A safe hydrogen storage tank

Abstract

The application relates to the technical field of hydrogen storage, and discloses a safe hydrogen storage tank, which has the technical scheme as follows: a tank body is arranged, an inner container is arranged in the tank body, a valve seat and a bottle valve capable of cooperating with the valve seat are arranged at a bottle opening of the tank body, a baffle is arranged in the inner container, a clamping space capable of clamping and sealing the bottle opening of the inner container is formed between the baffle and the valve seat, a hydrogen storage bottle is arranged, compared with the hydrogen storage bottle in the prior art, a baffle is arranged in the inner container, the clamping part of the baffle cooperates with the valve seat, the greater the air pressure in the inner container is, the greater the extrusion force at the bottle opening of the inner container is, and therefore, a better sealing effect is achieved. Furthermore, the application is provided with a first space and a second space.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage technology, and more specifically to a safe hydrogen storage tank. Background Technology

[0002] Due to the highly reactive chemical properties of hydrogen, its storage requires extreme safety precautions, as accidental leaks can have serious consequences. Current storage and transportation methods utilize bottled storage; however, gaps at the openings of existing hydrogen storage tanks can lead to leaks, potentially causing explosions in severe cases, thus posing significant safety hazards. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a safe hydrogen storage tank to overcome the above-mentioned defects in the existing technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a safe hydrogen storage tank, comprising a tank body, an inner liner disposed within the tank body, a valve seat and a valve that can cooperate with the valve seat at the tank body opening, a baffle disposed within the inner liner, a clamping space formed between the baffle and the valve seat that can clamp and seal the opening of the inner liner, the baffle dividing the inner liner into a first space and a second space, both of which can store gas, the baffle providing a squeezing force toward the valve seat through the gas pressure in the second space, thereby reducing the volume of the clamping space;

[0005] The baffle includes a through hole, through which the first space and the second space communicate; and

[0006] An opening and closing component, which closes the through hole when subjected to air pressure greater than a preset pressure.

[0007] As a further improvement of the present invention, the baffle includes a squeezing part, and the squeezing part and the valve seat form the clamping space. The squeezing part is located in the first space. The squeezing part includes a first squeezing surface and a second squeezing surface. The squeezing force exerted by the first squeezing surface and the second squeezing surface on the inner liner is proportional to the air pressure of the first space.

[0008] As a further improvement of the present invention, the extrusion part further includes a second extrusion surface. When the air pressure in the second space is greater than the air pressure in the first space, the extrusion force exerted by the second extrusion surface on the inner liner is proportional to the air pressure in the second space.

[0009] As a further improvement of the present invention, an angle of less than 180 degrees is formed between the first extrusion surface and the second extrusion surface.

[0010] As a further improvement of the present invention, the extrusion portion is arranged in a ring around the mouth of the inner liner bottle.

[0011] As a further improvement of the present invention, the opening and closing assembly includes a cylinder, a pressure diaphragm and a limiting member. The cylinder provides the preset pressure. At least the output end of the cylinder is located in the second space. A sealing space is formed between the pressure diaphragm and the baffle to accommodate at least the output end of the cylinder. When the pressure on the pressure diaphragm is greater than the preset pressure, the output end of the cylinder is retracted under pressure to drive the limiting member to close the through hole.

[0012] As a further improvement of the present invention, a sealing assembly is also included, the sealing assembly comprising a deformable block and a pressure block arranged in annular shape, the deformable block being embedded in the inner wall of the valve seat, the pressure block being driven to move toward the deformable block and provide a compressive force acting on the deformable block or being driven to reset and disengage from the deformable block, when the deformable block is compressed and deformed, it compresses the valve seat so that the valve seat provides a compressive force acting on the mouth of the inner liner bottle and opposite to the first compression surface.

[0013] As a further improvement of the present invention, it also includes at least one locking component, the locking component including a push block, a locking block, a locking block, a first elastic member and a second elastic member, the locking block being slidably mounted on the valve seat, the first elastic member connecting the locking block to the valve seat and being used to reset the valve seat, the locking block being slidably mounted inside the locking block, the second elastic member connecting the locking block to the locking block and being used to reset the locking block, the push block being driven to move the locking block toward the bottle valve so that the locking block fixes the bottle valve, and the end of the locking block near the bottle valve having an inclined surface facing the bottle opening.

