Liquid helium tank protection device and protection method thereof

Abstract

The invention discloses a liquid helium tank protection device and a protection method thereof, and relates to the technical field of liquid helium storage tanks, the liquid helium tank protection device comprises a tank body, a folding shielding piece is arranged on a sleeving ring, and a universal buffering piece connected with the tank body is arranged on the inner side of a connecting clamping ring. By arranging the universal buffer part, when liquid helium in the tank body impacts an inner container of the tank body due to inertia, the tank body pulls a damping spring through a first limiting sleeve and a first spherical block, in this way, the tank body can be buffered, the tank body is protected, an electromagnetic valve is closed by pressing a pressing switch, and the safety of the tank body is improved. In this way, the water solution in the sleeve loses the flowing space, the pressing rod cannot move relative to the sleeve, the tank body is fixed and prevented from shaking in the using process, meanwhile, due to the fact that the discharging head is connected with the sleeving ring through the annular ball shaft, the tank body can be in the vertical state all the time under the action of gravity, and the water solution in the tank body can be discharged. Therefore, convenience is provided for the use of subsequent equipment.

Description

Technical Field

[0001] The invention relates to the technical field of liquid helium storage tanks, and in particular to a liquid helium tank protection device and a protection method thereof. Background Art

[0002] Liquid helium is the liquefied form of helium, which is colorless, transparent, odorless and tasteless. It can achieve ultra-low temperatures of MK level and is one of the most important low-temperature sources. It has the following properties: it will never solidify under normal pressure, has no triple point, and only appears in solid phase when the pressure exceeds 2.5MPa; there is a phase transition phenomenon, and the specific heat and density have sudden changes at the melting point (2.172K); there are superfluidity, creeping film phenomenon and superthermal conductivity, and the viscosity coefficient is close to zero.

[0003] When storing and transporting liquid helium, it needs to be injected into a liquid helium tank. In the process of moving the tank, not only will the tanks collide with each other, but also because the liquid helium tank has an inner liner and an outer shell, in order to prevent the temperature of the liquid helium in the tank from changing, a vacuum chamber will be set between the inner liner and the outer shell. This will cause the inner liner to have a certain amount of space for movement. At this time, when the tank stops being pushed, the liquid helium inside will impact the inner liner due to inertia, which will affect the stability of the connection between the inner liner and the outer shell. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid helium tank protection device and a protection method thereof in order to solve the problem that the liquid helium inside the tank will impact the inner liner due to inertia when the tank body stops being pushed.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquid helium tank protection device, comprising a tank body, a discharge head is installed on the top of the tank body, an annular ball shaft is arranged on the outside of the discharge head, a sleeve ring is sleeved on the outside of the annular ball shaft, a folding shielding member is arranged on the sleeve ring, the sleeve ring is connected to a connecting clamp ring through a multi-directional protective member, a bottom plate is installed on the bottom of the connecting clamp ring, a universal wheel is arranged at the bottom of the bottom plate, and a universal buffer connected to the tank body is arranged on the inner side of the connecting clamp ring.

[0006] As a further solution of the present invention: the folding shielding member includes a U-shaped positioning strut fixedly installed on the outside of the sleeve ring, the bottom end of the U-shaped positioning strut is fixedly connected to the connecting clamp, the outer wall of the sleeve ring is provided with a first limiting guide groove located on both sides of the top of the U-shaped positioning strut, the inner side of the first limiting guide groove is slidably connected with a first slider, the first slider is provided with a U-shaped movable rod, the inner side of the first limiting guide groove is slidably connected with a second slider located on the side of the first slider away from the U-shaped positioning strut, the second slider is provided with a U-shaped splicing rod, the outer wall of the connecting clamp is provided with a second limiting guide groove, arc sleeves are installed on both sides of the U-shaped positioning strut, the interior of the arc sleeve is plugged with an arc extension rod extending to the outside of the arc sleeve, and the end of the arc extension rod away from the arc sleeve is connected to the U-shaped movable rod.

[0007] As a further solution of the present invention: the centers of the arc-shaped sleeve, the arc-shaped extension rod and the sleeve ring coincide with each other, and the centers of the sleeve ring and the connecting clamp ring are coaxial.

