Hydrogen storage device capable of adjusting internal pressure

Abstract

The utility model provides a hydrogen storage device capable of adjusting internal pressure. A hydrogen conveying assembly is arranged at the upper end of one side of the bottom plate and comprises a hydrogen conveying opening and a push rod, the hydrogen conveying opening is formed in the upper end of one side of the bottom plate, the push rod is arranged on the inner wall of the hydrogen conveying opening, a stepping motor is connected to the outer wall of the upper end of the other side of the bottom plate through an air cylinder, and a disc assembly is arranged at the output end of the stepping motor. The disc assembly comprises a disc, placing grooves and first positioning grooves, the disc is arranged at the output end of the stepping motor, four sets of symmetrical placing grooves are evenly formed in the outer wall of the disc, and the first positioning grooves are formed in the upper ends of the four sets of placing grooves. By arranging the disc assembly and the placing assembly, under the driving of the stepping motor and the air cylinder, the position changing of the placing frame can be completed, so that in the inflation process, a worker can place a tank needing to be inflated on the placing frame within time, subsequent inflation is facilitated, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen storage, and in particular relates to a hydrogen storage device capable of adjusting internal pressure. Background Art

[0002] Hydrogen is a colorless gas with a lower density than air. Since hydrogen is insoluble in water, it can be collected by the water-discharge gas collection method. In addition, at a standard atmospheric pressure and a temperature of -252.87°C, hydrogen can be converted into a colorless liquid. At room temperature, the properties of hydrogen are very stable and it is not easy to react chemically with other substances.

[0003] At present, when hydrogen is stored in a hydrogen storage tank, there is no device to lock the hydrogen storage tank. As a result, if shaking occurs during the hydrogen storage process, it is easy to cause leakage, which is dangerous. When workers are filling the empty hydrogen tank, they need to support the storage tank to stabilize it and avoid shaking, so they cannot take out the time to take out the unfilled storage tank for subsequent filling, which leads to low work efficiency. Therefore, it is necessary to provide a new hydrogen storage device with adjustable internal pressure to solve the above technical problems. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a hydrogen storage device capable of adjusting the internal pressure.

[0005] In order to solve the above technical problems, the utility model provides a hydrogen storage device with adjustable internal pressure, comprising: a bottom plate, a hydrogen delivery component is arranged at the upper end of one side of the bottom plate, the hydrogen delivery component comprises a hydrogen delivery port and a push rod, a hydrogen delivery port is arranged at the upper end of one side of the bottom plate, and a push rod is arranged on the inner wall of the hydrogen delivery port, an outer wall of the upper end of the other side of the bottom plate is connected to a stepper motor through a cylinder, and a disc component is arranged at the output end of the stepper motor, the disc component comprises a disc, a placement groove and a first positioning groove, a disc is arranged at the output end of the stepper motor, and the outer wall of the disc is evenly provided with four groups of symmetrical placement grooves, and the upper ends of the four groups of placement grooves are all provided with a first positioning groove, and four groups of symmetrical positioning grooves are arranged around the outer wall of the upper end of the disc A limiting component, wherein four groups of placement components are evenly arranged symmetrically around the outer wall of one end of the disk close to the stepper motor, and the placement component includes a placement rack and a second positioning groove. Four groups of placement racks are evenly arranged symmetrically around the outer wall of one end of the disk close to the stepper motor, and the inner walls of the placement racks are all provided with second positioning grooves; a hydrogen storage component, wherein the hydrogen storage component is inserted into the inner wall of the placement rack, and the hydrogen storage component includes a hydrogen storage tank, a pressure reducer, a positioning rod and a conical block. A hydrogen storage tank is inserted into the inner wall of the placement rack, and a pressure reducer is provided on the outer wall of the hydrogen storage tank, a positioning rod is provided on the outer wall of the hydrogen storage tank, and a conical block is provided on the upper end of the outer wall of the hydrogen storage tank; an air intake component, wherein the air intake component is arranged at the front end port of the hydrogen storage tank.

