Multi-redundancy sealing ball valve for hydrogen conveying pipeline

Abstract

The invention belongs to the technical field of pipeline ball valves, and particularly relates to a multi-redundancy sealing ball valve for a hydrogen conveying pipeline, which comprises a valve body, a ball valve component, a switch assembly and two blocking modules. The ball valve assembly is used for opening or closing gas conveying of the hydrogen conveying pipeline. The switch assembly is detachably connected with the valve body and used for controlling the valve rod to rotate. The two blocking modules and the valve body are coaxially arranged, after the ball valve assembly is closed, the two blocking modules can further block conveyed gas, and the purpose of double blocking is achieved. According to the invention, through the dual sealing of the ball valve and the blocking assembly and the anti-permeation effect of the sealing assembly, the gas in the pipeline can stay outside the blocking assembly, even if the sealing between the ball valve and the valve body is abnormal, the gas can be blocked through the blocking assembly, and the dual-guarantee effect is achieved. The sealing assembly enables the gas not to permeate out of the sealing ball valve through a gap of the valve body when the gas is outside the blocking assembly, and the sealing performance of the sealing ball valve is further improved.

Description

Technical Field

[0001] This invention belongs to the field of pipeline ball valve technology, specifically a multi-redundant sealing ball valve for hydrogen transportation pipelines. Background Technology

[0002] Hydrogen, as a clean secondary energy source with broad application prospects, is a crucial support for the low-carbon transformation of new energy industries, industrial production, and transportation. Its large-scale, safe, and stable transportation is a core link in the successful implementation of the hydrogen energy industry chain. Currently, hydrogen transportation technologies are mainly based on three states: gaseous, liquid, and solid. Gaseous transportation can be achieved by modifying existing natural gas pipelines, constructing new dedicated pipelines, or using high-pressure cylinders for vehicle transport. Liquid transportation requires cryogenic liquefaction followed by transfer using insulated tank trucks and other equipment. Solid transportation utilizes materials such as metal hydrides and organic liquid hydrogen storage carriers, achieving hydrogen storage and transfer through adsorption or chemical reaction. These various technologies, based on different principles and application scenarios, form differentiated technical paths, providing fundamental support for the practical application and industrial expansion of hydrogen energy.

[0003] The transportation of gaseous hydrogen is currently the mainstream technology for large-scale hydrogen transportation, and it is gradually maturing based on the application needs of hydrogen energy in industrial production, distributed energy supply, and transportation. Its technology system is mainly built around two core modes: one is pipeline transportation, which can achieve hydrogen blending and transportation by adapting existing natural gas pipeline networks, or by building dedicated hydrogen transportation pipelines according to the hydrogen energy industry layout, so as to meet the large-scale, long-distance hydrogen supply needs in a continuous transportation form.

[0004] In the process of hydrogen transportation, the sealing ball valve for hydrogen pipelines is a key core component of the gaseous hydrogen pipeline transportation system. It is mainly used to control the opening and closing of hydrogen in the pipeline, regulate flow, and isolate the medium. Its technological research and application are gradually advancing based on the industrial demand for long-distance, large-scale pipeline transportation of gaseous hydrogen. This type of valve needs to be adapted to the physicochemical properties of hydrogen, such as its low molecular weight, high permeability, and flammability and explosiveness. Targeted technical solutions have been developed in terms of material selection and sealing structure design to adapt to the pressure level, transportation conditions, and safety operation requirements of the hydrogen pipeline. It is an important equipment support for ensuring the sealing performance, reliability, and stability of the gaseous hydrogen pipeline transportation system.

[0005] Typical sealing ball valves used in hydrogen pipelines only block gas flow by closing the ball valve. When the sealing effect is poor, hydrogen will leak out directly through the gap between the ball valve and the valve body, posing a transportation risk and making maintenance difficult. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a multi-redundant sealing ball valve for hydrogen pipelines. This invention primarily addresses the problem in existing technologies where, when the sealing effect is poor, hydrogen gas can leak directly through the gap between the ball valve and the valve body, posing a transportation risk and creating maintenance difficulties.

