Liquid nitrogen tank with automatic lifting device

Abstract

The utility model discloses a liquid nitrogen tank with an automatic lifting device, and relates to the field of liquid nitrogen tank auxiliary devices, the liquid nitrogen tank comprises a device bottom plate, a stabilizing mechanism is arranged at the top of a lifting frame, and through the structural arrangement, the liquid nitrogen tank with the automatic lifting device can drive a second connecting rod to move when a rotating disc rotates; a second connecting rod drives a horizontal sliding part to move horizontally, a rotating disc drives a first connecting rod, the first connecting rod pushes a connecting cross rod to move horizontally, an auxiliary sliding part drives a connecting cross plate to rotate, and a supporting pad supports the outer wall of the middle of the liquid nitrogen tank; the liquid nitrogen tank is supported and stabilized from two heights, so that extra stability is provided, particularly in the moving process, the liquid nitrogen tank can be helped to keep stable, vibration or collision caused by inertia can be avoided, the liquid nitrogen tank is prevented from inclining or overturning in the moving process, and the risk of leakage or content damage is reduced.

Description

Technical Field

[0001] The present application relates to the field of liquid nitrogen tank auxiliary devices, and in particular to a liquid nitrogen tank with an automatic lifting device. Background Art

[0002] Liquid nitrogen tanks are containers used to store and transport liquid nitrogen, which remains in liquid form at extremely low temperatures. They are commonly used in laboratories and industrial fields for cooling and cryogenic processing.

[0003] For example, application No. 202211212132.1 discloses a cell liquid nitrogen storage device with an automatic lifting function, including a liquid nitrogen storage tank, a sealing device, a pushing device and a storage device, wherein the sealing device is fixedly mounted on the outer surface of the liquid nitrogen storage tank, the pushing device is fixedly connected to the top outer surface of the liquid nitrogen storage tank, the storage device is evenly slidably inserted inside the top of the liquid nitrogen storage tank, a control panel is fixedly mounted on the upper outer surface of the liquid nitrogen storage tank, a bacteria storage port is provided at the center of the top surface of the liquid nitrogen storage tank, and a connecting groove is provided on the outer surface of the top edge of the liquid nitrogen storage tank. However, the following deficiencies still exist in actual use:

[0004] When the cell liquid nitrogen storage device with automatic lifting function of the above-mentioned patent is actually used, when it moves horizontally, the main body of the storage device will swing horizontally, causing the cell liquid nitrogen inside to tilt and shake. The sealing device fixedly installed on the outer wall of the liquid nitrogen storage tank cannot stabilize the entire liquid nitrogen storage tank. Utility Model Content

[0005] In order to improve the shaking problem during movement, the present application provides a liquid nitrogen tank with an automatic lifting device.

[0006] The present application provides a liquid nitrogen tank with an automatic lifting device adopts the following technical solution:

[0007] A liquid nitrogen tank with an automatic lifting device comprises a device bottom plate, a side wall of the device bottom plate is fixedly connected to an L plate, a universal wheel is rotatably connected to the bottom of the device bottom plate, a cylinder is fixedly connected to the top of the device bottom plate, a lifting frame that fits the inner wall of the L plate is fixedly connected to the telescopic end of the cylinder, and a stabilizing mechanism is arranged on the top of the lifting frame;

[0008] The stability mechanism includes a rotating disc rotatably arranged in the middle of the lifting frame. At the top of the rotating disc, a first connecting rod and a second connecting rod are rotatably arranged. At the top of the end of the second connecting rod away from the rotating disc, a limiting block is slidably arranged. At the top of the limiting block, a limiting plate is fixedly connected. Between the two limiting plates, a horizontal sliding member is slidably arranged. On the side wall of the horizontal sliding member, an arc-shaped member is fixedly arranged. At the top of the side of the first connecting rod away from the rotating disc, a rotating member is rotatably arranged. On one side of the rotating member, a connecting cross plate is slidably arranged. On the side of the connecting cross plate away from the rotating member, a support pad is fixedly connected.

