Emergency survival tank and packaging method thereof

Abstract

The invention relates to the technical field of food storage, and discloses an emergency survival tank and a packaging method thereof.The emergency survival tank comprises a tank body and a cover body matched with the open end of the tank body, and the packaging method comprises the following steps that compressed food and a survival tool assembly are placed in a cavity of the tank body, and the tank body is placed in a vacuum chamber; the cavity containing the compressed food and the survival tool assembly is vacuumized until the cavity reaches a preset negative pressure state; when the cavity reaches a preset negative pressure state, inert gas and / or protective gas are / is filled into the cavity until the gas environment in the cavity forms a preset gas environment; the cover body is sealed at the opening end of the tank body, so that the closed space for maintaining the gas environment is formed in the cavity, and through the arrangement mode, the gas environment in the cavity can reach the preset gas environment, so that the fresh-keeping period of food in the preset gas environment can meet the requirement of the emergency survival tank for 3-5 years or even longer.

Description

Technical Field

[0001] This invention relates to the field of food storage technology, and in particular to an emergency survival container and its packaging method. Background Technology

[0002] Emergency survival equipment is crucial for responding to natural disasters, wilderness exploration, and public emergencies. The long-term reliable storage of compressed food and survival tools is directly related to the user's safety. An ideal emergency survival container should be able to maintain stable food quality and functional tools for 3 to 5 years, or even longer, in harsh environments without cold chain or power supply.

[0003] However, existing food storage tank technology faces significant technical bottlenecks in achieving this long-term preservation goal. Specifically, most storage tanks currently employ a simple sealing structure, which can extend the shelf life of foods with relatively stable materials and resistance to oxidation to 3 to 5 years. However, for foods rich in easily oxidized components such as peanut oil and sunflower oil, the preservation effect of this structure is significantly reduced, typically only maintaining the food for 1 to 2 years. Although existing technologies attempt to isolate oxygen by combining nitrogen filling with aluminum foil heat sealing, this method can only extend the shelf life by about 1 year compared to traditional sealing methods, still failing to meet the storage requirements for 3 to 5 years or even longer. Summary of the Invention

[0004] This invention provides an emergency survival container and its packaging method to solve the problem that existing food storage containers, which use nitrogen filling and aluminum foil heat sealing to isolate oxygen, cannot meet the requirement that the storage period of the container should be 3-5 years.

[0005] In a first aspect, the present invention provides a method for packaging an emergency survival canister, the emergency survival canister comprising a canister body and a cap adapted to the open end of the canister body, the packaging method comprising the following steps: The compressed food and survival tool components were placed inside the cavity of the canister, which was then placed in a vacuum chamber. Perform a vacuuming operation on the cavity containing compressed food and survival tool components until the cavity reaches a preset negative pressure state; When the cavity reaches the preset negative pressure state, inert gas and / or protective gas are introduced into the cavity until the gas environment inside the cavity forms the preset gas environment. The lid is sealed to the opening of the can, creating a sealed space inside the cavity to maintain the gas environment.

[0006] Beneficial effects: By performing at least one vacuuming and filling of the vacuum chamber with inert gas and / or protective gas, the gas environment inside the chamber can be made to reach the preset gas environment, so that the food in the preset gas environment can meet the requirement of 3-5 years for emergency survival tanks.

[0007] In one optional implementation, the preset negative pressure state includes a preset first air pressure threshold. The step of performing a vacuuming operation on the cavity containing the compressed food and survival tool components until the cavity reaches the preset negative pressure state includes: Obtain the initial air pressure value inside the cavity; When the air pressure drops to or below the preset first air pressure threshold, the vacuuming operation is stopped and the current negative pressure state of the cavity is maintained.

[0008] In one optional implementation, the preset gas environment includes a preset second gas pressure threshold and a preset oxygen concentration threshold. When the cavity reaches a preset negative pressure state, the step of filling the cavity with inert gas and / or protective gas until the gas environment within the cavity forms the preset gas environment includes: Inject inert gas and / or protective gas into the cavity; Obtain the second air pressure value inside the cavity; When the second pressure reaches the preset second pressure threshold, the oxygen concentration inside the cavity is obtained; If the oxygen concentration is higher than the preset concentration threshold, the above-mentioned vacuuming operation and filling with inert gas and / or protective gas operation are repeated until the oxygen concentration in the cavity is equal to or lower than the preset oxygen concentration threshold.

[0009] In one optional embodiment, the cover is a matting cover, comprising an outer cover and an inner cover, and after the step of forming a preset gas environment within the cavity, the method further includes: While maintaining the preset gas environment, seal the inner cover to the opening end. After the inner cover is sealed, seal the outer cover to the opening located on the outside of the inner cover.

[0010] Beneficial effects: When adopting the above technical solution, the lid is a double-lid lid, which includes an outer lid and an inner lid. The inner lid is first sealed to the opening end, and then the outer lid is sealed to the opening end located outside the inner lid. Through the above arrangement, the outer lid and the inner lid form a sealed connection with the opening end, which enables the double-layer seal between the double-lid lid and the opening end, significantly improving the sealing performance of the emergency survival container, thereby ensuring that the food preservation period of the emergency survival container can meet the requirement of 3-5 years.

