Processing method and apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines

Abstract

This invention discloses a processing method and apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines. The apparatus includes a side support frame, a horizontal plate fixed to one outer wall of the side support frame, and a screw adjustment module at the top of the horizontal plate. A right-angle shaft is mounted on the moving end of the screw adjustment module, and a secondary shaft is rotatably mounted on the top of the right-angle shaft. A polishing disc is fixed to the end of the secondary shaft away from the side support frame. The screw adjustment module controls the left and right movement of the right-angle shaft, secondary shaft, and polishing disc in the X-axis direction. This invention employs a driven dual-station rotary structure for synchronous polishing, allowing simultaneous polishing of the disc surfaces and inner walls of two flange joints within the same time period. Through reasonable equipment configuration and synchronous operation, it significantly improves work efficiency and shortens the overall processing cycle. It not only increases the output per processing cycle but also reduces the time spent handling and changing workpieces between processes, thereby effectively reducing the production cycle.

Description

Technical Field

[0001] This invention relates to the field of flange joint processing equipment technology, specifically to a processing method and apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines. Background Technology

[0002] In the manufacturing process of ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines, drilling, polishing, and cleaning are three crucial steps. Drilling ensures precise flange connection, especially under high pressure, where the accuracy of hole position and diameter directly affects sealing and connection stability. Using drilling machines, fixtures, and guiding devices, drilling effectively avoids hole position deviations, improves hole smoothness, and ensures subsequent bolt connections and sealing performance. Polishing primarily removes the surface roughness layer through the combined action of abrasives and mechanical force, improving the smoothness of the flange joint's inner and outer surfaces, reducing cracks and defects, thereby improving sealing and preventing high-pressure hydrogen leakage. Polishing equipment includes a polishing machine, polishing wheels, and polishing compound, ensuring the workpiece surface is smoothed through friction. Cleaning is a key step in ensuring the flange joint is free of impurities, oil, and chip residue. It removes contaminants generated during manufacturing using cleaning fluid and a high-pressure spray system, ensuring the flange joint's cleanliness and sealing during installation.

[0003] For example, the polishing device and process for finishing flange mating surfaces disclosed in application publication number CN118357835A include a base frame and a flat worktable. The flat worktable is fixedly installed on the base frame. A polishing belt is provided on the outside of the flat worktable. A support arm is fixedly installed on one side of the flat worktable. A rotary drive motor is provided above the polishing belt. A lifting control cylinder is fixedly installed on the surface of the rotary drive motor. The rotary drive motor is lifted and lowered by the lifting control cylinder and the support arm. It drives the flange to rotate actively through the rotation of the polishing belt and the split clamping block, so that the flange mating surface is polished evenly. The current flange polishing technology and equipment have a higher degree of precision and processing accuracy. The existing flange polishing technology and equipment operation methods are basically the same, that is, to use friction to grind the surface of the workpiece. However, in the process, the flange plate surface that contacts the pipe is still polished, while the inner wall surface of the flange plate is not treated. That is, after the flange plate surface is polished, the inner wall surface must be polished separately. This process often requires disassembly and re-fixing of the workpiece, which not only wastes manpower and equipment time, but may also cause damage to the workpiece or precision deviation during handling. Moreover, each step requires additional equipment and operators, which increases production costs and time and reduces production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a processing method and apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines. The method involves a driven dual-station rotary structure clamping two ultra-high pressure, high-barrier flange joints to be polished, including both the disc surface and the inner wall surface. A lead screw adjustment module moves the secondary shaft and polishing disc closer to one of the flange joints until the polishing disc surface contacts the flange joint surface. Subsequently, a second servo pulley drive unit rotates the main shaft, secondary shaft, polishing disc, and driven dual-station rotary structure. At this time, the two flange joints to be polished rotate, and the polishing disc polishes the disc surface of one flange joint. Simultaneously, a connecting rod reciprocating push module receives power from the second servo pulley drive unit, causing the external thread grinding head to move inside the other flange joint to polish its inner wall surface, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a processing method for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines, comprising the following steps:

[0006] S101: Check the clamping function of the driven double-station rotary structure, remove the two ultra-high pressure high-barrier flange joints of the pipeline, and ensure that the two ultra-high pressure high-barrier flange joints of the pipeline to be polished are firmly fixed by the driven double-station rotary structure to avoid loosening during processing. Next, check the first servo pulley drive unit and ensure that the sub-shaft and polishing disc are adjusted to the appropriate position during processing to adapt to flange joints of different sizes. Then check the movement status of the sub-shaft, polishing disc and hollow spindle to ensure that each axis runs smoothly without abnormal vibration or jamming.