[0014] As a further improvement of the present invention, a driving assembly is also included, the driving assembly comprising an annular sleeve and an annular push plate, the annular push plate being slidably installed inside the annular sleeve, the annular sleeve being connected to the first space via a connecting pipe, the air pressure inside the annular sleeve changing with the air pressure inside the first space to drive the annular push plate to move upward or descend to reset, and when the annular push plate is located above the reset point, it provides a driving force to drive the pressure block and / or the push block.

[0015] As a further improvement of the present invention, it also includes a bottle valve, which includes a first valve and a second valve. The first valve is sleeved on the outside of the second valve and is detachably connected to the valve seat. The outside of the first valve has a notch that can engage with the locking block. An exhaust channel is provided inside the first valve. The second valve is detachably disposed in the exhaust channel. The second valve can open or close the exhaust channel by moving along the exhaust channel.

[0016] The beneficial effects of this invention are as follows: This invention provides a hydrogen storage cylinder that, compared to existing hydrogen storage cylinders, incorporates a baffle inside the inner liner. The baffle's clamping part interacts with the valve seat, increasing the gas pressure inside the inner liner and thus the compressive force at the cylinder opening, resulting in a better seal. Furthermore, this invention features a first space and a second space, both capable of storing hydrogen. Therefore, the baffle's placement has minimal impact on the inner liner's hydrogen storage capacity. The clamping force at the cylinder opening is achieved not only through the gas pressure within the first and second spaces but also by cleverly utilizing the pressure difference between them to further enhance the seal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is the present invention. Figure 1 Enlarged structural diagram at point A;

[0019] Figure 3 This is the present invention. Figure 1 Enlarged structural diagram at point B;

[0020] Figure 4 This is the present invention. Figure 1 Enlarged structural diagram at point C;

[0021] Figure 5 This is the present invention. Figure 2 Side view of the middle limiting component.

[0022] Reference numerals: 1. Tank body; 2. Inner liner; 3. Baffle; 4. Valve seat; 5. Gasket; 6. Bottle valve; 7. First valve; 8. Second valve; 9. Through hole; 10. Limiting element; 11. Slide plate; 12. Hinge rod; 13. Opening and closing assembly; 14. Cylinder; 15. Mounting base; 16. Sealing space; 17. Pressure diaphragm; 18. Connecting pipe; 19. Annular sleeve; 20. Pressure block; 21. First extrusion surface; 22. Sealing assembly; 23. Deformation block; 24. Second extrusion surface; 25. Extrusion section; 27. Push block; 28. Locking block; 29. ​​Locking assembly; 30. First elastic element; 31. Clamping block; 32. Notch; 33. Exhaust channel; 34. Valve plug; 35. Annular push plate; 36. First channel; 37. Second channel; 38. Drive assembly; 40. First space; 41. Second space. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] This embodiment of a safe hydrogen storage tank includes a tank body 1, with an inner liner 2 disposed inside the tank body 1. The tank body 1 and the inner liner 2 are fitted together except for a small portion at the bottle opening and bottom, and can be fixedly connected. The material of the inner liner 2 includes, but is not limited to, HDPE lining material. A valve seat 4 and a bottle valve 6 that can cooperate with the valve seat 4 are disposed at the bottle opening of the tank body 1. A baffle 3 is disposed inside the inner liner 2. A clamping space is formed between the baffle 3 and the valve seat 4 to clamp and seal the bottle opening of the inner liner 2. The clamping space is annular and adapted to the shape of the bottle opening of the inner liner 2. The baffle 3 divides the inner liner 2 into a first space 40 and a second space 41, both of which can store gas. The baffle 3 provides a squeezing force toward the valve seat 4 through the gas pressure in the second space 41, so as to reduce the volume of the clamping space. The smaller the clamping space, the greater the pressure acting on the bottle opening of the inner liner 2.

[0025] The baffle 3 includes a through hole 9, through which the first space 40 and the second space 41 are connected; and

[0026] When the air pressure of the opening and closing component 13 exceeds the preset pressure, it closes the through hole 9.

