High-pressure hydrogen valve with high sealing performance

Abstract

The invention discloses a high-pressure hydrogen valve with high sealing performance, and belongs to the technical field of high-pressure hydrogen valves. The high-pressure hydrogen valve with the high sealing performance comprises a connecting valve body, and an auxiliary flow guide plate is arranged and is overturned upwards, so that the pressure at the position of a sealing head is reduced; by arranging the structure of the inner adjusting cylinder, the pressure of the position of the communicating groove is shared, vibration caused by sudden change of the internal pressure is avoided, by arranging the structure of the buffer plate, the pressure of hydrogen impact is changed into elastic potential energy to be absorbed, and meanwhile in the process of pushing the damping push plate, the damping effect is improved. By arranging the structure of the indicating push rod, magnetic repulsive force can horizontally push the magnetic piece and the indicating push rod to move forwards, whether the internal pressure exceeds the safety range or not can be observed according to the moving distance of the indicating push rod, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure hydrogen valves, and more particularly to a high-pressure hydrogen valve with high sealing performance. Background Art

[0002] In the transportation and application system of high-pressure hydrogen, valves play a vital role. They are used to control the flow and cutoff of hydrogen. At present, there are some problems that are difficult to ignore during the closing process of common high-pressure hydrogen valves.

[0003] When the existing high-pressure hydrogen valve is closed, due to the limitations of the valve structure design, the pressure at the valve position will change significantly. This pressure change is not a smooth transition, but a large fluctuation. When the valve begins to close, the flow channel gradually narrows, and the flow rate of hydrogen will increase sharply. According to the principles of fluid mechanics, the increase in flow rate will lead to a decrease in local pressure, forming a complex pressure field. When the valve is completely closed, the fluid stops flowing instantly, and the kinetic energy is quickly converted into pressure energy, causing the pressure at the valve position to rise instantly. This drastic change in pressure will be further transmitted to the connected pipeline system. The large fluctuation in pressure will pose a severe test to the sealing performance of the pipeline system. The seals of the pipeline are in this pressure alternating environment for a long time, and are prone to aging and deformation, which will lead to hydrogen leakage. Hydrogen is a flammable and explosive gas. Once it leaks, it will seriously threaten the safety of personnel and the stable operation of production facilities. Secondly, frequent pressure changes will cause vibration of the pipeline. Due to the uneven pressure changes, the pipeline will produce different degrees of stress concentration. When the stress exceeds the fatigue limit of the pipeline material, fatigue cracks will appear in the pipeline. As time accumulates, the cracks continue to expand and may eventually cause the pipeline to rupture, resulting in catastrophic consequences. In addition, this vibration will also produce a lot of noise, causing noise pollution to the working environment. The pressure shock when the valve is closed will also cause serious wear on the valve itself. The instantaneous change of pressure will cause the sealing surface, valve core and other components inside the valve to bear huge impact forces, accelerating the wear of these components. Summary of the invention

[0004] The object of the present invention is to provide a high-sealing high-pressure hydrogen valve to solve the problems raised in the above-mentioned background technology.

[0005] A high-sealing high-pressure hydrogen valve comprises a connecting valve body, one end of the connecting valve body is provided with an air supply pipeline, the other end of the connecting valve body is provided with an air outlet pipeline, a top sealing member is fixedly installed on the upper end of the connecting valve body, an outer adjusting cylinder is threadedly installed in the middle part of the top sealing member, a cylindrical sealing member is fixedly installed on the lower end of the top sealing member, an isolation sheet is fixedly installed on the upper end of the top sealing member, an inner adjusting cylinder is threadedly installed in the middle part of the outer adjusting cylinder, a sealing head is fixedly installed on the lower end of the cylindrical sealing member, a sealing groove is fixedly installed on the lower end of the sealing head, a sealing plate is fixedly installed on the middle part of the connecting valve body, a connecting groove is provided in the middle part 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 provided on the lower end of the buffer plate, a rubber film is fixedly installed on the upper end of the buffer plate, a protective film is fixedly installed in the inner cavity of the buffer plate, and a plurality of shock-absorbing springs are fixedly installed in an annular manner on the inner side of the protective film; A mounting plate is fixedly mounted on the lower end of the outer adjustment cylinder, a limit rod is fixedly mounted on the lower end of the mounting plate, a fixing seat is fixedly mounted on the bottom side of the inner cavity of the connecting valve body, an auxiliary guide plate is rotatably mounted on the upper end of the fixing seat, and a fixing groove is opened on the upper end of the auxiliary guide plate; 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 on the front end of the buffer tube, a warning outer shell is fixedly installed on the middle of the front side of the connecting cover plate, an indicating groove is opened in the middle of the warning outer shell, an indicating push rod is arranged on the inner side of the indicating groove, a magnetic sheet is fixedly installed on the rear end of the indicating push rod, and a scale plate is fixedly installed on the side of the warning outer shell.

