A heat-conducting fin and a cryogenic storage tank

Abstract

The present invention provides a heat-conducting fin and a cryogenic storage tank, relating to the technical field of heat exchange components. The heat-conducting fin comprises a support, a main heat pipe is swingably arranged on the support, a plurality of auxiliary heat pipes are uniformly arranged on the main heat pipe and are communicated with each other, fins are uniformly arranged on the auxiliary heat pipes, a first universal ball is rotatably arranged on the support, the main heat pipe is connected with the first universal ball, and an elastic driving mechanism is arranged in the support to elastically swing the main heat pipe. The cryogenic storage tank comprises a plurality of heat-conducting units arranged axially on the cryogenic storage tank. The heat-conducting unit comprises a heat-conducting ring whose shape is adapted to the inner wall of the cryogenic storage tank, the outer edge of the heat-conducting ring is connected with the inner wall of the cryogenic storage tank, a plurality of heat-conducting fins are arranged on the inner edge of the heat-conducting ring, and the support of the heat-conducting fin is connected to the inner edge of the heat-conducting ring. The present invention makes the temperature of the liquid medium uniform through heat conduction, and avoids potential safety hazards of the storage tank caused by the temperature rise and gasification of local liquid medium due to poor heat conduction.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange components, and particularly relates to a heat conducting fin and a cryogenic storage tank. Background Art

[0002] A cryogenic storage tank is a device specifically designed to store cryogenic liquids (such as liquid nitrogen, liquid oxygen, liquid argon, and liquid helium, etc.). These storage tanks have excellent heat insulation performance and can effectively maintain the low temperature state of the internal liquid.

[0003] The latent heat of vaporization of liquid helium is relatively small compared to oxygen, nitrogen, and argon media. It is easily vaporized by absorbing heat. After the liquid is vaporized, the gas in the tank increases, which may cause overpressure damage to the tank body. According to the physical properties of liquid helium medium, the thermal conductivity of gas is much larger than that of liquid. Therefore, when the tank is full of liquid, due to the slow heat conduction of the liquid, the temperature of the liquid around the tank body is higher than that of the liquid in the middle of the tank body. Continuous heat transfer causes the liquid around the tank body to be quickly vaporized into gas, posing a safety hazard to the tank body. Summary of the Invention

[0004] The purpose of the present invention is to develop a heat conducting fin and a cryogenic storage tank that can make the temperature of the liquid medium uniform through heat conduction, and avoid potential safety hazards of the storage tank caused by the temperature rise and vaporization of local liquid medium due to poor heat conduction.

[0005] The present invention is realized through the following technical solutions:

[0006] A heat conducting fin, comprising:

[0007] A support;

[0008] A main heat pipe, swingably arranged on the support;

[0009] A plurality of sub heat pipes, uniformly arranged on the main heat pipe and communicating with each other;

[0010] Fins, uniformly arranged on the sub heat pipes;

[0011] Wherein, a first universal ball is rotatably arranged on the support, the main heat pipe is connected to the first universal ball, and an elastic driving mechanism is arranged inside the support to elastically swing the main heat pipe.

[0012] Optionally, the end of the main heat pipe away from the support is an open end, the end of the main heat pipe close to the support is a closed end, a support rod is coaxially connected to the closed end of the main heat pipe, and the support rod is coaxially connected to the first universal ball;

[0013] At least one set of holes is opened on the main heat pipe on the side of the closed end. Multiple sets of holes are arranged at equal intervals in the axial direction of the main heat pipe. Each set of holes includes a plurality of pipe holes opened at equal intervals in the circumferential direction of the main heat pipe.

[0014] Optionally, a frustum-shaped swing groove with the larger diameter end facing the main heat pipe is formed on the side of the support near the main heat pipe, and the first universal ball is rollably arranged in the support at the bottom of the swing groove;

[0015] A ring-shaped diaphragm is arranged in the swing groove, the outer edge of the diaphragm is connected to the inner wall of the swing groove, and the inner edge of the diaphragm is connected to the inner wall of the support rod.

[0016] Optionally, the elastic driving mechanism includes an elastic groove formed in the support inside the first universal ball, an expansion rod coaxially connected to the first universal ball is arranged in the elastic groove, and an elastic component cooperating with the end of the expansion rod is arranged in the elastic groove.

