Liquid hydrogen storage sphere and storage process thereof

Abstract

The application relates to a liquid hydrogen storage spherical tank and a storage process thereof, and relates to the technical field of the liquid hydrogen storage spherical tank. The storage spherical tank comprises an outer sphere, a liquid nitrogen screen, an inner sphere, a supporting mechanism, a plurality of connecting mechanisms, a heat insulation piece and a liquid conveying mechanism. The supporting mechanism is used for supporting the outer sphere. The liquid nitrogen screen is arranged on the outer sphere. The plurality of connecting mechanisms are arranged on the inner sphere and connected with the outer sphere through the liquid nitrogen screen. A heat insulation chamber is matched between the inner sphere and the liquid nitrogen screen. The heat insulation piece is arranged in the heat insulation chamber. The application reduces the temperature difference with the external environment through the liquid nitrogen screen. The heat insulation piece is filled in the heat insulation chamber, so that the outer sphere, the liquid nitrogen screen and the heat insulation piece realize multi-layer coating of the inner sphere and liquid hydrogen from the outside to the inside. The plurality of connecting mechanisms support the liquid nitrogen screen and the inner sphere, reduce the risk of heat transfer to the inner sphere and liquid hydrogen, improve the stability and safety during liquid hydrogen storage, and reduce the loss of liquid hydrogen.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of liquid hydrogen spherical tanks, in particular to a liquid hydrogen storage spherical tank and a storage process thereof. BACKGROUND

[0002] The liquid hydrogen spherical tank is a spherical vacuum adiabatic pressure container specially used for large-scale storage of liquid hydrogen (LH2). Simply put, it is a huge, highly insulated spherical "thermos bottle", and the main purpose is to store a large amount of liquid hydrogen at extremely low temperature (boiling point -252.8°C).

[0003] The low-temperature liquid hydrogen storage technology realizes the liquefaction of gaseous hydrogen by compressing and further cooling it to below -253°C. This process not only significantly improves the hydrogen storage density, but also greatly reduces the volume.

[0004] At present, the existing technology liquid hydrogen is prone to evaporation when stored due to the large temperature difference between the low temperature and the external environment, thereby causing resource loss. SUMMARY

[0005] In order to reduce the loss of resources, the application provides a liquid hydrogen storage spherical tank and a storage process thereof.

[0006] In a first aspect, the application provides a liquid hydrogen storage spherical tank, which adopts the following technical scheme:

[0007] The liquid hydrogen storage spherical tank comprises an outer sphere, a liquid nitrogen screen, an inner sphere arranged from outside to inside, and a supporting mechanism, a plurality of connecting mechanisms, a heat insulation member, and a liquid conveying mechanism.

[0008] The supporting mechanism is used for supporting and positioning the outer sphere, the liquid nitrogen screen is arranged on the inner side wall of the outer sphere, the plurality of connecting mechanisms are arranged on the inner sphere and connected with the outer sphere through the liquid nitrogen screen to support and position the liquid nitrogen screen and the inner sphere, the inner sphere is used for storing liquid hydrogen and cooperates with the liquid nitrogen screen to form a heat insulation chamber for heat insulation, the heat insulation member is arranged in the heat insulation chamber and realizes heat insulation, and the liquid conveying mechanism is arranged on the inner sphere and passes through the liquid nitrogen screen and the outer sphere and is used for inputting or outputting liquid hydrogen.

[0009] By adopting the above technical scheme, the supporting mechanism supports and positions the outer sphere, the liquid nitrogen screen is fixedly installed on the inner side wall of the outer sphere, the connecting mechanism is fixedly installed on the inner sphere, the inner sphere is hoisted and transported to the inner side of the liquid nitrogen screen, the plurality of connecting mechanisms are fixedly installed on the inner side wall of the outer sphere through the liquid nitrogen screen, so as to fix the liquid nitrogen screen and the inner sphere to the outer sphere, a heat insulation chamber is formed between the inner sphere and the liquid nitrogen screen, the heat insulation member is filled in the heat insulation chamber, and the liquid conveying mechanism inputs or outputs liquid hydrogen to the inner sphere.

[0010] The temperature of the liquid nitrogen shield is -164 degrees, and the temperature of the liquid hydrogen is -253 degrees, and the ambient temperature is certain, so as to reduce the temperature difference with the ambient environment, and the heat insulation member is filled in the heat insulation chamber, so that the outer sphere, the liquid nitrogen shield and the heat insulation member from the outside to the inside realize multi-layer covering of the inner sphere and the liquid hydrogen, so as to greatly reduce the risk of evaporation of the liquid hydrogen, and the connection of the outer sphere and the inner sphere is realized through the plurality of connecting mechanisms, so that the plurality of connecting mechanisms can support the liquid nitrogen shield and the inner sphere, and also greatly reduce the risk of heat transfer to the inner sphere and the liquid hydrogen, thereby improving the stability and safety during storage, and reducing the loss of liquid hydrogen.

[0011] Optionally, the heat insulation member is formed by filling glass beads in the heat insulation chamber after vacuumizing the heat insulation chamber.

[0012] By adopting the above technical scheme, the heat insulation member is formed by filling glass beads in the heat insulation chamber after vacuumizing the heat insulation chamber, so as to further reduce the risk of heat transfer and further reduce the loss of liquid hydrogen.

