Liquid hydrogen storage device with liquid hydrogen pump and liquid hydrogen storage system

Abstract

The invention discloses a liquid hydrogen storage device with a liquid hydrogen pump and a liquid hydrogen storage system. The liquid hydrogen storage device with the liquid hydrogen pump comprises a liquid hydrogen jacket and a storage container; the liquid hydrogen jacket comprises a jacket inner wall and a jacket outer wall, a mounting space for mounting the liquid hydrogen pump is defined by the jacket inner wall, a jacket heat insulation space is defined by the jacket outer wall and the jacket inner wall, and a jacket opening is formed in the jacket heat insulation space; the storage container comprises a storage inner wall and a storage outer wall, the storage inner wall defines a liquid storage space, the storage outer wall is annularly arranged on the storage inner wall and defines a storage heat insulation space with the storage inner wall, the storage heat insulation space is provided with a heat insulation opening, and the heat insulation opening is directly communicated with the jacket opening; the liquid hydrogen jacket further comprises a heat insulation part arranged in the jacket heat insulation space and / or the storage heat insulation space. According to the liquid hydrogen storage device with the liquid hydrogen pump and the liquid hydrogen storage system, the liquid leakage amount of liquid hydrogen is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid hydrogen, in particular to a liquid hydrogen storage device provided with a liquid hydrogen pump and a liquid hydrogen storage system. BACKGROUND

[0002] Liquid hydrogen is more suitable for large-scale long-distance transportation than gaseous hydrogen, and liquid hydrogen is more suitable for storage in large hydrogen refueling stations. Liquid hydrogen has high hydrogen storage density, low storage and transportation cost, low storage pressure, and is also safer. The process flow of a liquid hydrogen storage type hydrogen refueling station generally includes a liquid hydrogen storage tank, a liquid hydrogen pump, a high-pressure vaporizer, a high-pressure gaseous hydrogen buffer tank, and a hydrogen refueling machine in order of material flow. The liquid hydrogen pump is installed in the liquid hydrogen storage tank.

[0003] The reciprocating liquid hydrogen pump of the prior art is divided into an external type and an immersion type. The external type liquid hydrogen pump is installed outside the liquid hydrogen storage tank and connected with the liquid hydrogen storage tank through a pipeline to realize the transportation of liquid hydrogen. The immersion type liquid hydrogen pump has a liquid force end for liquid hydrogen compression and transportation installed inside the storage tank and immersed in liquid hydrogen, and a driving end installed outside the liquid hydrogen storage tank. The immersion type liquid hydrogen pump greatly reduces the total evaporation loss of hydrogen, can instantly add hydrogen as needed, and is very suitable for cyclic operation with frequent start and stop within one hour.

[0004] At present, the part of the immersion type liquid hydrogen pump arranged in the liquid hydrogen storage tank is provided with a jacketed heat insulation space on the outside to reduce the heat leakage of the liquid hydrogen pump into the liquid hydrogen storage tank. The inventors found in the process of implementing the invention that the heat leakage of the liquid hydrogen pump and its heat insulation jacket accounts for more than 90% of the total heat leakage of liquid hydrogen, and the heat insulation performance of the liquid hydrogen pump and the heat insulation jacket needs to be optimized to reduce the heat leakage of liquid hydrogen. SUMMARY

[0005] The purpose of the technical scheme of the present application is to provide a liquid hydrogen storage device provided with a liquid hydrogen pump and a liquid hydrogen storage system to reduce the liquid leakage of liquid hydrogen.

