the groove 432 and preventing air from mixing into the carbon dioxide sealing layer, which would affect the quality of the freshly squeezed tomato juice.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for freshly squeezed tomato juice, comprising a sealing tank (1), characterized in that: The sealing tank (1) is equipped with a stirring mechanism (2) inside, and a constant pressure mechanism (3) and a one-way exhaust valve (4) are provided on the top of the sealing tank (1). The constant pressure mechanism (3) includes a sensing element (31), an enhancing element (32), an adjusting element (33), a resetting element (34), and a gasification connecting pipe (35). The sensing element (31) includes a sensing cylinder (311) fixedly connected to the top of the sealing barrel (1), a sensing head (312) slidably connected to the bottom of the sensing cylinder (311), and the bottom of the sensing head (312) is set as a hollow float. A piston (313) is fixedly connected to the top of the sensing head (312). The enhancement component (32) includes a range extender tube (321) fixedly connected to the top of the induction tube (311). The range extender tube (321) is provided with a primary movable stopper rod (322) and a secondary movable stopper rod (323). One end of the primary movable stopper rod (322) is slidably connected to the inside of the induction tube (311). A sealing ring (324) is provided inside the range extender tube (321), and the secondary movable stopper rod (323) is slidably connected to the inner side of the sealing ring (324). A wedge plug (325) is fixedly connected to the end of the secondary movable stopper rod (323) away from the primary movable stopper rod (322). The radius of the other end of the primary movable stopper rod (322) is larger than the radius of the wedge plug (325).

2. The fresh-pressed tomato juice sealing device according to claim 1, characterized in that: The outer wall of the sealing barrel (1) is fixedly connected to a pressurizing component, which includes multiple oil supply pipes (331) fixedly connected to the bottom of the range extender pipe (321). The outer wall of the sealing barrel (1) is fixedly connected to a sealing box (332) and a carbon dioxide storage tank (336). The inner wall of the sealing box (332) is slidably connected to a pressure plate (333). The bottom of the pressure plate (333) is fixedly connected to a transmission rod (334). The bottom of the transmission rod (334) is fixedly connected to a drive disc (335), and the drive disc (335) is slidably connected to the inner wall of the carbon dioxide storage tank (336). A spring (337) is connected between the top of the drive disc (335) and the inner top of the carbon dioxide.

3. The fresh-pressed tomato juice sealing device according to claim 1, characterized in that: The outer wall of the sealing barrel (1) is fixedly connected to a reset component (34). The reset component (34) includes a fixing block (341) fixedly connected to the outer wall of the sealing barrel (1), and an oil drum (347) is fixedly connected to the other side of the fixing block (341). A return channel (344) is opened between the inside of the fixing block (341) and the outside of the oil drum (347). A lifting door (342) is slidably connected to the inner wall of the sealing box (332). An elastic plate (343) is provided at the bottom of the lifting door (342). A ramp (345) is fixedly connected to the outside of the lifting door (342). A starting column (346) is slidably connected to the inside of the fixing block (341).

4. The fresh-pressed tomato juice sealing device according to claim 3, characterized in that: The top of the starting column (346) passes through the range extender tube (321) and abuts against the bottom of the wedge plug (325), while the bottom of the starting column (346) abuts against the ramp (345).

5. The fresh-pressed tomato juice sealing device according to claim 3, characterized in that: The oil drum (347) is equipped with a booster pump (348), the output end of which is fixedly connected to an output pipe (349), and the other end of the output pipe (349) is fixedly connected to the end of the range extender pipe (321).

6. The fresh-pressed tomato juice sealing device according to claim 2, characterized in that: The input end of the vaporization connecting pipe (35) is fixedly connected to the bottom of the carbon dioxide storage tank (336), and the other end is fixedly connected to the bottom of the sealing barrel (1). A check valve is provided at the connection between the vaporization connecting pipe (35) and the sealing barrel.

7. The fresh-pressed tomato juice sealing device according to claim 1, characterized in that: The stirring mechanism (2) includes a motor (201) located at the bottom of the sealing barrel (1). The output end of the motor (201) is fixedly connected to a rotating shaft (202). Multiple stirring paddles (203) are fixedly connected to the outside of the rotating shaft (202). A venting plate (204) is fixedly connected to the inner wall of the sealing barrel, and the bottom of the venting plate (204) is a concave frustum shape that facilitates the accumulation and passage of gas.

8. The fresh-pressed tomato juice sealing device according to claim 1, characterized in that: The one-way exhaust valve (4) includes an exhaust pipe (41) set on the top of the sealing barrel (1), an exhaust head (42) is set on the top of the exhaust pipe (41), and a one-way valve (43) is set on the bottom of the exhaust pipe (41). The one-way valve (43) includes a fixing ring (431) fixedly connected to the inner side of the bottom opening of the exhaust pipe (41). A through groove (432) is opened in the center of the fixing ring (431). Multiple columns (433) are fixedly connected to the top of the fixing ring (431). A valve (434) and an expansion block (435) are slidably connected to the outside of the column (433). The valve (434) is located below the expansion block (435) and its center protrudes towards the sealing barrel (1) to block the through groove (432). The shape of the expansion block (435) is adapted to the shape of the valve (434), and multiple air holes are opened inside the expansion block (435).

9. A sealing process for a fresh-squeezed tomato juice sealing device, applicable to the fresh-squeezed tomato juice sealing device according to any one of claims 1-8, comprising the following steps: S1. Stirring and mixing and initial gas-liquid dispersion: After the device is started, the motor (201) drives the rotating shaft (202) to rotate the stirring paddle (203) to stir the freshly squeezed tomato juice to ensure uniform mixing. At the same time, carbon dioxide gas is introduced to fully mix the gas and liquid to form bubbles and transport them to the top of the sealing barrel (1), thus completing the homogenization of the juice and the initial dispersion of gas and liquid, creating conditions for subsequent carbon dioxide sealing. S2. Constant pressure mechanism (3) triggering and carbon dioxide pressurization and delivery: When the air pressure at the top of the sealing barrel (1) decreases, the sensing head (312) drives the piston (313) to move. After the action is amplified by the enhancement component (32), the hydraulic oil pushes the pressure plate (333) to compress the spring (337) of the drive plate (335). The liquid carbon dioxide is vaporized through the vaporization connecting pipe (35) and input into the bottom of the barrel to replenish the air pressure in the barrel and raise the carbon dioxide ratio to the normal level of freshly squeezed tomato juice sealing. S3. System Reset and Carbon Dioxide Replenishment Cycle: As the gas pressure inside the barrel recovers, the sensor head (312) drives the piston (313) to return to its original position, the wedge plug (325) blocks the oil supply pipe (331), the starting column (346) drives the lifting door (342) to open the return channel (344), the pressure plate (333) resets, the spring (337) drives the drive disc (335) to return to its original position, the carbon dioxide storage tank (336) replenishes liquid carbon dioxide, the hydraulic oil returns to the oil barrel (347) through the return channel (344) and circulates through the booster pump (348), the constant pressure mechanism (3) resets to maintain the subsequent constant pressure trigger cycle; S4. Overpressure venting and one-way backflow protection: When the pressure inside the barrel is too high, the gas pushes the valve (434) and expansion block (435) of the one-way venting valve (4) to release the overpressure gas. If external air tries to enter, the expansion block (435) will activate to block the valve (434) and seal the channel (432), effectively preventing air from mixing into the sealing barrel (1) and damaging the carbon dioxide seal, thus ensuring the quality of the freshly squeezed tomato juice seal.

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