A high-pressure hydrogen valve with high sealing performance

Abstract

This invention discloses a high-sealing high-pressure hydrogen valve, belonging to the technical field of high-pressure hydrogen valves. The valve includes a connecting valve body, an auxiliary guide plate that flips upwards to reduce pressure at the sealing head, thus reducing the impact of gas flow pressure on the sealing head. An internal regulating cylinder distributes pressure at the connecting groove, preventing vibration caused by sudden pressure changes. A buffer plate absorbs the pressure from hydrogen impact as elastic potential energy. Simultaneously, the pressure is converted into frictional force to generate heat during the pushing of the damping push plate, reducing the impact of pressure on the internal pipes. An indicator push rod allows the magnetic repulsion force to horizontally push a magnetic plate and the indicator push rod forward, enabling observation of whether the internal pressure exceeds the safe range by measuring the distance the indicator push rod moves, facilitating maintenance.

Description

Technical Field

[0001] This invention relates to the field of high-pressure hydrogen valve technology, and more specifically, to a high-pressure hydrogen valve with high sealing performance. Background Technology

[0002] In high-pressure hydrogen transportation and application systems, valves play a crucial role in controlling the flow and cut-off of hydrogen. Currently, common high-pressure hydrogen valves generally have some problems that are difficult to ignore during the closing process.

[0003] Existing high-pressure hydrogen valves experience significant pressure changes at the valve location upon closure due to limitations in their design. These pressure changes are not smooth transitions but rather exhibit substantial fluctuations. As the valve begins to close and the flow path narrows, the hydrogen velocity increases dramatically. According to fluid mechanics principles, this increased velocity leads to a decrease in local pressure, creating a complex pressure field. When the valve is fully closed, the fluid flow stops instantaneously, and kinetic energy is rapidly converted into pressure energy, causing a sudden increase in pressure at the valve location. This drastic pressure change is further transmitted to the connected piping system, and the large pressure fluctuations severely test the sealing performance of the piping system. Pipeline seals, constantly exposed to this alternating pressure environment, are prone to aging and deformation, leading to hydrogen leakage. Hydrogen is a flammable and explosive gas; any leakage would seriously threaten personnel safety and the stable operation of production facilities. Furthermore, frequent pressure changes can cause pipeline vibrations. Due to the unevenness of pressure changes, pipelines experience varying degrees of stress concentration. When the stress exceeds the fatigue limit of the pipeline material, fatigue cracks appear. Over time, these cracks propagate and may eventually lead to pipeline rupture, causing catastrophic consequences. Furthermore, this vibration generates significant noise, causing noise pollution to the working environment. The pressure shock when a valve closes also causes severe wear on the valve itself. Sudden pressure changes subject internal valve components such as sealing surfaces and the valve core to enormous impact forces, accelerating the wear of these parts.

[0004] The purpose of this invention is to provide a high-pressure hydrogen valve with high sealing performance to solve the problems mentioned in the background art.

[0005] A high-pressure hydrogen valve with high sealing performance includes a connecting valve body. One end of the connecting valve body is provided with a gas supply pipe, and the other end of the connecting valve body is provided with a gas outlet pipe. A top seal is fixedly installed at the upper end of the connecting valve body. An outer adjusting cylinder is threaded in the middle of the top seal. A cylindrical seal is fixedly installed at the lower end of the outer adjusting cylinder. An isolation plate is fixedly installed at the upper end of the top seal. An inner adjusting cylinder is threaded in the middle of the outer adjusting cylinder. A sealing head is fixedly installed at the lower end of the cylindrical seal. A sealing groove is fixedly installed at the lower end of the sealing head. A sealing plate is fixedly installed in the middle of the connecting valve body. A connecting groove is opened in the middle of the sealing plate. A buffer plate is fixedly installed on the upper side of the inner cavity of the sealing plate. A plurality of guide holes are equidistantly opened at the lower end of the buffer plate. A rubber diaphragm is fixedly installed at the upper end of the buffer plate. A protective membrane is fixedly installed in the inner cavity of the buffer plate. A plurality of shock-absorbing springs are fixedly installed in a ring on the inner side of the protective membrane.

