A Remote Sample Encapsulation and Isolation Device and Method

Abstract

The present invention discloses a remote sample encapsulation and isolation device. It includes: a sealed tank body, a sealed cover, a spring, a rubber ring, a rubber ring bottom seal, etc. After the sample completes attitude adjustment, an external push rod pushes the sealed cover so that the sample enters the cover, and then they are pushed together towards the sealed tank body. The rubber ring bottom seal and the rubber ring in the groove first come into contact with it, and the spring is gradually compressed to cause the rubber ring to be deformed under pressure to form a seal. When the push rod continues to advance, the indium-silver alloy along the circumferential edge of the lower surface of the top end of the inner sealed cover is squeezed against the knife edge at the entrance of the sealed tank, and the knife edge on the outer wall of the sealed cover is squeezed against the soft metal layer on the inner wall of the sealed tank body to form a double extrusion seal. During this process, the first encapsulation bag and the second encapsulation bag are attached, and the heating wire heats them to be welded to form a third-layer sealing structure. The present invention is a compact isolation and encapsulation mechanism, and the whole process of realizing the action is also simple and reliable.

Description

Technical Field

[0001] The present invention belongs to a remote sampling sealing device, and particularly relates to a remote sample encapsulation and isolation device and method. Background Art

[0002] In the future, humans will conduct deep space exploration, exploring the solar system, Mars, asteroids, etc., to search for information on extraterrestrial life.

[0003] For the exploration mission of Mars, it mainly includes exploring the life activity information of Mars, including whether there was life on Mars in the past and now, the conditions and environment for the survival of Mars life, as well as the exploration of the origin of life and extraterrestrial life.

[0004] For the scientific research on the Mars itself, it will include the exploration of the Martian magnetosphere, ionosphere and atmosphere and environmental science, including the topography, geomorphic features and zoning of Mars, the composition and distribution of surface materials on Mars, and the geological features and tectonic zoning; for the internal structure and composition of Mars, the origin and evolution of Mars will also be further studied and explored. Ouyang Ziyuan said that under the overall goal of "serving the sustainable development of human society", the possibility of long-term transformation of Mars and the establishment of a second human habitat through large-scale immigration in the future will be explored.

[0005] Current plans show that the exploration of Mars will adopt a combined exploration method of an orbiter and a Mars rover. It is planned to achieve landing and roving on Mars in 2020 and sample return on Mars in 2030.

[0006] The remote sampling and return mission belongs to the protection requirements of Category V, and the strictest control means are taken during the return. In order to prevent the release of materials from extraterrestrial planets into the Earth's biosphere, the returned samples must be sealed, and this must be completed before the return vehicle enters the orbit of returning to the Earth. For the remote unmanned sampling and return mission, it is necessary to automatically complete the sealing of the samples and the detection of the sealing effect, and it is necessary to specifically carry out research on the automatic encapsulation and isolation technology of the sample on-orbit container. Summary of the Invention

[0007] The purpose of the present invention is to provide a remote sample encapsulation and isolation device and method in view of the deficiencies of the prior art.

[0008] The technical solution adopted by the present invention is:

[0009] On the one hand, the present invention provides a remote sample encapsulation and isolation device, including a sealed tank body, an inner sealing cover and an outer sealing cover;

[0010] The sealed tank body is in the shape of a hollow cylindrical tube, with its bottom sealed and its top open; a soft metal wall is provided on the inner wall of the sealed tank body, and the soft metal wall is arranged in a tapered surface with a wider top and a narrower bottom; a circular groove is provided along the circumference of the lower surface of the top end of the inner sealing cover, and an indium-silver alloy is filled in the groove; a heating wire and a heat conduction structure protruding from the inner surface of the sealed tank body are preset along the bottom of the inner side of the sealed tank body, and the first packaging bag is attached to the inner bottom surface of the sealed tank body;

[0011] The inner sealing cover is in the shape of a hollow cylindrical tube, with its top sealed and its bottom open; the outer side wall of the inner sealing cover is in the shape of a tapered surface with a wider top and a narrower bottom, and a first cutting edge structure is provided thereon, and there is a metal coating on the first cutting edge structure, and a second cutting edge structure is provided along the outer edge of the lower surface of the top end of the inner sealing cover; a rubber ring is provided between the outer wall of the inner sealing cover and the inner wall of the sealed tank body; the second packaging bag is attached to the inner surface and the bottom surface of the inner sealing cover, and its material is polytetrafluoroethylene;