[0006] Furthermore, the air supply pipe and the connecting valve body, the air outlet pipe and the connecting valve body, the top sealing member and the connecting valve body are all fixedly connected by fixing bolts, and a reinforcing base is fixedly mounted on the lower end of the connecting valve body.

[0007] By adopting the above technical solution, the air supply pipe and the connecting valve body, the air outlet pipe and the connecting valve body, the top seal and the connecting valve body can be easily installed and fixed, and are convenient for disassembly and assembly.

[0008] Furthermore, a reinforcing plate is threadedly provided on the middle outer side of the outer adjusting tube, connecting columns are threadedly provided on the front and rear sides of the reinforcing plate, and a pair of sealing clamps are provided on both sides of the outer adjusting tube below the reinforcing plate, and the sealing clamps are fixedly connected by sealing bolts.

[0009] By adopting the above technical solution and providing a sealing clamp structure, the cylindrical sealing member can be sealed and limited, thereby increasing the sealing performance of the overall connected valve body and improving stability.

[0010] Furthermore, a valve mounting piece is fixedly mounted on the upper end of the outer adjusting cylinder and the upper end of the inner adjusting cylinder, and the valve mounting piece is a square component.

[0011] By adopting the above technical solution, the operator can fix the corresponding handwheel at the position of the valve mounting part, and can conveniently perform twist adjustment on the outer adjustment cylinder and the inner adjustment cylinder respectively, so as to control the overall internal switch.

[0012] Furthermore, the lower end of the sealing head is a cylindrical component, and the upper end of the sealing plate located at the connecting groove is provided with a circular groove corresponding to the lower end of the sealing head.

[0013] By adopting the above technical solution, when the sealing head descends to the communicating groove, the lower end of the sealing head can be accurately embedded in the circular groove opened in the communicating groove, so that the sealing head can seal the sealing plate.

[0014] Furthermore, the buffer plate is a plurality of semicircular ring-shaped components, and the rubber membrane and the protective film are flexible rubber material components.

[0015] 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 film 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 change in the internal pressure of the connecting valve body, thereby effectively avoiding vibration of the connecting valve body.

[0016] Furthermore, a connecting spring is fixedly installed on the side of the auxiliary guide plate, a spring fixing part is fixedly installed on the bottom of the inner cavity of the connecting valve body on one side of the fixed seat, the side of the auxiliary guide plate close to the air supply 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.

[0017] By adopting the above technical solution, the lower end of the connecting spring is fixedly connected to the spring fixing part. When the auxiliary guide plate is flipped, the connecting spring can be rotated at the position of the spring fixing part, so that a certain pulling force can always be applied to the auxiliary guide plate. When one end of the auxiliary guide plate provided with the concave structure contacts the lower side of the sealing plate, only a tiny gap is left for hydrogen to flow, thereby effectively reducing the pressure at the connecting groove position. When the auxiliary guide plate is flipped by the airflow pressure, the elliptical structure connected to the bottom wall of the inner cavity of the 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.

[0018] Furthermore, the buffer plate is a memory metal material component, the upper end of the inner ring recess of the buffer plate is fixedly connected to the connecting valve body, and the top wall of the inner cavity of the connecting valve body is provided with a circular groove body corresponding to the outer edge of the lower end of the buffer plate.

[0019] By adopting the above technical solution, when the buffer plate is subjected to pressure shock, the lower edge of the buffer plate will be deformed by the pressure, and the side edge of the buffer plate will deform and slide upward along the circular groove body set on the top wall of the inner cavity of the connecting valve body, so that the pressure inside the connecting valve body to a certain extent can be converted into the elastic potential energy of the shock-absorbing spring for absorption and storage.

[0020] Compared with the prior art, the advantages of the present invention are: 1. In the present invention, by providing a structure with an auxiliary guide plate, when the sealing head is close to the position of the connecting groove, as the gap of the connecting groove becomes smaller, the hydrogen flow rate inside the connecting groove increases, and the auxiliary guide plate flips upward, thereby reducing the pressure at the sealing head position and reducing the impact of the air flow pressure on the sealing head position.