[0006] An installation plate is fixedly installed at the lower end of the inner regulating cylinder, and a limit rod is fixedly installed at the lower end of the installation plate. A fixed seat is fixedly installed on the bottom side of the inner cavity of the connecting valve body. An auxiliary guide plate is rotatably installed at the upper end of the fixed seat. A fixed groove is opened at the upper end of the auxiliary guide plate. When the sealing head is completely closed, the air supply pipe and the air outlet pipe are completely disconnected. The operator can control the inner regulating cylinder to rotate downward so that the limit rod at the bottom of the inner regulating cylinder is inserted into the fixed groove opened on the upper side of the auxiliary guide plate.

[0007] A buffer tube is fixedly installed on the upper front side of the connecting valve body. A damping groove is fixedly installed in the middle of the inner cavity of the buffer tube. A damping push plate is slidably arranged on the inner side of the damping groove. A magnetic core is fixedly installed on the side of the damping push plate. A buffer spring is fixedly installed on the outer side of the magnetic core. A connecting cover plate is fixedly installed at the front end of the buffer tube. A warning shell is fixedly installed in the middle of the front side of the connecting cover plate. An indicator groove is opened in the middle of the warning shell. An indicator push rod is arranged on the inner side of the indicator groove. A magnetic sheet is fixedly installed at the rear end of the indicator push rod. A scale plate is fixedly installed on the side of the warning shell.

[0008] Furthermore, the gas supply pipe and connecting valve body, the gas outlet pipe and connecting valve body, and the top seal and connecting valve body are all fixedly connected by fixing bolts, and a reinforcing base is fixedly installed at the lower end of the connecting valve body.

[0009] By adopting the above technical solutions, the gas supply pipe and connecting valve body, the gas outlet pipe and connecting valve body, and the top seal and connecting valve body can be easily installed and fixed, and are easy to disassemble and process.

[0010] Furthermore, a reinforcing plate is threaded on the outer side of the middle part of the outer adjusting cylinder, and connecting posts are threaded on the front and rear sides of the reinforcing plate. A pair of sealing clamps are provided on both sides of the outer adjusting cylinder below the reinforcing plate, and the sealing clamps are fixedly connected by sealing bolts.

[0011] By adopting the above technical solution and using a structure with a sealing clamp, the cylindrical seal can be sealed and limited, thereby increasing the sealing performance of the overall valve body and improving its stability.

[0012] Furthermore, valve mounting components are fixedly installed at the upper ends of both the outer and inner regulating cylinders, and the valve mounting components are square components.

[0013] By adopting the above technical solution, operators can fix and install the corresponding handwheel at the valve mounting position, which allows for convenient torsion adjustment of the outer and inner regulating cylinders respectively, thereby controlling the overall internal switching.

[0014] Furthermore, the lower end of the sealing head is a cylindrical component, and the sealing plate is provided with a circular groove at the upper end of the connecting groove that corresponds to the lower end of the sealing head.

[0015] By adopting the above technical solution, when the sealing head descends into the connecting groove, the lower end of the sealing head can be precisely embedded in the circular groove opened in the connecting groove, so that the sealing head can seal the sealing plate.

[0016] Furthermore, the buffer plate is composed of multiple semi-circular ring components, and the rubber membrane and protective membrane are made of flexible rubber material.

[0017] By adopting the above technical solution, when the buffer plate is subjected to liquid impact pressure, the pressure on the buffer plate will cause the rubber diaphragm to deform and compress, and the shock-absorbing spring will be compressed synchronously. The shock-absorbing spring can absorb the impact force of the internal liquid and reduce the pressure change inside the connecting valve body, thereby effectively preventing the connecting valve body from vibrating.