[0027] This invention provides a hydrogen storage cylinder. Compared to existing hydrogen storage cylinders, a baffle 3 is installed inside the inner liner 2. The clamping part of the baffle 3 cooperates with the valve seat 4, so that the greater the gas pressure inside the inner liner 2, the greater the squeezing force at the cylinder opening, thus achieving a better sealing effect. Furthermore, this invention provides a first space 40 and a second space 41, both of which can store hydrogen. Therefore, the baffle 3 has virtually no impact on the hydrogen storage capacity of the inner liner 2. The clamping force at the cylinder opening is achieved not only through the gas pressure within the first space 40 and the second space 41, but also by cleverly utilizing the pressure difference between the two spaces to further improve the sealing effect.

[0028] Specifically, as shown in the attached figure, the baffle 3 is positioned near the bottle opening, making the first space 40 much smaller than the second space 41. This is because during storage and transportation, the air pressure in the second space 41 is greater than the air pressure in the first space 40. Therefore, the unit volume storage capacity in the second space 41 is greater than the unit storage capacity in the first space 40. This arrangement can effectively improve the storage capacity of the tank 1.

[0029] Furthermore, the baffle 3 is set horizontally, parallel to the bottle opening of the can 1. The advantage of this setting is that the pressure on the baffle 3 is perpendicular to the bottle opening, which provides a better sealing effect for the inner liner 2.

[0030] In one embodiment, the number of through holes 9 can be set to multiple to improve the ventilation efficiency between the first space 40 and the second space 41.

[0031] In one embodiment, the baffle 3 includes a compression part 25, and a clamping space is formed between the compression part 25 and the valve seat 4. The compression part 25 is located in the first space 40. The compression part 25 includes a first compression surface 21 and a second compression surface 24. The compression force exerted by the first compression surface 21 and the second compression surface 24 on the inner liner 2 is proportional to the air pressure of the first space 40.

[0032] Specifically, as shown in the attached figure, the squeezing part 25 is located on the upper side of the baffle 3 and is arranged in a ring shape, which can just fit and clamp the inner liner 2.

[0033] In one embodiment, the extrusion part 25 further includes a second extrusion surface 24. When the air pressure in the second space 41 is greater than the air pressure in the first space 40, the extrusion force exerted by the second extrusion surface 24 on the inner liner 2 is proportional to the air pressure in the second space 41.

[0034] In one embodiment, the extrusion section 25 is arranged in a ring around the mouth of the inner liner 2.

[0035] In one embodiment, the first extrusion surface 21 and the second extrusion surface 24 form an angle of less than 180 degrees. This is to prevent the second extrusion surface 24 from being non-perpendicular to the bottle opening when the first extrusion surface 21 is perpendicular to the bottle opening. In this way, the air pressure difference in the first space 40 and the second space 41 can be transmitted to the second extrusion surface 24, ensuring the sealing effect of the inner liner 2.

[0036] Specifically, the extrusion section 25 has a section of the second extrusion surface 24 with a gradually decreasing thickness. The advantage of this design is that this section has a certain deformation capability. When the pressure difference between the second space 41 and the first space 40 is large, the second extrusion surface 24 can better fit the inner liner 2, and the fitting area will also increase to a certain extent.

[0037] The present invention provides a squeezing part 25, which has two squeezing surfaces. After the first space 40 and the second space 41 are filled with air, the squeezing part 25 is affected by the air pressure and the air pressure difference between the two spaces, and clamps and seals the mouth of the inner liner 2.

[0038] In one embodiment, the opening and closing assembly 13 includes a cylinder 14, a pressure diaphragm 17, and a limiting member 10. The cylinder 14 provides a preset pressure, the magnitude of which can be determined by setting different cylinders 14, or by selecting a cylinder 14 with adjustable air pressure. At least the output end of the cylinder 14 is located within the second space 41. Of course, if only the output end of the cylinder 14 is located within the second space 41, its output end is slidably connected to the baffle 3. A sealed space 16 is formed between the pressure diaphragm 17 and the baffle 3 to accommodate at least the output end of the cylinder 14. That is, as shown in the figure, the output end of the cylinder 14 is in close contact with the pressure diaphragm 17 and is surrounded by the baffle 3. When the pressure on the pressure diaphragm 17 is greater than the preset pressure, the output end of the cylinder 14 is compressed and retracts to drive the limiting member 10 to close the through hole 9.

