Heat conduction fin and low-temperature storage tank

Abstract

The invention provides a heat conduction fin and a low-temperature storage tank, and relates to the technical field of heat exchange parts. The heat conduction fin comprises a support, the main heat conduction pipe is arranged on the support in a swinging mode, the auxiliary heat conduction pipes are evenly arranged on the main heat conduction pipe and communicated with the main heat conduction pipe, the fins are evenly arranged on the auxiliary heat conduction pipes, a first universal ball is arranged on the support in a rolling mode, the main heat conduction pipe is connected with the first universal ball, and an elastic driving mechanism is arranged in the support to enable the main heat conduction pipe to swing elastically. The low-temperature storage tank comprises a plurality of heat conduction units arranged in the axial direction of the low-temperature storage tank, each heat conduction unit comprises a heat conduction ring matched with the inner wall of the low-temperature storage tank in shape, the outer edge of each heat conduction ring is connected with the inner wall of the low-temperature storage tank, a plurality of heat conduction fins are arranged on the inner edge of each heat conduction ring, and supports of the heat conduction fins are connected to the inner edge of each heat conduction ring. The temperature of the liquid medium is uniform through heat conduction, and potential safety hazards of the storage tank caused by temperature rise gasification of the local liquid medium due to poor heat conduction are avoided.

Description

Technical Field

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

[0002] Cryogenic tanks are equipment specially designed for storing cryogenic liquids (such as liquid nitrogen, liquid oxygen, liquid argon and liquid helium, etc.). These tanks have excellent insulation properties and can effectively maintain the low temperature state of the internal liquid.

[0003] The latent heat of vaporization of liquid helium is smaller than that of oxygen, nitrogen and argon media. It is easy to be vaporized by absorbing heat. After the liquid is vaporized, the gas in the tank increases, which will cause overpressure damage to the tank. According to the physical properties of liquid helium, the thermal conductivity of gas is much larger than that of liquid. Therefore, when the tank is full of liquid, the liquid conducts heat very slowly, which will cause the temperature of the liquid around the tank to be higher than the temperature of the liquid in the middle of the tank. Continuous heat transfer causes the liquid around the tank to be quickly vaporized into gas, causing safety hazards to the tank. Summary of the invention

[0004] The purpose of the present invention is to develop a heat-conducting fin and a low-temperature storage tank that can make the temperature of a liquid medium uniform by heat conduction, thereby avoiding the potential safety hazard of the storage tank caused by the temperature rise and gasification of the local liquid medium due to poor thermal conductivity.

[0005] The present invention is achieved through the following technical solutions: A heat-conducting fin, comprising: Support; The main heat pipe is swingably mounted on a support; A plurality of auxiliary heat pipes are evenly arranged on the main heat pipe and the two are connected; The fins are evenly arranged on the secondary heat conducting pipe; 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 in the support to make the main heat pipe swing elastically.

[0006] Optionally, the end of the main heat pipe away from the support is an open end, and the end of the main heat pipe close to the support is a closed end, and the closed end of the main heat pipe is coaxially connected to a support rod, and the support rod is coaxially connected to the first universal ball; At least one circle of hole groups is provided on the main heat pipe at the side of the closed end, and multiple circles of hole groups are arranged at equal intervals in the axial direction of the main heat pipe, and each circle of hole groups includes a plurality of tube holes provided at equal intervals in the circumferential direction of the main heat pipe.

[0007] Optionally, the support is provided with a truncated cone-shaped swing groove at the side close to the main heat pipe, with the end with a larger diameter facing the main heat pipe, and the first universal ball rolls in 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.

[0008] Optionally, the elastic driving mechanism includes an elastic groove opened in the inner side support of the first universal ball, a telescopic rod coaxially connected to the first universal ball is provided in the elastic groove, and an elastic component cooperating with the end of the telescopic rod is provided in the elastic groove.

