Packaging and transporting device for antioxidant edible oil

Abstract

The application discloses an antioxidative edible oil packaging and transporting device, and relates to the technical field of edible oil packaging. The device comprises a packaging tank, which is divided into an air compression area and an oil storage area by a piston disc, wherein the oil storage area is used for storing edible oil; and a nitrogen charging assembly, which is arranged on the top of the packaging tank and used for injecting nitrogen into the air compression area of the packaging tank to push the piston disc to move and compress in the oil storage area. The piston disc is movably arranged in the packaging tank, so that the interior of the packaging tank is divided into the air compression area and the oil storage area. The nitrogen charging assembly is communicated with the interior of the packaging tank, so that the nitrogen in the nitrogen charging assembly can be delivered to the air compression area of the packaging tank, the air compression area is filled with nitrogen, the piston disc is pushed to move to the oil storage area, the space of the oil storage area is reduced, the oil is squeezed to rise, the air above the oil is discharged, a sealing seat is arranged on the top of the packaging tank and is provided with an exhaust hole, and the air can be discharged through the exhaust hole while the oil rises.

Description

Technical Field

[0001] This invention relates to the field of edible oil packaging technology, specifically to an anti-oxidation edible oil packaging and transportation device. Background Technology

[0002] Edible oil is a basic cooking ingredient used in food preparation. It is liquid at room temperature and is generally made by pressing and refining raw materials such as peanuts, olives, sunflower seeds, and soybeans.

[0003] In the prior art, such as the "An Oil Storage Device for Easy Transportation in Edible Oil Production" with publication number CN112660225A, a set of movable cylinder walls is slidably connected inside the transport vehicle; a set of drive handwheels is rotatably connected to the top right side of the transport vehicle; a set of scraper frames are snapped onto the front and rear sides of the transport vehicle; and a set of multi-functional drawers is slidably connected to the rear bottom of the transport vehicle. By allowing the oil outlet to slide within the oil trough to change different heights, it is not necessary to tip the transport vehicle over to pour out the edible oil, thus saving time and effort; by installing a heating wire at the bottom of the transport vehicle, the time for secondary heating of the edible oil is saved, and energy is also conserved.

[0004] After refining and processing, edible oils need to be transported. Before transportation, they must be packaged in cans. In practice, after packaging, a significant amount of air remains in the headspace inside the can. Oxygen in the air is easily soluble in oil, causing oxidation. Existing technology addresses this problem by filling the can with nitrogen to replace the air. However, in practice, air in the dead corners of the can is difficult to completely expel, resulting in incomplete air replacement. Furthermore, it is necessary to wait for the nitrogen filling to complete before sealing, during which time outside air can easily seep in again. When residual oxygen enters the can, it reacts with the unsaturated fatty acids in the edible oil, producing harmful substances such as aldehydes and ketones. This causes the edible oil to taste astringent, lose its greasiness, and completely lose its flavor. Moreover, the peroxides and aldehydes produced during oxidation are toxic. Long-term consumption of oxidized and deteriorated edible oil can cause digestive system and liver damage, as well as increase gastrointestinal discomfort. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-oxidation edible oil packaging and transportation device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an anti-oxidation edible oil packaging and transportation device, comprising: The packaging can is divided into an air compression zone and an oil filling zone by a piston disc, with the oil filling zone used to store edible oil. The nitrogen filling assembly, located at the top of the packaging tank, is used to inject nitrogen into the air compression zone inside the packaging tank, pushing the piston disc to move towards the oil filling zone for compression. A float sealing assembly, installed at the top of the oil filling area of ​​a packaging tank, includes a sealing seat, a sealing disc, and a float body. During the oil's ascent, the float body pushes the sealing disc upwards. The sealing seat has several evenly spaced vent holes to expel air. A sealing groove is formed at the bottom of the sealing seat. A sealing ring is fixedly installed at the top of the sealing disc, used to embed the sealing ring into the sealing groove for sealing after air is expelled. Several upper connecting teeth are evenly distributed circumferentially at the bottom of the sealing seat, and several lower connecting teeth are evenly distributed circumferentially at the top of the sealing disc. Both the bottom and top of the upper and lower connecting teeth have inclined surfaces. Hanging components are provided on one side of the upper connecting teeth and the other side of the lower connecting teeth. During the upward movement driven by buoyancy, the inclined surfaces contact and misalign, causing the hanging components to connect and lock securely.