[0018] Furthermore, a connecting spring is fixedly installed on the side of the auxiliary guide plate, and a spring fixing component is fixedly installed on the bottom of the inner cavity of the connecting valve body on one side of the fixing seat. The side of the auxiliary guide plate near the air delivery pipe is a concave component, the auxiliary guide plate is an arc-shaped component, and the bottom of the inner cavity of the connecting valve body is an elliptical structure.

[0019] By adopting the above technical solution, the lower end of the connecting spring is fixedly connected to the spring fixing member. When the auxiliary guide plate flips, the connecting spring can rotate at the position of the spring fixing member, so that it can always exert a certain pulling force on the auxiliary guide plate. When the end of the auxiliary guide plate with the concave structure contacts the lower side of the sealing plate, there is only a tiny gap for hydrogen to flow through, thereby effectively reducing the pressure at the connecting groove position. When the auxiliary guide plate flips under the pressure of the airflow, the elliptical structure of the bottom wall of the inner cavity of the connecting valve body will increase the pressure difference of the airflow, thereby providing an upward lifting force to one side of the auxiliary guide plate, causing the auxiliary guide plate to flip.

[0020] Furthermore, the buffer plate is a memory metal component, and the upper end of the inner ring recess of the buffer plate is fixedly connected to the connecting valve body. The inner cavity top wall of the connecting valve body is provided with a circular groove corresponding to the lower outer edge of the buffer plate.

[0021] By adopting the above technical solution, when the buffer plate is subjected to pressure impact, the lower edge of the buffer plate will be deformed by pressure, and the side edge of the buffer plate will deform and slide upward along the circular groove set in the inner cavity top wall of the connecting valve body. In this way, the pressure inside the connecting valve body can be converted into the elastic potential energy of the shock-absorbing spring to a certain extent for absorption and storage.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] 1. In this invention, by providing an auxiliary guide plate, when the sealing head is close to the connecting groove, as the gap of the connecting groove becomes smaller, the internal hydrogen flow rate increases, and the auxiliary guide plate flips upward, thereby reducing the pressure at the sealing head position and reducing the impact of the gas flow pressure on the sealing head position.

[0024] 2. In this invention, by providing an inner regulating cylinder, when the cylindrical seal is closed, the inner regulating cylinder can be adjusted to move downward, so that the limiting rod presses against the auxiliary guide plate downward. When the valve is reopened, one end of the auxiliary guide plate can reduce the amount of hydrogen passing through, distribute the pressure at the position of the connecting groove, and avoid vibration caused by sudden changes in internal pressure.

[0025] 3. In this invention, by setting a structure with a buffer plate, the pressure of hydrogen impact is converted into elastic potential energy and absorbed during the switching process. At the same time, during the process of pushing the damping push plate, the pressure is converted into frictional force to generate heat, thereby reducing the impact of pressure on the internal pipe.

[0026] 4. In this invention, by setting an indicator push rod, when the magnetic core is pushed, the magnetic repulsion force will horizontally push the magnetic sheet and the indicator push rod forward. The distance the indicator push rod moves can be used to observe whether the internal pressure exceeds the safe range, which is convenient for maintenance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the image;

[0030] Figure 4 For the present invention Figure 2 Enlarged view of the structure at point B in the image;

[0031] Figure 5 For the present invention Figure 2 Enlarged view of the structure at point C in the image;

[0032] Figure 6 This is a longitudinal sectional view of the overall structure of the present invention;

[0033] Figure 7 This is a cross-sectional view of the buffer tube of the present invention;

[0034] Figure 8 This is a schematic diagram of the internal hydrogen flow when the present invention is turned on;

[0035] Figure 9 This is a schematic diagram of the internal hydrogen flow during the shutdown process of the present invention;

[0036] Figure 10 This is a schematic diagram of the internal structure of the present invention when it is closed.

