A welding device for welding double-end welded flanges of a hydrogen-resistant steel cylinder

Abstract

The application discloses a welding device for welding a flange plate on both ends of a hydrogen-resistant steel cylinder, and relates to the technical field of welding a flange plate on both ends of a hydrogen-resistant steel cylinder, which comprises a double-station welding assembly for simultaneously welding a flange plate on both ends of a hydrogen-resistant steel cylinder, and a locking assembly for locking the hydrogen-resistant steel cylinder and the two flange plates together; a support plate is fixed on the left end face of the upper and lower ends of a strip-shaped vertical plate; a bent rod is hingedly connected to the other end of each connecting rod; the middle part of the bent rod is hingedly connected to the corresponding support plate through a pin shaft; and a laser welding head is fixed on the other end of each bent rod. The application has the advantages that the efficiency of welding a flange plate on both ends of a hydrogen-resistant steel cylinder is greatly improved, and the welding quality of the hydrogen-resistant steel cylinder and the flange plate is greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of welding a flange at both ends of a hydrogen-resistant steel cylinder, and in particular to a welding device for welding flanges at both ends of a hydrogen-resistant steel cylinder. Background Technology

[0002] Hydrogen storage wells are buried underground and their function is to store liquid hydrogen. The 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 liquid hydrogen from seeping to the outside.

[0003] To facilitate the connection of multiple hydrogen-resistant steel cylinders together, the process requires welding a flange to both ends of the hydrogen-resistant cylinder. The existing welding method is as follows:

[0004] Sa, the worker took out a... Figures 1-2 The hydrogen-resistant steel cylinder 1 shown is cylindrical in shape; then the worker took out two... Figures 3-4 The flange 2 shown has a central hole 3 in the center and multiple through holes 4 evenly distributed on the outer edge of the flange 2.

[0005] Sb. The worker places a flange 2 flat on the workbench, and then inserts the lower end of the hydrogen-resistant steel cylinder 1 into the center hole 3 of the flange 2, as shown. Figure 5 As shown, the worker then aims the welding torch 5 of the welding equipment at the contact point between the hydrogen-resistant steel cylinder 1 and the flange 2, as shown. Figure 6 As shown;

[0006] Then, turn on the welding equipment and move the welding torch 5 around the hydrogen-resistant steel cylinder 1. After the welding torch 5 has circled the flange 2 once, an annular weld scar A6 will be formed between the flange 2 and the hydrogen-resistant steel cylinder 1. Figure 7 As shown, this allows a flange 2 to be welded to the bottom of the hydrogen-resistant steel cylinder 1.

[0007] By repeating step Sb once, the worker can weld another flange 2 to the top of the hydrogen-resistant steel cylinder 1, thus ultimately achieving the goal of welding a flange 2 to both ends of the hydrogen-resistant steel cylinder 1. Figure 8 As shown;

[0008] By repeating steps Sa~Sc multiple times, workers can weld two flanges 2 onto each batch of hydrogen-resistant steel cylinders 1.

[0009] However, although the existing methods can weld two flanges 2 onto the hydrogen-resistant steel cylinder 1, they still have the following technical drawbacks:

[0010] I. In steps Sb~Sc, a total of two welding processes are required to weld a flange 2 to both ends of a hydrogen-resistant steel cylinder 1. In other words, it takes a long time to weld a flange 2 to both ends of a hydrogen-resistant steel cylinder 1, thus reducing the efficiency of welding flange 2 to both ends of the hydrogen-resistant steel cylinder 1.

[0011] II. After two flanges 2 are welded onto the hydrogen-resistant steel cylinder 1, if the upper flange 2 is subjected to an external impact, the upper flange 2 will detach from the hydrogen-resistant steel cylinder 1 (because the circumferential weld scar A6 between the flange 2 and the hydrogen-resistant steel cylinder 1 is insufficient to resist the impact, thus the flange 2 will detach from the hydrogen-resistant steel cylinder 1). Therefore, the welding method of the prior art reduces the welding quality between the hydrogen-resistant steel cylinder 1 and the flange 2.

