Low-temperature high-pressure hydrogen storage tank

Abstract

The invention belongs to the technical field of hydrogen storage tanks, and discloses a low-temperature high-pressure hydrogen storage tank which comprises an outer barrel body, an inner barrel body is fixedly mounted on the inner wall of the outer barrel body, the outer side of the inner barrel body is coated with an insulating layer, a liquid pumping / feeding pipe is mounted in the inner barrel body, and a vaporization coil pipe is fixedly mounted on the inner wall of the outer barrel body. A liquid level meter is fixedly installed between the middle of the outer barrel body and the middle of the inner barrel body, a base is fixedly installed at the bottom end of the inner wall of the outer barrel body, and the top end of the base is fixedly connected with the bottom end of the inner barrel body. An up-down convection assembly is installed on the inner wall of the outer barrel body and comprises an arc-shaped gathering cover fixedly installed on the outer side of the base, a flow guide pipe is fixedly installed at the bottom end of the arc-shaped gathering cover, and a spraying ring is connected to the outer side of an air outlet of the flow guide pipe. The heat transfer effect is further improved, the local overheating phenomenon is reduced, and the stability and safety of the hydrogen storage tank under the low-temperature and high-pressure conditions are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen storage tanks, and in particular relates to a low-temperature and high-pressure hydrogen storage tank. Background Art

[0002] The balance between energy use and environmental protection has aroused people's attention to hydrogen energy. At present, the research on hydrogen energy is mainly divided into three aspects: hydrogen production, hydrogen storage and hydrogen application. Among them, hydrogen storage is generally divided into gaseous hydrogen storage, liquid hydrogen storage, solid hydrogen storage, etc.

[0003] In the process of gaseous hydrogen storage, hydrogen storage tanks with pressure and temperature regulation functions are usually used. By setting low temperature and high pressure regulation, hydrogen can be better stored;

[0004] Since gas is used to cool the hydrogen storage tank, the temperature of the gas inside the hydrogen storage tank will gradually rise, causing a temperature difference between the temperature at the top and the temperature at the bottom of the hydrogen storage tank. Summary of the invention

[0005] The present invention aims at the problem that the temperature of the gas inside the hydrogen storage tank gradually rises when the gas is used to cool the hydrogen storage tank in the prior art, which causes a temperature difference between the top temperature of the hydrogen storage tank and the bottom temperature of the hydrogen storage tank. The present invention proposes the following technical solution:

[0006] A low-temperature and high-pressure hydrogen storage tank, comprising: an outer barrel, an inner barrel fixedly mounted on the inner wall of the outer barrel, an insulating layer coated on the outer side of the inner barrel, a liquid extraction / liquid inlet pipe mounted inside the inner barrel, a vaporization coil fixedly mounted on the inner wall of the outer barrel, a liquid level gauge fixedly mounted between the middle of the outer barrel and the inner barrel, a base fixedly mounted on the bottom end of the inner wall of the outer barrel, and a fixed connection between the top end of the base and the bottom end of the inner barrel;

[0007] The inner wall of the outer barrel body is installed with upper and lower convection components, and the upper and lower convection components include an arc-shaped focusing hood fixedly installed on the outer side of the base, a guide pipe is fixedly installed on the bottom end of the arc-shaped focusing hood, a spray ring is connected to the outer side of the air outlet of the guide pipe, a drainage pipe is equidistantly embedded in the top of the spray circle, a guide structure is fixedly installed inside the drainage pipe, a barrier ring is fixedly installed on the top of the guide hood, a fan blade is rotatably connected between the bottom end of the barrier ring and the top end of the arc-shaped focusing hood, and spray pipes are equidistantly embedded in the inside of the barrier ring.

[0008] As a preferred embodiment of the above technical solution, a plurality of flow holes are opened inside the air guide cover, an arc-shaped focusing cover is welded at the bottom of the flow holes inside the air guide cover, and the air inlet end of the air guide pipe is fixedly installed inside the arc-shaped focusing cover.

