Hydrogen pipeline forming device and forming method

Abstract

The application provides a hydrogen conveying pipe forming device and a forming method, and relates to the technical field of metal straight slit pipe welding forming, wherein the forming device comprises a work frame, a conveying roller unit and a welding gun; further comprising a pre-welding positioning unit and a post-welding processing unit; the pre-welding positioning unit comprises two rotating positioning cone rollers; during conveying of the workpiece, the two positioning cone rollers are located in the slit and can respectively roll against the two side edges of the slit to limit self-rotation of the workpiece; the post-welding processing unit comprises a polishing arm, a plurality of polishing wheels and a polishing belt; the polishing belt abuts against the outer periphery of the workpiece and polishes the weld seam. The forming device provided by the application realizes the positioning effect of the slit position by abutting and pressing the positioning cone rollers against the side edges of the slit; meanwhile, the positioning device can also fine-tune the pipe blank that slightly self-rotates, improves the consistency of the slit position, avoids deviation between the slit and the welding gun, and reduces the phenomenon of poor welding effect or even unqualified welding.

Description

Technical Field

[0001] This invention belongs to the field of metal straight seam pipe welding and forming technology, specifically, it relates to a hydrogen transportation pipeline forming device and forming method. Background Technology

[0002] The main technical routes for hydrogen pipeline forming are metal straight seam welded pipe forming and multi-layer composite pipe forming. The former is suitable for high-pressure long-distance transmission, while the latter focuses on lightweighting and hydrogen barrier. In addition to transporting materials, metal straight seam welded pipes can also be used as steel pipes for piling, bridges, buildings and other structures.

[0003] In existing technologies, the forming of straight seam welded metal pipes has the advantages of continuous production and high efficiency, but at the same time, it also places higher demands on the quality of the weld. The common production process steps are uncoiling, slitting, forming frame (usually roller continuous forming), welding with welding gun, deburring, online heat treatment, cooling, sizing, and flying saw cutting, which results in metal steel pipes of a certain length. Then, the finished products are transferred, stored, and shipped out through multiple processes, and finally transported to the construction site. The welding methods mainly include two types: high frequency resistance welding (HFW) and submerged arc welding (SAWL).

[0004] Steel plates are rolled into tube blanks. During the rolling process, the edges of the steel plates on both sides roll upwards and gradually approach each other. Looking along the conveying direction, the gap between the two sides gradually decreases during the rolling process, eventually forming a strip to be welded. After welding by the torch, a long strip weld is formed. The correspondence between the strip and the torch position during the welding process directly affects the weld quality. At the same time, the entire pipe forming production line is a continuous operation. During the tube blank forming, the tube blank rotates at a small angle. When the rotating workpiece is conveyed to the torch, the strip cannot be completely aligned with the torch position, which can easily reduce the weld quality or even cause welding failure and produce defective products. Considering the high production speed of the forming line, this will not only cause a batch of defective products, but also increase production costs and defective product disposal costs. Therefore, it is necessary to optimize the existing technology to improve the weld quality.

[0005] In addition, after welding, the surface of the pipeline must be treated with anti-corrosion and anti-rust treatment to give the pipeline excellent anti-corrosion and anti-rust performance. Therefore, special attention should be paid to the treatment of the pipeline weld, and the surface quality of the weld should be improved without reducing the quality of the weld. Summary of the Invention

[0006] The purpose of this invention is to provide a hydrogen pipeline forming device and forming method, which solves the problem in related technologies that the welding effect is poor due to inconsistent correspondence between the pipe blank slot and the nozzle position or improper weld treatment measures after welding.