[0007] S102: Place the flange joint into the driven double-station rotary structure for fixation. During this process, the clamping force and clamping angle need to be adjusted according to the size of the flange joint to ensure uniform clamping force and prevent deformation of the flange joint. Then, the operator adjusts the position of the right-angle shaft, the auxiliary shaft, and the polishing disc through the screw adjustment module until the polishing surface of the polishing disc contacts the flange joint disc on the right. At the same time, select an external thread grinding head with the same inner diameter as the flange joint disc on the left to facilitate friction between the external thread grinding head and the inner wall surface of the flange joint disc when the connecting rod reciprocating push module drives the external thread grinding head.

[0008] S103: The second servo pulley drive unit is activated. The rotational power of the second servo pulley drive unit is transmitted to the hollow spindle, which drives the auxiliary shaft and polishing disc to rotate. During this process, the polishing disc will contact the disc surface of the flange joint and perform polishing. The hollow spindle drives the driven double-station rotary structure through the synchronous belt drive structure. The driven double-station rotary structure causes the flange joints on its left and right sides to rotate. During this process, part of the rotational power of the hollow spindle is also transmitted to the connecting rod reciprocating push module. The connecting rod reciprocating push module forces the external thread grinding head to move back and forth in the direction of the extension of the central axis of the left flange joint. Then, the contact between the external thread grinding head and the inner wall surface of the left flange joint is achieved, and the inner wall surface of the flange joint is finely ground.

[0009] S104: During the polishing process, staff continuously monitor parameter changes and make immediate adjustments if any abnormalities are detected.

[0010] S105: After polishing, the staff first visually inspects the surface quality of the flange joint to confirm whether the polishing effect meets the predetermined requirements. At the same time, the staff uses precision instruments to measure the smoothness and flatness of the flange joint to ensure that the quality of the polishing process meets the technical standards. After meeting the quality standards, the polished flange joint is taken out from the driven double-station rotary structure for subsequent cleaning, inspection or assembly.

[0011] This invention also provides a processing apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines, and a processing method for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines as described above, comprising:

[0012] A side support frame has a horizontal plate fixed on one outer wall. A lead screw adjustment module is provided at the top of the horizontal plate, and a right-angle shaft is installed at the moving end of the lead screw adjustment module. A secondary shaft is rotatably installed at the top of the right-angle shaft. A polishing disc is fixed at the end of the secondary shaft away from the side support frame. The lead screw adjustment module is used to control the right-angle shaft, secondary shaft, and polishing disc to move left and right in the X-axis direction. A driven double-station rotary structure for simultaneously clamping two flange joints of the same specification is installed at the top of the horizontal plate.

[0013] A support frame is fixed to the top of a side support frame. A hollow main shaft is rotatably mounted on the outer wall of the side support frame near the horizontal plate. One end of the auxiliary shaft extends into the interior of the hollow main shaft and is provided with a keyway structure that rotates together with the hollow main shaft. A synchronous belt drive structure for maintaining power connection is installed between the hollow main shaft and the driven dual-station rotary structure. A second servo pulley drive unit for driving the rotation of the hollow main shaft is installed on the outer wall of one side of the side support frame.

[0014] A reciprocating push-moving module for connecting rods is located at the top of the support frame, and the moving end of the reciprocating push-moving module for connecting rods is equipped with an external thread grinding head that is concentric with the left flange joint.

[0015] Preferably, the driven dual-station rotary structure includes an inverted U-shaped frame fixed to the top of the horizontal plate, two symmetrical bearing seats fixed to the top of the inverted U-shaped frame, and a drive shaft rotatably mounted between the two bearing seats. Both ends of the drive shaft extend through the outside of the inverted U-shaped frame and are fixed with four-jaw chucks, which are used to clamp flange joints.

[0016] Preferably, a vertical shell is fixed to one side of the top of the horizontal plate, and an upper decorative plate is fixed to the top of the vertical shell. The interior of the upper decorative plate is provided with a hollow groove for the right-angle bracket to slide. The bottom end of the inverted U-shaped bracket is fixedly connected to the top of the upper decorative plate, and the end of the upper decorative plate away from the vertical shell is fixedly connected to the outer wall of one side of the side support frame.

[0017] Preferably, the lead screw adjustment module includes a threaded shaft rotatably mounted on the top of the horizontal plate and a nut assembly installed at the threaded end of one end of the threaded shaft surface. The top end of the nut assembly is fixedly connected to the bottom end of the right-angle shaft bracket, and a limit switch for detecting the X-axis position of the right-angle shaft bracket is installed on one side of the top of the horizontal plate.

