Stainless steel liquid nitrogen container

Abstract

The application provides a stainless steel liquid nitrogen container and relates to the technical field of liquid nitrogen containers.The stainless steel liquid nitrogen container comprises a support frame, the inner side of the support frame is fixedly installed with a stainless steel container outer cylinder, and the inner side of the stainless steel container outer cylinder is fixedly installed with a plurality of stainless steel container inner cylinders.A liquid nitrogen container limiting climbing assembly is arranged, the motor can drive the first lead screw to rotate after being started, the first lead screw can drive the lifting climbing ladder to descend through thread cooperation after rotating, the first lead screw can drive the second lead screw to rotate through the transmission gear after rotating, the rotating directions of the second lead screw and the first lead screw are opposite, the second lead screw can drive the liquid nitrogen raw material storage tank lifting platform and the container above to ascend, the stress plate and the sliding rod can be pressed after the lifting climbing ladder descends, the sliding rod can drive the abutting support plate to descend and abut against the ground, the friction between the device and the ground can be increased, and the device will not be displaced when a person climbs.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen container technology, and in particular to a stainless steel liquid nitrogen container. Background Technology

[0002] Liquid nitrogen has a boiling point of -196℃ and is highly volatile at room temperature. The storage of liquid nitrogen places stringent requirements on the material and structure of the container. The extremely low temperature of liquid nitrogen causes most metal materials (such as ordinary carbon steel) to become brittle at low temperatures; the toughness of the material decreases sharply, and it may break even from a slight impact. Stainless steel (such as 304 and 316 grades), containing alloying elements such as chromium and nickel, can maintain good toughness and ductility even at -196℃, and can withstand the low temperature of liquid nitrogen for extended periods, preventing container cracking and leakage.

[0003] Existing large stainless steel liquid nitrogen containers are inconvenient to use because their height makes it difficult for personnel to lift temporary liquid nitrogen storage containers to the top, resulting in inconvenience in adding liquid nitrogen. In some scenarios (such as large laboratories and medical centers), multiple batches of liquid nitrogen need to be stored simultaneously (such as liquid nitrogen corresponding to different samples), requiring the use of multiple separate containers, which occupies a lot of space. Due to the height of large liquid nitrogen storage containers, when adding liquid nitrogen to multiple containers, staff need to climb up and carry temporary storage containers to the top multiple times to perform the filling operation, making the operation inefficient. Therefore, we propose a stainless steel liquid nitrogen container. Utility Model Content

[0004] In view of this, this application provides a stainless steel liquid nitrogen container, which aims to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stainless steel liquid nitrogen container includes a support frame, a stainless steel outer cylinder fixedly installed on the inner side of the support frame, a plurality of stainless steel inner cylinders fixedly installed on the inner side of the stainless steel outer cylinder, glass fiber cotton filling the outer side of the stainless steel inner cylinders, a plurality of casters fixedly installed on the bottom of the support frame, a limit frame fixedly installed on one side of the support frame, and a liquid nitrogen container limit climbing component provided on the support frame and the limit frame.

[0007] The liquid nitrogen container limiting climbing assembly includes a motor, a first lead screw, a guide rod, a signal receiving sensor, a control panel, a climbing fixation ladder, and a lifting climbing ladder. The motor is fixedly installed at the bottom of the limiting frame, the first lead screw is fixedly installed at the output end of the motor, the guide rod is fixedly installed on the inner side of the limiting frame, the signal receiving sensor is fixedly installed on one side of the motor, the control panel is fixedly installed on the support frame, and the signal receiving sensor and the control panel are electrically connected. The climbing fixation ladder is fixedly installed on the front side of the support frame, and the lifting climbing ladder is threaded onto the outer side of the first lead screw and slidably installed on the outer side of the guide rod. The lifting climbing ladder is slidably positioned on the front side of the climbing fixation ladder.

[0008] Preferably, the top and bottom of the stainless steel container outer cylinder are fixedly installed with sealing protective cylinders, and liquid nitrogen raw material inlet and outlet control components are provided on the support frame, the stainless steel container outer cylinder and the sealing protective cylinder.

[0009] Preferably, the liquid nitrogen container limiting climbing assembly further includes a lower pressure plate, a sliding rod, a spring, a force-bearing plate, and an abutment support plate. The lower pressure plate is fixedly installed at the bottom of the lifting climbing ladder, the multiple sliding rods are slidably installed at the bottom of the support frame, the force-bearing plate is fixedly installed at the top of the sliding rod, the abutment support plate is fixedly installed at the bottom of the sliding rod, one end of the spring is fixedly installed at the bottom of the force-bearing plate, and the other end of the spring is fixedly installed at the bottom inner wall of the support frame.