[0009] As a preferred embodiment of the above technical solution, a water tank is fixedly installed at the top of the barrier cover at the outer position of the base, a partition plate is fixedly installed at the top of the inner wall of the water tank, limiting columns are symmetrically and equidistantly fixedly installed on the bottom end of the partition plate, and limiting sleeves are sleeved on the outer sides of the limiting columns, a movable plate is fixedly installed between the bottom ends of the two limiting sleeves, an airbag is fixedly installed between the top of the movable plate and the bottom end of the partition plate, the air inlet of the airbag passes through the partition plate, a gathering pipe is connected between the air inlet pipes of several of the airbags, and the air outlet end of the gathering pipe is connected to the air inlet end of the spray pipe.

[0010] As a preferred embodiment of the above technical solution, a booster coil is installed at the bottom end of the inner wall of the outer barrel body, a protective ring is fixedly installed on the outside of the insulating layer, and a neck tube is fixedly installed between the top end of the inner barrel body and the bottom end of the inner wall of the outer barrel body.

[0011] As a preferred embodiment of the above technical solution, a protective cover is fixedly installed on the top of the liquid level gauge, and six pipes are installed on the outside of the liquid level gauge, the outside of the first pipe is connected to a gas phase valve, the outside of the second pipe is installed with a four-way pipe, the first air outlet of the four-way pipe is installed with an explosion piece, the second air outlet of the four-way pipe is installed with a pressure gauge, the third air outlet of the four-way pipe is installed with a safety valve, the outside of the third pipe is installed with an exhaust valve, the outside of the fourth pipe is installed with a pressure regulator, the outside of the fifth pipe is installed with a boost valve, and the outside of the sixth pipe is installed with a liquid phase valve.

[0012] As a preferred embodiment of the above technical solution, the diversion structure includes a barrier ring fixedly installed inside the drainage tube, a hose is installed at one end of the barrier ring, one end of the hose is connected to a rotating tube, a rotating column is fixedly installed in the middle of the rotating tube, a vertical plate is sleeved on the outer side of the rotating column, and the vertical plate is fixedly installed on one end face of the barrier ring.

[0013] As a preferred embodiment of the above technical solution, a gear is fixedly installed on the outside of the rotating column at a position inside the rotating tube, a rack is meshingly connected to the outside of the gear, a movable plate is fixedly installed on one end of the rack, and a spring rod is symmetrically embedded and installed on one end of the movable plate.

[0014] As a preferred embodiment of the above technical solution, one end surface of the spring rod is fixedly connected to the barrier ring, and the number of the spring rods is set to two.

[0015] As a preferred embodiment of the above technical solution, a circular groove is provided inside the vertical plate, and a limiting ring is welded on the outer side of the rotating column at a position inside the circular groove.

[0016] The beneficial effects of the present invention are:

[0017] (1) It can effectively increase the flow rate of gas, improve the gas circulation efficiency, further improve the heat transfer effect, reduce local overheating, and ensure the stability and safety of hydrogen storage tanks under low temperature and high pressure conditions;

[0018] (2) This method can effectively reduce the damage caused by vibration to the hydrogen storage tank, improve the stability and safety of the system, reduce the impact of vibration on the hydrogen storage tank, and use the swing energy of water to enhance the flow of gas and improve the heat transfer effect;

[0019] (3) It effectively solves the problem of uneven distribution of gas when it is directly injected, so that the cold air can evenly cover the top of the inner wall of the hydrogen storage tank, which helps to improve the cooling efficiency or gas replacement effect of the hydrogen storage tank and ensure the safety and performance stability of the hydrogen storage tank;

[0020] (4) It can automatically adjust according to the changes in the gas velocity inside the drainage tube without external human intervention to adapt to different gas flow conditions. It has strong adaptive capabilities and can better cope with complex and changing working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic structural diagram of a low-temperature and high-pressure hydrogen storage tank in Example 1;

[0022] Figure 2 Shown is a cross-sectional view of the outer barrel in Example 1;

[0023] Figure 3 The structure diagram of the upper and lower convection components in Example 1 is shown;

[0024] Figure 4 The figure shows a schematic diagram of the installation structure of the arc-shaped gathering cover in Example 1;

[0025] Figure 5 Shown is a cross-sectional view of the upper and lower convection components in Example 1;

[0026] Figure 6 The figure shows a schematic diagram of the installation structure of the limit sleeve in Example 1;

[0027] Figure 7 What is shown is a schematic structural diagram of the flow guide structure in Example 1;

[0028] Figure 8 What is shown is a schematic diagram of the installation structure of the gear in Example 1.