[0007] At least one embodiment of the present invention provides a hydrogen pipeline forming device, including a work frame, a conveying roller unit disposed on the work frame for conveying workpieces, and a welding gun disposed above the conveying roller unit for welding seams on the workpieces. The seams narrow during workpiece conveying and form welds after welding. The forming device further includes a pre-welding positioning unit and a post-welding processing unit. The pre-welding positioning unit includes two positioning cone rollers rotatably connected to the work frame. The two positioning cone rollers are located inside the seams. During workpiece conveying, the two positioning cone rollers can roll and abut against the two sides of the seams respectively to limit the rotation of the workpieces. The post-welding processing unit includes a grinding arm that is lifted and horizontally slidably disposed on the work frame, a plurality of grinding wheels rotatably disposed on the grinding arm, and a grinding belt sleeved on the outer periphery of the grinding wheels. The grinding belt is arranged to abut against the outer periphery of the workpiece under the displacement of the grinding arm and grinds the weld.

[0008] According to an exemplary embodiment of this disclosure, the positioning cone roller is connected to the work frame by means of an adjustment unit, the adjustment unit including a crossbar rotatably connected to the work frame and a telescopic member disposed on the work frame for driving the crossbar to rotate.

[0009] According to an exemplary embodiment of this disclosure, the crossbar is vertically and dynamically connected to the work frame via a telescopic member.

[0010] According to an exemplary embodiment of this disclosure, the rotation axis of the grinding wheel is set at an angle to the workpiece conveying direction. After the grinding arm is lowered, it can drive the two grinding wheels at the lower end to be located on both sides of the workpiece, so that the grinding wheel between the two grinding wheels at the lower end completely covers the weld.

[0011] According to an exemplary embodiment of this disclosure, a sliding member is slidably connected to the grinding arm via an elastic member two, and a tensioning wheel is rotatably provided at the end of the sliding member away from the elastic member two, which rolls against the grinding belt.

[0012] According to an exemplary embodiment of this disclosure, the post-weld treatment unit further includes a pre-scraping assembly, which includes a cutter head rotatably and vertically connected to the work stand, an outer scraper slidably disposed along the radial direction of the cutter head, and a locking member for fixing the outer scraper to the cutter head. The number of outer scrapers is several and they are circumferentially distributed. The outer scraper has an arc-shaped cutting head, which is configured to abut against the outer periphery of the workpiece under the sliding action of the outer scraper to scrape off impurities on the outer periphery of the workpiece.

[0013] According to an exemplary embodiment of this disclosure, the pre-scraping assembly further includes an inner scraping arm that is lifted and slidably connected to the work frame along the workpiece conveying direction, an inner scraper disposed at the upper end of the inner scraping arm for scraping the inner wall of the workpiece, and a plurality of support members disposed at the lower end of the inner scraping arm. The plurality of support members are spaced apart along the workpiece conveying direction. Each support member includes two arms arranged at an included angle, and the outer end of each arm is rotatably provided with a roller that rolls in cooperation with the inner bottom wall of the workpiece.

[0014] According to an exemplary embodiment of this disclosure, the two support arms are coaxially hinged, and each support arm has an outwardly extending rod portion. The pre-scraping assembly further includes a plurality of adjusting members that are arranged one-to-one with the support member. Each adjusting member includes two nut seats that are slidably disposed in opposite directions below the inner scraping cross arm along the workpiece conveying direction, and a bidirectional threaded screw that passes through the nut seats and is threadedly connected to the two nut seats. The bidirectional threaded screws of two adjacent adjusting members are connected by a transmission shaft. The bidirectional threaded screws can be driven by the rotation of the transmission shaft to push the two support arms to swing in opposite directions through the two nut seats, so as to adjust the included angle between the two support arms.

[0015] A method for forming a hydrogen pipeline, applied to the aforementioned hydrogen pipeline forming apparatus, includes the following steps: Step S10: Loading the workpiece, which is a tube blank with an upward-facing slit, is conveyed using a conveyor roller unit; Step S20: Reposition the workpiece, start the positioning cone roller to place it in the slot, and use the two positioning cone rollers to abut and limit the two sides of the slot respectively; Step S30: Workpiece welding, start the welding gun to weld the seam to form a weld; Step S40: Weld treatment, using the grinding wheel to grind the burrs, slag, high points, etc. at the weld position.