[0009] By adopting the above technical solution, both the first connecting rod and the second connecting rod are centrosymmetrically arranged, so that the stability of the liquid nitrogen tank is more uniform.

[0010] Preferably, the stability mechanism further includes a motor fixedly connected to the inner bottom of the lifting frame. The output shaft end of the motor is fixedly connected to the bottom of the rotating disc. At the top of the rotating disc, a first fixed shaft is fixedly connected. The side wall of the first fixed shaft is movably penetrated by the first connecting rod, and the side wall of the first fixed shaft is movably penetrated by the second connecting rod. At the top of the end of the second connecting rod away from the rotating disc, a rotating column is movably penetrated.

[0011] By adopting the above technical solution, the motor can drive the rotating disc to rotate around the output shaft of the motor, so that the structure operates more reasonably.

[0012] Preferably, a limiting circular plate is fixedly connected to the bottom of the rotating column. The top of the rotating column is fixedly connected to the bottom of the horizontal sliding member. The side wall of the rotating column is movably penetrated by the top of the limiting block. The side wall of the limiting block is fixedly connected to one side of the lifting frame close to the limiting block. A carrying disc is fixedly connected to the side wall of the limiting block. A liquid nitrogen tank is arranged on the top of the carrying disc. A guiding member is fixedly connected to the side wall of the horizontal sliding member.

[0013] By adopting the above technical solution, there are multiple limiting blocks centrosymmetric with respect to the output shaft end of the motor, so as to support the liquid nitrogen tank from multiple faces, thereby dispersing the supporting force and avoiding excessive local stress.

[0014] Preferably, a spring is fixedly connected to the side of the horizontal sliding member close to the guiding member. A sliding block movably penetrating the side wall of the limiting plate is fixedly connected to the side wall of the horizontal sliding member. One end of the spring away from the horizontal sliding member is fixedly connected to a sliding plate slidably connected to the inner wall of the guiding member. A connecting plate is fixedly connected to the side of the sliding plate away from the spring.

[0015] By adopting the above technical solution, through the sliding block, the bottom of the horizontal sliding member and the top of the limiting block are always kept in a fitting state, making the structure more stable.

[0016] Preferably, one end of the connecting plate away from the sliding plate is fixedly connected to one end of the arc-shaped member close to the connecting plate. The top of one end of the first connecting rod away from the first fixed shaft is fixedly connected to a second fixed shaft, and the side wall of the second fixed shaft movably penetrates through the top of the rotating member.

[0017] By adopting the above technical solution, the arc-shaped member is integrally arranged in an arc shape, so as to better fit the side wall of the liquid nitrogen tank body, making the local stress more dispersed and avoiding damage to the side wall of the liquid nitrogen tank body.

[0018] Preferably, a connecting block is fixedly connected to the side wall of the rotating member, a connecting cross bar is fixedly connected to the side wall of the connecting block, and an auxiliary sliding member movably penetrates through the side wall of the connecting cross bar.

[0019] By adopting the above technical solution, through the chute on the side wall of the auxiliary sliding member, the horizontal movement of the connecting cross bar can drive the auxiliary sliding member to rotate, making the structure operate more reasonably.

[0020] Preferably, a vertical limiting piece is fixedly connected to one end of the connecting cross bar away from the connecting block, and a connecting cross plate is fixedly connected to one end of the auxiliary sliding member away from the connecting cross bar.

[0021] By adopting the above technical solution, the side area of the vertical limiting piece is larger than the chute on the side wall of the auxiliary sliding member, so that the connecting cross bar is always located in the chute of the auxiliary sliding member.

[0022] Preferably, a rotating shaft fixedly penetrates through the side wall of the connecting cross plate, a connecting frame fixedly connected to the side wall of the carrying plate movably penetrates through the side wall of the rotating shaft, and one side of the connecting frame away from the carrying plate is fixedly connected to the inner wall of the lifting frame.