[0013] Optionally, the connecting mechanism comprises:

[0014] The connecting plate one and the connecting plate two are arranged on the inner side wall of the outer sphere and the outer side wall of the inner sphere through the rotating assembly, so that the connecting plate one is rotatably and detachably connected with the outer sphere, and the connecting plate two is rotatably and detachably connected with the inner sphere.

[0015] The connecting rod assembly is in an elongated structure and is arranged on the connecting plate two and passes through the liquid nitrogen shield to be connected with the connecting plate one.

[0016] By adopting the above technical scheme, the connecting plate one and the connecting plate two are respectively arranged on the outer sphere and the inner sphere, the connecting rod assembly is arranged on the connecting plate two, the connecting plate two is fixedly installed on the inner sphere, the connecting rod assembly passes through the liquid nitrogen shield to be connected with the connecting plate one, and the connecting plate one and the inner side wall of the outer sphere are fixedly connected, so as to realize the fixed installation of the inner sphere on the outer sphere and support the liquid nitrogen shield.

[0017] At the same time, the connecting rod assembly is in an elongated structure, so as to further reduce the heat transfer effect, improve the stability and safety during storage, and further reduce the loss of liquid hydrogen.

[0018] Optionally, the connecting rod assembly comprises:

[0019] The pull rod and the screw rod are threadedly connected at opposite ends on the connecting plate one and the connecting plate two, respectively.

[0020] The elastic joint is threadedly connected at an opposite end of the pull rod and the screw rod.

[0021] By adopting the technical scheme, one end of the pull rod is threadedly connected to the connecting plate one through the liquid nitrogen screen, the screw rod is threadedly connected to the connecting plate two, the tension joint is threadedly connected to the screw rod, the other end of the pull rod is threadedly connected to the tension joint, thereby realizing the fixed connection of the connecting plate one and the connecting plate two, sequentially installing multiple connecting rod assemblies, and fixing and installing the inner sphere on the outer sphere, while the pull rod supports and positions the liquid nitrogen screen, thereby realizing the installation of the inner sphere on the outer sphere and supporting and positioning the liquid nitrogen screen, and the elongated pull rod, the tension joint and the screw rod reduce the heat transfer effect and the loss of liquid hydrogen.

[0022] Meanwhile, the rotating assembly realizes the rotation and detachable connection of the connecting plate one and the connecting plate two with the outer sphere and the inner sphere respectively, so that the pull rod and the screw rod are threadedly connected to the connecting plate one and the connecting plate two respectively, and then the connecting plate one and the connecting plate two are fixedly installed on the outer sphere and the inner sphere respectively, so that the thread parts can be fully connected when the pull rod and the connecting plate one and the screw rod and the connecting plate two are threadedly connected, without the need of existing a part of non-connection for giving way, thereby greatly improving the stability and safety of liquid hydrogen storage.

[0023] Optionally, a threaded hole is formed in the outer side wall of the tension joint, a positioning member is formed in the inner side wall of the tension joint and located at the screw hole, the screw rod is threadedly connected to the tension joint, and the opposite end of the screw rod abuts against the positioning member for positioning and is provided with a positioning groove, and the threaded hole is threadedly connected with a positioning screw which is inserted and installed in the two positioning grooves and positions the pull rod and the screw rod.

[0024] By adopting the technical scheme, the screw rod is threadedly connected to the tension joint and abuts against the positioning member for positioning, the pull rod is threadedly connected to the other end of the tension joint and abuts against the other side wall of the positioning member for positioning, and the positioning screw is twisted and inserted into the two positioning grooves, so that the pull rod and the screw rod are blocked by the positioning screw and cannot be rotated after being rotated, thereby realizing the positioning of the positions of the pull rod and the screw rod, reducing the risk of disconnection of the pull rod and the screw rod from the tension joint, the connecting plate one and the connecting plate two, and when disassembly is needed, the positioning screw is twisted and separated from the positioning groove, and then the pull rod and the screw rod can be rotated for disassembly. The structure is simple and stable, and the stability, safety, convenience during installation and disassembly of the stored liquid hydrogen are improved.

[0025] Optionally, a rotating groove is formed in the connecting plate one, and the rotating assembly comprises:

[0026] a fixed plate which is arranged on the outer sphere and extends into the rotating groove;

[0027] a fixed pin which penetrates through the connecting plate one and the fixed plate and abuts against the fixed plate for positioning;

[0028] a positioning pin which is inserted and installed on the fixed pin and blocks the fixed pin from being separated from the connecting plate one and the fixed plate.

[0029] By adopting the technical scheme, the connecting plate one extends into the rotating groove, the fixing pin extends through the connecting plate one and the fixing plate to the outside of the connecting plate one, and then the positioning pin is inserted and installed on the fixing pin to be positioned, so that the positioning pin is positioned against the connecting plate one, thereby blocking the fixing pin from being separated from the connecting plate one and the fixing plate, and meanwhile, the positioning pin does not contact the fixing plate, so that the arrangement of the positioning pin does not interfere with the rotation of the fixing plate and the connecting plate one.

[0030] Optionally, the infusion mechanism comprises:

[0031] The liquid inlet pipe is arranged at the bottom of the outer sphere, extends through the heat insulation chamber and the top of the inner sphere, and extends to the inner bottom wall of the inner sphere.