[0006] As a further solution of the utility model, the four groups of placement grooves are symmetrically distributed with the center of the disk as the center, the angle between the centers of every two adjacent groups of placement grooves and the center of the disk is °, and the opening directions of the first positioning grooves in each group are perpendicular to each other.

[0007] As a further scheme of the utility model, the limiting component includes a connecting rod, a socket, a limiting rod, a first spring, an inclined surface, and a connecting plate. Four groups of symmetrical connecting rods are evenly arranged around the outer wall of the upper end of the disc, and the four groups of connecting rods are symmetrically distributed with the disc as the center of the circle. A socket is provided at the lower end of the connecting rod, and a limiting rod is slidably inserted at the upper end of the connecting rod. The first spring is sleeved on the outer wall of the upper end of the limiting rod, and the upper and lower ends of the first spring are respectively fixedly connected to the upper end surface of the connecting rod and the upper end surface of the limiting rod. The lower end of the limiting rod is provided with an inclined surface, and the upper end surface of the disc is rotatably connected to a rotating wheel through a connecting plate, and the rotating wheel and the limiting rod located at the lower end of the connecting rod are engaged with each other.

[0008] As a further solution of the utility model, each group of the placement racks and the placement slots correspond one to one, and each group of the first positioning slots and the second positioning slots correspond one to one.

[0009] As a further solution of the utility model, a tooth plate is provided on the upper side of one end of the bottom plate close to the cylinder, a socket that cooperates with the tooth plate is opened at the lower end of the connecting rod, and the front end of the tooth plate is meshed with the rotating wheel.

[0010] As a further solution of the utility model, the positioning rod is slidably inserted in the first positioning groove, the positioning rod is slidably inserted in the second positioning groove, the conical block is configured as a truncated cone, and the outer wall of the conical block is configured as a smooth curved surface matching the inclined surface.

[0011] As a further scheme of the utility model, the air intake assembly includes an air inlet, a vent plate, a second sliding rod, a sealing plug and a second spring. The inner wall of the air inlet is provided with a vent plate, and a plurality of groups of through holes are evenly penetrated through the outer wall of the vent plate. A second sliding rod is movably inserted into the middle end of the vent plate, and a sealing plug is provided at the front end of the second sliding rod. The sealing plug is truncated in a cone shape, and a truncated cone-shaped slide groove matching the sealing plug is provided on the inner wall of the front end of the air inlet. A second spring is provided on the outer wall of the second sliding rod, and both ends of the second spring are respectively fixedly connected to the sealing plug and the vent plate, and a sealing gasket is fixedly provided on the outer wall of the front end of the air inlet.

[0012] As a further solution of the utility model, two symmetrical groups of first sliding rods are arranged on the upper end of the bottom plate, and a sliding plate is provided on the sliding sleeve of the outer wall of the first sliding rod. The end of the sliding plate close to the disc is rotatably connected to a rotating rod, and the rotating rod is fixedly connected to the midpoint of the disc.

[0013] Compared with the related art, the hydrogen storage device with adjustable internal pressure provided by the utility model has the following beneficial effects:

[0014] 1. The utility model is provided with a limiting component, which can lock the hydrogen storage tank placed on the placement rack, thereby ensuring the stability of the hydrogen storage tank during the inflation process, avoiding the danger of hydrogen leakage caused by the storage tank shaking during the inflation process, thereby increasing the safety of the device.

[0015] 2. The utility model is provided with a disc assembly and a placement assembly, and driven by a stepper motor and a cylinder, the placement rack can be replaced. Therefore, during the inflation process, workers can take time to place the cans that need to be inflated on the placement rack, which is convenient for subsequent inflation and increases work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0018] Figure 2 This is a schematic diagram of the overall side view structure of a hydrogen storage device capable of adjusting the internal pressure of the utility model;

[0019] Figure 3 This is a schematic cross-sectional structure diagram of a hydrogen transport component of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a disc assembly of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of limited components of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of a hydrogen storage component of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0023] Figure 7 This is a schematic cross-sectional structure diagram of an air intake assembly of a hydrogen storage device capable of adjusting internal pressure according to the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the placement components of a hydrogen storage device with adjustable internal pressure according to the utility model.