[0029] In the figure: 1. outer barrel; 2. inner barrel; 3. insulation layer; 4. liquid extraction / inlet pipe; 5. vaporization coil; 6. liquid level gauge; 7. base; 8. upper and lower convection components; 81. guide cover; 82. arc-shaped gathering cover; 83. guide pipe; 84. spray ring; 85. drainage pipe; 86. guide structure; 861. barrier ring; 862. vertical plate; 863. rotating column; 864. rotating tube; 865. hose; 866. spring rod; 867. movable plate; 868. rack; 869. gear; 87. barrier cover; 88. fan blade; 89. water tank; 810. partition plate; 811. limit column; 812. limit sleeve; 813. movable plate; 814. air bag; 815. gathering pipe; 816. spray pipe. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0031] Example 1

[0032] The present invention provides a low-temperature and high-pressure hydrogen storage tank, such as Figures 1 to 8 As shown, it includes an outer barrel body 1, an inner barrel body 2 is fixedly installed on the inner wall of the outer barrel body 1, an insulating layer 3 is coated on the outer side of the inner barrel body 2, a liquid extraction / liquid inlet pipe 4 is installed inside the inner barrel body 2, a vaporization coil 5 is fixedly installed on the inner wall of the outer barrel body 1, a liquid level meter 6 is fixedly installed between the middle of the outer barrel body 1 and the inner barrel body 2, a base 7 is fixedly installed on the bottom end of the inner wall of the outer barrel body 1, and the top end of the base 7 is fixedly connected to the bottom end of the inner barrel body 2;

[0033] An upper and lower convection assembly 8 is installed on the inner wall of the outer barrel body 1, and the upper and lower convection assembly 8 includes an arc-shaped gathering hood 82 fixedly installed on the outer side of the base 7, a guide pipe 83 is fixedly installed on the bottom end of the arc-shaped gathering hood 82, a spray ring 84 is connected to the outer side of the air outlet of the guide pipe 83, a drainage pipe 85 is equidistantly embedded in the top of the spray ring 84, a guide structure 86 is fixedly installed inside the drainage pipe 85, a blocking ring 861 is fixedly installed on the top of the guide hood 81, a fan blade 88 is rotatably connected between the bottom end of the blocking ring 861 and the top of the arc-shaped gathering hood 82, and a spray pipe 816 is equidistantly embedded in the inside of the blocking ring 861.

[0034] like Figure 4 , Figure 5 and Figure 6 As shown, a plurality of flow holes are opened inside the air guide cover 81, an arc-shaped gathering cover 82 is welded at the bottom of the flow holes inside the air guide cover 81, and the air inlet end of the air guide pipe 83 is fixedly installed inside the arc-shaped gathering cover 82;

[0035] It can be used for gas convergence, which changes the difficulty of gas convergence and allows the converged gas to enter the interior of the flow guide pipe 83 along the arc-shaped gathering cover 82 , which changes the difficulty of gas entering the interior of the flow guide pipe 83 .

[0036] like Figure 4 , Figure 5 and Figure 6 As shown, a water tank 89 is fixedly installed at the top of the barrier cover 87 at the outer position of the base 7, a partition plate 810 is fixedly installed at the top of the inner wall of the water tank 89, and a limiting column 811 is fixedly installed at the bottom of the partition plate 810 at equal distances and symmetrically. A limiting sleeve 812 is sleeved on the outer side of the limiting column 811, and a movable plate 813 is fixedly installed between the bottom ends of the two limiting sleeves 812. An air bag 814 is fixedly installed between the top of the movable plate 813 and the bottom end of the partition plate 810, and an air inlet of the air bag 814 passes through the partition plate 810. A gathering pipe 815 is connected between the air inlet pipes of several air bags 814, and the air outlet end of the gathering pipe 815 is connected to the air inlet end of the spray pipe 816.