[0006] The technical scheme of the present application provides a liquid hydrogen storage device provided with a liquid hydrogen pump, which comprises: a liquid hydrogen jacket and a storage container in communication; the liquid hydrogen jacket comprises a jacket inner wall and a jacket outer wall, the jacket inner wall defines a mounting space for mounting a liquid hydrogen pump, and the jacket outer wall is arranged on the outside of the jacket inner wall and defines a jacket heat insulation space with the jacket inner wall, and the jacket heat insulation space is provided with a jacket opening; the storage container comprises a storage inner wall and a storage outer wall, the storage inner wall defines a liquid storage space, and the storage outer wall is arranged on the storage inner wall and defines a storage heat insulation space with the storage inner wall, and the storage heat insulation space is provided with an insulation opening, and the insulation opening is in direct communication with the jacket opening; the liquid hydrogen jacket further comprises a heat insulation part arranged in the jacket heat insulation space and / or the storage heat insulation space.

[0007] Optionally, the heat insulation part further comprises a cooling screen, the cooling screen is arranged around the outside of the inner wall of the jacket, and the cooling screen and the inner wall of the jacket define a closed cooling screen space, and a cooling medium coil is arranged in the cooling screen space.

[0008] Optionally, the cooling medium in the cooling medium coil is liquid hydrogen, and a liquid hydrogen inlet pipe of the liquid hydrogen is connected to an outlet of the liquid hydrogen pump.

[0009] Optionally, the cooling screen extends to a portion of the inner wall of the jacket that is outside the storage container.

[0010] Optionally, the cooling screen further comprises an extension part extending towards the outer wall of the jacket.

[0011] Optionally, the heat insulation part further comprises a heat insulation assembly filled in the heat insulation space of the jacket, and the heat insulation assembly comprises radiation layers and spacing layers arranged at intervals in a direction parallel to the inner wall of the jacket.

[0012] Optionally, the liquid hydrogen jacket is at least two, the storage heat insulation space is provided with at least two heat insulation openings, and at least two jacket openings are connected to the at least two heat insulation openings in a one-to-one correspondence.

[0013] Optionally, the liquid hydrogen jacket is sleeve-shaped, the jacket opening is located at an end of the liquid hydrogen jacket, and the liquid hydrogen jacket is located outside the liquid storage space.

[0014] Optionally, the liquid hydrogen jacket is sleeve-shaped, the jacket opening is located on the side of the outer wall of the jacket, and the liquid hydrogen jacket at least partially extends into the liquid storage space.

[0015] Optionally, the inner wall of the jacket comprises a heat insulation section and an extension section, the heat insulation section and the outer wall of the jacket define the jacket heat insulation space, the extension section extends into the liquid storage space and is provided with a jacket bottom valve, and the jacket bottom valve is used to control the communication and isolation between the mounting space and the liquid storage space.

[0016] The application further provides a liquid hydrogen storage system, comprising a liquid hydrogen tank truck and the liquid hydrogen storage device provided with a liquid hydrogen pump according to any one of the above.

[0017] The above technical scheme has the following beneficial effects:

[0018] The liquid hydrogen storage device provided with the liquid hydrogen pump and the liquid hydrogen storage system have a jacket heat insulation space in communication with a storage heat insulation space, so that cold energy can be exchanged between the jacket heat insulation space and the storage heat insulation space, the heat insulation effect is improved, and the beneficial effects of integrated vacuumizing, maintenance and detection are achieved; the jacket heat insulation space in the liquid hydrogen jacket and / or the heat insulation part arranged in the storage heat insulation space are arranged in the jacket heat insulation space, so that the heat insulation effect of the jacket heat insulation space can be effectively improved, and the heat leakage of the liquid hydrogen pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of a liquid hydrogen storage device provided with a liquid hydrogen pump according to an embodiment of the present application;

[0020] Figure 2 FIG. 2 is a structural schematic view of a liquid hydrogen pump arranged in a mounting space according to an embodiment of the present application;

[0021] Figure 3 FIG. 3 is a structural schematic view of a liquid hydrogen storage device provided with a liquid hydrogen pump according to an embodiment of the present application;

[0022] Figure 4 FIG. 4 is a structural schematic view of a liquid hydrogen pump arranged in a mounting space according to an embodiment of the present application;

[0023] Figure 5 FIG. 5 is a structural schematic view of a liquid hydrogen pump arranged in a mounting space according to an embodiment of the present application;

[0024] Figure 6 FIG. 6 is a structural schematic view of a liquid hydrogen storage device provided with three liquid hydrogen jackets according to an embodiment of the present application.