[0017] Optionally, a flat driving box is arranged in the elastic groove, a circular swing hole coaxial with the first universal ball is formed on the side of the driving box close to the first universal ball, a cylindrical driving block is slidably arranged in the driving box, a ball seat connected to the center of the driving block is arranged in the swing hole, a second universal ball is rollably arranged on the ball seat, the expansion rod is coaxially connected to the second universal ball, and the elastic component is arranged in the driving box and cooperates with the driving block.

[0018] Optionally, the elastic component includes a regular hexagon-shaped elastic enclosure, the enclosure surrounds the driving block and is coaxial with the swing hole, and collar rings are sleeved on three of the sides of the enclosure, where:

[0019] Only one of two adjacent sides of the enclosure is sleeved with a collar ring, a pull rope is connected between the collar ring and the driving block, and the connection points of the three pull ropes on the driving block are spaced 120 degrees in the circumferential direction of the driving block.

[0020] Optionally, the enclosure includes six rotating seats, the six rotating seats are respectively located at the six corners of the regular hexagon-shaped enclosure, the rotating seats are rotatably connected to the driving box, the rotation axes of the rotating seats are parallel to the axial direction of the driving block, an elastic block is arranged between two adjacent rotating seats, the elastic block is strip-shaped, both ends of the elastic block are inserted into the two rotating seats respectively, the elastic block is composed of multiple closely arranged elastic sheets, and the collar ring is sleeved on the corresponding elastic block.

[0021] A cryogenic storage tank, comprising:

[0022] A plurality of heat conduction units arranged axially in the cryogenic storage tank;

[0023] Wherein, the heat conduction unit includes a heat conduction ring whose shape is adapted to the inner wall of the cryogenic storage tank, the outer edge of the heat conduction ring is connected to the inner wall of the cryogenic storage tank, a plurality of heat conduction fins are arranged on the inner edge of the heat conduction ring, and the support of the heat conduction fin is connected to the inner edge of the heat conduction ring.

[0024] Optionally, the cryogenic storage tank is cylindrical, the heat conducting unit is arranged perpendicular to the axial direction of the cryogenic storage tank, and a plurality of the heat conducting units are arranged at equal intervals in the axial direction of the cryogenic storage tank.

[0025] Optionally, the plurality of heat-conducting fins on the inner edge of the heat-conducting ring are arranged at equal intervals, the main heat pipes of the heat-conducting fins are arranged radially along the cryogenic storage tank, the auxiliary heat pipes are arranged axially perpendicular to the main heat pipes, and the ends of the main heat pipes of the plurality of heat-conducting fins enclose a circular manhole in the middle of the cryogenic storage tank;

[0026] In the direction away from the axis of the storage tank, the length of the auxiliary heat conducting pipe on the main heat conducting pipe of the heat conducting fin gradually increases.

[0027] The beneficial effects of the present invention are:

[0028] During the heat conduction process, the heat conducting fins can not only make the medium temperature uniform through their own heat conduction, but also the main heat pipe and the auxiliary heat pipe are connected so that when there is a temperature difference of the liquid medium in the vertical direction, the density difference caused by the temperature difference can cause the liquid medium to flow in the main heat pipe or the auxiliary heat pipe, so that the liquid with low temperature and high density flows downward, and the liquid medium has a certain fluidity, thereby further improving the temperature uniformity of the liquid medium;

[0029] The auxiliary heat pipe can swing elastically along with the main heat pipe, so that when the liquid medium moves, the heat conducting fins can swing elastically, and the elastic deformation of the elastic component is used to achieve buffering, thereby avoiding damage to the heat conducting fins. The elastic component is an elastically deformable frame structure. Through the connection with the driving block, it can not only realize the elastic sliding of the driving block in any direction, but also make the swing of the main heat pipe in any direction elastic. Moreover, when the elastic component is elastically deformed, all the elastic blocks that make up the frame structure participate in the elastic deformation, and the force is dispersed to each elastic part of the frame structure, so that the utilization rate and remaining life of the entire frame structure are uniform, and the elastic force on the elastic movement of the main heat pipe is uniform.

[0030] When storing liquid helium in a cryogenic storage tank, the heat transfer unit installed quickly transfers the heat around the tank wall to the liquid in the middle of the tank, distributing the heat evenly. This prevents the slow heat conduction of the liquid from causing the temperature of the liquid around the tank wall to be higher than the temperature of the liquid in the middle of the tank, and prevents the liquid around the tank wall from continuously absorbing heat and heating up and vaporizing, which may cause safety hazards to the tank.