[0012] III. In steps Sb~Sc, since neither the flange 2 nor the hydrogen-resistant steel cylinder 1 is fixed, the thermal deformation generated during the welding process of the welding torch 5 welding the flange 2 to the hydrogen-resistant steel cylinder 1 will cause the flange 2 to deflect relative to the hydrogen-resistant steel cylinder 1. This results in the through hole 4 of the upper flange 2 being misaligned with the through hole 4 of the lower flange 2 (while the process requires that the through holes 4 of the two flanges 2 be vertically opposite each other after welding). Therefore, the welding method of the prior art further reduces the welding quality of the hydrogen-resistant steel cylinder 1 and the flange 2.

[0013] Therefore, there is an urgent need for a welding device that can greatly improve the efficiency of welding flanges at both ends of hydrogen-resistant steel cylinders and greatly improve the welding quality between hydrogen-resistant steel cylinders and flanges. Summary of the Invention

[0014] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compact welding device for welding flanges at both ends of a hydrogen-resistant steel cylinder.

[0015] The objective of this invention is achieved through the following technical solution: a welding device for welding flanges at both ends of a hydrogen-resistant steel cylinder, comprising a dual-station welding assembly for simultaneously welding a flange at both ends of the hydrogen-resistant steel cylinder, and a locking assembly for locking the hydrogen-resistant steel cylinder to the two flanges together.

[0016] The dual-station welding assembly includes an arched frame and a support fixed on a pad. A servo motor is fixed inside the arched frame. The output axis of the servo motor passes through the arched wall of the arched frame and is connected to a turntable at its extended end. A rectangular groove is formed on the top surface of the turntable.

[0017] A vertically oriented hydraulic cylinder is fixedly mounted on the top wall of the support. The piston rod of the vertical hydraulic cylinder penetrates downward through the top wall of the support and is connected to an L-plate at its extended end. A guide post is fixedly mounted on the right end face of the lower end of the L-plate. The guide post extends to the right and a strip-shaped vertical plate is fixedly mounted on its extended end. A support plate is fixedly mounted on the left end face of both the upper and lower ends of the strip-shaped vertical plate. Two lateral hydraulic cylinders are fixedly mounted on the left end face of the strip-shaped vertical plate, located above and below the guide post, respectively. A sliding plate sleeved on the guide post is fixedly mounted between the piston rods of the two lateral hydraulic cylinders. A connecting rod is hinged to the upper and lower ends of the sliding plate. A bent rod is hinged to the other end of each of the two connecting rods. The middle part of the bent rod is hinged to the corresponding support plate via a pin shaft. A laser welding head is fixedly mounted on the other end of each of the two bent rods.

[0018] The two support plates are symmetrical about the guide post, the two bending rods are symmetrical about the guide post, and the two lateral hydraulic cylinders are symmetrical about the guide post.

[0019] The sliding plate has a guide hole, which is fitted onto the guide post.

[0020] Both laser welding heads are connected to the laser welding equipment via wires. The two laser welding heads are symmetrical about the guide column, with the upper laser welding head positioned directly above the support plate and tilted downwards to the right.

[0021] The water portion of the L-plate is detachably fixed to the actuating end of the vertical cylinder piston rod.

[0022] The locking assembly includes a lifting plate and rods fixed on the top surface of the lifting plate and located at its left and right ends. Threaded holes are opened in the top surfaces of both rods, and annular bosses are fixed on the cylindrical surfaces of both rods. A locking block is fixed on the bottom surface of the lifting plate, and the outer contour of the locking block matches the rectangular groove of the turntable.

[0023] The welding device also includes a controller, which is electrically connected to the laser welding equipment, servo motor, vertical cylinder and two side cylinders via signal lines.

[0024] The present invention has the following advantages: it greatly improves the efficiency of welding flanges at both ends of the hydrogen-resistant steel cylinder and greatly improves the welding quality between the hydrogen-resistant steel cylinder and the flange. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a hydrogen-resistant steel cylinder structure.