[0032] The liquid outlet pipe is arranged at the bottom of the outer sphere, extends through the heat insulation chamber, and communicates with the bottom of the inner sphere. The liquid outlet pipe is provided with a bending buffer portion which is inclined upward and then inclined downward. The glass beads in the heat insulation chamber are wrapped on the liquid inlet pipe, the liquid outlet pipe and the bending buffer portion.

[0033] By adopting the technical scheme, the liquid inlet pipe and the liquid outlet pipe are both located below the outer sphere, so that they are convenient to connect with the pipeline and subsequent maintenance, and the convenience of equipment operation and maintenance is improved. Meanwhile, the liquid inlet pipe extends through the heat insulation chamber and the top of the inner sphere to the inner bottom wall of the inner sphere, so that the liquid moves upward under the action of pressure to enter the inner sphere, and then the liquid hydrogen directly flows into the inner sphere under the action of gravity, thereby facilitating the subsequent entry of the liquid hydrogen, reducing the risk of the liquid hydrogen moving out of the inner sphere under the action of gravity, improving the convenience of loading the liquid hydrogen, and reducing the risk of the liquid hydrogen colliding with the inner sphere to generate heat when moving downward. In addition, the above design also makes the length of the liquid inlet pipe in the heat insulation chamber longer, thereby greatly reducing the risk of heat being transmitted to the inner sphere through the liquid inlet pipe, and thus improving the convenience of loading the liquid hydrogen and reducing the loss of the liquid hydrogen.

[0034] The liquid outlet pipe extends through the heat insulation chamber and the bottom of the inner sphere to communicate, so that the liquid in the inner sphere can be discharged under the action of gravity when the liquid outlet pipe is opened, thereby improving the convenience of discharging the liquid hydrogen. In addition, the bending buffer portion is arranged to buffer the liquid hydrogen when flowing, thereby reducing the impact force, protecting the equipment safety, prolonging the service life, and also prolonging the length of the liquid outlet pipe in the heat insulation chamber, thereby reducing the risk of heat being transmitted to the inner sphere through the liquid outlet pipe, and thus improving the convenience of discharging the liquid hydrogen and reducing the loss of the liquid hydrogen.

[0035] Optionally, the outer sphere and the liquid nitrogen screen are both combined and assembled by a plurality of arc-shaped spherical structures. The top of the outer sphere is provided with a BOG port, and the BOG port is provided with a hydrogen reflux device for evaporation to communicate with the liquefaction equipment.

[0036] By adopting the technical scheme, the outer sphere and the liquid nitrogen screen are both spliced by multiple arc-shaped structures, so that the equipment can be transported to the installation site by a vehicle and then installed by hoisting, thereby greatly improving the convenience and safety of equipment installation. The BOG port guides the evaporated hydrogen to the external liquefaction equipment for liquefaction, and the liquefaction equipment timely delivers the liquefied liquid hydrogen to the inner sphere for replenishment, thereby further reducing the loss of liquid hydrogen.

[0037] Optionally, the support mechanism comprises:

[0038] A plurality of struts are arranged on the ground and connected to the outer sidewall of the outer sphere.

[0039] A plurality of diagonal braces are arranged on adjacent two struts and cross each other.

[0040] By adopting the technical scheme, the plurality of struts are used to support and position the outer sphere, and the plurality of diagonal braces further improve the support effect of the outer sphere and improve the stability during liquid hydrogen storage.

[0041] Optionally, the outer sphere is provided with an inspection mechanism, and the inspection mechanism comprises:

[0042] An inspection staircase is connected to the outer sphere in an upward and inclined manner.

[0043] An inspection platform is arranged on the top of the outer sphere.

[0044] A connecting staircase is arranged on the inspection staircase and connected to the inspection platform in a spiral upward manner.

[0045] By adopting the technical scheme, the outer surface and the top of the outer sphere can be inspected, thereby improving the convenience during equipment inspection.

[0046] In a second aspect, the application provides a storage process, which adopts the following technical scheme:

[0047] A storage process comprises the following steps:

[0048] Transporting the required materials to the installation site:

[0049] Installing the support mechanism, hoisting and splicing the outer sphere on the support mechanism, hoisting and fixing the liquid nitrogen screen to the inner sidewall of the outer sphere, and fixing and installing the connecting mechanism to the inner sidewall of the inner sphere, the connecting mechanism being fixedly connected to the outer sphere through the liquid nitrogen screen;

[0050] Pumping the heat insulation chamber to vacuum, and then filling the glass beads into the heat insulation chamber;

[0051] Inputting liquid hydrogen, inputting the liquid hydrogen into the inner sphere through the liquid input mechanism, and outputting the liquid hydrogen through the liquid input mechanism during use.

[0052] By adopting the technical scheme, the required material is transported to the installation site, a supporting mechanism is installed, the spliced outer sphere is hoisted on the supporting mechanism, the liquid nitrogen screen is hoisted and fixedly installed on the inner side wall of the outer sphere, and the connecting mechanism is fixedly installed on the inner side wall of the inner sphere, the connecting mechanism is fixedly connected with the outer sphere through the liquid nitrogen screen; the heat insulation chamber is vacuumized, and then the glass beads are filled into the heat insulation chamber; the liquid hydrogen is input into the inner sphere through the liquid delivery mechanism, and the liquid hydrogen is output through the liquid delivery mechanism in use, so that the stability during liquid hydrogen storage is improved, and the loss of the liquid hydrogen is reduced.