[0016] According to an exemplary embodiment of this disclosure, before implementing step S40, the inner and outer sides of the workpiece weld are scraped off with an outer scraper and an inner scraper respectively to reduce burrs and large pieces of welding slag; when implementing step S40, rough grinding and fine grinding are performed in sequence for a total of two grinding operations. After rough grinding, the weld is finely ground with a grinding belt set at an angle to the workpiece conveying direction to improve the grinding quality.

[0017] The hydrogen pipeline forming device provided in this invention achieves the positioning effect of the slit by pressing the positioning cone roller against the side of the slit. At the same time, it can fine-tune the slightly rotating tube blank, improve the consistency of the slit position before welding, avoid the deviation between the slit and the welding torch, provide a favorable basic environment for welding, and reduce the occurrence of poor welding effect or even welding failure. Meanwhile, the post-weld treatment unit can re-process the weld after welding, which can effectively improve the surface quality of the weld, thereby providing a good pipeline surface quality for subsequent corrosion and rust prevention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a hydrogen pipeline forming device provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure at the junction of the workpiece and the positioning cone roller; Figure 3 This is an embodiment of the present invention. Figure 1 A schematic diagram of the overall structure of the forming device from another angle; Figure 4 This is an embodiment of the present invention. Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is an embodiment of the present invention. Figure 1 Schematic diagram of the structure of Chinese and foreign scrapers; Figure 6 This is an embodiment of the present invention. Figure 3 A magnified view of a section at point B in the middle; Figure 7 This is an embodiment of the present invention. Figure 3 A magnified view of a section at point C; Figure 8 This is an embodiment of the present invention. Figure 1 A schematic diagram of the overall structure of the forming device from the second angle (including the interior of the workpiece); Figure 9 This is an embodiment of the present invention. Figure 8 A magnified view of a section at point D.

[0020] In the diagram: 10. Work frame; 11. Conveyor roller unit; 12. Welding gun; 20. Pre-welding positioning unit; 21. Positioning cone roller; 22. Adjustment unit; 221. Crossbar; 222. Telescopic component two; 223. Telescopic component one; 30. Post-welding processing unit; 31. Grinding arm; 32. Grinding wheel; 33. Grinding belt; 34. Elastic component two; 35. Sliding component; 36. Tensioning wheel; 37. Pre-scraping assembly; 371. Cutter head; 372. Outer scraper; 373. Locking component; 374. Inner scraper cross arm; 375. Inner scraper; 376. Support component; 377. Support arm; 3771. Rod; 378. Roller; 379. Adjustment component; 3791. Nut seat; 3792. Double-ended threaded screw; 3793. Drive shaft; 90. Workpiece. Detailed Implementation

[0021] The specific embodiments of this disclosure 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 this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0025] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0026] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0027] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure.

[0028] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0029] like Figures 1-9 As shown, this invention illustrates a hydrogen pipeline forming apparatus according to an embodiment of the present invention. The apparatus gradually rolls and shapes a steel plate, sequentially forming a pipe blank with a weld seam and then a pipe with a weld seam during the steel plate conveying process. The entire operation is continuous until the subsequent cutting process cuts the pipe. The forming apparatus includes a work frame 10, a conveying roller unit 11, a welding torch 12, and positioning cone rollers 21. It also includes a pre-welding positioning unit 20 and a post-welding processing unit 30. The number of positioning cone rollers 21 is two; the two positioning cone rollers 21 can be on the same side of the workpiece 90, or on the left and right sides of the workpiece 90 respectively, such as... Figure 1 and Figure 2 As shown, in this example, two positioning cone rollers 21 are located on the left and right sides of the workpiece 90, respectively. The two ends of the positioning cone rollers 21 are a large diameter head and a small diameter head, respectively, with the small diameter head facing downwards. The steel plate is processed by the forming frame, which is generally selected from existing roller continuous forming equipment. The roller continuous forming equipment and the conveying roller unit 11 continuously convey the workpiece 90. During the forming process of the forming frame, the two sides of the steel plate (the left and right sides along the length) are rolled up from both sides and gradually come together to form a tube blank. A slot with a gradually decreasing spacing is formed between the two upper sides of the tube blank. As the steel plate is rolled up upwards, the left and right sides of the slot (that is, the left and right sides of the steel plate) roll and abut against the two positioning cone rollers 21 respectively. With the fixed-point positioning function of the positioning cone rollers 21, the position of the two sides of the slot is constrained, improving the accuracy of the slot position on the tube blank. This prevents the entire tube blank from slightly rotating and causing the slot position deviation, thereby improving the welding quality and avoiding the occurrence of welding defects.