[0012] During sealing, the inner sealing cover is inserted downward into the sealed tank body to the extreme position, the second packaging bag on the bottom surface of the inner sealing cover contacts the first packaging bag on the upper surface of the bottom of the sealed tank body, and after the heating wire is energized, the first packaging bag and the second packaging bag are welded by heating through the heat conduction structure of the sealed tank body; the first cutting edge structure on the inner sealing cover is squeezed into the soft metal wall, the metal coating on the first cutting edge structure and the soft metal of the soft metal wall are co-infiltrated, the second cutting edge structure is squeezed into the indium-silver alloy, and the rubber ring is squeezed to realize the sealing between the inner sealing cover and the sealed tank body;

[0013] The outer sealing cover is arranged on the upper surface of the top of the inner sealing cover, and a stepping motor for pushing the inner sealing cover to move downward is arranged inside the outer sealing cover.

[0014] Preferably, the soft metal wall forms a 60-degree angle with the first cutting edge structure on the sealing cover, and the ratio of the depth that the second cutting edge structure is squeezed into the indium-silver alloy to the depth that the first cutting edge structure is squeezed into the soft metal wall needs to be equal to the angle ratio of their respective angles with the horizontal plane.

[0015] Preferably, the material of the soft metal wall is selected from gold, silver or nickel; the material of the metal coating is gold, silver or nickel; the first cutting edge structure and the second cutting edge structure use magnesium alloy or stainless steel as the cutting edge material.

[0016] Preferably, the sealed tank body, the inner sealing cover and the outer sealing cover are concentrically arranged.

[0017] Preferably, the sealed tank body is fixed on the wall of the remote detector, and a buckle is provided at the bottom end of the side wall of the outer sealing cover, and the buckle can be firmly clamped with the buckle structure on the wall of the remote detector through rotation to realize the fixation of the outer sealing cover and the external wall of the remote detector.

[0018] Preferably, a first encapsulation bag and a second encapsulation bag are arranged between the bottom surface of the inner sealing cover and the upper surface of the bottom of the sealed tank body. The encapsulation bag is made of polytetrafluoroethylene, and the thickness of the encapsulation bag is 0.5-2 mm. When the sealing is completed, the heating wire at the bottom of the sealed tank body is heated to fuse the two encapsulation bags together to form a sleeve bag seal.

[0019] Preferably, the rubber ring is an O-ring with a wire diameter of 2.65 mm, and the rubber ring is made of low phenyl silicone rubber G305 compound.

[0020] Preferably, a stepping motor and a driver for controlling the stepping motor are fixedly arranged on the top inside the outer sealing cover. The output end of the stepping motor is connected to a screw rod. A screw thread is arranged on the upper surface of the top end of the inner sealing cover. The screw rod is arranged inside the screw thread, and the inner sealing cover can be pushed to move downward by the rotation of the stepping motor.

[0021] Preferably, the thrust provided by the stepping motor to the inner sealing cover is greater than the force required for the second knife-edge structure to squeeze into the indium-silver alloy and less than the force that causes deformation of the inner sealing cover, the outer sealing cover, and the buckle.

[0022] On the other hand, the present invention also proposes a remote sample encapsulation and isolation method based on the above device, which includes the following steps:

[0023] 1) After the sample completes attitude adjustment, an external push rod pushes the double sealing cover composed of the inner sealing cover and the outer sealing cover and the sample, so that the inner sealing cover and the sample enter the sealed tank body.

[0024] 2) When the outer sealing cover reaches the bulkhead of the remote detector, the external push rod controls the double sealing cover to rotate so that the buckle on the outer sealing cover locks with the buckle structure on the bulkhead. Then, the stepping motor on the outer sealing cover operates to push the inner sealing cover to continue moving into the sealed tank body.

[0025] 3) During the process of the inner sealing cover moving into the sealed tank body, the rubber ring on the inner side of the sealed tank body first contacts the outer conical surface of the inner sealing cover. The rubber ring is compressed and deformed to form a seal. Continuing to move forward, the indium-silver alloy along the periphery of the lower surface of the top end of the inner sealing cover is squeezed with the second knife-edge structure at the entrance of the sealed tank body to make it reach the yield strength for sealing. At the same time, the first knife-edge structure on the outer wall of the sealing cover is squeezed with the soft metal wall of the inner wall of the sealed tank body, and the metal coating on the first knife-edge structure is supplemented into the gap to form a double extrusion seal. After the second encapsulation bag on the lower surface of the inner sealing cover contacts the first encapsulation bag at the bottom of the sealed tank body, the heating wire is energized to fuse the encapsulation bags together, and finally, an excellent sealing effect is achieved through a triple sealing structure.