[0053] To sum up, the present application has at least one of the following beneficial technical effects:

[0054] 1. The temperature difference with the external environment is reduced by the liquid nitrogen screen, and the heat insulation member is filled in the heat insulation chamber, so that the outer sphere, the liquid nitrogen screen and the heat insulation member realize multi-layer covering of the inner sphere and the liquid hydrogen from the outside to the inside, so that the risk of evaporation of the liquid hydrogen can be greatly reduced, and the multiple connecting mechanisms can support the liquid nitrogen screen and the inner sphere, and can greatly reduce the risk of heat transfer to the inner sphere and the liquid hydrogen, so that the stability and safety during storage are improved, and the loss of the liquid hydrogen is reduced.

[0055] 2. The connecting plate one and the connecting plate two are respectively rotatable and detachable with the outer sphere and the inner sphere through the rotating assembly, the pull rod and the screw rod are respectively threadedly connected to the connecting plate one and the connecting plate two, and then the connecting plate one and the connecting plate two are respectively fixedly installed on the outer sphere and the inner sphere, so that the threaded parts can be completely connected when the pull rod and the screw rod are threadedly connected with the connecting plate one and the connecting plate two, without the need of part connection for accommodation, and the convenience during connection is improved, so that the stability and safety during liquid hydrogen storage are greatly improved.

[0056] 3. The pull rod and the screw rod are positioned against the positioning member, and the positioning screw is inserted and installed into the two positioning grooves by being screwed, so as to position the positions of the pull rod and the screw rod, and reduce the risk of disengagement of the pull rod and the screw rod from the elastic joint, the connecting plate one and the connecting plate two, when disassembly is needed, the positioning screw is disengaged from the positioning groove by being screwed, and then the pull rod and the screw rod can be rotated for disassembly, so that the stability, safety during liquid hydrogen storage, and convenience during installation and disassembly are improved. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 is a plan view of the liquid hydrogen storage spherical tank;

[0058] Figure 2 is a partial plan view of the liquid hydrogen storage spherical tank;

[0059] Figure 3 is a cross-sectional view of A-A in Figure 2

[0060] ​Figure 4 is a schematic diagram of the connecting structure between the tension joint, pull rod and screw rod in the liquid hydrogen storage spherical tank;

[0061] Figure 5 is a local plane schematic diagram of the liquid hydrogen storage spherical tank, mainly showing the liquid input mechanism.

[0062] Fig. 11, outer sphere; 12, liquid nitrogen screen; 13, inner sphere; 14, heat insulation piece; 15, heat insulation chamber; 2, support mechanism; 21, support column; 22, inclined strut; 3, connecting mechanism; 31, connecting plate one; 32, connecting plate two; 33, threaded groove one; 34, threaded groove two; 35, rotating groove; 4, connecting rod assembly; 41, pull rod; 42, screw rod; 43, tension joint; 44, positioning piece; 45, threaded hole; 46, positioning screw; 47, positioning groove; 48, threaded part; 49, gripping part; 5, liquid input mechanism; 51, liquid inlet pipe; 52, liquid outlet pipe; 53, bending buffer part; 54, corrugated pipe; 6, maintenance mechanism; 61, maintenance staircase; 62, maintenance platform; 63, connecting staircase; 7, rotating assembly; 71, fixed plate; 72, fixed pin; 73, positioning pin. DETAILED DESCRIPTION

[0063] The present application is further described below.

[0064] The present application discloses a liquid hydrogen storage spherical tank and a storage process thereof.

[0065] Referring to Figure 1 and Figure 2 , the liquid hydrogen storage spherical tank comprises an outer sphere 11, a liquid nitrogen screen 12 and an inner sphere 13 arranged from outside to inside, further comprises a support mechanism 2, a plurality of connecting mechanisms 3, a heat insulation piece 14 and a liquid input mechanism 5. The support mechanism 2 is used for supporting the outer sphere 11, and the liquid nitrogen screen 12 is arranged on the inner side wall of the outer sphere 11. The plurality of connecting mechanisms 3 are arranged on the outer sphere 11, and are connected with the inner sphere 13 through the liquid nitrogen screen 12, and are used for supporting and positioning the liquid nitrogen screen 12 and the inner sphere 13. The inner sphere 13 is used for storing liquid hydrogen and cooperates with the liquid nitrogen screen 12 to form a heat insulation chamber 15 for heat insulation. The heat insulation piece 14 is arranged in the heat insulation chamber 15 and is used for heat insulation. The liquid input mechanism 5 is arranged on the inner sphere 13, passes through the liquid nitrogen screen 12 and the outer sphere 11, and is used for inputting or outputting liquid hydrogen.

[0066] The support mechanism 2 comprises a plurality of support columns 21 and a plurality of inclined struts 22. The plurality of support columns 21 are arranged horizontally and spaced apart, and are in a vertical state. The top of each support column 21 is fixedly connected with the side wall of the outer sphere 11. The plurality of inclined struts 22 are in an inclined state, and two ends of each inclined strut 22 are fixedly connected with two adjacent support columns 21. The inclined struts 22 located on two support columns 21 are in a cross shape, so that the plurality of support columns 21 are connected integrally, thereby improving the stability of the outer sphere 11.

