Pressure vessel flange connecting pipe assembly welding equipment

Abstract

The utility model discloses assembly welding equipment for a flange connecting pipe of a pressure vessel, which belongs to the technical field of pressure vessel manufacturing equipment and comprises a first workpiece clamping component fixedly arranged on a lathe bed and a second workpiece clamping component arranged on the lathe bed through a moving component, and the second workpiece clamping component can be close to or far away from the first workpiece clamping component. The first workpiece clamping assembly and the second workpiece clamping assembly each comprise a chuck fixing base, and a rotating chuck is installed on one side of each chuck fixing base. Three clamping jaws are arranged on the rotary chuck; the clamping jaws can move in the radial direction of the rotary chuck. The clamping jaw is driven by a first pneumatic motor; the rotary chucks are driven by a second pneumatic motor to rotate, and the center lines of the two rotary chucks are coaxial; the device further comprises a welding mechanism and a ground wire contact block. The welding mechanism is arranged corresponding to a welded junction of the flange and the connecting pipe. The ground wire contact block is arranged on a chuck fixing seat of the first workpiece clamping assembly; according to the utility model, the assembly precision can be improved, the clamping time can be shortened, and the processing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessel manufacturing equipment, in particular to a pressure vessel flange pipe assembly butt welding device. Background Art

[0002] A plurality of extended flanges and pipes are usually provided on the outer shell of a pressure vessel. During the manufacturing process of the pressure vessel, the extended flanges and the pipe assembly need to be welded. In the prior art, the welding of the extended flanges and the pipe assembly is generally completed by welding tooling. For example, Chinese utility model patent CN202022027998.8 discloses a point-fixed welding device for the pipe and flange assembly, wherein a bolt column is vertically fixed at the center of the upper surface of the base, and there are a lower frustum stop seat and an upper frustum stop seat, which are composed of a large circular surface and a small circular surface parallel to each other with a conical circumferential surface connected between them to form an outer contour, and a central through hole passing through the large circular surface and the small circular surface, the lower frustum stop seat is inserted into the bolt column through the central through hole and the large circular surface downward, and the large circular surface of the lower frustum stop seat is supported on the upper surface of the base; the upper frustum stop seat is also inserted into the bolt column through the central through hole and the small table surface downward, and is located on the upper part of the lower frustum stop seat, and a nut is screwed into the bolt column and is located on the upper part of the large circular surface of the upper frustum stop seat.

[0003] The welding device described in the above utility model patent uses the conical surfaces of the upper and lower cone stop seats to butt and position the pipe and flange. This structure has the following problems in actual use:

[0004] 1. When the conical surface is used to locate the flange and the connecting pipe, the flange and the connecting pipe are prone to deflection in actual operation, which makes the end faces of the two joints deflected and unable to align, and the assembly accuracy is low.

[0005] 2. When assembling and clamping, it is necessary to manually insert the flange to be welded onto the bolt column, then insert the pipe onto the bolt column, and then insert the upper cone stop seat onto the bolt column. The conical circumferential surface of the upper cone stop seat is supported on the upper pipe mouth of the pipe, and the nut is screwed onto the bolt column and close to the large circular surface of the upper cone stop seat. Manually observe whether the upper port of the flange and the lower pipe mouth of the pipe are aligned. If not, adjustment is required. After alignment, the screw nut is pressed against the large circular surface of the upper cone stop seat. The clamping process is complicated to operate, and the manual alignment efficiency is low, the clamping speed is slow, and the welding processing efficiency is low.

[0006] 3. After the above welding device completes the clamping of the flange and the pipe assembly, it is necessary to use independent welding equipment for welding, which further reduces the welding processing efficiency.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides a pressure vessel flange pipe assembly welding device, which can improve the assembly accuracy, shorten the time used for clamping, and improve the processing efficiency.

[0009] The utility model adopts the following technical scheme: a pressure vessel flange pipe assembly butt welding device, comprising a first workpiece clamping assembly and a second workpiece clamping assembly, wherein the first workpiece clamping assembly is fixedly arranged on a bed, and the second workpiece clamping assembly is arranged on the bed through a moving assembly, and the second workpiece clamping assembly can be close to or away from the first workpiece clamping assembly; the first workpiece clamping assembly and the second workpiece clamping assembly both comprise a chuck fixing seat, and a rotating chuck is installed on one side of the chuck fixing seat; three claws are arranged on the rotating chuck; the three claws can move radially along the rotating chuck; the claws are driven by a first pneumatic motor; the rotating chuck is driven to rotate by a second pneumatic motor, and the center lines of the rotating chucks of the first workpiece clamping assembly and the second workpiece clamping assembly are coaxial;

[0010] It also includes a welding mechanism, which is arranged corresponding to the welding joints of the flange and the pipe;

[0011] It also includes a ground wire contact block, which is arranged on the chuck fixing seat of the first workpiece clamping assembly and is in frictional contact with the rotating chuck.