[0021] 2. In the present invention, by providing a structure with an inner adjustment cylinder, when the cylindrical seal is closed, the inner adjustment cylinder can be adjusted to move downward so that the limit rod can press downward against the auxiliary guide plate. When the valve is reopened, one end of the auxiliary guide plate can reduce the amount of hydrogen passing through, share the pressure at the connecting groove position, and avoid vibration caused by sudden changes in internal pressure.

[0022] 3. In the present invention, by providing a structure with a buffer plate, during the switching process, the pressure of the hydrogen impact is converted into elastic potential energy and absorbed. At the same time, in the process of pushing the damping push plate, the pressure is converted into friction to generate heat, thereby reducing the impact of pressure on the internal pipeline.

[0023] 4. In the present invention, by providing a structure with an indicating push rod, when the magnetic core is pushed, the magnetic repulsive force will horizontally push the magnetic sheet and the indicating push rod forward. The distance the indicating push rod moves can be used to observe whether the internal pressure exceeds the safe range, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at A; Figure 4 For the present invention Figure 2 A magnified view of the structure at B in FIG. Figure 5 For the present invention Figure 2 A magnified view of the structure at C in FIG. Figure 6 It is a longitudinal cross-sectional view of the overall structure of the present invention; Figure 7 is a structural cross-sectional view of a buffer tube of the present invention; Figure 8 This is a schematic diagram of the internal hydrogen flow when the present invention is turned on; Fig. 9 It is a schematic diagram of the internal hydrogen flow during the closing process of the present invention; Fig.10 It is a schematic diagram of the internal structure of the present invention when it is closed.