[0026] The beneficial effects of the present invention:

[0027] 1. The remote sample encapsulation and isolation device of the present invention adopts a bag - sleeving sealing structure, which mainly consists of a first encapsulation bag, a second encapsulation bag and a heating wire. The material of the encapsulation bag is polytetrafluoroethylene, which has excellent cold and heat resistance and meets the requirements of the remote working environment. When the sealing cover is installed in place, the heating wire heats the encapsulation bag to make it welded, forming a first - layer sealing structure. This sealing requires less energy and less time than traditional welding sealing, and the sealing effect is also relatively reliable.

[0028] 2. The first knife - edge sealing structure of the present invention mainly consists of a first knife - edge and a soft - metal wall, and adopts the sealing method of extruding soft metal. By extruding the knife - edge, the soft metal (such as gold, silver, etc.) is deformed to fit the side surface of the first knife - edge structure. The surface metal coating (such as gold, silver, nickel, etc.) on the side surface of the first knife - edge structure and the soft metal are co - infiltrated to form a second - layer sealing structure. This sealing operation is simple, does not require additional energy, has no extra products, and the sealing effect is also relatively reliable.

[0029] 3. The second knife - edge sealing structure of the present invention mainly consists of a second knife - edge and an indium - silver alloy. The knife - edge sealing method uses hard metals (such as magnesium - lithium alloy, stainless steel, etc.) as the knife - edge material, and the indium - silver alloy is filled in the notch on the tank body as the sealing material. The design optimization goal of the knife - edge size is the minimum pressing force required to extrude the indium - silver alloy for sealing, and the design of the notch size is to meet the reliable assembly and fixation of the indium - silver alloy. In addition, indium is a phase - change material, and by changing the composition of the alloy, a specific melting point can be achieved to meet the requirements of the remote environment, and it has a wider application range. As the third - layer sealing structure, its reliability is stronger.

[0030] 4. The rubber - ring sealing of the present invention is used as an auxiliary sealing structure. According to the requirements of the sealing strength, O - rings with different wire diameters are selected and the corresponding sealing - groove structures are designed. The rubber - ring uses low - phenyl silicone rubber G305 rubber material, which is suitable for the external environment and enhances the sealing performance.

[0031] 5. The bag - sleeving sealing effect of the present invention is stable, and the sealing process has minimal impact on the sample. The cooperation of the double knife - edges with different cutting angles is more reliable. Combining with the rubber - ring sealing finally forms a redundant sealing structure, with a higher encapsulation strength, and the multiple - sealing structure can achieve an excellent sealing effect. Brief Description of the Drawings

[0032] Figure 1 is the three - dimensional view of the overall structure of the present invention.

[0033] Figure 2 is the cross - sectional view of the overall structure of the present invention.

[0034] Figure 3 is the partial enlarged view of the second knife - edge sealing structure of the present invention.

[0035] Figure 4 is the partial enlarged view of the bag - sleeving sealing structure of the present invention.

[0036] In the figure, 1 is a sealed tank body; 2 is an inner sealing cover; 3 is an outer sealing cover; 4 is a satellite cabin wall; 5 is a stepper motor; 6 is a driver; 7 is a screw; 8 is a screw thread; 9 is an interlayer seal; 10 is a first cutting edge; 11 is a soft metal wall; 12 is a rubber ring; 13 is a second cutting edge; 14 is an indium-silver alloy; 15 is a sample; 16 is a second packaging bag; 17 is a first packaging bag; 18 is a heating wire. Specific implementation mode

[0037] The present invention will be further described and illustrated below in conjunction with specific implementation modes. The embodiments are only examples of the present disclosure and do not delimit the scope of limitation. The technical features of each implementation mode of the present invention can be combined correspondingly without conflict.

[0038] This embodiment provides a remote sample encapsulation and isolation device, which mainly includes a sealed tank body 1, an inner sealing cover 2 and an outer sealing cover 3. The sealed tank body 1 is installed on the wall 4 of the remote detector cabin. When the remote detector performs a detection task on the remote ground, the selected sample is placed in the sealed tank body for encapsulation. The sealed tank body 1 is fixed on the wall of the remote detector cabin. A buckle is provided at the bottom end of the side wall of the outer sealing cover. The buckle can be firmly clamped with the buckle structure on the wall of the remote detector cabin through rotation to realize the fixation of the outer sealing cover and the wall of the remote detector cabin.