[0008] As a further solution of the present invention: the number of the U-shaped movable rod and the U-shaped splicing rod are both provided with two, and the two U-shaped movable rods and the U-shaped splicing rods are symmetrically arranged along the transverse central axis of the sleeve ring, and an arc-shaped sleeve and an arc-shaped extension rod are arranged between the U-shaped positioning strut and the U-shaped movable rod, and between the U-shaped movable rod and the U-shaped splicing rod, and the inner side of the second limiting guide groove is also provided with a first slider and a second slider connected with the U-shaped movable rod and the U-shaped splicing rod.

[0009] As a further solution of the present invention: the universal buffer comprises a plurality of second limiting sleeves installed on the top of the connecting clamp ring, the plurality of second limiting sleeves are equidistantly distributed along the center of the connecting clamp ring, a second spherical block is sleeved on the inner side of the second limiting sleeve, a sleeve is arranged on the top of the second spherical block, a pressure rod extending to the top of the sleeve is inserted in the interior of the sleeve, a first spherical block is installed on the top of the pressure rod, a first limiting sleeve located on the outside of the first spherical block is arranged on the bottom of the tank body, a shock absorbing spring connected to the top of the second spherical block is arranged on the bottom of the first spherical block, the shock absorbing spring is located on the outside of the sleeve, a piston plate located on the inner side of the sleeve is arranged on the bottom end of the pressure rod, a guide groove is opened inside the second spherical block, a water tank is arranged on the inner side of the connecting clamp ring, a solenoid valve is arranged on the top of the water tank, a connecting hose connected to the second spherical block is arranged on the top of the solenoid valve, a battery located between adjacent second limiting sleeves is arranged on the top of the connecting clamp ring, and a press switch located on one side of the battery is installed on the top of the connecting clamp ring.

[0010] As a further solution of the present invention: the battery is electrically connected to the push switch through a wire, and the push switch is electrically connected to the solenoid valve through a wire.

[0011] As a further solution of the present invention: the four sides of the piston plate are in contact with the inner wall of the sleeve, the top of the sleeve is provided with a through hole which is in contact with the pressure rod, and the diameter of the through hole is smaller than the diameter of the piston plate.

[0012] As a further solution of the present invention: the space inside the water tank is larger than the sum of the internal spaces of the multiple sleeves.

[0013] As a further solution of the present invention: a gap is left between the outer wall of the tank body and one side of the U-shaped positioning support rod.

[0014] The present invention also discloses a liquid helium tank protection method, which uses the above-mentioned liquid helium tank protection device and comprises the following steps:

[0015] S1: When the tank is moved, the folding shielding member is first operated to shield the surrounding of the tank to prevent the tank from directly colliding with external objects when it is moved;

[0016] S2: After the tank body is moved to the designated position, the pushing of the sleeve ring is stopped. At this time, the liquid helium inside the tank body will drive the tank body as a whole to swing under the action of inertia, and the tank body will swing relative to the sleeve ring;

[0017] S3: The tank body is buffered by a universal buffer;

[0018] S4: The tank body and the sleeve ring are fixedly connected by operating the universal buffer to prevent the tank body from swinging relative to the sleeve ring when the liquid helium in the tank body is taken out.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting a folding shielding member and pulling the U-shaped splicing rod, the U-shaped positioning support rod, the U-shaped splicing rod, and the U-shaped movable rod are distributed at equal distances along the center of the sleeve ring, and then the U-shaped splicing rods that are in contact with each other are fixedly connected by bolts. In this way, the U-shaped positioning support rod, the U-shaped movable rod, and the U-shaped splicing rod can protect the surrounding of the tank body to prevent the tank body from being damaged due to collisions between tank bodies during transportation. The U-shaped splicing rod can also be swung toward the direction of the U-shaped positioning support rod to make one side of the tank body lose the shielding. At this time, the tank body can be removed for maintenance. In this way, the tank body can be protected without affecting the installation and disassembly of the tank body, further improving the service life of the tank body;