[0037] Explanation of the labels in the diagram: 1. Gas supply pipe; 2. Fixing bolt; 3. Connecting valve body; 4. Reinforcing base; 5. Buffer pipe; 6. Connecting cover plate; 601. Indicator groove; 7. Scale plate; 8. Warning shell; 9. Top seal; 10. Isolation plate; 11. Valve mounting component; 12. Inner regulating cylinder; 1201. Mounting plate; 1202. Limiting rod; 13. Outer regulating cylinder; 14. Sealing clamp; 1401. Sealing bolt; 15. Gas outlet pipe; 16. Sealing plate; 1601. Connecting... 17. Groove; 18. Cylindrical seal; 19. Fixing base; 20. Auxiliary guide plate; 21. Fixing groove; 22. Connecting spring; 2101. Spring fixing piece; 23. Shock-absorbing spring; 24. Buffer plate; 25. Rubber diaphragm; 26. Guide hole; 27. Protective membrane; 28. Sealing head; 29. ​​Sealing groove; 20. Reinforcing plate; 20. Connecting column; 21. Damping groove; 22. Damping push plate; 33. Magnetic core; 34. Buffer spring; 35. Magnetic sheet; 36. Indicator push rod. Detailed Implementation

[0038] 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.

[0039] like Figure 1 - Figure 10 As shown, this embodiment of the invention provides: a connecting valve body 3, with an air supply pipe 1 at one end of the connecting valve body 3 and an air outlet pipe 15 at the other end of the connecting valve body 3; a top seal 9 is fixedly installed on the upper end of the connecting valve body 3; an outer adjusting cylinder 13 is threadedly installed in the middle of the top seal 9; a cylindrical seal 17 is fixedly installed on the lower end of the outer adjusting cylinder 13; an isolation plate 10 is fixedly installed on the upper end of the top seal 9; an inner adjusting cylinder 12 is threadedly installed in the middle of the outer adjusting cylinder 13; and an inner adjusting cylinder 12 is fixedly installed on the lower end of the cylindrical seal 17. A sealing head 25 is provided, and a sealing groove 2501 is fixedly installed at the lower end of the sealing head 25. A sealing plate 16 is fixedly installed in the middle of the connecting valve body 3. A connecting groove 1601 is opened in the middle of the sealing plate 16. A buffer plate 23 is fixedly installed on the upper side of the inner cavity of the sealing plate 16. Several guide holes 2302 are opened at equal intervals at the lower end of the buffer plate 23. A rubber membrane 2301 is fixedly installed on the upper end of the buffer plate 23. A protective membrane 24 is fixedly installed in the inner cavity of the buffer plate 23. Several shock-absorbing springs 22 are fixedly installed in a ring on the inner side of the protective membrane 24.

[0040] An installation plate 1201 is fixedly installed at the lower end of the inner regulating cylinder 12, and a limit rod 1202 is fixedly installed at the lower end of the installation plate 1201. A fixed seat 18 is fixedly installed on the bottom side of the inner cavity of the connecting valve body 3. An auxiliary guide plate 19 is rotatably set at the upper end of the fixed seat 18. A fixed groove 20 is opened at the upper end of the auxiliary guide plate 19. When the sealing head 25 is completely closed, the air supply pipe 1 and the air outlet pipe 15 are completely disconnected. The operator can control the inner regulating cylinder 12 to rotate downward so that the limit rod 1202 at the bottom of the inner regulating cylinder 12 is inserted into the fixed groove 20 opened on the upper side of the auxiliary guide plate 19.

