A welding apparatus and method for welding an outer protective shell to an anti-hydrogen steel cylinder

Abstract

The application discloses a welding device and method for welding a protective shell on the outside of a hydrogen-resistant steel cylinder, and relates to the technical field of welding a protective shell on the outside of a hydrogen-resistant steel cylinder. The device comprises a base plate, a support seat fixed on the base plate, a lower arc-shaped groove opened on the top surface of the support seat, a flanging assembly and a welding assembly respectively arranged on the left and right sides of the support seat. A driving assembly for driving the rotation of the large gear is arranged on the right side of the large gear on the fixed shaft. The driving assembly comprises a connecting plate fixed on the fixed shaft, and a driving motor fixed on the right end surface of the connecting plate. The output shaft of the driving motor penetrates through the connecting plate and is provided with a small gear on the extended end. The small gear is engaged with the large gear. The application has the beneficial effects of effectively preventing the protective shell from falling off the hydrogen-resistant steel cylinder and greatly improving the quality of welding the protective shell on the hydrogen-resistant steel cylinder.

Description

Technical Field

[0001] This invention relates to the technical field of welding a protective shell to the outside of a hydrogen-resistant steel cylinder, and in particular to a welding apparatus and method for welding a protective shell to the outside of a hydrogen-resistant steel cylinder. Background Technology

[0002] Hydrogen storage wells are buried underground and their function is to store liquid hydrogen. A hydrogen storage well mainly consists of multiple hydrogen-resistant steel cylinders connected in series. The top of the top hydrogen-resistant steel cylinder is connected to a top cap, and the bottom of the bottom hydrogen-resistant steel cylinder is connected to a hemispherical end cap. The function of the hydrogen-resistant steel cylinders is to prevent the liquid hydrogen stored inside from permeating through them, thereby preventing liquid hydrogen from leaking to the outside.

[0003] Since the hydrogen-resistant steel cylinders are buried underground, the subsequent backfilling with rock or concrete will inevitably compress them, causing deformation and rendering them unusable. To address this issue, workers weld a protective shell 2 to the outside of each hydrogen-resistant steel cylinder 1. This stronger shell protects the cylinder 1 from deformation caused by the backfilling with rock or concrete. The existing technology for welding a protective shell 2 to the outside of the hydrogen-resistant steel cylinder 1 is as follows: Figure 1 As shown.

[0004] The method used by workers to weld a protective shell onto the outside of the hydrogen-resistant steel is as follows:

[0005] SI, the worker takes out a... Figure 2 The hydrogen-resistant steel cylinder 1 shown and a... Figure 3 The protective shell 2 shown has a length greater than that of the hydrogen-resistant steel cylinder 1, and the outer diameter of the hydrogen-resistant steel cylinder 1 is equal to the inner diameter of the protective shell 2.

[0006] SII. The worker places the protective shell 2 flat on the table 3, as follows: Figure 4 As shown, and ensuring that both ends of the protective shell 2 are suspended outside the table 3, the worker then inserts the hydrogen-resistant steel cylinder 1 through the inner hole of the protective shell 2 from right to left, as shown. Figure 5 As shown, ensure that both the left and right ends of the hydrogen-resistant steel cylinder 1 are exposed outside the protective shell 2;

[0007] SIII. The worker operates the laser welding equipment to weld the contact seam between the anti-hydrogen steel cylinder 1 and the protective shell 2 using the welding head of the laser welding equipment, forming two circumferential weld scars A4, as shown. Figure 6 As shown, two annular weld scars A4 weld the protective shell 2 to the hydrogen-resistant steel cylinder 1 as a whole, thus ultimately achieving the welding of a protective shell 2 to the outside of a hydrogen-resistant steel cylinder 1, as shown. Figure 1 The diagram shows a hydrogen-resistant steel cylinder 1 with a welded protective shell 2.

[0008] SIV. Workers repeat steps SI~SIII multiple times to weld a protective shell 2 onto the outside of each of the multiple hydrogen-resistant steel cylinders 1.

[0009] However, although the method used by the workers was able to weld the protective shell 2 to the outside of the hydrogen-resistant steel cylinder 1, it still revealed the following technical defects:

[0010] Since the right end of the protective shell 2 is fixed to the upper end of the hydrogen-resistant steel cylinder 1 only by a single annular weld A4, and the left end of the protective shell 2 is also fixed to the lower end of the hydrogen-resistant steel cylinder 1 only by a single annular weld A4, it means that the protective shell 2 is not firmly fixed to the hydrogen-resistant steel cylinder 1.

[0011] Therefore, when both the hydrogen-resistant steel cylinder 1 and the protective shell 2 are vertically buried underground, the protective shell 2 will damage the annular weld scar A4 under its own weight, causing the protective shell 2 to fall off the hydrogen-resistant steel cylinder 1 (while the process requires that the protective shell 2 should not fall off the hydrogen-resistant steel cylinder 1 after it is buried underground). This undoubtedly reduces the quality of welding the protective shell 2 onto the hydrogen-resistant steel cylinder 1.