[0010] Preferably, a second lead screw is rotatably mounted on the inner side of the limiting frame, and transmission gears are fixedly mounted on the outer sides of both the second lead screw and the first lead screw, with adjacent transmission gears meshing with each other. A limiting rod is also fixedly mounted on the inner side of the limiting frame, and a liquid nitrogen raw material storage tank lifting platform is slidably mounted on the outer side of the limiting rod. The liquid nitrogen raw material storage tank lifting platform is threaded onto the outer side of the second lead screw.

[0011] Preferably, the liquid nitrogen feedstock inlet / outlet control assembly includes a rotating shaft, a sealing rotating plate, a hinge, a sealing cover plate, a feed threaded outer tube, and a first solenoid valve. The rotating shaft is rotatably mounted inside the glass fiber cotton and the stainless steel container outer cylinder. The sealing rotating plate is fixedly mounted on the top and bottom of the rotating shaft. The hinge is fixedly mounted on one side of the sealing rotating plate. The sealing cover plate is fixedly mounted on one side of the hinge. The feed threaded outer tube is fixedly mounted on the top and bottom of the stainless steel container inner cylinder. The first solenoid valve is fixedly mounted on the outside of the feed threaded outer tube.

[0012] Preferably, the liquid nitrogen raw material inlet and outlet control component further includes an exhaust pipe, a pressure sensor, a second solenoid valve, and a liquid level monitoring sensor. The exhaust pipe and pressure sensor are fixedly installed at the top and bottom of the inner cylinder of the stainless steel container, the second solenoid valve is fixedly installed on the outside of the exhaust pipe, and the liquid level monitoring sensor is fixedly installed on the inner wall of the inner cylinder of the stainless steel container. The pressure sensor, liquid level monitoring sensor, and second solenoid valve are electrically connected to the control panel.

[0013] Preferably, a storage and protective box is fixedly installed at the top and bottom of the support frame, an inlet and outlet pump is fixedly installed inside the storage and protective box, a connecting hose is fixedly installed at the output end and the suction end of the inlet and outlet pump, a rotary joint is rotatably installed on the outside of the connecting hose, and a threaded connecting inner tube is fixedly installed on the outside of the rotary joint.

[0014] Preferably, the limiting frame has guide grooves on its left and right sides, and a partition is fixedly installed in the middle of the inner side of the limiting frame. The lifting ladder and the liquid nitrogen raw material storage tank lifting platform are slidably installed on both sides of the partition and located inside the guide grooves.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) A stainless steel liquid nitrogen container of this utility model, through the liquid nitrogen container limiting climbing component, can drive the first lead screw to rotate after the motor is started. After the first lead screw rotates, it can drive the lifting climbing ladder to descend through the thread engagement. After the first lead screw rotates, it can drive the second lead screw to rotate through the transmission gear. The second lead screw rotates in the opposite direction to the first lead screw, which can drive the liquid nitrogen raw material storage tank lifting platform and the container above to rise. After the lifting climbing ladder descends, it can press the force plate and the slide bar, which can drive the slide bar to drive the abutment support plate to descend and abut against the ground, which can increase the friction between the device and the ground, so that the device will not be displaced when people climb.

[0017] (2) A stainless steel liquid nitrogen container of this utility model, through the liquid nitrogen raw material inlet and outlet control component, opens the sealing cover and opens the storage and protection box, and connects the threaded inner tube to the feed threaded outer tube on the stainless steel container inner cylinder and the temporary storage container. The feed pump can be turned on to extract liquid nitrogen, which can be added to the inside of the stainless steel container inner cylinder. The liquid level monitoring sensor in the stainless steel container inner cylinder can monitor the liquid level to prevent liquid nitrogen from overflowing, and the pressure sensor can monitor the pressure in the stainless steel container inner cylinder. If the pressure is too high, the second solenoid valve can be turned on to perform pressure relief. The middle of the multiple stainless steel container inner cylinders is filled with glass fiber cotton. The glass fiber cotton does not react with the stainless steel outer cylinder and the stainless steel container inner cylinder. The fiber surface is treated to not absorb moisture, so as to avoid water condensing into ice at low temperature and affecting the heat insulation effect.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a stainless steel liquid nitrogen container proposed in this utility model;

[0020] Figure 2 A schematic diagram showing a three-dimensional view of a partial structure of a stainless steel liquid nitrogen container according to an embodiment of this application is provided;

[0021] Figure 3 for Figure 2 A magnified structural diagram of A in the middle;

[0022] Figure 4 A schematic diagram showing a bottom view of a three-dimensional structure of a stainless steel liquid nitrogen container according to an embodiment of this application is provided.