[0021] 2. By setting a universal buffer, when the liquid helium in the tank body collides with the tank liner due to inertia, the tank body pulls the shock-absorbing spring through the first limit sleeve and the first spherical block, so that the tank body can be buffered to protect the tank body. By pressing the push switch to close the solenoid valve, the aqueous solution inside the sleeve loses the flow space, so that the pressure rod cannot move relative to the sleeve, so as to fix the tank body and prevent the tank body from shaking during use. At the same time, because the discharge head is connected to the sleeve ring through the annular ball shaft, the tank body can always be in a vertical state under the action of gravity, which provides convenience for the use of subsequent equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the tank bottom structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection between the sleeve ring and the connecting clamp ring of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection between the water tank and the sleeve of the present invention;

[0026] Figure 5 It is a schematic diagram of the internal structure of the sleeve of the present invention;

[0027] Figure 6 It is a schematic diagram of the connection between the sleeve ring and the U-shaped splicing rod of the present invention;

[0028] Figure 7 It is a schematic diagram of the connection between the U-shaped splicing rod and the U-shaped movable rod of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the connecting clamp ring of the present invention.

[0030] In the figure: 1. tank body; 2. discharge head; 3. bottom plate; 4. universal wheel; 5. annular ball shaft; 6. sleeve ring; 7. first limit guide groove; 8. U-shaped positioning support rod; 9. connecting clamp; 10. U-shaped splicing rod; 11. U-shaped movable rod; 12. arc sleeve; 13. arc extension rod; 14. first limit sleeve; 15. first slider; 16. water tank; 17. second limit sleeve; 18. connecting hose; 19. first spherical block; 20. second spherical block; 21. shock-absorbing spring; 22. sleeve; 23. pressure rod; 24. piston plate; 25. guide groove; 26. second slider; 27. push switch; 28. battery; 29. ​​second limit guide groove; 30. solenoid valve. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0033] See also Figures 1 to 8 In an embodiment of the present invention, a liquid helium tank protection device includes a tank body 1, a discharge head 2 is installed on the top of the tank body 1, an annular ball shaft 5 is arranged on the outside of the discharge head 2, a sleeve ring 6 is sleeved on the outside of the annular ball shaft 5, a folding shielding member is arranged on the sleeve ring 6, the sleeve ring 6 is connected to a connecting clamp ring 9 through a multi-directional protective member, a bottom plate 3 is installed at the bottom of the connecting clamp ring 9, a universal wheel 4 is arranged at the bottom of the bottom plate 3, and a universal buffer connected to the tank body 1 is arranged on the inner side of the connecting clamp ring 9.

[0034] In this embodiment: when the tank body 1 is moved, the folding shielding member is first operated to shield the surrounding of the tank body 1 by the folding shielding member to prevent the tank body 1 from directly colliding with external objects when moving. After the tank body 1 is moved to the specified position, the pushing of the sleeve ring 6 is stopped. At this time, the liquid helium inside the tank body 1 will drive the tank body 1 as a whole to swing under the action of inertia. At this time, the tank body 1 will swing relative to the sleeve ring 6. At this time, the tank body 1 is buffered by the universal buffer member, and then the universal buffer member is operated to achieve a fixed connection between the tank body 1 and the sleeve ring 6 to prevent the tank body 1 from swinging relative to the sleeve ring 6 when the liquid helium inside the tank body 1 is taken out.

[0035] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 The folding shielding member includes a U-shaped positioning strut 8 fixedly installed on the outside of the sleeve ring 6, the bottom end of the U-shaped positioning strut 8 is fixedly connected to the connecting clamp 9, the outer wall of the sleeve ring 6 is provided with a first limiting guide groove 7 located on both sides of the top of the U-shaped positioning strut 8, the inner side of the first limiting guide groove 7 is slidably connected with a first slider 15, the first slider 15 is provided with a U-shaped movable rod 11, the inner side of the first limiting guide groove 7 is slidably connected with a second slider 26 located on the side of the first slider 15 away from the U-shaped positioning strut 8, the second slider 26 is provided with a U-shaped splicing rod 10, the outer wall of the connecting clamp 9 is provided with a second limiting guide groove 29, arc sleeves 12 are installed on both sides of the U-shaped positioning strut 8, the arc sleeve 12 is internally inserted with an arc extension rod 13 extending to the outside of the arc sleeve 12, and the end of the arc extension rod 13 away from the arc sleeve 12 is connected to the U-shaped movable rod 11.