[0007] The technical solution adopted by this invention to solve its technical problem is: This invention provides a multi-redundant sealing ball valve for hydrogen pipelines, comprising: a valve body, a ball valve assembly, a switch assembly, and two blocking modules. The ball valve assembly includes a valve stem rotatably connected to the valve body; the switch assembly is detachably connected to the valve body and is used to drive the valve stem to rotate; the two blocking modules are coaxially arranged with the valve body; each blocking module includes a blocking component and a transmission component, the transmission component engaging with the ball valve assembly to control the opening and closing of the blocking component; the blocking component includes a drive ring, a rotator, and multiple isolation members, the drive ring being rotatably connected to the valve body, the rotator being fixedly connected to the drive ring, and the multiple isolation members arranged in a ring array and fitted in pairs, with the isolation members slidably connected to the rotator.

[0008] According to the present invention, a multi-redundant sealing ball valve for hydrogen transportation pipelines includes a valve body comprising a control compartment and two connecting ends. The two connecting ends are located at both ends of the control compartment and are fixedly connected to it. A switch assembly is detachably connected to the control compartment, and the two connecting ends communicate with the control compartment.

[0009] According to the present invention, a multi-redundant sealing ball valve for hydrogen transportation pipelines is provided. The ball valve assembly further includes a ball valve, a drive gear, and a fixed base. The drive gear is fixedly connected to the valve stem, the ball valve is fixedly connected to the valve stem, the ball valve is rotatably connected to the fixed base, and the fixed base is detachably connected to the control compartment. Multiple sealing rings are coaxially arranged and fixedly connected on both the valve stem and the fixed base.

[0010] According to the present invention, a multi-redundant sealing ball valve for a hydrogen pipeline includes a transmission assembly comprising a transmission gear ring and a transmission gear. The transmission gear ring is rotatably connected to a control chamber and meshes with a drive gear. The transmission gear is rotatably connected to the control chamber and meshes with the transmission gear ring. The transmission gear meshes with a blocking assembly.

[0011] According to the present invention, a multi-redundant sealing ball valve for hydrogen pipelines includes a transmission gear ring comprising a ring body, horizontal teeth, vertical teeth, and multiple rollers. The ring body is rotatably connected to a control chamber, the horizontal teeth mesh with a drive gear, the vertical teeth mesh with a transmission gear, and the multiple rollers are arranged in a ring array and rotatably connected to the ring body. A limiting groove is formed in the control chamber, and the rollers roll within the limiting groove.

[0012] According to the present invention, a multi-redundant sealing ball valve for hydrogen pipelines includes a blocking assembly further comprising a cover plate. The cover plate is fixedly connected to the control compartment, and the partition is slidably connected to the cover plate.

[0013] According to the present invention, a multi-redundant sealing ball valve for hydrogen pipelines includes a partition comprising a traction rod, a partition plate, and a limiting rod. The traction rod is slidably connected to a rotator, fixedly connected to one side of the partition plate, and fixedly connected to the other side of the partition plate. The limiting rod is slidably connected to a cover plate.

[0014] The present invention provides a multi-redundant sealing ball valve for hydrogen pipelines, further comprising a sealing assembly for sealing the gap between the control chamber and the connection end. The sealing assembly includes a plurality of springs and a sealing ring, wherein the plurality of springs are arranged in a ring array within the connection end, one end of each spring abutting against the connection end and the other end abutting against the sealing ring. The sealing ring is slidably connected to the connection end and abuts against the control chamber.

[0015] According to the present invention, a multi-redundant sealing ball valve for hydrogen pipelines further includes a valve seat detachably connected to a control compartment and abutting against the ball valve. The valve seat includes a plurality of springs and a sealing body. The plurality of springs are arranged in a ring array within the control compartment and abut against the control compartment. One side of the sealing body abuts against the springs, and the other side abuts against the ball valve.

[0016] According to the present invention, a multi-redundant sealing ball valve for hydrogen transportation pipelines is provided. The switching assembly includes a package, a worm gear module and a rotor. The package is fixedly connected to the control compartment. The worm gear module is disposed inside the package. The rotor is fixedly connected to the worm gear module and the valve stem is fixedly connected to the worm gear module.

