Hydrogen pressure swing adsorption purification rotary valve with good sealing performance

Abstract

The utility model relates to the technical field of rotary valves, and discloses a hydrogen pressure swing adsorption purification rotary valve with good sealing performance, which comprises a valve body, two airflow ports are arranged on the side wall of the valve body, each airflow port is provided with an end cover, one end cover is provided with a motor, the output end of the motor is connected with a rotating shaft, and the rotating shaft is connected with a rotating shaft. The two ends of the rotating shaft penetrate through the two end covers correspondingly, sealing assemblies are arranged between the rotating shaft and the end covers, and blades are fixedly arranged on the rotating shaft. A first sealing ring is arranged between each end cover and the corresponding airflow opening, each end cover is further provided with a fixing assembly used for being rapidly installed on the valve body, and each fixing assembly comprises a hoop and a locking fastener. According to the utility model, the sealing assembly is arranged to ensure the sealing between the rotating shaft and the end cover; a first sealing ring is arranged to be attached to the end cover, and tight connection between the end cover and the valve body is achieved through cooperation of a hoop and a locking fastener; the quick mounting and dismounting effects are achieved by operating the locking fasteners, and the dismounting efficiency of equipment can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of rotary valve technology, specifically to a rotary valve for hydrogen pressure swing adsorption purification with good sealing performance. Background Technology

[0002] Hydrogen, as a clean, carbon-free, flexible, and efficient new energy source, has broad application prospects in many fields. Pressure swing adsorption (PSA) for hydrogen purification has become one of the main separation technologies for hydrogen production due to its high purity, low energy consumption, and high degree of automation. In the PSA process, the rotary valve is a key component, and its performance directly affects the operating efficiency and stability of the entire system.

[0003] Traditional rotary valves for hydrogen pressure swing adsorption (PSA) purification typically consist of a valve body, valve core, seals, and a drive unit. Their technical principle is based on the differences in adsorption capacity of different gases on a solid adsorbent. By periodically changing the operating pressure, the adsorbent adsorbs a specific component of the gas mixture under pressure and releases that component under pressure, thus achieving gas component separation. The rotary valve precisely controls the gas inlet and outlet channels and flow rate, coordinating with the adsorption and desorption processes of the adsorption tower to purify hydrogen. During operation, the drive unit rotates the valve core within the valve body, sequentially connecting different channels on the valve body to external pipelines, thereby controlling the gas flow between the adsorption tower and other related equipment to complete a series of process steps including adsorption, pressure equalization, desorption, and pressurization.

[0004] Traditional hydrogen pressure swing adsorption (PSA) purification rotary valves use numerous bolts to connect the end cap and valve body. Disassembly and installation require tightening each bolt individually, which is cumbersome and time-consuming. Frequent disassembly and installation can also lead to bolt loosening and decreased sealing performance, thus affecting the stability and safety of the entire system. Therefore, a hydrogen pressure swing adsorption (PSA) purification rotary valve with good sealing performance is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hydrogen pressure swing adsorption purification rotary valve with good sealing performance. It aims to improve the problem that the existing technology uses a lot of bolts to connect the end cap and the valve body. During disassembly and installation, each bolt needs to be tightened one by one, which is cumbersome and time-consuming. Frequent disassembly and installation can also cause bolts to loosen and the sealing performance to decrease, thus affecting the stability and safety of the entire system.

[0006] To achieve the above objectives, this utility model provides a hydrogen pressure swing adsorption purification rotary valve with good sealing performance, comprising a valve body, two airflow ports provided on the side wall of the valve body, each airflow port being provided with an end cap, one of the end caps being provided with a motor, the output end of the motor being connected to a rotating shaft, the two ends of the rotating shaft respectively penetrating the two end caps, a sealing assembly being provided between the rotating shaft and the end caps, and blades being fixedly provided on the rotating shaft; a sealing ring being provided between each end cap and its corresponding airflow port, and each end cap also being provided with a fixing assembly for quick installation with the valve body, the fixing assembly including a clamp sleeved on the end cap and a locking fastener provided on the clamp, the locking fastener being used to tightly connect the clamp to the valve body and the end cap.

[0007] Furthermore, the sealing assembly includes a sealing sleeve fitted on the rotating shaft, and a second sealing ring is provided inside the sealing sleeve. The second sealing ring is slidably connected to the through hole of the end cap. The sealing sleeve is also provided with a plurality of pre-tightening mechanisms for providing a stable pre-tightening force to the second sealing ring.