[0031] Both ends of the main heat pipe are open. When there is a temperature difference between the liquid in the middle of the storage tank and the liquid around the tank wall, and the temperature of the liquid in the middle is lower than that of the liquid around the tank wall, due to the lower temperature and higher density of the liquid in the middle, and the higher temperature and lower density of the liquid around the tank wall, the liquid in the main heat pipe at the lower part of the storage tank flows downward. The main heat pipe provides a direct flow path, reducing the interference and resistance of the surrounding liquid. The liquid at the top of the main heat pipe, which is at a low temperature in the middle of the storage tank, flows downward into the liquid around the tank wall through the main heat pipe, making the liquid in the storage tank have a certain fluidity and making the temperature of the liquid medium in the storage tank uniform.

[0032] Under the transportation condition of the storage tank, multiple heat conduction units act as baffle plates. The heat conduction units reduce liquid fluctuations and resist liquid impacts. Moreover, the heat conduction fins in the heat conduction units can all undergo elastic deformation, converting the sharp impact force into a flexible load to bear. The elastic components absorb the energy generated by the impact, reducing the damage to the heat conduction units caused by liquid impacts. When the heat conduction fins elastically reset, the elastic force acts on the liquid in the opposite direction, further increasing the turbulence of the flow field and improving the wave dissipation efficiency, achieving the purpose of reducing waves. The direction of the elastic movement of the heat conduction fins is not restricted, enabling them to adapt to different liquid impact directions. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Structural diagram of the heat conduction fin

[0035] Figure 2 Internal structural diagram of the support

[0036] Figure 3 Internal structural diagram of the drive box

[0037] Figure 4 Structural diagram of the elastic component in the reset state

[0038] Figure 5 Structural diagram of the elastic component in the elastically deformed state

[0039] Figure 6 Internal structural diagram of the low-temperature storage tank

[0040] Figure 7 Structural diagram of the heat conduction fin in the heat conduction unit

[0041] Reference numerals: 1, support; 2, main heat pipe; 3, auxiliary heat conduction pipe; 4, pipe hole; 5, swing groove; 6, diaphragm; 7, support rod; 8, first universal ball; 9, elastic groove; 10, telescopic rod; 11, second universal ball; 12, ball seat; 13, drive box; 14, swing hole; 15, drive block; 16, swivel base; 17, elastic block; 18, collar; 19, pull rope; 100, heat conduction ring; 200, manhole. Detailed implementation manners

[0042] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0045] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0046] As Figures 1 to 5 shown, the present invention discloses a heat conduction fin, including a support 1. A swingable main heat pipe 2 is provided on the support 1. A plurality of auxiliary heat conduction pipes 3 are evenly distributed on the main heat pipe 2, and fins are evenly distributed on the auxiliary heat conduction pipes 3.

[0047] Both ends of the auxiliary heat conduction pipe 3 are open and communicate with the main heat pipe 2. The auxiliary heat conduction pipe 3 is arranged perpendicular to the axial direction of the main heat pipe 2. The end of the main heat pipe 2 away from the support 1 is an open end, and the end of the main heat pipe 2 close to the support 1 is a closed end.

[0048] At least one set of holes is provided on the main heat pipe 2 at the closed end side. Multiple sets of holes are arranged at equal intervals in the axial direction of the main heat pipe 2. Each set of holes includes a plurality of pipe holes 4 arranged at equal intervals in the circumferential direction of the main heat pipe 2.

[0049] A frustum-shaped swing groove 5 with a larger diameter end facing the main heat pipe 2 is provided on the side of the support 1 close to the main heat pipe 2. A first universal ball 8 is rotatably provided in the support 1 at the bottom of the swing groove 5. A support rod 7 is coaxially connected to the closed end of the main heat pipe 2. The first universal ball 8 is coaxially connected to the support rod 7, so that the main heat pipe 2 can swing arbitrarily within a certain range on the support 1 through the first universal ball 8.

[0050] A diaphragm 6 is provided in the swing groove 5. The diaphragm 6 is annular. The outer edge of the diaphragm 6 is connected to the inner wall of the swing groove 5, and the inner edge of the diaphragm 6 is connected to the inner wall of the support rod 7. The diaphragm 6 is made of a flexible material. When the main heat pipe 2 and the support rod 7 swing on the support 1, the diaphragm 6 deforms correspondingly, and the diaphragm 6 can prevent the medium from entering the interior of the support 1.

[0051] An elastic driving mechanism is provided in the support 1 to elastically swing the support rod 7 and the main heat pipe 2. The main heat pipe 2 and the support rod 7 swing under an external force, and after the external force disappears, the main heat pipe 2 and the support rod 7 return to their original positions under the elastic force of the elastic driving mechanism. In the reset state, the main heat pipe 2 and the support rod 7 are coaxial with the swing groove 5.

