Welding equipment and welding method for P91 material

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to welding equipment and a welding method for a P91 material. The invention comprises: a base; a pair of driving mechanisms is fixedly installed at the two ends of the machine base and used for driving the two P91 material steel pipes to rotate correspondingly. The fixing frame is connected with a welding assembly and used for welding the two P91 material steel pipes; the two guide pieces are fixedly installed on the surfaces of the two P91 material steel pipes correspondingly, and the shapes of the guide pieces are matched with the shapes of the joints of the P91 material steel pipes; the guide pieces matched with the steel pipe connectors in shape are fixedly installed on the steel pipes, in the welding process, the steel pipes drive the guide pieces to rotate, the welding assembly transversely moves along the steel pipes under the action of the guide pieces, the welding gun makes contact with the weld joints all the time, and then the purpose of rapidly welding the two steel pipes is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to welding equipment and a welding method for P91 material. Background Art

[0002] When installing P91 steel pipes, pipe supports and hangers are required. There are many shapes and structures of pipe supports and hangers, such as U-shaped pipe racks, axial guide pipe racks, and axial limit brackets. Different support and hanger structures can be used to meet different needs to meet the load, displacement and constraint requirements of the pipe support. Pipe dampers, constant force spring supports and hangers, and variable spring supports and hangers are also used in conjunction with pipeline installation. Before installation, some pipelines need to be welded together to increase the length of a single pipeline.

[0003] When welding pipelines, existing welding equipment aligns the two ends of the steel pipe, then drives the steel pipe to rotate through a driving device, and the welding gun welds the weld. However, this welding method is only applicable to circular steel pipe joints. When the steel pipe joints are beveled, S-shaped or other irregular shapes, the position of the welding gun needs to be constantly adjusted during welding, which makes welding more troublesome. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a welding device and a welding method for P91 material. By fixing a guide plate on a steel pipe, the welding assembly can be driven to move automatically laterally, and the welding gun is always in contact with the weld, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a welding device for P91 material proposed by the present invention includes: a machine base; a pair of driving mechanisms are fixedly installed at both ends of the machine base, respectively used to drive two P91 material steel pipes to rotate; a fixed frame, on which a welding assembly is connected, used to weld two P91 material steel pipes; two guide plates, respectively fixedly installed on the surfaces of two P91 material steel pipes, and the shape of the guide plates is consistent with the shape of the interface of the P91 material steel pipe; when the P91 material steel pipe rotates, the welding assembly moves along the surface of the guide plate to weld the weld positions of the two P91 material steel pipes.

[0006] As a preferred technical solution of the present invention, the welding assembly includes a transversely arranged slide rail, the slide rail is fixedly connected to a fixed frame, a slide seat is slidably connected to the surface of the slide rail, a vertical frame is fixedly connected to the slide seat, a lifting mechanism is installed on the vertical frame, the lifting mechanism is connected to a lifting seat, and a welding gun is fixedly installed on the lifting seat.

[0007] As a preferred technical solution of the present invention, a movable frame is connected below the slide seat, a pair of support rods are movably connected at both ends of the movable frame, a clamping rod is fixedly connected to the support rod, a limiting groove cooperating with the guide piece is provided at the end of the clamping rod, and a ball in contact with the surface of the guide piece is connected to the inner wall of the limiting groove.

[0008] As a preferred technical solution of the present invention, a threaded tube is fixedly connected to the support rod, and a threaded rod is rotatably connected to the movable frame. The threaded rod is threadedly connected between the two threaded tubes, and when the threaded rod rotates, it can drive the two threaded tubes to move in opposite directions.

[0009] As a preferred technical solution of the present invention, a bracket is fixedly connected under the slide seat, a connecting rod hinged to the bracket is fixedly connected to the movable frame, and a first tension spring is fixedly connected between the connecting rod and the bracket, and a stopper for limiting the connecting rod is provided on the bracket.

[0010] As a preferred technical solution of the present invention, the guide plate is provided with a through hole passing through the P91 material steel pipe, and a plurality of fixing blocks are fixedly connected to the inner side of the guide plate, and the fixing blocks are connected with locking bolts for fixing the guide plate on the surface of the P91 material steel pipe.

[0011] As a preferred technical solution of the present invention, the driving mechanism includes a gear box, which is connected to a pair of driving wheels for driving the P91 material steel pipe to rotate, and a driving motor is installed on the gear box, which is used to drive the driving wheels to rotate.

[0012] As a preferred technical solution of the present invention, a pair of clamping frames are rotatably connected to the gear box, a second tension spring is fixedly connected between the two clamping frames, and a plurality of clamping wheels are rotatably connected to the clamping frames.