[0011] In one optional embodiment, the preset second air pressure threshold is less than atmospheric pressure, the inner cover is aluminum foil, and after the step of sealing the inner cover to the open end, the method further includes: After the aluminum foil is sealed to the open end, an inert gas and / or a protective gas are introduced into the vacuum chamber to raise the pressure inside the vacuum chamber to atmospheric pressure. Obtain morphological images or displacement data of the middle part of the inner cover made of aluminum foil; Analyze the morphological images or displacement data to confirm the depth of the indentation in the center of the aluminum foil; The depth of the indentation is used to determine whether the sealing connection between the inner cover and the opening is qualified. When the sealing connection between the inner cover and the opening is in a qualified state, the action of fastening the outer cover to the opening of the tank is performed.

[0012] Beneficial Effects: When adopting the above technical solution, if the preset second pressure threshold is set to be less than atmospheric pressure and the inner cover is made of aluminum foil, the invention can utilize the fact that the second pressure threshold is less than atmospheric pressure and the flexibility of aluminum foil. After the aluminum foil is sealed to the open end, inert gas and / or protective gas are injected into the vacuum chamber to raise the pressure inside the vacuum chamber to atmospheric pressure. This makes the pressure inside the vacuum chamber greater than the pressure inside the sealed cavity. At this time, the aluminum foil sealed to the open end will indent towards the cavity under negative pressure, with the displacement in the middle region of the aluminum foil being particularly significant. Based on the above principle, after the aluminum foil is sealed to the open end, the indentation depth in the middle of the aluminum foil can be confirmed by obtaining a morphological image or displacement data of the middle of the aluminum foil. Finally, the sealing connection status between the aluminum foil and the open end can be confirmed based on the indentation depth in the middle of the aluminum foil, thus further ensuring the sealing performance of the emergency survival canister.

[0013] In one optional implementation, the step of determining whether the sealing connection between the inner cover and the opening end is qualified based on the depth of the indentation includes: If the depth of the indentation reaches the preset depth threshold, the sealing connection between the inner cover and the opening end is deemed to be qualified. And / or, obtain the rebound value of the indentation depth within a preset time after the indentation depth reaches its maximum value; If the rebound value is less than the preset rebound threshold, the sealing connection between the inner cover and the opening end is deemed qualified.

[0014] In one alternative embodiment, after the inner cover sealing connection is completed, the sealing method further includes: After the inner cover is sealed and connected, the third pressure in the vacuum chamber is obtained; The pressure in the vacuum chamber is adjusted based on the third pressure until the third pressure reaches the preset third pressure threshold range, which is less than the atmospheric pressure. While maintaining the preset third air pressure threshold, the step of sealing the outer cover to the open end of the tank is performed.

[0015] Beneficial Effects: Using the above technical solution, after the aluminum foil is sealed to the open end and before the outer cover is sealed to the open end, the air pressure in the vacuum chamber is regulated to reduce the internal air pressure to a preset third air pressure threshold below atmospheric pressure. This ensures that when the outer cover is sealed to the open end, the air pressure between the outer and inner covers is also lower than atmospheric pressure. In other words, the sealed cavity formed between the outer cover and the aluminum foil will maintain a negative pressure state below the external atmospheric pressure. This negative pressure state utilizes the internal and external pressure difference to apply a continuous axial clamping force towards the cavity to the outer cover, forcing the inner side of the outer cover to tightly abut against the connection between the outer cover and the open end. This design overcomes the limitations of traditional multi-seal systems that rely solely on the elasticity of the structural materials or mechanical locking force, achieving a synergistic effect of mechanical locking and air pressure adsorption. It significantly improves sealing reliability, as the additional air pressure adsorption force effectively compensates for material creep and microscopic gaps caused by temperature changes or long-term storage, preventing loosening of the sealing interface. Furthermore, it achieves enhanced technical efficiency through organic integration. For example, this solution is not a simple superposition of sealing elements, but rather an organic structure that combines the mechanical structure of the outer cover with the airtight function of the inner cover through precise control of air pressure parameters. This results in a synergistic effect that is superior to the sum of any single sealing method, thereby significantly extending the shelf life of the emergency survival canister.

[0016] Secondly, the present invention also provides an emergency survival container, which includes an emergency survival container manufactured by the above-described packaging method.

[0017] Beneficial effects: Since the emergency survival container is made by the above-mentioned emergency survival container packaging method, the emergency survival container of the present invention has the effects of the above-mentioned emergency survival container packaging method, which will not be repeated here.

[0018] In one alternative implementation, the compressed food is compressed biscuits; And / or, the survival tool assembly includes a tool storage section and a plurality of survival tools. The tool storage section is detachably snapped into the cavity for storing the plurality of survival tools. When in the installation position, the tool storage section divides the cavity into a food compartment below and a tool compartment above.