[0036] In this embodiment: when the tank body 1 is transported and moved, the U-shaped splicing rod 10 is pulled first, and the U-shaped splicing rod 10 is rotated along the center of the sleeve ring 6 through the second slider 26. In this process, the U-shaped splicing rod 10 drives the arc extension rod 13 to move, and as the arc extension rod 13 extends out of the arc sleeve 12, the arc extension rod 13 drives the arc sleeve 12 to move synchronously. As the U-shaped splicing rod 10 moves, the arc sleeve 12 drives the U-shaped movable rod 11 to move synchronously, so that the U-shaped positioning support rod 8, the U-shaped splicing rod 10, and the U-shaped movable rod 11 are moved along the sleeve ring 6. The centers of the circles are distributed at equal distances, and then the U-shaped splicing rods 10 that are in contact with each other are fixedly connected by bolts, so that the U-shaped positioning support rods 8, the U-shaped movable rods 11, and the U-shaped splicing rods 10 can protect the surroundings of the tank body 1 to prevent the tank bodies 1 from being damaged due to collisions during transportation. The U-shaped splicing rods 10 can also be swung toward the direction of the U-shaped positioning support rods 8 to make one side of the tank body 1 lose its shielding. At this time, the tank body 1 can be removed for maintenance, so that the tank body 1 can be protected without affecting the installation and disassembly of the tank body 1, thereby further improving the service life of the tank body 1.

[0037] Please refer to Figure 2 , Figure 3 , Figure 6 The centers of the arc-shaped sleeve 12, the arc-shaped extension rod 13, and the sleeve ring 6 coincide with each other, and the sleeve ring 6 is coaxial with the center of the connecting clamp ring 9.

[0038] In this embodiment, by setting this structure, the U-shaped splicing rod 10 can rotate along the sleeve ring 6 when it swings, so that the distance between the U-shaped splicing rod 10 and the U-shaped movable rod 11 and the center of the sleeve ring 6 is always equal.

[0039] Please refer to Figure 2 , Figure 3 , Figure 6 There are two U-shaped movable rods 11 and two U-shaped splicing rods 10, and the two U-shaped movable rods 11 and U-shaped splicing rods 10 are symmetrically arranged along the transverse central axis of the sleeve ring 6. An arc sleeve 12 and an arc extension rod 13 are arranged between the U-shaped positioning support rod 8 and the U-shaped movable rod 11, and between the U-shaped movable rod 11 and the U-shaped splicing rod 10. The inner side of the second limiting guide groove 29 is also provided with a first slider 15 and a second slider 26 connected to the U-shaped movable rod 11 and the U-shaped splicing rod 10.

[0040] In this embodiment: by setting this structure, when the U-shaped splicing rods 10 contact each other, the distance between the U-shaped movable rod 11 and the U-shaped positioning support rod 8 is equal to the distance between the U-shaped movable rod 11 and the U-shaped splicing rod 10, thereby achieving uniform distribution of the U-shaped positioning support rod 8, the U-shaped splicing rod 10, and the U-shaped movable rod 11.

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 The universal buffer comprises a plurality of second limiting sleeves 17 mounted on the top of the connecting clamp ring 9, and the plurality of second limiting sleeves 17 are equidistantly distributed along the center of the connecting clamp ring 9, and a second spherical block 20 is sleeved on the inner side of the second limiting sleeve 17, and a sleeve 22 is arranged on the top of the second spherical block 20, and a pressure rod 23 extending to the top of the sleeve 22 is inserted inside the sleeve 22, and a first spherical block 19 is installed on the top of the pressure rod 23, and a first limiting sleeve 14 located outside the first spherical block 19 is arranged at the bottom of the tank body 1, and a first spherical block 19 is arranged at the bottom with the top of the second spherical block 20. A shock-absorbing spring 21 is connected, and the shock-absorbing spring 21 is located on the outside of the sleeve 22. The bottom end of the pressure rod 23 is provided with a piston plate 24 located on the inside of the sleeve 22. A guide groove 25 is opened inside the second spherical block 20. A water tank 16 is provided on the inner side of the connecting clamp 9. A solenoid valve 30 is installed on the top of the water tank 16. A connecting hose 18 connected to the second spherical block 20 is provided on the top of the solenoid valve 30. A battery 28 located between adjacent second limit sleeves 17 is provided on the top of the connecting clamp 9. A push switch 27 located on one side of the battery 28 is installed on the top of the connecting clamp 9.