[0017] The beneficial effects of this invention are as follows: This invention provides a multi-redundant sealing ball valve for hydrogen pipelines. Through the dual sealing of the ball valve and the blocking assembly, combined with the anti-permeability function of the sealing assembly, gas inside the pipeline is kept outside the blocking assembly, rather than outside the ball valve. Even if a sealing abnormality occurs between the ball valve and the valve body, the blocking assembly can still block the gas, thus providing double protection. Furthermore, the presence of the sealing assembly prevents gas from seeping through the gap between the control chamber and the connecting chamber and sealing the ball valve when it is blocked outside the blocking assembly, further enhancing the sealing performance of the ball valve. This forms a triple-redundant protection specifically adapted to the easily leaking characteristics of hydrogen, effectively avoiding the risk of hydrogen leakage in case of sealing abnormalities and providing further assurance for future maintenance. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a multi-redundant sealing ball valve for hydrogen transportation pipelines provided in an embodiment of the present invention; Figure 2 This is a front view of a multi-redundant sealing ball valve for hydrogen pipelines provided in an embodiment of the present invention; Figure 3 This is a top view of a multi-redundant sealing ball valve for hydrogen pipelines provided in an embodiment of the present invention; Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along the AA direction; Figure 5 yes Figure 4 A magnified schematic diagram of the local structure of region B in the middle; Figure 6 yes Figure 1 A partial structural diagram of a multi-redundant sealing ball valve used in hydrogen pipelines; Figure 7 yes Figure 6 Side view; Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure along the CC direction; Figure 9 yes Figure 6 A schematic diagram of the exploded structure of the central blocking component; Figure 10 yes Figure 9 A three-dimensional structural diagram of the rotator; Figure 11 yes Figure 9 A three-dimensional structural diagram of the central partition component; Figure 12 yes Figure 1 A three-dimensional structural diagram of the central switch assembly.

[0020] In the diagram: 1. Valve body; 11. Control compartment; 111. Limit groove; 12. Connecting end; 2. Ball valve assembly; 21. Valve stem; 22. Ball valve; 23. Drive gear; 24. Fixed base; 3. Switch assembly; 31. Encapsulation; 32. Worm gear module; 33. Rotary wheel; 4. Blocking module; 41. Blocking assembly; 42. Transmission assembly; 411. Drive ring; 412. Rotator; 4121. Traction slide 413. Groove; 4131. Partition; 4132. Traction rod; 4133. Partition plate; 4133. Limiting rod; 414. Cover plate; 4141. Guide groove; 421. Transmission gear ring; 4211. Ring body; 4212. Horizontal tooth; 4213. Vertical tooth; 4214. Roller; 422. Transmission gear; 5. Sealing assembly; 51. Spring one; 52. Sealing ring; 6. Valve seat; 61. Spring two; 62. Sealing body. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 12As shown in the figure, an embodiment of the present invention provides a multi-redundant sealing ball valve for hydrogen pipelines, comprising: a valve body 1, a ball valve assembly 2, a switch assembly 3, and two blocking modules 4. The valve body 1 is typically forged from 316L stainless steel, a material with excellent resistance to hydrogen embrittlement and corrosion in high-pressure hydrogen environments, suitable for long-term operation. The ball valve assembly 2 includes a valve stem 21, which is rotatably connected to the valve body 1. A sealing and wear-resistant medium is filled between the valve stem 21 and the valve body 1 to improve the service life of the valve stem 21 and enhance the sealing effect between the valve stem 21 and the valve body 1. The sealing and wear-resistant medium is typically PTFE-impregnated braided graphite packing or a special grease for hydrogen environments, which not only reduces the rotational friction coefficient of the valve stem 21 but also effectively prevents trace amounts of high-pressure hydrogen from permeating. The switch assembly 3 is detachably connected to the valve body 1 and is used to control the rotation of the valve stem 21. The two blocking modules 4 are coaxially arranged with the valve body 1. The blocking module 4 includes a blocking component 41 and a transmission component 42. The transmission component 42 engages with the ball valve assembly 2 and is used to control the opening and closing of the blocking component 41.

[0023] The valve body 1 includes a control chamber 11 and two connecting ends 12. The two connecting ends 12 are located at both ends of the control chamber 11 and are fixedly connected to it. The connecting ends 12 are equipped with flange sealing surfaces or weld bevels conforming to national or industry standards to ensure reliable connection to the hydrogen pipeline. The switch assembly 3 is detachably connected to the control chamber 11, while the two connecting ends 12 communicate with the control chamber 11. Hydrogen gas can enter the connecting ends 12 through pipelines, then enter the ball valve assembly 2 within the control chamber 11, and finally exit through the other connecting end 12 to the next hydrogen pipeline.