[0026] Figure 2 for Figure 1 Main section diagram;

[0027] Figure 3 This is a schematic diagram of the flange structure;

[0028] Figure 4 for Figure 3 Main section diagram;

[0029] Figure 5 This is a schematic diagram showing the lower end of the hydrogen-resistant steel cylinder being inserted into the center hole of the flange.

[0030] Figure 6 A schematic diagram showing how to align the welding torch of the welding equipment with the contact point between the hydrogen-resistant steel cylinder and the flange.

[0031] Figure 7 A schematic diagram showing the formation of annular weld scar A between the flange and the hydrogen-resistant steel cylinder;

[0032] Figure 8 A schematic diagram of a structure for welding a flange to both ends of a hydrogen-resistant steel cylinder;

[0033] Figure 9 This is a schematic diagram of the structure of the dual-station welding assembly of the present invention;

[0034] Figure 10 for Figure 9 A schematic diagram of the partial cross-section;

[0035] Figure 11 for Figure 10 Enlarged view of part M;

[0036] Figure 12 This is a schematic diagram of the locking assembly of the present invention;

[0037] Figure 13 for Figure 12 K-direction diagram;

[0038] Figure 14 for Figure 12 Main section diagram;

[0039] Figure 15 A schematic diagram of a structure in which an annular groove is machined on the outer cylindrical surface at both the upper and lower ends of a hydrogen-resistant steel cylinder.

[0040] Figure 16 for Figure 15 Main section diagram;

[0041] Figure 17 This is a schematic diagram showing a flange supported on the top surface of a ring-shaped boss on a rod.

[0042] Figure 18 This is a schematic diagram showing the lower end of the hydrogen-resistant steel cylinder being inserted into the center hole of the flange from top to bottom;

[0043] Figure 19 A schematic diagram showing the center hole of the flange fitted onto the upper end of the hydrogen-resistant steel cylinder.

[0044] Figure 20 This is a schematic diagram showing two spacers respectively fitted onto the upper ends of two rods;

[0045] Figure 21 A schematic diagram showing the locking screw passing through the spacer and threadedly connected to the threaded hole of the rod;

[0046] Figure 22 A schematic diagram showing how the locking component's locking block is inserted from top to bottom into the rectangular groove of the turntable of the dual-station welding component;

[0047] Figure 23 This is a schematic diagram showing two laser welding heads positioned above and below the hydrogen-resistant steel cylinder, respectively.

[0048] Figure 24 for Figure 23 A magnified view of the V-shaped section;

[0049] Figure 25 This is a schematic diagram showing the laser welding head aligned with the contact point between the upper flange and the hydrogen-resistant steel cylinder.

[0050] Figure 26 This is a schematic diagram showing the annular weld scar B formed at the contact point between the upper flange and the hydrogen-resistant steel cylinder.

[0051] Figure 27 A schematic diagram showing workers lifting the hydrogen-resistant steel cylinder.

[0052] Figure 28 A schematic diagram of a hydrogen-resistant steel cylinder with two flanges for welding;

[0053] In the picture:

[0054] 1- Hydrogen-resistant steel cylinder, 2- Flange, 3- Center hole, 4- Through hole, 5- Welding torch, 6- Circumferential weld scar A;

[0055] 7-Dual-station welding assembly, 8-Locking assembly, 9-Backing plate, 10-Arch frame, 11-Bracket, 12-Servo motor, 13-Turntable, 14-Rectangular sinker, 15-Vertical cylinder, 16-L-plate, 17-Guide column, 18-Strip vertical plate, 19-Support plate, 20-Side cylinder, 21-Sliding plate, 22-Connecting rod, 23-Bending rod, 24-Pin, 25-Laser welding head;

[0056] 26-Lifting plate, 27-Ring, 28-Threaded hole, 29-Annular boss, 30-Catching block, 31-Annular groove, 32-Spacer, 33-Locking screw, 34-Annular weld scar B. Detailed Implementation

[0057] 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:

[0058] like Figures 9-14 As shown, a welding device for welding flanges at both ends of a hydrogen-resistant steel cylinder 1 includes a dual-station welding assembly 7 for simultaneously welding a flange 2 at both ends of the hydrogen-resistant steel cylinder 1, and a locking assembly 8 for locking the hydrogen-resistant steel cylinder 1 to the two flanges 2 together.