[0025] Explanation of the numbers in the figure: 1. Air supply pipeline; 2. Fixing bolts; 3. Connecting valve body; 4. Strengthening base; 5. Buffer tube; 6. Connecting cover plate; 601. Indicator groove; 7. Scale plate; 8. Warning outer shell; 9. Top seal; 10. Isolation plate; 11. Valve mounting piece; 12. Inner adjustment cylinder; 1201. Mounting plate; 1202. Limit rod; 13. Outer adjustment cylinder; 14. Sealing fixture; 1401. Sealing bolt; 15. Air outlet pipeline; 16. Sealing plate; 1601. Connecting Groove; 17, cylindrical seal; 18, fixed seat; 19, auxiliary guide plate; 20, fixed groove; 21, connecting spring; 2101, spring fixing; 22, shock-absorbing spring; 23, buffer plate; 2301, rubber film; 2302, guide hole; 24, protective film; 25, sealing head; 2501, sealing groove; 26, reinforcement plate; 2601, connecting column; 27, damping groove; 28, damping push plate; 29, magnetic core; 30, buffer spring; 31, magnetic sheet; 32, indicating push rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 - Fig.10As shown, the embodiment of the present invention provides: comprising a connecting valve body 3, one end of the connecting valve body 3 is provided with an air supply pipe 1, the other end of the connecting valve body 3 is provided with an air outlet pipe 15, the upper end of the connecting valve body 3 is fixedly installed with a top seal 9, the middle thread of the top seal 9 is provided with an outer adjustment cylinder 13, the lower end of the top seal 9 is fixedly installed with a cylindrical seal 17, the upper end of the top seal 9 is fixedly installed with a spacer 10, the middle thread of the outer adjustment cylinder 13 is provided with an inner adjustment cylinder 12, and the lower end of the cylindrical seal 17 is fixedly installed with A sealing head 25, 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, a plurality of guide holes 2302 are opened at equal intervals at the lower end of the buffer plate 23, a rubber film 2301 is fixedly installed on the upper end of the buffer plate 23, a protective film 24 is fixedly installed in the inner cavity of the buffer plate 23, and a plurality of shock-absorbing springs 22 are fixedly installed in an annular shape on the inner side of the protective film 24; The lower end of the outer regulating cylinder 13 is fixedly installed with a mounting plate 1201, the lower end of the mounting plate 1201 is fixedly installed with a limit rod 1202, the bottom side of the inner cavity connected to the valve body 3 is fixedly installed with a fixing seat 18, the upper end of the fixing seat 18 is rotatably provided with an auxiliary guide plate 19, and the upper end of the auxiliary guide plate 19 is provided with a fixing groove 20; 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 installed 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 on the front end of the buffer tube 5, a warning outer shell 8 is fixedly installed on the middle of the front side of the connecting cover plate 6, an indicating groove 601 is opened in the middle of the warning outer shell 8, an indicating push rod 32 is arranged on the inner side of the indicating groove 601, a magnetic sheet 31 is fixedly installed on the rear end of the indicating push rod 32, and a scale plate 7 is fixedly installed on the side of the warning outer shell 8; The air supply pipe 1 and the connecting valve body 3, the air outlet pipe 15 and the connecting valve body 3, the top seal 9 and the 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. The air supply pipe 1 and the connecting valve body 3, the air outlet pipe 15 and the connecting valve body 3, the top seal 9 and the connecting valve body 3 can be conveniently installed and fixed, and are convenient for disassembly and assembly; A reinforcing plate 26 is provided on the outer thread of the middle part of the outer adjusting cylinder 13, and connecting columns 2601 are provided 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, and the sealing clamps 14 are fixedly connected by sealing bolts 1401. By providing a structure with the sealing clamps 14, the cylindrical sealing member 17 can be sealed and limited, thereby increasing the sealing performance of the overall connection valve body 3 and improving the stability. The upper ends of the outer adjustment cylinder 13 and the inner adjustment cylinder 12 are both fixedly mounted with valve mounting parts 11, and the valve mounting parts 11 are square components. The operator can fix the corresponding hand wheel at the position of the valve mounting parts 11, and can conveniently perform twisting adjustment on the outer adjustment cylinder 13 and the inner adjustment cylinder 12 respectively, so as to control the switch inside the whole; The lower end of the sealing head 25 is a cylindrical member, and the upper end of the sealing plate 16 located at the connecting groove 1601 is provided with a circular groove corresponding to the lower end of the sealing head 25. When the sealing head 25 is lowered to the connecting groove 1601, the lower end of the sealing head 25 can be accurately embedded in the circular groove provided in the connecting groove 1601, so that the sealing head 25 can seal the sealing plate 16; The buffer plate 23 is a plurality of semicircular ring components, and the rubber film 2301 and the protective film 24 are flexible rubber components. When the buffer plate 23 is subjected to the impact pressure of the liquid, the pressure on the buffer plate 23 will cause the rubber film 2301 to deform and compress, and 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 the internal pressure of the connecting valve body 3, thereby effectively avoiding the vibration of the connecting valve body 3; 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 side of the fixing seat 18 at the bottom of the inner cavity of the connecting valve body 3. The side of the auxiliary guide plate 19 close to the air supply pipe 1 is a concave component, and 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 piece 2101. When the auxiliary guide plate 19 is turned over, the connecting spring 21 can rotate at the position of the spring fixing piece 2101, so that a certain pulling force can always be applied to the auxiliary guide plate 19. When one end of the auxiliary guide plate 19 provided with the concave structure contacts the lower side of the sealing plate 16, there is only a tiny 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 turned over 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, so that the auxiliary guide plate 19 is turned over. The buffer plate 23 is a component made of memory metal material, and the upper end of the inner ring recess of the buffer plate 23 is fixedly connected to the connecting valve body 3. The top wall of the inner cavity of the connecting valve body 3 is provided with a circular groove body corresponding to the outer edge of the lower end of the buffer plate 23. When the buffer plate 23 is subjected to pressure impact, the lower side edge of the buffer plate 23 will be deformed by the pressure, and the side edge of the buffer plate 23 will deform and slide upward along the circular groove body provided on the top wall of the inner cavity of the connecting valve body 3, so that 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.