[0012] Therefore, there is an urgent need for a welding device and method that can effectively prevent the protective shell from falling off the hydrogen-resistant steel cylinder and greatly improve the quality of welding the protective shell onto the hydrogen-resistant steel cylinder. Summary of the Invention

[0013] The purpose of this invention is to overcome the shortcomings of the prior art and provide a welding device and method for welding a protective shell to the outside of a hydrogen-resistant steel cylinder.

[0014] The objective of this invention is achieved through the following technical solution: a welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder, comprising a base plate, a support seat fixed on the base plate, a lower arc-shaped groove opened on the top surface of the support seat, flanges respectively disposed on the left and right sides of the support seat, and welding components.

[0015] The flange and welding assembly located on the right side of the support includes a vertical plate and a feed cylinder fixed on the right end face of the vertical plate. The piston rod of the feed cylinder passes through the vertical plate and a fixed shaft is fixed on the extended end. A flange cylindrical head is fixed on the left end of the fixed shaft. An annular groove is opened along its circumference on the left end face of the flange cylindrical head. The cross-section of the annular groove is U-shaped. A heat-conducting block is fixed on the outside of the flange cylindrical head. Multiple heating rods are fixed along its circumference inside the heat-conducting block.

[0016] A large gear located on the right side of the flanged cylindrical head is rotatably mounted on the fixed shaft. A bent plate extending downward to the left is fixed on the left end face of the large gear. A vertical cylinder is fixed on the bottom surface of the extended end of the bent plate. The piston rod of the vertical cylinder passes through the bent plate upward and a bracket is fixed on the extended end. A welded head extending upward to the right is fixed inside the bracket.

[0017] The fixed shaft is also provided with a drive assembly located on the right side of the large gear for driving the large gear to rotate. The drive assembly includes a connecting plate fixed on the fixed shaft and a drive motor fixed on the right end face of the connecting plate. The output shaft of the drive motor passes through the connecting plate and a small gear is installed on its extension end. The small gear meshes with the large gear.

[0018] A mounting plate is also fixed on the fixed shaft between the flanged cylindrical head and the large gear. A power module is fixed on the end face of the mounting plate. The power module is connected to each heating rod in the heat-conducting block via a power line.

[0019] Multiple blind holes are provided on the right end face of the heat-conducting block, each blind hole corresponding to a heating rod, and the heating rod is interference-fitted into the blind hole.

[0020] The welding head is connected to the laser welding equipment via a wire.

[0021] The flanges and welding components located on both sides of the support base are symmetrical about the support base.

[0022] An arched frame is fixed between the upright plates of the two flanges and welding components, and is mounted directly above the support base. A clamping cylinder is fixed on the top surface of the crossbeam of the arched frame. The piston rod of the clamping cylinder penetrates downward through the top wall of the arched frame and a clamping block is fixed on the extended end. The clamping block is located directly above the support base, and an upper arc groove is opened on the bottom surface of the clamping block.

[0023] Both the upper and lower arc-shaped grooves mate with the outer cylindrical surface of the protective shell.

[0024] The welding apparatus also includes a controller, which is electrically connected to the drive motor, feed cylinder, vertical cylinder, clamping cylinder and laser welding equipment via signal lines.

[0025] A method for welding a protective shell to the outside of a hydrogen-resistant steel cylinder, comprising the following steps:

[0026] S1. The worker takes out a hydrogen-resistant steel cylinder and a protective shell, ensuring that the length of the hydrogen-resistant steel cylinder is greater than the length of the protective shell, and that the outer diameter of the hydrogen-resistant steel cylinder is equal to the inner diameter of the protective shell.

[0027] S2. The worker inserts the hydrogen-resistant steel cylinder through the inner hole of the protective shell from right to left, ensuring that the protective shell is in the middle of the hydrogen-resistant steel cylinder;

[0028] S3. The worker places the protective shell into the lower arc-shaped groove of the support base from top to bottom, and ensures that the protective shell is in the middle of the support base. Since the lower arc-shaped groove of the support base matches the outer cylindrical surface of the protective shell, the protective shell is positioned. At this time, the protective shell is just below the upper arc-shaped groove of the clamping block. At the same time, the hydrogen-resistant steel cylinder is just between the annular grooves of the two flanges and welding components' flanged cylindrical heads.

[0029] S4. Fix the protective shell: Control the piston rod of the clamping cylinder to extend downwards, the piston rod drives the clamping block to move downwards, and the upper arc groove of the clamping block moves towards the protective shell; when the piston rod of the clamping cylinder is fully extended, the protective shell is just fixed between the lower arc groove of the support base and the upper arc groove of the clamping block, thus fixing the protective shell.

[0030] S5. The worker takes out two ring-shaped welding materials, puts the two ring-shaped welding materials on the left and right ends of the hydrogen-resistant steel cylinder respectively, and puts the two ring-shaped welding materials against the left and right end faces of the protective shell respectively.

