Automatic rotary filling device for hydrogen storage cylinder preparation

Abstract

The present invention relates to the technical field of hydrogen storage cylinder production equipment, and in particular to an automatic rotary gas filling device for preparing hydrogen storage cylinders. The automatic rotary gas filling device for preparing hydrogen storage cylinders comprises a first frame, a second frame, a cylinder liner, a gas guide shaft and a rotary joint. The cylinder liner, the gas guide shaft and the rotary joint are sequentially connected and supported by the first frame and the second frame. An air inlet pipe is provided at one end of the cylinder liner, and an air outlet pipe is provided at the other end. A one-way valve is provided at the beginning of the air inlet pipe of the cylinder liner, and a check valve is provided on the air outlet pipe; an inflation valve is provided at one end of the gas guide shaft close to the cylinder liner, and a rotary sealing valve is provided at one end away from the cylinder liner. The inflation valve is connected to the one-way valve, the rotary sealing valve is connected to the rotary joint, and the rotary joint is connected to the gas supply equipment. The present invention can not only ensure uniform tension between the layers of carbon fiber prepreg outside the cylinder liner, but also effectively prevent air leakage during the process of inflating the cylinder liner.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen storage gas cylinder production equipment, in particular to an automatic rotating gas filling device for preparing hydrogen storage gas cylinders. Background Art

[0002] Hydrogen fuel cell vehicles are widely regarded as the next generation of vehicles to solve energy and environmental problems due to their cleanliness, high energy utilization and zero greenhouse gas emissions. High-pressure gaseous hydrogen storage has become the dominant on-board hydrogen storage method due to its outstanding advantages such as simple structure, high mass hydrogen storage density, and fast filling and discharge speed.

[0003] The carbon fiber fully wrapped high-pressure hydrogen cylinder is a lightweight ultra-high-pressure gas cylinder with an aluminum alloy lining and a carbon fiber wrapped layer as the strength structural layer. The working pressure can reach 35MPa-70MPa. It is a high-pressure hydrogen storage container widely used in the international fuel cell field in recent years.

[0004] During the preparation of hydrogen storage cylinders, carbon fiber prepregs need to be evenly wound around the outer wall of the cylinder liner, and the tension between the layers of the carbon fiber prepregs needs to be uniform during the winding process. Therefore, the gas pressure filled into the cylinder liner needs to be constantly adjusted during the prepreg winding process. How to ensure that there is no leakage between the rotating cylinder liner and the equipment that fills the liner during the pressure adjustment process is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an automatic rotating inflation device for preparing hydrogen storage cylinders, which overcomes the shortcomings of the aforementioned prior art and can not only ensure uniform tension between the layers of carbon fiber prepreg outside the cylinder liner, but also effectively prevent leakage during the process of inflating the cylinder liner.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] An automatic rotating gas filling device for preparing a hydrogen storage gas cylinder comprises a first frame, a second frame, a gas cylinder liner, a gas guide shaft and a rotating joint, wherein the gas cylinder liner, the gas guide shaft and the rotating joint are sequentially connected and supported by the first frame and the second frame, wherein:

[0008] One end of the gas cylinder liner is provided with an air inlet pipe, and the other end is provided with an air outlet pipe. A one-way valve is provided at the beginning of the air inlet pipe of the gas cylinder liner, and a check valve is provided on the air outlet pipe. Gas is filled into the interior of the gas cylinder liner through the one-way valve, and the gas entering the gas cylinder liner cannot be discharged through the one-way valve. The internal pressure of the gas cylinder liner is changed by the filling of gas, and the tension of the carbon fiber prepreg wrapped on the outer wall of the gas cylinder liner is adjusted, so that the tension of the interlayer carbon fiber prepreg is uniform;

[0009] The gas guide shaft is provided with an inflation valve at one end close to the gas cylinder liner, and a rotary sealing valve is provided at one end away from the gas cylinder liner. The inflation valve is connected to the one-way valve. The cooperation of the inflation valve and the one-way valve prevents air leakage between the air inlet pipe and the gas guide shaft. The rotary sealing valve is connected to the rotary joint. The rotary sealing valve effectively prevents air leakage from occurring at the connection between the gas guide shaft and the rotary joint due to rotation and inflation operations. The rotary joint is connected to the gas supply equipment.