[0023] Figure 5 A schematic diagram showing a three-dimensional view of the explosion section structure of a stainless steel liquid nitrogen container according to an embodiment of this application is provided;

[0024] Figure 6 A schematic diagram showing a three-dimensional cross-sectional view of a stainless steel liquid nitrogen container according to an embodiment of this application is provided.

[0025] Figure 7 for Figure 6 A magnified structural diagram of B in the diagram;

[0026] Figure 8 A schematic diagram showing a three-dimensional view of a portion of the structure of a stainless steel container inner cylinder provided according to an embodiment of this application is shown.

[0027] Figure label:

[0028] 1. Liquid nitrogen container limiting and climbing assembly; 2. Liquid nitrogen raw material inlet and outlet control assembly; 3. Support frame; 4. Stainless steel container outer cylinder; 5. Stainless steel container inner cylinder; 6. Fiberglass wool; 7. Casters; 8. Limiting frame; 9. Sealed protective cylinder;

[0029] 11. Motor; 12. First lead screw; 13. Guide rod; 14. Signal receiving sensor; 15. Control panel; 16. Climbing ladder; 17. Lifting climbing ladder; 18. Lower pressure plate; 19. Slide rod; 20. Spring; 21. Force plate; 22. Abutment support plate; 23. Second lead screw; 24. Transmission gear; 25. Limiting rod; 26. Liquid nitrogen raw material storage tank lifting platform;

[0030] 31. Rotating shaft; 32. Sealing rotating plate; 33. Hinge; 34. Sealing cover plate; 35. Feed threaded outer tube; 36. First solenoid valve; 37. Exhaust pipe; 38. Pressure sensor; 39. Second solenoid valve; 40. Liquid level monitoring sensor; 41. Storage and protection box; 42. Feed and discharge pump; 43. Connecting hose; 44. Rotary joint; 45. Threaded inner tube. Detailed Implementation

[0031] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;

[0032] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] refer to Figure 1-8 A stainless steel liquid nitrogen container includes a support frame 3, a stainless steel container outer cylinder 4 fixedly installed on the inner side of the support frame 3, a plurality of stainless steel container inner cylinders 5 fixedly installed on the inner side of the stainless steel container outer cylinder 4, glass fiber cotton 6 filling the outer side of the stainless steel container inner cylinders 5, a plurality of universal wheels 7 fixedly installed on the bottom of the support frame 3, a limit frame 8 fixedly installed on one side of the support frame 3, and a liquid nitrogen container limit climbing component 1 provided on the support frame 3 and the limit frame 8.

[0034] The liquid nitrogen container limiting climbing assembly 1 includes a motor 11, a first lead screw 12, a guide rod 13, a signal receiving sensor 14, a control panel 15, a climbing ladder 16, and a lifting climbing ladder 17. The motor 11 is fixedly installed at the bottom of the limiting frame 8, the first lead screw 12 is fixedly installed at the output end of the motor 11, the guide rod 13 is fixedly installed on the inner side of the limiting frame 8, the signal receiving sensor 14 is fixedly installed on one side of the motor 11, the control panel 15 is fixedly installed on the support frame 3, and the signal receiving sensor 14 and the control panel 15 are electrically connected. The climbing ladder 16 is fixedly installed on the front side of the support frame 3, and the lifting climbing ladder 17 is threaded on the outside of the first lead screw 12 and slidably installed on the outside of the guide rod 13. The lifting climbing ladder 17 is slidably arranged on the front side of the climbing ladder 16.

[0035] In this embodiment, a sealing protective cylinder 9 is fixedly installed at the top and bottom of the stainless steel container outer cylinder 4, and a liquid nitrogen raw material inlet and outlet control component 2 is provided on the support frame 3, the stainless steel container outer cylinder 4 and the sealing protective cylinder 9.