[0023] By adopting the above technical solution, the rotating shaft is located on the side of the connecting cross plate close to the connecting cross bar, so that a small rotation of the auxiliary sliding member can drive the support pad to rotate in a large range, simplifying the operation mode of the structure.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When the rotating disk rotates, it drives the second connecting rod to move, thereby driving the horizontal sliding member to move horizontally through the second connecting rod, so that the spring is compressed, and the arc-shaped member clamps the side wall of the liquid nitrogen tank body, thereby performing preliminary support. Then, the rotating disk drives the first connecting rod, so that the first connecting rod pushes the connecting cross bar to move horizontally, thereby driving the connecting cross plate to rotate through the auxiliary sliding member, so that the supporting pad supports the outer wall of the middle part of the liquid nitrogen tank body, so as to support and stabilize the liquid nitrogen tank body from two heights, thereby providing additional stability. Especially during the movement process, it can help the liquid nitrogen tank body to remain stable, and can also avoid vibrations or collisions caused by inertia, prevent the liquid nitrogen tank body from tilting or overturning during the movement process, thereby reducing the risk of leakage or damage to the contents. Brief Description of the Drawings

[0026] Figure 1 This is an overall structure display diagram of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0027] Figure 2 This is a partial display diagram of another perspective of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0028] Figure 3 This is a partial display diagram of the first fixed shaft of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0029] Figure 4 This is a partial cross-sectional view of the rotating column of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0030] Figure 5 This is a partial display diagram of the spring of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0031] Figure 6 This is a partial display diagram of the connecting cross plate of the liquid nitrogen tank with an automatic lifting device according to the present application;

[0032] Figure 7 This is a partial display diagram of the auxiliary sliding member of the liquid nitrogen tank with an automatic lifting device according to the present application.

[0033] Reference Signs:

[0034] 1. Device bottom plate; 11. L-shaped plate; 12. Universal wheel; 13. Cylinder; 14. Lifting frame;

[0035] 2. Stabilizing mechanism; 21. Motor; 22. Rotating disk; 23. First fixed shaft; 24. First connecting rod; 25. Second connecting rod; 26. Rotating column; 27. Limiting circular plate; 28. Horizontal sliding member; 29. Limiting block; 210. Limiting plate; 211. Loading disk; 212. Guide member; 213. Spring; 214. Sliding plate; 215. Connecting plate; 216. Arc-shaped member; 217. Sliding block;

[0036] 218. The second fixed shaft; 219. The rotating member; 220. The connecting block; 221. The connecting cross bar; 222. The auxiliary sliding member; 223. The vertical limiting piece; 224. The connecting cross plate; 225. The supporting pad; 226. The rotating shaft; 227. The connecting frame.

[0037] 3. The liquid nitrogen tank body. Specific implementation manners

[0038] The following will further elaborate on this application in conjunction with the attached Figures 1-7 for a more detailed description.

[0039] The embodiment of this application discloses a liquid nitrogen tank with an automatic lifting device.

[0040] Referring to Figure 1 and Figure 2 , a liquid nitrogen tank with an automatic lifting device includes a device bottom plate 1. An L-shaped plate 11 is fixedly connected to the side wall of the device bottom plate 1 for limit guiding. Universal wheels 12 are rotatably connected to the bottom of the device bottom plate 1 for moving the device. The bottom of a cylinder 13 is fixedly connected to the top of the device bottom plate 1 for vertical lifting. The telescopic end of the cylinder 13 is fixedly connected to the bottom of a lifting frame 14 for driving the lifting frame 14 to lift synchronously. The side walls at the four corners of the lifting frame 14 are in contact with the inner wall of the L-shaped plate 11, so as to limit the lifting frame 14 through the L-shaped plate 11. A stabilizing mechanism 2 is provided at the top of the lifting frame 14.