[0037] Since the hydrogen storage tank will vibrate during transportation, the water inside the water tank 89 will swing left and right. The swinging of the water inside the water tank 89 will push the movable plate 813 to move. When the movable plate 813 moves, it will drive the limiting sleeve 812 to move outside the limiting column 811. When the movable plate 813 moves, the airbag 814 is compressed. When the airbag 814 is compressed, the gas inside will flow. The gas inside the airbag 814 will enter the spray pipe 816 along the gathering pipe 815 and finally be sprayed out along the spray pipe 816.

[0038] like Figure 1 and Figure 2 As shown, a booster coil is installed at the bottom end of the inner wall of the outer barrel body 1, a protective ring is fixedly installed on the outside of the insulating layer 3, and a neck tube is fixedly installed between the top end of the inner barrel body 2 and the bottom end of the inner wall of the outer barrel body 1;

[0039] The inner barrel body 2 can be easily limited, the difficulty of limiting the inner barrel body 2 is changed, and the stability of the inner barrel body 2 is increased.

[0040] like Figure 1 and Figure 2 As shown, a protective cover is fixedly installed on the top of the liquid level gauge 6, and six pipes are installed on the outside of the liquid level gauge 6. A gas phase valve is connected to the outside of the first pipe, a cross is installed on the outside of the second pipe, an explosion piece is installed at the first air outlet of the cross, a pressure gauge is installed at the second air outlet of the cross, a safety valve is installed at the third air outlet of the cross, an exhaust valve is installed at the outside of the third pipe, a pressure regulator is installed at the outside of the fourth pipe, a booster valve is installed at the outside of the fifth pipe, and a liquid phase valve is installed at the outside of the sixth pipe;

[0041] It is used to adjust the air pressure inside the hydrogen storage tank, which changes the difficulty of adjusting the air pressure inside the hydrogen storage tank.

[0042] like Figure 7 and Figure 8 As shown, the flow guiding structure 86 includes a barrier ring 861 fixedly installed inside the drainage tube 85, a hose 865 is installed at one end of the barrier ring 861, and a rotating tube 864 is connected to one end of the hose 865. A rotating column 863 is fixedly installed in the middle of the rotating tube 864, and a vertical plate 862 is sleeved on the outer side of the rotating column 863. The vertical plate 862 is fixedly installed on one end surface of the barrier ring 861;

[0043] Since the gas inside the drainage tube 85 enters the hose 865 along the barrier ring 861, and enters the rotating tube 864 along the hose 865, and finally sprays on the top of the inner wall of the outer barrel body 1 along the rotating tube 864, the cold air and hot air at the top of the inner wall of the outer barrel body 1 are exchanged, preventing the temperature difference problem inside the outer barrel body 1.

[0044] like Figure 7 and Figure 8 As shown, a gear 869 is fixedly installed on the outer side of the rotating column 863 at the inner position of the rotating tube 864, and a rack 868 is meshedly connected on the outer side of the gear 869. A movable plate 867 is fixedly installed on one end of the rack 868, and a spring rod 866 is symmetrically embedded and installed on one end of the movable plate 867;

[0045] Since the gas flow rate is constant, the extrusion pressure of the gas on the movable plate 867 is different, and the different extrusion pressures cause the movable plate 867 to have different extrusion pressures on the spring rod 866, so that the movable plate 867 moves at different distances, and the rack 868 is driven to move by moving different intervals. The movement of the rack 868 drives the gear 869 to rotate, thereby changing the difficulty of rotating the gear 869.

[0046] like Figure 7 and Figure 8 As shown, one end face of the spring rod 866 is fixedly connected to the barrier ring 861, and the number of the spring rods 866 is set to two. A circular groove is opened inside the vertical plate 862, and a limiting ring is welded at the outer side of the rotating column 863 at the inner position of the circular groove;

[0047] Through the cooperation of the circular groove and the limiting ring, the rotating column 863 can rotate but cannot be displaced. The cooperation of the two spring rods 866 allows the blocking ring 861 to move stably, preventing the blocking ring 861 from swinging or rotating.