[0059] The dual-station welding assembly 7 includes an arched frame 10 and a support 11 fixed on a pad plate 9. A servo motor 12 is fixed inside the arched frame 10. The output axis of the servo motor 12 passes through the arched wall of the arched frame 10 and is connected to a turntable 13 at its extended end. A rectangular groove 14 is formed on the top surface of the turntable 13.

[0060] A vertically oriented hydraulic cylinder 15 is fixedly mounted on the top wall of the support 11. The piston rod of the vertical hydraulic cylinder 15 extends downward through the top wall of the support 11, and an L-plate 16 is connected to its extended end. The water portion of the L-plate 16 is detachably fixed to the actuating end of the piston rod of the vertical hydraulic cylinder 15. A guide post 17 is fixedly mounted on the right end face of the lower end of the L-plate 16. The guide post 17 extends to the right, and a strip-shaped vertical plate 18 is fixedly mounted on its extended end. A support plate 19 is fixedly mounted on the left end face of both the upper and lower ends of the strip-shaped vertical plate 18. Two branch supports are fixedly mounted on the left end face of the strip-shaped vertical plate 18. A lateral hydraulic cylinder 20 is located above and below the guide post 17. A sliding plate 21 is fixed between the piston rods of the two lateral hydraulic cylinders 20 and sleeved on the guide post 17. A guide hole is opened in the sliding plate 21 and sleeved on the guide post 17. A connecting rod 22 is hinged to the upper and lower ends of the sliding plate 21. A bent rod 23 is hinged to the other end of the two connecting rods 22. The middle part of the bent rod 23 is hinged to the corresponding support plate 19 via a pin 24. A laser welding head 25 is fixed to the other end of the two bent rods 23.

[0061] The two support plates 19 are symmetrical about the guide post 17, the two bending rods 23 are symmetrical about the guide post 17, and the two lateral hydraulic cylinders 20 are symmetrical about the guide post 17. Both laser welding heads 25 are connected to the laser welding equipment via wires. The two laser welding heads 25 are symmetrical about the guide post 17, with the upper laser welding head 25 positioned directly above the support plate 19 and tilted downwards to the right.

[0062] The locking assembly 8 includes a lifting plate 26 and rods 27 fixed on the top surface of the lifting plate 26 and located at its left and right ends. Threaded holes 28 are opened in the top surfaces of the two rods 27, and annular bosses 29 are fixed on the cylindrical surfaces of the two rods 27. A locking block 30 is fixed on the bottom surface of the lifting plate 26, and the outer contour of the locking block 30 matches the rectangular groove 14 of the turntable 13.

[0063] The welding device also includes a controller, which is electrically connected to the laser welding equipment, servo motor 12, vertical cylinder 15 and two side cylinders 20 via signal lines. The controller can control the start or stop of the laser welding equipment and servo motor 12, and at the same time, it can also control the extension or retraction of the piston rods of the vertical cylinder 15 and the two side cylinders 20, thereby facilitating the operation of the workers.

[0064] A method for welding flanges at both ends of a hydrogen-resistant steel cylinder, comprising the following steps:

[0065] S1. The locking assembly 8 is used to fix the hydrogen-resistant steel cylinder 1 and the two flanges 2 together. The specific operation steps are as follows:

[0066] S11. A worker takes out a hydrogen-resistant steel cylinder 1 and uses a CNC machine tool to cut an annular groove 31 on the outer cylindrical surface at both the upper and lower ends of the hydrogen-resistant steel cylinder 1. The structure of the hydrogen-resistant steel cylinder 1 with two annular grooves 31 is as follows. Figures 15-16 As shown;

[0067] S12, The worker takes out a... Figures 3-4 The flange 2 shown has its through holes 4 located on its left and right sides respectively fitted onto the two rods 27 of the locking assembly 8. The flange 2 is then supported on the top surface of the annular boss 29 of the rod 27. Figure 17 As shown;