[0041] A buffer tube 5 is fixedly installed on the upper front side of the connecting valve body 3. A damping groove 27 is fixedly installed in the middle of the inner cavity of the buffer tube 5. A damping push plate 28 is slidably arranged on the inner side of the damping groove 27. A magnetic core 29 is fixedly installed on the side of the damping push plate 28. A buffer spring 30 is fixedly installed on the outer side of the magnetic core 29. A connecting cover plate 6 is fixedly installed at the front end of the buffer tube 5. A warning housing 8 is fixedly installed in the middle of the front side of the connecting cover plate 6. An indicator groove 601 is opened in the middle of the warning housing 8. An indicator push rod 32 is arranged on the inner side of the indicator groove 601. A magnetic sheet 31 is fixedly installed at the rear end of the indicator push rod 32. A scale plate 7 is fixedly installed on the side of the warning housing 8.

[0042] The gas supply pipe 1 and the connecting valve body 3, the gas outlet pipe 15 and the connecting valve body 3, and the top seal 9 and the connecting valve body 3 are all fixedly connected by fixing bolts 2. The lower end of the connecting valve body 3 is fixedly installed with a reinforcing base 4. The gas supply pipe 1 and the connecting valve body 3, the gas outlet pipe 15 and the connecting valve body 3, and the top seal 9 and the connecting valve body 3 can be easily installed and fixed, and are easy to disassemble and process.

[0043] A reinforcing plate 26 is threaded on the outer side of the middle part of the outer adjusting cylinder 13. Connecting columns 2601 are threaded on the front and rear sides of the reinforcing plate 26. A pair of sealing clamps 14 are provided on both sides of the outer adjusting cylinder 13 below the reinforcing plate 26. The sealing clamps 14 are fixedly connected by sealing bolts 1401. By providing the structure of sealing clamps 14, the columnar seal 17 can be sealed and limited, thereby increasing the sealing performance of the overall connecting valve body 3 and improving stability.

[0044] Valve mounting parts 11 are fixedly installed at the upper end of the outer regulating cylinder 13 and the upper end of the inner regulating cylinder 12. The valve mounting parts 11 are square components. Operators can fix and install corresponding handwheels at the positions of the valve mounting parts 11, which can conveniently make torsional adjustments to the outer regulating cylinder 13 and the inner regulating cylinder 12 respectively, thereby controlling the overall internal switch.

[0045] The lower end of the sealing head 25 is a cylindrical component. The sealing plate 16 is located at the upper end of the connecting groove 1601 and has a circular groove corresponding to the lower end of the sealing head 25. When the sealing head 25 descends into the connecting groove 1601, the lower end of the sealing head 25 can be precisely embedded in the circular groove of the connecting groove 1601, so that the sealing head 25 can seal the sealing plate 16.

[0046] The buffer plate 23 consists of multiple semi-circular ring components. The rubber diaphragm 2301 and the protective diaphragm 24 are made of flexible rubber. When the buffer plate 23 is subjected to liquid impact pressure, the pressure on the buffer plate 23 will cause the rubber diaphragm 2301 to deform and compress. The shock-absorbing spring 22 will be compressed synchronously. The shock-absorbing spring 22 can absorb the impact force of the internal liquid and reduce the change of internal pressure of the connecting valve body 3, thereby effectively preventing the connecting valve body 3 from vibrating.

[0047] A connecting spring 21 is fixedly installed on the side of the auxiliary guide plate 19. A spring fixing member 2101 is fixedly installed on the bottom of the inner cavity of the connecting valve body 3 on one side of the fixing seat 18. The side of the auxiliary guide plate 19 near the gas supply pipe 1 is a concave component. The auxiliary guide plate 19 is an arc-shaped component. The bottom of the inner cavity of the connecting valve body 3 is an elliptical structure. The lower end of the connecting spring 21 is fixedly connected to the spring fixing member 2101. When the auxiliary guide plate 19 flips, the connecting spring 21 can rotate at the position of the spring fixing member 2101, so that it can always exert a certain pulling force on the auxiliary guide plate 19. When the end of the auxiliary guide plate 19 with the concave structure contacts the lower side of the sealing plate 16, there is only a small gap for hydrogen to flow, thereby effectively reducing the pressure at the position of the connecting groove 1601. When the auxiliary guide plate 19 is flipped by the airflow pressure, the elliptical structure of the bottom wall of the inner cavity of the connecting valve body 3 will increase the pressure difference of the airflow, thereby providing an upward lifting force to one side of the auxiliary guide plate 19, causing the auxiliary guide plate 19 to flip.