[0013] A welding method for P91 material, comprising the following steps: S1: Place two P91 steel pipes on the driving mechanism and press them with a pressing frame, and respectively sleeve guide plates with the same shape as the interface of the P91 steel pipe on the surfaces of the two P91 steel pipes, and keep the position of the guide plates parallel to the interface of the P91 steel pipe, and then align the interfaces of the two P91 steel pipes; S2: Adjust the position of the welding assembly so that the guide pieces are connected to the limit grooves on the clamping rods respectively, then move the guide pieces horizontally to drive the welding gun to move so that the welding gun is just facing the welding seam position, and finally lock and fix the guide pieces on the P91 steel pipe; S3: The lifting mechanism drives the welding gun to descend and weld the two P91 steel pipes. At the same time, the driving mechanism drives the P91 steel pipe to rotate. When the P91 steel pipe rotates, the guide plate is driven to rotate together. The ball rolls along the surface track of the guide plate, driving the moving frame and the slide seat to move horizontally, thereby driving the welding gun to always keep in contact with the weld, so as to quickly weld the two P91 steel pipes.

[0014] The beneficial effects of the present invention are: 1. The present invention fixes a guide piece that matches the shape of the steel pipe interface on the steel pipe. During welding, as the steel pipe drives the guide piece to rotate, the welding assembly moves laterally along the steel pipe under the action of the guide piece, so that the welding gun is always in contact with the weld, thereby achieving the purpose of quickly welding two steel pipes.

[0015] 2. The present invention fixes the guide plate on the steel pipe, and the welding assembly is connected to the two guide plates, so that the welding assembly further plays a role in maintaining the alignment of the steel pipe interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a welding device for P91 material proposed in the present invention.

[0017] Figure 2 This is a schematic structural diagram of the welding assembly proposed in the present invention.

[0018] Figure 3 It is a front view schematic diagram of the welding assembly proposed by the present invention.

[0019] Figure 4 This is a schematic structural diagram of the mobile rack proposed in the present invention.

[0020] Figure 5 This is a schematic structural diagram of the guide plate proposed in the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the driving mechanism proposed in the present invention.

[0022] In the figure: 1. base; 2. driving mechanism; 21. gear box; 22. driving wheel; 23. driving motor; 24. clamping frame; 25. clamping wheel; 26. second tension spring; 3. fixed frame; 4. welding assembly; 41. slide rail; 42. slide seat; 43. vertical frame; 44. lifting mechanism; 45. mobile frame; 451. connecting rod; 452. support rod; 453. clamping rod; 454. limiting groove; 455. ball bearing; 456. threaded pipe; 457. threaded rod; 46. lifting seat; 47. welding gun; 48. bracket; 49. first tension spring; 410. stopper; 5. guide plate; 51. through hole; 52. fixing block; 53. locking bolt. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment: This embodiment discloses a welding device for P91 material, such as Figure 1-Figure 6 As shown, it includes: a machine base 1; a pair of driving mechanisms 2 are fixedly installed at both ends of the machine base 1, which are respectively used to drive two P91 material steel pipes to rotate, and the machine base 1 is provided with a supporting base for supporting the P91 material steel pipe; a fixing frame 3, the fixing frame 3 is fixedly connected to the machine base 1, and a welding assembly 4 is connected to the fixing frame 3 for welding the two P91 material steel pipes; two guide pieces 5 are respectively fixedly installed on the surfaces of the two P91 material steel pipes, and the guide pieces 5 are parallel to the shape of the steel pipe interface when installed, wherein the shape of the guide pieces 5 is consistent with the shape of the P91 material steel pipe interface, when welding steel pipes with different interfaces, the guide pieces 5 of the corresponding shape are replaced, for example, when welding the steel pipe with an inclined interface, the guide piece 5 of the inclined surface is installed; when the S-surface interface is just welded, the guide piece 5 of the S shape is replaced, wherein the shape of the guide piece 5 can be formulated according to the shape of the steel pipe interface; wherein, when the driving mechanism 2 drives the P91 material steel pipe to rotate, the welding assembly 4 will move along the surface of the guide piece 5 to weld the weld positions of the two P91 material steel pipes.

