Hydrogen supply device with pressure constant control system

Abstract

The invention discloses a hydrogen supply device with a pressure constant control system, and relates to the technical field of gas constant pressure. Comprising a gas cylinder, a mounting box is mounted at the upper end of the gas cylinder, a gas outlet rotating disc and a gas inlet rotating disc are rotationally arranged in the mounting box, rotating blocks are fixed to the gas outlet rotating disc and the gas inlet rotating disc correspondingly, a plurality of extrusion blocks are arranged on the outer sides of the rotating blocks, arc-shaped baffles are arranged on the two sides of the mounting box correspondingly, and a gas inlet peristaltic pipe and a gas outlet peristaltic pipe are arranged in the mounting box; and the air outlet turntable and the air inlet turntable are in transmission connection through a belt transmission pair. The gas outlet peristaltic pipe is extruded on the arc-shaped baffle through the extrusion block, gas in the gas outlet peristaltic pipe is driven to creep towards the outside of the gas cylinder, meanwhile, the belt transmission pair can drive the gas inlet rotating disc to rotate, external gas is pumped into the bottom space of the gas cylinder through the gas inlet peristaltic pipe, the internal gas pressure is kept stable, a nitrogen-sealed valve set and a sensor do not need to be connected, and operation is convenient. The pipeline is simpler, and the device is more convenient to use in synchronous gas supply of multiple gas cylinders.

Description

Technical Field

[0001] This invention relates to the field of gas constant pressure technology, specifically to a hydrogen supply device with a constant pressure control system. Background Technology

[0002] Hydrogen supply systems are crucial for ensuring the stable and safe delivery and use of hydrogen. Their core function is to provide a continuous and reliable hydrogen source for various hydrogen-using scenarios, such as chemical production, fuel cell vehicle refueling stations, and laboratory research. These systems store hydrogen in high-pressure or liquid hydrogen storage tanks, compress it to the required pressure using a compressor, and then precisely deliver and distribute the hydrogen through a sophisticated piping system and valve control. Some systems are also equipped with purification modules to further improve hydrogen quality, ensuring it meets the stringent purity requirements of different applications.

[0003] When supplying hydrogen via gas cylinders, the cylinders need to be connected to gas pipelines, such as the multi-cylinder series pipeline of the modular gas supply device with patent publication number CN213777279U. This includes a manifold and multiple gas supply modules connected to the manifold. Each gas supply module consists of a primary branch pipe, a five-way connector, four secondary branch pipes, and four gas cylinders. The manifold is connected to the primary branch pipe. The primary and secondary branch pipes are connected to the five-way connector. A switch valve is installed on the primary branch pipe, allowing each gas supply module to operate relatively independently, improving safety. Especially in the event of a leak, shutting down the leaking module preserves other normal gas supply modules. Furthermore, some gas supply modules can be selected to operate while others are shut down, increasing flexibility in use.

[0004] When supplying hydrogen, it is necessary to ensure uniform delivery. When using the gas supply tank (cylinder), it is necessary to ensure the stability of its internal gas pressure. When the gas pressure drops, high-purity nitrogen needs to be filled into the tank through the nitrogen sealing valve group. In the above-mentioned devices and the existing multi-cylinder connection pipelines, each tank needs to be equipped with a nitrogen sealing valve group and a sensor, which is costly and the pipelines are cumbersome and inconvenient to use. Summary of the Invention

[0005] The purpose of this invention is to provide a hydrogen supply device with a constant pressure control system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen supply device with a constant pressure control system, comprising a gas cylinder, an installation box mounted on the upper end of the gas cylinder, an outlet pipe and an inlet pipe connected to the bottom of the installation box, the bottom of the outlet pipe communicating with the interior of the gas cylinder, a piston slidably mounted inside the gas cylinder, the lower end of the inlet pipe connected to the piston and communicating with the space at the lower end of the piston, an outlet turntable and an inlet turntable rotatably mounted inside the installation box, each with a fixed rotating block, several circumferentially distributed compression blocks on the outer side of the rotating blocks, arc-shaped baffles on both sides of the installation box, a first connecting pipe and a second connecting pipe fixed on the top of the installation box, an inlet peristaltic pipe connected between the inlet pipe and the first connecting pipe, an outlet peristaltic pipe connected between the outlet pipe and the second connecting pipe, the inlet peristaltic pipe and the outlet peristaltic pipe being distributed along the inner side of the arc-shaped baffles, the outlet turntable and the inlet turntable being connected by a belt drive pair, and a drive assembly inside the installation box for driving the outlet turntable to rotate.