[0019] Beneficial effects: By adopting the above technical solution, a tool storage section is provided inside the storage tank. This tool storage section is used to store multiple survival tools, and it is detachably snapped into the inner wall of the cavity. This prevents tools placed inside the tank from impacting the aluminum foil due to the shaking of the emergency survival tank, thus avoiding damage to the aluminum foil or gaps at the sealing connection between the aluminum foil and the opening end, ensuring the airtightness of the emergency survival tank. Furthermore, the tool storage section snapped into the inner wall of the cavity can also keep harder compressed biscuits below the tool compartment, preventing compressed food from impacting and damaging the aluminum foil or creating gaps at the sealing connection between the aluminum foil and the opening end due to tank shaking.

[0020] In one possible implementation, the tool storage section has a disc-shaped structure, with multiple grooves spaced circumferentially on its top surface. These grooves are suitable for accommodating and positioning the survival tools to be stored. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an exploded view of an emergency survival container according to an embodiment of the present invention; Figure 2 This is a schematic flowchart of an emergency survival can packaging method according to an embodiment of the present invention; Figure 3 This is a schematic flowchart of another method for packaging an emergency survival can according to an embodiment of the present invention; Figure 4 This is a schematic flowchart of another method for packaging an emergency survival can according to an embodiment of the present invention; Figure 5 This is a schematic flowchart of another method for packaging an emergency survival canister according to an embodiment of the present invention; Figure 6 This is a schematic flowchart of another method for packaging an emergency survival can according to an embodiment of the present invention; Figure 7 This is a schematic flowchart of another method for packaging an emergency survival can according to an embodiment of the present invention; Figure 8 This is a schematic flowchart illustrating another method for packaging an emergency survival can according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures: 100. Emergency survival container; 1. Lid; 101. Outer cover; 1011. Snap-on cover; 1012. Connecting ring; 102. Inner cover; 2. Container body; 201. Open end; 202. Cavity; 3. Connecting structure; 301. First thread; 302. Second thread; 4. Tool storage section; 401. Groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0025] To address the significant technical bottlenecks in achieving this long-term preservation goal with existing food storage tank technology: for example, most existing food storage tanks use simple sealing structures, resulting in a short shelf life, typically 1-2 years. Although existing storage tanks use nitrogen filling and aluminum foil heat sealing to isolate oxygen, the nitrogen filling and oxygen removal method can only extend the shelf life by about 1 year compared to food storage tanks using traditional sealing methods, which cannot meet the requirement that the storage tanks should have a shelf life of 3-5 years.

[0026] This invention provides an emergency survival canister and its sealing method. The emergency survival canister 100 mainly includes a canister body 2 and a lid 1 adapted to the opening end 201 of the canister body 2. The canister body 2 is made of metal material, preferably tinplate, which has good mechanical strength and corrosion resistance, and can effectively protect the contents from the external environment. The opening end 201 of the canister body 2 is provided with a threaded or snap-fit ​​structure for fastening it to the lid 1.

[0027] The cover 1 is a matte-and-paste structure, including an inner cover 102 and an outer cover 101. The outer cover 101 includes a connecting ring 1012 and a snap-on cover 1011. The outer edge of the connecting ring 1012 is sealed to the opening end 201, and the snap-on cover 1011 is sealed to the inner edge of the connecting ring 1012. The inner cover 102 is made of aluminum foil, which is sealed to the lower surface of the connecting ring 1012. Specifically, the aluminum foil is heat-sealed to the lower surface of the connecting ring 1012, and the snap-on cover 1011 is sealed to the inner edge of the connecting ring 1012. Through the above arrangement, after the outer cover 101 and the inner cover 102 are installed in place, a double seal is formed at the snap-on cover 1011 and the aluminum foil with the connecting ring 1012, ensuring the airtightness of the emergency survival storage tank. It should be noted that during the assembly of the emergency survival canister 100 of the present invention, the outer edge of the connecting ring 1012 is fixedly and sealed to the opening end 201 of the canister body 2 by packaging equipment. Before the outer edge of the connecting ring 1012 is sealed to the opening end 201 of the canister body 2, the aluminum foil has already been sealed to the lower surface of the connecting ring 1012. Thus, the way the aluminum foil is connected to the opening end 201 of the canister body 2 is actually to seal the outer edge of the connecting ring 1012 to the opening end 201 of the canister body 2.

[0028] More specifically, in the specific implementation of the present invention, the inner edge of the connecting ring 1012 has an upwardly extending protruding ring (not shown), and the outer edge of the cover 1011 (not shown) protrudes from the side wall of the cover 1011 so that after the cover 1011 is installed in place, the outer edge of the cover 1011 can abut against the upper surface of the protruding ring.

[0029] It should be noted that although the aluminum foil described above is heat-sealed to the connecting ring 1012, this is not limiting. In other embodiments of the present invention, the aluminum foil and the connecting ring 1012 can also be sealed by adhesive. The inner cover 102 is preferably made of aluminum foil, which has good flexibility and sealing performance, and forms a sealed connection with the opening end 201 of the can body 2 by adhesive bonding.