[0025] In the figure: 1, bottom plate; 2, first slide bar; 3, hydrogen delivery assembly; 31, hydrogen delivery port; 32, push rod; 4, cylinder; 5, stepper motor; 6, disc assembly; 61, disc; 62, placement groove; 63, first positioning groove; 7, limiting assembly; 71, connecting rod; 72, jack; 73, limiting rod; 74, first spring; 75, inclined plane; 76, connecting plate; 77, rotating wheel; 8, placement assembly; 81, placement rack; 82, second positioning groove; 9, tooth plate; 10, hydrogen storage assembly; 101, hydrogen storage tank; 102, pressure reducer; 103, positioning plug; 104, conical block; 11, air intake assembly; 111, air intake port; 112, vent disc; 113, second slide bar; 114, sealing plug; 115, second spring; 12, slide plate; 13, rotating rod. DETAILED DESCRIPTION

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 ,in, Figure 1 This is a schematic diagram of the overall structure of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 2 This is a schematic diagram of the overall side view structure of a hydrogen storage device capable of adjusting the internal pressure of the utility model; Figure 3 This is a schematic cross-sectional structure diagram of a hydrogen transport component of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 4 This is a schematic diagram of the structure of a disc assembly of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 5 This is a schematic diagram of the structure of limited components of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 6 This is a schematic diagram of the structure of a hydrogen storage component of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 7 This is a schematic cross-sectional structure diagram of an air intake assembly of a hydrogen storage device capable of adjusting internal pressure according to the utility model; Figure 8The present invention is a schematic diagram of the placement component structure of a hydrogen storage device with adjustable internal pressure. A hydrogen storage device with adjustable internal pressure, comprising: a bottom plate 1, a hydrogen delivery component 3 is arranged at the upper end of one side of the bottom plate 1, the hydrogen delivery component 3 comprises a hydrogen delivery port 31 and a push rod 32, a hydrogen delivery port 31 is arranged at the upper end of one side of the bottom plate 1, and a push rod 32 is arranged on the inner wall of the hydrogen delivery port 31, a stepper motor 5 is connected to the outer wall of the upper end of the other side of the bottom plate 1 through a cylinder 4, and a disc component 6 is arranged at the output end of the stepper motor 5, the disc component 6 comprises a disc 61, a placement groove 62 and a first positioning groove 63, a disc 61 is arranged at the output end of the stepper motor 5, and four symmetrical groups of placement grooves 62 are evenly opened on the outer wall of the disc 61, and the upper ends of the four groups of placement grooves 62 are all opened with a first positioning groove 63, four symmetrical groups of limiting components 7 are arranged around the outer wall of the upper end of the disc 61, and the outer wall of one end of the disc 61 close to the stepper motor 5 Four groups of placement components 8 are evenly arranged symmetrically around, and the placement components 8 include a placement rack 81 and a second positioning groove 82. Four groups of placement racks 81 are evenly arranged symmetrically around the outer wall of one end of the disk 61 close to the stepper motor 5, and the inner walls of the placement racks 81 are all provided with second positioning grooves 82; a hydrogen storage component 10, the hydrogen storage component 10 is inserted into the inner wall of the placement rack 81, the hydrogen storage component 10 includes a hydrogen storage tank 101, a pressure reducer 102, a positioning rod 103 and a conical block 104, the inner wall of the placement rack 81 is inserted with a hydrogen storage tank 101, and the outer wall of the hydrogen storage tank 101 is provided with a pressure reducer 102, the outer wall of the hydrogen storage tank 101 is provided with a positioning rod 103, and the upper end of the outer wall of the hydrogen storage tank 101 is provided with a conical block 104; an air intake component 11, the air intake component 11 is arranged at the front end port of the hydrogen storage tank 101.

[0027] Preferably, the four groups of placement grooves 62 are symmetrically distributed around the center of the disk 61, the angle between the center of each two adjacent groups of placement grooves 62 and the center of the disk 61 is 90°, and the opening directions of each group of first positioning grooves 63 are perpendicular to each other.