[0031] S6. The piston rods of the feed cylinders of the two flanging and welding components extend simultaneously. The piston rods drive the fixed shaft to move towards the hydrogen-resistant steel cylinder. The fixed shaft drives the flanging cylindrical head, heat-conducting block, power module, large gear, bending plate, vertical cylinder, welding head and drive component on it to move synchronously. Among them, the annular groove of the flanging cylindrical head of the right flanging and welding component moves towards the right end of the hydrogen-resistant steel cylinder, while the annular groove of the flanging cylindrical head of the left flanging and welding component moves towards the left end of the hydrogen-resistant steel cylinder.

[0032] When the piston rods of the feed cylinders of both flange and welding components are fully extended, the right end of the hydrogen-resistant steel cylinder mates with the annular groove of the right flange and welding component, forming an outward-facing portion that covers the right annular weld and the right end of the protective shell. At the same time, the left end of the hydrogen-resistant steel cylinder mates with the annular groove of the left flange and welding component, forming an outward-facing portion that covers the left annular weld and the left end of the protective shell.

[0033] S7. Turn on the power module. The power module powers each heating rod in the heat-conducting block. The heating rod generates heat. The heat passes through the heat-conducting block, the flanged cylindrical head, and the outer flange in sequence, and is finally transferred to the annular solder. The heated annular solder welds the outer flange to the protective shell.

[0034] S8. The piston rods of the vertical cylinders of the two flanges and welding components extend out, and the piston rods drive the bracket to move upward, which in turn drives the welding head to move upward.

[0035] When the piston rods of the vertical cylinders of the two flange and welding components are fully extended, the welding head of the right flange and welding component is aligned with the contact seam between the right outward flange and the protective shell. At the same time, the welding head of the left flange and welding component is aligned with the contact seam between the left outward flange and the protective shell.

[0036] S9. Control the laser welding equipment to start, and the laser beam emitted by the welding head will irradiate the contact seam between the outward-facing part and the protective shell to start welding the contact seam;

[0037] Then, the drive motors controlling the two flanges and welding components start simultaneously. The drive motors drive the small gear to rotate, the small gear drives the large gear to rotate around its own axis, the large gear drives the large gear to rotate around the axis of the fixed shaft, and the large gear also drives the bending plate to rotate synchronously. The bending plate drives the vertical cylinder and the welding head to rotate around the axis of the fixed shaft. The rotating welding head gradually welds the contact seam.

[0038] After the welding head rotates 360°, the controller shuts down both the laser welding equipment and the drive motor. At this time, an annular weld scar B is formed between the right-side folded part and the protective shell. At the same time, an annular weld scar B is formed between the left-side folded part and the protective shell, thus finally achieving the welding of a protective shell on the outside of the hydrogen-resistant steel cylinder.

[0039] S10. The specific operating steps for removing the hydrogen-resistant steel cylinder with a welded protective shell are as follows:

[0040] S101, The piston rod of the vertical cylinder controlling the flanging and welding assembly retracts, and the piston rod drives the welding head to reset;

[0041] S102, control the piston rod of the clamping cylinder to retract upward, the piston rod drives the clamping block to move upward, so that the clamping block separates from the protective shell;

[0042] S103, the piston rod of the feed cylinder of the control flanging and welding assembly retracts, the piston rod drives the fixed shaft to move away from the hydrogen-resistant steel cylinder, and the fixed shaft drives the flanging cylindrical head, heat-conducting block, power module, large gear, bending plate, vertical cylinder, welding head and drive assembly on it to move synchronously; the annular groove of the flanging cylindrical head of the flanging and welding assembly moves away from the hydrogen-resistant steel cylinder, and the flanging cylindrical head separates from the outer flanging part;

[0043] S104. Workers remove the hydrogen-resistant steel cylinder with the welded protective shell from the support base;

[0044] S11. Workers can repeat steps S1 to S10 multiple times to weld a protective shell onto the outside of each of the hydrogen-resistant steel cylinders.

[0045] The present invention has the following advantages: it effectively prevents the protective shell from falling off the hydrogen-resistant steel cylinder and greatly improves the quality of welding the protective shell onto the hydrogen-resistant steel cylinder. Attached Figure Description

[0046] Figure 1 A schematic diagram of a structure in the prior art of hydrogen-resistant steel cylinders with an external protective shell welded on;

[0047] Figure 2 This is a structural schematic diagram of an existing hydrogen-resistant steel cylinder.

[0048] Figure 3 This is a schematic diagram of the structure of a protective shell in the prior art;

[0049] Figure 4 This is a diagram illustrating how to place the protective case flat on a tabletop.