[0030] Furthermore, despite the above combination Figure 1The described outer cover 101 includes a connecting ring 1012 and a snap-on cover 1011, but this is not limiting. In other embodiments of the invention, the outer cover 101 only includes the snap-on cover 1011, and the outer edge (not shown) of the snap-on cover 1011 protrudes from the side wall of the snap-on cover 1011. The opening end 201 of the tank body 2 is provided with an annular overlapping arm, which is integrally connected to the tank body 2. The inner edge of the annular overlapping arm has a first hole and a second hole with diameters decreasing sequentially from top to bottom. The shoulder formed by the first hole and the second hole serves as a connecting surface. The inner cover 102 is sealed to the connecting surface. For example, when the inner cover 102 is aluminum foil, the aluminum foil is sealed to the connecting surface. The snap-on cover 1011 is sealed to the side wall of the first hole, and the outer edge of the snap-on cover 1011 is sealed to the upper end face of the first hole. However, this is not a limitation. In other embodiments of the present invention, the outer cover 101 and the opening end 201 of the tank body 2 may have other structures, as long as the inner cover 102 and the outer cover 101 can be sealed and connected to the opening end 201 in sequence from the inside to the outside of the tank body 2.

[0031] The tank 2 contains a survival tool assembly, which includes a tool storage section 4 and multiple survival tools (not shown). The tool storage section 4 has a disc-shaped structure, and a connection structure 3 is provided between the tool storage section 4 and the inner wall of the tank 2. Specifically, the connection structure 3 includes a first thread 301 on the inner wall of the cavity 202 and a second thread 302 on the side wall of the tool storage section 4. Specifically, the second thread 302 is an internal thread and is screwed into the first thread 301 on the inner wall of the tank 2. The first thread 301 is an external thread, and the first thread 301 and the second thread 302 can be screwed together so that the tool storage section 4 is screwed into the inner wall of the cavity 202 through the second thread 302 and the first thread 301. When the tool storage section 4 is in the installed position, it divides the cavity 202 of the tank 2 into a food compartment located below and a tool compartment located above. The food compartment is used to store compressed food, preferably compressed biscuits; the tool compartment is used to store survival tools. Multiple grooves 401 are spaced circumferentially on the top surface of the tool storage section 4. The shape of these grooves 401 matches the survival tools to be stored, and is used to accommodate and limit the survival tools to prevent the tools from shifting or colliding with each other when the tank 2 shakes.

[0032] It should be noted that although the connection method described above is screw-in, this is not limiting. Those skilled in the art can also use other detachable forms such as snap-fit ​​or plug-in connections as needed. The detachable design allows tools to be removed from the tool storage section 4 before being taken out, making it more convenient to access survival tools and food.

[0033] In addition, survival tools can be configured according to emergency needs, including but not limited to at least one of the following: sound-generating tools (such as whistles), fire-starting tools (such as waterproof matches and flints), water treatment tools (such as water filters and water purification tablets), distress signals (such as reflectors and signal flags), fishing tools (such as fishhooks and fishing lines), or repair tools (such as sewing kits and tape). The well-designed layout of the tool storage section 4 achieves a compact integration of various tools, facilitating quick access for users.

[0034] The advantages of the above structural design are as follows: Firstly, the detachable connection between the tool storage section 4 and the inner wall of the can 2 prevents tools from impacting the inner cover 102 due to shaking of the can 2, thus preventing damage to the inner cover 102 or gaps at the sealing connection. Secondly, the tool storage section 4 keeps harder compressed biscuits below the tool compartment, preventing compressed food from directly impacting the inner cover 102, further ensuring the integrity of the sealing structure. Simultaneously, the multi-stage sealing structure of the mother-and-child lid provides a good foundation for subsequent sealing methods, ensuring that the can maintain a low-oxygen environment inside the can for a long time after sealing.

[0035] The following reference Figures 2 to 8 The following describes the possible implementation methods of the packaging method for the emergency survival container 100 of the present invention.

[0036] like Figure 2 As shown, in one possible implementation, the sealing method of the emergency survival canister 100 of the present invention includes the following steps: S101: Place the compressed food and survival tool assembly into the cavity 202 of the canister 2, and place the canister 2 in the vacuum chamber; S102: Perform a vacuuming operation on the cavity 202 containing compressed food and survival tool components until the cavity 202 reaches a preset negative pressure state. S103: When the cavity 202 reaches the preset negative pressure state, inert gas and / or protective gas are introduced into the cavity 202 until the gas environment inside the cavity 202 forms the preset gas environment. S104: The cover 1 is sealed to the opening end 201 of the tank 2, so that a sealed space is formed inside the cavity 202 to maintain the gas environment.

[0037] In step S101, compressed food (such as compressed biscuits) and survival tool components are placed in the cavity 202 of the canister 2. Specifically, the tool storage section 4 is first snapped into a predetermined position on the inner wall of the canister 2, and then multiple survival tools are sequentially placed into the grooves 401 of the tool storage section 4; then the compressed food is placed into the food compartment. After filling, the canister 2 is placed in the vacuum chamber, ready for subsequent operations.

[0038] It should be noted that although the above description refers to placing the canister 2 inside the vacuum chamber after filling, this is not restrictive. In the specific implementation of the present invention, the canister 2 can also be placed in the vacuum chamber first, and then the compressed food and survival tool components can be placed inside the canister 2. That is, in this embodiment, the order of placing the canister 2 into the vacuum chamber and placing the compressed food and survival tool components into the canister 2 is not restrictive, and such adjustment does not deviate from the principle of the present invention, and therefore will also fall within the protection scope of the present invention.