[0068] S13. The worker inserts the lower end of the hydrogen-resistant steel cylinder 1 from top to bottom into the center hole 3 of the flange 2, as follows: Figure 18 As shown, at this time, the annular groove 31 located below the hydrogen-resistant steel cylinder 1 is exactly matched with the center hole 3 of the flange 2;

[0069] S14. The worker takes out another flange 2 and fits the through holes 4 on the left and right sides of the flange 2 onto the two rods 27 of the locking assembly 8, respectively. Then, the worker fits the center hole 3 of the flange 2 onto the upper end of the hydrogen-resistant steel cylinder 1, as shown. Figure 19 As shown, at this time, the annular groove 31 located above the hydrogen-resistant steel cylinder 1 is exactly matched with the center hole 3 of the flange 2;

[0070] S15. The worker takes out two spacers 32 and places them on the upper ends of the two rods 27 respectively. Figure 20As shown, at this time, both spacers 32 are supported on the top surface of the upper flange 2;

[0071] S16. The worker removes two locking screws 33, inserts the locking screws 33 through the spacer 32 and threads them into the threaded hole 28 of the rod 27, as follows: Figure 21 As shown, the spacer 32 is locked and fixed on the top surface of the upper flange 2. At this time, the lower flange 2, the hydrogen-resistant steel cylinder 1 and the upper flange 2 are all fixed between the annular boss 29 and the spacer 32, thus finally realizing the use of the locking assembly 8 to fix the hydrogen-resistant steel cylinder 1 and the two flanges 2 together.

[0072] S2. The worker lifts the lifting plate 26 of the locking assembly 8, and then inserts the locking block 30 of the locking assembly 8 from top to bottom into the rectangular recess 14 of the turntable 13 of the dual-station welding assembly 7, as follows. Figure 22 As shown, this enables the locking assembly 8 to be installed on the dual-station welding assembly 7. At this time, the hydrogen-resistant steel cylinder 1 and the two flanges 2, which are fixed on the locking assembly 8, are both in the welding position of the dual-station welding assembly 7.

[0073] S3. The piston rod of the vertical cylinder 15 of the dual-station welding assembly 7 extends downward, driving the L-plate 16 to move downward. The L-plate 16 drives the guide column 17, the strip-shaped vertical plate 18, the two side cylinders 20, the bending rod 23, and the laser welding head 25 to move synchronously towards the hydrogen-resistant steel cylinder 1. When the piston rod of the vertical cylinder 15 is fully extended, the two laser welding heads 25 are positioned above and below the hydrogen-resistant steel cylinder 1, respectively. Figures 23-24 As shown;

[0074] S4. The piston rods of the two lateral cylinders 20 of the dual-station welding assembly 7 extend to the left. The piston rods drive the sliding plate 21 to move to the left along the guide post 17. The sliding plate 21 drives the two connecting rods 22 to rotate synchronously. The upper connecting rod 22 drives the bent rod 23 connected to it to rotate clockwise around the pin 24. The bent rod 23 drives the laser welding head 25 connected to it to rotate synchronously. At the same time, the lower connecting rod 22 drives the bent rod 23 connected to it to rotate counterclockwise around the pin 24. The bent rod 23 drives the laser welding head 25 connected to it to rotate synchronously.

[0075] When the piston rods of the two lateral cylinders 20 are fully extended, the upper laser welding head 25 is aligned precisely with the contact point between the upper flange 2 and the hydrogen-resistant steel cylinder 1, as shown. Figure 25 As shown, simultaneously, the laser welding head 25 below is precisely aligned with the contact point between the lower flange 2 and the hydrogen-resistant steel cylinder 1, as... Figure 25 As shown;

[0076] S5. Control the laser welding equipment connected to the two laser welding heads 25 to start. At this time, the upper laser welding head 25 starts to weld the contact between the upper flange 2 and the hydrogen-resistant steel cylinder 1. At the same time, the lower laser welding head 25 starts to weld the contact between the lower flange 2 and the hydrogen-resistant steel cylinder 1.