[0025] LIST OF ELEMENTS

[0026] 1-liquid hydrogen pump, 10-liquid hydrogen pump flange;

[0027] 2-storage container, 20-storage container inner wall, 21-storage container outer wall, 22-storage heat insulation space, 23-liquid storage space;

[0028] 3-liquid hydrogen jacket, 30-mounting space, 31-jacket bottom valve, 32-jacket inner wall, 320-heat insulation section, 321-extension section, 33-jacket outer wall, 34-jacket heat insulation space, 35-jacket flange;

[0029] 4-inner wall expansion joint, 40-outer wall expansion joint;

[0030] 6-heat insulation part, 60-cooling medium coil, 61-cooling screen, 62-extension part. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be further described in combination with the drawings.

[0032] It is easy to understand that, according to the technical solutions of the present application, various structural modes and implementation modes that can be replaced by those skilled in the art without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solutions of the present application, and should not be considered as the whole or as a limitation or restriction on the technical solutions of the present application.

[0033] In this specification, the orientation terms mentioned or possibly mentioned, such as up, down, left, right, front, back, front, back, top, bottom, etc., are defined with respect to the structure shown in the drawings, and they are relative concepts, so they can be changed accordingly according to their different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0034] The present application provides a liquid hydrogen storage device provided with a liquid hydrogen pump, comprising: a liquid hydrogen jacket 3 and a storage container 2 in communication.

[0035] The liquid hydrogen jacket 3 comprises a jacket inner wall 32 and a jacket outer wall 33, the jacket inner wall defines a mounting space for mounting the liquid hydrogen pump 1, and the jacket outer wall 33 is annularly arranged outside the jacket inner wall 32 and defines a jacket heat insulation space 34 with the jacket inner wall 32, the jacket heat insulation space 34 is provided in vacuum, and the jacket heat insulation space 34 is provided with a jacket opening. The liquid hydrogen jacket 3 is used to be sleeved outside the liquid hydrogen pump 1, and the liquid hydrogen jacket 3 has the effect of supporting and fixing the liquid hydrogen pump 1 arranged inside.

[0036] The storage container 2 comprises a storage container inner wall 20 and a storage container outer wall 21, the storage container outer wall 21 is annularly arranged outside the storage container inner wall 20 and defines a storage heat insulation space 22 with the storage container inner wall 20, the storage heat insulation space 22 is provided in vacuum, the storage heat insulation space 22 is provided with a heat insulation opening, and the heat insulation opening is directly communicated with the jacket opening. The storage container 2 in the embodiment of the present application can be cylindrical, spherical or polygonal. In the embodiment of the present application, the size of the storage container 2 can be flexibly set, when the storage capacity of liquid hydrogen is large, the storage container 2 in the embodiment of the present application can be a small storage tank specially used for mounting the liquid hydrogen pump 1, and the small storage tank is in communication with a large storage tank for storing liquid hydrogen. The liquid hydrogen jacket 3 is made of stainless steel plate which is resistant to low temperature and hydrogen corrosion, and the thickness and strength are designed and calculated according to the weight to be supported. The internal support member is made of material with high strength, low temperature resistance and low thermal conductivity to ensure sufficient support strength.

[0037] Please refer to Figures 1 to 6The jacket heat insulation space 34 is communicated with the storage heat insulation space 22, and the liquid hydrogen jacket 3 further comprises a heat insulation part 6 arranged in the jacket heat insulation space 34 and / or the storage heat insulation space 22.

[0038] The heat insulation part 6 in the embodiment of the present application can be a heat insulation material, or a heat exchange pipe, a heat exchange fin or the like structure having heat exchange (heat conduction, radiation or convection) capability, and is arranged in the jacket heat insulation space 34 to enhance the heat insulation effect of the jacket heat insulation space 34.