[0024] The ball valve assembly 2 also includes a ball valve 22, a drive gear 23, and a fixed base 24. The drive gear 23 is fixedly connected to the valve stem 21, the ball valve 22 is fixedly connected to the valve stem 21, the ball valve 22 is rotatably connected to the fixed base 24, and the fixed base 24 is detachably connected to the control compartment 11. Multiple sealing rings are coaxially mounted and fixedly connected to both the valve stem 21 and the fixed base 24. The sealing rings are preferably made of fluororubber or fluorosilicone composite materials that are resistant to hydrogen embrittlement and have low permeability. The cross-sectional shape of the sealing rings can be O-shaped, rectangular, or a combination thereof, and the reliability of static and dynamic sealing is ensured through pre-compression design. For cryogenic or high-temperature hydrogen transport environments, perfluoroether rubber or specially formulated hydrogenated nitrile rubber can be selected as the sealing material. The surface of the ball valve 22 can be plated or sprayed with an anti-hydrogen permeation coating to extend its service life. The coating is typically titanium nitride, diamond-like carbon film, or metal-ceramic composite material, with a coating thickness of 5-20 micrometers, which can significantly reduce the diffusion rate of hydrogen atoms into the substrate material and mitigate hydrogen-induced damage.

[0025] The transmission assembly 42 includes a transmission gear ring 421 and a transmission gear 422. The transmission gear ring 421 is rotatably connected to the control chamber 11 and meshes with the drive gear 23. The transmission gear 422 is rotatably connected to the control chamber 11 and meshes with the transmission gear ring 421. The transmission gear 422 meshes with the blocking assembly 41. When the valve stem 21 in the ball valve assembly 2 is rotated, the drive gear 23 is driven to rotate, which in turn drives the transmission gear ring 421 to rotate. The transmission gear ring 421 then drives the transmission gear 422 to rotate, finally causing the blocking assembly 41 to operate, thereby controlling the communication between the control chamber 11 and the connecting end 12. All gear pairs are lubricated using a hydrogen-compatible solid lubricating film or a long-lasting paste lubricant to prevent grease from evaporating and contaminating hydrogen or reacting with hydrogen.

[0026] The transmission gear ring 421 includes a ring body 4211, horizontal teeth 4212, vertical teeth 4213, and multiple rollers 4214. The ring body 4211 is rotatably connected to the control chamber 11. The horizontal teeth 4212 mesh with the drive gear 23, and the vertical teeth 4213 mesh with the transmission gear 422. The multiple rollers 4214 are arranged in a ring and rotatably connected to the ring body 4211. A limiting groove 111 is provided in the control chamber 11, and the rollers 4214 roll within the limiting groove 111. When the drive gear 23 rotates, it meshes with the horizontal teeth 4212, thereby causing the ring body 4211 to rotate. When the ring body 4211 rotates, the rollers 4214 can change the sliding relationship between the ring body 4211 and the limiting groove 111 to rolling, thereby reducing the friction between them, improving transmission efficiency, and extending the service life of the transmission gear ring 421. Furthermore, the vertical teeth 4213 mesh with the transmission gear 422, transforming the lateral rotation of the transmission gear ring 421 into the vertical rotation of the transmission gear 422. The rollers 4214 are made of high-strength alloy steel, exhibiting low rolling resistance and reducing transmission friction and wear. Specifically, the rollers 4214 can be made of GCr15 bearing steel or 17-4PH precipitation-hardening stainless steel, with a surface treated by carburizing, quenching, and precision grinding, resulting in high hardness and good wear resistance. The geometry of the limiting groove 111 matches the array of rollers 4214 to ensure stable positioning of the rollers 4214 in both radial and axial directions, reducing movement clearance. Wear-resistant bushings can be embedded within the groove to further reduce wear and facilitate replacement.