[0050] Figure 5 A schematic diagram showing the hydrogen-resistant steel cylinder passing through the inner hole of the protective shell from right to left;

[0051] Figure 6 A schematic diagram showing the formation of two annular weld scars A between the hydrogen-resistant steel cylinder and the protective shell;

[0052] Figure 7 This is a schematic diagram of the structure of the present invention;

[0053] Figure 8 for Figure 7 M-direction schematic diagram;

[0054] Figure 9 for Figure 7 Main section diagram;

[0055] Figure 10 This is a schematic diagram of the structure of the flange and welding assembly of the present invention;

[0056] Figure 11 for Figure 10 K-direction diagram;

[0057] Figure 12 for Figure 10 Main section diagram;

[0058] Figure 13 This is a schematic diagram showing the connection between the flanged cylindrical head and the heat-conducting block of the present invention;

[0059] Figure 14 for Figure 13 Main section diagram;

[0060] Figure 15 This is a schematic diagram of the support base of the present invention;

[0061] Figure 16 for Figure 15Main section diagram;

[0062] Figure 17 A schematic diagram showing the hydrogen-resistant steel cylinder passing through the inner hole of the protective shell from right to left;

[0063] Figure 18 This is a schematic diagram showing the protective shell being inserted from top to bottom into the lower arc-shaped groove of the support base;

[0064] Figure 19 A schematic diagram showing the protective shell being fixed between the support base and the clamping block;

[0065] Figure 20 This is a schematic diagram of the structure of a ring-shaped solder.

[0066] Figure 21 for Figure 20 Main section diagram;

[0067] Figure 22 This is a schematic diagram showing the two annular welding rods respectively fitted onto the left and right ends of the hydrogen-resistant steel cylinder;

[0068] Figure 23 A schematic diagram showing the outward-flaring section formed at the right end of the hydrogen-resistant steel cylinder;

[0069] Figure 24 This is a schematic diagram showing the welding head aligned with the contact seam between the right-side outward-facing part and the protective shell.

[0070] Figure 25 A schematic diagram showing the annular weld scar B formed by welding the outer part of the hydrogen-resistant steel cylinder to the protective shell;

[0071] Figure 26 A schematic diagram of a structure in which a protective shell is welded to the outside of a hydrogen-resistant steel cylinder;

[0072] Figure 27 A diagram showing workers removing a hydrogen-resistant steel cylinder with a welded protective shell from a support base;

[0073] In the picture:

[0074] 1-Hydrogen-resistant steel cylinder, 2-Protective shell, 3-Table, 4-Circular weld scar A;

[0075] 5-Base plate, 6-Support base, 7-Lower arc groove, 8-Flanging and welding assembly, 9-Upright plate, 10-Feed cylinder, 11-Fixed shaft, 12-Flanged cylindrical head, 13-Annular groove, 14-Heat-conducting block, 15-Heating rod, 16-Large gear, 17-Bending plate, 18-Vertical cylinder, 19-Bracket, 20-Welding head, 21-Connecting plate, 22-Drive motor, 23-Small gear, 24-Power module;

[0076] 25-Arch-shaped frame, 26-Clamping cylinder, 27-Clamping block, 28-Upper arc-shaped groove;

[0077] 29- Circular solder, 30- Outward turn, 31- Circular weld scar B. Detailed Implementation

[0078] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0079] like Figures 7-16 As shown, a welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder includes a base plate 5, a support base 6 fixed on the base plate 5, a lower arc-shaped groove 7 opened on the top surface of the support base 6, and flanges and welding components 8 respectively arranged on the left and right sides of the support base 6; the flanges and welding components 8 located on both sides of the support base 6 are symmetrical about the support base 6.

[0080] The flange and welding assembly 8 located on the right side of the support base 6 includes a vertical plate 9 and a feed cylinder 10 fixed on the right end face of the vertical plate 9. The piston rod of the feed cylinder 10 passes through the vertical plate 9 and a fixed shaft 11 is fixed on the extended end. A flanged cylindrical head 12 is fixed on the left end of the fixed shaft 11. An annular groove 13 is opened along its circumference on the left end face of the flanged cylindrical head 12. The cross-section of the annular groove 13 is U-shaped. A heat-conducting block 14 is fixedly fitted on the outside of the flanged cylindrical head 12. Multiple heating rods 15 are fixedly installed along its circumference inside the heat-conducting block 14. Multiple blind holes are opened on the right end face of the heat-conducting block 14. Each blind hole corresponds to a heating rod 15. The heating rod 15 is interference-fitted into the blind hole.

[0081] A large gear 16 located to the right of the flanged cylindrical head 12 is rotatably mounted on the fixed shaft 11. A bent plate 17 extending downward to the left is fixed on the left end face of the large gear 16. A vertical cylinder 18 is fixed on the bottom surface of the extended end of the bent plate 17. The piston rod of the vertical cylinder 18 passes through the bent plate 17 upward and a bracket 19 is fixed on the extended end. A welding head 20 extending upward to the right is fixed inside the bracket 19. The welding head 20 is connected to the laser welding equipment via a wire.

[0082] The fixed shaft 11 is also equipped with a drive assembly located to the right of the large gear 16 for driving the large gear 16 to rotate. The drive assembly includes a connecting plate 21 fixed to the fixed shaft 11 and a drive motor 22 fixed to the right end face of the connecting plate 21. The output shaft of the drive motor 22 passes through the connecting plate 21 and a small gear 23 is installed on its extended end. The small gear 23 meshes with the large gear 16. The fixed shaft 11 is also equipped with a mounting plate located between the flanged cylindrical head 12 and the large gear 16. A power module 24 is fixed to the end face of the mounting plate. The power module 24 is connected to each heating rod 15 in the heat-conducting block 14 via a power cable.