[0007] Preferably, the bottom of the lower connecting tooth is provided with a ring body, and a plurality of spring members are evenly distributed along the circumferential direction between the ring body and the sealing seat. The spring members are provided with spring pieces on both sides symmetrically, and the ring body is located above the sealing disc.

[0008] Preferably, a guide rod is fixedly connected to the top of the sealing disc, and the guide rod movably passes through the center of the sealing seat.

[0009] Preferably, the top of the sealing disc is provided with a sealing gasket, the sealing gasket is located inside the sealing ring, and the sealing gasket is located below the vent hole.

[0010] Preferably, the nitrogen filling assembly includes a first nitrogen tank and a second nitrogen tank, which are symmetrically installed on the top of the packaging tank. One end of the first nitrogen tank and the second nitrogen tank are fixedly connected to a nitrogen filling port. One end of the first nitrogen tank is fixedly connected to a first pipe fitting, which is provided with a filling valve. One end of the first pipe fitting is fixedly connected to one side of the packaging tank.

[0011] Preferably, a second fitting is fixedly connected to one end of the second nitrogen tank, and one end of the second fitting is fixedly connected to the other side of the packaging tank. A third fitting is fixedly connected between the first nitrogen tank and the second nitrogen tank.

[0012] Preferably, the packaging can includes a can body, the piston disc is disposed inside the can body, the outer wall of the piston disc is provided with a plurality of guide grooves, the outer wall of the piston disc is provided with a sealing ring, and the inner wall of the can body is provided with a plurality of guide strips, the guide strips being movably embedded in the inner side of the guide grooves.

[0013] Preferably, a guide rod is fixedly connected to one side of the piston disc, and one end of the guide rod movably passes through one end of the tank body.

[0014] Preferably, the tank has sealing end caps at both ends, and a guide rod is movably inserted through the center of one of the sealing end caps. One end of the tank is fixedly connected to a one-way exhaust valve, the top of the other end of the tank is fixedly connected to an oil inlet, and the bottom of the other end of the tank is fixedly connected to an oil outlet.

[0015] Preferably, a pressure gauge is provided on the tank, and a controller is fixedly installed at one end of the tank.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Existing technologies primarily replace air by filling the tank with nitrogen. However, in practice, air in the dead corners of the tank is difficult to completely expel, resulting in incomplete air replacement. Furthermore, sealing requires waiting for nitrogen filling to complete, during which time outside air can easily re-infiltrate. This technology, by installing a piston disc inside the packaging tank, divides the tank's interior into an air compression zone and an oil filling zone. A nitrogen filling assembly connects to the tank's interior, allowing nitrogen to be delivered to the air compression zone. This fills the air compression zone with nitrogen, pushing the piston disc towards the oil filling zone, reducing the space and causing the oil to rise and expelling the air above it. A sealing seat is installed at the top of the packaging tank and includes an exhaust port, facilitating air expulsion as the oil rises. A guide rod is movably inserted through the center of the sealing seat, and a float is installed at the bottom via the sealing disc. As the oil level rises, the float body pushes the sealing disc and guide rod upwards synchronously. Upon reaching the end, the sealing disc abuts against the bottom of the sealing seat, and the sealing ring is embedded into the sealing groove for sealing. Upper connecting teeth are evenly distributed circumferentially at the bottom of the sealing seat, while correspondingly, several lower connecting teeth are distributed on the top of the sealing disc. When the float body lifts the sealing disc to the end position, the inclined structures of the upper and lower connecting teeth contact each other. Continued upward movement due to the rising liquid level causes the lower connecting teeth to rotate out of alignment, engaging the connecting components between the upper and lower connecting teeth to achieve a locking effect. In practical operation, this technology significantly reduces the oxygen content in the dead corners inside the packaging can, lowering the oxidation reaction of the edible oil. It also seals the oil while venting air, maintaining a seal even when the oil sloshes during transportation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure in this invention; Figure 2 This is a three-dimensional structural diagram from another angle in the present invention; Figure 3 This is a schematic diagram of the internal cross-sectional structure in this invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a schematic diagram of another part of the structure in this invention; Figure 7 This is a partial structural diagram of the present invention; Figure 8 This is a schematic diagram of a partially exploded structure in this invention; Figure 9 For the present invention Figure 8 A magnified structural diagram at point B in the diagram.