[0042] In this embodiment: the bottom plate 3 stops moving, and the liquid helium in the tank body 1 will hit the inner liner of the tank body 1 due to inertia. At this time, the tank body 1 will swing relative to the sleeve ring 6 under the impact force of the liquid helium. At this time, the tank body 1 will pull the shock-absorbing spring 21 through the first limit sleeve 14 and the first spherical block 19, and the pressure rod 23 will retract or extend out of the sleeve 22 due to the swing of the tank body 1, so that the tank body 1 can be buffered, thereby protecting the tank body 1. At the same time, due to the movement of the pressure rod 23 relative to the sleeve 22, the pressure rod 23 will drive the movement of the piston plate 24 to make the aqueous solution inside the water tank 16 pass through the solenoid valve 30 , connecting hose 18, guide groove 25 enters sleeve 22, or the aqueous solution in sleeve 22 enters water tank 16 through guide groove 25, connecting hose 18, solenoid valve 30, and then the solenoid valve 30 is closed by pressing push switch 27, so that the aqueous solution inside sleeve 22 loses flow space, so that pressure rod 23 cannot move relative to sleeve 22, so as to fix tank body 1 and prevent tank body 1 from shaking during use. At the same time, because discharge head 2 is connected with sleeve ring 6 through annular ball shaft 5, tank body 1 can always be in vertical state under the action of gravity, so as to facilitate the use of subsequent equipment.

[0043] Please refer to Figure 8 The battery 28 is electrically connected to the push switch 27 through a wire, and the push switch 27 is electrically connected to the solenoid valve 30 through a wire.

[0044] In this embodiment, this structure is provided to realize the series connection of the battery 28 , the push switch 27 , and the solenoid valve 30 , so that the opening and closing of the solenoid valve 30 can be controlled by pressing the push switch 27 .

[0045] Please refer to Figure 5 The piston plate 24 is fitted around the inner wall of the sleeve 22 , and a through hole is provided on the top of the sleeve 22 to fit with the pressure rod 23 , and the diameter of the through hole is smaller than the diameter of the piston plate 24 .

[0046] In this embodiment, by providing this structure, the piston plate 24 can extract or push the aqueous solution as the pressure rod 23 moves, while also preventing the pressure rod 23 from separating from the sleeve 22 .

[0047] Please refer to Figure 8 , the space inside the water tank 16 is larger than the sum of the internal spaces of the multiple sleeves 22.

[0048] In this embodiment, this structure is provided to prevent the compression rod 23 from being evacuated when extending out of the sleeve 22 , so that the aqueous solution always fills the bottom of the piston plate 24 , the inside of the guide groove 25 , and the inside of the connecting hose 18 .

[0049] Please refer to Figure 1 A gap is left between the outer wall of the tank body 1 and one side of the U-shaped positioning support rod 8.

[0050] In this embodiment: this structure is provided to provide space for the swing of the tank body 1.