[0048] The buffer plate 23 is a memory metal component. The upper end of the inner ring recess of the buffer plate 23 is fixedly connected to the connecting valve body 3. The inner cavity top wall of the connecting valve body 3 is provided with a circular groove corresponding to the lower outer edge of the buffer plate 23. When the buffer plate 23 is subjected to pressure impact, the lower edge of the buffer plate 23 will be deformed by pressure. The side edge of the buffer plate 23 will deform and slide upward along the circular groove provided in the inner cavity top wall of the connecting valve body 3. Thus, the pressure inside the connecting valve body 3 can be converted into the elastic potential energy of the shock-absorbing spring 22 for absorption and storage to a certain extent.

[0049] Working principle of the invention: Example 1, according to Figure 8 As shown, when the inside of the connecting valve body 3 is in the open state, the high-pressure hydrogen gas inside its gas delivery pipe 1 moves from below through the connecting groove 1601 in the middle of the sealing plate 16 to the inside of the gas outlet pipe 15. Meanwhile, an auxiliary guide plate 19 is rotatably provided on the upper side of the fixed seat 18. The auxiliary guide plate 19 is in a horizontal equilibrium state under the tension of the connecting spring 21.

[0050] according to Figure 1 , 2 As shown in Figure 5, the installer can fix the handwheel at the valve mounting part 11 position of the outer adjusting cylinder 13 and the inner adjusting cylinder 12. When the handwheel of the outer adjusting cylinder 13 is rotated, the lower cylindrical seal 17 will be driven down. The lower side of the cylindrical seal 17 is fixedly installed with a sealing head 25. Since the downward adjustment of the cylindrical seal 17 is adjusted by rotating the handwheel downward, the downward range of the cylindrical seal 17 is the same as the thread width, which is relatively constant.

[0051] according to Figure 9As shown, the cylindrical seal 17 moves downward with the sealing head 25. When the sealing head 25 approaches the connecting groove 1601, according to basic aerodynamics, since the pressure of hydrogen remains constant on both sides of the gas supply pipe 1 and the gas outlet pipe 15, the hydrogen flow rate increases when the high-pressure hydrogen passes through the connecting groove 1601. Inside the auxiliary guide plate 19, below the sealing plate 16, the air pressure near the sealing plate 16 increases, while the space at the bottom of the auxiliary guide plate 19 remains under low pressure. As the cylindrical seal 17 moves downward, the guide plate 19 is driven by the hydrogen gas flow. The end near the gas supply pipe 1 will rotate towards the sealing plate 16. Its dynamic change can block the passing hydrogen to a certain extent. At this time, the hydrogen flow channel area gradually decreases. Even if the downward amplitude of the cylindrical seal 17 is constant, the hydrogen flow channel area will change dynamically, avoiding sudden pressure changes. This dynamically reduces the hydrogen flow rate at the position of the connecting groove 1601, shares the pressure at the sealing head 25, and effectively extends the service life of the sealing head 25.

[0052] according to Figure 10 As shown, when the sealing head 25 is completely closed, the gas supply pipe 1 and the gas outlet pipe 15 are completely disconnected. The operator can control the inner regulating cylinder 12 to rotate downwards, so that the limiting rod 1202 at the bottom of the inner regulating cylinder 12 is inserted into the fixing groove 20 opened on the upper side of the auxiliary guide plate 19. At this time, the end of the auxiliary guide plate 19 near the gas supply pipe 1 is in contact with the sealing plate 16. Since the side of the auxiliary guide plate 19 near the gas supply pipe 1 is a concave component, when the end of the auxiliary guide plate 19 with the concave structure is in contact with the lower side of the sealing plate 16, there is only a small gap for hydrogen to flow. At this time, when it is necessary to open the connecting valve body 3, the outer regulating cylinder 13 is rotated. Normally, the connection groove 1601 is suddenly connected, which will produce a large pressure difference change. The small gap between the auxiliary guide plate 19 and the sealing plate 16 can effectively reduce the initial hydrogen flow channel area, thereby effectively reducing the pressure difference change and effectively avoiding device vibration caused by pressure fluctuations.