[0018] In the diagram: 100, Packaging can; 101, Can body; 102, Sealing end cap; 103, Oil inlet; 104, Oil outlet; 105, Piston disc; 106, Guide groove; 107, Sealing ring; 108, Guide strip; 109, Guide rod; 110, Pressure gauge; 111, Controller; 112, One-way exhaust valve; 200, Nitrogen filling assembly; 201, First nitrogen tank; 202, Second nitrogen tank; 203, Nitrogen filling port; 20 4. First fitting; 205. Inflation valve; 206. Second fitting; 207. Third fitting; 300. Float sealing assembly; 301. Sealing seat; 302. Vent hole; 303. Sealing groove; 304. Guide rod; 305. Sealing disc; 306. Sealing ring; 307. Sealing gasket; 308. Float body; 309. Upper connecting tooth; 310. Lower connecting tooth; 311. Ring body; 312. Spring component; 313. Spring piece. Detailed Implementation

[0019] 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.

[0020] To address the issues of incomplete air removal from dead corners inside existing containers, leading to incomplete air replacement, and the need to wait for nitrogen filling before sealing, which allows outside air to re-enter, an anti-oxidation edible oil packaging and transportation device is proposed. For details, refer to... Figure 1 , Figure 2 and Figures 5-9 As shown: It includes: a packaging tank 100, which is divided into an air compression zone and an oil filling zone by a piston disc 105, wherein the oil filling zone is used to store edible oil; Nitrogen filling assembly 200, which is located at the top of packaging tank 100, is used to inject nitrogen into the air compression zone inside packaging tank 100 and push piston disc 105 to move towards the oil filling zone for compression; The float sealing assembly 300 is installed on the top of the oil filling area of ​​the packaging tank 100. It includes a sealing seat 301, a sealing disc 305, and a float body 308. During the rise of the oil, the float body 308 pushes the sealing disc 305 to rise. Several vent holes 302 are evenly distributed through the sealing seat 301 to discharge air. A sealing groove 303 is provided at the bottom of the sealing seat 301. A sealing ring 306 is fixedly installed on the top of the sealing disc 305. After the air is discharged, the sealing ring 306 is embedded into the sealing groove 303 for sealing. Several upper connecting teeth 309 are evenly distributed along the circumference at the bottom of the sealing seat 301. Several lower connecting teeth 310 are evenly distributed along the circumference at the top of the sealing disc 305. The bottom of the upper connecting teeth 309 and the top of the lower connecting teeth 310 are both provided with inclined structures. Hanging components are provided on one side of the upper connecting teeth 309 and the other side of the lower connecting teeth 310. During the upward movement driven by buoyancy, the inclined surfaces contact and misalignment causes the hanging components to connect and lock.

[0021] Specifically, the piston disc 105 is movably installed inside the packaging tank 100, dividing the interior of the packaging tank 100 into an air compression zone and an oil filling zone. The nitrogen filling assembly 200 is connected to the interior of the packaging tank 100, allowing nitrogen gas inside the nitrogen filling assembly 200 to be delivered to the air compression zone inside the packaging tank 100. This fills the air compression zone with nitrogen gas, pushing the piston disc 105 to move towards the oil filling zone, reducing the space in the oil filling zone, squeezing the oil to rise, and expelling the air above the oil.