[0077] S6. The servo motor 12 of the dual-station welding assembly 7 is started. The servo motor 12 drives the turntable 13 to rotate on the horizontal plane. The turntable 13 drives the clamping block 30 to rotate synchronously on the horizontal plane. The clamping block 30 drives the lifting plate 26 to rotate synchronously on the horizontal plane. The lifting plate 26 drives the hydrogen-resistant steel cylinder 1 and the two flanges 2 to rotate synchronously. The upper flange 2 rotates relative to the upper stationary laser welding head 25. At the same time, the lower flange 2 rotates corresponding to the lower stationary laser welding head 25.

[0078] After flange 2 rotates one revolution, the controller shuts down servo motor 12 and laser welding equipment. At this time, an annular weld scar B34 is formed at the contact point between flange 2 and hydrogen-resistant steel cylinder 1. Figure 26 As shown, and at the contact point between the lower flange 2 and the hydrogen-resistant steel cylinder 1, an annular weld scar B34 is formed, as shown. Figure 26 As shown, this ultimately resulted in the welding of a flange 2 to both ends of a hydrogen-resistant steel cylinder 1.

[0079] As can be seen from steps S4 to S6, the worker only needs to first control the piston rods of the two lateral cylinders 20 of the dual-station welding assembly 7 to extend to the left, so that the upper laser welding head 25 is aligned with the contact point between the upper flange 2 and the hydrogen-resistant steel cylinder 1, and at the same time, the lower laser welding head 25 is aligned with the contact point between the lower flange 2 and the hydrogen-resistant steel cylinder 1. Then, the worker controls the servo motor 12 of the dual-station welding assembly 7 to start, so that the upper flange 2 rotates relative to the upper stationary laser welding head 25, and at the same time, the lower flange 2 rotates correspondingly to the lower stationary laser welding head 25, so that a flange 2 can be welded to both ends of a hydrogen-resistant steel cylinder 1.

[0080] Therefore, it can be seen that this welding device is superior to... Figures 5-8 The welding method shown eliminates the need for workers to perform two welding processes to weld a flange 2 to both ends of the hydrogen-resistant steel cylinder 1. Instead, it allows for the simultaneous and automatic welding of two flanges 2 onto the hydrogen-resistant steel cylinder 1, thereby greatly saving welding time and significantly improving the efficiency of welding flanges 2 to both ends of the hydrogen-resistant steel cylinder 1.

[0081] S7. Remove the hydrogen-resistant steel cylinder 1 with two welded flanges 2. The specific operating steps are as follows:

[0082] S71. The worker controls the piston rods of the two lateral cylinders 20 of the dual-station welding assembly 7 to retract, so that the two laser welding heads 25 are reset; then the worker controls the piston rod of the vertical cylinder 15 to retract upward, the piston rod drives the L plate 16 to move upward, and the L plate 16 drives the guide column 17, the strip plate 18, the lateral cylinders 20 and the two laser welding heads 25 to move upward.

[0083] S72. The worker lifts the locking assembly 8 off the turntable 13 of the dual-station welding assembly 7 and places the locking block 30 of the locking assembly 8 flat on the ground.

[0084] S73. The worker unscrews the two locking screws 33, and then removes the spacer 32 from the rod 27; then the worker lifts the hydrogen-resistant steel cylinder 1, with the upper body facing upwards as follows: Figure 27 As indicated by the solid arrow, the hydrogen-resistant steel cylinder 1 with two welded flanges 2 is removed from the locking assembly 8, as shown. Figure 28 The diagram shows a schematic of a hydrogen-resistant steel cylinder 1 with two welded flanges 2.

[0085] S8. Workers repeat steps S1 to S7 multiple times to weld two flanges 2 onto each batch of hydrogen-resistant steel cylinders 1.