[0039] This invention incorporates an opening and closing component 13, which establishes a pressure difference between the first space 40 and the second space 41. Furthermore, the opening and closing component 13 only closes the through-hole 9 when the pressure in the first space 40 and the second space 41 is too high. This offers several advantages. First, when the pressure inside the hydrogen storage tank is low, the squeezing force of the squeezing part 25 on the inner liner 2 is minimal; the squeezing force is provided solely by the pressure inside the first space 40, reducing damage to the inner liner 2 from the squeezing part 25. Second, the opening and closing component 13 only activates when the pressure inside the hydrogen storage tank is too high, closing the through-hole 9. Because the first space 40 contains a certain amount of hydrogen, the pressure difference between the first space 40 and the second space 41 will not be excessive. Thus, the squeezing force acting on the inner liner 2 is controllable, and the pressure on the baffle 3 is also controllable, ensuring the service life of both the baffle 3 and the inner liner 2.

[0040] In one embodiment, the opening and closing assembly 13 further includes a mounting base 15, a hinge rod 12, and a sliding plate 11. The cylinder 14 is mounted on the side of the baffle 3 located in the first space 40 via the mounting base 15. The sliding plate 11 is slidably mounted on the baffle 3. The sliding plate 11 is provided with a small hole that can communicate with the through hole 9. One end of the hinge rod 12 is hinged to the sliding plate 11, and the other end of the hinge rod 12 is hinged to the part of the cylinder 14 output end located in the second space 41. When the pressure on the cylinder 14 output end and the pressure diaphragm 17 is greater than the preset pressure of the cylinder 14, the cylinder 14 output end retracts, and the sliding plate 11 is moved by the hinge rod 12, causing the small hole and the through hole 9 to be misaligned.

[0041] Specifically, it also includes a limiting member 10, which is disposed on the baffle 3 and slidably connected to the slide plate 11. The limiting member 10 is used to restrict the sliding direction of the slide plate 11 so that it can only slide and connect to the baffle 3.

[0042] Furthermore, the vertical cross-section of the limiting member 10 is arranged in a gate shape, surrounding the top and sides of the slide plate 11.

[0043] Furthermore, the number of limiting members 10 can be set to multiple to ensure that the skateboard 11 can be tightly attached to the baffle 3.

[0044] Specifically, the pressure diaphragm 17 is selected to have greater elasticity, that is, it will not easily deform after being subjected to air pressure. The pressure required for its deformation is basically the same as the pressure of the cylinder 14, so as to prevent the pressure diaphragm 17 from sticking to and wrapping the output end of the cylinder 14.

[0045] In one embodiment, a sealing assembly 22 is also included. The sealing assembly 22 includes a deformable block 23 and a pressure block 20 arranged in annular shape. The deformable block 23 is embedded in the inner wall of the valve seat 4. The pressure block 20 is driven to move toward the deformable block 23 and provide a compressive force acting on the deformable block 23, or is driven to reset and disengage from the deformable block 23. When the deformable block 23 is compressed and deformed, it compresses the valve seat 4 so that the valve seat 4 provides a compressive force acting on the bottle mouth of the inner liner 2 and opposite to the first compression surface 21.

[0046] The present invention includes a sealing component 22, which can generate a compressive force on the deformation block 23 when the first space 40 has a certain air pressure. This compressive force forms an action and reaction force with the compressive force formed by the first compressive surface 21, which can not only better clamp the bottle mouth of the inner liner 2, but also prevent the bottle mouth of the inner liner 2 from shifting, thereby improving the service life of the bottle mouth of the inner liner 2.

[0047] Specifically, both the deformable block 23 and the pressing block 20 have mutually abutting inclined surfaces, so that the pressing block 20 will not get stuck during its upward movement.

[0048] Specifically, the material of the deformable block 23 includes, but is not limited to, rubber, plastic, and other materials with a certain degree of elastic deformation.

[0049] Specifically, the valve seat 4 has a thinner wall thickness at the installation location of the deformation block 23, which can generate a certain deformation, thereby transmitting the compressive force of the deformation block 23 to the inner liner 2.