[0009] Optionally, a flat drive box is provided in the elastic groove, a circular swing hole is provided on the side of the drive box close to the first universal ball and is coaxial with the first universal ball, a cylindrical drive block is slidably provided in the drive box, a ball seat connected to the center of the drive block is provided in the swing hole, a second universal ball is rollingly provided on the ball seat, the telescopic rod is coaxially connected to the second universal ball, and the elastic component is provided in the drive box and cooperates with the drive block.

[0010] Optionally, the elastic component comprises a regular hexagonal elastic frame, the frame is arranged around the driving block and is coaxial with the swing hole, and three sides of the frame are sleeved with rings, wherein: Only one of the two adjacent sides of the frame is provided with a collar, a pull rope is connected between the collar and the driving block, and the connection points of the three pull ropes on the driving block are spaced apart at a central angle of 120 degrees in the circumferential direction of the driving block.

[0011] Optionally, the frame includes six swivel seats, which are respectively located at six corners of a regular hexagonal frame. The swivel seats are rotatably connected to the drive box, and the rotation axis of the swivel seat is parallel to the axial direction of the drive block. A spring block is provided between two adjacent swivel seats, and the spring block is in the shape of a long strip. Both ends of the spring block are respectively plugged into two swivel seats, and the spring block is a plurality of tightly arranged spring pieces, and the ring is sleeved on the corresponding spring block.

[0012] A cryogenic storage tank, comprising: A plurality of heat transfer units are arranged in the axial direction of the cryogenic storage tank; Wherein, the heat conductive unit comprises a heat conductive ring whose shape is adapted to the inner wall of the cryogenic storage tank, the outer edge of the heat conductive ring is connected to the inner wall of the cryogenic storage tank, a plurality of heat conductive fins as described in any one of claims 1 to 7 are arranged on the inner edge of the heat conductive ring, and the support of the heat conductive fin is connected to the inner edge of the heat conductive ring.

[0013] 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.

[0014] 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; 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.

[0015] The beneficial effects of the present invention are: 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, so as to further improve the temperature uniformity of the liquid medium; The auxiliary heat pipe can swing elastically with the main heat pipe, so that when the liquid medium moves, the heat conducting fins can swing elastically, and buffering is achieved through the elastic deformation of the elastic component to avoid 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. When the elastic component is elastically deformed, all the elastic blocks constituting 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 the remaining life of the entire frame structure are uniform, and the elastic force on the elastic movement of the main heat pipe is uniform; 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, so that the heat is evenly dispersed, avoiding the slow heat conduction of the liquid 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 avoiding the liquid around the tank wall continuously absorbing heat and heating up and gasifying, causing safety hazards to the tank; Both ends of the main heat pipe 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 that of the liquid around the tank wall, the liquid in the main heat pipe at the bottom of the tank flows downward 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 main heat pipe 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 flows downward from the main heat pipe into the tank wall, so that the liquid in the tank has a certain fluidity, making the temperature of the liquid medium in the tank uniform. When the storage tank is in transportation condition, multiple heat transfer units act as wave-breaking plates, which reduce liquid fluctuations and resist liquid impact. The heat transfer fins in the heat transfer units can be elastically deformed, and the sharp impact is transformed into a flexible load to bear. The energy generated by the impact is absorbed by the elastic component, reducing the damage to the heat transfer unit caused by the liquid impact. When the heat transfer fins are elastically reset, the elastic force reacts on the liquid, further increasing the turbulence of the flow field and improving the wave dissipation efficiency, thereby achieving the purpose of reducing waves. The direction of the elastic movement of the heat transfer fins is not restricted, so that it can adapt to different liquid impact directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is the structural diagram of the heat conducting fin; Figure 2 The internal structure diagram of the support; Figure 3 This is the internal structure diagram of the drive box; Figure 4 is a structural diagram of the elastic component in a reset state; Figure 5 is a structural diagram of an elastic component in an elastic deformation state; Figure 6 This is the internal structure diagram of the cryogenic storage tank; Figure 7 This is a diagram of the heat conduction fin structure in the heat conduction unit.