[0007] Preferably, the drive assembly includes a transmission block rotatably mounted on the side wall of the mounting box, with a connecting hole on the outer side of the transmission block and a transmission rod connected to the inner side. The belt drive pair includes a pulley fixed on the air outlet turntable, and the transmission rod is fixedly connected to the pulley. A drive motor is mounted on the outer side of the mounting box, and a connecting pin matching the connecting hole is connected to the output shaft of the drive motor via a coupling.

[0008] Preferably, the intake turntable has several circumferentially distributed grooves on the side away from the rotating block, and a slider is slidably disposed in the groove. A support rod is fixed on the slider. The belt drive pair includes a drive belt, which is wound around the outside of the support rod. An adjustment component is provided inside the mounting box for adjusting the position of the slider, and a tensioning component is provided inside the mounting box for tightening the drive belt.

[0009] Preferably, the adjusting assembly includes a sliding rod slidably inserted into the bottom of the mounting box, with the lower end of the sliding rod extending into the gas cylinder. A sealing ring is provided at the contact position between the gas cylinder and the sliding rod. A triangular push block is fixed to the upper end of the sliding rod. A pressing rod is slidably disposed on the side wall of the mounting box. An elongated slot is provided on the pressing rod, and the triangular push block is inserted into the elongated slot. A frustum pressing component is rotatably connected to the end of the pressing rod. A ramp is provided at the end of the support rod, and the ramp abuts against the side of the frustum pressing component. A compression spring is provided on the sliding rod for pressing the sliding rod downward.

[0010] Preferably, the triangular push block has connecting blocks on both sides, an n-shaped pressure block at the top of the triangular push block, and the bottom of the n-shaped pressure block is fixed to the connecting block. A baffle is provided at the top of the n-shaped pressure block, and a compression spring is located above the baffle. An opening and closing cover is hinged to the side of the mounting box. A locking nut is fixed to the top inner wall of the mounting box, and the bottom of the opening and closing cover is hinged to the mounting box. The top end of the opening and closing cover is connected to the locking nut by a connecting bolt. The top end of the compression spring abuts against the upper inner wall of the opening and closing cover, and reinforcing ribs are provided on both sides of the opening and closing cover.

[0011] Preferably, the tensioning assembly includes a swing arm hinged to the bottom of the mounting box, a tensioning wheel rotatably connected to the upper end of the swing arm, the tensioning wheel abutting against the inner side of the drive belt, and a tensioning member connected to the lower part of the swing arm, the lower end of the tensioning member being connected to the bottom of the mounting box.

[0012] Preferably, both ends of the inlet peristaltic tube and the outlet peristaltic tube are connected by quick-connect couplings. A detachable side cover is provided on one side of the mounting box, and connecting plates are fixed on both sides of the side cover. An opening slot is provided on the connecting plate, and a stud matching the opening slot is provided on the side end of the mounting box. A clamping nut is threaded onto the stud for fixing the connecting plate.

[0013] Preferably, the rotating block has several circumferentially distributed strip grooves, the extrusion block is cylindrical and both ends are rotatably connected to connecting rods, a moving block is fixed between the connecting rods, and the moving block is slidably disposed in the strip grooves at the corresponding positions. A square groove is provided in the middle position of the rotating block, and a support block is provided on the outer side of the rotating block. A square block is fixed to the side end of the support block and is inserted into the square groove. The side end of the support block abuts against the end of the connecting rod, and the outer side abuts against the inner wall of the side cover plate.

[0014] Preferably, a support plate is provided between the outer side of the arc-shaped baffle and the side wall of the mounting box, and a positioning groove is provided on the arc-shaped baffle, with both the inlet peristaltic tube and the outlet peristaltic tube located in the positioning groove.