[0010] The first frame and the second frame are arranged at intervals, the gas outlet pipe is connected to the rotating shaft, the rotating shaft is rotatably connected to the first frame through a bearing, the gas guide shaft is rotatably connected to the second frame through a bearing, and a rotation driving device is arranged on the first frame or the second frame, and the rotation driving device drives the gas guide shaft to rotate;

[0011] During the production process of the hydrogen storage cylinder, the gas guide shaft is driven to rotate by a rotary drive device, which in turn drives the cylinder liner to rotate, so that the carbon fiber prepreg can be smoothly and evenly wound around the outer wall of the cylinder liner. The gas supply device supplies gas to the cylinder liner and adjusts the pressure in the inner cavity of the cylinder liner, so that the tension of the carbon fiber prepreg wrapped around the inner layer of the outer wall of the cylinder liner and the carbon fiber prepreg wrapped around the outer layer of the outer wall of the cylinder liner are consistent. During the preparation process of the entire hydrogen storage cylinder, the cooperation of the inflation valve and the one-way valve is used to prevent air leakage between the air inlet pipe and the gas guide shaft, and the rotary sealing valve is used to effectively prevent air leakage at the connection between the gas guide shaft and the rotary joint due to rotation and inflation operations.

[0012] Furthermore, the one-way valve comprises a valve body, a vent hole, an air sealing needle, a compression spring and an air inlet plug, wherein:

[0013] The valve body comprises a first valve section, a second valve section and a third valve section connected in sequence, the outer diameter of the first valve section matches the inner diameter of the air inlet pipe of the gas cylinder liner, the outer wall of the third valve section is a tapered truncated cone structure, the outer diameter of the second valve section is larger than the outer diameter of the first valve section, and larger than the maximum outer diameter of the third valve section, the first valve section is inserted into the inner cavity of the air inlet pipe of the gas cylinder liner, the third valve section is inserted into the inflation valve, and the second valve section blocks the end of the air inlet pipe of the gas cylinder liner and the beginning of the inflation valve to improve the sealing effect;

[0014] The valve body is provided with vent holes along the axial direction, and the vent holes include a first vent hole, a second vent hole and a third vent hole which are sequentially provided from the first valve section to the third valve section, and the diameter of the first vent hole is greater than the diameter of the second vent hole and greater than the diameter of the third vent hole; an air inlet plug is installed in the first vent hole, and the air inlet plug is provided with a perforation along the axial direction, and air guide holes are distributed around the perforation, and after the gas enters the one-way valve, it enters the second vent hole along the third vent hole and flows into the interior of the gas cylinder liner through the air guide holes on the air inlet plug in the first vent hole;

[0015] The air sealing needle comprises a first rod segment, a second rod segment, a third rod segment and a fourth rod segment connected in sequence, the second rod segment, the third rod segment and the fourth rod segment are located in the second vent hole, the first rod segment passes through the through hole of the air inlet plug, the diameter of the first rod segment is interference fit with the diameter of the through hole, the diameter of the first rod segment is less than the diameter of the second rod segment and less than the diameter of the third rod segment, the diameter of the fourth rod segment is less than the diameter of the third rod segment and matches the diameter of the third vent hole;

[0016] A compression spring is sleeved on the outside of the second rod segment, and the compression spring is limited between the air inlet plug and the third rod segment. When the compression spring is in a natural expansion and contraction state, it pushes the third rod segment to move toward the third air vent, so that the fourth rod segment blocks the third air vent; when external gas enters the one-way valve, the fourth rod segment is forced to separate from the third air vent, and the compression spring is compressed. At this time, the gas enters the second vent from the third vent and then flows into the inner liner of the gas cylinder through the air guide hole of the air inlet plug in the first vent. When the external air pressure decreases, the compression spring is reset under the action of its own elastic force, so that the fourth rod segment blocks the third vent again.