[0030] In addition, the post-weld processing unit 30 includes a grinding arm 31 that is lifted and horizontally slidably mounted on the work frame 10, several grinding wheels 32 that are rotatably mounted on the grinding arm 31, and a grinding belt 33 that is sleeved around the outer periphery of the grinding wheels 32. During operation, the grinding arm 31 is driven by a device that can provide linear drive in the prior art, such as a hydraulic cylinder, pneumatic cylinder, or electric cylinder, to adjust its height, horizontal orientation, and relative position on the work frame 10. Considering that the grinding belt 33 is generally used for flat grinding, uneven grinding is likely to occur when grinding the curved peripheral wall of the pipe. Furthermore, such as... Figure 1 and Figure 3 As shown, in order to improve the polishing effect, the entire polishing process is divided into rough polishing and fine polishing.

[0031] Rough grinding includes a grinding arm 31, at least two grinding wheels 32, a grinding belt 33, and a rotary drive that provides driving force, such as... Figure 3 and Figure 6 As shown, the rotary drive can be any existing device that can provide rotary drive, such as a motor. By adjusting the grinding arm 31 for coarse grinding, the axis of rotation of the grinding wheel 32 is made perpendicular to the conveying direction of the pipeline and extends horizontally. Then, the grinding arm 31 is driven to move above the pipeline. The grinding arm 31, along with the grinding wheel 32 and the grinding belt 33, descends until the pipeline just comes into contact with the grinding belt 33. The coarse grinding belt is used to grind the weld seam, removing burrs, welding slag, etc., eliminating external impurities of the pipeline, and facilitating subsequent surface treatment of the pipeline, such as anti-corrosion and anti-rust treatment.

[0032] The fine polishing process includes a polishing arm 31, at least three polishing wheels 32, a polishing belt 33, and a rotary drive unit 2 that provides driving force, such as... Figure 3 and Figure 7 As shown, four grinding wheels 32 are used for fine grinding in this example. The rotation axis of the grinding wheels 32 is set at an angle to the pipeline conveying direction. When the grinding belt 33 is working, there is at least one grinding wheel 32 on each side of the pipeline. That is, the lowest point of the grinding wheel 32 is lower than the highest point of the pipeline, so that the grinding belt 33 between the two grinding wheels 32 can completely fit against the top of the pipeline (weld). With the help of the specially designed grinding wheels 32, the grinding belt 33 is driven to grind the outer circumference of the pipeline in a transmission direction that is at an angle to the workpiece axis. The grinding belt 33 can completely cover the area to be ground (weld), improving the uniformity and comprehensiveness of grinding.

[0033] When rough grinding and fine grinding are performed simultaneously, rough grinding can remove larger burrs or welding slag and other impurities in advance, providing a stable grinding environment for fine grinding. This not only improves the overall grinding quality, but also reduces the significant cutting and cracking effects caused by welding slag and other impurities on the side of the grinding belt 33 (relative to the transmission direction) during fine grinding. It also extends the service life of the grinding belt 33.

[0034] This embodiment provides a hydrogen pipeline forming device that achieves the positioning effect of the slit by pressing the positioning cone roller 21 against the side of the slit. At the same time, it can fine-tune the slightly rotating tube blank, improve the consistency of the slit position of the workpiece 90 before welding, avoid the deviation between the slit and the welding torch 12, provide a favorable basic environment for improving welding, and reduce the occurrence of poor welding effect or even welding failure. Meanwhile, the post-weld treatment unit 30 can re-process the weld after welding, which can effectively improve the surface quality of the weld, thereby providing a good pipeline surface quality for subsequent corrosion and rust prevention.