[0050] In one embodiment, at least one locking component 29 is further included. The locking component 29 includes a push block 27, a locking block 28, a latching block 31, a first elastic element 30, and a second elastic element. The locking block 28 is slidably mounted on the valve seat 4. As shown in the figure, the locking block 28 penetrates the valve seat 4, with one end aligned with the push block 27 and the other end aligned with the extension direction of the bottle mouth of the can 1. The first elastic element 30 connects the locking block 28 to the valve seat 4 and is used to reset the valve seat 4. That is, after the locking block 28 is disengaged from its initial position, the first elastic element 30 can reset the valve seat 4 when the external force is released. The latching block 31 is slidably mounted inside the locking block 28. As shown in the figure, the latching block 31 is partially located inside the locking block 28, with one end protruding. The movement direction of the latching block 31 is the same as that of the locking block 28. The second elastic element is disposed inside the locking block 28 and connects the end of the latching block 31 located inside the locking block 28 with the valve seat 4. The locking block 28 is connected, and the second elastic element is used to reset the locking block 31. That is, after the locking block 31 is disengaged from the initial position, when the external force is released, the first elastic element 30 can reset the valve seat 4. The push block 27 is driven to move the locking block 28 toward the bottle valve 6 so that the locking block 31 fixes the bottle valve 6. The end of the locking block 31 near the bottle valve 6 has a slope facing the bottle opening. The slope is designed so that after filling the hydrogen canister, the bottle valve 6 needs to be installed into the valve seat 4. However, at this time, the push block 27 is under pressure and has entered the space required by the bottle valve 6. The slope is equivalent to a guide surface. When the bottle valve 6 is inserted, the locking block 31 will retract when the bottle valve 6 contacts the slope. However, once the locking block 31 is locked into the notch 32, the bottle valve 6 cannot be removed. In this way, during the actual gas release process, the first valve 7 in the bottle valve 6 is fixed, and there is no need to worry about the bottle valve 6 being disengaged from the valve seat 4 due to excessive pressure during gas release.

[0051] Specifically, both push block 27 and locking block 28 are provided with inclined surfaces for guidance. When push block 27 moves upward, it can drive locking block 28 to move horizontally.

[0052] Specifically, as shown in the attached figure, the inner wall of the valve seat 4 is formed with a groove to accommodate the push block 27, the first elastic element 30 and the locking block 31 in the initial state.

[0053] Specifically, several locking components 29 can be provided, all distributed on the top of the annular push plate 35, thereby improving the fixing effect.

[0054] Specifically, the notch 32 is also annularly arranged on the first valve 7 to ensure that the locking block 31 can be accurately locked into the notch 32.

[0055] In one embodiment, a driving assembly 38 is also included. The driving assembly 38 includes an annular sleeve 19 and an annular pusher plate 35. The arrangement of the annular sleeve 19 and the annular pusher plate 35 not only enables the driving of the pusher block 27 and the pressure block 20, but also does not affect the entry and exit of hydrogen. The annular pusher plate 35 is slidably installed inside the annular sleeve 19. At the same time, the annular pusher plate 35 and the annular sleeve 19 are vertically arranged, both perpendicular to the bottle opening of the tank 1. The annular sleeve 19 is connected to the first space 40 through the connecting pipe 18. The gas pressure inside the annular sleeve 19 changes with the gas pressure inside the first space 40 to drive the annular pusher plate 35 to move upward or descend to reset. When the annular pusher plate 35 is located above the reset point, it provides the driving force to drive the pressure block 20 and / or the pusher block 27.

[0056] Specifically, a third elastic element is also provided inside the annular sleeve. When the pressure provided by the air pressure in the first space 40 is less than the elastic force of the third elastic element, the third elastic element drives the annular push plate 35 to reset.

[0057] In one embodiment, the system further includes a bottle valve 6, which includes a first valve 7 and a second valve 8. The first valve 7 is sleeved on the outside of the second valve 8 and is detachably connected to the valve seat 4 (i.e., the two can be connected by a threaded contact portion). The outside of the first valve 7 is provided with a notch 32 that can engage with the locking block 31. An exhaust channel 33 is provided inside the first valve 7, and the second valve 8 is detachably disposed in the exhaust channel 33 (i.e., the two can be connected by a threaded contact portion). The second valve 8 can open or close the exhaust channel 33 by moving along the exhaust channel 33.

[0058] Specifically, the first valve 7 and the second valve 8 are arranged coaxially.

[0059] Specifically, as shown in the attached figure, the diameter of the middle part of the second valve 8 is set from large to small, with the large part fitting exactly to the mouth of the canister 1. This part is threadedly connected to the first valve 7, and the small part forms a certain gap with the exhaust channel 33, so that hydrogen can be discharged along the exhaust channel 33 when venting.