[0028] Preferably, the limiting assembly 7 includes a connecting rod 71, a socket 72, a limiting rod 73, a first spring 74, an inclined surface 75, and a connecting plate 76. Four symmetrical groups of connecting rods 71 ​​are evenly arranged around the outer wall of the upper end of the disk 61. The four groups of connecting rods 71 ​​are symmetrically distributed with the disk 61 as the center of the circle. A socket 72 is provided at the lower end of the connecting rod 71. A limiting rod 73 is slidably inserted at the upper end of the connecting rod 71, and a first spring 74 is sleeved on the outer wall of the upper end of the limiting rod 73. The upper and lower ends of the first spring 74 are respectively fixedly connected to the upper end surface of the connecting rod 71 and the upper end surface of the limiting rod 73. The lower end of the limiting rod 73 is provided with an inclined surface 75. The upper end surface of the disk 61 is rotatably connected to a rotating wheel 77 through a connecting plate 76. The rotating wheel 77 and the limiting rod 73 located at the lower end of the connecting rod 71 are meshed with each other. First, the hydrogen storage tank 101 to be inflated is passed through the positioning rod 1 03 passes through the placement groove 62 in turn and is placed on the upper end of the placement rack 81. Through the cooperation of the positioning rod 103 and the first positioning groove 63 and the second positioning groove 82, the conical block 104 gradually approaches the inclined surface 75. When the conical block 104 contacts the inclined surface 75, the inclined surface 75 slides along the smooth surface of the conical block 104, thereby driving the limiting rod 73 to slide upward along the connecting rod 71 and stretching the first spring 74. When the conical block 104 is away from the lower end of the inclined surface 75, under the action of the reverse elastic force of the first spring 74, the limiting rod 73 is driven to slide downward along the connecting rod 71. At this time, the hydrogen storage tank 101 cannot be pushed into the placement rack 81, and at the same time, the limiting rod 73 cooperates with the conical block 104 to limit the hydrogen storage tank 101, so that the hydrogen storage tank 101 cannot move and rotate, thereby ensuring the stability of the subsequent inflation process.

[0029] Preferably, each group of placement racks 81 corresponds to the placement slots 62 one by one, and each group of first positioning slots 63 corresponds to the second positioning slots 82 one by one.

[0030] Preferably, a tooth plate 9 is provided on the upper side of one end of the bottom plate 1 close to the cylinder 4, a socket 72 cooperating with the tooth plate 9 is provided at the lower end of the connecting rod 71, and the front end of the tooth plate 9 and the rotating wheel 77 are meshed with each other.

[0031] Preferably, the positioning rod 103 is slidably inserted in the first positioning groove 63, the positioning rod 103 is slidably inserted in the second positioning groove 82, the conical block 104 is set to a truncated cone shape, and the outer wall of the conical block 104 is set to a smooth curved surface that matches the inclined surface 75. After the inflation is completed, after the starting cylinder 4 drives the disc 61 to retract, the toothed plate 9 touches the rotating wheel 77, thereby driving the rotating wheel 77 to rotate. Since the rotating wheel 77 and the limiting rod 73 located at the lower end of the connecting rod 71 are meshed with each other, the rotating wheel drives the limiting rod 73 to move upward. When the inclined surface 75 at the lower end of the limiting rod 73 leaves the conical block 104, the limiting rod 73 is released. The hydrogen storage tank 101 is limited so that the staff can take out the hydrogen storage tank 101 after the filling is completed. After taking out the hydrogen storage tank 101, start the stepper motor 5 to rotate 90°, then stop the stepper motor 5, rotate the previously placed unfilled hydrogen storage tank 101 to the filling position corresponding to the hydrogen transmission component 3, and then start the cylinder 4 to drive the disc 61 toward the hydrogen transmission component 3 for filling. During the filling process, the empty hydrogen storage tank 101 can be placed at the position of the hydrogen storage tank 101 that has just been taken out, so that the hydrogen storage tank 101 that needs to be filled can be placed on the placement rack 81 during the filling process, thereby increasing work efficiency.