[0008] Furthermore, the pre-tightening mechanism includes a first pre-tightening unit, which includes an mounting sleeve, a sliding block, and a first spring. The mounting sleeve is fixedly disposed inside the sealing sleeve, the sliding block is slidably disposed inside the mounting sleeve, and the first spring is disposed inside the mounting sleeve. One end of the first spring is fixedly connected to the inner wall of the sealing sleeve, and the other end of the first spring is sleeved on the sliding block and fixedly connected to it.

[0009] Furthermore, the pre-tightening mechanism also includes two second pre-tightening units symmetrically arranged on the left and right sides of the mounting sleeve. Each second pre-tightening unit includes a fixed plate, a fixed rod, a slider, a rotating plate, and a second spring. The fixed plate is fixedly connected to the sealing sleeve, the fixed rod is located on the fixed plate, and one end of the fixed rod is fixedly connected to the fixed plate, while the other end of the fixed rod is fixedly connected to the mounting sleeve. The slider is slidably sleeved on the fixed rod, and the second spring is located between the slider and the mounting sleeve. One end of the rotating plate is rotatably connected to the slider, and the other end of the rotating plate is rotatably connected to the second sealing ring.

[0010] Furthermore, a sealing ring mounting groove is provided on the inner side of the end cap, and the sealing ring is disposed in the sealing ring mounting groove.

[0011] Furthermore, the clamp is formed by two semi-circular unit clamps, one end of the two unit clamps is connected by a hinge, and the other end is connected by the locking fastener.

[0012] Furthermore, the locking fastener includes a mounting plate, a rotating ring, a rotating block, a threaded rotating block, a locking block, and a locking hook. The mounting plate is fixedly mounted on one of the unit clamps. The rotating ring is rotatably connected to the mounting plate. The rotating block is rotatably connected inside the rotating ring. The threaded rotating block is threadedly connected inside the rotating block. One end of the threaded rotating block is fixedly connected to the locking block, and the locking block engages with the locking hook. The locking hook is fixedly mounted on the other unit clamp.

[0013] Furthermore, a nut is threadedly connected to the other end of the threaded swivel block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) In the hydrogen pressure swing adsorption purification rotary valve of this utility model, the end cover and the sealing ring are attached together, and then the end cover and the valve body are connected by the clamp. Then, the buckle distance is adjusted by rotating the threaded rotating block, and then the buckle and the hook are engaged. Then, the rotating ring is rotated to tighten the hook and the buckle to achieve a quick installation and disassembly effect. This solves the problem that some hydrogen pressure swing adsorption purification rotary valves use a lot of bolts to connect the end cover and the valve body. When disassembling and installing, it is necessary to tighten the bolts one by one. The operation is cumbersome and time-consuming. Frequent disassembly and installation will also cause the bolts to loosen and the sealing performance to decrease, which will affect the stability and safety of the entire system. The above structure improves the disassembly efficiency of the equipment.

[0016] (2) In the hydrogen pressure swing adsorption purification rotary valve of this utility model, during the rotation of the rotating shaft driven by the motor, due to the shaking and wear of the rotating shaft, the gap between the rotating shaft and the end cover will increase slightly. By installing a sealing sleeve and a sealing ring II on the rotating shaft, the first spring pushes the sliding block to push the sealing ring II, and the second spring will also push the slider to push the rotating plate to push the sealing ring II, thereby pushing the sealing ring II to further fill the gap and maintain the sealing effect.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of a rotary valve for hydrogen pressure swing adsorption purification with good sealing performance according to this utility model.

[0020] Figure 2 for Figure 1 A schematic diagram of the valve body of the rotary valve for hydrogen pressure swing adsorption purification.

[0021] Figure 3 for Figure 1 A schematic diagram of the blades of the rotary valve for hydrogen pressure swing adsorption purification.

[0022] Figure 4 for Figure 1 A schematic diagram of the sealing sleeve of the rotary valve for hydrogen pressure swing adsorption purification.