[0083] An arched frame 25 is fixed between the upright plates 9 of the two flanges and welding components 8 and is mounted directly above the support base 6. A clamping cylinder 26 is fixed on the top surface of the crossbeam of the arched frame 25. The piston rod of the clamping cylinder 26 penetrates downward through the top wall of the arched frame 25 and a clamping block 27 is fixed on the extended end. The clamping block 27 is located directly above the support base 6. An upper arc groove 28 is opened on the bottom surface of the clamping block 27.

[0084] Both the upper arc-shaped groove 28 and the lower arc-shaped groove 7 mate with the outer cylindrical surface of the protective shell 2. The welding device also includes a controller, which is electrically connected to the drive motor 22, the feed cylinder 10, the vertical cylinder 18, the clamping cylinder 26, and the laser welding equipment via signal lines. The operator can control the extension or retraction of the piston rods of the feed cylinder 10, the vertical cylinder 18, and the clamping cylinder 26 via the controller. At the same time, the operator can also control the start or stop of the drive motor 22 and the laser welding equipment, thereby facilitating the operator's operation.

[0085] A method for welding a protective shell to the outside of a hydrogen-resistant steel cylinder, comprising the following steps:

[0086] S1, the worker takes out a... Figure 2 The hydrogen-resistant steel cylinder 1 shown and a... Figure 3 The protective shell 2 shown ensures that the length of the hydrogen-resistant steel cylinder 1 is greater than the length of the protective shell 2, and that the outer diameter of the hydrogen-resistant steel cylinder 1 is equal to the inner diameter of the protective shell 2.

[0087] S2. The worker inserts the hydrogen-resistant steel cylinder 1 through the inner hole of the protective shell 2 from right to left, as follows: Figure 17 As shown, and ensure that the protective shell 2 is located in the middle of the hydrogen-resistant steel cylinder 1;

[0088] S3. The worker places the protective shell 2 into the lower arc-shaped groove 7 of the support base 6 from top to bottom, as follows: Figure 18 As shown, and ensure that the protective shell 2 is in the middle of the support base 6, since the lower arc groove 7 of the support base 6 matches the outer cylindrical surface of the protective shell 2, the protective shell 2 is positioned. At this time, the protective shell 2 is just below the upper arc groove 28 of the clamping block 27. At the same time, the hydrogen-resistant steel cylinder 1 is just between the annular groove 13 of the flanged cylindrical head 12 of the two flanges and welding components 8.

[0089] S4. Secure the protective shell 2: Control the piston rod of the clamping cylinder 26 to extend downwards, causing the clamping block 27 to move downwards. The upper arc-shaped groove 28 of the clamping block 27 moves towards the protective shell 2. When the piston rod of the clamping cylinder 26 is fully extended, the protective shell 2 is just fixed between the lower arc-shaped groove 7 of the support base 6 and the upper arc-shaped groove 28 of the clamping block 27. Figure 19 As shown, this achieves the goal of fixing the protective shell 2 in place;

[0090] S5, the worker took out two such... Figures 20-21The annular solder 29 shown is used to attach two annular solders 29 to the left and right ends of the hydrogen-resistant steel cylinder 1, respectively. Figure 22 As shown, two annular solder 29 are respectively placed against the left and right end faces of the protective shell 2;

[0091] S6. The piston rods of the feed cylinders 10 of the two flanging and welding components 8 extend simultaneously. The piston rods drive the fixed shaft 11 to move toward the hydrogen-resistant steel cylinder 1. The fixed shaft 11 drives the flanging cylindrical head 12, heat-conducting block 14, power module 24, large gear 16, bending plate 17, vertical cylinder 18, welding head 20 and drive components on it to move synchronously. Among them, the annular groove 13 of the flanging cylindrical head 12 of the right flanging and welding component 8 moves toward the right end of the hydrogen-resistant steel cylinder 1. At the same time, the annular groove 13 of the flanging cylindrical head 12 of the left flanging and welding component 8 moves toward the left end of the hydrogen-resistant steel cylinder 1.

[0092] When the piston rods of the feed cylinders 10 of both flange and welding components 8 are fully extended, the right end of the hydrogen-resistant steel cylinder 1 mates with the annular groove 13 of the right flange and welding component 8, forming an outward flange 30, as shown. Figure 23 As shown, the outward-flared portion 30 covers both the right-side annular weld 29 and the right end of the protective shell 2; simultaneously, the left end of the hydrogen-resistant steel cylinder 1 mates with the left-side flange and the annular groove 13 of the welding assembly 8, forming the outward-flared portion 30, which covers both the left-side annular weld 29 and the left end of the protective shell 2, as shown. Figure 23 As shown;

[0093] S7. Turn on the power module 24. The power module 24 supplies power to each heating rod 15 in the heat conduction block 14. The heating rod 15 generates heat. The heat passes through the heat conduction block 14, the flanged cylindrical head 12, and the outward flanged part 30 in sequence, and is finally transferred to the annular solder 29. The heated annular solder 29 welds the outward flanged part 30 to the protective shell 2 together.