[0039] In S102, the vacuum chamber is evacuated through the vacuum system, thereby evacuating the cavity 202 containing the compressed food and survival tool components until the cavity 202 reaches a preset negative pressure state.

[0040] In S103, after the cavity 202 reaches the preset negative pressure state, an inert gas and / or a protective gas are introduced into the vacuum chamber, thereby introducing an inert gas and / or a protective gas into the cavity 202 until the gas environment inside the cavity 202 is formed into the preset gas environment.

[0041] In step S104, the gas environment inside the cavity 202 is set to a preset gas environment. The control packaging device seals the cover 1 within the vacuum chamber to the opening end 201 of the can 2, thereby creating a sealed space inside the cavity 202 that maintains the gas environment. Specifically, the gas filled into the vacuum chamber is a protective gas such as nitrogen or carbon dioxide.

[0042] It should be noted that although the gas filled into the vacuum chamber described above is a protective gas such as nitrogen or carbon dioxide, this is not limiting. In other embodiments of the present invention, the gas filled into the vacuum chamber may also be an inert gas such as helium or argon. However, this is also not limiting. In other embodiments of the present invention, the gas filled into the vacuum chamber may also be a mixture of a protective gas and an inert gas. Such adjustments do not deviate from the principles of the present invention and therefore fall within the protection scope of the present invention.

[0043] like Figure 3 As shown, in one possible implementation, the step of performing a vacuuming operation on the cavity 202 containing compressed food and survival tool components until the cavity 202 reaches a preset negative pressure state includes: S201: Obtain the first air pressure value inside cavity 202; S202: When the air pressure drops to or below the preset first air pressure threshold, stop the vacuuming operation and maintain the current negative pressure state of the cavity 202.

[0044] Specifically, when performing a vacuum pump operation on the vacuum chamber and the cavity 202 of the tank 2, a pressure sensor is used to acquire a first pressure value within the cavity 202 in real time. When the pressure value drops to a preset first pressure threshold, the vacuum pumping is stopped and the negative pressure state is maintained. The range of the first pressure threshold is -0.01 MPa to -0.05 MPa. It should be noted that although the range of the first pressure threshold described above is -0.01 MPa to -0.05 MPa, this is not limiting. In other embodiments of the present invention, the range of the first pressure threshold can also be -0.01 MPa to -0.08 MPa. Such adjustments do not deviate from the principle of the present invention and therefore also fall within the protection scope of the present invention.

[0045] like Figure 4 As shown, in one possible implementation, the step of filling the cavity 202 with inert gas and / or protective gas when the cavity 202 reaches a preset negative pressure state, until the gas environment inside the cavity 202 forms a preset gas environment, includes: S301: Inject nitrogen gas into cavity 202; S302: Obtain the second air pressure value inside cavity 202; S303: When the second pressure reaches the preset second pressure threshold, obtain the oxygen concentration inside the cavity 202; S303: If the oxygen concentration is higher than the preset concentration threshold, the vacuuming operation and nitrogen filling operation are repeated in sequence until the oxygen concentration in the cavity 202 is equal to or lower than the preset oxygen concentration threshold.

[0046] Specifically, in this embodiment, the preset gas environment includes a preset second pressure threshold and a preset oxygen concentration threshold. The preset second pressure threshold is preferably set to be less than atmospheric pressure, for example, 0.07 MPa to 0.08 MPa, and the preset oxygen concentration threshold is not higher than 0.5%. The nitrogen gas introduced into the vacuum chamber has a purity of not less than 99.9%. Through repeated cycles of vacuuming and nitrogen filling, the oxygen content within the cavity 202 can be reduced to an extremely low level, thereby effectively inhibiting the oxidation reaction of food and extending its shelf life.

[0047] It should be noted that although the range of the second air pressure threshold described above is 0.07MPa to 0.08MPa, this is not limiting. In other embodiments of the present invention, the range of the first air pressure threshold can also be 0.07MPa to 0.09MPa. Such adjustment does not deviate from the principle of the present invention and therefore will also fall within the protection scope of the present invention.

[0048] like Figure 5As shown, in one possible implementation, the sealing method of the emergency survival container 100 of the present invention further includes the following steps: S401: Under the condition of maintaining the preset gas environment, seal the inner cover 102 to the opening end 201. S402; After the inner cover 102 is sealed and connected, the outer cover 101 is sealed and connected to the open end 201 located outside the inner cover 102.

[0049] Specifically, the cover 1 is a matte cover, comprising an outer cover 101 and an inner cover 102. Specifically, the outer cover 101 includes a connecting ring 1012 and a snap-on cover 1011, and the lower surface of the connecting ring 1012 is sealed with aluminum foil. After the gas environment within the cavity 202 is formed into a preset gas environment, maintaining this preset gas environment, the clamp of the packaging machine located inside the vacuum chamber controls the end of the connecting ring 1012 to achieve a sealed connection between the connecting ring 1012 and the opening end 201 of the can 2. It should be noted that at this time, the connecting ring 1012 is sealed with the aluminum foil. More specifically, the sealing connection can be a clamp connection or welding applicable to packaging machine scenarios. The connection structure 3 between the connecting ring 1012 and the opening end 201 of the can 2 is not the focus of this invention and is not limiting; therefore, it will not be described in detail here. Then, the packaging machine clamps the end of the cover 1011 in a vacuum chamber and seals the cover 1011 with the connecting ring 1012. Through this arrangement, both the cover 1011 and the inner cover 102 are sealed to the connecting ring 1012. Furthermore, since the outer edge of the connecting ring 1012 is also sealed to the opening 201 of the can body 2, a double-layer seal is indirectly formed between the cover 1011 and the opening 201 of the can body 2. This significantly improves the sealing performance of the emergency survival can 100, thereby ensuring that the food preservation period of the emergency survival can 100 meets the requirement of 3-5 years.