[0027] The blocking assembly 41 includes a drive ring 411, a rotator 412, multiple partitions 413, and a cover plate 414. The drive ring 411 is rotatably connected to the control chamber 11, the rotator 412 is fixedly connected to the drive ring 411, the multiple partitions 413 are arranged in a circular array and fitted in pairs, the partitions 413 are slidably connected to the rotator 412, and the cover plate 414 is fixedly connected to the control chamber 11, while the partitions 413 are slidably connected to the cover plate 414. When the transmission gear 422 rotates, it drives the drive ring 411 to rotate, which in turn drives the rotator 412 to rotate. As the rotator 412 rotates, multiple partitions 413 are rotated synchronously by the rotator 412. Because the multiple partitions 413 are arranged in a ring and fit together in pairs, the partitions 413 will converge towards their rotation center under the combined action of the rotator 412 and the cover plate 414 until the tips of the multiple partitions 413 make contact, achieving a sealing effect. The contact stress is evenly distributed, and the opening and closing process is pure rolling or sliding friction, with stable torque and no jamming.

[0028] The partition 413 includes a traction rod 4131, a partition plate 4132, and a limiting rod 4133. The rotator 412 has multiple traction grooves 4121, and the cover plate 414 also has a guide groove 4141. The traction rod 4131 is slidably connected to the rotator 412, with its sliding end positioned within the traction groove 4121. The traction rod 4131 is fixedly connected to one side of the partition plate 4132, and the limiting rod 4133 is fixedly connected to the other side of the partition plate 4132. The limiting rod 4133 is slidably connected to the cover plate 414, with its sliding end positioned within the guide groove 4141. When the rotator 412 is rotated, the traction rod 4131 slides within the traction groove 4121 until it reaches one end of the traction groove 4121. As the distance between the traction groove 4121 and the center of the rotator 412 gradually increases, the traction groove 4121 causes the traction rod 4131 to gradually move away from or towards the center of the rotator 412. Furthermore, due to the constraint of the guide groove 4141 on the limiting rod 4133, and the annular array of multiple partitions 413 that are in pairs, the multiple partitions 4132 will eventually move in pairs towards or away from the center of the rotator 412, thus achieving the function of opening or closing the blocking assembly 41. The contact edges of the partitions 4132 have angled cutting edges or are fitted with hard alloy sealing strips, forming a line seal or narrow-face seal when closed, greatly improving the sealing pressure and effectively cutting off gas. The body of the partition 4132 can be made of the same 316L stainless steel as the valve body, or its surface can be hardened to enhance wear resistance.

[0029] The sealing ball valve also includes a sealing assembly 5 for sealing the gap between the control chamber 11 and the connecting end 12. The sealing assembly 5 includes multiple springs 51 and sealing rings 52. The multiple springs 51 are arranged in a ring array within the connecting end 12, with one end of each spring abutting against the connecting end 12 and the other end abutting against the sealing ring 52. The sealing ring 52 is slidably connected to the connecting end 12 and abuts against the control chamber 11. When connecting the connecting end 12 to the control chamber 11, firstly, the springs 51 are arranged in a ring array within the annular groove of the connecting end 12. Then, sealing rings are attached to the sealing ring 52. Next, the sealing ring 52 is placed within the annular groove, and then sealing rings of different diameters are attached to the exposed end of the sealing ring 52. Finally, the connecting end 12 and the control chamber 11 are connected using screws arranged in a ring array. During the tightening of the screws, the sealing ring 52, under the action of the springs 51 and the sealing rings, will adhere tightly to the control chamber 11, achieving excellent leak-proof performance. The sealing ring is a multi-layer composite seal, typically consisting of an inner layer of expanded graphite gasket, a middle layer of metal toothed gasket, and an outer O-ring, forming multiple sealing barriers to accommodate minor separation of the flange surface caused by temperature and pressure fluctuations.

[0030] The sealing ball valve also includes a valve seat 6, which is detachably connected to the control chamber 11 and abuts against the ball valve 22. The valve seat 6 includes multiple springs 61 and a sealing body 62. Multiple springs 61 are arranged in a ring array within the control chamber 11 and abut against it. One side of the sealing body 62 abuts against the springs 61, and the other side abuts against the ball valve 22, allowing the sealing body 62 to fit tightly against the ball valve 22 under the action of the springs 61. Even if the ball valve 22 rotates, the tightness of the fit will not decrease, thus achieving excellent leak-proof performance. The sealing body 62 can be made of reinforced polytetrafluoroethylene, para-polyphenylene ether, or PEEK, and may have an internal metal skeleton for reinforcement. The springs 61 ensure that an initial sealing force is provided at low pressure, and the sealing force automatically increases with the increase of medium pressure at high pressure, achieving a pressure self-tightening seal.