[0032] Preferably, the air intake assembly 11 includes an air inlet 111, a vent plate 112, a second slide rod 113, a sealing plug 114 and a second spring 115. The inner wall of the air inlet 111 is provided with the vent plate 112, and a plurality of through holes are evenly penetrated through the outer wall of the vent plate 112. A second slide rod 113 is movably inserted into the middle end of the vent plate 112, and a sealing plug 114 is provided at the front end of the second slide rod 113. The sealing plug 114 is truncated into a cone shape, and a truncated cone-shaped slide groove matching the sealing plug 114 is provided on the inner wall of the front end of the air inlet 111. A second spring 115 is sleeved on the outer wall of the second slide rod 113, and both ends of the second spring 115 are respectively fixedly connected to the sealing plug 114 and the vent plate 112, and a sealing gasket is fixedly sleeved on the outer wall of the front end of the air inlet 111. When it is necessary to inflate the placed hydrogen storage tank 101, the starter cylinder 4 pushes the disc 61 toward the hydrogen delivery port 31, and the sealing gasket enters along the hydrogen delivery port 31, so that the air inlet 111 enters into the hydrogen delivery port 31, and then the disc 61 continues to be moved. At this time, the push rod 32 contacts the sealing plug 114 and pushes the sealing plug 114 to move inside the air inlet 111, so that the sealing plug 114 compresses the second spring 115. When the sealing plug 114 leaves the truncated cone shaped slide groove opened in the air inlet 111, hydrogen is continuously input into the air inlet 111 and enters the hydrogen storage tank 101 through the through hole opened at the upper end of the vent disc 112. After the inflation is completed, the starter cylinder 4 drives the disc 61 to retract. When the push rod 32 leaves the sealing plug 114, under the reverse force of the second spring 115 and the internal pressure of the hydrogen storage tank 101, the second slide bar 113 drives the sealing plug 114 to close the air inlet 111 to complete the sealing operation.

[0033] Preferably, two symmetrical groups of first slide bars 2 are provided at the upper end of the bottom plate 1, and the sliding sleeve of the outer wall of the first slide bar 2 is provided with a slide plate 12, and the end of the slide plate 12 close to the disc 61 is rotatably connected to a rotating rod 13, and the rotating rod 13 is fixedly connected to the midpoint of the disc 61. The staff can judge the pressure inside the hydrogen storage tank 101 by observing the value on the pressure reducer 102. The pressure reducer 102 can reduce the higher pressure gas stored in the hydrogen storage tank 101 to low pressure gas, and should ensure that the required working pressure remains stable from beginning to end. In short, the pressure reducer 102 is a regulating device that reduces high pressure gas to low pressure gas and keeps the pressure and flow of the output gas stable and unchanged, so that the internal pressure of the hydrogen storage tank 101 can be kept stable by setting the pressure reducer 102.

[0034] The working principle of a hydrogen storage device with adjustable internal pressure provided by the utility model is as follows:

[0035] The first step: first, place the hydrogen storage tank 101 that needs to be inflated through the placement groove 62 in sequence to the upper end of the placement rack 81 through the positioning rod 103. Through the cooperation of the positioning rod 103 and the first positioning groove 63 and the second positioning groove 82, the conical block 104 gradually approaches the inclined surface 75. When the conical block 104 contacts the inclined surface 75, the inclined surface 75 slides along the smooth surface of the conical block 104, thereby driving the limiting rod 73 to slide upward along the connecting rod 71 and stretching the first spring 74. When the conical block 104 is away from the lower end of the inclined surface 75, under the action of the reverse elastic force of the first spring 74, the limiting rod 73 is driven to slide downward along the connecting rod 71. At this time, the hydrogen storage tank 101 cannot be pushed into the placement rack 81, and at the same time, the limiting rod 73 cooperates with the conical block 104 to limit the hydrogen storage tank 101, so that the hydrogen storage tank 101 cannot move and rotate. The cylinder 4 pushes the disc 61 toward the hydrogen delivery port 31, and the sealing gasket enters along the hydrogen delivery port 31, so that the air inlet 111 enters into the hydrogen delivery port 31, and then the disc 61 continues to move. At this time, the push rod 32 contacts the sealing plug 114 and pushes the sealing plug 114 to move inside the air inlet 111, so that the sealing plug 114 compresses the second spring 115. When the sealing plug 114 leaves the truncated cone shaped slide groove opened in the air inlet 111, hydrogen is continuously input into the air inlet 111, and enters the hydrogen storage tank 101 through the through hole opened at the upper end of the vent disc 112. After the inflation is completed, the start cylinder 4 drives the disc 61 to retract. When the push rod 32 leaves the sealing plug 114, under the reverse force of the second spring 115 and the internal pressure of the hydrogen storage tank 101, the second slide bar 113 drives the sealing plug 114 to close the air inlet 111 to complete the sealing operation.