[0053] In the second embodiment, during the opening and closing of the sealing head 25, the hydrogen gas inevitably increases its flow velocity at the position between the sealing head 25 and the connecting groove 1601 as it passes through the connecting groove 1601. At this time, the pressure on the connecting valve body 3 located on the upper side of the sealing plate 16 will increase. By designing a structure with a buffer plate 23, when the hydrogen gas passes through the sealing head 25 and the connecting groove 1601, it will push the buffer plate 23 to move. Several damping springs 22 are equidistantly arranged around the periphery of the buffer plate 23. When the buffer plate 23 is deformed by the impact of hydrogen gas, it will push the buffer plate 23 to move, eventually causing the damping springs 22 to undergo elastic deformation. The damping springs 22 can play a certain role in damping the impact of pressure, thereby effectively avoiding the vibration of the connecting valve body 3 caused by the impact of internal gas, and preventing the loosening of the connection position between the gas supply pipe 1, the connecting valve body 3 and the gas outlet pipe 15.

[0054] When the pressure on the upper side of the valve body 3 changes during the opening and closing of the sealing head 25, the increased pressure pushes the damping push plate 28 to move inside the damping groove 27. When the buffer spring 30 undergoes elastic deformation, it absorbs a certain amount of pressure energy. The buffer spring 30 dissipates energy through the damping structure of the damping push plate 28 and the damping groove 27, and converts pressure into heat energy through friction. This can effectively reduce the pressure peak inside the pipeline system during the opening and closing of the cylindrical seal 17, thereby reducing the impact on the pipeline system. Furthermore, when the buffer spring 30 is subjected to forward pressure... When pushed by force, the magnetic core 29 will move forward together. The front end of the magnetic core 29 and the rear end of the magnetic sheet 31 have the same magnetic poles, and the buffer tube 5 is a non-magnetic structure. When the magnetic core 29 moves forward, the Lorentz force can push the magnetic sheet 31 forward. The side of the warning housing 8 is provided with a transparent scale plate 7. The operator can intuitively observe the maximum pressure inside the pipeline by indicating the distance the push rod 32 extends forward. This allows the operator to determine whether there is an abnormal pressure exceeding the safe range during pipeline switching, which is convenient for inspection and maintenance.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-pressure hydrogen valve with high sealing performance, comprising a connecting valve body (3), characterized in that: One end of the connecting valve body (3) is provided with an air supply pipe (1), and the other end of the connecting valve body (3) is provided with an air outlet pipe (15). A top seal (9) is fixedly installed on the upper end of the connecting valve body (3). An outer adjusting cylinder (13) is threaded in the middle of the top seal (9). A cylindrical seal (17) is fixedly installed on the lower end of the outer adjusting cylinder (13). An isolation plate (10) is fixedly installed on the upper end of the top seal (9). An inner adjusting cylinder (12) is threaded in the middle of the outer adjusting cylinder (13). A sealing head (25) is fixedly installed on the lower end of the cylindrical seal (17). A sealing groove (2501) is fixedly installed at the lower end of the head (25). A sealing plate (16) is fixedly installed in the middle of the connecting valve body (3). A connecting groove (1601) is opened in the middle of the sealing plate (16). A buffer plate (23) is fixedly installed on the upper side of the inner cavity of the sealing plate (16). Several guide holes (2302) are opened at equal intervals at the lower end of the buffer plate (23). A rubber membrane (2301) is fixedly installed at the upper end of the buffer plate (23). A protective membrane (24) is fixedly installed in the inner cavity of the buffer plate (23). Several shock-absorbing springs (22) are fixedly installed in a ring on the inner side of the protective membrane (24). An installation plate (1201) is fixedly installed at the lower end of the inner regulating cylinder (12), and a limit rod (1202) is fixedly installed at the lower end of the installation plate (1201). A fixed seat (18) is fixedly installed on the bottom side of the inner cavity of the connecting valve body (3). An auxiliary guide plate (19) is rotatably installed on the upper end of the fixed seat (18). A fixed groove (20) is opened on the upper end of the auxiliary guide plate (19). When the sealing head (25) is completely closed, the air supply pipe (1) and the air outlet pipe (15) are completely disconnected. The operator can control the inner regulating cylinder (12) to rotate downward so that the limit rod (1202) at the bottom of the inner regulating cylinder (12) is inserted into the fixed groove (20) opened on the upper side of the auxiliary guide plate (19). A buffer tube (5) is fixedly installed on the upper front side of the connecting valve body (3). A damping groove (27) is fixedly installed in the middle of the inner cavity of the buffer tube (5). A damping push plate (28) is slidably arranged on the inner side of the damping groove (27). A magnetic core (29) is fixedly installed on the side of the damping push plate (28). A buffer spring (30) is fixedly installed on the outer side of the magnetic core (29). A connecting cover plate (6) is fixedly installed at the front end of the buffer tube (5). A warning shell (8) is fixedly installed in the middle of the front side of the connecting cover plate (6). An indicator groove (601) is opened in the middle of the warning shell (8). An indicator push rod (32) is arranged on the inner side of the indicator groove (601). A magnetic sheet (31) is fixedly installed at the rear end of the indicator push rod (32). A scale plate (7) is fixedly installed on the side of the warning shell (8).