[0018] Preferably, the lead screw pitch adjustment module further includes a first servo pulley drive unit installed on the outer wall of one side of the side support frame, the first servo pulley drive unit being used to drive the threaded shaft to rotate.

[0019] Preferably, the keyway structure includes a straight slot on the outer circumferential surface of the hollow main shaft and a key fixed to one side of the top end of the secondary shaft. The end of the key extends into the straight slot. The hollow main shaft and the secondary shaft are located above the upper decorative plate, and the vertical center reference plane of the hollow main shaft and the secondary shaft coincides with the vertical center reference plane of the upper decorative plate.

[0020] Preferably, each of the top corners of the upper decorative panel is fixed with an upwardly extending support rod, and the top of one of the support rods is fixedly connected to the top wall of the support frame.

[0021] Preferably, the connecting rod reciprocating pushing module includes a vertical shaft rotatably mounted on one side of the top of the support frame, a disc fixed at the top of the vertical shaft, and a lower sliding plate slidably mounted on one side of the top of the support frame. A fisheye connecting rod is hinged to one side of the top of the lower sliding plate, and one end of the fisheye connecting rod is hinged to the edge of the top of the disc. A bevel gear is installed at the bottom of the vertical shaft and one end of the hollow main shaft. The two bevel gears mesh with each other. A height adjustment structure for connecting to one end of the external thread grinding head is installed at the top of the lower sliding plate.

[0022] Preferably, the height adjustment structure includes columns fixed on both sides of the top of the lower slide plate and an upper connecting plate bolted between the two columns. The bottom end of the upper connecting plate is fixed with a vertical plate, and the end of the external thread grinding head away from the driven dual-station rotary structure is threadedly engaged with the outer wall of one side of the vertical plate.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The processing method and device for ultra-high pressure and high barrier flange joints for hydrogen transportation pipelines adopts a driven double-station rotary structure to clamp two ultra-high pressure and high barrier flange joints to be polished on the disc surface and inner wall surface. The auxiliary shaft and polishing disc are brought closer to one of the flange joints by the lead screw adjustment module until the polishing disc surface contacts the flange joint surface. Then, the second servo pulley drive unit drives the main shaft, auxiliary shaft, polishing disc and driven double-station rotary structure to rotate. At the same time, the two flange joints to be polished rotate. The polishing disc polishes the disc surface of one of the flange joints. The connecting rod reciprocating push module receives power from the second servo pulley drive unit, so that the external thread grinding head polishes the inner wall surface of the other flange joint.

[0025] The simultaneous polishing using a driven dual-station rotary structure allows for the simultaneous polishing of the disc surfaces and inner walls of two flange joints within the same time period. Through optimized equipment configuration and synchronized operation, work efficiency is significantly improved, and the overall processing cycle is shortened. This not only increases the output per processing run but also reduces the time spent handling and changing workpieces between processes, effectively reducing the production cycle. Furthermore, the dual-station rotary structure and synchronized operation ensure that the polishing processes on both sides are carried out in the same working environment, reducing the accumulation of errors between different processes. Since the inner wall and disc surfaces can be precisely polished simultaneously, the consistency of flange joint precision is greatly improved, ensuring consistent smoothness and gloss on both contact surfaces, thus effectively enhancing the surface smoothness performance of the flange joints. Traditional processing methods require multiple processing runs and frequent equipment switching, necessitating more equipment investment and manual labor. With the dual-station rotary structure, only a single machine is needed to simultaneously complete the polishing of the disc surface and inner wall surface, significantly reducing the number of machines and labor input, while also lowering production costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0028] Figure 3This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0029] Figure 4 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0030] Figure 5 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 6 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0032] Figure 7 This is a three-dimensional structural diagram of the lead screw pitch adjustment structure according to Embodiment 2 of the present invention;

[0033] Figure 8 This is a three-dimensional structural diagram of the connecting rod reciprocating pushing module according to Embodiment 3 of the present invention.