[0023] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0025] Wherein, 1-valve body; 1.1-air inlet; 2-motor; 3-sealing ring one; 4-end cover; 4.1-through hole; 5-blade; 6-clamp; 7-mounting plate; 8-rotating ring; 9-rotating block; 10-threaded rotating block; 11-nut; 12-clasp; 13-hook; 14-rotating shaft; 15-sealing sleeve; 16-sealing ring two; 17-mounting sleeve; 18-sliding block; 19-first spring; 20-fixing plate; 21-fixing rod; 22-slider; 23-rotating plate; 24-second spring. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0027] Please see Figure 1 , Figure 2 and Figure 5This embodiment provides a well-sealed rotary valve for hydrogen pressure swing adsorption purification, including a valve body 1. The valve body 1 serves as the main structure of the entire rotary valve, providing a mounting base and housing space for other internal components. Two airflow ports 1.1 are provided on the side wall of the valve body 1. Each airflow port 1.1 is equipped with an end cap 4, one of which is equipped with a motor 2, providing power for the operation of the rotary valve. A sealing ring 3 is provided between each end cap 4 and its corresponding airflow port 1.1, serving a sealing function. The sealing ring 3 is located at the contact point between the valve body 1 and the end cap 4, and through its own elastic deformation, it tightly fits between the valve body 1 and the end cap 4, effectively preventing hydrogen leakage from the connection between the valve body 1 and the end cap 4. The end caps 4 on the airflow ports 1.1 of the valve body 1 protect the internal components of the valve body 1 and, together with the valve body 1, form a sealed cavity, thus constructing a sealing structure together with the sealing ring 3. The output end of motor 2 is connected to a rotating shaft 14, with two end caps 4 passing through both ends of the shaft 14. A sealing assembly is provided between the rotating shaft 14 and the end caps 4. A blade 5 is fixedly connected to the rotating shaft 14. The rotating shaft 14 serves as an intermediate component for power transmission, transmitting the rotational power of motor 2 to the blade 5. Motor 2 drives the blade 5 to rotate, thereby controlling the flow direction and flow rate of hydrogen in the valve. Preferably, a sealing ring mounting groove is provided on the inner side of the end cap 4, and a sealing ring 3 is set in the sealing ring mounting groove, so that the sealing ring 3 can easily cooperate and be positioned with the end cap 4 during installation, and can undergo slight sliding deformation within a certain range under pressure, better filling the sealing gap and further enhancing the sealing effect. Each end cap 4 is also provided with a fixing assembly for quick installation with the valve body 1. The fixing assembly includes a clamp 6 and a locking fastener provided on the clamp 6, which is used to quickly and easily connect the end cap 4 to the valve body 1. Meanwhile, the clamp 6 not only serves to connect the end cover 4 and the valve body 1, but also plays a certain role in restricting and fixing the relative position of the blade 5 and the end cover 4.

[0028] In one specific embodiment, the clamp 6 is formed by two semi-circular unit clamps. One end of the two unit clamps is connected by a hinge, and the other end is connected by a locking fastener. The locking fastener includes a mounting plate 7, a rotating ring 8, a rotating block 9, a threaded rotating block 10, a locking block 12, and a locking hook 13. The mounting plate 7 is fixedly mounted on one of the unit clamps. The rotating ring 8 is rotatably connected to the mounting plate 7. The rotating block 9 is rotatably connected inside the rotating ring 8. The threaded rotating block 10 is threadedly connected inside the rotating block 9. One end of the threaded rotating block 10 is fixedly connected to the locking block 12, which is used to engage with the locking hook 13. The locking hook 13 is fixedly mounted on the other unit clamp. Furthermore, the other end of the threaded rotating block 10 is threadedly connected to a nut 11. In this structural configuration, a mounting plate 7 is fixedly connected to the clamp 6, providing a mounting base for the rotating ring 8. The rotating ring 8 is rotatably connected to the mounting plate 7, and a rotating block 9 is rotatably connected inside the rotating ring 8. A threaded rotating block 10 is threadedly connected inside the rotating block 9. By rotating the rotating block 9, the threaded rotating block 10 can move axially within the rotating block 9, thereby achieving precise adjustment of the position of the latch 12. A nut 11 is threadedly connected to the threaded rotating block 10, locking its position. A latch 12 is fixedly connected to one end of the threaded rotating block 10, engaging with a hook 13 fixedly connected to another unit clamp. After the latch 12 and hook 13 engage, rotating the rotating ring 8 further tightens the hook 13 and latch 12, effectively enhancing the connection and tightness between the clamp 6, the valve body 1, and the end cover 4.