[0048] Working principle: During the actual use of the device, personnel inject hydrogen into the inner barrel 2. At this time, cold air is sprayed between the outer barrel 1 and the inner barrel 2 along the vaporizing coil 5. When there is a temperature difference inside the hydrogen storage tank, the colder gas has a larger density and will naturally sink, while the hotter gas has a smaller density and will rise. This natural convection phenomenon can promote the upward and downward flow of gas inside the hydrogen storage tank. When the gas flows up and down, the cold air enters between the guide cover 81 and the barrier ring 861. Since the distance between the guide cover 81 and the barrier ring 861 is reduced, the guide cover 81 and the barrier ring 861 are closed. The gas flow rate is increased, and the increased gas flow rate drives the fan blades 88 to rotate. When the fan blades 88 rotate, the cold air is accelerated to flow. The accelerated gas flows into the guide pipe 83, and finally enters the spray ring 84 along the guide pipe 83 to be sprayed on the top of the hydrogen storage tank. At the same time, part of the gas enters the guide pipe 85, and finally is discharged along the guide structure 86. This can effectively increase the flow rate of the gas, improve the circulation efficiency of the gas, further improve the heat transfer effect, reduce local overheating, and ensure the stability and safety of the hydrogen storage tank under low temperature and high pressure conditions.

[0049] At the same time, since the hydrogen storage tank will vibrate during transportation, the water inside the water tank 89 will swing left and right. When the water inside the water tank 89 swings, it pushes the movable plate 813 to move. When the movable plate 813 moves, it drives the limiting sleeve 812 to move outside the limiting column 811. When the movable plate 813 moves, it compresses the airbag 814. When the airbag 814 is compressed, the gas inside flows. The gas inside the airbag 814 enters the spray pipe 816 along the gathering pipe 815 and is finally ejected along the spray pipe 816. The ejected gas blows on the surface of the fan blade 88, which causes the fan blade 88 to rotate. This method can effectively reduce the damage to the hydrogen storage tank caused by vibration, improve the stability and safety of the system, reduce the impact of vibration on the hydrogen storage tank, and use the swinging energy of water to enhance the flow of gas and improve the heat transfer effect.

[0050] Due to the speed of the gas inside the drainage tube 85, the movable plate 867 moves. When the movable plate 867 moves, it drives the spring rod 866 to be compressed, and synchronously drives the rack 868 to move. When the rack 868 moves, it drives the gear 869 to rotate. When the gear 869 rotates, it drives the rotating tube 864 to rotate. At the same time, when multiple rotating tubes 864 rotate synchronously, the gas generates convection after being ejected, so that the cold air enters the top of the inner wall of the hydrogen storage tank evenly, effectively solving the problem of uneven distribution when the gas is directly injected, so that the cold air can evenly cover the top of the inner wall of the hydrogen storage tank, which helps to improve the cooling efficiency or gas replacement effect of the hydrogen storage tank, ensure the safety and performance stability of the hydrogen storage tank, and can automatically adjust according to the change of the gas speed inside the drainage tube 85 without external manual intervention to adapt to different gas flow states. It has strong adaptability and can better cope with complex and changeable working environments.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A low temperature and high pressure hydrogen storage tank, characterized in that: include: An outer barrel body (1), an inner barrel body (2) is fixedly mounted on the inner wall of the outer barrel body (1), an outer side of the inner barrel body (2) is coated with an insulating layer (3), a liquid extraction / liquid inlet pipe (4) is installed inside the inner barrel body (2), a vaporizing coil (5) is fixedly mounted on the inner wall of the outer barrel body (1), a liquid level meter (6) is fixedly mounted between the middle of the outer barrel body (1) and the inner barrel body (2), a base (7) is fixedly mounted on the bottom end of the inner wall of the outer barrel body (1), and the top end of the base (7) is fixedly connected to the bottom end of the inner barrel body (2); The inner wall of the outer barrel (1) is provided with an upper and lower convection assembly (8), and the upper and lower convection assembly (8) comprises an arc-shaped gathering hood (82) fixedly mounted on the outer side of the base (7); a guide pipe (83) is fixedly mounted on the bottom end of the arc-shaped gathering hood (82); a spray ring (84) is connected to the outer side of the air outlet of the guide pipe (83); a drainage pipe (85) is equidistantly embedded and mounted on the top of the spray ring (84); a guide structure (86) is fixedly mounted inside the drainage pipe (85); a barrier ring (861) is fixedly mounted on the top of the guide hood (81); a fan blade (88) is rotatably connected between the bottom end of the barrier ring (861) and the top end of the arc-shaped gathering hood (82); and a spray pipe (816) is equidistantly embedded and mounted inside the barrier ring (861).