[0034] In the diagram: 1. Side support frame; 2. Horizontal plate; 201. Upper decorative panel; 202. Hollowed-out groove; 203. Vertical shell; 3. Screw adjustment module; 301. Threaded shaft; 302. Nut pair; 303. Limit switch; 4. First servo pulley drive unit; 5. Support frame; 6. Hollow spindle; 601. Straight slot; 7. Driven double-station rotary structure; 701. Inverted U-shaped frame; 702. Drive shaft; 703. Four-jaw clamp. 8. Disc; 9. Right-angle shaft bracket; 10. Sub-shaft; 11. Shaft key; 12. Polishing disc; 13. Connecting rod reciprocating push module; 14. Lower slide plate; 15. Fisheye connecting rod; 16. Column; 17. Upper connecting plate; 18. Vertical plate; 19. Bevel gear; 10. Vertical shaft; 1102. Disc; 12. External thread grinding head; 13. Second servo pulley drive unit; 14. Synchronous belt drive structure. Detailed Implementation

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Example 1, by Figures 1 to 5 The present invention includes a side support frame 1, a horizontal plate 2 fixed on one outer wall of the side support frame 1, and a screw adjustment module 3 provided at the top of the horizontal plate 2. A right-angle shaft bracket 8 is installed at the moving end of the screw adjustment module 3. A secondary shaft 9 is rotatably installed at the top of the right-angle shaft bracket 8. A polishing disc 10 is fixed at the end of the secondary shaft 9 away from the side support frame 1. The screw adjustment module 3 is used to control the right-angle shaft bracket 8, the secondary shaft 9, and the polishing disc 10 to move left and right in the X-axis direction. A driven double-station rotary structure 7 for simultaneously clamping two flange joints of the same specification is installed at the top of the horizontal plate 2.

[0037] Support frame 5 is fixed to the top of side support frame 1. A hollow main shaft 6 is rotatably mounted on the outer wall of the side support frame 1 near the horizontal plate 2. One end of the auxiliary shaft 9 extends into the interior of the hollow main shaft 6 and is provided with a keyway structure that keeps rotating with the hollow main shaft 6. A synchronous belt drive structure 14 for maintaining power connection is installed between the hollow main shaft 6 and the driven double-station rotary structure 7. A second servo pulley drive unit 13 for driving the hollow main shaft 6 to rotate is installed on the outer wall of one side of the side support frame 1.

[0038] The connecting rod reciprocating push module 11 is located at the top of the support frame 5, and the moving end of the connecting rod reciprocating push module 11 is equipped with an external thread grinding head 12 that is concentric with the left flange joint.

[0039] The processing method for the ultra-high pressure, high-barrier flange joint of hydrogen transportation pipelines in this embodiment, as described in the above-mentioned processing apparatus for the ultra-high pressure, high-barrier flange joint of hydrogen transportation pipelines, includes the following steps:

[0040] S101: Check the clamping function of the driven double-station rotary structure 7, remove the two pipe ultra-high pressure high barrier flange joints, and ensure that the two pipe ultra-high pressure high barrier flange joints to be polished are firmly fixed by the driven double-station rotary structure 7 to avoid loosening during processing. Next, check the first servo pulley drive unit 4 and ensure that the sub-shaft 9 and polishing disc 10 are adjusted to the appropriate position during processing to adapt to flange joints of different sizes. Then check the movement status of the sub-shaft 9, polishing disc 10 and hollow spindle 6 to ensure that each axis runs smoothly without abnormal vibration or jamming.

[0041] S102: Place the flange joint into the driven double-station rotary structure 7 for fixation. During this process, the clamping force and clamping angle need to be adjusted according to the size of the flange joint to ensure uniform clamping force and prevent deformation of the flange joint. Then, the operator adjusts the position of the right-angle shaft 8, the auxiliary shaft 9, and the polishing disc 10 through the screw adjustment module 3 until the grinding surface of the polishing disc 10 contacts the flange joint disc on the right. At the same time, select an external thread grinding head 12 with the same inner diameter as the flange joint disc on the left to facilitate friction between the external thread grinding head 12 and the inner wall surface of the flange joint disc when the connecting rod reciprocating push module 11 drives the external thread grinding head 12.

[0042] S103: The second servo pulley drive unit 13 is activated and put into operation. The rotational power of the second servo pulley drive unit 13 is transmitted to the hollow spindle 6. The hollow spindle 6 drives the auxiliary shaft 9 and the polishing disc 10 to rotate. During this process, the polishing disc 10 will contact the disc surface of the flange joint and perform polishing. The hollow spindle 6 drives the driven double-station rotary structure 7 to work through the synchronous belt drive structure 14. The driven double-station rotary structure 7 causes the flange joints on its left and right sides to rotate. During this process, part of the rotational power of the hollow spindle 6 will also be transmitted to the connecting rod reciprocating push module 11. The connecting rod reciprocating push module 11 forces the external thread grinding head 12 to move back and forth in the direction of the extension of the central axis of the left flange joint. Then the contact between the external thread grinding head 12 and the inner wall surface of the left flange joint is used to finely grind the inner wall surface of the flange joint.

[0043] S104: During the polishing process, staff continuously monitor parameter changes and make immediate adjustments if any abnormalities are detected.