[0012] Further, the chuck fixing seat of the first workpiece clamping assembly is fixed on the bed, and the chuck fixing seat of the second workpiece clamping assembly is fixed on the moving assembly;

[0013] The moving assembly comprises a carriage, a tightening cylinder and a linear guide rail arranged on the bed body, the carriage can be slidably arranged on the linear guide rail, the telescopic rod of the tightening cylinder is connected with the carriage, and the tightening cylinder is fixed on the bed body.

[0014] Furthermore, a gear ring is provided on the back of the rotary chuck, the gear ring is connected to a transmission gear, and the transmission gear is arranged on the output shaft of the second pneumatic motor.

[0015] Furthermore, the rotating chuck is provided with three sliding grooves evenly distributed along the circumferential direction, the sliding grooves extend radially along the rotating chuck, and the three claws can move along the three sliding grooves respectively.

[0016] Furthermore, the ground wire contact block comprises a friction block, one end of which is in friction contact with the back side of the rotating chuck.

[0017] Furthermore, the welding mechanism includes a welding gun, which is installed on an adjusting frame; the adjusting frame includes a vertical rod fixed to the bed, on which a connecting piece is movably installed, and the connecting piece is provided with a horizontal movable clamp and a vertical movable clamp, the vertical movable clamp is sleeved on the vertical rod and locked by bolts; the horizontal movable clamp is sleeved on the cross bar and locked by bolts; a welding gun clamp is provided at the end of the cross bar, and the welding gun is installed in the welding gun clamp and locked by bolts.

[0018] Furthermore, a bearing mounting hole for mounting a bearing is provided on the chuck fixing seat, and the axis of the bearing mounting hole is parallel to the linear guide rail; the axis of the bearing mounting holes of the two chuck fixing seats are coaxial.

[0019] Furthermore, the ground contact block further comprises a housing fixed on the chuck fixing seat of the first workpiece clamping assembly, and the friction block is slidably disposed in the housing;

[0020] A spring is also arranged in the shell, one end of the spring abuts against the chuck fixing seat, and the other end abuts against an end of the friction block away from the rotating chuck.

[0021] Furthermore, a center hole is opened in the middle of the rotating chuck, a lead screw is rotatably arranged in the slide slot, one end of the lead screw extends to the center hole and is fixedly provided with a driven bevel gear, the driven bevel gear and the active bevel gear are meshed and driven, and the active bevel gear is connected to the first pneumatic motor through a transmission shaft; a lead screw nut is threaded on the lead screw, and the clamping claw is fixedly mounted on the lead screw nut through a mounting frame;

[0022] Furthermore, the welding equipment also includes a main control box, and a plurality of control buttons are arranged on the control panel of the main control box.

[0023] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0024] 1. The utility model can shorten the time used for clamping, and the welding mechanism and the clamping and positioning mechanism are integrated together, which greatly improves the welding processing efficiency. The existing welding equipment takes an average of 30 minutes to complete each flange pipe combination welding, and after using this equipment, each time takes an average of 10 minutes; and the number of staff is greatly reduced, and the skill level requirements for the staff are greatly reduced, requiring the welding skill level of the staff to be reduced from the original technician level to the primary level, which plays a great role in alleviating the shortage of personnel in the industry

[0025] 2. The utility model improves the assembly accuracy of the flange and the connecting pipe. The concentricity of the flange and the connecting pipe can be guaranteed by the accuracy of the equipment itself. The combination of the flange and the connecting pipe processed by the equipment is easier to realize automatic processing when welding with the container.

[0026] 3. The utility model can shorten the assembly time and greatly shorten the ineffective start-up time of the welding machine. In the previous 30 minutes of working time, 6-7 minutes are effective welding time, and the welding machine and the smoke removal system will generate a certain amount of electricity during the remaining auxiliary time, which can save the electricity consumption during this time.