2. The high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: The gas supply pipe (1) and connecting valve body (3), the gas outlet pipe (15) and connecting valve body (3), the top seal (9) and connecting valve body (3) are all fixedly connected by fixing bolts (2), and a reinforcing base (4) is fixedly installed at the lower end of the connecting valve body (3).

3. The high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: The outer adjusting cylinder (13) is provided with a reinforcing plate (26) threaded on the outer side of the middle part. The reinforcing plate (26) is provided with connecting columns (2601) threaded on the front and rear sides. The outer adjusting cylinder (13) is provided with a pair of sealing clamps (14) on both sides below the reinforcing plate (26). The sealing clamps (14) are fixedly connected by sealing bolts (1401).

4. The high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: Valve mounting parts (11) are fixedly installed on the upper end of the outer regulating cylinder (13) and the upper end of the inner regulating cylinder (12). The valve mounting parts (11) are square components.

5. A high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: The lower end of the sealing head (25) is a cylindrical component, and the sealing plate (16) is located at the upper end of the connecting groove (1601) and has a circular groove corresponding to the lower end of the sealing head (25).

6. A high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: The buffer plate (23) consists of multiple semi-circular ring components, and the rubber membrane (2301) and protective membrane (24) are flexible rubber components.

7. A high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: A connecting spring (21) is fixedly installed on the side of the auxiliary guide plate (19), and a spring fixing piece (2101) is fixedly installed on the bottom of the inner cavity of the connecting valve body (3) on one side of the fixing seat (18). The side of the auxiliary guide plate (19) near the air supply pipe (1) is a concave component, the auxiliary guide plate (19) is an arc-shaped component, and the bottom of the inner cavity of the connecting valve body (3) is an elliptical structure.

8. A high-pressure hydrogen valve with high sealing performance according to claim 1, characterized in that: The buffer plate (23) is a memory metal component. The upper end of the inner ring recess of the buffer plate (23) is fixedly connected to the connecting valve body (3). The inner cavity top wall of the connecting valve body (3) is provided with a circular groove corresponding to the lower outer circle of the buffer plate (23).

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