[0060] Specifically, as shown in the attached diagram, the second valve 8 has several second channels 37, and the first valve 7 has a first channel 36. After the second valve 8 descends a certain distance, the first channel 36, the second channel 37, and the exhaust channel 33 are connected.

[0061] Specifically, a valve plug 34 with a larger inner diameter is formed at the bottom of the second valve 8. When the second valve 8 descends below the initial position, the valve plug 34 disengages from the first valve 7, and hydrogen can enter the exhaust channel 33.

[0062] The bottle valve 6 of this invention includes two first valves 7 and a second valve 8. During the filling process, the entire bottle valve 6 can be removed. During the venting process, only the second valve 8 needs to be unscrewed. The locking block 31 can effectively restrict the movement of the first valve 7 and prevent it from popping out of the bottle mouth due to excessive pressure. The valve plug 34 can also prevent the second valve 8 from popping out of the first valve 7 due to excessive pressure. At the same time, the valve plug 34 and the (first channel 36 and second channel 37) make the exhaust channel 33 have two sealing structures, improving the sealing effect.

[0063] In one embodiment, the first valve 7, the second valve 8, the valve plug 34, and the valve seat 4 may be provided with several gaskets 5 to increase airtightness.

[0064] In one embodiment, the baffle 3 is hollow at the opening of the can 1 to facilitate the entry and exit of gas into the inner liner 2.

[0065] In one embodiment, the first elastic element 30, the second elastic element, and the third elastic element include, but are not limited to, springs, torsion springs, etc., which can be selected according to actual installation requirements.

[0066] In one embodiment, the tank body 1 is made of materials including, but not limited to, carbon fiber and fiberglass layers.

[0067] Working principle: When gas needs to be added, remove the bottle valve 6 and inject hydrogen into the bottle opening of the inner liner 2. The hydrogen enters the first space 40 and the second space 41, creating pressure on the extrusion part 25. The hydrogen enters the annular sleeve 19 through the connecting pipe 18, which drives the annular push plate 35 to move upward. This causes the pressure block 20 to apply extrusion force to the deformation block 23, thereby using the thinner part of the valve seat 4 to clamp the other side of the bottle opening of the inner liner 2. After the push block 27 moves upward, it will drive the locking block 28 to move in the direction perpendicular to the bottle opening, so that the locking block 31 extends into this part of the space.

[0068] When the air pressure in the first space 40 and the second space 41 is greater than the preset pressure of the cylinder 14, the air pressure drives the pressure diaphragm 17 and the output end of the cylinder 14 to move, and drives the slide plate 11 to move through the hinge rod 12, thereby closing the through hole 9. At this time, the air pressure in the second space 41 continues to increase, thereby applying pressure to the baffle 3, and finally transferring it to the bottle mouth of the inner liner 2.

[0069] After the gas filling is completed, the bottle valve 6 is placed into the bottle opening. At this time, the bottom of the first valve body first comes into contact with the locking block 31, and then comes into contact with the inclined surface of the locking block 31, causing the locking block 31 to retract into the locking block 28. Then, when the bottle valve 6 enters the bottom, the locking block 31 can be locked into the notch 32.

[0070] When gas needs to be released, the second valve 8 is turned downwards, causing the valve plug 34 to disengage from the first valve body, thus connecting the first channel 36 with the second channel 37, allowing hydrogen to be slowly released. When the gas pressure in the second space 41 drops to less than the gas pressure in the cylinder 14, the output end of the gas rod resets, the through hole 9 opens, and the hydrogen in the first space 40 can also be released. When the hydrogen is almost completely released, the annular push plate 35 will also descend and reset, and the locking block 28 will drive the locking block 31 to disengage from the recess 32, allowing the bottle valve 6 to be removed.