[0052] The elastic driving mechanism includes an elastic groove 9 provided in the support 1 inside the first universal ball 8. A driving box 13 is provided in the elastic groove 9. The driving box 13 is flat. A circular swing hole 14 coaxial with the first universal ball 8 is provided on the side of the driving box 13 close to the first universal ball 8.

[0053] A cylindrical driving block 15 is slidably provided in the driving box 13. The top and bottom of the driving block 15 are in sliding contact with the inner top and inner bottom of the driving box 13 respectively. A ball seat 12 is provided at the center of the top surface of the driving block 15. A second universal ball 11 is rotatably provided in the ball seat 12. The ball seat 12 is located in the swing hole 14. A telescopic rod 10 is coaxially connected between the second universal ball 11 and the first universal ball 8. When the main heat pipe 2 and the support rod 7 are in the reset state, the main heat pipe 2, the support rod 7, the first universal ball 8, the telescopic rod 10, the second universal ball 11, and the driving block 15 are coaxial.

[0054] An elastic component that cooperates with the driving block 15 is provided inside the driving box 13. The elastic component includes a regular hexagon-shaped surrounding frame. The surrounding frame surrounds the driving block 15 and is coaxial with the swinging hole 14. The surrounding frame is elastic and can undergo elastic deformation. The surrounding frame includes six rotating seats 16, and the six rotating seats 16 are respectively located at the six corners of the regular hexagon-shaped surrounding frame. The rotating seats 16 are rotatably connected to the driving box 13, and the rotation axes of the rotating seats 16 are parallel to the axial direction of the driving block 15. An elastic block 17 is provided between two adjacent rotating seats 16. The elastic block 17 is strip-shaped, and both ends of the elastic block 17 are inserted into the two rotating seats 16 respectively. The elastic block 17 is composed of multiple elastic sheets arranged closely. Sleeve rings 18 are sleeved on three of the elastic blocks 17 of the surrounding frame, and only one of the adjacent two elastic blocks 17 is sleeved with a sleeve ring 18. A pulling rope 19 is connected between the sleeve ring 18 and the driving block 15. The connection points of the three pulling ropes 19 on the driving block 15 are spaced apart by a central angle of 120 degrees in the circumferential direction of the driving block 15.

[0055] When the main heat pipe 2 is not subjected to external force, the surrounding frame is in the shape of a regular hexagon, the three pulling ropes 19 are taut, and the driving block 15 is located at the center of the surrounding frame. When the main heat pipe 2 swings under the action of an external force, the support rod 7 swings accordingly, driving the first universal ball 8 to rotate. The rotation of the first universal ball 8 drives the telescopic rod 10 to swing. The second universal ball 11 and the ball seat 12 at the end of the telescopic rod 10 swing, driving the driving block 15 to slide in the driving box 13. The second universal ball 11 rolls correspondingly, and the telescopic rod 10 extends correspondingly. When the driving block 15 slides in any direction in the driving box 13, one or two of the pulling ropes 19 pull the corresponding sleeve rings 18, and the corresponding elastic blocks 17 bend elastically inward. The rotating seats 16 rotate and drive the elastic blocks 17 adjacent to the inward-bending elastic blocks 17 to bend elastically outward. The surrounding frame undergoes elastic deformation. The bending directions of two adjacent elastic blocks 17 of the surrounding frame are opposite, one bends inward and the other bends outward elastically. When the external force applied to the main heat pipe 2 disappears or decreases to a level insufficient to push the main heat pipe 2 to swing, the surrounding frame undergoes elastic reset. The elastic blocks 17 that bend outward elastically reset inward and return to a straight strip shape, and the elastic blocks 17 that bend inward elastically reset outward and return to a straight strip shape. The three sleeve rings 18 drive the three pulling ropes 19 to be taut, causing the driving block 15 to be located at the center of the surrounding frame. At this time, the driving block 15 is coaxial with the swinging hole 14, and the second universal ball 11, the telescopic rod 10, the first universal ball 8, the support rod 7, and the main heat pipe 2 are coaxial. The main heat pipe 2 undergoes elastic reset.