[0029] See Figure 3 , Figure 4 and Figure 6The sealing assembly includes a sealing sleeve 15 fitted onto the rotating shaft 14. The sealing sleeve 15 moves synchronously with the rotation of the rotating shaft 14, preventing the sealing assembly from shifting or falling off during rotation and ensuring the integrity and effectiveness of the sealing structure. A second sealing ring 16 is provided inside the sealing sleeve 15. The second sealing ring 16 is slidably connected to the through hole 4.1 of the end cover 4. During the relative movement of the rotating shaft 14 and the end cover 4, it relies on its own elastic deformation to tightly fit between the sealing sleeve 15 and the end cover 4, forming a reliable sealing barrier, thereby effectively preventing hydrogen leakage from the gap between the rotating shaft 14 and the end cover 4. The sealing sleeve 15 also contains multiple pre-tightening mechanisms to provide a stable pre-tightening force for the second sealing ring 16. The pre-tightening mechanism includes a first pre-tightening unit and a second pre-tightening unit. The first pre-tightening unit includes a mounting sleeve 17, a sliding block 18, and a first spring 19. The mounting sleeve 17 is fixedly disposed inside the sealing sleeve 15, the sliding block 18 is slidably disposed inside the mounting sleeve 17, and the first spring 19 is disposed inside the mounting sleeve 17. One end of the first spring 19 is fixedly connected to the inner wall of the sealing sleeve 15, and the other end of the first spring 19 is sleeved on the sliding block 18 and fixedly connected to it. The first spring 19 provides pre-tightening force to the second sealing ring 16, ensuring that the second sealing ring 16 can tightly fit on the end cap 4 in the initial state, forming an effective seal. The second pre-tightening unit consists of two symmetrically arranged on the left and right sides of the mounting sleeve 17. Each pre-tightening unit includes a fixed plate 20, a fixed rod 21, a slider 22, a rotating plate 23, and a second spring 24. The fixed plate 20 is fixedly connected to the sealing sleeve 15. The fixed rod 21 is located on the fixed plate 20, with one end fixedly connected to the fixed plate 20, providing stable mounting support for the fixed rod 21. The other end of the fixed rod 21 is fixedly connected to the mounting sleeve 17, further enhancing the fixing effect of the mounting sleeve 17 within the sealing sleeve 15. The slider 22 is fitted onto the fixed rod 21, allowing it to slide on the fixed rod 21. One end of the second spring 24 is fixedly connected to the fixed rod 21, and the other end is fixedly connected to the slider 22. The second spring 24 provides elastic restoring force to the slider 22, enabling it to return to its initial position or adaptively adjust within a certain range after being subjected to external force.

[0030] During the rotation of the shaft 14, the resulting wobbling wear is unavoidable. This wobbling wear gradually increases the gap between the shaft 14 and the end cap 4. If left untreated, this will severely compromise the sealing effect, leading to hydrogen leakage. At this point, the increased gap causes the first spring 19 to slowly rebound. Initially, the first spring 19 is compressed, and its elastic force acts on the second sealing ring 16 to maintain the sealing effect. As the gap increases, the external pressure on the first spring 19 decreases, and it slowly rebounds according to its elastic properties. The elastic force is transmitted by pushing the sliding block 18. The sliding block 18, as a key component connecting the first spring 19 and the second sealing ring 16, slides stably along a predetermined track inside the mounting sleeve 17 under the push of the first spring 19, precisely transmitting the rebound force of the first spring 19 to the second sealing ring 16. This provides the necessary power to adjust the position of the second sealing ring 16, allowing it to move in the direction of increased gap, thus responding to the changing gap. Simultaneously, the second spring 24 also rebounds, pushing the slider 22 to slide. The second spring 24 is also compressed in the initial state, and its rebound is an adaptive adjustment mechanism for changes in the gap. When the second spring 24 rebounds, it applies a force to the slider 22, pushing the slider 22 to slide on the fixed rod 21. The sliding direction and stroke of the slider 22 are precisely limited by the fixed rod 21, ensuring the stability and directionality of its movement. One end of the rotating plate 23 is rotatably connected to the slider 22, and the other end of the rotating plate 23 is rotatably connected to the sealing ring 16; the sliding of the slider 22 will cause the rotating plate 23 to rotate. When the slider 22 slides under the push of the second spring 24, the rotating plate 23 rotates around its connection point with the slider 22 and the sealing ring 16. This rotational motion cleverly changes the direction and magnitude of the force transmission, transforming the linear sliding motion of the slider 22 into a lateral thrust on the sealing ring 16, so that the sliding block 18 and the rotating plate 23 jointly push the sealing ring 16, allowing the sealing ring 16 to further fill the gap and maintain the sealing effect. The sliding block 18 applies a thrust in the axial direction, while the rotating plate 23 provides an auxiliary thrust from the side. The two work together to ensure that the sealing ring 16 can fully and evenly fill the increased gap. Under the combined action of these two forces, the elastic deformation of the sealing ring 16 is adjusted, allowing it to better fit between the rotating shaft 14 and the end cover 4. This effectively compensates for gap changes caused by shaking and wear, ensuring that hydrogen does not leak between the rotating shaft 14 and the end cover 4. This maintains the sealing reliability of the equipment during operation and guarantees the continuous and stable operation of hydrogen purification.