[0018] Figure numerals: 1. support; 2. main heat pipe; 3. auxiliary heat 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 seat; 17. spring block; 18. ring; 19. pull rope; 100. heat transfer ring; 200. manhole. DETAILED DESCRIPTION

[0019] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 should not be understood as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 to Figure 5 As shown, the present invention discloses a heat-conducting fin, comprising a support 1, on which a swingable main heat-conducting pipe 2 is provided, on which a plurality of auxiliary heat-conducting pipes 3 are evenly distributed, and on which fins are evenly distributed.

[0024] Both ends of the auxiliary heat pipe 3 are open and connected to the main heat pipe 2. The auxiliary heat 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.

[0025] At least one circle of hole groups is provided on the main heat pipe 2 at the closed end side, and the multiple circles of hole groups are arranged at equal intervals in the axial direction of the main heat pipe 2 . Each circle of hole groups includes a plurality of tube holes 4 provided at equal intervals in the circumferential direction of the main heat pipe 2 .

[0026] A truncated cone-shaped swing groove 5 with a larger diameter end facing the main heat pipe 2 is provided on the side of the support 1 near the main heat pipe 2. A first universal ball 8 is rolled 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. The main heat pipe 2 can swing arbitrarily within a certain range on the support 1 through the first universal ball 8.

[0027] A diaphragm 6 is provided in the swing groove 5. The diaphragm 6 is annular, and 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 is deformed accordingly, and the diaphragm 6 can prevent the medium from entering the support 1.

[0028] An elastic driving mechanism is provided in the support 1 to enable the support rod 7 and the main heat pipe 2 to swing elastically. The main heat pipe 2 and the support rod 7 swing under the external force. After the external force disappears, the main heat pipe 2 and the support rod 7 are reset under the elastic force of the elastic driving mechanism. In the reset state, the main heat pipe 2 and the support rod 7 are in a coaxial state with the swing groove 5.

[0029] The elastic driving mechanism includes an elastic groove 9 opened in the inner support 1 of the first universal ball 8, and a driving box 13 is arranged in the elastic groove 9. The driving box 13 is flat and has a circular swing hole 14 coaxial with the first universal ball 8 opened on the side of the driving box 13 close to the first universal ball 8.

[0030] A cylindrical driving block 15 is slidably provided in the driving box 13, and the top and bottom of the driving block 15 are in sliding contact with the top and 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, and a second universal ball 11 is rotatably provided in the ball seat 12. The ball seat 12 is located in the swing hole 14, and 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 and the support rod 7 are in a coaxial state with the first universal ball 8, the telescopic rod 10, the second universal ball 11, and the driving block 15.

[0031] An elastic component that cooperates with the driving block 15 is provided in the driving box 13. The elastic component includes a regular hexagonal frame. The frame is arranged around the driving block 15 and is coaxial with the swing hole 14. The frame is elastic and can be elastically deformed. The frame includes six rotating seats 16. The six rotating seats 16 are respectively located at the six corners of the regular hexagonal frame. The rotating seats 16 are rotatably connected to the driving box 13. The rotating axis of the rotating seat 16 is 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 in the shape of a long strip. The two ends of the elastic block 17 are respectively plugged into the two rotating seats 16. The elastic block 17 is a plurality of tightly arranged elastic pieces. Three of the elastic blocks 17 of the frame are provided with collars 18, and only one of the two adjacent elastic blocks 17 is provided with a collar 18. A pull rope 19 is connected between the collar 18 and the driving block 15 , and the connection points of the three pull ropes 19 on the driving block 15 are spaced apart at a central angle of 120 degrees in the circumferential direction of the driving block 15 .