[0035] Furthermore, considering that the grinding belt 33 needs to be fitted to the top of the pipe during the fine grinding process, and that the tension of the grinding belt 33 will change significantly during operation and rest, a sliding member 35 is added to the grinding arm 31 for fine grinding. The sliding member 35, under the elastic force provided by the elastic element 34, causes the tensioning wheel 36 to press against the surface of the grinding belt 33, ensuring that the tension of the grinding belt 33 is constantly in elastic adjustment, preventing the grinding belt 33 from slackening and slipping off the wheel. The elastic element 34 is a spring from the prior art, and the tensioning wheel 36 can also be replaced by a rotating shaft-like component.

[0036] refer to Figure 1 and Figure 2In one possible implementation, the forming device is refined by adding an adjustment unit 22 between the positioning cone roller 21 and the work frame 10. The adjustment unit 22 includes a telescopic member 222 and a crossbar 221. The crossbar 221 is connected to the work frame 10 by means of a vertically telescopic member 223. In use, the positioning cone roller 21 is displaced by means of the force provided by the telescopic member 223 and the telescopic member 222. Both the telescopic member 223 and the telescopic member 222 can be selected from existing devices that can provide linear drive, such as cylinders or electric cylinders. The specific structural design is as follows: The work frame 10 is equipped with a telescopic component 223 that can extend and retract vertically. A crossbar 221 is fixedly connected to the sliding end of the telescopic component 223. A positioning cone roller 21 is rotatably provided at the end of the crossbar 221 away from the telescopic component 223. With the help of the telescopic component 223 extending and retracting vertically, the positioning cone roller 21 can be driven by the crossbar 221 to achieve a change in height position. This can be applied to workpieces 90 with different diameters. At the same time, the upward-rising positioning cone roller 21 can also be used for daily maintenance. The fixed end of telescopic component 223 is rotatably connected to the work frame 10, and the fixed end of telescopic component 223 is equipped with a swing arm. A horizontally telescopic component 222 is located on the work frame 10 and on the side of telescopic component 223. The sliding end of telescopic component 222 is equipped with a pivot pin, which is slidably mounted on the swing arm. The telescopic action of telescopic component 222 drives the swing arm and telescopic component 223 to rotate, thereby adjusting the horizontal position of the crossbar 221 and the positioning cone roller 21. This is suitable for workpieces 90 of different diameters and slot widths. The combined telescopic action of telescopic component 223 and telescopic component 222 allows for adjustment of the height and horizontal position of the crossbar 221 and the positioning cone roller 21, thus adapting to pipe forming operations of different diameters.

[0037] refer to Figure 1 , Figures 3-5 and Figures 8-9 In one possible implementation, the post-weld processing unit 30 is refined by adding a pre-scraping component 37, which mainly performs two parts: external scraping and internal scraping.

[0038] The external scraping operation includes a cutter head 371, several external scrapers 372, and locking components 373. The cutter head 371 also has several pairs of locking frames, each with a locking hole. Each external scraper 372 corresponds to at least two pairs of locking frames. Figures 3-4 As shown, in this example, one outer scraper 372 corresponds to two sets of paired locking frames. The two locking frames in each pair are located on both sides of the outer scraper 372. The outer scraper 372 has a through hole, and the locking member 373 passes through the locking hole and the through hole to fix the relative position between the outer scraper 372 and the cutter head 371.

[0039] Generally, scrapers used for scraping the outer wall of pipes have flat blades, which results in only a small portion of the pipe's outer circumference being scraped away. This type of operation is ineffective, leaving a lot of residue after scraping. In this design, the outer scraper 372 is equipped with an arc-shaped cutter head. The arc-shaped cutter head can more thoroughly scrape away the debris on the outer circumference of the pipe, maximizing the scraping effect and providing a good foundation for subsequent processing such as grinding. Several outer scrapers 372 are designed in a circular pattern on the cutter head 371. Each outer scraper 372 uses a cutter head with a different arc size, which can be adapted to pipes of different diameters. When the pipe diameter changes, rotating the cutter head 371 can meet the processing needs of pipes of different diameters.