[0067] The connecting mechanism 3 comprises the connecting plate one 31 and the connecting plate two 32, and the connecting rod assembly 4. The connecting plate one 31 and the connecting plate two 32 are connected to the inner side wall of the outer sphere 11 and the outer side wall of the inner sphere 13 through the rotating assembly 7, so that the connecting plate one 31 is rotatably and detachably connected to the outer sphere 11, and the connecting plate two 32 is rotatably and detachably connected to the inner sphere 13. The two rotating assemblies 7 are the same in structure, and the rotating assembly 7 on the connecting plate one 31 is taken as an example for description.

[0068] Referring to Figure 2 and Figure 3 , the connecting plate one 31 is provided with a rotating groove 35 close to one end of the outer sphere 11. The rotating assembly 7 comprises a fixed plate 71, a fixed pin 72 and a positioning pin 73. The fixed plate 71 is fixedly installed on the inner side wall of the outer sphere 11, and extends into the rotating groove 35. The fixed pin 72 penetrates through the connecting plate one 31 and the fixed plate 71, extends to the outside of the connecting plate one 31, and is positioned by abutting against the connecting plate one 31. The fixed pin 72 is rotatably connected to the connecting plate one 31 and the fixed plate 71. The positioning pin 73 is insertedly installed on the fixed pin 72, is positioned by abutting against the connecting plate one 31, and blocks the movement of the fixed pin 72.

[0069] The connecting plate one 31 and the connecting plate two 32 are respectively provided with a threaded groove one 33 and a threaded groove two 34 on the opposite two side walls. The axes of the threaded groove one 33 and the threaded groove two 34 are perpendicular to the axis of the fixed pin 72. The connecting rod assembly 4 is in an elongated structure, is arranged on the connecting plate one 31, and is connected to the connecting plate two 32 through the liquid nitrogen screen 12.

[0070] Referring to Figures 2-4 , the connecting rod assembly 4 comprises a pull rod 41 and a screw rod 42, and a tension joint 43. The tension joint 43 is in a tubular structure, is internally provided with a screw thread, is coaxially fixedly installed with an arc-shaped positioning member 44 on the inner side wall, is provided with a threaded hole 45 corresponding to the positioning member 44 on the outer side wall, and the threaded hole 45 is located on one side of the positioning member 44. The axis of the threaded hole 45 is perpendicular to the axis of the tension joint 43 and is in communication with the inside of the tension joint 43. The threaded hole 45 is threadedly connected with a positioning screw 46 which can extend into the tension joint 43.

[0071] The pull rod 41 and the screw rod 42 are the same in structure, and both are provided with a threaded portion 48 with threads at both ends and a holding portion 49 for rotation at the middle portion, the holding portion 49 has an outer diameter larger than the maximum diameter of the threaded portion 48, the pull rod 41 and the screw rod 42 are threadedly connected with the threaded groove one 33 and the threaded groove two 34 at the ends away from each other, and the ends close to each other of the pull rod 41 and the screw rod 42 are threadedly connected to the inner side walls at both ends of the elastic joint 43 and abut on the positioning member 44 for positioning, the ends abutting on the positioning member 44 of the pull rod 41 and the screw rod 42 are both provided with an arc-shaped positioning groove 47, the positioning screw 46 extends to the two positioning grooves 47 and blocks the rotation of the screw rod 42, and the pull rod 41, the screw rod 42 and the elastic joint 43 form an integral whole and cannot rotate relative to each other, thereby improving the stability of the connection.

[0072] First, the pull rod 41 and the screw rod 42 are threadedly connected to the inner side walls at both ends of the elastic joint 43, and until the ends of the pull rod 41 and the screw rod 42 abut on the two side walls of the positioning member 44 for positioning, at this time, the positioning grooves 47 at the ends of the pull rod 41 and the screw rod 42 are aligned with the threaded holes 45, and the positioning screw 46 is screwed and installed into the positioning grooves 47 and abuts on the positioning member 44 for positioning.

[0073] The screw rod 42 is threadedly connected to the threaded groove two 34 and abuts on the groove bottom of the threaded groove two 34, the pull rod 41 is threadedly connected to the threaded groove one 33 and abuts on the groove bottom of the threaded groove one 33, the connecting plate one 31 and the connecting plate two 32 are close to the two fixed plates 71, so that the two fixed plates 71 extend into the two rotating grooves 35, then the fixed pin 72 passes through the connecting plate one 31 and the fixed plate 71, and the positioning pin 73 is inserted and installed on the fixed pin 72 for positioning.

[0074] The outer sphere 11 and the liquid nitrogen screen 12 are both combined and assembled by a plurality of arc-shaped spherical structures, so that all the required materials are delivered to the installation site by a vehicle, and then combined and assembled to be completed, and the connection mode adopts the connection structure in the prior art, which will not be described here. During assembly, the outer sphere 11 is first assembled and fixed, but part of it is not assembled, so as to facilitate the staff to fix and install a plurality of liquid nitrogen screens 12 on the inner side wall of the outer sphere 11, so that the plurality of liquid nitrogen screens 12 are assembled with each other, and the liquid nitrogen screens 12 are not completely assembled during assembly, and space is left for hoisting and placing the inner sphere 13 into the inner side of the liquid nitrogen screen 12, so that the complete installation of the outer sphere 11 and the liquid nitrogen screen 12 is finally completed, and the inner sphere 13 is fixedly connected with the outer sphere 11 through the plurality of connecting mechanisms 3.