[0027] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 yes Figure 1 Middle AA section view;

[0030] Figure 3 yes Figure 1 Middle BB section view;

[0031] Figure 4 It is a top view of the utility model;

[0032] Figure 5 yes Figure 4 Middle CC section view;

[0033] Figure 6 yes Figure 5 Enlarged view of point D in the middle;

[0034] Figure 7 is a schematic diagram of the ground contact block;

[0035] Figure 8 is a schematic diagram of the control panel.

[0036] In the figure,

[0037] 1-bed, 2-rotating chuck, 3-gear ring, 4-first pneumatic motor, 5-welding gun, 6-adjusting frame, 61-vertical rod, 62-cross rod, 63-connecting piece, 64-welding gun clamp, 65-horizontal movable clamp, 66-vertical movable clamp, 7-slide plate, 8-linear guide, 9-tightening cylinder, 10-ground contact block, 11-chuck fixing seat, 12-friction block, 13-spring, 14-housing, 15-claw, 16-screw, 17-driven bevel gear, 18-driving bevel gear, 19-screw nut, 20-control panel, 21-second pneumatic motor. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. Example

[0039] like Figure 1-8As shown together, the utility model provides a pressure vessel flange pipe assembly welding device, including a bed 1, on which a clamping and positioning mechanism and a welding mechanism are arranged, the flange and the pipe are clamped by the clamping and positioning mechanism, and the interfaces of the two are butt-jointed to form a weld; the welding mechanism is arranged corresponding to the weld of the flange and the pipe, and the positioned flange and the pipe are welded together by the welding mechanism.

[0040] The clamping and positioning mechanism includes two workpiece clamping assemblies with the same structure, namely a first workpiece clamping assembly and a second workpiece clamping assembly, which can be used to clamp the flange and the connecting pipe respectively; the first workpiece clamping assembly is fixedly arranged on the bed 1, and the second workpiece clamping assembly is arranged on the bed 1 through a moving assembly so that the second workpiece clamping assembly is close to or away from the first workpiece clamping assembly, and the clamping centers of the first workpiece clamping assembly and the second workpiece clamping assembly are on the same straight line to ensure that the centers of the clamped flange and the connecting pipe are coaxial.

[0041] The workpiece clamping assembly includes a chuck fixing seat 11, on one side of which a rotating chuck 2 is rotatably mounted via a bearing. The rotating chuck 2 is provided with three claws 15, which can move radially along the rotating chuck 2 to achieve the opening and closing of the three claws, thereby loosening or clamping the workpiece.

[0042] The chuck fixing seat 11 of the first workpiece clamping assembly is fixed on the bed 1, and the chuck fixing seat 11 of the second workpiece clamping assembly is fixed on the moving assembly. The moving assembly includes a slide plate 7, a tightening cylinder 9 and a linear guide rail 8 arranged on the bed 1. The slide plate 7 can be slidably arranged on the linear guide rail 8, and the telescopic rod of the tightening cylinder 9 is connected to the slide plate 7. The tightening cylinder 9 is fixed on the bed 1. The tightening cylinder 9 is retracted and drives the second workpiece clamping assembly to move through the slide plate.

[0043] Furthermore, the center lines of the rotating chucks 2 of the first workpiece clamping assembly and the second workpiece clamping assembly are coaxial; specifically, the chuck fixing seat 11 is provided with a bearing mounting hole for mounting a bearing, and the axis line of the bearing mounting hole is parallel to the linear guide 8 to ensure the accuracy during welding of the workpiece assembly. At the same time, the use of the linear guide can ensure that the centers of the two rotating chucks 2 are coaxial when the second workpiece clamping assembly is moved; the axis lines of the bearing mounting holes of the two chuck fixing seats 11 are coaxial to ensure that the centers of the two rotating chucks 2 are coaxial.

[0044] The welding equipment also includes a ground contact block. When the welding machine starts welding, the ground contact block is responsible for connecting the welding circuit. The ground contact block is arranged on the chuck fixing seat 11 of the first workpiece clamping assembly. The ground contact block includes a friction block 12. One end of the friction block 12 is in friction contact with the back of the rotating chuck 2. Further, the ground contact block also includes a shell 14 fixed on the chuck fixing seat 11 of the first workpiece clamping assembly. The friction block 12 is slidably arranged in the shell 14. A spring 13 is also arranged in the shell 14. One end of the spring 13 abuts on the chuck fixing seat 11, and the other end abuts on the end of the friction block 12 away from the rotating chuck 2. The action of the spring 13 ensures that the friction block 12 is always in contact with the back of the rotating chuck 2.