[0040] Each outer scraper 372 on the cutter head 371 has two states: working state and retracted state. Two sets of locking frames adapted to the outer scraper 372 are distributed radially along the cutter head 371, namely the inner locking frame and the outer locking frame. When the outer scraper 372 is in the retracted state, the through hole on the outer scraper 372 coincides with the locking hole on the inner locking frame, and the outer scraper 372 is fixed to the cutter head 371 by means of the locking member 373. At this time, the cutting head of the outer scraper 372 is retracted into the cutter head 371. When the outer scraper 372 is in the working state, the through hole of the outer scraper 372 coincides with the locking hole on the outer locking frame, and the outer scraper 372 is fixed to the cutter head 371 by means of the locking member 373. At this time, the arc-shaped cutting head of the outer scraper 372 extends to the outside of the cutter head 371. By rotating the cutter head 371, the outer scraper 372 in the working state corresponds to the workpiece 90.

[0041] like Figure 1 , Figure 3 and Figure 8 As shown, in this example, the cutter head 371 is driven by a device that can provide linear drive in the prior art, such as a hydraulic cylinder, pneumatic cylinder or electric cylinder, and the height position, horizontal orientation and relative position on the work stand 10 of the cutter head 371 are adjusted by the above-mentioned device.

[0042] refer to Figure 1 , Figure 3 and Figures 8-9 The internal scraping operation includes an internal scraping cross arm 374, an internal scraper 375, a support member 376, and an adjusting member 379. The support member 376 includes two support arms 377 arranged at an included angle. Rollers 378 are rotatably provided at the outer ends of the support arms 377. The two support arms 377 are coaxially hinged. The support arms 377 have an outwardly extending rod portion 3771. The adjusting member 379 includes a nut seat 3791, a two-way threaded screw 3792, and a drive shaft 3793. There are several support members 376 and adjusting members 379, and they are arranged in a one-to-one correspondence.

[0043] During operation, the inner scraper arm 374 is driven by a device that can provide linear drive, such as a hydraulic cylinder, pneumatic cylinder, or electric cylinder, to adjust its height, horizontal orientation, and relative position on the workpiece 10. Before forming a narrow slit on both sides of the steel plate, the inner scraper arm 374 is adjusted to be above the workpiece 90 and parallel to the conveying direction of the workpiece 90. Then, an external force (e.g., an electric cylinder, hydraulic cylinder, etc.) is applied to drive the lower inner scraper arm 374 until it is aligned with the center of the tube blank. Then, an external force is applied to drive the inner scraper arm 374 to insert into the tube blank a certain distance and then stop moving. At this time, the inner scraper blade 375 moves to the bottom of the weld seam, and from a top-down perspective, the welding torch 12 is located between the slit and the inner scraper blade 375. Then, using a device that can provide linear drive, the inner scraper arm 374 is driven by a device that can provide linear drive. Moving equipment, such as a motor, outputs power to drive the drive shaft 3793 to rotate, and stops rotating after reaching a certain angle. When the drive shaft 3793 rotates, it will synchronously drive all the bidirectional threaded screws to rotate through other drive shafts 3793. The bidirectional threaded screws drive the two nut seats 3791 in the same adjusting component 379 to move closer to each other. The two nut seats 3791 that move closer to each other drive the two support arms 377 to swing towards each other through the sliding rod 3771. The swinging support arms 377 drive the rollers 378 to swing synchronously. When the drive shaft 3793 stops rotating, the rollers 378 on the two support arms 377 roll and abut against the bottom of the inner wall of the pipe, and the upper arc-shaped blade of the inner scraper 375 abuts against the top of the inner wall of the pipe. The inner scraper 375 scrapes the inside of the pipe to prevent burrs, impurities, etc. from remaining on the inner wall of the pipe.