[0075] The installation sequence of the connecting mechanism 3 can be adjusted as needed, and the two fixed plates 71 are rotatably connected with the first connecting plate 31 and the second connecting plate 32, so that the above installation sequence is more flexible and can be installed by rotating, improving the convenience and stability of installation. In order to facilitate the installation of the connecting mechanism 3, the liquid nitrogen screen 12 structure through which the pull rod 41 passes can be fixed with the outer sphere 11 after the installation of the connecting mechanism 3 is completed, so that the liquid nitrogen screen 12 can move during the installation of the connecting mechanism 3, improving the convenience of installation of the connecting mechanism 3.

[0076] After the installation of a single connecting mechanism 3 is completed, the connection of multiple connecting mechanisms 3 is repeatedly implemented, and the multiple connecting mechanisms 3 fixedly connect the inner sphere 13 and the outer sphere 11. When the pull rod 41 passes through the liquid nitrogen screen 12, the liquid nitrogen screen 12 can also be positioned, and the heat transfer effect can be reduced through the elongated pull rod 41, the elastic joint 43 and the screw rod 42, thereby reducing the loss of liquid hydrogen.

[0077] Referring to Figure 1 , Figure 2 , Figure 5 The infusion mechanism 5 includes a liquid inlet pipe 51 and a liquid outlet pipe 52. The liquid inlet pipe 51 is fixedly installed at the bottom of the outer sphere 11 and vertically upwardly passes through the liquid nitrogen screen 12 and the heat insulation chamber 15 in sequence. The liquid inlet pipe 51 is then moved along the heat insulation chamber 15 to the top of the inner sphere 13. After passing through the top of the inner sphere 13, the liquid inlet pipe 51 vertically downwardly extends to the inner bottom wall of the inner sphere 13. The inner bottom wall of the inner sphere 13 is fixedly installed with a positioning plate for positioning the bottom end of the liquid inlet pipe 51.

[0078] The liquid inlet pipe 51 is used to connect with an external liquefaction device to realize the input of liquid hydrogen. The liquid outlet pipe 52 is fixedly installed at the bottom of the outer sphere 11 and vertically upwardly passes through the liquid nitrogen screen 12 and the heat insulation chamber 15 in sequence. The liquid outlet pipe 52 is fixedly connected with the bottom of the inner sphere 13 after passing through the heat insulation chamber 15 and communicates with the inside of the inner sphere 13. Meanwhile, an inclined upward and then downward bent buffer portion 53 is arranged on the liquid outlet pipe 52 in the heat insulation chamber 15. The liquid outlet pipe 52 is used to connect with an external pipeline to realize the output of liquid hydrogen. Valves for controlling opening and closing are fixedly installed on the liquid inlet pipe 51 and the liquid outlet pipe 52. Corrugated pipes 54 for buffering are fixedly installed at the bottom ends of the liquid inlet pipe 51 and the liquid outlet pipe 52.

[0079] The liquid inlet pipe 51 and the liquid outlet pipe 52 are both located below the outer sphere 11, so that they are convenient to connect with the pipeline and subsequent maintenance; meanwhile, the liquid inlet pipe 51 passes through the heat insulation chamber 15, and the liquid inlet pipe 51 passes through the top of the inner sphere 13 and extends to the inner bottom wall of the inner sphere 13, so that after the liquid moves upward into the inner sphere 13 under the action of pressure, the liquid hydrogen directly moves to the bottom of the inner sphere 13 under the action of gravity, thereby facilitating the subsequent input of liquid hydrogen, reducing the risk of liquid hydrogen in the inner sphere 13 moving out under the action of gravity, and the above design also makes the length of the liquid inlet pipe 51 in the heat insulation chamber 15 longer, thereby greatly reducing the risk of heat being transferred to the inner sphere 13 through the liquid inlet pipe 51.

[0080] The liquid outlet pipe 52 passes through the heat insulation chamber 15 and the bottom of the inner sphere 13 to communicate, so that after the liquid outlet pipe 52 is opened, the liquid in the inner sphere 13 can be discharged under the action of gravity, and through the arrangement of the bending buffer part 53, the liquid hydrogen flows and is buffered, reducing the impact force, protecting the equipment safety, prolonging the service life, and also prolonging the length of the liquid outlet pipe 52 in the heat insulation chamber 15, thereby reducing the risk of heat being transferred to the inner sphere 13 through the liquid outlet pipe 52.

[0081] The BOG port is fixedly installed on the top of the outer sphere 11, and the BOG port is provided with a liquefied equipment communication port for communicating with the liquid inlet pipe 51, the BOG port guides the evaporated hydrogen to the liquefied equipment for re-liquefaction, and then the liquefied equipment returns the liquid hydrogen to the inner sphere 13 through the liquid inlet pipe 51, thereby reducing the loss of liquid hydrogen.

[0082] The heat insulation part 14 is formed by filling glass beads in the heat insulation chamber 15, and the outer sphere 11 is fixedly installed with a vacuum pipe communicating with the heat insulation chamber 15, the outer sphere 11, the liquid nitrogen screen 12 and the fixed inner sphere 13 are assembled at the same time, and the liquid delivery mechanism 5 and other pipelines are installed, and the installation method adopts the method in the prior art; after the heat insulation chamber 15 is formed by cooperating between the liquid nitrogen screen 12 and the inner sphere 13, the heat insulation chamber 15 is vacuumized through the vacuum pipe, and then the glass beads are filled into the heat insulation chamber 15, and the glass beads also coat the liquid inlet pipe 51 and the liquid outlet pipe 52 in the heat insulation chamber 15, thereby reducing the risk of heat being transferred to the inner sphere 13 and the liquid hydrogen.