[0050] like Figure 6 As shown, in one possible implementation, the sealing method of the emergency survival container 100 of the present invention further includes the following steps: S501: After the aluminum foil is sealed to the open end 201, an inert gas and / or a protective gas are introduced into the vacuum chamber to raise the pressure inside the vacuum chamber to atmospheric pressure. S502: Obtain a morphological image or displacement data of the middle part of the inner cover 102 made of aluminum foil; S503: Analyze the morphological image or displacement data to confirm the depth of the indentation in the center of the aluminum foil; S504: Determine whether the sealing connection between the inner cover 102 and the opening end 201 is qualified based on the depth of the indentation; S505: When the sealing connection between the inner cover 102 and the opening end 201 is in a qualified state, the action of fastening the outer cover 101 to the opening end 201 of the tank body 2 is performed.

[0051] Specifically, in this embodiment, the inner cover 102 adopts a composite aluminum foil design (hereinafter referred to as aluminum foil). This allows the sealing connection between the aluminum foil and the opening end 201 of the can 2 to be either a sealed adhesive or a heat-sealed connection. After the aluminum foil is sealed, this embodiment also performs a sealing quality test on the connection between the aluminum foil and the opening end 201 of the can 2 to ensure sealing reliability. Specifically, in this embodiment, the sealing performance between the aluminum foil and the connecting ring 1012, and between the connecting ring 1012 and the opening end 201 of the can 2, is tested. The testing method is as follows: an inert gas and / or a protective gas are introduced into the vacuum chamber to raise the air pressure inside the vacuum chamber to atmospheric pressure. Since the air pressure inside the cavity 202 is less than the atmospheric pressure, the aluminum foil will indent into the cavity 202 under the action of the internal and external pressure difference. To make the monitoring data more accurate, in this embodiment, an image of the morphology of the middle part of the aluminum foil is acquired by an image acquisition device, or displacement data of the middle part of the aluminum foil is acquired by a displacement sensor; the image or data is analyzed to confirm the indentation depth of the middle part of the aluminum foil. The sealing condition of the inner cover 102 is determined based on the depth of the indentation.

[0052] like Figure 7 As shown, in one possible implementation, the step of determining whether the sealing connection status between the inner cover 102 and the opening end 201 is qualified based on the indentation depth of the present invention includes the following steps: S601: If the dent depth reaches the preset depth threshold, the sealing connection between the inner cover 102 and the opening end 201 is deemed to be qualified. S602: Obtain the rebound value of the indentation depth within a preset time after the indentation depth reaches its maximum value; S603: If the rebound value is less than the preset rebound threshold, the sealing connection between the inner cover 102 and the opening end 201 is deemed to be qualified.

[0053] Specifically, in this embodiment, the criteria for determining whether the seal between the aluminum foil and the opening end 201 is qualified based on the central depression of the aluminum foil include: if the depression depth reaches a preset depth threshold, such as 2-5mm, the seal is qualified; and / or, obtaining the rebound value within a preset time period (such as 30 seconds) after the depression depth reaches its maximum value, if the rebound value is less than a preset rebound threshold (such as 0.5mm), the seal is qualified. If qualified, proceed to the next step; if unqualified, reject the product and repackage it. This improves the overall sealing performance of emergency storage.

[0054] like Figure 8As shown, in one possible implementation, after the sealing connection of the inner cover 102 is completed, the packaging method of the present invention further includes: S701: Obtain the third pressure in the vacuum chamber; S702: Adjust the pressure in the vacuum chamber based on the third pressure until the third pressure reaches the preset third pressure threshold range, where the third pressure threshold is less than atmospheric pressure; S703: While maintaining the preset third air pressure threshold, perform the step of sealing the outer cover 101 to the open end 201 of the tank 2.

[0055] Specifically, in this embodiment, after the aluminum foil is sealed to the opening end 201, a third pressure inside the vacuum chamber is obtained through a pressure sensor. This third pressure may be equal to, less than, or greater than atmospheric pressure. The control system adjusts the current pressure inside the vacuum chamber based on this third pressure to bring it within a preset third pressure threshold range. The upper limit of this third pressure threshold range is less than atmospheric pressure. Based on this, after adjusting the pressure inside the vacuum chamber to the third threshold range, the outer cover 101 is then sealed to the opening end 201 of the tank body 2.