[0032] When the main heat pipe 2 is not subjected to external force, the frame is in a regular hexagon, the three pull ropes 19 are tightened, and the drive block 15 is in the center of the frame. When the main heat pipe 2 is swung by external force, the support rod 7 swings accordingly, driving the first universal ball 8 to rotate, and the rotation of the first universal ball 8 drives the telescopic rod 10 to swing, and the second universal ball 11 and the ball seat 12 at the end of the telescopic rod 10 swing to drive the drive block 15 to slide in the drive box 13, and the second universal ball 11 rolls accordingly and the telescopic rod 10 extends accordingly. When the drive block 15 slides in any direction in the drive box 13, one or two of the pull ropes 19 pull the corresponding ring 18, and the corresponding block 17 elastically bends inwardly, and the swivel seat 16 rotates and drives the block 17 adjacent to the inwardly bent block 17 to bend elastically outward, and the frame is elastically deformed, and the adjacent blocks of the frame are deformed. The two spring blocks 17 are bent in opposite directions, one is elastically bent inwards and the other is elastically bent outwards. When the external force on the main heat pipe 2 disappears or is reduced to a level that is insufficient to push the main heat pipe 2 to swing, the frame is elastically reset, and the spring block 17 bent outwards is elastically reset inwards to return to a straight strip shape, and the spring block 17 bent inwards is elastically reset outwards to return to a straight strip shape. The three rings 18 then drive the three pull ropes 19 to be tightened so that the drive block 15 is at the center of the frame. At this time, the drive block 15 is coaxial with the swing hole 14, 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, and the main heat pipe 2 is elastically reset.

[0033] During the heat conduction process, the heat-conducting fins can not only make the temperature of the medium uniform through their own heat conduction, but also the main heat pipe 2 and the auxiliary heat pipe 3 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 2 or the auxiliary heat pipe 3, so that the liquid with low temperature and high density flows downward, and the liquid medium has a certain fluidity, so as to further improve the temperature uniformity of the liquid medium.

[0034] The auxiliary heat pipe 3 can swing elastically with the main heat pipe 2, so that when the liquid medium moves, the heat-conducting fins can swing elastically, and buffering is achieved through the elastic deformation of the elastic component 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. 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.

[0035] like Figure 6 and Figure 7As 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, and the plurality of heat-conducting units are arranged at equal intervals in the axial direction of the storage 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 storage tank, and a plurality of heat-conducting fins are arranged at equal intervals on the inner edge of the heat-conducting ring 100, and the support 1 of the heat-conducting fin is connected to the inner edge of the heat-conducting ring 100, and the main heat-conducting pipe 2 of the heat-conducting fin is arranged along the radial direction of the storage tank, and the end of the main heat-conducting pipe 2 is at a certain distance from the axis of the storage tank, and the ends of the main heat-conducting pipe 2 of the heat-conducting fins enclose a circular manhole 200 for personnel to pass through. In the direction away from the axis of the storage 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, so as to avoid uneven gaps between two adjacent heat-conducting fins.

[0036] When a cryogenic storage tank stores liquid helium, the heat transfer unit installed in the tank quickly transfers the heat around the tank wall to the liquid in the middle of the tank, so that the heat is evenly dispersed, avoiding the slow heat conduction of the liquid 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 avoiding the liquid around the tank wall continuously absorbing heat and heating up and vaporizing, causing safety hazards to the tank.

[0037] 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, the liquid in the main heat pipe 2 at the bottom of the tank flows downward 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 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 of the tank wall, so that the liquid in the tank has a certain fluidity, making the temperature of the liquid medium in the tank uniform.

[0038] When the storage tank is in transportation condition, multiple heat transfer units act as wave-breaking plates, which reduce liquid fluctuations and resist liquid impact. The heat transfer fins in the heat transfer units can be elastically deformed to transform the sharp impact into a flexible load. The elastic deformation of the elastic component absorbs part of the energy generated by the impact, reducing the damage to the heat transfer unit caused by the liquid impact. When the heat transfer fins are elastically reset, the elastic force reacts on the liquid, further increasing the turbulence of the flow field and improving the wave dissipation efficiency, thereby achieving the purpose of reducing waves. The direction of the elastic movement of the heat transfer fins is not restricted, so that it can adapt to different liquid impact directions.