[0031] The switch assembly 3 includes a package 31, a worm gear module 32, and a rotating wheel 33. The package 31 is fixedly connected to the control chamber 11. The worm gear module 32 is housed within the package 31, and the rotating wheel 33 is fixedly connected to the worm gear module 32. The valve stem 21 is also fixedly connected to the worm gear module 32. The rotating wheel 33 controls the operation of the worm gear module 32, thereby driving the valve stem 21 to rotate. During operation, the worm gear module 32 increases torque and also provides a self-locking function, preventing the ball valve 22 from being rotated by the impact of flowing gas when opening or closing. Its worm helix angle is less than the equivalent friction angle, ensuring reliable self-locking. The module is entirely packaged, can be filled with hydrogen-compatible grease, and features a dustproof and waterproof seal, making it suitable for outdoor or harsh environments. The switch assembly 3 can also be expanded to include interfaces for electric, pneumatic, or hydraulic actuators.

[0032] When the sealing ball valve is opened, rotating wheel 33 activates the worm gear module 32, which in turn drives valve stem 21 to rotate. Valve stem 21 drives ball valve 22 to rotate, and simultaneously drives drive gear 23 to rotate. Through meshing with transverse gear 4212, drive ring 4211 to rotate. When ring 4211 rotates, roller 4214 changes the sliding relationship between ring 4211 and limiting groove 111 to rolling, reducing friction and improving transmission efficiency and service life of transmission gear ring 421. Furthermore, through meshing of vertical gear 4213 with drive gear 422, the transverse rotation of transmission gear ring 421 is changed to vertical rotation of drive gear 422. When drive gear 422 rotates, it drives drive ring 411 to rotate, which in turn drives rotator 412 to rotate. As rotator 412 rotates, traction rod 4131 slides within traction groove 4121 until it reaches one end of traction groove 4121. As the distance between the traction chute 4121 and the center of the rotator 412 gradually increases, the traction chute 4121 will cause the traction rod 4131 to gradually move away from the center of the rotator 412. As the limiting rod 4133 is restricted by the guide groove 4141, and multiple partitions 413 are arranged in a ring and attached to each other, multiple partitions 4132 will eventually move away from the center of the rotator 412, thus opening the blocking component 41. Finally, the two blocking components 41 will open simultaneously, and the ball valve 22 will connect the valve body 1, thus opening the sealing ball valve.

[0033] When the sealing ball valve is closed, the reverse rotation of the rotary wheel 33 causes the valve stem 21 to rotate in the opposite direction, which in turn causes the transmission gear 422 to rotate in the opposite direction, driving the drive ring 411 to rotate in the opposite direction, which in turn drives the rotator 412 to rotate in the opposite direction. As the rotator 412 rotates, the traction rod 4131 slides within the traction groove 4121 until it reaches the other end. The traction groove 4121 causes the traction rod 4131 to gradually approach the center of the rotator 412. Because the limiting rod 4133 is restricted by the guide groove 4141, and because multiple partitions 413 are arranged in a ring and fitted together, the multiple partitions 4132 move towards the center of the rotator 412, thus achieving the function of closing the blocking assembly 41. Finally, both blocking assemblies 41 close simultaneously, and the ball valve 22 disconnects the passage of the valve body 1, thus achieving the function of closing the sealing ball valve. When the sealing ball valve is closed, the gas in the pipeline remains outside the blocking component 41, rather than outside the ball valve 22. Even if there is a sealing abnormality between the ball valve 22 and the valve body 1, the gas can be blocked by the blocking component 41, thus providing a double protection. In extreme cases, even if one seal fails, the other seal can still work independently, buying time for maintenance and achieving a true multi-redundancy safety design. Furthermore, the presence of the sealing component 5 ensures that when gas is blocked outside the blocking component 41, it will not seep through the gap between the control chamber 11 and the connecting end 12 to the sealing ball valve, further enhancing the sealing performance of the sealing ball valve.