[0025] like Figure 2-4 As shown, the welding assembly 4 includes a transversely arranged slide rail 41, the slide rail 41 is fixedly connected to the fixed frame 3, a slide seat 42 is slidably connected to the surface of the slide rail 41, a vertical frame 43 is fixedly connected to the slide seat 42, a lifting mechanism 44 is installed on the vertical frame 43, the lifting mechanism 44 adopts a cylinder, a lifting seat 46 is connected to the lifting mechanism 44, and a welding gun 47 is fixedly installed on the lifting seat 46; a horizontally movable moving frame 45 is connected below the slide seat 42, a pair of support rods 452 are movably connected at both ends of the moving frame 45, the support rods 452 can be retracted in the moving frame 45, and a clamping rod 453 is fixedly connected to the support rod 452. The clamping rod 453 has a Z-shaped structure, and a limiting groove 454 cooperating with the guide piece 5 is provided at the end of the clamping rod 453, and the end of the clamping rod 453 is connected to the position directly above the guide piece 5, and the inner wall of the limiting groove 454 is connected to a ball 455 in contact with the surface of the guide piece 5; when the steel pipe drives the guide piece 5 to rotate, the ball 455 rolls on the surface of the guide piece 5, thereby driving the movable frame 45 to move horizontally, driving the slide seat 42 to move on the slide rail 41, thereby driving the welding gun 47 to move horizontally to the left and right, so that the welding gun 47 is always facing the position of the welds of the two steel pipes, so that when the steel pipe rotates, the welding gun 47 will not deviate from the weld position.

[0026] Preferably, a threaded tube 456 is fixedly connected to the support rod 452, and a threaded rod 457 is rotatably connected to the outside of the movable frame 45, the threaded rod 457 is threadedly connected between the two threaded tubes 456, and when the threaded rod 457 rotates, it can drive the two threaded tubes 456 to move in opposite directions; by rotating the threaded rod 457, the spacing between the two clamping rods 453 can be adjusted to adapt to the distance between the two guide plates 5; and the clamping rod 453 is connected to the guide plate 5, and the guide plate 5 is fixedly installed on the surface of the steel pipe, so that when the two steel pipes rotate, the interface remains aligned and does not deviate.

[0027] Preferably, a bracket 48 is fixedly connected below the slide 42, and the bracket 48 is L-shaped, and a connecting rod 451 hinged to the bracket 48 is fixedly connected to the movable frame 45, and a first tension spring 49 is fixedly connected between the connecting rod 451 and the bracket 48, and a stop block 410 for limiting the connecting rod 451 is provided on the bracket 48; the movable frame 45 is configured to be rotatable, so that the card rod 453 can be conveniently clamped on the guide piece 5, which is convenient for the installation of the guide piece 5, and the position of the card rod 453 is stabilized by limiting the movable frame 45 by the first tension spring 49 and the stop block 410, and when the connecting rod 451 contacts the stop block 410, the guide piece 5 is just connected to the limiting groove 454 on the card rod 453, and the ball 455 contacts the guide piece 5 on both sides.

[0028] like Figure 5 As shown, the guide piece 5 is provided with a through hole 51 that passes through the P91 material steel pipe, and a plurality of fixing blocks 52 are fixedly connected to the inner side of the guide piece 5, and a locking bolt 53 is connected to the fixing block 52, which is used to fix the guide piece 5 on the surface of the P91 material steel pipe; the guide piece 5 is fixedly installed on the surface of the steel pipe by a plurality of locking bolts 53, which facilitates the installation and disassembly of the guide piece 5, and when the guide piece 5 rotates, the locking bolt 53 and the fixing block 52 will not cause obstruction to the clamping rod 453.

[0029] like Figure 6 As shown, the driving mechanism 2 includes a gear box 21, and a gear assembly is arranged inside the gear box 21. A pair of driving wheels 22 are connected to the gear box 21 for driving the P91 material steel pipe to rotate. The two driving wheels 22 rotate in the same direction, and a driving motor 23 is installed on the gear box 21. The driving motor 23 is used to drive the driving wheel 22 to rotate; a pair of clamping frames 24 are rotatably connected to the gear box 21, a second tension spring 26 is fixedly connected between the two clamping frames 24, and a plurality of clamping wheels 25 are rotatably connected to the clamping frames 24; the steel pipe is clamped and fixed by the clamping wheels 25, thereby ensuring the stability of the axial position of the steel pipe, so that the steel pipe only rotates in a circle during welding, thereby avoiding the axial deviation of the steel pipe caused by the welding assembly 4.

[0030] This embodiment also discloses a welding method for P91 material, based on the above-mentioned welding equipment, comprising the following steps: S1; Place two P91 steel pipes on the drive mechanism 2 and press them with the pressing frame 24, and respectively sleeve the guide pieces 5 having the same shape as the interface of the P91 steel pipe on the surfaces of the two P91 steel pipes, and keep the position of the guide pieces 5 parallel to the interface of the P91 steel pipe, and then align the interfaces of the two P91 steel pipes; S2: Adjust the position of the welding assembly 4 so that the guide pieces 5 are respectively connected to the limiting grooves 454 on the clamping rods 453, then move the guide pieces 5 laterally to drive the welding gun 47 to move so that the welding gun 47 is just facing the welding seam position, and finally lock and fix the guide pieces 5 on the P91 steel pipe; S3: The lifting mechanism 44 drives the welding gun 47 to descend to weld the two P91 material steel pipes. At the same time, the driving mechanism 2 drives the P91 material steel pipe to rotate. When the P91 material steel pipe rotates, the guide plate 5 is driven to rotate together. The ball 455 rolls along the surface track of the guide plate 5, driving the movable frame 45 and the slide seat 42 to move horizontally, thereby driving the welding gun 47 to always keep in contact with the weld, so as to quickly weld the two P91 material steel pipes.