[0036] Step 2: After the inflation is completed, after the starter cylinder 4 drives the disc 61 to retract, the tooth plate 9 touches the rotating wheel 77, thereby driving the rotating wheel 77 to rotate. Since the rotating wheel 77 and the limiting rod 73 at the lower end of the connecting rod 71 are meshed with each other, the rotating wheel drives the limiting rod 73 to move upward. When the inclined surface 75 at the lower end of the limiting rod 73 leaves the conical block 104, the limiting rod 73 releases the limitation on the hydrogen storage tank 101, so that the staff can take out the hydrogen storage tank 101 after the inflation is completed. After the hydrogen storage tank 101 is placed, the stepper motor 5 is started and rotated 90°, and then the stepper motor 5 is stopped, and the previously placed uninflated hydrogen storage tank 101 is rotated to the inflation position corresponding to the hydrogen transmission component 3, and then the cylinder 4 is started to drive the disc 61 toward the hydrogen transmission component 3 for inflation. During the inflation process, the empty hydrogen storage tank 101 can be placed in the position of the hydrogen storage tank 101 just removed, so that the hydrogen storage tank 101 that needs to be inflated can be placed on the placement rack 81 during the inflation process.

[0037] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0038] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0039] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A hydrogen storage device with adjustable internal pressure, characterized in that: include: A bottom plate (1), wherein a hydrogen delivery component (3) is disposed at an upper end of one side of the bottom plate (1), wherein the hydrogen delivery component (3) comprises a hydrogen delivery port (31) and a push rod (32), wherein the hydrogen delivery port (31) is disposed at an upper end of one side of the bottom plate (1), and a push rod (32) is disposed on an inner wall of the hydrogen delivery port (31), wherein an outer wall of an upper end of the other side of the bottom plate (1) is connected to a stepper motor (5) via a cylinder (4), and a disc component (6) is disposed at an output end of the stepper motor (5), wherein the disc component (6) comprises a disc (61), a placement groove (62) and a first positioning groove (63), wherein a disc (61) is disposed at an output end of the stepper motor (5), and wherein the disc (61) is disposed at an output end of the stepper motor (5), and wherein the disc (61) is disposed at an inner wall ... ) an outer wall is evenly provided with four symmetrical groups of placement grooves (62), and the upper ends of the four groups of placement grooves (62) are all provided with first positioning grooves (63); four symmetrical groups of limiting components (7) are arranged around the outer wall of the upper end of the disk (61); four symmetrical groups of placement components (8) are evenly arranged around the outer wall of one end of the disk (61) close to the stepping motor (5); the placement components (8) include a placement rack (81) and a second positioning groove (82); four symmetrical groups of placement racks (81) are evenly arranged around the outer wall of one end of the disk (61) close to the stepping motor (5), and the inner walls of the placement racks (81) are all provided with second positioning grooves (82); A hydrogen storage assembly (10), the hydrogen storage assembly (10) being inserted into the inner wall of a placement rack (81), the hydrogen storage assembly (10) comprising a hydrogen storage tank (101), a pressure reducer (102), a positioning rod (103) and a conical block (104); the hydrogen storage tank (101) being inserted into the inner wall of the placement rack (81), the pressure reducer (102) being arranged on the outer wall of the hydrogen storage tank (101), the positioning rod (103) being arranged on the outer wall of the hydrogen storage tank (101), and the conical block (104) being arranged on the upper end of the outer wall of the hydrogen storage tank (101); An air intake component (11), wherein the air intake component (11) is arranged at a front end port of the hydrogen storage tank (101).