[0039] Among them, the sealed tank body 1 is in the shape of a hollow cylinder, with its bottom end sealed and its top end open; a soft metal wall 11 is provided on the inner wall of the sealed tank body 1, and the soft metal wall 11 is arranged in a tapered surface that is wider at the top and narrower at the bottom; an indium-silver alloy 14 is provided along the circumference of the lower surface of the inner sealing cover 2. The material used for the soft metal wall 11 of the present invention can be gold, silver, nickel, etc.;

[0040] The inner sealing cover 2 is in the shape of a hollow cylinder, with its top end sealed and its bottom end open; the outer side wall of the inner sealing cover 2 is an outer tapered surface that is wider at the top and narrower at the bottom, on which a first cutting edge structure 10 is provided, and a second cutting edge structure 13 is provided along the outer edge of the lower surface of its top end; a rubber ring 12 is provided between the outer wall of the inner sealing cover 2 and the inner wall of the sealed tank body 1.

[0041] The first cutting edge structure 10 is circular, with a triangular cross-section, and the bottom surface is located on the outer wall of the inner sealing cover. The material is stainless steel, magnesium-lithium alloy, etc. The angle of the cutting edge is 45°, and the angle with the soft metal wall is 60°. The outer surface of the cutting edge has a coating, and the coating material can be gold, silver, nickel, etc.; the second cutting edge structure 13 is located on the bottom surface of the upper half of the inner sealing cover in contact with the sealed tank body, and is also circular, with a triangular cross-section, one side is vertical, and the adjacent side forms a 60° angle with the vertical surface. Its width and height are calculated and determined according to the sealing strength requirements. The material is a hard metal such as stainless steel or magnesium alloy that is corrosion-resistant and resistant to high and low temperatures, and the surface has a coating, which can be gold, silver, nickel, etc.

[0042] During sealing, the inner sealing cover 2 is inserted downward into the sealed tank body 1 to the extreme position. The rubber ring on the inner side of the sealed tank body first contacts the outer conical surface of the inner sealing cover. The rubber ring is compressed and deformed to form a seal. When it continues to move forward, the indium-silver alloy along the perimeter of the lower surface of the top end of the inner sealing cover is extruded with the second cutting edge structure at the entrance of the sealed tank body to make it reach the yield strength for sealing. At the same time, the first cutting edge structure on the outer wall of the sealing cover is extruded with the soft metal wall on the inner wall of the sealed tank body, and the metal coating on the first cutting edge structure is supplemented into the gap to form a double extrusion seal. After the second packaging bag 16 on the lower surface of the inner sealing cover contacts the first packaging bag 17 at the bottom of the sealed tank body, the heating wire is energized to weld the packaging bags together to form a sleeve bag seal. Finally, an excellent sealing effect is achieved through a triple sealing structure, realizing the sealing between the inner sealing cover and the sealed tank body;

[0043] The outer sealing cover 3 is arranged on the upper surface of the top of the inner sealing cover 2, and a stepping motor for pushing the inner sealing cover 2 to move downward is arranged inside the outer sealing cover 3.

[0044] In a specific embodiment of the present invention, the sealed tank body 1, the inner sealing cover 2, and the outer sealing cover 3 are concentrically arranged. The conical angle of the soft metal wall 11 needs to form a 60-degree angle with the angle of the first cutting edge structure on the sealing cover. The ratio of the depth of the second cutting edge structure squeezing into the indium-silver alloy to the depth of the first cutting edge structure squeezing into the soft metal wall needs to be equal to the angle ratio of their respective angles with the horizontal plane.

[0045] In a specific embodiment of the present invention, a first packaging bag 17 and a second packaging bag 16 are arranged between the bottom surface of the inner sealing cover and the upper surface of the bottom of the sealed tank body. The packaging bag material is made of polytetrafluoroethylene, and the thickness of the packaging bag is 0.5 - 2 mm; when the sealing is completed, the heating wire at the bottom of the sealed tank body is heated to weld the two packaging bags together to form a sleeve bag seal.

[0046] In a specific embodiment of the present invention, a stepping motor 5 and a driver 6 for controlling the stepping motor are fixedly arranged on the top inside the outer sealing cover 3; the output end of the stepping motor is connected to a screw rod; a thread 8 is arranged on the upper surface of the top end of the inner sealing cover 2; the screw rod is arranged inside the thread 8, and the inner sealing cover 2 can be pushed to move downward by the rotation of the stepping motor.