[0017] Furthermore, a first O-ring is provided on the fourth rod segment, and the outer edge of the first O-ring does not contact the inner wall of the vent hole. When the compression spring is in a naturally extended state, the first O-ring is squeezed on the interface between the second vent hole and the third vent hole. The setting of the first O-ring is beneficial to enhancing the sealing effect of the air sealing needle.

[0018] Furthermore, a first groove is formed on the outer wall of the fourth rod segment, and the inner edge of the first O-ring is accommodated in the first groove, so that the first O-ring is not likely to move left and right.

[0019] Furthermore, the fourth rod segment is an elastic rod segment, and the end of the fourth rod segment is a tapered truncated cone structure. When the compression spring pushes the fourth rod segment into the third air hole under the action of its own elastic force, the fourth rod segment produces elastic deformation, thereby enhancing the sealing effect of the third air hole.

[0020] Furthermore, the inflation valve comprises an inflation valve body, the inflation valve body comprises a first inflation valve section and a second inflation valve section, the diameter of the first inflation valve section is smaller than the diameter of the second inflation valve section, and the diameter of the second inflation valve section is larger than the outer diameter of the gas guide shaft;

[0021] The inflation valve is provided with a one-way valve mounting hole, a first inflation hole, a second inflation hole and a first gas guide shaft mounting hole in sequence from the first inflation valve section to the second inflation valve section. The shape and size of the one-way valve mounting hole match the outer wall of the third valve section of the one-way valve. The third valve section is arranged inside the one-way valve mounting hole. The second inflation hole and the third vent hole are coaxially arranged. The first inflation hole and the second inflation hole are eccentrically arranged, and the first inflation hole connects the third vent hole and the second inflation hole. The staggered arrangement of the first inflation hole and the third vent hole can effectively prevent the fourth rod section of the sealing needle from being blocked in the first inflation hole, so that the gas in the first inflation hole can more conveniently push the sealing needle in the third vent hole out of the third vent hole. The diameter of the first gas guide shaft mounting hole matches the outer diameter of the gas guide shaft. One end of the gas guide shaft is fixedly connected to the first gas guide shaft mounting hole. The inflation valve serves as a transition sealing device, which effectively connects the one-way valve and the gas guide shaft, and prevents the one-way valve from leaking and the gas guide shaft from leaking.

[0022] Furthermore, a second groove is provided on the inner wall of the one-way valve mounting hole, a second O-type rubber ring is placed in the second groove, and an inner edge of the second O-type rubber ring abuts against an outer wall of the third valve section, thereby enhancing the sealing performance of the connection between the one-way valve and the inflation valve; a third groove is provided on the end surface of the second inflation valve section close to the gas guide shaft, a third O-type rubber ring is placed in the third groove, and the third O-type rubber ring abuts against the end surface of the gas guide shaft close to the second inflation valve section, thereby enhancing the sealing performance of the connection between the gas guide shaft and the inflation valve.

[0023] Furthermore, the diameter of the gas guide hole of the gas guide shaft is larger than the diameter of the second inflation hole, so that the pressure of the gas increases after entering the secondary inflation valve, so as to smoothly push open the sealing needle and allow the gas to smoothly enter the one-way valve.

[0024] Furthermore, the axis of the first inflation hole is located above the axis of the second inflation hole, so that the gas in the inflation valve can enter the one-way valve more easily.

[0025] Furthermore, the rotary sealing valve includes a sliding key shaft connecting piece, a second gas guide shaft mounting hole is opened at one end of the sliding key shaft connecting piece close to the gas guide shaft, an end of the gas guide shaft close to the sliding key shaft connecting piece is installed in the second gas guide shaft mounting hole, and an annular rubber sealing gasket is arranged between the end of the gas guide shaft and the end of the gas guide shaft mounting hole. The arrangement of the rotary sealing valve makes the connection sealing between the rotary joint and the gas guide shaft better.