[0041] The staff places the liquid nitrogen tank body 3 on the top of a carrying tray 211, and then controls the cylinder 13 to perform vertical lifting.

[0042] Referring to Figure 3 and Figure 4, the stabilizing mechanism 2 includes a rotating disk 22 rotatably arranged in the middle of the lifting frame 14. The first connecting rod 24 and the second connecting rod 25 are both rotatably arranged on the top of the rotating disk 22, so as to drive the first connecting rod 24 and the second connecting rod 25 to move through the rotating disk 22. The limiting block 29 is slidably arranged on the top of the end of the second connecting rod 25 far from the rotating disk 22, and the limiting plate 210 is fixedly connected to the top of the limiting block 29, so as to guide the movement direction through the limiting plate 210. The horizontal sliding member 28 is slidably arranged between the two limiting plates 210, and the arc-shaped member 216 is fixedly arranged on the side wall of the horizontal sliding member 28, so as to drive the arc-shaped member 216 to move horizontally through the horizontal sliding member 28. The rotating member 219 is rotatably arranged on the top of the side of the first connecting rod 24 far from the rotating disk 22, and the connecting cross plate 224 is slidably arranged on one side of the rotating member 219, so as to drive the connecting cross plate 224 to move through the rotating member 219. The supporting pad 225 is fixedly connected to the side of the connecting cross plate 224 far from the rotating member 219, so that the connecting cross plate 224 can drive the supporting pad 225 to rotate synchronously. The stabilizing mechanism 2 further includes a motor 21 fixedly connected to the inner bottom of the lifting frame 14 for driving the operation of the mechanism. The bottom of the rotating disk 22 is fixedly connected to the output shaft end of the motor 21, so that the rotating disk 22 can be driven to rotate through the motor 21.

[0043] Subsequently, the staff starts the motor 21, and the motor 21 will drive the rotating disk 22 to rotate slightly. When the rotating disk 22 rotates, it will drive the second connecting rod 25 to move. As the rotating disk 22 rotates, the second connecting rod 25 will pull the rotating column 26 to move horizontally towards the rotating disk 22. The rotating column 26 will drive the horizontal sliding member 28 to move horizontally towards the rotating disk 22. The horizontal sliding member 28 will drive the guiding member 212 and the spring 213 to move horizontally synchronously. The spring 213 will drive the sliding plate 214 to move horizontally synchronously. The sliding plate 214 will drive the arc-shaped member 216 to approach the bottom side wall of the liquid nitrogen tank 3 through the connecting plate 215. Subsequently, the arc-shaped member 216 will fit the bottom of the liquid nitrogen tank 3.

[0044] Refer to Figure 4 , Figure 5, the first fixed shaft 23 is fixedly connected to the top of the rotating disk 22. A circular hole one is formed through the top of the first connecting rod 24. The side wall of the first fixed shaft 23 is movably penetrated through the circular hole one, so that the first connecting rod 24 is rotatably connected to the first fixed shaft 23. A circular hole two is formed through the top of the second connecting rod 25. The side wall of the first fixed shaft 23 is movably penetrated through the circular hole two, so that the first fixed shaft 23 is rotatably connected to the second connecting rod 25. A circular hole three is formed through the top of the end of the second connecting rod 25 away from the rotating disk 22. The rotating column 26 is movably penetrated through the circular hole three, so that the rotating column 26 is rotatably connected to the second connecting rod 25. The top of the limiting circular plate 27 is fixedly connected to the bottom of the rotating column 26, so as to limit the second connecting rod 25 and prevent the second connecting rod 25 from falling downward. The end of the rotating column 26 away from the limiting circular plate 27 is fixedly connected to the side of the horizontal sliding member 28 close to the rotating column 26. The horizontal sliding member 28 is in close contact with the top of the limiting block 29, so as to limit the rotating column 26 through the horizontal sliding member 28. A horizontal sliding groove one is formed through the top of the limiting block 29. The side wall of the rotating column 26 is movably penetrated through the sliding groove one, so that the rotating column 26 is slidably connected to the limiting block 29.