[0083] Referring to Figure 1 The sphere is provided with an inspection mechanism 6, the inspection mechanism 6 includes an inspection staircase 61, an inspection platform 62 and a connecting staircase 63, the bottom end of the inspection staircase 61 is supported on the ground, and the top end of the inspection staircase 61 is inclined upward and fixedly installed on the outer side wall at the middle position of the outer sphere 11, for detecting and maintaining the outer side wall of the outer sphere 11.

[0084] The maintenance platform 62 is fixedly installed on the top of the outer sphere 11, and the maintenance platform 62 is formed with a space for installing the liquid delivery mechanism 5, and the maintenance platform 62 is used for detecting and maintaining the structure of the top of the outer sphere 11; the connecting stairs 63 are fixedly installed on the top of the maintenance stairs 61 and are connected with the detection platform after spirally upward, so that the workers can better realize the maintenance of the equipment, and the maintenance stairs 61, the maintenance platform 62 and the connecting stairs 63 are prefabricated and are transported to the installation site for installation.

[0085] The working principle of the embodiment of the application is as follows:

[0086] The required materials are all transported to the installation site, the support mechanism 2 is first fixedly installed on the ground, then the outer sphere 11 and the liquid nitrogen screen 12 are hoisted and assembled on the support mechanism 2, the inner sphere 13 is hoisted and transported to the inner side of the liquid nitrogen screen 12, the connecting mechanism 3 is fixedly installed on the inner sphere 13, then the connecting mechanism 3 is fixedly connected with the outer sphere 11 after passing through the liquid nitrogen screen 12, the liquid nitrogen screen 12 is fixedly connected with the inner wall of the outer sphere 11, so that the outer sphere 11, the liquid nitrogen screen 12 and the inner sphere 13 are assembled, the heat insulation chamber 15 is vacuumized, then the glass beads are filled into the heat insulation chamber 15, so that the glass beads simultaneously cover and insulate the liquid inlet pipe 51 and the liquid outlet pipe 52, and the maintenance mechanism 6 is fixedly installed on the outer sphere 11.

[0087] The temperature of the liquid nitrogen screen 12 is-164 degrees, the temperature of the liquid hydrogen is-253 degrees, and the temperature of the external environment is certain, so that the temperature difference between the external environment and the liquid hydrogen can be reduced, the heat insulation piece 14 is filled in the heat insulation chamber 15, so that the outer sphere 11, the liquid nitrogen screen 12 and the heat insulation piece 14 from the outside to the inside cover the inner sphere 13 and the liquid hydrogen, the risk of evaporation of the liquid hydrogen can be greatly reduced, and the plurality of connecting mechanisms 3 realize the connection of the outer sphere 11 and the inner sphere 13, so that the plurality of connecting mechanisms 3 can support the inner sphere 13 while greatly reducing the risk of heat transfer to the inner sphere 13 and the liquid hydrogen, and the connecting mechanism 3 can support the liquid nitrogen screen 12 when passing through the liquid nitrogen screen 12, so that the stability and safety of storage can be improved, and the loss of the liquid hydrogen can be reduced.

[0088] The embodiment of the application discloses a storage process.

[0089] Referring to Figures 1-2 , the storage process comprises the following steps:

[0090] The required materials are transported to the installation site:

[0091] The support mechanism 2 is installed, the outer sphere 11 is hoisted and spliced on the support mechanism 2, the liquid nitrogen screen 12 is hoisted and fixedly installed on the inner side wall of the outer sphere 11, and the connecting mechanism 3 is fixedly installed on the inner side wall of the inner sphere 13, and the connecting mechanism 3 is fixedly connected with the outer sphere 11 through the liquid nitrogen screen 12;

[0092] The heat insulation chamber 15 is vacuumized, and then the glass beads are filled into the heat insulation chamber 15.

[0093] The liquid hydrogen is input into the inner sphere 13 through the liquid input mechanism 5, and the liquid hydrogen is output through the liquid input mechanism 5 when used.

[0094] The working principle of the embodiment of the application is as follows:

[0095] The required materials are transported to the installation site, the support mechanism 2 is installed, the outer sphere 11 is hoisted and spliced on the support mechanism 2, the liquid nitrogen screen 12 is hoisted and fixedly installed on the inner side wall of the outer sphere 11, and the connecting mechanism 3 is fixedly installed on the inner side wall of the inner sphere 13, and the connecting mechanism 3 is fixedly connected with the outer sphere 11 through the liquid nitrogen screen 12; the heat insulation chamber 15 is vacuumized, and then the glass beads are filled into the heat insulation chamber 15; the liquid hydrogen is input into the inner sphere 13 through the liquid input mechanism 5, and the liquid hydrogen is output through the liquid input mechanism 5 when used, which can improve the stability and safety during storage, and reduce the loss of liquid hydrogen.