[0036] In this embodiment, the liquid nitrogen container limiting climbing assembly 1 also includes a lower pressure plate 18, a slide bar 19, a spring 20, a force plate 21, and an abutment support plate 22. The lower pressure plate 18 is fixedly installed at the bottom of the lifting climbing ladder 17. Multiple slide bars 19 are slidably installed at the bottom of the support frame 3. The force plate 21 is fixedly installed at the top of the slide bar 19. The abutment support plate 22 is fixedly installed at the bottom of the slide bar 19. One end of the spring 20 is fixedly installed at the bottom of the force plate 21, and the other end of the spring 20 is fixedly installed on the bottom inner wall of the support frame 3.

[0037] In this embodiment, a second lead screw 23 is rotatably installed on the inner side of the limiting frame 8. Transmission gears 24 are fixedly installed on the outer sides of both the second lead screw 23 and the first lead screw 12. Two adjacent transmission gears 24 mesh with each other. A limiting rod 25 is also fixedly installed on the inner side of the limiting frame 8. A liquid nitrogen raw material storage tank lifting platform 26 is slidably installed on the outer side of the limiting rod 25. The liquid nitrogen raw material storage tank lifting platform 26 is threaded onto the outer side of the second lead screw 23.

[0038] In this embodiment, the liquid nitrogen raw material inlet / outlet control component 2 includes a rotating shaft 31, a sealing rotating plate 32, a hinge 33, a sealing cover 34, a feed threaded outer tube 35, and a first solenoid valve 36. The rotating shaft 31 is rotatably installed inside the glass fiber cotton 6 and the stainless steel container outer cylinder 4. The sealing rotating plate 32 is fixedly installed at the top and bottom of the rotating shaft 31. The hinge 33 is fixedly installed on one side of the sealing rotating plate 32. The sealing cover 34 is fixedly installed on one side of the hinge 33. The feed threaded outer tube 35 is fixedly installed at the top and bottom of the stainless steel container inner cylinder 5. The first solenoid valve 36 is fixedly installed on the outside of the feed threaded outer tube 35. The sealing rotating plate 32 can rotate around the rotating shaft 31, allowing workers to load and unload materials from the stainless steel container inner cylinder 5 at different positions. Closing the sealing cover 34 improves the heat insulation effect of the container.

[0039] In this embodiment, the liquid nitrogen raw material inlet / outlet control component 2 also includes an exhaust pipe 37, a pressure sensor 38, a second solenoid valve 39, and a liquid level monitoring sensor 40. The exhaust pipe 37 and the pressure sensor 38 are fixedly installed at the top and bottom of the stainless steel container inner cylinder 5, respectively. The second solenoid valve 39 is fixedly installed on the outside of the exhaust pipe 37, and the liquid level monitoring sensor 40 is fixedly installed on the inner wall of the stainless steel container inner cylinder 5. The pressure sensor 38, the liquid level monitoring sensor 40, and the second solenoid valve 39 are electrically connected to the control panel 15. The liquid level monitoring sensor 40 can prevent excessive liquid nitrogen added to the stainless steel container inner cylinder 5 from overflowing. The pressure sensor 38 can monitor the gas pressure inside the stainless steel container inner cylinder 5. The second solenoid valve 39 and the exhaust pipe 37 work together to achieve pressure relief.

[0040] In this embodiment, a storage and protective box 41 is fixedly installed on the top and bottom of the support frame 3. An inlet and outlet pump 42 is fixedly installed on the inner side of the storage and protective box 41. A connecting hose 43 is fixedly installed on both the output end and the suction end of the inlet and outlet pump 42. A rotary joint 44 is rotatably installed on the outer side of the connecting hose 43. A threaded connecting inner tube 45 is fixedly installed on the outer side of the rotary joint 44. The rotary joint 44 ensures that the connecting hose 43 will not twist when the threaded connecting inner tube 45 is rotatably connected to the feed threaded outer tube 35. The outside of the connecting hose 43 is provided with heat-insulating glass fiber cotton 6, which can prevent the liquid nitrogen from evaporating during the addition process, and the connecting hose 43 can be stored inside the storage and protective box 41 after the addition is completed.

[0041] In this embodiment, guide grooves are provided on the left and right sides of the limiting frame 8, and a partition is fixedly installed in the middle of the inner side of the limiting frame 8. The lifting ladder 17 and the liquid nitrogen raw material storage tank lifting platform 26 are slidably installed on both sides of the partition and located inside the guide grooves. The guide grooves allow the lifting ladder 17 and the liquid nitrogen raw material storage tank lifting platform 26 to slide relatively stably, and the partitions prevent interference between the lifting ladder 17 and the liquid nitrogen raw material storage tank lifting platform 26 during the sliding process.