[0051] In combination with the above-mentioned liquid helium tank protection device, a liquid helium tank protection method is provided below, which specifically includes the following steps:

[0052] S1: When the tank body 1 is transported and moved, the U-shaped splicing rod 10 is pulled first. At this time, the U-shaped splicing rod 10 rotates along the center of the sleeve ring 6 through the second slider 26. In this process, the U-shaped splicing rod 10 drives the arc extension rod 13 to move. As the arc extension rod 13 extends out of the arc sleeve 12, the arc extension rod 13 drives the arc sleeve 12 to move synchronously. As the U-shaped splicing rod 10 moves, the arc sleeve 12 drives the U-shaped movable rod 11 to move synchronously, so that the U-shaped positioning support rod 8, the U-shaped splicing rod 10, and the U-shaped movable rod 11 are distributed at equal distances along the center of the sleeve ring 6, and then the U-shaped splicing rods 10 that are in contact with each other are fixedly connected by bolts, so that the U-shaped positioning support rod 8, the U-shaped movable rod 11, and the U-shaped splicing rod 10 can protect the surrounding of the tank body 1;

[0053] S2: Then, the tank body 1 is moved by pushing the sleeve ring 6, and the sleeve ring 6 is stopped. At this time, the liquid helium inside the tank body 1 drives the tank body 1 as a whole to swing under the action of inertia, and the tank body 1 swings relative to the sleeve ring 6;

[0054] S3: At this time, the tank body 1 will pull the shock-absorbing spring 21 through the first limiting sleeve 14 and the first spherical block 19, and the pressure rod 23 will retract or extend from the sleeve 22 due to the swing of the tank body 1, so that the tank body 1 can be buffered, thereby protecting the tank body 1. At the same time, due to the movement of the pressure rod 23 relative to the sleeve 22, the pressure rod 23 will drive the movement of the piston plate 24 to allow the aqueous solution inside the water tank 16 to enter the sleeve 22 through the solenoid valve 30, the connecting hose 18, and the guide groove 25, or the aqueous solution in the sleeve 22 enters the water tank 16 through the guide groove 25, the connecting hose 18, and the solenoid valve 30;

[0055] S4: By pressing the push switch 27, the solenoid valve 30 is closed, so that the aqueous solution inside the sleeve 22 loses the flow space, so that the pressure rod 23 cannot move relative to the sleeve 22, so as to fix the tank body 1 to prevent the tank body 1 from shaking during use. At the same time, since the discharge head 2 is connected to the sleeve ring 6 through the annular ball shaft 5, the tank body 1 can always be in a vertical state under the action of gravity, which provides convenience for the use of subsequent equipment.

[0056] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A liquid helium tank protection device, comprising a tank body (1), characterized in that: A discharge head (2) is installed on the top of the tank body (1), an annular ball shaft (5) is arranged on the outer side of the discharge head (2), a sleeve ring (6) is sleeved on the outer side of the annular ball shaft (5), a folding shielding member is arranged on the sleeve ring (6), the sleeve ring (6) is connected to a connecting clamp (9) through a multi-directional protective member, a bottom plate (3) is installed at the bottom of the connecting clamp (9), a universal wheel (4) is arranged at the bottom of the bottom plate (3), and a universal buffer member connected to the tank body (1) is arranged on the inner side of the connecting clamp (9).

2. A liquid helium tank protection device according to claim 1, characterized in that: The folding shielding member comprises a U-shaped positioning support rod (8) fixedly mounted on the outside of the sleeve ring (6), the bottom end of the U-shaped positioning support rod (8) is fixedly connected to the connecting clamp ring (9), the outer wall of the sleeve ring (6) is provided with a first limiting guide groove (7) located on both sides of the top of the U-shaped positioning support rod (8), the inner side of the first limiting guide groove (7) is slidably connected to a first slider (15), the first slider (15) is provided with a U-shaped movable rod (11), the inner side of the first limiting guide groove (7) is slidably connected to a first slider ( 15) a second slider (26) away from one side of the U-shaped positioning support rod (8), a U-shaped splicing rod (10) is arranged on the second slider (26), a second limiting guide groove (29) is opened on the outer wall of the connecting clamp (9), arc sleeves (12) are installed on both sides of the U-shaped positioning support rod (8), an arc extension rod (13) extending to the outside of the arc sleeve (12) is inserted into the interior of the arc sleeve (12), and one end of the arc extension rod (13) away from the arc sleeve (12) is connected to the U-shaped movable rod (11).

3. A liquid helium tank protection device according to claim 2, characterized in that: The centers of the arc-shaped sleeve (12), the arc-shaped extension rod (13) and the sleeve ring (6) coincide with each other, and the centers of the sleeve ring (6) and the connecting clamp ring (9) are coaxial.