[0044] S105: After polishing, the staff first visually inspects the surface quality of the flange joint to confirm whether the polishing effect meets the predetermined requirements. At the same time, the staff uses precision instruments to measure the smoothness and flatness of the flange joint to ensure that the quality of the polishing process meets the technical standards. After meeting the quality standards, the polished flange joint is taken out from the driven double-station rotary structure 7 for subsequent cleaning, inspection or assembly.

[0045] Example 2, based on Example 1, is... Figure 6 and Figure 7 The driven double-station rotary structure 7 includes an inverted U-shaped frame 701 fixed to the top of the horizontal plate 2, two symmetrical bearing seats fixed to the top of the inverted U-shaped frame 701, and a drive shaft 702 rotatably mounted between the two bearing seats. Both ends of the drive shaft 702 extend to the outside of the inverted U-shaped frame 701 and are fixed with a four-jaw chuck 703. The four-jaw chuck 703 is used to clamp the flange joint.

[0046] The workers place the flange joint to be processed on the left and right sides of the inverted U-shaped frame 701 and firmly fix it with the four-jaw chuck 703. The four-jaw chuck 703 has higher clamping accuracy and stronger adaptability. It can be precisely adjusted according to the different sizes and shapes of the flange joint, reducing the displacement or deformation of the flange joint during processing and ensuring a more uniform and fine polishing effect.

[0047] When the second servo pulley drive unit 13 drives the hollow spindle 6 and the sub-spindle 9 to rotate, the hollow spindle 6 drives the drive shaft 702, the four-jaw chuck 703 and the clamped flange joint to rotate through the synchronous belt drive structure 14. At this time, the clamping and rotation of each flange joint during the processing can be synchronized, and it can make stable contact with the polishing disc 10 and the external thread grinding head 12.

[0048] A vertical shell 203 is fixed to one side of the top of the horizontal plate 2, and an upper decorative plate 201 is fixed to the top of the vertical shell 203. The interior of the upper decorative plate 201 is provided with a hollow groove 202 for the right-angle shaft frame 8 to slide. The bottom end of the inverted U-shaped frame 701 is fixedly connected to the top of the upper decorative plate 201. The end of the upper decorative plate 201 away from the vertical shell 203 is fixedly connected to the outer wall of one side of the side support frame 1. An upwardly extending support rod is fixed at the corner of the top of the upper decorative plate 201, and the top of one of the support rods is fixedly connected to the top wall of the support frame 5. When the right-angle shaft frame 8 is driven to slide by the lead screw adjustment module 3, the hollow groove 202 serves as a sliding guide for the right-angle shaft frame 8, and the upper decorative plate 201 plays a certain role in dust prevention and chip protection.

[0049] The lead screw adjustment module 3 includes a threaded shaft 301 rotatably mounted on the top of the horizontal plate 2 and a nut pair 302 installed at the threaded end of one end of the surface of the threaded shaft 301. The top end of the nut pair 302 is fixedly connected to the bottom end of the right-angle shaft bracket 8. A limit switch 303 for detecting the X-axis position of the right-angle shaft bracket 8 is installed on one side of the top of the horizontal plate 2. The lead screw adjustment module 3 also includes a first servo pulley drive unit 4 installed on the outer wall of one side of the side support frame 1. The first servo pulley drive unit 4 is used to drive the threaded shaft 301 to rotate.

[0050] The keyway structure includes a straight slot 601 on the outer circumferential surface of the hollow main shaft 6 and a key 901 fixed on one side of the top end of the secondary shaft 9. The end of the key 901 extends into the straight slot 601. The hollow main shaft 6 and the secondary shaft 9 are located above the upper decorative plate 201, and the vertical center reference planes of the hollow main shaft 6 and the secondary shaft 9 coincide with the vertical center reference plane of the upper decorative plate 201.

[0051] The operator controls the first servo pulley drive unit 4 to work. The first servo pulley drive unit 4 drives the screw adjustment module 3 to move the right-angle shaft 8, polishing disc 10, and sub-shaft 9 along the X-axis until the polishing surface of the polishing disc 10 contacts the disc surface of the right flange joint. During this process, the rotational power of the first servo pulley drive unit 4 is transmitted to the threaded shaft 301. The threaded shaft 301 and the nut pair 302 drive the right-angle shaft 8, sub-shaft 9, and polishing disc 10 to move. The limit switch 303 detects the sliding position of the right-angle shaft 8. At this time, the flexible adjustment function of the screw adjustment module 3 and the first servo pulley drive unit 4 allows the polishing disc 10 to quickly adapt to workpieces of different sizes. When polishing the flange joint, the position of the polishing disc can be changed by simple operation, avoiding frequent changes of tools or equipment and improving the flexibility of production.