2. A hydrogen storage device with adjustable internal pressure according to claim 1, characterized in that: The four groups of placement grooves (62) are symmetrically distributed with the center of the disk (61) as the center, the angle between the center of each two adjacent groups of placement grooves (62) and the center of the disk (61) is 90°, and the opening directions of each group of the first positioning grooves (63) are perpendicular to each other.

3. A hydrogen storage device with adjustable internal pressure according to claim 2, characterized in that: The limiting assembly (7) comprises a connecting rod (71), a socket (72), a limiting rod (73), a first spring (74), an inclined surface (75), and a connecting plate (76). Four groups of connecting rods (71) are evenly arranged around the outer wall of the upper end of the disk (61). The four groups of connecting rods (71) are symmetrically distributed with the disk (61) as the center of the circle. The lower end of the connecting rod (71) is provided with a socket (72). The upper end of the connecting rod (71) is slidably inserted with a limiting rod (73). The limiting rod (73) is provided with a first spring (74) on the outer wall of the upper end of the limiting rod (73), and the upper and lower ends of the first spring (74) are respectively fixedly connected to the upper end surface of the connecting rod (71) and the upper end surface of the limiting rod (73), and the lower end of the limiting rod (73) is provided with an inclined surface (75). The upper end surface of the disk (61) is rotatably connected to a rotating wheel (77) through a connecting plate (76), and the rotating wheel (77) and the limiting rod (73) located at the lower end of the connecting rod (71) are meshed with each other.

4. A hydrogen storage device with adjustable internal pressure according to claim 2, characterized in that: Each group of the placement racks (81) and the placement slots (62) correspond one to one, and each group of the first positioning slots (63) and the second positioning slots (82) correspond one to one.

5. A hydrogen storage device with adjustable internal pressure according to claim 3, characterized in that: A toothed plate (9) is provided on the upper side of one end of the bottom plate (1) close to the cylinder (4), a socket (72) cooperating with the toothed plate (9) is provided at the lower end of the connecting rod (71), and the front end of the toothed plate (9) and the rotating wheel (77) are meshed with each other.

6. A hydrogen storage device with adjustable internal pressure according to claim 3, characterized in that: The positioning rod (103) is slidably inserted in the first positioning groove (63), and the positioning rod (103) is slidably inserted in the second positioning groove (82). The conical block (104) is configured to be a truncated cone, and the outer wall of the conical block (104) is configured to be a smooth curved surface that matches the inclined surface (75).

7. A hydrogen storage device with adjustable internal pressure according to claim 1, characterized in that: The air intake assembly (11) comprises an air intake port (111), a vent plate (112), a second slide bar (113), a sealing plug (114) and a second spring (115). The inner wall of the air intake port (111) is provided with the vent plate (112), and the outer wall of the vent plate (112) is evenly penetrated with a plurality of through holes. The middle end of the vent plate (112) is movably inserted with a second slide bar (113), and the front end of the second slide bar (113) is provided with a sealing plug (114). The sealing plug (114) is truncated cone-shaped. The inner wall of the front end of the air intake port (111) is provided with a truncated cone-shaped slide groove matching the sealing plug (114). The outer wall of the second slide bar (113) is sleeved with a second spring (115), and the two ends of the second spring (115) are respectively fixedly connected to the sealing plug (114) and the vent plate (112). The front end outer wall of the air intake port (111) is fixedly sleeved with a sealing gasket.

8. A hydrogen storage device with adjustable internal pressure according to claim 1, characterized in that: Two symmetrical groups of first sliding rods (2) are arranged at the upper end of the bottom plate (1), and a sliding plate (12) is provided on the outer wall sliding sleeve of the first sliding rod (2). One end of the sliding plate (12) close to the disc (61) is rotatably connected to a rotating rod (13), and the rotating rod (13) and the disc (61) are fixedly connected at the midpoint.

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