2. A low-temperature and high-pressure hydrogen storage tank according to claim 1, characterized in that: A plurality of flow holes are provided inside the guide cover (81), an arc-shaped gathering cover (82) is welded at the bottom of the flow holes inside the guide cover (81), and an air inlet end of the guide pipe (83) is fixedly installed inside the arc-shaped gathering cover (82).

3. A low-temperature and high-pressure hydrogen storage tank according to claim 1, characterized in that: A water tank (89) is fixedly installed at the top of the barrier cover (87) at the outer position of the base (7), a partition plate (810) is fixedly installed at the top of the inner wall of the water tank (89), a limiting column (811) is fixedly installed at the bottom of the partition plate (810) in an equidistant and symmetrical manner, a limiting sleeve (812) is sleeved on the outer side of the limiting column (811), a movable plate (813) is fixedly installed between the bottom ends of the two limiting sleeves (812), an air bag (814) is fixedly installed between the top of the movable plate (813) and the bottom end of the partition plate (810), an air inlet of the air bag (814) passes through the partition plate (810), a gathering pipe (815) is connected between the air inlet pipes of a plurality of the air bags (814), and the air outlet end of the gathering pipe (815) is connected to the air inlet end of the spray pipe (816).

4. A low-temperature and high-pressure hydrogen storage tank according to claim 1, characterized in that: A booster coil is installed at the bottom end of the inner wall of the outer barrel body (1), a protective ring is fixedly installed on the outside of the insulating layer (3), and a neck tube is fixedly installed between the top end of the inner barrel body (2) and the bottom end of the inner wall of the outer barrel body (1).

5. A low-temperature and high-pressure hydrogen storage tank according to claim 1, characterized in that: A protective cover is fixedly installed on the top of the liquid level meter (6), and six pipes are installed on the outside of the liquid level meter (6). The outside of the first pipe is connected to a gas phase valve, the outside of the second pipe is installed with a four-way valve, the first air outlet of the four-way valve is installed with an explosion piece, the second air outlet of the four-way valve is installed with a pressure gauge, the third air outlet of the four-way valve is installed with a safety valve, the outside of the third pipe is installed with an exhaust valve, the outside of the fourth pipe is installed with a pressure regulator, the outside of the fifth pipe is installed with a boost valve, and the outside of the sixth pipe is installed with a liquid phase valve.

6. A low-temperature and high-pressure hydrogen storage tank according to claim 1, characterized in that: The guide structure (86) comprises a barrier ring (861) fixedly mounted inside the drainage tube (85); a hose (865) is mounted on one end of the barrier ring (861); one end of the hose (865) is connected to a rotating tube (864); a rotating column (863) is fixedly mounted in the middle of the rotating tube (864); a vertical plate (862) is sleeved on the outer side of the rotating column (863); and the vertical plate (862) is fixedly mounted on one end surface of the barrier ring (861).

7. A low-temperature and high-pressure hydrogen storage tank according to claim 6, characterized in that: A gear (869) is fixedly installed on the outside of the rotating column (863) at a position inside the rotating tube (864), and a rack (868) is meshedly connected to the outside of the gear (869). A movable plate (867) is fixedly installed on one end of the rack (868), and a spring rod (866) is symmetrically embedded and installed on one end of the movable plate (867).

8. A low-temperature and high-pressure hydrogen storage tank according to claim 7, characterized in that: One end surface of the spring rod (866) is fixedly connected to the blocking ring (861), and the number of the spring rods (866) is set to two.

9. A low-temperature and high-pressure hydrogen storage tank according to claim 7, characterized in that: A circular groove is provided inside the vertical plate (862), and a limiting ring is welded on the outside of the rotating column (863) at a position inside the circular groove.

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