[0026] The main function of the electronic control system of the automatic rotary inflator for the preparation of hydrogen storage cylinders is to automatically control the constant pressure of the product's inner cavity inflation pressure according to the program setting. The system consists of a touch screen, Siemens PLC, CNC system, electric proportional valve, etc. The operator sets the yarn pressure on the touch screen or in the winding program, and the PLC digital-to-analog converter outputs a standard electrical signal instruction to precisely control the output air pressure of the electric proportional valve. This air pressure is delivered to the inner liner of the gas cylinder through the rotary joint, rotary sealing valve, gas guide shaft, inflation valve, and one-way valve. The air pressure is calculated and calibrated and converted into the tension set by the operator on the touch screen.

[0027] The beneficial effect of the present invention is that compared with the prior art, the automatic rotary inflation device for preparing hydrogen storage cylinders of the present invention has the following advantages: during the production process of the hydrogen storage cylinder, the gas guide shaft is driven to rotate by a rotary driving device, thereby driving the cylinder liner to rotate, so that the carbon fiber prepreg can be smoothly and evenly wound onto the outer wall of the cylinder liner, and the gas supply device supplies gas to the cylinder liner and adjusts the pressure in the inner cavity of the cylinder liner, so that the tension of the carbon fiber prepreg wound on the inner layer of the outer wall of the cylinder liner and the carbon fiber prepreg wound on the outer layer of the outer wall of the cylinder liner are consistent. During the entire preparation process of the hydrogen storage cylinder, the cooperation of the inflation valve and the one-way valve is used to prevent air leakage between the air inlet pipe and the gas guide shaft, and the rotary sealing valve is used to effectively prevent air leakage at the connection between the gas guide shaft and the rotary joint due to rotation and inflation operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the installation structure of the gas cylinder liner and the one-way valve of the present invention;

[0030] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of region A;

[0031] Figure 4 It is a structural schematic diagram of the one-way valve of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the inflation valve of the present invention;

[0033] Figure 6 It is a schematic diagram of the installation structure of the second frame, the gas guide shaft and the rotary joint of the present invention;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of zone B;

[0035] Figure 8 For the present invention Figure 6 Schematic diagram of the C zone structure;

[0036] Among them, 1 first frame, 2 second frame, 3 gas cylinder liner, 301 air inlet pipe, 302 air outlet pipe, 4 gas guide shaft, 401 gas diversion hole, 5 rotary joint, 6 one-way valve, 601 valve body, 6011 first valve section, 6012 second valve section, 6013 third valve section, 602 vent, 6021 first vent, 6022 second vent, 6023 third vent, 603 air sealing needle, 6031 first rod section, 6032 second rod section, 6033 third rod section, 6034 fourth rod section, 604 compression spring, 605 air inlet plug, 6051 perforation, 6052 air guide hole, 606 first O-type sealing ring, 607 first groove, 7 inflation valve, 701 inflation valve body, 7011 first inflation valve section, 7012 second inflation valve section, 702 one-way valve mounting hole, 703 first inflation hole, 704 second inflation hole, 705 first gas guide shaft mounting hole, 706 second groove, 707 second O-type rubber ring, 708 third groove, 709 third O-type rubber ring, 8 rotary sealing valve, 801 sliding key shaft connector, 802 second gas guide shaft mounting hole, 803 annular rubber sealing pad. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] like Figure 1-5 In the illustrated embodiment, an automatic rotating gas filling device for preparing a hydrogen storage gas cylinder comprises a first frame 1, a second frame 2, a gas cylinder liner 3, a gas guide shaft 4 and a rotating joint 5, wherein the gas cylinder liner 3, the gas guide shaft 4 and the rotating joint 5 are sequentially connected and supported by the first frame 1 and the second frame 2, wherein:

[0039] An air inlet pipe 301 is provided at one end of the gas cylinder liner 3, and an air outlet pipe 302 is provided at the other end. A one-way valve 6 is provided at the beginning of the air inlet pipe 301 of the gas cylinder liner 3, and a check valve is provided on the air outlet pipe 302. Gas is filled into the interior of the gas cylinder liner 3 through the one-way valve 6, and the gas entering the gas cylinder liner 3 cannot be discharged from the one-way valve 6. The internal pressure of the gas cylinder liner 3 is changed by the filling of gas, and then the tension of the carbon fiber prepreg wrapped on the outer wall of the gas cylinder liner 3 is adjusted, so that the tension of the interlayer carbon fiber prepreg is uniform;