[0045] As the horizontal sliding member 28 continues to move, at this time, the sliding plate 214 is fixed by the arc-shaped member 216, so that the sliding plate 214 slides inside the guiding member 212, and the spring 213 will be compressed.

[0046] Refer to Figure 5 , Figure 6 , the outer wall of the limiting block 29 is fixedly connected to the side of the lifting frame 14 close to the limiting block 29, so as to fix the limiting block 29 through the lifting frame 14. The side of the limiting block 29 away from the rotating column 26 is fixedly connected to the outer wall of the carrying disk 211. A groove is formed in the top of the carrying disk 211. The bottom of the liquid nitrogen tank body 3 is clamped with the groove. The side of the horizontal sliding member 28 close to the guiding member 212 is fixedly connected to the side wall of the guiding member 212. The middle of the side of the horizontal sliding member 28 close to the guiding member 212 is fixedly connected to one end of the spring 213 close to the horizontal sliding member 28, so that when the horizontal sliding member 28 moves horizontally, it can drive the guiding member 212 and the spring 213 to move horizontally synchronously. The side wall of the horizontal sliding member 28 is fixedly connected to one end of the sliding block 217 close to the horizontal sliding member 28. A sliding groove two is formed through the side wall of the limiting plate 210. The sliding block 217 is movably penetrated through the sliding groove two, so that the sliding block 217 is slidably connected to the limiting plate 210. One end of the spring 213 away from the horizontal sliding member 28 is fixedly connected to one end of the sliding plate 214 close to the spring 213. The outer wall of the sliding plate 214 is slidably connected to the inner wall of the guiding member 212, so that when the spring 213 contracts, it will assist the horizontal movement of the sliding plate 214.

[0047] The spring 213 will apply a horizontal thrust to the sliding plate 214, thereby clamping and fixing the bottom side wall of the liquid nitrogen tank body 3, so as to reduce the shaking probability of the liquid nitrogen tank body 3 during movement. When the motor 21 drives the rotating disk 22 to rotate slightly, the rotating disk 22 will also drive the first connecting rod 24 to move, and the first connecting rod 24 will drive the rotating member 219 to move away from the rotating disk 22.

[0048] Refer to Figure 6 、 Figure 7 The connecting plate 215 is fixedly connected to the side of the sliding plate 214 away from the spring 213. One end of the arc-shaped member 216 close to the connecting plate 215 is fixedly connected to the end of the connecting plate 215 away from the sliding plate 214, so that the sliding plate 214 is fixedly connected to the arc-shaped member 216 through the connecting plate 215. The second fixed shaft 218 is fixedly connected to the top of the end of the first connecting rod 24 away from the first fixed shaft 23. A circular hole four is formed through the top of the rotating member 219, and the side wall of the second fixed shaft 218 movably penetrates through the circular hole four, so that the rotating member 219 is rotatably connected to the second fixed shaft 218. The connecting block 220 is fixedly connected to the side wall of the rotating member 219, and the connecting cross bar 221 is fixedly connected to the side wall of the connecting block 220, so that the rotating member 219 is fixedly connected to the connecting cross bar 221 through the connecting block 220. A chute three is formed through the side wall of the auxiliary sliding member 222, and the side wall of the connecting cross bar 221 movably penetrates through the chute three, so that the auxiliary sliding member 222 is slidably connected to the connecting cross bar 221. One side of the vertical limiting piece 223 close to the connecting cross bar 221 is fixedly connected to the end of the connecting cross bar 221 away from the connecting block 220, so as to limit the connecting cross bar 221 through the vertical limiting piece 223, so that the connecting cross bar 221 and the auxiliary sliding member 222 are always in a sliding connection state.