[0015] Preferably, the support rod is supported by iron material, and a magnetic block is embedded inside the truncated cone extrusion part.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The drive assembly rotates the rotating block on the outlet turntable, and the squeezing block presses the outlet peristaltic tube against the arc-shaped baffle, causing the gas inside to peristalse towards the outside of the gas cylinder. At the same time, the belt drive pair drives the inlet turntable to rotate, pumping outside gas into the bottom space of the gas cylinder through the inlet peristaltic tube. The piston separates the incoming air from the hydrogen inside the gas cylinder. The inlet and outlet are synchronized, maintaining a stable gas pressure inside the gas cylinder. There is no need to connect a nitrogen sealing valve assembly and a sensor to the gas cylinder, making the pipeline connection simpler and more convenient to use when multiple gas cylinders are supplied simultaneously.

[0017] Meanwhile, when the gas pressure inside the cylinder increases, the pressure will push the sliding rod upward. At this time, the triangular push block will move upward and push the extrusion rod towards the air intake turntable. The support rod that abuts against the side of the truncated cone extrusion part will be opened. At this time, the transmission ratio of the belt drive pair will decrease, which can reduce the rotation speed of the air intake turntable, thereby reducing the air intake volume and achieving gas pressure balance. Similarly, when the gas pressure inside the cylinder decreases, the air intake volume can be increased to achieve gas pressure balance.

[0018] In addition, the side cover can be removed outward by loosening the clamping nut, and the inlet and outlet peristaltic tubes can be quickly replaced through the quick-connect structure. The cover is fixed by the connecting bolts and can be opened to replace the compression spring, making it convenient to replace internal parts and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall axonometric structure of the present invention; Figure 2 This is a schematic diagram of the mounting box in this invention; Figure 3 This is a cross-sectional view of the gas cylinder in this invention. Figure 4 This is a schematic diagram of the internal disassembled structure of the mounting box in this invention; Figure 5 This is a schematic diagram of the disassembled structure of the rotating block in this invention; Figure 6 This is a schematic diagram of the structure of the driving component and the tensioning component in this invention; Figure 7 This is a schematic diagram of the drive motor in this invention; Figure 8 This is a schematic diagram of the structure of the adjustment component in this invention; Figure 9 This is a schematic diagram of the disassembled structure of the adjustment component in this invention.

[0020] In the diagram: 1. Gas cylinder; 2. Mounting box; 3. Gas outlet pipe; 4. Piston; 5. Gas inlet pipe; 6. Gas inlet turntable; 7. Gas outlet turntable; 8. Arc-shaped baffle; 9. First connecting pipe; 10. Second connecting pipe; 11. Gas inlet peristaltic pipe; 12. Gas outlet peristaltic pipe; 13. Rotating block; 14. Extrusion block; 15. Belt drive pair; 16. Pulley; 17. Transmission rod; 18. Transmission block; 19. Connecting hole; 20. Drive motor; 21. Coupling; 22. Connecting pin; 23. Slide groove; 24. Slider; 25. Support rod; 26. Sliding rod; 27. 28. Triangular push block; 29. ​​Extrusion rod; 30. Long slot; 31. Frustum extrusion part; 32. Ramp; 33. Extrusion spring; 34. Connecting block; 35. N-shaped pressure block; 36. Opening and closing cover; 37. Reinforcing rib; 38. Locking nut; 39. Connecting bolt; 40. Baffle; 41. Swing rod; 42. Tensioning wheel; 43. Tensioning component; 44. Side cover plate; 45. Connecting plate; 46. Opening slot; 47. Stud; 48. Connecting rod; 49. Moving block; 50. Strip groove; 51. Square groove; 52. Support block; 53. Positioning groove; 54. Support plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-9 As shown, the present invention provides a technical solution: a hydrogen supply device with a constant pressure control system, comprising a gas cylinder 1, an installation box 2 mounted on the upper end of the gas cylinder 1, an outlet pipe 3 and an inlet pipe 5 connected to the bottom of the installation box 2, and the bottom of the outlet pipe 3 communicating with the interior of the gas cylinder 1, a piston 4 slidably disposed inside the gas cylinder 1, the lower end of the inlet pipe 5 being connected to the piston 4 and communicating with the space at the lower end of the piston 4, an outlet turntable 7 and an inlet turntable 6 rotatably disposed inside the installation box 2, and a rotating block 13 fixed on both the outlet turntable 7 and the inlet turntable 6, with a rotating block 13 on the outer side of the rotating block 13. The mounting box 2 is equipped with several circumferentially distributed extrusion blocks 14. Arc-shaped baffles 8 are provided on both sides of the mounting box 2. A first connecting pipe 9 and a second connecting pipe 10 are fixed on the top of the mounting box 2. An air inlet peristaltic pipe 11 is connected between the air inlet pipe 5 and the first connecting pipe 9. An air outlet peristaltic pipe 12 is connected between the air outlet pipe 3 and the second connecting pipe 10. The air inlet peristaltic pipe 11 and the air outlet peristaltic pipe 12 are distributed along the inner side of the arc-shaped baffle 8. The air outlet turntable 7 and the air inlet turntable 6 are connected by a belt drive pair 15. The mounting box 2 is equipped with a drive assembly to drive the air outlet turntable 7 to rotate.