[0096] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A liquid hydrogen storage sphere, characterized by: It comprises an outer sphere (11), a liquid nitrogen screen (12), an inner sphere (13) arranged from outside to inside, a supporting mechanism (2), a plurality of connecting mechanisms (3), a heat insulation member (14), and a liquid delivery mechanism (5); The supporting mechanism (2) is used for supporting and positioning the outer sphere (11), the liquid nitrogen screen (12) is arranged on the inner side wall of the outer sphere (11), the plurality of connecting mechanisms (3) are arranged on the inner sphere (13) and connected with the outer sphere (11) through the liquid nitrogen screen (12) to support and position the liquid nitrogen screen (12) and the inner sphere (13), the inner sphere (13) is used for storing liquid hydrogen and cooperates with the liquid nitrogen screen (12) to form a heat insulation chamber (15) for heat insulation, the heat insulation member (14) is arranged in the heat insulation chamber (15) and realizes heat insulation, and the liquid delivery mechanism (5) is arranged on the inner sphere (13) and passes through the liquid nitrogen screen (12) and the outer sphere (11) and is used for inputting or outputting liquid hydrogen. The connecting mechanism (3) comprises: A connecting plate one (31) and a connecting plate two (32) are arranged on the inner side wall of the outer sphere (11) and the outer side wall of the inner sphere (13) through a rotating assembly (7), so that the connecting plate one (31) is rotatably and detachably connected with the outer sphere (11), and the connecting plate two (32) is rotatably and detachably connected with the inner sphere (13); A connecting rod assembly (4) is in an elongated structure and is arranged on the connecting plate two (32) and connected with the connecting plate one (31) through the liquid nitrogen screen (12); The connecting rod assembly (4) comprises: A pull rod (41) and a screw rod (42) are threadedly connected at opposite ends of the connecting plate one (31) and the connecting plate two (32), respectively; A tension joint (43) is threadedly connected at opposite ends of the pull rod (41) and the screw rod (42); A threaded hole (45) is formed in the outer side wall of the tension joint (43), a positioning member (44) is arranged on the inner side wall of the tension joint (43) and located at the threaded hole (45), after the opposite ends of the pull rod (41) and the screw rod (42) are threadedly connected to the tension joint (43), the opposite ends of the pull rod (41) and the screw rod (42) are positioned on the positioning member (44), and the opposite ends of the pull rod (41) and the screw rod (42) abutting the positioning member (44) are provided with positioning grooves (47), and the threaded hole (45) is threadedly connected with a positioning screw (46) which is inserted and mounted in the two positioning grooves (47) and positions the pull rod (41) and the screw rod (42).

2. A liquid hydrogen storage sphere according to claim 1, characterized in that: The heat insulation member (14) is formed by filling glass beads after the heat insulation chamber (15) is vacuumized.

3. A liquid hydrogen storage sphere according to claim 1, wherein: A rotating groove (35) is formed in the connecting plate one (31), and the rotating assembly (7) comprises: A fixed plate (71) is arranged on the outer sphere (11) and extends into the rotating groove (35); A fixed pin (72) passes through the connecting plate one (31) and the fixed plate (71) and is positioned on the fixed plate (71); A positioning pin (73) is inserted and mounted on the fixed pin (72) and blocks the fixed pin (72) from being separated from the connecting plate one (31) and the fixed plate (71).

4. The liquid hydrogen storage sphere of claim 1, wherein: The liquid delivery mechanism (5) comprises: Liquid inlet pipe (51) is arranged at the bottom of the outer sphere (11) and extends to the inner bottom wall of the inner sphere (13) through the heat insulation chamber (15) and the top of the inner sphere (13); Liquid outlet pipe (52) is arranged at the bottom of the outer sphere (11) and communicates with the bottom of the inner sphere (13) through the heat insulation chamber (15), and the liquid outlet pipe (52) is provided with a bending buffer part (53) which is inclined upward and then inclined downward; the glass beads in the heat insulation chamber (15) are coated on the liquid inlet pipe (51), the liquid outlet pipe (52) and the bending buffer part (53).

5. The liquid hydrogen storage sphere of claim 1, wherein: The outer sphere (11) and the liquid nitrogen screen (12) are assembled by a plurality of arc-shaped spherical structures; the top of the outer sphere (11) is provided with a BOG port for evaporated hydrogen to flow back to the liquefaction equipment connected with the liquid delivery mechanism (5).

6. The liquid hydrogen storage sphere of claim 1, wherein: The outer sphere (11) is provided with an inspection mechanism (6), which comprises: Inspection stairs (61) are inclined upward and connected with the outer sphere (11); Inspection platform (62) is arranged on the top of the outer sphere (11); Connecting stairs (63) are arranged on the inspection stairs (61) and connected with the inspection platform (62) after being spirally upward.

7. A storage process using the storage sphere according to any one of claims 1 to 6, characterized by: The steps include: Transport the required materials to the installation site: Install the support mechanism (2), hoist and splice the outer sphere (11) on the support mechanism (2), hoist and fix the liquid nitrogen screen (12) on the inner side wall of the outer sphere (11), and fix the connecting mechanism (3) on the inner side wall of the inner sphere (13), the connecting mechanism (3) is fixedly connected with the outer sphere (11) through the liquid nitrogen screen (12); The heat insulation chamber (15) is vacuumized, and then the glass beads are filled into the heat insulation chamber (15); Input liquid hydrogen, input liquid hydrogen into the inner sphere (13) through the liquid delivery mechanism (5), and output liquid hydrogen through the liquid delivery mechanism (5) when in use.

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