[0049] The rotating member 219 will drive the connecting cross bar 221 to move horizontally synchronously through the connecting block 220, and the connecting cross bar 221 will slide inside the auxiliary sliding member 222, so that the connecting cross bar 221 drives the connecting cross plate 224 to rotate through the auxiliary sliding member 222.

[0050] Refer to Figure 6 、 Figure 7 The connecting cross plate 224 is fixedly connected to the end of the auxiliary sliding member 222 away from the connecting cross bar 221. A circular hole five is formed through the side wall of the connecting cross plate 224, and the rotating shaft 226 is fixedly penetrated through the circular hole five, so that the rotating shaft 226 is fixedly connected to the connecting cross plate 224. A circular hole six is formed through the side wall of the connecting frame 227, and the side wall of the rotating shaft 226 movably penetrates through the circular hole six, so that the rotating shaft 226 is rotatably connected to the connecting frame 227. One side of the connecting frame 227 close to the carrying disk 211 is fixedly connected to the side wall of the carrying disk 211. The inner wall of the lifting frame 14 is fixedly connected to the side of the connecting frame 227 away from the carrying disk 211.

[0051] The connecting cross plate 224 will drive the support pad 225 to rotate towards one side of the liquid nitrogen tank body 3, so that the support pad 225 fits against the middle side wall of the liquid nitrogen tank body 3, thereby further supporting the outer wall of the liquid nitrogen tank body 3, further reducing the shaking of the liquid nitrogen tank body 3 during movement, and improving stability.

[0052] Among them, the cylinder 13 and the motor 21 are both prior arts, and their structural principles will not be elaborated here. There also include power connection lines, power switches, etc., which are not the main technologies and will not be elaborated here.

[0053] The implementation principle of a liquid nitrogen tank with an automatic lifting device in an embodiment of the present application is as follows:

[0054] The staff starts the motor 21, and the motor 21 will drive the second connecting rod 25 to move. As the rotating disk 22 rotates, the second connecting rod 25 will pull the rotating column 26 to move horizontally towards the rotating disk 22. The rotating column 26 will drive the arc-shaped member 216 to approach the bottom side wall of the liquid nitrogen tank body 3. Subsequently, the arc-shaped member 216 will fit against the bottom of the liquid nitrogen tank body 3. As the horizontal sliding member 28 continues to move, the sliding plate 214 slides inside the guiding member 212, and the spring 213 will apply a horizontal thrust to the sliding plate 214, thereby clamping and fixing the bottom side wall of the liquid nitrogen tank body 3. The rotating disk 22 will also drive the first connecting rod 24 to move, and the first connecting rod 24 will drive the rotating member 219 to move away from the rotating disk 22. The rotating member 219 will drive the connecting cross bar 221 to slide inside the auxiliary sliding member 222 through the connecting block 220, so that the connecting cross bar 221 drives the connecting cross plate 224 to rotate. The connecting cross plate 224 will drive the support pad 225 to rotate towards one side of the liquid nitrogen tank body 3, so that the support pad 225 fits against the middle side wall of the liquid nitrogen tank body 3, thereby further supporting the outer wall of the liquid nitrogen tank body 3.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A liquid nitrogen tank with an automatic lifting device, comprising a device bottom plate (1), a side wall of the device bottom plate (1) is fixedly connected to an L plate (11), a bottom of the device bottom plate (1) is rotatably connected to a universal wheel (12), a top of the device bottom plate (1) is fixedly connected to a cylinder (13), and a telescopic end of the cylinder (13) is fixedly connected to a lifting frame (14) that is in contact with the inner wall of the L plate (11), characterized in that: A stabilizing mechanism (2) is provided on the top of the lifting frame (14); The stabilizing mechanism (2) comprises a rotating disk (22) rotatably arranged in the middle of the lifting frame (14); a first connecting rod (24) and a second connecting rod (25) are rotatably arranged on the top of the rotating disk (22); a limiting block (29) is slidably arranged on the top of one end of the second connecting rod (25) away from the rotating disk (22); a limiting plate (210) is fixedly connected to the top of the limiting block (29); a horizontal sliding member (28) is slidably arranged between the two limiting plates (210); an arc-shaped member (216) is fixedly arranged on the side wall of the horizontal sliding member (28); a rotating member (219) is rotatably arranged on the top of the side of the first connecting rod (24) away from the rotating disk (22); a connecting cross plate (224) is slidably arranged on one side of the rotating member (219); a supporting pad (225) is fixedly connected to the side of the connecting cross plate (224) away from the rotating member (219).