[0044] Looking along the pipeline transport direction, there are several support members 376 and several adjusting members 379, each corresponding to the other. From a top view, there are several support members 376 and several adjusting members 379 symmetrically distributed on the left and right sides of the inner scraper arm 374. The multiple sets of settings improve the stability of the inner scraper arm 374 when it extends into the pipeline. At the same time, when the inner scraper arm 374 extends in and moves out, the rollers 378 can also serve as rolling supports, reducing the deformation of the equipment frame caused by the unilateral setting of the inner scraper arm 374, improving the stability of equipment operation and extending the service life.

[0045] like Figures 1-9 As shown, it illustrates a hydrogen pipeline forming method according to an embodiment of the present invention. This method is applied to the aforementioned hydrogen pipeline forming apparatus and specifically includes the following steps: Step S10: Loading workpiece 90. Workpiece 90 is a tube blank with an upward-facing slit, which is conveyed by conveying roller unit 11. Step S20: Reposition the workpiece 90, start the positioning cone roller 21 to place it in the slot, and use the two positioning cone rollers 21 to abut and limit the two sides of the slot respectively; Step S30: Weld workpiece 90, start welding gun 12 to weld the seam to form a weld; Step S40: Weld treatment, using grinding wheel 32 to grind burrs, slag, high points, etc. at the weld position.

[0046] Furthermore, before implementing step S40, the outer scraper 372 and the inner scraper 375 are used to scrape the inner and outer sides of the weld of workpiece 90 to reduce burrs and large pieces of welding slag. When implementing step S40, rough grinding and fine grinding are performed in sequence for a total of two grinding operations. After rough grinding, the weld is finely ground with the grinding belt 33 set at an angle to the conveying direction of workpiece 90 to improve the grinding quality.

[0047] By employing the aforementioned pipe forming method, the positional accuracy of the weld seam before pipe forming can be improved, reducing the occurrence of poor weld quality or even welding failure due to weld seam position displacement caused by the workpiece's 90° rotation, thus avoiding the risk of increased raw material costs. Simultaneously, it improves welding precision. External and internal scraping further enhances the post-weld treatment effect, preventing large burrs, weld slag, and other impurities from remaining or adhering to the inside and outside of the pipe. Furthermore, the addition of coarse and fine grinding units provides meticulous external treatment of the weld seam, ensuring a high-quality pipe surface for subsequent corrosion and rust prevention treatments.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrogen pipeline forming apparatus, characterized by comprising: The device includes a work frame (10), a conveyor roller unit (11) mounted on the work frame (10) for conveying workpieces (90), and a welding torch (12) mounted above the conveyor roller unit (11) for welding the seams on the workpieces (90). The seams narrow during the conveying of the workpieces (90) and form a weld after welding. The forming device also includes a pre-welding positioning unit (20) and a post-welding processing unit (30). The pre-welding positioning unit (20) includes two positioning cone rollers (21) rotatably connected to the work frame (10). The two positioning cone rollers (21) are located at the seams. Inside the seam, during the conveying process of the workpiece (90), the two positioning cone rollers (21) can roll and abut against the two sides of the seam respectively to limit the rotation of the workpiece (90); the post-weld processing unit (30) includes a grinding arm (31) that is lifted and horizontally slidably mounted on the work frame (10), a number of grinding wheels (32) that are rotatably mounted on the grinding arm (31), and a grinding belt (33) that is sleeved on the outer periphery of the grinding wheel (32). The grinding belt (33) is arranged to abut against the outer periphery of the workpiece (90) and grind the weld seam under the displacement action of the grinding arm (31); The rotation axis of the grinding wheel (32) is set at an angle to the conveying direction of the workpiece (90). After the grinding arm (31) descends, it can drive the two grinding wheels (32) at the lower end to be located on both sides of the workpiece (90) so that the grinding wheel (32) between the two grinding wheels (32) at the lower end completely covers the weld. The post-weld processing unit (30) further includes a pre-scraping assembly (37), which includes a cutter head (371) rotatably and vertically connected to the work frame (10), an outer scraper (372) slidably disposed along the radial direction of the cutter head (371), and a locking member (373) for fixing the outer scraper (372) to the cutter head (371). The number of outer scrapers (372) is several and they are circumferentially distributed. The outer scraper (372) has an arc-shaped cutting head, which is configured to abut against the outer periphery of the workpiece (90) under the sliding action of the outer scraper (372) to scrape off impurities on the outer periphery of the workpiece (90). The pre-scraping assembly (37) further includes an inner scraping arm (374) that is lifted and slidably connected to the work frame (10) along the conveying direction of the workpiece (90), an inner scraper (375) disposed at the upper end of the inner scraping arm (374) and used to scrape the inner wall of the workpiece (90), and a plurality of support members (376) disposed at the lower end of the inner scraping arm (374). The plurality of support members (376) are spaced apart along the conveying direction of the workpiece (90). Each support member (376) includes two arms (377) arranged at an angle. The outer end of each arm (377) is rotatably provided with a roller (378) that rolls with the inner bottom wall of the workpiece (90). The positioning cone roller (21) is connected to the work frame (10) by means of an adjustment unit (22), which is used to adjust the height and horizontal position of the positioning cone roller (21).