[0031] When using this device, sealing ring 3 is first inserted into the end cap 4. Due to its excellent elastic deformation ability, sealing ring 3 fits tightly against the contact interface between the valve body 1 and the end cap 4, filling microscopic gaps and uneven areas to form a reliable static seal. This effectively prevents hydrogen leakage from the connection between the valve body 1 and the end cap 4. Simultaneously, sealing ring 16 slides into the end cap 4, compressing the first spring 19 and the second spring 24. During contact with the end cap 4, sealing ring 16, relying on its material properties and the synergistic effect of the spring force, achieves a dynamic seal between the rotating shaft 14 and the end cap 4. The elastic force generated by the compression of the first spring 19 acts on the sealing ring 16, providing it with a stable axial preload. This ensures that the sealing ring 16 remains tightly pressed against the end cover 4, allowing the rotating shaft 14 to pass through the end cover 4. The clamp 6 then wraps around and secures the side wall of the valve body 1 to the end cover 4. With its unique encircling structure, the clamp 6 applies a uniform clamping force to the valve body 1 and the end cover 4. Compared to traditional bolt connections, this significantly simplifies the installation process and reduces installation time and labor costs. Next, the distance between the threaded rotating block 10 and the hook 13 is adjusted by rotating the threaded rotating block 10. Utilizing the precision of threaded transmission, the threaded rotating block 10 converts rotation into linear displacement, precisely changing the relative position of the buckle 12 and the hook 13, thus achieving fine adjustment of the clamp 6's tightness. This adjustment method can adapt to the requirements of equipment connection tightness under different working conditions, ensuring a tight and stable connection between the clamp 6 and the valve body 1 and end cover 4. This effectively prevents the clamp 6 from loosening due to external forces or prolonged operation, further ensuring the stability and reliability of the overall equipment structure. After adjustment, engage buckle 12 with hook 13, then rotate rotating ring 8 to press buckle 12 tight, thus securing buckle 12 and hook 13 for a fixed effect. The engagement of buckle 12 and hook 13 and the pressing operation of rotating ring 8 greatly enhance the firmness of the clamp 6 connection. After installation, start motor 2 to drive blade 5 to rotate. Driven by rotating shaft 14, blade 5, according to its specific shape, number, and installation angle design, forms precise flow channel changes within valve body 1, accurately controlling the flow rate, direction, and pressure distribution of hydrogen. Thus, according to predetermined process steps and parameter requirements, pressure swing adsorption purification of hydrogen is performed, effectively improving hydrogen purity and meeting the demand for high-purity hydrogen in different industrial applications.

[0032] The working principle of this utility model of a hydrogen pressure swing adsorption purification rotary valve with good sealing performance is as follows: When the device is in operation, the sealing ring 3 is first inserted into the end cover 4 to achieve a sealing effect. At the same time, the sealing ring 16 will also slide into the end cover 4, and the first spring 19 and the second spring 24 will be in a compressed state, so that the rotating shaft 14 passes through the end cover 4 where the motor 2 is located. Then, the clamp 6 is used to wrap and lock the side wall of the valve body 1 and the end cover 4 to achieve a preliminary fixing effect. Next, the distance between the threaded rotating block 10 and the hook 13 is adjusted by rotating the threaded rotating block 10. After the adjustment is completed, the buckle 12 and the hook 13 are engaged. Then, the rotating ring 8 is rotated to press the buckle 12 tightly, so that the buckle 12 and the hook 13 are firmly fixed to achieve a fixing effect. After installation, the motor 2 is started to drive the blade 5 to rotate, thus starting the purification process. During the rotation of the shaft 14, the shaking and wear caused by the rotation will increase the gap between the shaft 14 and the end cover 4. At this time, due to the increased gap, the first spring 19 will slowly rebound, thereby pushing the sliding block 18 to slide. At the same time, the second spring 24 will also rebound, pushing the slider 22 to slide and causing the rotating plate 23 to rotate. Thus, the sliding block 18 and the rotating plate 23 together push the sealing ring 16, so that the sealing ring 16 further fills the gap and maintains the sealing effect.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary valve for hydrogen pressure swing adsorption purification with good sealing performance, comprising a valve body (1), characterized in that, The valve body (1) has two airflow ports (1.1) on its side wall. Each airflow port (1.1) has an end cap (4). One of the end caps (4) has a motor (2). The output end of the motor (2) is connected to a rotating shaft (14). The two ends of the rotating shaft (14) pass through the two end caps (4) respectively. A sealing assembly is provided between the rotating shaft (14) and the end cap (4). A blade (5) is fixedly provided on the rotating shaft (14). A sealing ring (3) is provided between each end cap (4) and its corresponding airflow port (1.1). Each end cap (4) also has a fixing assembly for quick installation with the valve body (1). The fixing assembly includes a clamp (6) sleeved on the end cap (4) and a locking fastener provided on the clamp (6).