[0040] The end of the gas guide shaft 4 close to the gas cylinder liner 3 is provided with an inflation valve 7, and the end away from the gas cylinder liner 3 is provided with a rotary sealing valve 8. The inflation valve 7 is connected to the one-way valve 6. The cooperation of the inflation valve 7 and the one-way valve 6 prevents air leakage between the air inlet pipe 301 and the gas guide shaft 4. The rotary sealing valve 8 is connected to the rotary joint 5. The rotary sealing valve 8 effectively prevents air leakage from occurring at the connection between the gas guide shaft 4 and the rotary joint 5 due to rotation and inflation operations. The rotary joint 5 is connected to the gas supply equipment.

[0041] The first frame 1 and the second frame 2 are arranged at intervals, the gas outlet pipe 302 is connected to the rotating shaft, the rotating shaft is rotatably connected to the first frame 1 through a bearing, the gas guide shaft 4 is rotatably connected to the second frame 2 through a bearing, and a rotating driving device is arranged on the first frame 1 or the second frame 2, the rotating driving device drives the gas guide shaft 4 to rotate, and the rotating driving device can adopt a conventional structural design;

[0042] During the production process of the hydrogen storage cylinder, the gas guide shaft 4 is driven to rotate by a rotary drive device, which in turn drives the cylinder liner 3 to rotate, so that the carbon fiber prepreg can be smoothly and evenly wound around the outer wall of the cylinder liner 3. The gas supply device supplies gas to the cylinder liner 3 and adjusts the pressure in the inner cavity of the cylinder liner 3, so that the tension of the carbon fiber prepreg wound on the inner layer of the outer wall of the cylinder liner 3 and the carbon fiber prepreg wound on the outer layer of the outer wall of the cylinder liner 3 are consistent. During the preparation process of the entire hydrogen storage cylinder, the cooperation of the inflation valve 7 and the one-way valve 6 prevents air leakage between the air inlet pipe 301 and the gas guide shaft 4, and the rotary sealing valve 8 effectively prevents air leakage at the connection between the gas guide shaft 4 and the rotary joint 5 due to rotation and inflation operations.

[0043] In this embodiment, the one-way valve 6 includes a valve body 601, a vent hole 602, a gas sealing needle 603, a compression spring 604 and an air inlet plug 605, wherein:

[0044] The valve body 601 includes a first valve section 6011, a second valve section 6012 and a third valve section 6013 connected in sequence. The outer diameter of the first valve section 6011 matches the inner diameter of the air inlet pipe 301 of the gas cylinder liner 3. The outer wall of the third valve section 6013 is a tapered truncated cone structure. The outer diameter of the second valve section 6012 is greater than the outer diameter of the first valve section 6011 and greater than the maximum outer diameter of the third valve section 6013. The first valve section 6011 is inserted into the inner cavity of the air inlet pipe 301 of the gas cylinder liner 3, and the third valve section 6012 is inserted into the inflation valve 7. The second valve section 6012 blocks the end of the air inlet pipe 301 of the gas cylinder liner 3 and the beginning of the inflation valve 7 to improve the sealing effect.

[0045] The valve body 601 is provided with a vent hole 602 along the axial direction, and the vent hole 602 includes a first vent hole 6021, a second vent hole 6022 and a third vent hole 6023 which are sequentially provided from the first valve section 6011 to the third valve section 6012, and the diameter of the first vent hole 6021 is greater than the diameter of the second vent hole 6022 and greater than the diameter of the third vent hole 6023; an air inlet plug 605 is installed in the first vent hole 6021, and the air inlet plug 605 is provided with a through hole 6051 along the axial direction, and air guide holes 6052 are distributed around the through hole 6021. After the gas enters the one-way valve 6, it enters the second vent hole along the third vent hole and flows into the interior of the gas cylinder liner 3 through the air guide holes 6052 on the air inlet plug 605 in the first vent hole 6021;