[0023] It should be noted that during use, the drive assembly drives the outlet turntable 7 and the connected rotating block 13 to rotate. The squeezing block 14 on the rotating block 13 will squeeze the outlet peristaltic tube 12 onto the arc-shaped baffle 8, and drive the gas inside it to peristalse towards the outside of the gas cylinder 1. The outlet speed is adjusted by the rotation speed of the outlet turntable 7. At the same time, the belt drive pair 15 will drive the inlet turntable 6 to rotate, and pump the outside gas into the bottom space of the gas cylinder 1 through the inlet peristaltic tube 11. The piston 4 separates the incoming air from the gas inside the gas cylinder 1. The inlet and outlet are carried out simultaneously to keep the gas pressure inside the gas cylinder 1 stable. There is no need to connect the nitrogen sealing valve group and sensor to the gas cylinder 1, the pipeline connection is simpler, and it is more convenient to use when multiple gas cylinders 1 are supplied with gas simultaneously.

[0024] like Figure 6 As shown, the drive assembly includes a transmission block 18 rotatably mounted on the side wall of the mounting box 2, with a connecting hole 19 on the outer side of the transmission block 18 and a transmission rod 17 connected to the inner side. The belt drive pair 15 includes a pulley 16 fixed on the air outlet turntable 7, and the transmission rod 17 is fixedly connected to the pulley 16. A drive motor 20 is provided on the outer side of the mounting box 2, and a connecting pin 22 matching the connecting hole 19 is connected to the output shaft of the drive motor 20 through a coupling 21.

[0025] It should be noted that in actual use, the drive motor 20 is installed at the installation position of the gas cylinder 1. When the gas cylinder 1 is installed, the connecting pin 22 will be inserted into the connecting hole 19, and the drive motor 20 will drive the transmission rod 17, the pulley 16 and the gas outlet turntable 7 to rotate.

[0026] like Figure 6 As shown, the intake turntable 6 has several circumferentially distributed grooves 23 on the side away from the rotating block 13, and a slider 24 is slidably arranged in the groove 23. A support rod 25 is fixed on the slider 24. The belt drive pair 15 includes a drive belt, which is wound around the outside of the support rod 25. An adjustment component is provided inside the mounting box 2 to adjust the position of the slider 24, and a tensioning component is provided inside the mounting box 2 to tighten the drive belt.

[0027] It should be noted that the tensioning component ensures the tension of the transmission belt, ensuring that the belt can always effectively transmit power. Moreover, the slider 24 can rotate along the slide groove 23, expanding or shrinking the radius of the circle formed by several support rods 25, thereby changing the transmission ratio of the belt drive pair 15. The position of the support rods 25 can be controlled by the adjustment component, so as to restore the position in time when the gas pressure inside the gas cylinder 1 changes.

[0028] like Figure 6 , Figure 8 and Figure 9As shown, the adjustment assembly includes a sliding rod 26 slidably inserted into the bottom of the mounting box 2, with the lower end of the sliding rod 26 extending into the gas cylinder 1. A sealing ring is provided at the contact position between the gas cylinder 1 and the sliding rod 26. A triangular push block 27 is fixed to the upper end of the sliding rod 26. A pressing rod 28 is slidably disposed on the side wall of the mounting box 2. A long slot 29 is provided on the pressing rod 28, and the triangular push block 27 is inserted into the long slot 29. A frustum pressing component 30 is rotatably connected to the end of the pressing rod 28. A ramp 31 is provided at the end of the support rod 25, and the ramp 31 abuts against the side of the frustum pressing component 30. A compression spring 32 is provided on the sliding rod 26 for pressing the sliding rod 26 downward.