[0056] With the above-mentioned setup, after the aluminum foil is sealed and connected to the opening end 201, and before the outer cover 101 is locked, the air pressure in the vacuum chamber is regulated so that the air pressure inside the vacuum chamber is reduced to a preset third air pressure threshold that is lower than atmospheric pressure. In this way, when the outer cover 101 and the aluminum foil are sealed and connected to the opening end 201 by pressing, the air pressure between the outer cover 101 and the inner cover 102 is also lower than atmospheric pressure. That is, the sealed cavity 202 formed between the outer cover 101 and the aluminum foil will be in a negative pressure state that is lower than the external atmospheric pressure.

[0057] This negative pressure state utilizes the internal and external pressure difference to apply a continuous axial clamping force towards the cavity 202 to the outer cover 101, forcing the inner side of the outer cover 101 to tightly abut against the aluminum foil and the opening end 201 of the can 2. This design breaks through the limitations of traditional multi-seal systems that rely solely on the elasticity of the structural materials or mechanical locking force, achieving a synergistic effect of mechanical locking and air pressure adsorption.

[0058] Furthermore, the aforementioned configuration significantly improves sealing reliability. The additional air pressure adsorption effectively compensates for material creep and microscopic gaps caused by temperature changes or long-term storage, preventing loosening of the sealing interface. It also achieves synergistic effects through organic integration. This solution is not a simple superposition of sealing elements, but rather an organic combination of the mechanical structure of the outer cover 101 and the airtight function of the inner cover 102 through precise control of air pressure parameters. This results in a synergistic effect superior to the sum of any single sealing method, thereby significantly extending the shelf life of the emergency survival canister 100.

[0059] In a specific implementation of the present invention, the outer cover 101 is made of tinplate, which is the same material as the tank body 2, and the side wall of the cover 1011 is provided with a first snap-fit ​​structure (not shown), and the inner wall of the connecting ring 1012 is provided with a second snap-fit ​​structure (not shown), so that when the cover 1011 is installed in place, the first snap-fit ​​structure and the second snap-fit ​​structure snap into each other, and under the positioning effect of the first snap-fit ​​structure and the second snap-fit ​​structure snapping into each other, the outer edge of the cover 1011 can be sealed and connected to the upper surface of the connecting ring 1012.

[0060] Preferably, the first snap-fit ​​structure can be an annular groove extending circumferentially along the outer sidewall of the cover 1011, and the second snap-fit ​​structure can be an annular protrusion extending circumferentially along the inner sidewall of the connecting ring 1012. The positions of the annular groove and the annular protrusion are configured such that when the cover 1011 is installed in place, the annular groove and the annular protrusion snap into each other, allowing the lower surface of the outer edge of the cover 1011 to seal and press against the upper surface of the connecting ring 1012. The annular groove is coaxial with the outer cover 101, the annular protrusion is coaxial with the tank body 2, and the opening end 201 is coaxial with the tank body 2. Specifically, the opening end 201 is a stepped surface (not marked) located at the opening position of the tank body 2 and coaxially arranged with the tank body 2.

[0061] Preferably, in a specific implementation of the present invention, the side wall of the cover 1011 is also fitted with a first sealing ring, and the inner side wall of the connecting ring 1012 is also fitted with a second sealing ring. The positions of the first sealing ring and the second sealing ring are set such that when the cover 1011 is installed in place, the first sealing ring and the second sealing ring seal against each other, thereby achieving a sealed connection between the cover 1011 and the inner side wall of the connecting ring 1012.

[0062] It should be noted that the range of the third atmospheric pressure threshold is determined by the designers based on experience, experiments, calculations, etc. For example, the range of the third atmospheric pressure threshold is 0.08 MPa to 0.092 MPa. However, this is not restrictive. Obviously, the range of the third atmospheric pressure threshold can also be other values, as long as the upper limit of the range of the third atmospheric pressure threshold is lower than the atmospheric pressure.

[0063] Furthermore, although the first snap-fit ​​structure is the first groove 401 and the second snap-fit ​​structure is the first protrusion, this is not limiting. In other embodiments of the present invention, the first snap-fit ​​structure and the second snap-fit ​​structure can also be other... Preferably, in the specific implementation of the present invention, in order to better achieve the synergistic effect of mechanical locking and air pressure adsorption between the cover 1011 and the connecting ring 1012, the upper limit of the range of the third air pressure threshold can be set to be lower than the lower limit of the range of the second air pressure threshold. Thus, after the aluminum foil and the connecting ring 1012 are sealed together, the air pressure inside the vacuum chamber is adjusted to be lower than the air pressure inside the canister 2. At this time, the aluminum foil will deform away from the canister 2 under the action of the air pressure difference. This will not cause damage to the aluminum foil, nor will it cause cracks at the connection between the aluminum foil and the opening end 201 due to stress. Furthermore, it can further enhance the synergistic effect of mechanical locking and air pressure adsorption between the cover 1011 and the connecting ring 1012, thereby further improving the sealing performance of the emergency survival canister 100.

[0064] Preferably, in a specific implementation of the present invention, in order to achieve a better sealing connection between the cover 1011 and the connecting ring 1012, a sealing gasket can be provided on the lower surface of the outer edge of the cover 1011, so that after the cover 1011 is installed in place, the sealing gasket can fill the gap between the outer edge of the cover 1011 and the connecting ring 1012, thereby ensuring the sealing performance of the cover 1011 and the connecting ring 1012.