[0047] The thrust provided by the stepping motor to the inner sealing cover is greater than the force required for the second cutting edge structure to squeeze into the indium-silver alloy, and less than the force that causes the deformation of the inner sealing cover, the outer sealing cover, and the buckle.

[0048] After the inner sealing cover is combined with the sealed tank body, the depth of the second cutting edge structure pressing into the indium-silver alloy and the depth of the first cutting edge structure pressing into the soft metal wall need to meet the thrust requirement and the sealing strength requirement, and the sealing can be completed under the preset thrust condition. At the same time, the combined force after extrusion should be greater than ten times the gravity of the sample.

[0049] During the extrusion process between the first cutting edge structure and the soft metal wall, the amount of deformation of the side wall of the sealed tank caused by the force applied to it needs to be calculated in advance as an influencing factor and added to the extrusion depth test of the first cutting edge structure, so that the sealing strength is not affected by the deformation of the side wall of the sealed tank.

[0050] The working process of sample on-orbit container encapsulation and isolation based on the said device is as follows:

[0051] In the initial state, after the sample completes attitude adjustment, the external push rod pushes the double-sealing cover composed of the inner sealing cover 2 and the outer sealing cover 3 and the sample, so that the inner sealing cover 2 and the sample enter the sealed tank 1.

[0052] When the outer sealing cover 3 reaches the satellite cabin wall, the external push rod controls the double-sealing cover to rotate so that the buckle on the outer sealing cover locks with the buckle structure on the cabin wall, and then the stepping motor on the outer sealing cover 3 acts to push the inner sealing cover to continue moving into the sealed tank.

[0053] During the process of the inner sealing cover moving into the sealed tank, the rubber ring on the inner side of the sealed tank first contacts the outer conical surface of the inner sealing cover, and the rubber ring is compressed and deformed to form a seal. Continuing to move forward, the indium-silver alloy along the periphery of the lower surface of the top end of the inner sealing cover is extruded with the second cutting edge structure at the entrance of the sealed tank and makes it reach the yield strength for sealing. At the same time, the first cutting edge structure on the outer wall of the sealing cover is extruded with the soft metal wall on the inner wall of the sealed tank, and the metal coating on the first cutting edge structure is supplemented into the gap to form a double extrusion seal. After the packaging bag 2 on the lower surface of the inner sealing cover contacts the packaging bag 1 at the bottom of the sealed tank, the heating wire is energized to weld the packaging bags together, and finally an excellent sealing effect is achieved through the triple-sealing structure.

[0054] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. For those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A remote sample encapsulation and isolation device, characterized in that It includes a sealed tank body (1), an inner seal cover (2) and an outer seal cover (3); The sealed tank body (1) is in the shape of a hollow cylindrical tube, with its bottom sealed and its top open; a soft metal wall (11) is provided on the inner wall of the sealed tank body (1), and the soft metal wall (11) is arranged in a conical surface with a wider upper part and a narrower lower part; a circular groove is provided along the periphery of the lower surface of the top end of the inner seal cover (2), and indium-silver alloy (14) is filled in the groove; a heating wire (18) and a heat conduction structure protruding from the inner surface of the sealed tank body are preset around the bottom inside of the sealed tank body, and the first packaging bag is attached to the bottom surface inside the sealed tank; The inner seal cover (2) is in the shape of a hollow cylindrical tube, with its top sealed and its bottom open; the outer side wall of the inner seal cover (2) is in the shape of a conical surface with a wider upper part and a narrower lower part, and a first knife-edge structure (10) is provided thereon, and there is a metal coating on the first knife-edge structure (10); a second knife-edge structure (13) is provided along the outer edge of the lower surface of the top end of the inner seal cover (2); a rubber ring (12) is provided between the outer wall of the inner seal cover (2) and the inner wall of the sealed tank body (1); the second packaging bag is attached to the inner surface and the bottom surface of the inner seal cover, and its material is polytetrafluoroethylene; During sealing, the inner seal cover (2) is inserted downward into the sealed tank body (1) to the extreme position, the second packaging bag on the bottom surface of the inner seal cover contacts the first packaging bag on the upper surface of the bottom of the sealed tank body, and after the heating wire is energized, the first packaging bag and the second packaging bag are welded by heating through the heat conduction structure of the sealed tank body; the first knife-edge structure on the inner seal cover is squeezed into the soft metal wall, the metal coating on the first knife-edge structure and the soft metal of the soft metal wall are co-diffused, the second knife-edge structure is squeezed into the indium-silver alloy, and the rubber ring (12) is squeezed to realize the seal between the inner seal cover and the sealed tank body; The outer seal cover (3) is arranged on the upper surface of the top of the inner seal cover (2), and a stepping motor for pushing the inner seal cover (2) to move downward is arranged inside the outer seal cover (3).