[0029] It should be noted that by compressing the spring 32, the sliding rod 26 is pressed downward, so that the pressure of the spring 32 is consistent with the pressure of the gas pressure inside the gas cylinder 1 on the sliding rod 26. When the gas pressure inside the gas cylinder 1 increases, the gas pressure will press the sliding rod 26 upward. At this time, the triangular push block 27 will move upward and push the extrusion rod 28 towards the air intake turntable 6. At this time, the support rod 25 that abuts against the side of the truncated cone extrusion part 30 will be opened. At this time, the transmission ratio of the belt drive pair 15 becomes smaller, which can reduce the rotation speed of the air intake turntable 6, thereby reducing the air intake volume and achieving air pressure balance. Similarly, when the gas pressure inside the gas cylinder 1 decreases, the air intake volume can also be increased to achieve air pressure balance.

[0030] like Figure 2 , Figure 8 and Figure 9 As shown, connecting blocks 33 are provided on both sides of the triangular push block 27, and an n-shaped pressure block 34 is provided at the upper end of the triangular push block 27. The bottom of the n-shaped pressure block 34 is fixed to the connecting block 33. A baffle 39 is provided at the upper end of the n-shaped pressure block 34. The compression spring 32 is located above the baffle 39. An opening and closing cover 35 is hinged to the side end of the mounting box 2. A locking nut 37 is fixed on the inner wall of the top of the mounting box 2. The bottom of the opening and closing cover 35 is hinged to the mounting box 2, and the upper end is connected to the locking nut 37 by a connecting bolt 38. The upper end of the compression spring 32 abuts against the inner wall of the upper end of the opening and closing cover 35. Reinforcing ribs 36 are provided on both sides of the opening and closing cover 35.

[0031] It should be noted that the opening and closing cover 35 is fixed by the connecting bolt 38 and can be opened. After opening, the compression spring 32 can be replaced, which makes it convenient to use compression springs 32 with different spring coefficients for gas cylinders 1 with different internal air pressures. The compression spring 32 will press the sliding rod 26 downward through the n-shaped pressure block 34, so that the pressure at both ends of the sliding rod 26 is balanced.

[0032] like Figure 6As shown, the tensioning assembly includes a swing arm 40 hinged to the bottom of the mounting box 2. The upper end of the swing arm 40 is rotatably connected to a tension wheel 41, which abuts against the inner side of the drive belt. A tension member 42 is connected to the lower part of the swing arm 40, and the lower end of the tension member 42 is connected to the bottom of the mounting box 2.

[0033] It should be noted that by pulling the swing rod 40 downward through the tensioning member 42, the tensioning wheel 41 tightens the transmission belt, ensuring the normal transmission of the belt drive pair 15 when the position of the support rod 25 changes. The tensioning member 42 can be an elastic rope or a tension spring.

[0034] like Figure 2 and Figure 4 As shown, both ends of the inlet peristaltic tube 11 and the outlet peristaltic tube 12 are connected by quick-connect couplings. A detachable side cover plate 43 is provided on one side of the mounting box 2, and connecting plates 44 are fixed on both sides of the side cover plate 43. An opening slot 45 is provided on the connecting plate 44. A stud 46 matching the opening slot 45 is provided on the side end of the mounting box 2. A clamping nut is threaded on the stud 46 for fixing the connecting plate 44.

[0035] It should be noted that the inlet peristaltic tube 11 and the outlet peristaltic tube 12 are prone to aging and damage due to prolonged compression. The side cover plate 43 can be removed outward by loosening the clamping nut, and the inlet peristaltic tube 11 and the outlet peristaltic tube 12 can be quickly replaced through the quick-connect structure.

[0036] like Figure 5 As shown, the rotating block 13 has several circumferentially distributed strip grooves 49. The extrusion block 14 is cylindrical and has connecting rods 47 rotatably connected to both ends. A moving block 48 is fixed between the connecting rods 47 and is slidably disposed in the corresponding strip grooves 49. A square groove 50 is provided in the middle of the rotating block 13, and a support block 51 is provided on the outer side of the rotating block 13. A square block is fixed to the side end of the support block 51 and is inserted into the square groove 50. The side end of the support block 51 abuts against the end of the connecting rod 47, and the outer side abuts against the inner wall of the side cover plate 43.