[0039] The liquid hydrogen storage device provided with the liquid hydrogen pump in the embodiment of the present application is characterized in that the jacket heat insulation space 34 is communicated with the storage heat insulation space 22, so that the cold energy is communicated between the jacket heat insulation space 34 and the storage heat insulation space 22, the heat insulation effect is improved, and the beneficial effects of integrated vacuumizing, maintenance and detection are achieved; the heat insulation part 6 arranged in the jacket heat insulation space 34 and / or the storage heat insulation space 22 is arranged in the jacket heat insulation space 34, so that the heat insulation effect of the jacket heat insulation space 34 is effectively enhanced, and the heat leakage of the liquid hydrogen pump 1 is reduced.

[0040] As an optional embodiment, the heat insulation part 6 further comprises a cooling screen 61, the cooling screen 61 is arranged around the outside of the jacket inner wall 32 to define a closed cooling screen space with the jacket inner wall 32, and a cooling medium coil 60 is arranged in the cooling screen space. The liquid hydrogen pump 1 is made of stainless steel, which is the main source of heat leakage. The cooling screen 61 in the embodiment of the present application can add a wall between the jacket inner wall 32 and the jacket outer wall 33, as shown in the drawing, so that most of the heat leakage of the liquid hydrogen pump 1 is isolated between the jacket inner wall 32 and the cooling screen 61, and the cooling medium coil 60 is arranged in the cooling screen 61 to block the heat flow between the jacket inner wall 32 and the cooling screen 61. The cooling medium coil 60 can be arranged on the side of the jacket inner wall 32 facing the jacket outer wall 33 along the length direction of the jacket inner wall 32 to block the heat flow from the liquid hydrogen pump 1, so that the liquid hydrogen in the storage container 2 is not affected by the heat leakage and is maintained at the required temperature for keeping the liquid hydrogen state. Figures 1 to 4

[0041] As an optional embodiment, the cooling medium in the cooling medium coil 60 is liquid hydrogen, and a liquid hydrogen inlet pipe of the cooling medium coil 60 is communicated with the outlet of the liquid hydrogen pump 1. The liquid hydrogen in the cooling medium coil 60 is taken from the outlet of the liquid hydrogen pump 1 and finally returned to the vaporizer for vaporization and pressurization. A valve is used to adjust the flow of the liquid hydrogen into the cooling medium coil 60, and no additional cooling medium needs to be introduced, so that the cooling cost of the heat insulation part 6 is reduced.

[0042] As an optional embodiment, the cooling screen 61 extends to the part of the jacket inner wall 32 located outside the storage container 2. Figure 4 ​As shown, the part of the cooling screen 61 extending out of the storage container 2 can function as a thermal breaker, and the part of the cooling screen 61 located in the storage container 2 can function as a thermal insulator, so as to effectively reduce the heat leakage.

[0043] As an optional embodiment, the cooling screen 61 further comprises an extension 62 extending towards the jacket outer wall 33. As shown, Figure 1 The extension 62 can expand the thermal insulation space of the cooling screen 61 in the transverse direction, which is conducive to further improving the thermal insulation effect of the cooling screen 61. In this embodiment, the extension 62 can abut against the jacket outer wall 33 to form a transverse thermal insulation space between the jacket inner wall 32 and the jacket outer wall 33, thereby improving the thermal insulation effect.