4. A liquid helium tank protection device according to claim 2, characterized in that: The number of the U-shaped movable rod (11) and the U-shaped splicing rod (10) is two, and the two U-shaped movable rods (11) and the U-shaped splicing rod (10) are symmetrically arranged along the transverse center axis of the sleeve ring (6). An arc sleeve (12) and an arc extension rod (13) are arranged between the U-shaped positioning support rod (8) and the U-shaped movable rod (11), and between the U-shaped movable rod (11) and the U-shaped splicing rod (10). The inner side of the second limiting guide groove (29) is also provided with a first slider (15) and a second slider (26) connected to the U-shaped movable rod (11) and the U-shaped splicing rod (10).

5. A liquid helium tank protection device according to claim 2, characterized in that: The universal buffer comprises a plurality of second limiting sleeves (17) mounted on the top of the connecting clamp (9), the plurality of second limiting sleeves (17) being distributed at equal distances along the center of the connecting clamp (9), a second spherical block (20) being sleeved on the inner side of the second limiting sleeve (17), a sleeve (22) being arranged on the top of the second spherical block (20), a pressure rod (23) extending to the top of the sleeve (22) being inserted into the interior of the sleeve (22), a first spherical block (19) being mounted on the top of the pressure rod (23), a first limiting sleeve (14) being arranged on the outside of the first spherical block (19) being arranged on the bottom of the tank body (1), a reducing member connected to the top of the second spherical block (20) being arranged on the bottom of the first spherical block (19), and a reducing member (23) being arranged on the bottom of the first spherical block (19) being arranged on the bottom of the first spherical block (19). A shock spring (21), the shock absorbing spring (21) is located on the outside of the sleeve (22), the bottom end of the pressure rod (23) is provided with a piston plate (24) located on the inside of the sleeve (22), the interior of the second spherical block (20) is provided with a guide groove (25), the inner side of the connecting clamp (9) is provided with a water tank (16), the top of the water tank (16) is installed with a solenoid valve (30), the top of the solenoid valve (30) is provided with a connecting hose (18) connected to the second spherical block (20), the top of the connecting clamp (9) is provided with a battery (28) located between adjacent second limiting sleeves (17), and the top of the connecting clamp (9) is provided with a push switch (27) located on one side of the battery (28).

6. A liquid helium tank protection device according to claim 5, characterized in that: The storage battery (28) is electrically connected to the push switch (27) via a wire, and the push switch (27) is electrically connected to the solenoid valve (30) via a wire.

7. A liquid helium tank protection device according to claim 5, characterized in that: The periphery of the piston plate (24) is in contact with the inner wall of the sleeve (22), and the top of the sleeve (22) is provided with a through hole that fits with the pressure rod (23), and the diameter of the through hole is smaller than the diameter of the piston plate (24).

8. A liquid helium tank protection device according to claim 5, characterized in that: The space inside the water tank (16) is larger than the sum of the spaces inside the plurality of sleeves (22).

9. A liquid helium tank protection device according to claim 5, characterized in that: A gap is left between the outer wall of the tank body (1) and one side of the U-shaped positioning support rod (8).

10. A liquid helium tank protection method, characterized in that: The liquid helium tank protection device according to any one of claims 1 to 9 comprises the following steps: S1: When the tank body (1) is moved, the folding shielding member is first operated to shield the surroundings of the tank body (1) by means of the folding shielding member, so as to prevent the tank body (1) from directly colliding with external objects when the tank body (1) is moved; S2: After the tank body (1) is moved to the designated position, the pushing of the positioning ring (6) is stopped. At this time, the liquid helium inside the tank body (1) drives the tank body (1) as a whole to swing under the action of inertia, and the tank body (1) swings relative to the positioning ring (6); S3: Buffering the tank body (1) by using a universal buffer; S4: The tank body (1) and the sleeve ring (6) are fixedly connected by operating the universal buffer member, so as to prevent the tank body (1) from swinging relative to the sleeve ring (6) when the liquid helium inside the tank body (1) is taken out.

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