[0065] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for sealing an emergency survival canister, characterized in that, The emergency survival container (100) includes a container body (2) and a cover (1) adapted to the open end (201) of the container body (2). The sealing method includes the following steps: The compressed food and survival tool assembly are placed in the cavity of the canister (2), and the canister (2) is placed in a vacuum chamber; A vacuum operation is performed on the cavity containing the compressed food and the survival tool assembly until the cavity reaches a preset negative pressure state; When the cavity reaches the preset negative pressure state, inert gas and / or protective gas are introduced into the cavity until the gas environment inside the cavity forms the preset gas environment. The cover (1) is closed at the opening end (201) of the can (2), so that a sealed space is formed inside the cavity to maintain the gas environment.

2. The sealing method of the emergency survival canister according to claim 1, characterized in that, The preset negative pressure state includes a preset first air pressure threshold. The step of performing a vacuuming operation on the cavity containing the compressed food and the survival tool assembly until the cavity reaches the preset negative pressure state includes: Obtain the first air pressure value inside the cavity; When the air pressure drops to a value equal to or below a preset first air pressure threshold, the vacuuming operation is stopped and the current negative pressure state of the cavity is maintained.

3. The sealing method of the emergency survival canister according to claim 1, characterized in that, The preset gas environment includes a preset second gas pressure threshold and a preset oxygen concentration threshold. The step of filling the cavity with inert gas and / or protective gas when the cavity reaches the preset negative pressure state until the gas environment in the cavity forms the preset gas environment includes: Inject the inert gas and / or protective gas into the cavity; Obtain the second air pressure value inside the cavity; When the second air pressure reaches the preset second air pressure threshold, the oxygen concentration inside the cavity is obtained; If the oxygen concentration is higher than the preset concentration threshold, the above-mentioned vacuuming operation and filling with inert gas and / or protective gas operation are repeated until the oxygen concentration in the cavity is equal to or lower than the preset oxygen concentration threshold.

4. The sealing method of the emergency survival canister according to claim 3, characterized in that, The cover (1) is a double-lid cover, which includes an outer cover (101) and an inner cover (102). After the step of forming a preset gas environment in the cavity, the method further includes: While maintaining the preset gas environment, the inner cover (102) is sealed to the opening end (201); After the inner cover (102) is sealed and connected, the outer cover (101) is sealed and connected to the opening end (201) located outside the inner cover (102).

5. The sealing method of the emergency survival container according to claim 4, characterized in that, The preset second air pressure threshold is less than atmospheric pressure, the inner cover (102) is made of aluminum foil, and after the step of sealing the inner cover (102) with the opening end (201), the method further includes: After the aluminum foil is sealed to the opening end (201), the inert gas and / or protective gas are filled into the vacuum chamber to raise the gas pressure in the vacuum chamber to atmospheric pressure. Obtain a morphological image or displacement data of the middle part of the inner cover (102) made of aluminum foil; Analyze the morphological image or displacement data to confirm the depth of the indentation in the middle of the aluminum foil; Based on the depth of the indentation, determine whether the sealing connection between the inner cover (102) and the opening end (201) is qualified; When the sealing connection between the inner cover (102) and the opening end (201) is in a qualified state, the action of fastening the outer cover (101) to the opening end (201) of the tank body (2) is performed.

6. The sealing method of the emergency survival container according to claim 5, characterized in that, The step of determining whether the sealing connection between the inner cover (102) and the opening end (201) is qualified based on the indentation depth includes: If the depth of the indentation reaches a preset depth threshold, the sealing connection between the inner cover (102) and the opening end (201) is determined to be qualified. And / or, within a preset time period after the indentation depth reaches its maximum value, obtain the rebound value of the indentation depth; If the rebound value is less than the preset rebound threshold, the sealing connection between the inner cover (102) and the opening end (201) is deemed to be qualified.

7. The method for sealing an emergency survival container according to any one of claims 4-6, characterized in that, After the sealing connection of the inner cover (102) is completed, the encapsulation method further includes: After the inner cover (102) is sealed and connected, the third gas pressure in the vacuum chamber is obtained; The pressure in the vacuum chamber is adjusted based on the third pressure until the third pressure reaches a preset third pressure threshold range, where the third pressure threshold is less than atmospheric pressure. While maintaining the preset third air pressure threshold, the step of sealing the outer cover (101) to the opening end (201) of the tank (2) is performed.

8. An emergency survival container, characterized in that, The emergency survival container (100) includes an emergency survival container (100) made by the packaging method of the emergency survival container (100) according to claims 1-9.

9. The emergency survival container according to claim 8, characterized in that, The compressed food is compressed biscuits; And / or, the survival tool assembly includes a tool storage section (4) and a plurality of survival tools, the tool storage section (4) being detachably snapped into the cavity for storing the plurality of survival tools, the tool storage section (4) dividing the cavity into a food compartment below and a tool compartment above when in the installation position.

10. The emergency survival container according to claim 9, characterized in that, The tool storage section (4) has a disc-shaped structure, and a plurality of grooves (401) are spaced apart along the circumference on its top surface. The plurality of grooves (401) are suitable for accommodating and limiting the survival tools to be stored.

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