[0044] As an optional embodiment, the thermal insulation part 6 further comprises a thermal insulation assembly filled in the jacket thermal insulation space 34. The thermal insulation assembly comprises radiation layers and spacing layers arranged in parallel to the jacket inner wall 32. In this embodiment, the jacket thermal insulation space 34 is wrapped with a high-efficiency thermal insulation structure composed of multiple layers (such as 80 layers) of radiation layers and spacing layers with low thermal conductivity arranged alternately in parallel to the jacket inner wall 32. The radiation layer material can be selected from aluminum foil, copper foil, or aluminum-coated polyester film, and the spacing layer material can be selected from glass fiber paper, plant fiber paper, nylon cloth, or polyester film, so that the radiation, solid conduction, and residual gas conduction in the jacket thermal insulation space 34 are all reduced to a very low level. A plurality of small holes are formed in the radiation layer and the spacing layer to balance the interlayer pressure of the multiple layers of radiation layers and spacing layers, so as to ensure that the residual gas near the jacket inner wall 32 can be fully extracted. Alternatively, carbon-filled paper (activated carbon) can be used as a spacing material to take advantage of its high adsorption performance at low temperatures, or palladium oxide hydrogen adsorbent can be placed in the radiation layer and the spacing layer to adsorb the outgassing of the materials in the jacket thermal insulation space 34, and then molecular sieve adsorbent is placed to adsorb moisture, so as to ensure a high vacuum degree in the jacket thermal insulation space 34 for a relatively long time, thereby achieving a better thermal insulation effect.

[0045] As an optional embodiment, the liquid hydrogen jacket 3 is at least two, and the storage thermal insulation space 22 is provided with at least two thermal insulation openings. The at least two jacket openings and the at least two thermal insulation openings are in one-to-one correspondence. Figure 6 The at least two liquid hydrogen jackets 3 (two, three, four, five, six, etc.) arranged in the storage container 2 are conducive to realizing mutual backup of multiple liquid hydrogen pumps 1 or parallel operation of multiple liquid hydrogen pumps 1, thereby increasing the total delivery capacity and being suitable for various processes with different requirements.

[0046] As an optional embodiment, the liquid hydrogen jacket 3 is in the form of a sleeve, the jacket opening is located at the end of the liquid hydrogen jacket 3, and the liquid hydrogen jacket 3 is located outside the liquid storage space 23. Figure 6In the embodiment of the present application, the liquid hydrogen pump 1 does not need to extend to the bottom of the liquid storage space 23, and the above arrangement is beneficial to save the production and installation cost of the liquid hydrogen jacket 3.

[0047] As an optional embodiment, the liquid hydrogen jacket 3 is sleeve-shaped, the jacket opening is located on the side of the jacket outer wall 33, and the liquid hydrogen jacket 3 at least partially extends into the liquid storage space 23. In the embodiment of the present application, the liquid hydrogen pump 1 needs to extend to the bottom of the liquid storage space 23, and the above arrangement can further reduce the influence of the liquid hydrogen pump 1 on the liquid hydrogen in the liquid storage space 23, and effectively pump the liquid hydrogen at the bottom of the liquid storage space 23.

[0048] As an optional embodiment, the jacket inner wall 32 includes a heat insulation section 320 and an extension section 321, the heat insulation section 320 defines the jacket heat insulation space 34 together with the jacket outer wall 33, and the extension section 321 extends into the liquid storage space 23 and is provided with a jacket bottom valve 31 for controlling the communication and isolation between the mounting space 30 and the liquid storage space 23. Please refer to Figures 1 to 6 The liquid hydrogen pump 1 is immersed in the storage container 2, the liquid end (i.e. the cold end) of the liquid hydrogen pump 1 is placed in the storage container 2 for pumping liquid hydrogen, and the driving end is installed outside the storage container 2. The extension section provides a closed space for the part of the liquid hydrogen pump 1 extending into the liquid storage space 23, avoiding direct contact between the liquid hydrogen pump 1 and the liquid hydrogen. The jacket bottom valve 31 in the embodiment of the present application is made of stainless steel plate resistant to low temperature and hydrogen corrosion, and the thickness and strength are designed and calculated according to the weight to be supported. As shown in Figure 6 The bottom of the jacket inner wall 32 is lower than the bottom of the jacket outer wall 33, and the jacket inner wall 32 is fixed (welded, integrally formed, etc.) or detachably connected with the jacket bottom valve 31 below.