[0056] During the heat conduction process, the heat conduction fins can not only make the temperature of the medium uniform through their own heat conduction, but also since the main heat pipe 2 and the auxiliary heat pipes 3 are connected and there is a temperature difference of the liquid medium in the vertical direction, the density difference caused by the temperature difference can cause the liquid medium to flow in the main heat pipe 2 or the auxiliary heat pipes 3, making the liquid with a lower temperature and higher density flow downward, giving the liquid medium a certain fluidity to further improve the temperature uniformity of the liquid medium.

[0057] The auxiliary heat pipe 3 can swing elastically along with the main heat pipe 2, so that when the liquid medium moves, the heat-conducting fins can swing elastically, and the elastic deformation of the elastic component is used to achieve buffering to avoid damage to the heat-conducting fins. The elastic component is an elastically deformable frame structure. Through the connection with the driving block 15, it can not only realize the elastic sliding of the driving block 15 in any direction, but also make the swing of the main heat pipe 2 in any direction elastic. Moreover, when the elastic component is elastically deformed, all the elastic blocks 17 that make up the frame structure participate in the elastic deformation, and the force is dispersed to the elastic parts of the frame structure, so that the utilization rate and the remaining life of the entire frame structure are uniform, and the elastic force on the elastic movement of the main heat pipe 2 is uniform.

[0058] like Figure 6 and Figure 7 As shown, the present invention also discloses a low-temperature storage tank, which is cylindrical in shape and is provided with a plurality of heat-conducting units arranged perpendicular to the axial direction. The plurality of heat-conducting units are arranged at equal intervals in the axial direction of the tank. The heat-conducting unit includes a heat-conducting ring 100, the outer edge of the heat-conducting ring 100 is connected to the inner wall of the tank, a plurality of heat-conducting fins are arranged at equal intervals on the inner edge of the heat-conducting ring 100, the support 1 of the heat-conducting fin is connected to the inner edge of the heat-conducting ring 100, the main heat-conducting pipe 2 of the heat-conducting fin is arranged along the radial direction of the tank, the end of the main heat-conducting pipe 2 is at a certain distance from the axis of the tank, and the ends of the main heat-conducting pipe 2 of the multiple heat-conducting fins enclose a circular manhole 200 for people to pass through. In the direction away from the axis of the tank, the length of the auxiliary heat-conducting pipe 3 on the main heat-conducting pipe 2 of the heat-conducting fin gradually increases, so that the outline of the heat-conducting fin is truncated cone-shaped, thereby avoiding uneven gaps between adjacent heat-conducting fins.

[0059] When storing liquid helium in a cryogenic storage tank, the heat conduction unit installed quickly transfers the heat around the tank wall to the liquid in the middle of the tank, dispersing the heat evenly. This prevents the slow heat conduction of the liquid from causing the temperature of the liquid around the tank wall to be higher than the temperature of the liquid in the middle of the tank, and prevents the liquid around the tank wall from continuously absorbing heat and heating up and vaporizing, causing safety hazards to the tank.

[0060] Both ends of the main heat pipe 2 are open. When a temperature difference occurs between the liquid in the middle of the tank and the liquid around the tank wall, and the temperature of the middle liquid is lower than the temperature of the liquid around the tank wall, due to the low temperature and high density of the middle liquid and the high temperature and low density of the liquid around the tank wall, the liquid in the main heat pipe 2 at the lower part of the tank flows downward. The main heat pipe 2 provides a direct flow path, reducing the interference and resistance of the surrounding liquid. The low-temperature liquid in the middle of the tank at the top of the main heat pipe 2 flows downward from the main heat pipe 2 into the surrounding tank wall, so that the liquid in the tank has a certain fluidity, making the temperature of the liquid medium in the tank uniform.

[0061] Under transportation conditions of the storage tank, multiple heat conduction units function as wave baffles. The heat conduction units reduce liquid fluctuations, resist liquid impacts, and the heat conduction fins in the heat conduction units can all undergo elastic deformation to convert the sharp impact into a flexible load to bear. Part of the energy generated by the impact is absorbed by the elastic deformation of the elastic components, reducing the damage to the heat conduction units caused by liquid impacts. When the heat conduction fins elastically reset, the elastic force acts on the liquid in the opposite direction, further increasing the turbulence of the flow field and improving the wave dissipation efficiency to achieve the purpose of reducing waves. The direction of the elastic movement of the heat conduction fins is not restricted, enabling them to adapt to different liquid impact directions.

[0062] The above embodiments are only preferred embodiments of the present invention and do not limit the technical solutions of the present invention. Any technical solution that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the present invention.