[0052] The second servo pulley drive unit 13 drives the hollow spindle 6, the sub-spindle 9, the driven dual-station rotary structure 7, and the connecting rod reciprocating push module 11 to work. The rotational speeds of each axis are proportional and are all controlled by the second servo pulley drive unit 13 to ensure the stability and consistency of the machining process.

[0053] Example 3, based on Example 2, by Figure 8 The connecting rod reciprocating push module 11 includes a vertical shaft 1107 rotatably mounted on one side of the top of the support frame 5, a disc 1108 fixed at the top of the vertical shaft 1107, and a lower slide plate 1101 slidably mounted on one side of the top of the support frame 5. A fisheye connecting rod 1102 is hinged to one side of the top of the lower slide plate 1101. One end of the fisheye connecting rod 1102 is hinged to the edge of the top of the disc 1108. A bevel gear 1106 is installed at the bottom of the vertical shaft 1107 and one end of the hollow main shaft 6. The two bevel gears 1106 mesh with each other. A height adjustment structure for connecting to one end of the external thread grinding head 12 is installed at the top of the lower slide plate 1101.

[0054] The height adjustment structure includes columns 1103 fixed on both sides of the top of the lower slide plate 1101 and an upper connecting plate 1104 bolted between the two columns 1103. The bottom end of the upper connecting plate 1104 is fixed with a vertical plate 1105. The end of the external thread grinding head 12 away from the driven double-station rotary structure 7 is threaded with the outer wall of one side of the vertical plate 1105. The height adjustment structure makes the external thread grinding head 12 collinear with the central axis of one of the flange joints.

[0055] When the hollow spindle 6 is driven to rotate by the second servo pulley drive unit 13, the hollow spindle 6 and the vertical shaft 1107 transmit power to each other through the bevel gear 1106. The vertical shaft 1107 drives the lower slide plate 1101, the vertical plate 1105, and the external thread grinding head 12 to reciprocate in the direction of the central axis of the left flange joint through the disc 1108 and the fisheye connecting rod 1102. During this process, the left flange joint is also rotating. The reciprocating motion characteristic makes the external thread grinding head 12 evenly distribute pressure and grinding force on the inner wall surface of the left flange joint, avoiding the uneven local grinding caused by unidirectional rotation grinding, thereby ensuring that the smoothness and surface quality of the inner wall of the flange joint reach a higher standard and reducing surface defects.

[0056] Workers can also install a polishing fluid spray structure in the polishing area of ​​the two flange joints to make polishing smoother.

[0057] In this embodiment, the clamping function of the driven double-station rotary structure 7 is first checked. Two ultra-high pressure high-barrier flange joints are removed to ensure that they are firmly fixed by the driven double-station rotary structure 7 to prevent loosening during processing. Next, the first servo pulley drive unit 4 is checked to ensure that the sub-shaft 9 and polishing disc 10 are adjusted to appropriate positions during processing to accommodate flange joints of different sizes. Then, the movement status of the sub-shaft 9, polishing disc 10, and hollow spindle 6 is checked to ensure that each shaft runs smoothly without abnormal vibration or jamming. After confirming that the device is normal, the flange joint is placed on the driven double-station rotary structure 7 for fixing. During this process, the clamping force and clamping angle need to be adjusted according to the size of the flange joint to ensure uniform clamping force and prevent deformation of the flange joint.

[0058] Subsequently, the staff adjusted the positions of the right-angle shaft bracket 8, the secondary shaft 9, and the polishing disc 10 using the lead screw adjustment module 3 until the polishing surface of the polishing disc 10 was in contact with the flange joint disc on the right. At the same time, an external thread grinding head 12 with the same inner diameter as the flange joint disc on the left was selected so that when the connecting rod reciprocating push module 11 drives the external thread grinding head 12, the external thread grinding head 12 will rub against the inner wall surface of the flange joint disc on the left.

[0059] The operator starts the second servo pulley drive unit 13 to start work. The rotational power of the second servo pulley drive unit 13 is transmitted to the hollow spindle 6. The hollow spindle 6 drives the auxiliary shaft 9 and the polishing disc 10 to rotate. During this process, the polishing disc 10 will contact the disc surface of the flange joint to perform efficient polishing. At the same time, the hollow spindle 6 drives the driven double-station rotary structure 7 to work through the synchronous belt drive structure 14. The driven double-station rotary structure 7 causes the flange joints on its left and right sides to rotate, so as to further improve the polishing time and shorten the polishing process time.