[0049] The jacket bottom valve 31 is used to control the communication or isolation between the liquid end of the liquid hydrogen pump 1 and the internal liquid storage space of the storage container 2. The space inside the storage container inner wall 20 is the internal liquid storage space of the storage container 2, which is used to store liquid hydrogen.

[0050] As an optional embodiment of the jacket bottom valve 31, the jacket bottom valve 31 is provided with a valve plate and two elastic members supported below two sides opposite to the valve plate, and the pump body of the liquid hydrogen pump 1 is provided with a slidable push rod above the valve plate, and the push rod is controlled to abut against the valve plate and move to the direction of the elastic members to push the valve plate away to open the jacket bottom valve 31. After the jacket bottom valve 31 is opened, the liquid hydrogen in the storage container 2 located in the inner wall 20 of the storage container enters the space defined by the inner wall 32 of the jacket through the jacket bottom valve 31 and contacts the pump head of the liquid hydrogen pump 1, and at this time, the liquid hydrogen pump 1 can be used to pump the liquid hydrogen and discharge the liquid hydrogen outside the pump after being pressurized. The push rod is controlled to move reversely to the direction away from the valve plate, the valve plate is restored to the original position under the restoring force of the elastic members to close the jacket bottom valve 31. After the jacket bottom valve 31 is closed, the space in the inner wall 32 of the jacket is completely sealed from the space in the liquid hydrogen storage container 2. At this time, the liquid hydrogen pump 1 can be disassembled or repaired, and the liquid hydrogen in the storage container 2 will not leak out of the liquid hydrogen jacket 3. It should be noted that after the liquid hydrogen pump 1 is disassembled from the liquid hydrogen jacket 3 or before the liquid hydrogen pump 1 is installed in the liquid hydrogen jacket 3, a blind flange is installed on the jacket flange 35 to isolate the external environment from the internal space of the liquid hydrogen jacket 3 and the storage container 2.

[0051] Specifically, a small part of the liquid hydrogen in the liquid hydrogen pipeline in the thermal interruption part and / or the cooling medium coil 60 in the heat insulation part 6 will be vaporized after absorbing heat. Therefore, two-phase flow will be formed in the liquid hydrogen pipeline and / or the cooling medium coil 60. The liquid hydrogen inlet flow is adjusted to keep the liquid phase flow in the outlet at a suitable flow, so that the heat absorption and cooling effect can be achieved.

[0052] As an optional embodiment, a connecting pipe is arranged between the storage heat insulation space 22 and the jacket heat insulation space 34, and a control valve is installed on the connecting pipe to control the opening or closing of the connecting pipe. In the embodiment, the connecting pipe is closed when the control valve is closed, and the storage heat insulation space 22 is separated from the jacket heat insulation space 34; when the control valve is opened, the connecting pipe connects the storage heat insulation space 22 and the jacket heat insulation space 34. The control valve controls the connection or separation between the storage heat insulation space 22 and the jacket heat insulation space 34, so that no adsorbent for various gas molecules is installed in the liquid hydrogen jacket 3. When the adsorbent for various gas molecules is needed in the liquid hydrogen jacket 3, the control valve is opened, and the adsorbent in the storage heat insulation space 22 is used to adsorb the volatilized various gas molecules.

[0053] As an optional embodiment, the liquid hydrogen pump 1 is provided with a liquid hydrogen pump flange 10 on the portion outside the storage container 2, the liquid hydrogen jacket 3 is provided with a jacket flange 35 on the portion outside the storage container 2, and the liquid hydrogen pump flange 10 is detachably connected with the jacket flange 35. In the embodiment, the liquid hydrogen pump flange 10 is connected with the jacket flange 35 through bolts, the liquid hydrogen pump 1 is detachably installed in the liquid hydrogen jacket 3, the liquid hydrogen pump 1 is convenient to disassemble or maintain, and the liquid hydrogen pump 1 is positioned.