Claims

1. A heat-conducting fin, characterized in that, Comprising: A support; A main heat pipe, swingably arranged on the support; A plurality of auxiliary heat pipes, uniformly arranged on the main heat pipe and communicating with each other; Fins, uniformly arranged on the auxiliary heat pipes; Wherein, a first universal ball is rotatably arranged on the support, the main heat pipe is connected to the first universal ball, and an elastic driving mechanism is arranged inside the support to elastically swing the main heat pipe; The elastic driving mechanism includes an elastic groove opened in the support inside the inner side of the first universal ball, a telescopic rod coaxially connected to the first universal ball is arranged in the elastic groove, a driving box is arranged in the elastic groove, a driving block connected to the telescopic rod is slidably arranged in the driving box, and an elastic component cooperating with the driving block is arranged in the driving box; The elastic component includes a regular hexagon-shaped elastic frame, the frame includes six rotating seats respectively located at six corners of the regular hexagon frame, the rotating seats are rotatably connected to the driving box, an elastic block is arranged between adjacent two rotating seats, and a pulling rope connected to the driving block is sleeved on three of the elastic blocks of the frame, and the three pulling ropes are connected at a central angle of 120 degrees in the circumferential direction of the driving block.

2. The heat-conducting fin according to claim 1, characterized in that, The end of the main heat pipe away from the support is an open end, the end of the main heat pipe close to the support is a closed end, a support rod is coaxially connected to the closed end of the main heat pipe, and the support rod is coaxially connected to the first universal ball; One or more circles of hole groups are opened on the main heat pipe at the side of the closed end, the multi-circle hole groups are arranged at equal intervals in the axial direction of the main heat pipe, and each circle of hole group includes a plurality of pipe holes opened at equal intervals in the circumferential direction of the main heat pipe.

3. The heat-conducting fin according to claim 2, wherein, A frustum-shaped swing groove with a larger diameter end facing the main heat pipe is opened on the side of the support close to the main heat pipe, and the first universal ball is rotatably arranged inside the support at the bottom of the swing groove; An annular diaphragm is arranged in the swing groove, the outer edge of the diaphragm is connected to the inner wall of the swing groove, and the inner edge of the diaphragm is connected to the inner wall of the support rod.

4. The heat-conducting fin according to claim 1, wherein, The driving box is flat, a circular swing hole coaxial with the first universal ball is opened on the side of the driving box close to the first universal ball, the driving block is cylindrical, a ball seat connected to the center of the driving block is arranged in the swing hole, and a second universal ball is rotatably arranged on the ball seat, and the telescopic rod is coaxially connected to the second universal ball.

5. The heat-conducting fin according to claim 4, characterized in that, The frame surrounds the driving block and is coaxial with the swing hole, only one of the adjacent two elastic blocks of the frame is sleeved with a collar, and the pulling rope is connected to the collar to realize the sleeving with the elastic block; 6. The heat-conducting fin according to claim 4, wherein The rotation axis of the rotating seat is parallel to the axial direction of the driving block, the elastic block is strip-shaped, both ends of the elastic block are inserted into the two rotating seats respectively, and the elastic block is a plurality of closely arranged elastic sheets.

7. A cryogenic storage tank, characterized in that, Comprising: A plurality of heat conduction units, arranged in the axial direction of the low-temperature storage tank; Wherein, the heat conduction unit includes a heat conduction ring whose shape is adapted to the inner wall of the low-temperature storage tank, the outer edge of the heat conduction ring is connected to the inner wall of the low-temperature storage tank, a plurality of heat conduction fins as described in any one of claims 1 to 6 are arranged on the inner edge of the heat conduction ring, and the support of the heat conduction fins is connected to the inner edge of the heat conduction ring.

8. The cryogenic storage tank according to claim 7, characterized in that, The low-temperature storage tank is cylindrical, the heat conduction units are arranged perpendicular to the axial direction of the low-temperature storage tank, and a plurality of the heat conduction units are arranged at equal intervals in the axial direction of the low-temperature storage tank.

9. The cryogenic storage tank according to claim 8, characterized in that, A plurality of heat-conducting fins on the inner edge of the heat-conducting ring are arranged at equal intervals. The main heat pipes of the heat-conducting fins are arranged radially along the low-temperature storage tank, and the secondary heat pipes are arranged perpendicular to the axial direction of the main heat pipes. The ends of the main heat pipes of the plurality of heat-conducting fins enclose a circular manhole in the middle of the low-temperature storage tank. In the direction away from the axis of the storage tank, the length of the secondary heat pipes on the main heat pipes of the heat-conducting fins gradually increases.

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