[0071] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A safe hydrogen storage tank, comprising a tank body (1), wherein an inner liner (2) is disposed within the tank body (1), characterized in that: The canister (1) is provided with a valve seat (4) and a valve (6) that can cooperate with the valve seat (4) at the bottle mouth. The inner liner (2) is provided with a baffle (3). A clamping space is formed between the baffle (3) and the valve seat (4) to clamp and seal the bottle mouth of the inner liner (2). The baffle (3) divides the inner liner (2) into a first space (40) and a second space (41) that can store gas. The baffle (3) provides a squeezing force toward the valve seat (4) through the air pressure in the second space (41) so as to reduce the volume of the clamping space. The baffle (3) includes a through hole (9), through which the first space (40) and the second space (41) are connected; and The opening and closing component (13) closes the through hole (9) when the air pressure is greater than the preset pressure. The baffle (3) includes a squeezing part (25), and the squeezing part (25) and the valve seat (4) form the clamping space. The squeezing part (25) is located in the first space (40). The squeezing part (25) includes a first squeezing surface (21) and a second squeezing surface (24). The squeezing force of the first squeezing surface (21) and the second squeezing surface (24) acting on the inner liner (2) is proportional to the air pressure of the first space (40). The opening and closing assembly (13) includes a cylinder (14), a pressure diaphragm (17), and a limiting member (10). The cylinder (14) provides the preset pressure. At least the output end of the cylinder (14) is located in the second space (41). A sealed space (16) is formed between the pressure diaphragm (17) and the baffle (3) to accommodate at least the output end of the cylinder (14). When the pressure on the pressure diaphragm (17) is greater than the preset pressure, the output end of the cylinder (14) is compressed and retracted to drive the limiting member (10) to close the through hole (9).

2. A safe hydrogen storage tank according to claim 1, characterized in that: The extrusion section (25) further includes a second extrusion surface (24). When the air pressure in the second space (41) is greater than the air pressure in the first space (40), the extrusion force exerted by the second extrusion surface (24) on the inner liner (2) is proportional to the air pressure in the second space (41).

3. A safe hydrogen storage tank according to claim 2, characterized in that: The first extrusion surface (21) and the second extrusion surface (24) form an angle of less than 180 degrees.

4. A safe hydrogen storage tank according to any one of claims 1-3, characterized in that: The extrusion section (25) is arranged in a ring around the mouth of the inner liner (2).

5. A safe hydrogen storage tank according to claim 1, characterized in that: It also includes a sealing assembly (22), which includes a deformable block (23) and a pressure block (20) arranged in annular shape. The deformable block (23) is embedded in the inner wall of the valve seat (4). The pressure block (20) is driven to move toward the deformable block (23) and provide a squeezing force acting on the deformable block (23), or is driven to reset and disengage from the deformable block (23). When the deformable block (23) is squeezed and deformed, it squeezes the valve seat (4) so ​​that the valve seat (4) provides a squeezing force acting on the bottle mouth of the inner liner (2) and opposite to the first squeezing surface (21).

6. A safe hydrogen storage tank according to claim 5, characterized in that: It also includes at least one locking component (29), which includes a push block (27), a locking block (28), a latching block (31), a first elastic element (30), and a second elastic element. The locking block (28) is slidably mounted on the valve seat (4). The first elastic element (30) connects the locking block (28) to the valve seat (4) and is used to reset the valve seat (4). The latching block (31) is slidably mounted inside the locking block (28). The second elastic element connects the latching block (31) to the locking block (28) and is used to reset the latching block (31). The push block (27) is driven to move the locking block (28) toward the bottle valve (6) so that the latching block (31) fixes the bottle valve (6). The end of the latching block (31) near the bottle valve (6) has an inclined surface facing the bottle opening.

7. A safe hydrogen storage tank according to claim 6, characterized in that: It also includes a drive assembly (38), which includes an annular sleeve (19) and an annular push plate (35). The annular push plate (35) is slidably installed in the annular sleeve (19). The annular sleeve (19) is connected to the first space (40) through a connecting pipe (18). The air pressure in the annular sleeve (19) changes with the air pressure in the first space (40) to drive the annular push plate (35) to move upward or descend to reset. When the annular push plate (35) is located above the reset point, it provides a driving force to drive the pressure block (20) and / or the push block (27).

8. A safe hydrogen storage tank according to claim 6, characterized in that: It also includes a bottle valve (6), which includes a first valve (7) and a second valve (8). The first valve (7) is sleeved on the outside of the second valve (8). The first valve (7) is detachably connected to the valve seat (4). The outside of the first valve (7) is provided with a notch (32) that can engage with the locking block (31). An exhaust channel (33) is provided inside the first valve (7). The second valve (8) is detachably disposed in the exhaust channel (33). The second valve (8) can open or close the exhaust channel (33) by moving along the exhaust channel (33).

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