[0054] The heat blocking part in the embodiment can be a heat exchange pipe or a heat exchange fin arranged on the inner wall 32 of the jacket. After the liquid hydrogen jacket 3 is installed on the storage container 2, the heat flow on the liquid hydrogen jacket 3 outside the storage container 2 is blocked and absorbed by the heat blocking part when conducting downward along the wall of the stainless steel plate, so that the temperature of the stainless steel plate below the heat blocking part on the liquid hydrogen jacket 3 is kept in the temperature range required for maintaining the liquid hydrogen state for a long time, and the heat leakage caused by the wall heat conduction of the liquid hydrogen jacket 3 is reduced.

[0055] As an optional embodiment, the portion of the inner wall 32 of the jacket between the inner wall 20 of the storage container and the outer wall 21 of the storage container is provided with an inner wall expansion joint 4, and the heat blocking part includes a liquid hydrogen pipe arranged on the inner wall expansion joint 4, and the liquid hydrogen pipe is filled with liquid hydrogen. The liquid hydrogen pipe in the embodiment can be welded and fixed on the inner wall expansion joint 4, the number of the inner wall expansion joint 4 and / or the liquid hydrogen pipe can be one, two, three, etc., respectively, and the inner wall expansion joint 4 can be welded and fixed on the two sides of the liquid hydrogen pipe arranged oppositely in sections. The liquid hydrogen pipe is filled with liquid hydrogen. The liquid hydrogen is taken from the outlet of the liquid hydrogen pump 1 and finally returned to the vaporizer for vaporization and pressurization, and a valve is used to adjust the flow of the liquid hydrogen into the liquid hydrogen pipe.

[0056] Specifically, the inner wall expansion joint 4 can be made of metal, allowing the inner wall 20 of the storage container and the outer wall 21 of the storage container to float within a certain range, meeting the performance requirements of expansion and contraction at low temperature, to protect the special mechanical properties of the double-walled storage container 2.

[0057] As an optional embodiment, an outer wall expansion joint 40 is provided on the portion of the outer wall 33 of the jacket located between the inner wall 20 and the outer wall 21 of the storage container, and / or on the portion of the outer wall of the jacket located outside the storage container, and the liquid hydrogen pipeline extends to the outer wall expansion joint 40. In this embodiment, the liquid hydrogen pipeline is partially welded and fixed to the inner wall expansion joint 40 and partially welded and fixed to the outer wall expansion joint 40 to increase the heat-blocking effect. In this embodiment, the outer wall expansion joint 40 can be made of metal, allowing the inner wall 20 and the outer wall 21 of the storage container to float within a certain range to protect the special mechanical properties of the double-walled storage container 2. The outer wall expansion joint 40 and the inner wall expansion joint 4 can be integrally formed for easy installation and stable reliability.

[0058] Among them, such as Figures 1 to 6 As shown, the outer wall expansion joint 40 can be provided on the portion of the outer wall 33 of the jacket located outside the storage container 2 to increase the flexibility compensation effect.

[0059] This application also provides a liquid hydrogen transportation system, including a liquid hydrogen tanker and the liquid hydrogen storage device described in any of the above embodiments. In this embodiment, the storage container 2 can be directly connected to the liquid hydrogen tanker. Specifically, the storage container 2 has a first liquid inlet, which is detachably connected to the liquid hydrogen tanker via a first flexible hose. A pressure sensor and a temperature sensor are installed inside the storage container 2 to monitor the state of the liquid hydrogen in real time.

[0060] Alternatively, when the liquid hydrogen storage capacity is large, in another embodiment of this application, the storage container 2 is used as a pump pool, with a liquid hydrogen pump 1 installed inside. A liquid hydrogen storage tank for storing large quantities of liquid hydrogen is located on the outside of the storage container 2, and the liquid hydrogen storage tank is connected to a liquid hydrogen tanker. Specifically, the storage container 2 is a pump pool, and a liquid hydrogen storage tank is located on the outside of the pump pool. The liquid hydrogen storage tank has a second inlet. The pump pool and the storage tank are controllably connected via a rigid pipe and a control valve. The second inlet is detachably connected to the liquid hydrogen tanker via a second flexible hose. Pressure and temperature sensors are installed inside the storage tank to monitor the state of the liquid hydrogen in real time.