[0060] Part of the rotational power of the hollow spindle 6 is also transmitted to the connecting rod reciprocating push module 11. The connecting rod reciprocating push module 11 forces the external thread grinding head 12 to move back and forth along the extension of the central axis of the left flange joint. The contact between the external thread grinding head 12 and the inner wall surface of the left flange joint finely grinds the inner wall surface of the flange joint, thereby achieving a finer polishing effect. During the polishing operation, the operator needs to continuously monitor the parameter changes during the processing. If any abnormality is found, such as excessive temperature or excessive pressure, the operator should make adjustments immediately to avoid overloading the device or damaging the workpiece.

[0061] After polishing is completed, the staff first visually inspects the surface quality of the flange joint to confirm whether the polishing effect meets the predetermined requirements. At the same time, the staff uses precision instruments to measure the smoothness and flatness of the flange joint to ensure that the quality of the polishing process meets the technical standards. After confirming that the polishing work is completed and meets the quality standards, the polished flange joint is taken out from the driven double-station rotary structure 7 for subsequent cleaning, inspection or assembly.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines, characterized in that, include: A side support frame (1) is provided with a horizontal plate (2) fixed on one side of the outer wall of the side support frame (1). A screw adjustment module (3) is provided at the top of the horizontal plate (2). A right-angle shaft frame (8) is installed at the moving end of the screw adjustment module (3). A secondary shaft (9) is installed at the top of the right-angle shaft frame (8) by rotation. A polishing disc (10) is fixed at the end of the secondary shaft (9) away from the side support frame (1). The screw adjustment module (3) is used to control the right-angle shaft frame (8), the secondary shaft (9), and the polishing disc (10) to move left and right in the X-axis direction. A driven double-station rotary structure (7) for simultaneously clamping two flange joints of the same specification is installed at the top of the horizontal plate (2). A support frame (5) is fixed to the top of a side support frame (1). A hollow main shaft (6) is rotatably mounted on the outer wall of the side support frame (1) near the horizontal plate (2). One end of the auxiliary shaft (9) extends into the interior of the hollow main shaft (6) and is provided with a keyway structure that rotates together with the hollow main shaft (6). A synchronous belt drive structure (14) for maintaining power connection is installed between the hollow main shaft (6) and the driven double-station rotary structure (7). A second servo pulley drive unit (13) for driving the hollow main shaft (6) to rotate is installed on the outer wall of one side of the side support frame (1). The connecting rod reciprocating push module (11) is set at the top of the support frame (5), and the moving end of the connecting rod reciprocating push module (11) is equipped with an external thread grinding head (12) concentric with the left flange joint. The grinding surface of the polishing disc (10) is opposite to the disc surface of the right flange joint. The driven double-station rotary structure (7) includes an inverted U-shaped frame (701) fixed at the top of the horizontal plate (2), two symmetrical bearing seats fixed at the top of the inverted U-shaped frame (701), and a drive shaft (702) rotatably installed between the two bearing seats. Both ends of the drive shaft (702) extend to the outside of the inverted U-shaped frame (701) and are fixed with a four-jaw chuck (703). The four-jaw chuck (703) is used to clamp the flange joint. The connecting rod reciprocating push module (11) includes a vertical shaft (1107) rotatably mounted on one side of the top of the support frame (5). Both the bottom end of the vertical shaft (1107) and one end of the hollow main shaft (6) are equipped with bevel gears (1106), and the two bevel gears (1106) mesh with each other.

2. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 1, characterized in that: A vertical shell (203) is fixed to one side of the top of the horizontal plate (2), and an upper decorative plate (201) is fixed to the top of the vertical shell (203). The interior of the upper decorative plate (201) is provided with a hollow groove (202) for sliding of the right-angle shaft frame (8). The bottom end of the inverted U-shaped frame (701) is fixedly connected to the top of the upper decorative plate (201). The end of the upper decorative plate (201) away from the vertical shell (203) is fixedly connected to the outer wall of one side of the side support frame (1).

3. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 2, characterized in that: The lead screw adjustment module (3) includes a threaded shaft (301) rotatably mounted on the top of the horizontal plate (2) and a nut pair (302) installed at the threaded end of one end of the surface of the threaded shaft (301). The top of the nut pair (302) is fixedly connected to the bottom of the right-angle shaft bracket (8). A limit switch (303) for detecting the X-axis position of the right-angle shaft bracket (8) is installed on one side of the top of the horizontal plate (2).

4. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 3, characterized in that: The lead screw pitch adjustment module (3) also includes a first servo pulley drive unit (4) installed on the outer wall of one side of the side support frame (1), which is used to drive the threaded shaft (301) to rotate.

5. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 4, characterized in that: The keyway structure includes a straight slot (601) on the outer circumferential surface of the hollow main shaft (6) and a key (901) fixed on one side of the top of the secondary shaft (9). The end of the key (901) extends into the straight slot (601). The hollow main shaft (6) and the secondary shaft (9) are located above the upper decorative plate (201), and the vertical center reference planes of the hollow main shaft (6) and the secondary shaft (9) coincide with the vertical center reference plane of the upper decorative plate (201).

6. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 5, characterized in that: Each of the top corners of the upper decorative panel (201) is fixed with an upwardly extending support rod, and the top of one of the support rods is fixedly connected to the top wall of the support frame (5).

7. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 6, characterized in that: The connecting rod reciprocating push module (11) also includes a disc (1108) fixed at the top of the vertical shaft (1107) and a sliding plate (1101) slidably mounted on one side of the top of the support frame (5). A fisheye connecting rod (1102) is hinged to one side of the top of the sliding plate (1101). One end of the fisheye connecting rod (1102) is hinged to the edge of the top of the disc (1108). The top of the sliding plate (1101) is equipped with a height adjustment structure for connecting to one end of the external thread grinding head (12).

8. The processing device for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines according to claim 7, characterized in that: The height adjustment structure includes columns (1103) fixed on both sides of the top of the lower slide plate (1101) and an upper connecting plate (1104) bolted between the two columns (1103). The bottom end of the upper connecting plate (1104) is fixed with a vertical plate (1105). The end of the external thread grinding head (12) away from the driven double-station rotary structure (7) is threaded with the outer wall of one side of the vertical plate (1105).

9. A method for processing an ultra-high pressure, high-barrier flange joint for hydrogen transportation pipelines, characterized in that: The method uses the processing apparatus for ultra-high pressure, high-barrier flange joints for hydrogen transportation pipelines as described in any one of claims 4 to 8, and the method includes the following steps: S101: Check the clamping function of the driven double-station rotary structure (7), remove the two pipe ultra-high pressure high barrier flange joints, and ensure that the two pipe ultra-high pressure high barrier flange joints to be polished are firmly fixed by the driven double-station rotary structure (7) to avoid loosening during processing. Next, check the first servo pulley drive unit (4) and ensure that the sub-shaft (9) and polishing disc (10) are adjusted to the appropriate position during processing to adapt to flange joints of different sizes. Then check the movement status of the sub-shaft (9), polishing disc (10) and hollow spindle (6) to ensure that each shaft runs smoothly and without abnormal vibration or jamming. S102: Place the flange joint into the driven double-station rotary structure (7) for fixing. During this process, the clamping force and clamping angle need to be adjusted according to the size of the flange joint to ensure uniform clamping force and prevent deformation of the flange joint. Then, the staff adjusts the position of the right-angle shaft frame (8), the auxiliary shaft (9), and the polishing disc (10) through the screw adjustment module (3) until the polishing surface of the polishing disc (10) contacts the flange joint disc on the right. At the same time, select an external thread grinding head (12) with the same inner diameter as the flange joint disc on the left to facilitate friction between the external thread grinding head (12) and the inner wall surface of the flange joint disc when the connecting rod reciprocating push module (11) drives the external thread grinding head (12). S103: Start the second servo pulley drive unit (13) to work. The rotational power of the second servo pulley drive unit (13) is transmitted to the hollow spindle (6). The hollow spindle (6) drives the secondary shaft (9) and polishing disc (10) to rotate. During this process, the polishing disc (10) will contact the disc surface of the flange joint and perform polishing. The hollow spindle (6) drives the driven double-station rotary structure (7) to work through the synchronous belt drive structure (14). The driven double-station rotary structure (7) causes the flange joints on its left and right sides to rotate. During this process, part of the rotational power of the hollow spindle (6) will also be transmitted to the connecting rod reciprocating push module (11). The connecting rod reciprocating push module (11) forces the external thread grinding head (12) to move back and forth in the direction of the extension of the central axis of the left flange joint. Then the contact between the external thread grinding head (12) and the inner wall surface of the left flange joint is achieved, and the inner wall surface of the flange joint is finely ground. S104: During the polishing process, staff continuously monitor parameter changes and make immediate adjustments if any abnormalities are detected. S105: After polishing, the staff first visually inspects the surface quality of the flange joint to confirm whether the polishing effect meets the predetermined requirements. At the same time, the staff uses precision instruments to measure the smoothness and flatness of the flange joint to ensure that the quality of the polishing process meets the technical standards. After meeting the quality standards, the polished flange joint is taken out from the driven double-station rotary structure (7) for subsequent cleaning, inspection or assembly.

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