[0022] A sealing seat 301 is installed on the top of the packaging can 100 and has a vent 302, which facilitates the expulsion of air through the vent 302 as the oil level rises. A guide rod 304 is movably inserted through the center of the sealing seat 301, and a float body 308 is installed at the bottom via a sealing disc 305. As the oil level rises, it pushes the sealing disc 305 and the guide rod 304 to rise synchronously. When the oil reaches its end, the sealing disc 305 abuts against the bottom of the sealing seat 301, and a sealing ring 306 is embedded in the sealing groove 303 to seal the surface, thereby reducing the oxygen content in the dead corners inside the packaging can 100 and reducing the oxidation reaction of the edible oil. The float body 308 is made of lightweight food-grade plastic and has anti-corrosion properties.

[0023] The upper connecting teeth 309 are evenly distributed along the circumference at the bottom of the sealing seat 301, and correspondingly, several lower connecting teeth 310 are distributed on the top of the sealing disc 305. When the float body 308 lifts the sealing disc 305 to the end position, the inclined structure of the upper connecting teeth 309 and the lower connecting teeth 310 comes into contact. As the liquid level rises and continues to push, the lower connecting teeth 310 rotate in a misaligned manner, so that the hook assembly between the upper connecting teeth 309 and the lower connecting teeth 310 is engaged, thereby completing the locking effect. This is beneficial for sealing while venting air, and can also maintain the sealing effect when the oil shakes during transportation.

[0024] In a further preferred embodiment, the bottom of the lower connecting tooth 310 is provided with a ring body 311, and a plurality of spring elements 312 are evenly distributed along the circumferential direction between the ring body 311 and the sealing seat 301. Spring pieces 313 are symmetrically provided on both sides of the spring elements 312. The ring body 311 is located above the sealing disc 305. A guide rod 304 is fixedly connected to the top of the sealing disc 305. The guide rod 304 movably passes through the center of the sealing seat 301. A sealing washer 307 is provided on the top of the sealing disc 305. The sealing washer 307 is located inside the sealing ring 306 and below the vent hole 302.

[0025] Specifically, springs 312 and spring plates 313 are distributed at the bottom of the sealing seat 301 and connected to the ring body 311. This facilitates the slight compression of springs 312 during the lifting of the sealing disc 305. After the upper connecting tooth 309 and the lower connecting tooth 310 are locked together, the ring body 311 provides further locking by pressing down, improving the stability of the locking. The guide rod 304, which moves through the center of the sealing seat 301, provides guidance. A sealing gasket 307 is provided on the sealing disc 305, allowing it to abut against the bottom of the vent hole 302 for further sealing when the sealing disc is lifted to the final sealing position.

[0026] Preferred, according to Figure 1 As shown, the nitrogen filling assembly 200 includes a first nitrogen tank 201 and a second nitrogen tank 202. The first nitrogen tank 201 and the second nitrogen tank 202 are symmetrically installed on the top of the packaging tank 100. One end of the first nitrogen tank 201 and the second nitrogen tank 202 is fixedly connected to a nitrogen filling port 203. One end of the first nitrogen tank 201 is fixedly connected to a first fitting 204. The first fitting 204 is provided with a filling valve 205. One end of the first fitting 204 is fixedly connected to one side of the packaging tank 100. One end of the second nitrogen tank 202 is fixedly connected to a second fitting 206. One end of the second fitting 206 is fixedly connected to the other side of the packaging tank 100. A third fitting 207 is fixedly connected between the first nitrogen tank 201 and the second nitrogen tank 202.

[0027] Specifically, both the first nitrogen tank 201 and the second nitrogen tank 202 store nitrogen gas. The nitrogen filling port 203 facilitates the addition of nitrogen gas into both tanks. A first fitting 204 is connected to one end of the first nitrogen tank 201 and is equipped with a filling valve 205, allowing nitrogen gas to be added into the tank 101 by opening the valve. During nitrogen addition, the gas pressure pushes the piston disc 105 towards the oil filling area, reducing the size of the oil filling area and raising the oil level, thus reducing dead zone air residue. A second fitting 206 is fixedly connected to the other side of the packaging tank 100, facilitating the discharge of nitrogen gas after operation and its recycling into the second nitrogen tank 202, improving energy efficiency. The first nitrogen tank 201 and the second nitrogen tank 202 are connected by a third fitting 207, which is also equipped with a solenoid valve to replenish nitrogen in the first nitrogen tank 201 when it is low, providing a backup function.