[0046] The air sealing needle 603 includes a first rod segment 6031, a second rod segment 6032, a third rod segment 6033 and a fourth rod segment 6034 which are connected in sequence. The second rod segment 6032, the third rod segment 6033 and the fourth rod segment 6034 are located in the second vent hole 6022. The first rod segment 6032 passes through the through hole 6021 of the air inlet plug 605. The diameter of the first rod segment 6031 is interference fit with the diameter of the through hole 6021. The diameter of the first rod segment 6031 is less than the diameter of the second rod segment 6032 and less than the diameter of the third rod segment 6033. The diameter of the fourth rod segment 6034 is less than the diameter of the third rod segment 6033 and matches the diameter of the third vent hole 6023.

[0047] The second rod segment 6032 is sleeved with a compression spring 604 on the outside, and the compression spring 604 is limited between the air intake plug 605 and the third rod segment 6033. When the compression spring 604 is in a natural expansion and contraction state, it pushes the third rod segment 6033 to move toward the third air vent 6023, so that the fourth rod segment 6034 blocks the third air vent 6023; when external gas enters the one-way valve 6, the fourth rod segment 6034 is forced to separate from the third air vent 6023, and the compression spring 604 is compressed. At this time, the gas enters the second air vent 6022 from the third air vent 6023 and then flows into the gas cylinder liner 3 through the air guide hole 6052 of the air intake plug 605 in the first air vent 6021. When the external air pressure decreases, the compression spring 604 is reset under the action of its own elastic force, so that the fourth rod segment 6034 blocks the third air vent 6023 again.

[0048] In this embodiment, a first O-ring 606 is provided on the fourth rod segment 6034. The outer edge of the first O-ring 606 does not contact the inner wall of the vent 602. When the compression spring 604 is in a natural expansion and contraction state, the first O-ring 606 is squeezed on the interface between the second vent 6022 and the third vent 6023. The setting of the first O-ring 606 is beneficial to enhancing the sealing effect of the air sealing needle 603.

[0049] In this embodiment, a first groove 607 is formed on the outer wall of the fourth rod segment 6034 , and the inner edge of the first O-ring 606 is accommodated in the first groove 607 , so that the first O-ring 606 is not likely to move left and right.

[0050] In this embodiment, the fourth rod segment 6034 is an elastic rod segment, and the end of the fourth rod segment 6034 is a tapered truncated cone structure. When the compression spring 604 pushes the fourth rod segment 6034 into the third air hole 6023 under the action of its own elastic force, the fourth rod segment 6034 produces elastic deformation, thereby enhancing the sealing effect on the third air hole 6023.

[0051] In this embodiment, the inflation valve 7 includes an inflation valve body 701, and the inflation valve body 701 includes a first inflation valve section 7011 and a second inflation valve section 7012, the diameter of the first inflation valve section 7011 is smaller than the diameter of the second inflation valve section 7012, and the diameter of the second inflation valve section 7012 is larger than the outer diameter of the gas guide shaft 4;

[0052] The inflation valve 7 is provided with a one-way valve mounting hole 702, a first inflation hole 703, a second inflation hole 704 and a first gas guide shaft mounting hole 705 in sequence from the first inflation valve section 7011 to the second inflation valve section 7012. The shape and size of the one-way valve mounting hole 702 match the outer wall of the third valve section 6013 of the one-way valve 6. The third valve section 6013 is arranged inside the one-way valve mounting hole 702. The second inflation hole 704 is coaxially arranged with the third ventilation hole 6023. The first inflation hole 703 is eccentrically arranged with the second inflation hole 704. The first inflation hole 703 connects the third ventilation hole 6023 with the second inflation hole 704. The first inflation hole 703 is connected with the third ventilation hole 6023 and the second inflation hole 704. The staggered arrangement of the inflation hole 703 and the third ventilation hole 6023 can effectively prevent the fourth rod segment 6034 of the sealing needle 603 from being blocked in the first inflation hole 703, so that the gas in the first inflation hole 703 can more conveniently push the sealing needle 603 in the third ventilation hole 6023 out of the third ventilation hole 6023. The diameter of the first gas guide shaft mounting hole 705 matches the outer diameter of the gas guide shaft 4, and one end of the gas guide shaft 4 is fixedly connected to the first gas guide shaft mounting hole 705. The inflation valve 7 serves as a transition sealing device, which effectively connects the one-way valve 6 and the gas guide shaft 4, and ensures that the one-way valve 6 and the gas guide shaft 4 are leak-proof.