[0045] Furthermore, the rotating chuck 2 is provided with three circumferentially evenly distributed slide grooves, the slide grooves extend radially along the rotating chuck 2, and the three claws 15 can move along the three slide grooves respectively; further, a center hole is opened in the middle of the rotating chuck 2, and a lead screw 16 is rotatably arranged in the slide groove, one end of the lead screw 16 extends to the center hole and is fixed with a driven bevel gear 17, the driven bevel gear 17 and the active bevel gear 18 are meshed for transmission, and the active bevel gear 16 is connected to the driving member through a transmission shaft, and the driving member can be an electric motor or a first pneumatic motor 4, preferably a first pneumatic motor 4; a lead screw nut 19 is threaded on the lead screw 16, and the claws 15 are fixedly mounted on the lead screw nut 19 through a mounting frame.

[0046] Furthermore, the lead screw 16 is mounted on the rotary chuck 2 via a slewing bearing.

[0047] The welding equipment also includes a main control box, and a plurality of control buttons are arranged on the control panel 20 of the main control box, including start, stop, left tighten, left loose, right tighten, right loose, push and retreat. When the flange or pipe needs to be installed, press the left loose or right loose button on the control panel 20, and the claw 15 on the rotating chuck 2 will be moved outward by the first pneumatic motor 4 to loosen the flange or pipe; when the left tighten or right tighten button is pressed, the claw 15 is driven by the first pneumatic motor 4 to move inward to lock the flange or pipe. When the second workpiece clamping assembly needs to be moved, press the push or retreat button; the start or stop button is used to start and shut down the equipment.

[0048] The back of the rotary chuck 2 is provided with a gear ring 3, which is connected to a transmission gear, which is arranged on the output shaft of a driving device 21 to drive the rotary chuck 2 to rotate; the driving device is mounted on the bed 1 through a fixed seat. Specifically, the driving device can be an electric motor or a second pneumatic motor 21.

[0049] Furthermore, when a motor is used as the driving member for driving the jaw 15 to move and the driving device for driving the rotating chuck 2 to rotate, the motor needs to be insulated from the transmission gear and the fixed seat, and an insulating device needs to be provided to prevent current interference during welding from causing damage to the motor. In this embodiment, the driving member and the driving device preferably use a pneumatic motor, and there is no need to consider the interference between the welding current and the motor, and no insulating device needs to be provided.

[0050] The welding mechanism includes a welding gun 5, which is mounted on an adjustment frame 6. The adjustment frame 6 can adjust the upper and lower positions and the front and rear positions of the welding gun 5. The adjustment frame 6 includes a vertical rod 61, which is fixed on the bed 1. A connecting member 63 can be movably mounted on the vertical rod 61. The connecting member 63 is provided with a horizontal movable clamp 65 and a vertical movable clamp 66. The vertical movable clamp 66 is sleeved on the vertical rod 61 and locked by bolts; the horizontal movable clamp 65 is sleeved on the cross bar 62 and locked by bolts; a welding gun clamp 64 is provided at the end of the cross bar 62, and the welding gun 5 is installed in the welding gun clamp 64 and locked by bolts. When it is necessary to adjust the welding position, the bolts on the welding gun clamp 64 can be loosened to adjust the welding gun 5, or it can be adjusted alone or in combination with the horizontal movable clamp 65 and the vertical movable clamp 66. In actual production, the adjustment method is selected according to the working conditions. By setting the adjustment frame 6, the welding gun can be fixed at a preset position during welding, so that the positions of the welding gun and the weld port are relatively fixed, thereby improving welding stability; and the position of the welding gun can be adjusted according to working conditions, with strong adaptability.

[0051] Working principle of this utility model:

[0052] During operation, the rotating chucks of the first workpiece clamping assembly and the second workpiece clamping assembly clamp the flange and the connecting pipe respectively, and the tightening cylinder extends to push the second workpiece clamping assembly toward the first workpiece clamping assembly, so that the connecting pipe and the flange are butted to form an interface, and then the position of the welding gun is adjusted so that it is opposite to the weld port. After completion, welding can be carried out.