[0094] S8, the piston rods of the vertical cylinders 18 of the two flanges and welding components 8 are extended, the piston rods drive the bracket 19 to move upward, and the bracket 19 drives the welding head 20 to move upward.

[0095] When the piston rods of the vertical cylinders 18 of both flange and welding components 8 are fully extended, the welding head 20 of the right flange and welding component 8 is aligned with the contact seam between the right outward flange 30 and the protective shell 2. Figure 24 As shown, at the same time, the flange on the left and the welding head 20 of the welding assembly 8 are aligned with the contact seam between the left outward flange 30 and the protective shell 2.

[0096] S9. Control the laser welding equipment to start, and the laser beam emitted by the welding head 20 irradiates the contact seam between the outwardly turned part 30 and the protective shell 2 to start welding the contact seam.

[0097] Then, the drive motors 22 controlling the two flange and welding components 8 start simultaneously. The drive motors 22 drive the small gear 23 to rotate, the small gear 23 drives the large gear 16 to rotate around its own axis, the large gear 16 drives the large gear 16 to rotate around the axis of the fixed shaft 11, the large gear 16 also drives the bending plate 17 to rotate synchronously, the bending plate 17 drives the vertical cylinder 18 and the welding head 20 to rotate around the axis of the fixed shaft 11, and the welding head 20, which is rotating, gradually welds the contact seam.

[0098] After the welding head 20 rotates 360°, the controller shuts down both the laser welding equipment and the drive motor 22. At this time, a ring-shaped weld scar B31 is formed between the right-side outward-facing portion 30 and the protective shell 2. Figure 25 As shown, simultaneously, an annular weld scar B31 is formed between the outwardly turned portion 30 on the left and the protective shell 2, thus ultimately achieving the welding of a protective shell 2 to the outside of the hydrogen-resistant steel cylinder 1, as shown. Figure 26 The diagram shows a structure with a protective shell 2 welded to the outside of the hydrogen-resistant steel cylinder 1.

[0099] In step S6, the piston rods of the feed cylinders 10 of the two flanges and welding components 8 are simultaneously extended to flip the left and right ends of the hydrogen-resistant steel cylinder 1 outwards, forming the outward-flipped part 30. Then, in step S7, the power module 24 is turned on so that the heated annular weld 29 welds the outward-flipped part 30 of the hydrogen-resistant steel cylinder 1 to the protective shell 2. Then, in steps S8 to S9, the vertical cylinder 18 and the drive motor 22 are operated in sequence to weld an annular weld scar B31 between the outward-flipped part 30 of the hydrogen-resistant steel cylinder 1 and the protective shell 2, thereby finally achieving the welding of a protective shell 2 to the outside of the hydrogen-resistant steel cylinder 1.

[0100] Therefore, it can be seen that the end of the protective shell 2 is not only welded to the outward-facing portion 30 of the hydrogen-resistant steel cylinder 1 via annular weld 29, but also welded to the outward-facing portion 30 of the hydrogen-resistant steel cylinder 1 via annular weld scar B31, thereby ensuring that the protective shell 2 is firmly welded to the hydrogen-resistant steel cylinder 1. This welding device, compared with existing technologies, such as... Figures 1-6 The welding method shown effectively prevents the protective shell 2 from falling off the hydrogen-resistant steel cylinder 1, thereby greatly improving the quality of welding the protective shell 2 onto the hydrogen-resistant steel cylinder 1.

[0101] S10. The specific steps for removing the hydrogen-resistant steel cylinder 1 with the welded protective shell 2 are as follows:

[0102] S101, The piston rod of the vertical cylinder 18 controlling the flanging and welding assembly 8 retracts, and the piston rod drives the welding head 20 to reset.

[0103] S102, control the piston rod of the clamping cylinder 26 to retract upward, the piston rod drives the clamping block 27 to move upward, so that the clamping block 27 separates from the protective shell 2;

[0104] S103, the piston rod of the feed cylinder 10 of the control flange and welding assembly 8 retracts, and the piston rod drives the fixed shaft 11 to move away from the hydrogen-resistant steel cylinder 1. The fixed shaft 11 drives the flange cylindrical head 12, heat-conducting block 14, power module 24, large gear 16, bending plate 17, vertical cylinder 18, welding head 20 and drive assembly on it to move synchronously. The annular groove 13 of the flange cylindrical head 12 of the flange and welding assembly 8 moves away from the hydrogen-resistant steel cylinder 1, and the flange cylindrical head 12 separates from the outer flange part 30.

[0105] S104. The worker removes the hydrogen-resistant steel cylinder 1, which is welded with the protective shell 2, from the support base 6, in the following direction: Figure 27 As indicated by the solid arrow in the center;

[0106] S11. Workers repeat steps S1 to S10 multiple times to weld a protective shell 2 onto the outside of each of the multiple hydrogen-resistant steel cylinders 1.