[0061] As an optional embodiment, the storage container 2 is provided with at least two liquid hydrogen jackets. The at least two liquid hydrogen jackets in the storage container 2 can be equipped with at least two piston-type liquid hydrogen pumps, which facilitates the mutual backup of multiple pumps or the parallel operation of multiple pumps, increasing the total delivery capacity and allowing selection for various processes with different requirements.

[0062] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0063] The foregoing is merely illustrative of the principles and preferred embodiments of the application. It is to be understood that numerous other variations of the details, materials and arrangements are possible within the scope of the application as delineated in the appended claims.

Claims

1. A liquid hydrogen storage device equipped with a liquid hydrogen pump, characterized in that, include: Connected liquid hydrogen jacket and storage container; The liquid hydrogen jacket includes an inner wall and an outer wall. The inner wall defines an installation space for installing a liquid hydrogen pump. The outer wall is arranged around the outer side of the inner wall and defines a jacket insulation space together with the inner wall. The jacket insulation space is provided with a jacket opening. The storage container includes an inner storage wall and an outer storage wall. The inner storage wall defines a liquid storage space. The outer storage wall is arranged around the inner storage wall and defines a thermal insulation space. The thermal insulation space has a thermal insulation opening, which is directly connected to the jacket opening. The liquid hydrogen jacket also includes a heat insulation portion disposed in the jacket insulation space and / or the storage insulation space.

2. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 1, characterized in that, The heat insulation part also includes a cooling screen, which is arranged around the outer side of the inner wall of the jacket and defines a closed cooling screen space with the inner wall of the jacket. A cooling medium coil is arranged in the cooling screen space.

3. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 2, characterized in that, The cooling medium in the cooling medium coil is liquid hydrogen, and the liquid hydrogen inlet pipe is connected to the outlet of the liquid hydrogen pump.

4. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 2, characterized in that, The cooling screen extends to the portion of the inner wall of the jacket located outside the storage container.

5. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 2, characterized in that, The cooling screen also includes an extension that extends toward the outer wall of the jacket.

6. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 2, characterized in that, The heat insulation part further includes a heat insulation component filled in the jacket heat insulation space, the heat insulation component including a radiation layer and a spacer layer spaced apart along a direction parallel to the inner wall of the jacket.

7. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 1, characterized in that, The liquid hydrogen jacket is at least two, and the storage insulation space is provided with at least two insulation openings, with at least two jacket openings and at least two insulation openings connected in a one-to-one correspondence.

8. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 1, characterized in that, The liquid hydrogen jacket is sleeve-shaped, with the jacket opening located at the end of the liquid hydrogen jacket and the liquid hydrogen jacket located outside the liquid storage space.

9. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to claim 1, characterized in that, The liquid hydrogen jacket is sleeve-shaped, with the jacket opening located on the side of the outer wall of the jacket, and the liquid hydrogen jacket at least partially extending into the liquid storage space.

10. The liquid hydrogen storage device equipped with a liquid hydrogen pump according to any one of claims 8 or 9, characterized in that, The inner wall of the jacket includes an insulation section and an extension section. The insulation section and the outer wall of the jacket define the jacket insulation space. The extension section extends into the liquid storage space and is provided with a jacket bottom valve. The jacket bottom valve is used to control the connection and isolation between the installation space and the liquid storage space.

11. A liquid hydrogen storage system, characterized in that, Includes liquid hydrogen tank trucks and liquid hydrogen storage devices equipped with liquid hydrogen pumps as described in any one of claims 1-10; The storage container is provided with a first liquid inlet, which is detachably connected to the liquid hydrogen tanker via a first hose.

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