2. The hydrogen pressure swing adsorption purification rotary valve according to claim 1, characterized in that, The sealing assembly includes a sealing sleeve (15) sleeved on the rotating shaft (14), and a sealing ring II (16) is provided inside the sealing sleeve (15). The sealing ring II (16) is slidably connected to the through hole (4.1) of the end cap (4). The sealing sleeve (15) is also provided with a plurality of pre-tightening mechanisms for providing stable pre-tightening force to the sealing ring II (16).

3. The hydrogen pressure swing adsorption purification rotary valve according to claim 2, characterized in that, The pre-tightening mechanism includes a first pre-tightening unit, which includes an mounting sleeve (17), a sliding block (18), and a first spring (19). The mounting sleeve (17) is fixedly disposed inside the sealing sleeve (15), the sliding block (18) is slidably disposed inside the mounting sleeve (17), and the first spring (19) is disposed inside the mounting sleeve (17). One end of the first spring (19) is fixedly connected to the inner wall of the sealing sleeve (15), and the other end of the first spring (19) is sleeved on the sliding block (18) and fixedly connected to it.

4. The hydrogen pressure swing adsorption purification rotary valve according to claim 3, characterized in that, The pre-tightening mechanism further includes two second pre-tightening units symmetrically arranged on the left and right sides of the mounting sleeve (17). The second pre-tightening unit includes a fixing plate (20), a fixing rod (21), a slider (22), a rotating plate (23), and a second spring (24). The fixing plate (20) is fixedly connected to the sealing sleeve (15). The fixing rod (21) is located on the fixing plate (20), and one end of the fixing rod (21) is fixedly connected to the fixing plate (20), and the other end of the fixing rod (21) is fixedly connected to the mounting sleeve (17). The slider (22) is slidably sleeved on the fixing rod (21), and the second spring (24) is located between the slider (22) and the mounting sleeve (17). One end of the rotating plate (23) is rotatably connected to the slider (22), and the other end of the rotating plate (23) is rotatably connected to the second sealing ring (16).

5. The hydrogen pressure swing adsorption purification rotary valve according to claim 1, characterized in that, The end cap (4) has a sealing ring mounting groove on its inner side, and the sealing ring (3) is installed in the sealing ring mounting groove.

6. The hydrogen pressure swing adsorption purification rotary valve according to claim 1, characterized in that, The clamp (6) is formed by two semi-circular unit clamps. One end of the two unit clamps is connected by a hinge and the other end is connected by the locking fastener.

7. The hydrogen pressure swing adsorption purification rotary valve according to claim 6, characterized in that, The locking fastener includes a mounting plate (7), a rotating ring (8), a rotating block (9), a threaded rotating block (10), a locking block (12), and a locking hook (13). The mounting plate (7) is fixedly mounted on one of the unit clamps. The rotating ring (8) is rotatably connected to the mounting plate (7). The rotating block (9) is rotatably connected inside the rotating ring (8). The threaded rotating block (10) is threadedly connected inside the rotating block (9). One end of the threaded rotating block (10) is fixedly connected to the locking block (12). The locking block (12) engages with the locking hook (13). The locking hook (13) is fixedly mounted on the other unit clamp.

8. The hydrogen pressure swing adsorption purification rotary valve according to claim 7, characterized in that, The other end of the threaded swivel block (10) is threaded with a nut (11).

Images