Claims

1. A welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder, characterized in that: It includes a base plate (5), a support seat (6) fixed on the base plate (5), a lower arc groove (7) opened on the top surface of the support seat (6), and flanges and welding components (8) respectively set on the left and right sides of the support seat (6). The flange and welding assembly (8) located on the right side of the support base (6) includes a vertical plate (9) and a feed cylinder (10) fixed on the right end face of the vertical plate (9). The piston rod of the feed cylinder (10) passes through the vertical plate (9) and a fixed shaft (11) is fixed on the extended end. A flanged cylindrical head (12) is fixed on the left end of the fixed shaft (11). An annular groove (13) is opened along its circumference on the left end face of the flanged cylindrical head (12). The cross-section of the annular groove (13) is U-shaped. A heat-conducting block (14) is fixed on the outside of the flanged cylindrical head (12). Multiple heating rods (15) are fixed along its circumference inside the heat-conducting block (14). A large gear (16) located to the right of the flanged cylindrical head (12) is rotatably mounted on the fixed shaft (11). A bent plate (17) extending downward to the left is fixed on the left end face of the large gear (16). A vertical cylinder (18) is fixed on the bottom surface of the extended end of the bent plate (17). The piston rod of the vertical cylinder (18) passes through the bent plate (17) upward and a bracket (19) is fixed on the extended end. A welding head (20) extending upward to the right is fixed inside the bracket (19). The fixed shaft (11) is also provided with a drive assembly located on the right side of the large gear (16) for driving the large gear (16) to rotate. The drive assembly includes a connecting plate (21) fixed on the fixed shaft (11) and a drive motor (22) fixed on the right end face of the connecting plate (21). The output shaft of the drive motor (22) passes through the connecting plate (21) and a small gear (23) is installed on the extended end. The small gear (23) meshes with the large gear (16).

2. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 1, characterized in that: The fixed shaft (11) is also fixed with a mounting plate located between the flanged cylindrical head (12) and the large gear (16). A power module (24) is fixed on the end face of the mounting plate. The power module (24) is connected to each heating rod (15) in the heat-conducting block (14) via a power line.

3. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 2, characterized in that: Multiple blind holes are provided on the right end face of the heat-conducting block (14), and each blind hole corresponds to a heating rod (15). The heating rod (15) is interference-fitted into the blind hole.

4. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 3, characterized in that: The welding head (20) is connected to the laser welding equipment via a wire.

5. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 4, characterized in that: The flanges and welding components (8) located on both sides of the support base (6) are symmetrical about the support base (6).

6. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 5, characterized in that: An arched frame (25) is fixed between the upright plates (9) of the two flanges and welding components (8) and is mounted directly above the support base (6). A pressing cylinder (26) is fixed on the top surface of the crossbeam of the arched frame (25). The piston rod of the pressing cylinder (26) penetrates downward through the top wall of the arched frame (25) and a clamping block (27) is fixed on the extended end. The clamping block (27) is located directly above the support base (6), and an upper arc groove (28) is opened on the bottom surface of the clamping block (27).

7. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 6, characterized in that: The upper arc groove (28) and the lower arc groove (7) both fit with the outer cylindrical surface of the protective shell (2).

8. The welding device for welding a protective shell to the outside of a hydrogen-resistant steel cylinder according to claim 7, characterized in that: The welding device also includes a controller, which is electrically connected to the drive motor (22), feed cylinder (10), vertical cylinder (18), clamping cylinder (26) and laser welding equipment via signal lines.

