Welding equipment and welding method for P91 material

Abstract

The present invention belongs to the technical field of welding equipment, and in particular relates to welding equipment and a welding method for P91 material. The present invention comprises: a machine base; a pair of driving mechanisms fixedly mounted at both ends of the machine base, respectively used for driving two P91 material steel pipes to rotate; a fixing frame, on which a welding assembly is connected, and used for welding the two P91 material steel pipes; two guide plates, respectively fixedly mounted on the surfaces of the two P91 material steel pipes, and the shapes of the guide plates match the shapes of the interfaces of the P91 material steel pipes. The present invention fixes guide plates that match the shapes of the steel pipe interfaces on the steel pipes. During welding, as the steel pipe drives the guide plates to rotate, the welding assembly moves laterally along the steel pipe under the action of the guide plates, so that the welding gun is always in contact with the weld seam, thereby achieving the purpose of quickly welding the two steel pipes.

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 pipe installation. Before installation, some pipes need to be welded together to increase the length of a single pipe.

[0003] When welding pipes, existing welding equipment aligns the two ends of the steel pipe, then drives the steel pipe to rotate through a driving device, and welds the weld with a welding gun. However, this welding method is only suitable for steel pipe joints with circular surfaces. 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 response to the shortcomings of the existing technology, the present invention provides a welding device and a welding method for P91 material. By fixing a guide plate on the 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 solutions of the present invention are 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 the fixed frame, the slide rail surface is slidably connected to a slide seat, the slide seat is fixedly connected to a vertical frame, the vertical frame is installed with a lifting mechanism, the lifting mechanism is connected to a lifting seat, and the lifting seat is fixedly installed with a welding gun.

[0007] As a preferred technical solution of the present invention, a movable frame is connected under the slide seat, and 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, and a limiting groove is provided at the end of the clamping rod for cooperating with the guide piece, and a ball is connected to the inner wall of the limiting groove for contacting the surface of the guide piece.

[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, 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 stop block is provided on the bracket for limiting the connecting rod.

[0010] As an optimal 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 fixed blocks are fixedly connected to the inner side of the guide plate, and the fixed blocks are connected with locking bolts for fixing the guide plate on the surface of the P91 material steel pipe.

[0011] As an optimal 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 pressing frames are rotatably connected to the gear box, a second tension spring is fixedly connected between the two pressing frames, and a plurality of pressing wheels are rotatably connected to the pressing frames.

[0013] A welding method for P91 material, comprising the following steps:

[0014] S1: Place two P91 steel pipes on the drive mechanism and press them together with a pressing frame. Place guide plates with the same shape as the interfaces of the P91 steel pipes on the surfaces of the two P91 steel pipes, while keeping the guide plates parallel to the interfaces of the P91 steel pipes. Then align the interfaces of the two P91 steel pipes.

[0015] S2: Adjust the position of the welding assembly so that the guide pieces are connected to the limit slots on the clamping rods. Then move the guide pieces horizontally to drive the welding gun to move so that the welding gun is just facing the weld position. Finally, lock the guide pieces on the P91 steel pipe.

[0016] 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 movable frame and the slide to move horizontally, thereby driving the welding gun to always keep in contact with the weld, thereby quickly welding the two P91 steel pipes.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention fixes a guide piece on the steel pipe that matches the shape of the steel pipe interface. 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.

[0019] 2. The present invention fixes the guide piece on the steel pipe, and the welding assembly is connected to the two guide pieces, so that the welding assembly further plays a role in maintaining the alignment of the steel pipe interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a welding device for P91 material proposed in the present invention.

[0021] Figure 2 This is a schematic structural diagram of the welding assembly proposed in the present invention.

[0022] Figure 3 This is a schematic front view of the welding assembly proposed by the present invention.

[0023] Figure 4 This is a schematic structural diagram of the mobile rack proposed in the present invention.

[0024] Figure 5 This is a schematic structural diagram of the guide plate proposed in the present invention.

[0025] Figure 6 This is a schematic structural diagram of the driving mechanism proposed in the present invention.

[0026] 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. stop block; 5. guide plate; 51. through hole; 52. fixing block; 53. locking bolt. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0028] Example: This example discloses a welding device for P91 material, such as Figures 1-6 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 support 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, 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 a steel pipe with a bevel interface, the beveled guide piece 5 is installed; when welding the S-surface interface, the S-shaped guide piece 5 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.

[0029] like Figure 2-4 As shown, the welding assembly 4 includes a horizontally arranged slide rail 41, which is fixedly connected to the fixed frame 3. A slide seat 42 is slidably connected to the surface of the slide rail 41, and 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, and a lifting seat 46 is connected to the lifting mechanism 44. A welding gun 47 is fixedly installed on the lifting seat 46; a horizontally movable mobile frame 45 is connected to the bottom of the slide seat 42, and a pair of support rods 452 are movably connected to the two ends of the mobile frame 45. The support rods 452 can be retracted in the mobile 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 the end of the clamping rod 453 is provided with a limiting groove 454 that cooperates with the guide piece 5, and the end of the clamping rod 453 is connected to the position directly above the guide piece 5. The inner wall of the limiting groove 454 is connected to a ball 455 that contacts 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 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.