2. The hydrogen pipeline forming device according to claim 1, characterized in that, The adjustment unit (22) includes a crossbar (221) rotatably connected to the work frame (10) and a telescopic member (222) disposed on the work frame (10) for driving the crossbar (221) to rotate.

3. The hydrogen pipeline forming device according to claim 2, characterized in that, The crossbar (221) is connected to the work frame (10) by means of a vertically telescopic telescopic component (223).

4. The hydrogen pipeline forming device according to claim 1, characterized in that, A sliding member (35) is slidably connected to the grinding arm (31) via an elastic member two (34). The end of the sliding member (35) away from the elastic member two (34) is rotatably provided with a tensioning wheel (36) that rolls against the grinding belt (33).

5. A hydrogen pipeline forming device according to any one of claims 1 or 4, characterized in that, The two support arms (377) are coaxially hinged. The support arm (377) has an extended rod (3771). The pre-scraping assembly (37) also includes several adjusting members (379) that are corresponding to the support member (376). The adjusting member (379) includes two nut seats (3791) that are slidably disposed in the direction of conveying the workpiece (90) below the inner scraping cross arm (374), and a bidirectional threaded screw (3792) that passes through the nut seats (3791) and is threadedly connected to the two nut seats (3791). The bidirectional threaded screws (3792) of two adjacent adjusting members (379) are connected by a drive shaft (3793). The bidirectional threaded screws (3792) can be driven by the rotation of the drive shaft (3793) to push the two support arms (377) to swing in opposite directions through the two nut seats (3791) to adjust the included angle between the two support arms (377).

6. A method for forming a hydrogen pipeline, applied to a hydrogen pipeline forming apparatus according to any one of claims 1 to 5, characterized in that, Includes the following steps: Step S10: Loading workpiece (90), workpiece (90) is a tube blank with an opening facing upwards, and is conveyed by conveying roller unit (11); Step S20: The workpiece (90) is repositioned, and the positioning cone roller (21) is activated to place it in the slot. The two positioning cone rollers (21) respectively abut and limit the two sides of the slot. Step S30: Welding of workpiece (90): Start the welding gun (12) to weld the seam to form a weld. Step S40: Weld treatment, using the grinding wheel (32) to grind the burrs, slag and high points at the weld position; Before implementing step S40, the inner and outer sides of the weld of the workpiece (90) are scraped with the help of the outer scraper (372) and the inner scraper (375) to reduce burrs and large pieces of welding slag. When implementing step S40, rough grinding and fine grinding are performed in sequence for a total of two grindings. After rough grinding, the weld is finely ground with the help of the grinding belt (33) set at an angle to the conveying direction of the workpiece (90) to improve the grinding quality.

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