[0028] Preferred, according to Figures 1-4 As shown, the packaging can 100 includes a can body 101, a piston disc 105 disposed inside the can body 101, a plurality of guide grooves 106 formed on the outer wall of the piston disc 105, a sealing ring 107 provided on the outer wall of the piston disc 105, a plurality of guide strips 108 distributed on the inner wall of the can body 101, the guide strips 108 being movably embedded in the inner side of the guide grooves 106, a guide rod 109 fixedly connected to one side of the piston disc 105, one end of the guide rod 109 movably passing through one end of the can body 101, sealing end caps 102 provided at both ends of the can body 101, and the guide rod 109 movably passing through the center of one of the sealing end caps 102, a one-way exhaust valve 112 fixedly connected to one end of the can body 101, an oil inlet 103 fixedly connected to the top of the other end of the can body 101, an oil outlet 104 fixedly connected to the bottom of the other end of the can body 101, a pressure gauge 110 provided on the can body 101, and a controller 111 fixedly installed at one end of the can body 101.

[0029] Specifically, the tank 101, as the core load-bearing component of the entire device, provides a sealed, stable, and safe storage space for edible oil, effectively isolating it from external dust, impurities, and air intrusion, preventing the edible oil from oxidizing and deteriorating, ensuring the storage quality and shelf life of the edible oil, and laying the foundation for subsequent storage, transportation, and other operations of the edible oil.

[0030] The guide groove 106 is precisely cut into the outer wall of the piston disc 105, and its size matches the guide strip 108 on the inner wall of the tank 101. The two form a tight and smooth sliding connection. At the same time, a guide rod 109 is fixedly installed on the side of the piston disc 105. The guide rod 109 horizontally passes through one end of the tank 101 and is sealed and slidably engaged with the penetration point of the tank 101. These two guide structures cooperate and work together to provide stable and reliable guidance support for the movement of the piston disc 105. This effectively limits the piston disc 105 from deflection, tilting or jamming during movement, and maximizes the stability and smoothness of the piston disc 105 when reciprocating inside the tank 101, ensuring the normal operation of related tasks. The sealing ring 107 is made of high-quality oil-resistant and corrosion-resistant sealing material and is tightly fitted into the groove on the outer wall of the piston disc 105. Its outer wall is tightly fitted with the inner wall of the tank 101, which can effectively fill the gap between the piston disc 105 and the inner wall of the tank 101, so as to provide a good sealing effect, prevent the edible oil inside the tank 101 from leaking, and at the same time prevent outside air from entering the tank and affecting the quality of the edible oil. This significantly improves the sealing performance of the entire device and ensures the sealing and practicality of the device. The sealing end caps 102 are fixedly installed at both ends of the tank body 101, and are connected to the tank body 101 by bolts or snaps to achieve a sealing fit. This can provide a comprehensive sealing effect at both ends of the tank body 101, further isolating the external environment from the inside of the tank. At the same time, the connection method of the sealing end caps 102 is reasonably designed, which makes it easy for operators to open and close quickly. When it is necessary to clean, inspect, maintain or replace parts inside the tank body 101, opening the sealing end caps 102 can facilitate the relevant operations inside, greatly improving the convenience of equipment maintenance and operation. The one-way exhaust valve 112 is installed in the air compression zone of the tank 101. It has a one-way conduction structure inside, which can accurately sense the pressure change in the air compression zone of the tank 101. When the pressure in the air compression zone exceeds the preset safety value and pressure overload occurs, the one-way exhaust valve 112 will automatically open to discharge excess air inside the tank in time, realize the function of exhaust and pressure relief, effectively avoid damage to the tank 101 due to excessive pressure, ensure the safe operation of the device, and at the same time maintain the stability of the internal pressure of the tank, providing good conditions for the normal movement of the piston disc 105. The oil inlet 103 is deliberately located at the top of the tank 101 and close to the oil filling area inside the tank. This layout design conforms to the operating habits of adding edible oil. When adding edible oil, the operator does not need to frequently move the equipment or adjust the operating posture. The operator can conveniently and quickly inject the edible oil into the tank through the oil inlet 103, which effectively improves the efficiency of adding edible oil. The oil outlet 104 is located at a suitable position in the tank 101 and is connected to the internal oil filling area. This allows the operator to quickly and smoothly discharge the oil stored in the tank according to the usage needs, meeting the subsequent use or transportation needs of edible oil.A high-precision pressure sensor is fixedly connected to the bottom of the pressure gauge 110. This pressure sensor is inserted deep into the tank 101 and can sense and collect the internal pressure of the tank in real time and accurately. The sensed pressure signal is converted into an electrical signal and transmitted to the pressure gauge 110. The pressure gauge 110 then clearly displays the internal pressure value of the tank through pointers or numbers on the dial, allowing operators to intuitively and promptly understand the internal pressure of the tank, detect pressure anomalies in a timely manner, and take corresponding measures to ensure the safe and stable operation of the device. The controller 111, as the control core of the entire device, integrates operation buttons, a signal receiving module, and a command output module. Operators can conveniently control various functions of the device through the relevant buttons on the controller 111, such as controlling the movement of the piston disc 105, monitoring pressure data, and controlling the opening and closing of the exhaust valve, without the need for complex manual operations. This significantly reduces the difficulty of operation, improves the convenience and intelligence of the entire device operation, and increases operational efficiency.