[0042] The motor 11, signal receiving sensor 14, control panel 15, first solenoid valve 36, pressure sensor 38, second solenoid valve 39, and feed / discharge pump 42 are all mature and standardized existing technology components in the field of industrial equipment. Their internal structure, working principle, and basic functions have been widely disclosed in the industry and have formed general technical specifications. Therefore, there is no need to repeat them in this utility model patent document.

[0043] Specifically, when liquid nitrogen needs to be added to the inner cylinder 5 of the stainless steel container, the container for temporarily storing liquid nitrogen can be placed on the liquid nitrogen raw material storage tank lifting platform 26. The motor 11 can be controlled via the control panel 15 and the signal receiving sensor 14. After the motor 11 starts, it drives the first lead screw 12 to rotate. The rotation of the first lead screw 12, through its threaded engagement, drives the lifting ladder 17 to descend. Furthermore, the rotation of the first lead screw 12, through the transmission gear 24, drives the second lead screw 23 to rotate. The second lead screw 23 interacts with the first lead screw... The rotation direction of lever 12 is opposite, allowing the second lead screw 23 to lift the liquid nitrogen raw material storage tank lifting platform 26 and the container above it. After descending, the lifting ladder 17 can press the force plate 21 and the slide bar 19, allowing the slide bar 19 to drive the abutment support plate 22 to descend and abut against the ground, increasing the friction between the device and the ground, preventing displacement of the device when personnel are climbing. When adding or removing liquid nitrogen, the sealing cover 34 is opened, and the storage protective box 41 is opened, connecting the threaded inner tube 45 to... The stainless steel inner cylinder 5 and the feed threaded outer tube 35 on the temporary storage container are threadedly connected. Turning on the feed pump 42 allows liquid nitrogen to be drawn and added to the interior of the stainless steel inner cylinder 5. A liquid level monitoring sensor 40 inside the stainless steel inner cylinder 5 monitors the liquid level to prevent overflow, and a pressure sensor 38 monitors the pressure inside the stainless steel inner cylinder 5. If the pressure is too high, a second solenoid valve 39 can be opened to release the pressure. Multiple stainless steel inner cylinders 5 are interspersed with glass fiber cotton 6. The glass fiber cotton 6 does not react with the stainless steel outer cylinder 4 and the stainless steel inner cylinder 5 of the stainless steel container. The fiber surface is treated to prevent moisture absorption, thus avoiding the condensation of water into ice at low temperatures and affecting the insulation effect. The feed threaded outer tube 35 has a symmetrical design, which makes it easy for operators to add or remove liquid nitrogen from the stainless steel inner cylinder 5. The sealing rotating plate 32 can rotate around the rotating shaft 31, allowing operators to operate the stainless steel inner cylinder 5 at different positions. After closing the sealing cover 34, the heat insulation effect of the device can be improved.

[0044] It should be noted that although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel liquid nitrogen container, characterized in that, include: A support frame (3) is provided, on the inner side of which a stainless steel container outer cylinder (4) is fixedly installed. Multiple stainless steel container inner cylinders (5) are fixedly installed on the inner side of the stainless steel container outer cylinder (4). Glass fiber cotton (6) is filled on the outer side of the stainless steel container inner cylinder (5). Multiple casters (7) are fixedly installed at the bottom of the support frame (3). A limit frame (8) is fixedly installed on one side of the support frame (3). A liquid nitrogen container limit climbing assembly (1) is provided on the support frame (3) and the limit frame (8). The liquid nitrogen container limiting climbing assembly (1) includes a motor (11), a first lead screw (12), a guide rod (13), a signal receiving sensor (14), a control panel (15), a climbing ladder (16), and a lifting climbing ladder (17). The motor (11) is fixedly installed at the bottom of the limiting frame (8). The first lead screw (12) is fixedly installed at the output end of the motor (11). The guide rod (13) is fixedly installed on the inner side of the limiting frame (8). The signal receiving sensor (14) is fixedly installed on one side of the motor (11). The control panel (15) is fixedly installed on the support frame (3). The signal receiving sensor (14) and the control panel (15) are electrically connected. The climbing ladder (16) is fixedly installed on the front side of the support frame (3). The lifting climbing ladder (17) is threaded on the outside of the first lead screw (12) and slidably installed on the outside of the guide rod (13). The lifting climbing ladder (17) is slidably arranged on the front side of the climbing ladder (16).