[0086] In step S1, since the lower flange 2, the hydrogen-resistant steel cylinder 1, and the upper flange 2 are all fixed between the annular boss 29 and the spacer 32, in step S6, the thermal deformation generated by the laser welding head 25 during the welding of the flange 2 to the hydrogen-resistant steel cylinder 1 will not cause the flange 2 to deflect relative to the hydrogen-resistant steel cylinder 1. This ensures that after welding, the through hole 4 of the upper flange 2 is vertically opposite to the through hole 4 of the lower flange 2, meeting the process requirements. Compared to... Figures 5-8 The welding method shown greatly improves the welding quality between the hydrogen-resistant steel cylinder 1 and the flange 2.

[0087] Furthermore, since the upper flange 2 is blocked by the annular groove 31 on the upper part of the hydrogen-resistant steel cylinder 1, when two flanges 2 are welded onto the hydrogen-resistant steel cylinder 1, if the upper flange 2 is subjected to an external impact force, the annular groove 31 on the upper part of the hydrogen-resistant steel cylinder 1 can resist this impact force, thereby effectively preventing the upper flange 2 from detaching from the hydrogen-resistant steel cylinder 1. Therefore, this welding device is superior to... Figures 5-8 The welding method shown further improves the welding quality between the hydrogen-resistant steel cylinder 1 and the flange 2.

Claims

1. A welding apparatus for welding flanges at both ends of a hydrogen-resistant steel cylinder, characterized in that: It includes a dual-station welding assembly (7) for simultaneously welding a flange (2) at both ends of the hydrogen-resistant steel cylinder (1) and a locking assembly (8) for locking the hydrogen-resistant steel cylinder (1) to the two flanges (2). The dual-station welding assembly (7) includes an arched frame (10) and a support (11) fixed on a pad (9). A servo motor (12) is fixed inside the arched frame (10). The output axis of the servo motor (12) passes through the arched wall of the arched frame (10) and a turntable (13) is connected to the extended end. A rectangular groove (14) is opened on the top surface of the turntable (13). A vertically arranged hydraulic cylinder (15) is fixed on the top wall of the bracket (11). The piston rod of the vertical hydraulic cylinder (15) passes through the top wall of the bracket (11) downward and is connected to an L plate (16) at the extended end. A guide post (17) is fixed on the right end face of the lower end of the L plate (16). The guide post (17) extends to the right and a strip-shaped vertical plate (18) is fixed on the extended end. A support plate (19) is fixed on the left end face of both the upper and lower ends of the strip plate (18). Two lateral cylinders (20) are fixed on the left end face of the strip plate (18) respectively located above and below the guide column (17). A sliding plate (21) sleeved on the guide column (17) is fixed between the piston rods of the two lateral cylinders (20). A connecting rod (22) is hinged to the upper and lower ends of the sliding plate (21). A bent rod (23) is hinged to the other end of the two connecting rods (22). The middle part of the bent rod (23) is hinged to the corresponding support plate (19) via a pin shaft (24). A laser welding head (25) is fixed on the other end of the two bent rods (23). The two support plates (19) are symmetrical about the guide column (17) vertically, the two bent rods (23) are symmetrical about the guide column (17) vertically, and the two lateral cylinders (20) are symmetrical about the guide column (17) vertically. Both laser welding heads (25) are connected to the laser welding equipment via wires. The two laser welding heads (25) are symmetrical about the guide column (17). The upper laser welding head (25) is located directly above the support plate (19) and is tilted to the right and downward. The locking assembly (8) includes a lifting plate (26) and rods (27) fixed on the top surface of the lifting plate (26) and located at its left and right ends. Threaded holes (28) are opened in the top surfaces of the two rods (27), and annular bosses (29) are fixed on the cylindrical surfaces of the two rods (27). A locking block (30) is fixed on the bottom surface of the lifting plate (26), and the outer contour of the locking block (30) matches the rectangular groove (14) of the turntable (13). The sliding plate (21) has a guide hole, which is sleeved on the guide post (17); the horizontal part of the L plate (16) is detachably fixed on the working end of the piston rod of the vertical cylinder (15).

2. The welding device for welding flanges at both ends of a hydrogen-resistant steel cylinder according to claim 1, characterized in that: The welding device also includes a controller, which is electrically connected to the laser welding equipment, servo motor (12), vertical cylinder (15) and two side cylinders (20) via signal lines.

Images