[0031] In this invention, the tank 101 provides storage space for edible oil. The oil inlet 103 is located at the top of the tank 101 near the filling area for easy addition of edible oil, and the oil outlet 104 facilitates the discharge of internal oil. Both the first nitrogen tank 201 and the second nitrogen tank 202 store nitrogen gas, and the nitrogen filling port 203 facilitates the addition of nitrogen gas into both tanks. A first pipe 204 is connected to one end of the first nitrogen tank 201 and is equipped with a filling valve 205, allowing for easy opening of the valve to add nitrogen gas into the tank 101. During nitrogen addition, the gas pressure pushes the piston disc 105 towards the filling area, reducing the size of the filling area, raising the oil level, and minimizing residual air in dead zones. The sealing seat 301 is installed on the top of the packaging can 100 and has an exhaust hole 302, which helps to expel air through the exhaust hole 302 as the oil rises. The guide rod 304 is movably inserted through the center of the sealing seat 301, and the float body 308 is installed at the bottom through the sealing plate 305. As the oil level rises, it pushes the sealing plate 305 and the guide rod 304 to rise synchronously. When it reaches the end, the sealing plate 305 abuts against the bottom of the sealing seat 301, and the sealing ring 306 is embedded in the sealing groove 303 to seal, thereby reducing the oxygen content in the dead corners inside the packaging can 100 and reducing the oxidation reaction of edible oil. The upper connecting teeth 309 are evenly distributed along the circumference at the bottom of the sealing seat 301, and correspondingly, several lower connecting teeth 310 are distributed on the top of the sealing disc 305. When the float body 308 lifts the sealing disc 305 to the end position, the inclined structure of the upper connecting teeth 309 and the lower connecting teeth 310 comes into contact. As the liquid level rises and continues to push, the lower connecting teeth 310 are displaced and rotated, so that the hooking components between the upper connecting teeth 309 and the lower connecting teeth 310 are engaged, thereby completing the locking effect.

[0032] The air pressure sensor and controller in this invention are common knowledge in the field, and their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring layout of the air pressure sensor and controller will not be explained in detail.