2. A stainless steel liquid nitrogen container according to claim 1, characterized in that, The top and bottom of the stainless steel container outer cylinder (4) are fixedly installed with sealing protective cylinders (9), and liquid nitrogen raw material inlet and outlet control components (2) are provided on the support frame (3), the stainless steel container outer cylinder (4) and the sealing protective cylinder (9).

3. A stainless steel liquid nitrogen container according to claim 1, characterized in that, The liquid nitrogen container limiting climbing assembly (1) also includes a lower pressure plate (18), a slide rod (19), a spring (20), a force plate (21), and an abutment support plate (22). The lower pressure plate (18) is fixedly installed at the bottom of the lifting climbing ladder (17). Multiple slide rods (19) are slidably installed at the bottom of the support frame (3). The force plate (21) is fixedly installed at the top of the slide rod (19). The abutment support plate (22) is fixedly installed at the bottom of the slide rod (19). One end of the spring (20) is fixedly installed at the bottom of the force plate (21), and the other end of the spring (20) is fixedly installed on the bottom inner wall of the support frame (3).

4. A stainless steel liquid nitrogen container according to claim 1, characterized in that, The inner side of the limiting frame (8) is rotatably mounted with a second lead screw (23). The outer sides of the second lead screw (23) and the first lead screw (12) are both fixedly mounted with transmission gears (24). Two adjacent transmission gears (24) mesh with each other. The inner side of the limiting frame (8) is also fixedly mounted with a limiting rod (25). The outer side of the limiting rod (25) is slidably mounted with a liquid nitrogen raw material storage tank lifting platform (26). The liquid nitrogen raw material storage tank lifting platform (26) is threaded onto the outer side of the second lead screw (23).

5. A stainless steel liquid nitrogen container according to claim 2, characterized in that, The liquid nitrogen feedstock inlet / outlet control assembly (2) includes a rotating shaft (31), a sealing rotating plate (32), a hinge (33), a sealing cover plate (34), a feed threaded outer tube (35), and a first solenoid valve (36). The rotating shaft (31) is rotatably installed inside the glass fiber cotton (6) and the stainless steel container outer cylinder (4). The sealing rotating plate (32) is fixedly installed at the top and bottom of the rotating shaft (31). The hinge (33) is fixedly installed on one side of the sealing rotating plate (32). The sealing cover plate (34) is fixedly installed on one side of the hinge (33). The feed threaded outer tube (35) is fixedly installed at the top and bottom of the stainless steel container inner cylinder (5). The first solenoid valve (36) is fixedly installed on the outside of the feed threaded outer tube (35).

6. A stainless steel liquid nitrogen container according to claim 5, characterized in that, The liquid nitrogen raw material inlet and outlet control component (2) also includes an exhaust pipe (37), a pressure sensor (38), a second solenoid valve (39), and a liquid level monitoring sensor (40). The exhaust pipe (37) and the pressure sensor (38) are fixedly installed on the top and bottom of the stainless steel container inner cylinder (5). The second solenoid valve (39) is fixedly installed on the outside of the exhaust pipe (37). The liquid level monitoring sensor (40) is fixedly installed on the inner wall of the stainless steel container inner cylinder (5). The pressure sensor (38), the liquid level monitoring sensor (40), and the second solenoid valve (39) are electrically connected to the control panel (15).

7. A stainless steel liquid nitrogen container according to claim 1, characterized in that, The top and bottom of the support frame (3) are fixedly installed with storage and protection boxes (41). The inner side of the storage and protection box (41) is fixedly installed with a material inlet and outlet pump (42). The output end and suction end of the material inlet and outlet pump (42) are fixedly installed with connecting hoses (43). The outer side of the connecting hose (43) is rotatably installed with a rotary joint (44). The outer side of the rotary joint (44) is fixedly installed with a threaded connecting inner tube (45).

8. A stainless steel liquid nitrogen container according to claim 1, characterized in that, The limiting frame (8) has guide grooves on its left and right sides. A partition is fixedly installed in the middle of the inner side of the limiting frame (8). The lifting ladder (17) and the liquid nitrogen raw material storage tank lifting platform (26) are slidably installed on both sides of the partition and located inside the guide groove.

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