[0030] 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 will not deviate.

[0031] Preferably, a bracket 48 is fixedly connected to the bottom of 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 is provided on the bracket 48 for limiting the connecting rod 451; the movable frame 45 is configured to be rotatable, which is convenient for clamping the card rod 453 on the guide piece 5, facilitating the installation of the guide piece 5, and the restriction of the movable frame 45 by the first tension spring 49 and the stop block 410 makes the position of the card rod 453 stable, 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.

[0032] 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 for fixing the guide piece 5 on the surface of the P91 material steel pipe; the guide piece 5 is fixedly mounted 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.

[0033] like Figure 6 As shown, the driving mechanism 2 includes a gear box 21, a gear assembly is provided inside the gear box 21, a pair of driving wheels 22 are connected to the gear box 21, which are used to drive the P91 material steel pipe to rotate, and the two driving wheels 22 rotate in the same direction, and a driving motor 23 is installed on the gear box 21, and 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 circular motion during welding, thereby avoiding axial deviation of the steel pipe caused by the welding assembly 4.

[0034] This embodiment also discloses a welding method for P91 material, based on the above-mentioned welding equipment, comprising the following steps:

[0035] S1; Place two P91 steel pipes on the drive mechanism 2 and press them together with the pressing frame 24. Place the guide pieces 5 having the same shape as the P91 steel pipe interface on the surfaces of the two P91 steel pipes, while keeping the guide piece 5 parallel to the P91 steel pipe interface. Then align the two P91 steel pipe interfaces.

[0036] S2: Adjust the position of the welding assembly 4 so that the guide pieces 5 are connected to the limiting grooves 454 on the clamping rods 453, then move the guide pieces 5 laterally to move the welding gun 47 so that the welding gun 47 is just facing the weld position, and finally lock the guide pieces 5 to the P91 steel pipe.

[0037] S3: The lifting mechanism 44 drives the welding gun 47 to descend and weld the two P91 steel pipes. At the same time, the driving mechanism 2 drives the P91 steel pipe to rotate. When the P91 steel pipe rotates, it drives the guide plate 5 to rotate together. The ball 455 rolls along the surface track of the guide plate 5, driving the movable frame 45 and the slide 42 to move horizontally, thereby driving the welding gun 47 to always maintain contact with the weld, thereby quickly welding the two P91 steel pipes.

[0038] 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., indicating orientations or positional relationships, are 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 limiting the present invention.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection 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), respectively used to drive two P91 steel pipes to rotate; A fixing frame (3), to which a welding assembly (4) is connected, for welding two P91 steel pipes; Two guide pieces (5) are fixedly mounted on the surfaces of two P91 steel pipes, and the shape of the guide pieces (5) matches the shape of the interface of the P91 steel pipes; When the P91 steel pipe rotates, the welding assembly (4) moves along the surface of the guide plate (5) to weld the weld positions of the two P91 steel pipes; The welding assembly (4) includes a horizontally 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) is connected to a lifting seat (46), and a welding gun (47) is fixedly installed on the lifting seat (46); A movable frame (45) is connected below the slide seat (42), and a pair of supporting rods (452) are movably connected at both ends of the movable frame (45), and a clamping rod (453) is fixedly connected to the supporting rod (452), and 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) being threadedly connected between the two threaded tubes (456), and the threaded rod (457) can drive the two threaded tubes (456) to move in opposite directions when rotating. A bracket (48) is fixedly connected below the slide (42), 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 stopper (410) for limiting the connecting rod (451) is provided on the bracket (48); The driving mechanism (2) includes a gear box (21), a pair of driving wheels (22) connected to the gear box (21) for driving the P91 steel pipe to rotate, and a driving motor (23) installed on the gear box (21), for driving the driving wheels (22) to rotate; A pair of pressing frames (24) are rotatably connected to the gear box (21), a second tension spring (26) is fixedly connected between the two pressing frames (24), and a plurality of pressing wheels (25) are rotatably connected to the pressing frames (24).

2. The welding equipment for P91 material according to claim 1, 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.

3. A welding method for P91 material, using the welding device for P91 material according to claim 2, characterized in that: The following steps are involved: S1; Place two P91 steel pipes on the driving mechanism (2) and press them together with the pressing frame (24); Place 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 pipes; 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 rod (453), and then move the guide piece (5) horizontally to drive the welding gun (47) to move so that the welding gun (47) is just facing the welding seam position, and finally lock the guide piece (5) on the P91 material steel pipe; S3: The lifting mechanism (44) drives the welding gun (47) to descend and weld the two P91 steel pipes. At the same time, the driving mechanism (2) drives the P91 steel pipe to rotate. When the P91 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 (42) to move horizontally, thereby driving the welding gun (47) to always maintain contact with the weld, thereby quickly welding the two P91 steel pipes.

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