9. A method for welding a protective shell to the outside of a hydrogen-resistant steel cylinder, using the welding apparatus for welding a protective shell to the outside of a hydrogen-resistant steel cylinder as described in claim 8, characterized in that: It includes the following steps: S1. The worker takes out a hydrogen-resistant steel cylinder (1) and a protective shell (2), ensuring that the length of the hydrogen-resistant steel cylinder (1) is greater than the length of the protective shell (2), and that the outer diameter of the hydrogen-resistant steel cylinder (1) is equal to the inner diameter of the protective shell (2). S2. The worker passes the hydrogen-resistant steel cylinder (1) through the inner hole of the protective shell (2) from right to left, and ensures that the protective shell (2) is in the middle of the hydrogen-resistant steel cylinder (1); S3. The worker places the protective shell (2) into the lower arc groove (7) of the support base (6) from top to bottom, and ensures that the protective shell (2) is in the middle of the support base (6). Since the lower arc groove (7) of the support base (6) matches the outer cylindrical surface of the protective shell (2), the protective shell (2) is positioned. At this time, the protective shell (2) is just below the upper arc groove (28) of the clamping block (27). At the same time, the hydrogen-resistant steel cylinder (1) is just between the annular groove (13) of the two flanged cylindrical heads (12) of the welding components (8). S4. Fix the protective shell (2): Control the piston rod of the pressing cylinder (26) to extend downward, and the piston rod drives the clamping block (27) to move downward. The upper arc groove (28) of the clamping block (27) moves towards the protective shell (2). When the piston rod of the pressing cylinder (26) is fully extended, the protective shell (2) is just fixed between the lower arc groove (7) of the support base (6) and the upper arc groove (28) of the clamping block (27), thereby fixing the protective shell (2). S5. The worker takes out two ring-shaped welding materials (29), puts the two ring-shaped welding materials (29) on the left and right ends of the hydrogen-resistant steel cylinder (1) respectively, and puts the two ring-shaped welding materials (29) against the left and right end faces of the protective shell (2) respectively. S6. The piston rods of the feed cylinders (10) of the two flange and welding components (8) extend simultaneously. The piston rods drive the fixed shaft (11) to move toward the hydrogen-resistant steel cylinder (1). The fixed shaft (11) drives the flange cylindrical head (12), heat-conducting block (14), power module (24), large gear (16), bending plate (17), vertical cylinder (18), welding head (20) and drive components on it to move synchronously. Among them, the annular groove (13) of the flange cylindrical head (12) of the right flange and welding component (8) moves toward the right end of the hydrogen-resistant steel cylinder (1). At the same time, the annular groove (13) of the flange cylindrical head (12) of the left flange and welding component (8) moves toward the left end of the hydrogen-resistant steel cylinder (1). When the piston rods of the feed cylinders (10) of the two flange and welding components (8) are fully extended, the right end of the hydrogen-resistant steel cylinder (1) engages with the annular groove (13) of the right flange and welding component (8) and forms an outward flange (30), which covers the right end of the annular weld (29) and the right end of the protective shell (2); at the same time, the left end of the hydrogen-resistant steel cylinder (1) engages with the annular groove (13) of the left flange and welding component (8) and forms an outward flange (30), which covers the left end of the annular weld (29) and the left end of the protective shell (2); S7. Turn on the power module (24). The power module (24) powers each heating rod (15) in the heat-conducting block (14). The heating rod (15) generates heat. The heat passes through the heat-conducting block (14), the flanged cylindrical head (12), and the outward flange (30) in sequence, and is finally transferred to the annular solder (29). The heated annular solder (29) welds the outward flange (30) to the protective shell (2). S8. The piston rods of the vertical cylinders (18) of the two flanges and welding components (8) are extended. The piston rods drive the bracket (19) to move upward, and the bracket (19) drives the welding head (20) to move upward. When the piston rods of the vertical cylinders (18) of the two flange and welding components (8) are fully extended, the welding head (20) of the right flange and welding component (8) is aligned with the contact seam between the right outward flange (30) and the protective shell (2), and at the same time, the welding head (20) of the left flange and welding component (8) is aligned with the contact seam between the left outward flange (30) and the protective shell (2). S9. Control the laser welding equipment to start, and the laser beam emitted by the welding head (20) irradiates the contact seam between the outward-turned part (30) and the protective shell (2) to start welding the contact seam; Then the drive motors (22) controlling the two flange and welding components (8) start simultaneously. The drive motors (22) drive the small gear (23) to rotate. The small gear (23) drives the large gear (16) to rotate around its own axis. The large gear (16) drives the large gear (16) to rotate around the axis of the fixed shaft (11). The large gear (16) also drives the bending plate (17) to rotate synchronously. The bending plate (17) drives the vertical cylinder (18) and the welding head (20) to rotate around the axis of the fixed shaft (11). The welding head (20) that is rotating gradually welds the contact seam. When the welding head (20) rotates 360°, the controller controls the laser welding equipment and the drive motor (22) to be turned off. At this time, a ring weld scar B (31) is formed between the right-side outward-turned part (30) and the protective shell (2). At the same time, a ring weld scar B (31) is formed between the left-side outward-turned part (30) and the protective shell (2), thus finally achieving the welding of a protective shell (2) on the outside of the hydrogen-resistant steel cylinder (1). S10. The specific steps for removing the hydrogen-resistant steel cylinder (1) with the welded protective shell (2) are as follows: S101, the piston rod of the vertical cylinder (18) controlling the flanging and welding assembly (8) retracts, and the piston rod drives the welding head (20) to reset; S102, control the piston rod of the clamping cylinder (26) to retract upward, the piston rod drives the clamping block (27) to move upward, so that the clamping block (27) is separated from the protective shell (2); S103, the piston rod of the feed cylinder (10) of the control flange and welding assembly (8) retracts, and the piston rod drives the fixed shaft (11) to move away from the hydrogen-resistant steel cylinder (1). The fixed shaft (11) drives the flange cylindrical head (12), heat-conducting block (14), power module (24), large gear (16), bending plate (17), vertical cylinder (18), welding head (20) and drive assembly on it to move synchronously. The annular groove (13) of the flange cylindrical head (12) of the flange and welding assembly (8) moves away from the hydrogen-resistant steel cylinder (1), and the flange cylindrical head (12) separates from the outer flange (30). S104. The worker removes the hydrogen-resistant steel cylinder (1) with the protective shell (2) welded on from the support (6); S11. Workers repeat steps S1 to S10 multiple times to weld a protective shell (2) onto the outside of each of the multiple hydrogen-resistant steel cylinders (1).

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