[0053] In this embodiment, a second groove 706 is provided on the inner wall of the one-way valve mounting hole 702, and a second O-type rubber ring 707 is placed in the second groove 706. The inner edge of the second O-type rubber ring 707 abuts against the outer wall of the third valve section 6013, thereby enhancing the sealing performance of the connection between the one-way valve 6 and the inflation valve 7; a third groove 708 is provided on the end surface of the second inflation valve section 7012 close to the gas guide shaft 4, and a third O-type rubber ring 709 is placed in the third groove 708. The third O-type rubber ring 709 abuts against the end surface of the gas guide shaft 4 close to the second inflation valve section 7012, thereby enhancing the sealing performance of the connection between the gas guide shaft 4 and the inflation valve 7.

[0054] In this embodiment, the diameter of the gas guide hole 401 of the gas guide shaft 4 is larger than the diameter of the second inflation hole 704, so that the pressure of the gas increases after entering the inflation valve 7, so as to smoothly push open the sealing needle 603 and allow the gas to smoothly enter the one-way valve 6.

[0055] In this embodiment, the axis of the first inflation hole 703 is located above the axis of the second inflation hole 704 , so that the gas in the inflation valve 7 can enter the one-way valve 6 more easily.

[0056] In this embodiment, the rotary sealing valve 8 includes a sliding key shaft connector 801, and a second gas guide shaft mounting hole 802 is opened at one end of the sliding key shaft connector 801 close to the gas guide shaft 4. The end of the gas guide shaft 4 close to the sliding key shaft connector 801 is installed in the second gas guide shaft mounting hole 802, and an annular rubber sealing gasket 803 is arranged between the end of the gas guide shaft 4 and the end of the second gas guide shaft mounting hole 802. The setting of the rotary sealing valve 8 makes the connection sealing performance between the rotary joint 5 and the gas guide shaft 4 better.