[0039] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A heat conducting fin, characterized in that: include: Support; The main heat pipe is swingably mounted on a support; A plurality of auxiliary heat pipes are evenly arranged on the main heat pipe and the two are connected; The fins are evenly arranged on the secondary heat conducting pipe; 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 in the support to make the main heat pipe swing elastically.

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, and the end of the main heat pipe close to the support is a closed end. The closed end of the main heat pipe is coaxially connected with a support rod, and the support rod is coaxially connected with the first universal ball; At least one circle of hole groups is provided on the main heat pipe at the side of the closed end, and multiple circles of hole groups are arranged at equal intervals in the axial direction of the main heat pipe, and each circle of hole groups includes a plurality of tube holes provided at equal intervals in the circumferential direction of the main heat pipe.

3. The heat conducting fin according to claim 2, characterized in that: The side of the support close to the main heat pipe is provided with a truncated cone-shaped swing groove with a larger diameter end facing the main heat pipe, and the first universal ball is rolled in 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, characterized in that: The elastic driving mechanism comprises an elastic groove opened in the inner side support of the first universal ball, a telescopic rod coaxially connected to the first universal ball is arranged in the elastic groove, and an elastic component matched with the end of the telescopic rod is arranged in the elastic groove.

5. The heat conducting fin according to claim 4, characterized in that: A flat drive box is provided in the elastic groove, a circular swing hole is provided on the side of the drive box close to the first universal ball and is coaxial with the first universal ball, a cylindrical drive block is slidably provided in the drive box, a ball seat connected to the center of the drive block is provided in the swing hole, a second universal ball is rotatably provided on the ball seat, the telescopic rod is coaxially connected to the second universal ball, and the elastic component is provided in the drive box and cooperates with the drive block.

6. The heat conducting fin according to claim 5, characterized in that: The elastic component comprises a regular hexagonal elastic frame, which is arranged around the driving block and is coaxial with the swing hole, and three sides of the frame are sleeved with collars, wherein: Only one of the two adjacent sides of the frame is provided with a collar, a pull rope is connected between the collar and the driving block, and the connection points of the three pull ropes on the driving block are spaced apart at a central angle of 120 degrees in the circumferential direction of the driving block.

7. The heat conducting fin according to claim 6, characterized in that: The frame includes six swivel seats, which are respectively located at the six corners of the regular hexagonal frame. The swivel seats are rotatably connected to the drive box. The rotation axis of the swivel seat is parallel to the axial direction of the drive block. A spring block is arranged between two adjacent swivel seats. The spring block is in the shape of a long strip. Both ends of the spring block are respectively plugged into the two swivel seats. The spring block is a plurality of tightly arranged spring pieces, and the ring is sleeved on the corresponding spring block.

8. A cryogenic storage tank, characterized in that: include: A plurality of heat transfer units are arranged in the axial direction of the cryogenic storage tank; Wherein, the heat conductive unit comprises a heat conductive ring whose shape is adapted to the inner wall of the cryogenic storage tank, the outer edge of the heat conductive ring is connected to the inner wall of the cryogenic storage tank, a plurality of heat conductive fins as described in any one of claims 1 to 7 are arranged on the inner edge of the heat conductive ring, and the support of the heat conductive fin is connected to the inner edge of the heat conductive ring.

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

10. The cryogenic storage tank according to claim 9, characterized in that: The multiple 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-conducting pipes are arranged perpendicularly to the axial direction of the main heat pipes, and the ends of the main heat pipes of the multiple heat-conducting fins enclose a circular manhole in the middle of the cryogenic storage tank; 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.

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