[0033] 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. An anti-oxidation edible oil packaging and transportation device, characterized in that, include: The packaging can (100) is divided into an air compression zone and an oil filling zone by a piston disc (105), wherein the oil filling zone is used to store edible oil; A nitrogen filling assembly (200), located at the top of the packaging tank (100), is used to inject nitrogen into the air compression zone inside the packaging tank (100) to push the piston disc (105) to move towards the oil filling zone for compression; A float sealing assembly (300) is installed on the top of the oil filling area of ​​the packaging tank (100), including a sealing seat (301), a sealing disc (305), and a float body (308). During the rise of the oil, the float body (308) pushes the sealing disc (305) to rise. Several vent holes (302) are evenly provided through the sealing seat (301) to discharge air. A sealing groove (303) is provided at the bottom of the sealing seat (301). A sealing ring (306) is fixedly installed on the top of the sealing disc (305) to seal the sealing disc (306) after the air is discharged. 06) Embedded into the sealing groove (303) for sealing. The bottom of the sealing seat (301) is evenly distributed with several upper connecting teeth (309) along the circumferential direction. The top of the sealing disc (305) is evenly distributed with several lower connecting teeth (310) along the circumferential direction. The bottom of the upper connecting teeth (309) and the top of the lower connecting teeth (310) are both provided with inclined structures. One side of the upper connecting teeth (309) and the other side of the lower connecting teeth (310) are both provided with hooking components. During the upward movement driven by buoyancy, the inclined surfaces contact and misalignment occurs, causing the hooking components to connect and lock.

2. The anti-oxidation edible oil packaging and transportation device according to claim 1, characterized in that: The bottom of the lower connecting tooth (310) is provided with a ring body (311), and a number of spring pieces (312) are evenly distributed along the circumferential direction between the ring body (311) and the sealing seat (301). Spring pieces (313) are symmetrically provided on both sides of the spring pieces (312), and the ring body (311) is located above the sealing disc (305).

3. The anti-oxidation edible oil packaging and transportation device according to claim 2, characterized in that: A guide rod (304) is fixedly connected to the top of the sealing disc (305), and the guide rod (304) moves through the center of the sealing seat (301).

4. The anti-oxidation edible oil packaging and transportation device according to claim 1, characterized in that: The top of the sealing disc (305) is provided with a sealing gasket (307), which is located inside the sealing ring (306) and below the vent hole (302).

5. The anti-oxidation edible oil packaging and transportation device according to claim 1, characterized in that: The nitrogen filling assembly (200) includes a first nitrogen tank (201) and a second nitrogen tank (202). The first nitrogen tank (201) and the second nitrogen tank (202) are symmetrically installed on the top of the packaging tank (100). A nitrogen filling port (203) is fixedly connected to one end of the first nitrogen tank (201) and the second nitrogen tank (202). A first pipe fitting (204) is fixedly connected to one end of the first nitrogen tank (201). An inflation valve (205) is provided on the first pipe fitting (204). One end of the first pipe fitting (204) is fixedly connected to one side of the packaging tank (100).

6. The anti-oxidation edible oil packaging and transportation device according to claim 5, characterized in that: A second fitting (206) is fixedly connected to one end of the second nitrogen tank (202), and one end of the second fitting (206) is fixedly connected to the other side of the packaging tank (100). A third fitting (207) is fixedly connected between the first nitrogen tank (201) and the second nitrogen tank (202).

7. The anti-oxidation edible oil packaging and transportation device according to claim 1, characterized in that: The packaging can (100) includes a can body (101), a piston disc (105) is disposed inside the can body (101), the outer wall of the piston disc (105) is provided with a plurality of guide grooves (106), the outer wall of the piston disc (105) is provided with a sealing ring (107), and the inner wall of the can body (101) is provided with a plurality of guide strips (108), the guide strips (108) being movably embedded in the inner side of the guide grooves (106).

8. The anti-oxidation edible oil packaging and transportation device according to claim 7, characterized in that: A guide rod (109) is fixedly connected to one side of the piston disc (105), and one end of the guide rod (109) extends through one end of the tank body (101).

9. The anti-oxidation edible oil packaging and transportation device according to claim 8, characterized in that: The tank (101) is provided with sealing end caps (102) at both ends, and the guide rod (109) is movably passed through the center of one of the sealing end caps (102). One end of the tank (101) is fixedly connected to a one-way exhaust valve (112), the top of the other end of the tank (101) is fixedly connected to an oil inlet (103), and the bottom of the other end of the tank (101) is fixedly connected to an oil outlet (104).

10. The anti-oxidation edible oil packaging and transportation device according to claim 7, characterized in that: A pressure gauge (110) is provided on the tank (101), and a controller (111) is fixedly installed at one end of the tank (101).

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