[0037] It should be noted that when replacing the inlet peristaltic tube 11 and the outlet peristaltic tube 12, first pull the support block 51 outward, and then retract the connecting rod 47, the moving block 48, and the squeezing block 14 inward to release the inlet peristaltic tube 11 and the outlet peristaltic tube 12, making the replacement simpler. After replacement, the support block 51 can be reinserted, and the squeezing block 14 can be opened and squeezed onto the inlet peristaltic tube 11 and the outlet peristaltic tube 12. When rotating, the squeezing block 14 can rotate, thereby reducing the friction between it and the inlet peristaltic tube 11 or the outlet peristaltic tube 12, and reducing wear.

[0038] like Figure 4As shown, a support plate 53 is provided between the outer side of the arc-shaped baffle 8 and the side wall of the mounting box 2, and a positioning groove 52 is provided on the arc-shaped baffle 8, and the air inlet peristaltic tube 11 and the air outlet peristaltic tube 12 are both located in the positioning groove 52.

[0039] It is important to note that the support plate 53 prevents the arc-shaped baffle 8 from deforming, and the positioning groove 52 improves the stability of the inlet peristaltic tube 11 and the outlet peristaltic tube 12, preventing them from shifting, thereby improving the operational stability of the equipment. like Figure 6 and Figure 9 As shown, the support rod 25 is supported by iron material, and a magnetic block is embedded inside the truncated cone extrusion part 30.

[0040] It should be noted that the support rod 25 is attracted by the magnetic block to prevent it from sliding down the slide groove 23 and causing the device to jam.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A hydrogen supply device with a pressure constant control system, comprising a gas cylinder (1), characterized in that: The upper end of the gas cylinder (1) is provided with a mounting box (2), the bottom of the mounting box (2) is connected with an air outlet pipe (3) and an air inlet pipe (5), the bottom of the air outlet pipe (3) is communicated with the inside of the gas cylinder (1), the inside of the gas cylinder (1) is slidably provided with a piston (4), the lower end of the air inlet pipe (5) is connected with the piston (4) and communicated with the space below the piston (4), the inside of the mounting box (2) is rotatably provided with an air outlet rotary disc (7) and an air inlet rotary disc (6), the air outlet rotary disc (7) and the air inlet rotary disc (6) are both fixedly provided with a rotating block (13), the outer side of the rotating block (13) is provided with a plurality of circumferentially distributed extrusion blocks (14), the two sides of the mounting box (2) are both provided with an arc-shaped baffle (8), the top of the mounting box (2) is fixedly provided with a first connecting pipe (9) and a second connecting pipe (10), the air inlet pipe (5) and the first connecting pipe (9) are connected with an air inlet peristaltic pipe (11), the air outlet pipe (3) and the second connecting pipe (10) are connected with an air outlet peristaltic pipe (12), the air inlet peristaltic pipe (11) and the air outlet peristaltic pipe (12) are distributed along the inner side of the arc-shaped baffle (8), the air outlet rotary disc (7) and the air inlet rotary disc (6) are drivingly connected through a belt transmission pair (15), the inside of the mounting box (2) is provided with a driving assembly for driving the air outlet rotary disc (7) to rotate.

2. The hydrogen supply device with a pressure constant control system according to claim 1, characterized by: The driving assembly comprises a transmission block (18) rotatably arranged on the side wall of the mounting box (2), a connecting hole (19) is formed in the outer side of the transmission block (18), a transmission rod (17) is connected to the inner side of the transmission block (18), the belt transmission pair (15) comprises a belt pulley (16) fixed on the air outlet rotary disc (7), the transmission rod (17) is fixedly connected with the belt pulley (16), a driving motor (20) is arranged on the outer side of the mounting box (2), a connecting pin (22) matched with the connecting hole (19) is connected to the output shaft of the driving motor (20) through a shaft coupling (21).

3. The hydrogen supply device with a pressure constant control system according to claim 1, characterized by: The air inlet rotary disc (6) is provided with a plurality of circumferentially distributed sliding grooves (23) on the side away from the rotating block (13), a sliding block (24) is slidably arranged in the sliding groove (23), a supporting rod (25) is fixedly arranged on the sliding block (24), the belt transmission pair (15) comprises a transmission belt, the transmission belt is arranged on the outer side of the supporting rod (25), an adjusting assembly is arranged in the mounting box (2) for adjusting the position of the sliding block (24), and a tensioning assembly is arranged in the mounting box (2) for tensioning the transmission belt.