[0031] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding device for P91 material, characterized in that: include: Machine base (1); A pair of driving mechanisms (2) are fixedly mounted at both ends of the machine base (1), and are used to drive two P91 steel pipes to rotate respectively; A fixing frame (3), to which a welding assembly (4) is connected, and is used for welding two P91 steel pipes; Two guide plates (5) are respectively fixedly mounted on the surfaces of two P91 steel pipes, and the shape of the guide plates (5) matches the shape of the interface of the P91 steel pipe; When the P91 steel pipe rotates, the welding assembly (4) moves along the surface of the guide plate (5) to weld the weld seams of the two P91 steel pipes; The welding assembly (4) comprises a transversely arranged slide rail (41), the slide rail (41) being fixedly connected to the fixed frame (3), a slide seat (42) being slidably connected to the surface of the slide rail (41), a vertical frame (43) being fixedly connected to the slide seat (42), a lifting mechanism (44) being installed on the vertical frame (43), a lifting seat (46) being connected to the lifting mechanism (44), and a welding gun (47) being fixedly installed on the lifting seat (46); A movable frame (45) is connected below the slide seat (42), a pair of supporting rods (452) are movably connected at both ends of the movable frame (45), a clamping rod (453) is fixedly connected to the supporting rod (452), a limiting groove (454) cooperating with the guide piece (5) is provided at the end of the clamping rod (453), and a ball (455) in contact with the surface of the guide piece (5) is connected to the inner wall of the limiting groove (454); The support rod (452) is fixedly connected to a threaded tube (456), and the movable frame (45) is rotatably connected to a threaded rod (457). The threaded rod (457) is threadedly connected between the two threaded tubes (456), and when the threaded rod (457) rotates, it can drive the two threaded tubes (456) to move in opposite directions.

2. A welding device for P91 material according to claim 1, characterized in that: A bracket (48) is fixedly connected below the slide seat (42), a connecting rod (451) hinged to the bracket (48) is fixedly connected to the movable frame (45), a first tension spring (49) is fixedly connected between the connecting rod (451) and the bracket (48), and a stopper (410) for limiting the position of the connecting rod (451) is provided on the bracket (48).

3. A welding device for P91 material according to claim 2, characterized in that: The guide piece (5) is provided with a through hole (51) passing through the P91 steel pipe, and a plurality of fixing blocks (52) are fixedly connected to the inner side of the guide piece (5), and the fixing blocks (52) are connected with locking bolts (53) for fixing the guide piece (5) on the surface of the P91 steel pipe.

4. A welding device for P91 material according to claim 3, characterized in that: The driving mechanism (2) comprises a gear box (21), a pair of driving wheels (22) being connected to the gear box (21) and being used to drive the P91 steel pipe to rotate, and a driving motor (23) being installed on the gear box (21), and being used to drive the driving wheels (22) to rotate.

5. A welding device for P91 material according to claim 4, characterized in that: A pair of clamping frames (24) are rotatably connected to the gear box (21), a second tension spring (26) is fixedly connected between the two clamping frames (24), and a plurality of clamping wheels (25) are rotatably connected to the clamping frames (24).

6. A welding method for P91 material, using a welding device for P91 material as claimed in claim 5, characterized in that: The following steps are involved: S1; placing two P91 steel pipes on the driving mechanism (2) and pressing them with the pressing frame (24), respectively sleeve guide pieces (5) having the same shape as the interface of the P91 steel pipe on the surfaces of the two P91 steel pipes, and keeping the position of the guide pieces (5) parallel to the interface of the P91 steel pipe, and then aligning the interfaces of the two P91 steel pipes; S2: adjusting the position of the welding assembly (4) so ​​that the guide pieces (5) are respectively connected to the limiting grooves (454) on the clamping rod (453), then moving the guide pieces (5) transversely to drive the welding gun (47) to move so that the welding gun (47) is just facing the welding seam position, and finally locking and fixing the guide pieces (5) on the P91 steel pipe; S3: The lifting mechanism (44) drives the welding gun (47) to descend, and the two P91 steel pipes are welded. At the same time, the driving mechanism (2) drives the P91 steel pipes to rotate. When the P91 steel pipes rotate, the guide plate (5) is driven to rotate together. The ball (455) rolls along the surface track of the guide plate (5), driving the moving frame (45) and the slide seat (42) to move horizontally, thereby driving the welding gun (47) to always keep in contact with the weld, so that the two P91 steel pipes can be quickly welded.

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