[0028] Working principle of the present invention: Embodiment 1, according to Figure 8As shown, when the connection valve body 3 is in an open state, the high-pressure hydrogen in the 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, and an auxiliary guide plate 19 is rotatably provided on the upper side of the fixing seat 18. The auxiliary guide plate 19 is in a horizontal equilibrium state when the connection spring 21 is stretched; according to Figure 1 , 2 As shown in FIG. 5 , the installer can fix the hand wheel at the position of the valve mounting member 11 of the outer adjusting cylinder 13 and the inner adjusting cylinder 12, and rotate the hand wheel of the outer adjusting cylinder 13. When the outer adjusting cylinder 13 rotates, the lower cylindrical seal 17 is driven to descend. The sealing head 25 is fixedly installed on the lower side of the cylindrical seal 17. When the hand wheel is used to rotate the cylindrical seal 17 downward, the descending range of the cylindrical seal 17 is the same as the thread width, which is relatively constant. according to Fig. 9 As 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 on both sides of the air supply pipe 1 and the air outlet pipe 15 remains unchanged, the hydrogen flow rate will increase when the high-pressure hydrogen passes through the connecting groove 1601. When the auxiliary guide plate 19 is inside the auxiliary guide plate 19 and at the lower side of the sealing plate 16, the air pressure near the sealing plate 16 will increase, and the space at the bottom of the auxiliary guide plate 19 will be in a low pressure state. At this time, the auxiliary guide plate 19 is in a low pressure state. As the cylindrical seal 17 moves downward, the guide plate 19 is driven by the hydrogen gas flow, and the end close to the gas delivery pipe 1 will rotate toward the sealing plate 16. Its dynamic change can block the passing hydrogen to a certain extent. At this time, the flow channel area of ​​the hydrogen gradually decreases. Even if the downward amplitude of the cylindrical seal 17 is constant, the flow channel area of ​​the hydrogen will change dynamically, avoiding sudden changes in pressure, thereby dynamically reducing the hydrogen flow rate at the position of the connecting groove 1601, sharing the pressure at the position of the sealing head 25, and effectively extending the service life of the sealing head 25; according to Fig.10As shown, when the sealing head 25 is completely closed, the air supply pipe 1 and the air outlet pipe 15 are completely disconnected, and the operator can control the inner adjusting cylinder 12 to rotate downward, so that the limit rod 1202 at the bottom of the inner adjusting cylinder 12 is inserted into the fixing groove 20 provided on the upper side of the auxiliary guide plate 19. At this time, the end of the auxiliary guide plate 19 close to the air supply pipe 1 is in contact with the sealing plate 16. Since the side of the auxiliary guide plate 19 close to the air supply pipe 1 is a concave component, when the end of the auxiliary guide plate 19 provided with the concave structure is in contact with the lower side of the sealing plate 16, there is only a tiny gap for hydrogen to flow. At this time, when it is necessary to open the connecting valve body 3, the outer adjusting cylinder 13 is rotated. Generally speaking, the connecting groove 1601 position is suddenly connected, which will produce a large pressure difference change, and the tiny 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 generated, and effectively avoiding the vibration of the device caused by pressure fluctuations. In the second embodiment, when the sealing head 25 is switched on and off, the hydrogen in the connecting groove 1601 inevitably increases the flow rate at the position of the sealing head 25 and the connecting groove 1601, and at this time, the pressure at the position of the connecting valve body 3 on the upper side of the sealing plate 16 will increase. By designing a structure with a buffer plate 23, when the hydrogen passes through the sealing head 25 and the connecting groove 1601, it will push the buffer plate 23 to move for cleaning. A number of shock-absorbing springs 22 are equidistantly arranged around the buffer plate 23. When the buffer plate 23 is deformed by the impact of hydrogen, it will push the buffer plate 23 to move, and finally the shock-absorbing spring 22 will undergo elastic deformation. The shock-absorbing spring 22 can play a certain shock-absorbing role on the impact of pressure, thereby effectively avoiding the vibration of the connecting valve body 3 caused by the impact of internal gas, and avoiding the loosening of the connection position of the air supply pipeline 1, the connecting valve body 3 and the air outlet pipeline 15. When the sealing head 25 is in the process of switching, when the pressure on the upper side of the valve body 3 connected to it changes, the pressure increase will push the damping push plate 28 to move inside the damping groove 27. When the buffer spring 30 undergoes elastic deformation, it will absorb a certain amount of pressure energy. The buffer spring 30 consumes energy by moving the damping structure of the damping push plate 28 and the damping groove 27, and converts the pressure into heat energy through friction, which can effectively reduce the pressure peak inside the pipeline system of the cylindrical seal 17 during the switching process, thereby reducing the impact on the pipeline system. 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 are the same magnetic pole, and the buffer tube 5 is a non-magnetic structure. When the magnetic core 29 moves forward, the Lorentz magnetic force can push the magnetic sheet 31 to move forward, and a transparent scale plate 7 is provided on the side of the warning shell 8. The operator can intuitively observe the maximum pressure inside the pipeline by indicating the distance that the push rod 32 extends forward, so as to judge whether there is a problem of abnormal pressure exceeding its safety range during the pipeline switching process, which is convenient for inspection and maintenance.