[0057] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific implementations. Any appropriate changes or modifications made to them by ordinary technicians in the technical field that conform to the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. An automatic rotating gas filling device for preparing a hydrogen storage cylinder, characterized in that: The invention comprises a first frame, a second frame, a gas cylinder liner, a gas guide shaft and a rotary joint, wherein the gas cylinder liner, the gas guide shaft and the rotary joint are sequentially connected and supported by the first frame and the second frame, wherein: One end of the gas cylinder liner is provided with an air inlet pipe, and the other end is provided with an air outlet pipe. The beginning of the air inlet pipe of the gas cylinder liner is provided with a one-way valve, and the air outlet pipe is provided with a check valve; The gas guide shaft is provided with an inflation valve at one end close to the gas cylinder liner, and a rotary sealing valve at one end away from the gas cylinder liner, the inflation valve is connected to the one-way valve, the rotary sealing valve is connected to the rotary joint, and the rotary joint is connected to the gas supply equipment; The first frame and the second frame are arranged at intervals, the gas outlet pipe is connected to the rotating shaft, the rotating shaft is rotatably connected to the first frame, the gas guide shaft is rotatably connected to the second frame, and a rotation driving device is arranged on the first frame or the second frame, and the rotation driving device drives the gas guide shaft to rotate; The one-way valve comprises a valve body, a vent hole, an air sealing needle, a compression spring and an air inlet plug, wherein: The valve body comprises a first valve section, a second valve section and a third valve section which are connected in sequence, the outer diameter of the first valve section matches the inner diameter of the air inlet pipe of the gas cylinder liner, the outer wall of the third valve section is a tapered truncated cone structure, the outer diameter of the second valve section is greater than the outer diameter of the first valve section, and greater than the maximum outer diameter of the third valve section; The valve body is provided with vent holes along the axial direction, and the vent holes include a first vent hole, a second vent hole and a third vent hole which are sequentially provided from the first valve section to the third valve section, and the diameter of the first vent hole is greater than the diameter of the second vent hole and greater than the diameter of the third vent hole; an air inlet plug is installed in the first vent hole, and the air inlet plug is provided with a through hole along the axial direction, and air guide holes are distributed around the through hole; The air sealing needle comprises a first rod segment, a second rod segment, a third rod segment and a fourth rod segment connected in sequence, the second rod segment, the third rod segment and the fourth rod segment are located in the second vent hole, the first rod segment passes through the through hole of the air inlet plug, the diameter of the first rod segment matches the diameter of the through hole, the diameter of the first rod segment is less than the diameter of the second rod segment and less than the diameter of the third rod segment, the diameter of the fourth rod segment is smaller than the diameter of the third rod segment and matches the diameter of the third vent hole; The second rod segment is sleeved with a compression spring on its exterior, the compression spring is limited between the air inlet plug and the third rod segment, and when the compression spring is in a naturally expanded and contracted state, the fourth rod segment blocks the third vent hole; The inflation valve comprises an inflation valve body, the inflation valve body comprises a first inflation valve section and a second inflation valve section, the diameter of the first inflation valve section is smaller than the diameter of the second inflation valve section, and the diameter of the second inflation valve section is larger than the outer diameter of the gas guide shaft; The inflation valve is provided with a one-way valve mounting hole, a first inflation hole, a second inflation hole and a first gas guide shaft mounting hole in sequence from the first inflation valve section to the second inflation valve section. The shape and size of the one-way valve mounting hole match the outer wall of the third valve section of the one-way valve. The third valve section is arranged inside the one-way valve mounting hole. The second inflation hole and the third ventilation hole are arranged coaxially. The first inflation hole and the second inflation hole are arranged eccentrically. The first inflation hole connects the third ventilation hole and the second inflation hole. The diameter of the first gas guide shaft mounting hole matches the outer diameter of the gas guide shaft. One end of the gas guide shaft is fixedly connected to the first gas guide shaft mounting hole. The diameter of the gas guide hole of the gas guide shaft is larger than the diameter of the second gas filling hole; The rotary sealing valve includes a sliding key shaft connector, a second gas guide shaft mounting hole is opened at one end of the sliding key shaft connector close to the gas guide shaft, an end of the gas guide shaft close to the sliding key shaft connector is mounted in the second gas guide shaft mounting hole, and an annular rubber sealing gasket is arranged between the end of the gas guide shaft and the end of the gas guide shaft mounting hole.

2. The automatic rotating gas filling device for preparing a hydrogen storage cylinder according to claim 1, characterized in that: The fourth rod segment is provided with a first O-ring, the outer edge of which does not contact the inner wall of the vent hole, and the first O-ring is squeezed on the interface between the second vent hole and the third vent hole when the compression spring is in a naturally expanded and contracted state.

3. The automatic rotating gas filling device for preparing a hydrogen storage cylinder according to claim 2, characterized in that: A first groove is formed on the outer wall of the fourth rod segment, and the inner edge of the first O-type sealing ring is accommodated in the first groove.

4. An automatic rotating gas filling device for preparing a hydrogen storage cylinder according to any one of claims 1 to 3, characterized in that: The fourth rod segment is an elastic rod segment, and the end of the fourth rod segment is a tapered truncated cone structure.

5. The automatic rotating gas filling device for preparing a hydrogen storage cylinder according to claim 1, characterized in that: A second groove is provided on the inner wall of the one-way valve mounting hole, a second O-type rubber ring is placed in the second groove, and the inner edge of the second O-type rubber ring abuts against the outer wall of the third valve section; a third groove is provided on the end surface of the second inflation valve section close to the gas guide shaft, a third O-type rubber ring is placed in the third groove, and the third O-type rubber ring abuts against the end surface of the gas guide shaft close to the second inflation valve section.

6. The automatic rotating gas filling device for preparing a hydrogen storage cylinder according to claim 1, characterized in that: The axis of the first inflation hole is located above the axis of the second inflation hole.

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