2. The remote sample encapsulation and isolation device according to claim 1, wherein The soft metal wall (11) forms an angle of 60 degrees with the first knife-edge structure on the seal cover, and the ratio of the depth that the second knife-edge structure is squeezed into the indium-silver alloy to the depth that the first knife-edge structure is squeezed into the soft metal wall needs to be equal to the angle ratio of their respective angles with the horizontal plane.

3. The remote sample encapsulation and isolation device according to claim 1, characterized in that, The material of the soft metal wall (11) is selected from gold, silver or nickel; the material of the metal coating is gold, silver or nickel; the first knife-edge structure (10) and the second knife-edge structure (13) use magnesium alloy or stainless steel as the knife-edge material.

4. The remote sample encapsulation isolation device according to claim 1, characterized in that, The sealed tank body (1) is concentrically arranged with the inner seal cover (2) and the outer seal cover (3).

5. The remote sample encapsulation and isolation device according to claim 1, characterized in that, The sealed tank body (1) is fixed on the wall of the remote detector, and a buckle is provided at the bottom end of the side wall of the outer seal cover. The buckle can be firmly locked with the buckle structure on the wall of the remote detector through rotation to realize the fixation of the outer seal cover and the external wall of the remote detector.

6. The remote sample encapsulation isolation device according to claim 1, characterized in that A first packaging bag and a second packaging bag are arranged between the bottom surface of the inner seal cover and the upper surface of the bottom of the sealed tank body. The packaging bag material is polytetrafluoroethylene, and the thickness of the packaging bag is 0.5 - 2 mm; when the sealing is completed, the heating wire at the bottom of the sealed tank body is heated to weld the two packaging bags together to form a sleeve bag seal.

7. The remote sample encapsulation and isolation device according to claim 1, characterized in that The rubber ring (12) is an O-ring with a wire diameter of 2.65 mm, and the rubber ring material is low phenyl silicone rubber G305 compound.

8. The remote sample encapsulation and isolation device according to claim 1, wherein A stepping motor (5) and a driver (6) for controlling the stepping motor are fixedly arranged on the inner top of the outer seal cover (3); the output end of the stepping motor is connected to a screw rod; a screw thread (8) is arranged on the upper surface of the top end of the inner seal cover (2); the screw rod is arranged in the screw thread (8), and the inner seal cover (2) can be pushed to move downward by the rotation of the stepping motor.

9. The remote sample encapsulation and isolation device according to claim 8, characterized in that, The thrust provided by the stepping motor to the inner seal cover is greater than the force required for the second knife-edge structure to squeeze into the indium-silver alloy and less than the force that causes deformation of the inner seal cover, the outer seal cover and the buckle.

10. A remote sample encapsulation and isolation method based on the device described in claim 1, characterized in that, It includes the following steps: 1) After the sample is adjusted in position, the external push rod pushes the double seal cover composed of the inner seal cover (2) and the outer seal cover (3) and the sample, so that the inner seal cover (2) and the sample enter the sealed tank body (1). 2) When the outer seal cover (3) reaches the bulkhead of the far detector, the external push rod controls the double seal cover to rotate so that the buckle on the outer seal cover locks with the buckle structure on the bulkhead, and then the stepping motor on the outer seal cover (3) acts to push the inner seal cover to continue moving into the sealed tank body. 3) During the process of the inner seal cover moving into the sealed tank body, the rubber ring on the inner side of the sealed tank body first contacts the outer conical surface of the inner seal cover, and the rubber ring is compressed and deformed to form a seal. Continuing to move forward, the indium-silver alloy on the peripheral edge of the lower surface of the top end of the inner seal cover (2) is squeezed with the second knife-edge structure at the entrance of the sealed tank body and makes it reach the yield strength for sealing. At the same time, the first knife-edge structure on the outer wall of the seal cover is squeezed with the soft metal wall of the inner wall of the sealed tank body, and the metal coating on the first knife-edge structure is supplemented into the gap to form a double extrusion seal. After the second packaging bag on the lower surface of the inner seal cover contacts the first packaging bag at the bottom of the sealed tank body, the heating wire is powered on to weld the packaging bags together, and finally an excellent sealing effect is obtained through the triple seal structure.

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