[0029] The above shows and describes 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 by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A high-sealing high-pressure hydrogen valve, 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 sealing member (9) is fixedly mounted on the upper end of the connecting valve body (3). An outer adjustment cylinder (13) is threadedly mounted on the middle portion of the top sealing member (9). A cylindrical sealing member (17) is fixedly mounted on the lower end of the top sealing member (9). An isolation sheet (10) is fixedly mounted on the upper end of the top sealing member (9). An inner adjustment cylinder (12) is threadedly mounted on the middle portion of the outer adjustment cylinder (13). A sealing head (25) is fixedly mounted on the lower end of the cylindrical sealing member (17). A sealing groove (2501) is fixedly mounted on the lower end of the head (25), a sealing plate (16) is fixedly mounted on the middle part of the connecting valve body (3), a connecting groove (1601) is provided in the middle part of the sealing plate (16), a buffer plate (23) is fixedly mounted on the upper side of the inner cavity of the sealing plate (16), a plurality of flow guide holes (2302) are equidistantly provided on the lower end of the buffer plate (23), a rubber membrane (2301) is fixedly mounted on the upper end of the buffer plate (23), a protective membrane (24) is fixedly mounted on the inner cavity of the buffer plate (23), and a plurality of shock-absorbing springs (22) are fixedly mounted in an annular shape on the inner side of the protective membrane (24); A mounting plate (1201) is fixedly mounted on the lower end of the outer adjustment cylinder (13), a limit rod (1202) is fixedly mounted on the lower end of the mounting plate (1201), a fixing seat (18) is fixedly mounted on the bottom side of the inner cavity of the connecting valve body (3), an auxiliary guide plate (19) is rotatably mounted on the upper end of the fixing seat (18), and a fixing groove (20) is formed on the upper end of the auxiliary guide plate (19); A buffer tube (5) is fixedly mounted on the upper front side of the connecting valve body (3); a damping groove (27) is fixedly mounted in the middle of the inner cavity of the buffer tube (5); a damping push plate (28) is slidably mounted on the inner side of the damping groove (27); a magnetic core (29) is fixedly mounted on the side of the damping push plate (28); a buffer spring (30) is fixedly mounted on the outer side of the magnetic core (29); a connecting cover plate (6) is fixedly mounted on the front end of the buffer tube (5); a warning outer shell (8) is fixedly mounted on the middle of the front side of the connecting cover plate (6); an indicating groove (601) is opened in the middle of the warning outer shell (8); an indicating push rod (32) is arranged on the inner side of the indicating groove (601); a magnetic sheet (31) is fixedly mounted on the rear end of the indicating push rod (32); and a scale plate (7) is fixedly mounted on the side of the warning outer shell (8).

2. A high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: The air supply pipe (1) and the connecting valve body (3), the air outlet pipe (15) and the connecting valve body (3), and the top sealing member (9) and the connecting valve body (3) are all fixedly connected via fixing bolts (2), and a reinforcing base (4) is fixedly mounted on the lower end of the connecting valve body (3).

3. A high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: A reinforcing plate (26) is threadedly provided on the outer side of the middle portion of the outer adjustment tube (13); connecting columns (2601) are threadedly provided on the front and rear sides of the reinforcing plate (26); and a pair of sealing clamps (14) are provided on both sides of the outer adjustment tube (13) below the reinforcing plate (26); the sealing clamps (14) are fixedly connected via sealing bolts (1401).

4. A high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: A valve mounting member (11) is fixedly mounted on the upper end of the outer adjustment cylinder (13) and the upper end of the inner adjustment cylinder (12), and the valve mounting member (11) is a square member.

5. A high-sealing high-pressure hydrogen valve 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 is provided with a circular groove corresponding to the lower end of the sealing head (25).

6. A high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: The buffer plate (23) is a plurality of semi-circular ring-shaped components, and the rubber membrane (2301) and the protective membrane (24) are components made of flexible rubber material.

7. A high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: A connecting spring (21) is fixedly mounted on the side of the auxiliary guide plate (19); a spring fixing member (2101) is fixedly mounted on the bottom of the inner cavity of the connecting valve body (3) located on one side of the fixing seat (18); a side of the auxiliary guide plate (19) close to 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. The high-sealing high-pressure hydrogen valve according to claim 1, characterized in that: The buffer plate (23) is a memory metal material component, the upper end of the inner ring recess of the buffer plate (23) is fixedly connected to the connecting valve body (3), and the top wall of the inner cavity of the connecting valve body (3) is provided with a circular groove body corresponding to the outer circle of the lower end of the buffer plate (23).

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