2. The liquid nitrogen tank with an automatic lifting device according to claim 1, characterized in that: The stabilizing mechanism (2) also includes a motor (21) fixedly connected to the bottom of the lifting frame (14), the output shaft end of the motor (21) is fixedly connected to the bottom of the rotating disk (22), the top of the rotating disk (22) is fixedly connected to a first fixed shaft (23), the side wall of the first fixed shaft (23) is movably penetrated by a first connecting rod (24), the side wall of the first fixed shaft (23) is movably penetrated by a second connecting rod (25), and the top of the second connecting rod (25) away from the rotating disk (22) is movably penetrated by a rotating column (26).

3. The liquid nitrogen tank with an automatic lifting device according to claim 2, characterized in that: The bottom of the rotating column (26) is fixedly connected to a limiting disc (27), the top of the rotating column (26) is fixedly connected to the bottom of the horizontal sliding member (28), the side wall of the rotating column (26) and the top of the limiting block (29) are movably connected, the side wall of the limiting block (29) is fixedly connected to a side of the lifting frame (14) close to the limiting block (29), the side wall of the limiting block (29) is fixedly connected to a carrying plate (211), the top of the carrying plate (211) is provided with a liquid nitrogen tank body (3), and the side wall of the horizontal sliding member (28) is fixedly connected to a guide member (212).

4. The liquid nitrogen tank with an automatic lifting device according to claim 3, characterized in that: A spring (213) is fixedly connected to one side of the horizontal sliding member (28) close to the guide member (212); a sliding block (217) movably penetrating the side wall of the limit plate (210) is fixedly connected to the side wall of the horizontal sliding member (28); an end of the spring (213) away from the horizontal sliding member (28) is fixedly connected to a sliding plate (214) slidably connected to the inner wall of the guide member (212); and a connecting plate (215) is fixedly connected to one side of the sliding plate (214) away from the spring (213).

5. The liquid nitrogen tank with an automatic lifting device according to claim 4, characterized in that: One end of the connecting plate (215) away from the sliding plate (214) is fixedly connected to one end of the arc-shaped member (216) close to the connecting plate (215); the top of one end of the first connecting rod (24) away from the first fixed shaft (23) is fixedly connected to the second fixed shaft (218); the side wall of the second fixed shaft (218) and the top of the rotating member (219) are movably connected.

6. The liquid nitrogen tank with an automatic lifting device according to claim 5, characterized in that: The side wall of the rotating member (219) is fixedly connected to a connecting block (220), the side wall of the connecting block (220) is fixedly connected to a connecting cross bar (221), and the side wall of the connecting cross bar (221) is movably penetrated by an auxiliary sliding member (222).

7. The liquid nitrogen tank with an automatic lifting device according to claim 6, characterized in that: One end of the connecting cross bar (221) away from the connecting block (220) is fixedly connected to a vertical limit plate (223), and one end of the auxiliary sliding member (222) away from the connecting cross bar (221) is fixedly connected to a connecting cross plate (224).

8. The liquid nitrogen tank with an automatic lifting device according to claim 7, characterized in that: A rotating shaft (226) is fixedly passed through the side wall of the connecting transverse plate (224), and a connecting frame (227) fixedly connected to the side wall of the carrying plate (211) is movably passed through the side wall of the rotating shaft (226), and the connecting frame (227) is fixedly connected to the inner wall of the lifting frame (14) at a side away from the carrying plate (211).

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