[0053] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A pressure vessel flange pipe assembly welding device, characterized in that: The invention comprises a first workpiece clamping assembly and a second workpiece clamping assembly, wherein the first workpiece clamping assembly is fixedly mounted on a bed (1), and the second workpiece clamping assembly is arranged on the bed (1) via a moving assembly, and the second workpiece clamping assembly can be moved close to or away from the first workpiece clamping assembly; the first workpiece clamping assembly and the second workpiece clamping assembly both comprise a chuck fixing seat (11), and a rotating chuck (2) is mounted on one side of the chuck fixing seat (11); three clamping claws (15) are arranged on the rotating chuck (2); the three clamping claws (15) can move radially along the rotating chuck (2); the clamping claws (15) are driven by a first pneumatic motor (4); the rotating chuck (2) is driven to rotate by a second pneumatic motor (21), and the center lines of the rotating chucks (2) of the first workpiece clamping assembly and the second workpiece clamping assembly are coaxial; It also includes a welding mechanism, which is arranged corresponding to the welding joints of the flange and the pipe; It also comprises a ground contact block, which is arranged on a chuck fixing seat (11) of the first workpiece clamping assembly, and the ground contact block is in frictional contact with the rotating chuck (2).

2. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The chuck fixing seat (11) of the first workpiece clamping assembly is fixed on the bed (1), and the chuck fixing seat (11) of the second workpiece clamping assembly is fixed on the moving assembly; The moving assembly comprises a carriage (7), a tightening cylinder (9) and a linear guide rail (8) arranged on the bed (1); the carriage (7) is slidably arranged on the linear guide rail (8); a telescopic rod of the tightening cylinder (9) is connected to the carriage (7); and the tightening cylinder (9) is fixed on the bed (1).

3. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: A gear ring (3) is provided on the back of the rotary chuck (2), and the gear ring (3) is connected to a transmission gear, which is arranged on the output shaft of the second pneumatic motor.

4. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The rotary chuck (2) is provided with three sliding grooves evenly distributed along the circumferential direction, the sliding grooves extending radially along the rotary chuck (2), and the three claws (15) can move along the three sliding grooves respectively.

5. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The ground wire contact block comprises a friction block (12), one end of the friction block (12) being in friction contact with the back side of the rotating chuck (2).

6. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The welding mechanism comprises a welding gun (5), wherein the welding gun (5) is mounted on an adjustment frame (6); the adjustment frame (6) comprises a vertical rod (61) fixed to a bed, a connecting piece (63) being movably mounted on the vertical rod (61), a horizontal movable clamp (65) and a vertical movable clamp (66) being provided on the connecting piece (63), the vertical movable clamp (66) being sleeved on the vertical rod (61) and locked by bolts; the horizontal movable clamp (65) being sleeved on the cross rod (62) and locked by bolts; a welding gun clamp (64) being provided at the end of the cross rod (62), the welding gun (5) being mounted in the welding gun clamp (64) and locked by bolts.

7. A pressure vessel flange pipe assembly welding device as claimed in claim 2, characterized in that: The chuck fixing seat (11) is provided with a bearing mounting hole for mounting a bearing, and the axis of the bearing mounting hole is parallel to the linear guide rail (8); the axis of the bearing mounting holes of the two chuck fixing seats (11) are coaxial.

8. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The ground contact block further comprises a housing (14) fixed on a chuck fixing seat (11) of the first workpiece clamping assembly, and the friction block (12) is slidably disposed in the housing (14); A spring (13) is also disposed in the housing (14), one end of the spring (13) abuts against the chuck fixing seat (11), and the other end abuts against an end of the friction block (12) away from the rotating chuck (2).

9. A pressure vessel flange pipe assembly welding device as claimed in claim 4, characterized in that: A central hole is provided in the middle of the rotary chuck (2), a lead screw (16) is rotatably arranged in the slide groove, one end of the lead screw (16) extends to the central hole and is fixedly provided with a driven bevel gear (17), the driven bevel gear (17) and the driving bevel gear (18) are meshed for transmission, and the driving bevel gear (18) is connected to the first pneumatic motor through a transmission shaft; a lead screw nut (19) is threadedly connected to the lead screw (16), and the clamping claw (15) is fixedly mounted on the lead screw nut (19) through a mounting frame.

10. A pressure vessel flange pipe assembly welding device as claimed in claim 1, characterized in that: The welding equipment further comprises a main control box, and a control panel (20) of the main control box is provided with a plurality of control buttons.

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