4. The hydrogen supply device with a pressure constant control system according to claim 3, characterized by: The adjusting assembly comprises a sliding rod (26) slidingly arranged at the bottom of the mounting box (2), the lower end of the sliding rod (26) extends into the gas cylinder (1), and a sealing ring is arranged at the position where the gas cylinder (1) contacts the sliding rod (26), the upper end of the sliding rod (26) is fixed with a triangular push block (27), an extrusion rod (28) is slidingly arranged on the side wall of the mounting box (2), a long notch (29) is formed in the extrusion rod (28), the triangular push block (27) is arranged in the long notch (29), the end of the extrusion rod (28) is rotatably connected with a circular table extrusion piece (30), the end of the supporting rod (25) is provided with a slope (31), and the slope (31) abuts against the side surface of the circular table extrusion piece (30), and the sliding rod (26) is provided with an extrusion spring (32) for extruding the sliding rod (26) downward.

5. The hydrogen supply device with a pressure constant control system according to claim 4, characterized by: The two sides of the triangular push block (27) are provided with connecting blocks (33), the upper end of the triangular push block (27) is provided with an n-shaped pressing block (34), the bottom of the n-shaped pressing block (34) is fixed with the connecting blocks (33), the upper end of the n-shaped pressing block (34) is provided with a baffle (39), the extrusion spring (32) is located above the baffle (39), the side end of the mounting box (2) is hingedly connected with an opening and closing cover (35), the inner wall of the top of the mounting box (2) is fixed with a locking nut (37), the bottom of the opening and closing cover (35) is hingedly connected with the mounting box (2), the upper end is connected with the locking nut (37) through a connecting bolt (38), the upper end of the extrusion spring (32) abuts against the inner wall of the upper end of the opening and closing cover (35), and the two sides of the opening and closing cover (35) are provided with reinforcing ribs (36).

6. The hydrogen supply apparatus having a pressure constant control system according to claim 3, characterized by: The tensioning assembly comprises a swing rod (40) hingedly connected at the bottom of the mounting box (2), the upper end of the swing rod (40) is rotatably connected with a tensioning wheel (41), the tensioning wheel (41) abuts against the inner side of the driving belt, and the lower end of the swing rod (40) is connected with a tensioning piece (42).

7. The hydrogen supply apparatus having a pressure constant control system according to claim 1, characterized by: The two ends of the air inlet peristaltic tube (11) and the air outlet peristaltic tube (12) are connected through quick connectors, one side of the mounting box (2) is provided with a detachable side cover plate (43), the two sides of the side cover plate (43) are fixed with connecting plates (44), the connecting plates (44) are provided with opening grooves (45), the side end of the mounting box (2) is provided with threaded studs (46) matched with the opening grooves (45), the threaded studs (46) are threadedly connected with clamping nuts for fixing the connecting plates (44).

8. The hydrogen supply device with a pressure constant control system according to claim 7, characterized by: The rotating block (13) is provided with a plurality of circumferentially distributed strip-shaped grooves (49), the extruding block (14) is in a cylindrical shape, both ends of the extruding block (14) are rotationally connected with connecting rods (47), the connecting rods (47) are fixed with a moving block (48), the moving block (48) is slidably arranged in the corresponding strip-shaped groove (49), a square groove (50) is arranged at the middle position of the rotating block (13), a supporting block (51) is arranged at the outer side of the rotating block (13), the side end of the supporting block (51) is fixed with a square block, the square block is inserted into the square groove (50), and the side end of the supporting block (51) abuts against the end of the connecting rod (47), and the outer side abuts against the inner wall of the side cover plate (43).

9. The hydrogen supply apparatus having a pressure constant control system according to claim 1, characterized by: The outer side of the arc-shaped baffle (8) and the side wall of the mounting box (2) are provided with a supporting piece (53), the arc-shaped baffle (8) is provided with a positioning groove (52), and the air inlet peristaltic tube (11) and the air outlet peristaltic tube (12) are located in the positioning groove (52).

10. The hydrogen supply apparatus having a pressure constant control system according to claim 4, characterized by: The supporting rod (25) is supported by an iron material, and the circular table extruding piece (30) is embedded with a magnetic block.

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