[0034] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-redundant sealing ball valve for hydrogen pipelines, characterized in that, include: Valve body (1); A ball valve assembly (2) includes a valve stem (21) rotatably connected to the valve body (1); The switch assembly (3) is detachably connected to the valve body (1) and is used to drive the valve stem (21) to rotate; Two blocking modules (4) are coaxially arranged with the valve body (1); the blocking module (4) includes a blocking component (41) and a transmission component (42), the transmission component (42) meshes with the ball valve component (2) and is used to control the opening and closing of the blocking component (41); the blocking component (41) includes a drive ring (411), a rotator (412) and multiple partitions (413), the drive ring (411) is rotatably connected to the valve body (1), the rotator (412) is fixedly connected to the drive ring (411), the multiple partitions (413) are arranged in a ring array and fit together in pairs, and the partitions (413) are slidably connected to the rotator (412).

2. The multi-redundant sealing ball valve for hydrogen pipelines according to claim 1, characterized in that, The valve body (1) includes a control chamber (11) and two connecting ends (12); the two connecting ends (12) are located at both ends of the control chamber (11) and are fixedly connected to the control chamber (11) respectively; the switch assembly (3) is detachably connected to the control chamber (11), and the two connecting ends (12) are connected to the control chamber (11).

3. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 2, characterized in that, The ball valve assembly (2) further includes a ball valve (22), a drive gear (23), and a fixed base (24); the drive gear (23) is fixedly connected to the valve stem (21), the ball valve (22) is fixedly connected to the valve stem (21), the ball valve (22) is rotatably connected to the fixed base (24), the fixed base (24) is detachably connected to the control compartment (11), and multiple sealing rings are coaxially arranged and fixedly connected on both the valve stem (21) and the fixed base (24).

4. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 3, characterized in that, The transmission assembly (42) includes a transmission gear ring (421) and a transmission gear (422); the transmission gear ring (421) is rotatably connected to the control chamber (11) and meshes with the drive gear (23); the transmission gear (422) is rotatably connected to the control chamber (11) and meshes with the transmission gear ring (421); the transmission gear (422) meshes with the blocking assembly (41).

5. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 4, characterized in that, The transmission gear ring (421) includes a ring body (4211), horizontal teeth (4212), vertical teeth (4213), and multiple rollers (4214); the ring body (4211) is rotatably connected to the control chamber (11), the horizontal teeth (4212) mesh with the drive gear (23), the vertical teeth (4213) mesh with the transmission gear (422), and the multiple rollers (4214) are arranged in a ring array and rotatably connected to the ring body (4211); a limiting groove (111) is provided in the control chamber (11), and the rollers (4214) roll in the limiting groove (111).

6. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 4, characterized in that, The blocking assembly (41) also includes a cover plate (414); the cover plate (414) is fixedly connected to the control compartment (11), and the partition (413) is slidably connected to the cover plate (414).

7. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 6, characterized in that, The partition (413) includes a traction rod (4131), a partition (4132), and a limiting rod (4133); the traction rod (4131) is slidably connected to the rotator (412), the traction rod (4131) is fixedly connected to one side of the partition (4132), and the limiting rod (4133) is fixedly connected to the other side of the partition (4132); the limiting rod (4133) is slidably connected to the cover plate (414).

8. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 2, characterized in that, It also includes a sealing assembly (5) for sealing the gap between the control chamber (11) and the connecting end (12); the sealing assembly (5) includes a plurality of springs (51) and a sealing ring (52), the plurality of springs (51) are arranged in a ring array in the connecting end (12), one end of the springs (51) abuts against the connecting end (12) and the other end abuts against the sealing ring (52); the sealing ring (52) is slidably connected to the connecting end (12) and abuts against the control chamber (11).

9. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 3, characterized in that, It also includes a valve seat (6), which is detachably connected to the control chamber (11) and abuts against the ball valve (22); the valve seat (6) includes a plurality of springs (61) and a sealing body (62); the plurality of springs (61) are arranged in a ring array in the control chamber (11) and abut against the control chamber (11); one side of the sealing body (62) abuts against the springs (61) and the other side abuts against the ball valve (22).

10. A multi-redundant sealing ball valve for hydrogen pipelines according to claim 2, characterized in that, The switch assembly (3) includes a package (31), a worm gear module (32), and a rotating wheel (33). The package (31) is fixedly connected to the control compartment (11). The worm gear module (32) is disposed inside the package (31). The rotating wheel (33) is fixedly connected to the worm gear module (32). The valve stem (21) is fixedly connected to the worm gear module (32).

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