A laser cleaning device for welded steel pipe machining

Abstract

The application discloses a kind of laser cleaning equipment for welded steel pipe processing, including laser cleaning workstation, laser cleaning workstation is installed the steel pipe conveying rotator, two groups the steel pipe conveying rotator between being equipped with steel pipe outer cleaning device, steel pipe outer cleaning device is installed on laser cleaning workstation, the side of laser cleaning workstation is equipped with laser cleaning device, laser cleaning device is connected with steel pipe outer cleaning device and steel pipe inner cleaning device, laser cleaning workstation is installed with steel pipe inner cleaning device, steel pipe inner cleaning device is made of steel pipe inner laser mechanism and self-centering moving frame.The present application is horizontal laser cleaning equipment, can simultaneously to the inner and outer weld of steel pipe or surface do laser cleaning processing, can simultaneously drive steel pipe transmission and rotary motion, can comprehensively to the inner and outer surface of steel pipe do laser cleaning processing, reduce the percentage of defective of processing treatment, reduce the difficulty of subsequent quality inspection, in addition, maximum limit improves the stability of steel pipe transmission and cleaning processing effect.

Description

Technical Field

[0001] This invention relates to the field of laser cleaning devices for steel pipe welding, specifically a laser cleaning device for processing welded steel pipes. Background Technology

[0002] With the development of technology, people are paying more and more attention to their quality of life and their awareness of environmental protection is also getting stronger. Traditional cleaning methods, such as mechanical cleaning, chemical cleaning, and ultrasonic cleaning, can no longer meet people's needs. People have begun to seek new cleaning methods that are neither harmful to health nor polluting to the environment. As a result, laser cleaning machines have emerged.

[0003] Laser cleaning technology refers to the process of using a high-energy laser beam to irradiate the surface of a workpiece, causing the surface dirt, rust, or coatings to evaporate or peel off instantly, thus quickly and effectively removing the adhering substances or coatings from the surface of the object being cleaned, achieving a clean result. Laser cleaning is a new, efficient, and environmentally friendly cleaning technology, based on the interaction effect between laser and matter. Unlike traditional mechanical cleaning, chemical cleaning, and ultrasonic cleaning (wet cleaning processes), it does not require any ozone-depleting CFC organic solvents, is pollution-free, noise-free, and harmless to humans and the environment, making it a "green" cleaning technology that is gradually replacing traditional cleaning processes in many fields. In simple terms, the principle of laser rust removal is to use a 1064nm wavelength laser specifically designed for cleaning, generated by an Nd:YAG solid-state laser. The high-frequency vibrations (up to 1000 vibrations per second) break up the rust layer; the instantaneous high temperature generated by the laser causes the rust layer to peel off from the substrate surface, thereby achieving the purpose of rust removal.

[0004] Laser cleaning does not damage the substrate surface, nor does it alter the substrate's physical characteristics, achieving true substrate-free cleaning. Laser rust removal uses lasers with a certain peak power and single-pulse energy. When the laser contacts the work surface, it can be imagined as small energy balls striking it sequentially. The rust absorbs the energy, and due to the short contact time, the surface rust instantly vaporizes upon absorbing the energy. Since it cannot conduct heat downwards, the surface rust disappears instantly without damaging the workpiece. Using a mirror to transform the laser into a line laser results in a faster processing speed.

[0005] Traditional laser cleaning equipment is handheld and primarily uses a laser gun to burn away metal surfaces such as rust and paint, while utilizing the reflective properties of metal to ensure the parts themselves are not damaged. This new laser cleaning machine works on the principle that when rust is exposed to high temperatures, it evaporates instantly. After plasma separation, the underlying metal's high reflectivity prevents damage to the rust-removed areas even when exposed to the laser. Therefore, this laser cleaning method is effective and safe, and can even perfectly clean the corners of parts such as letters and bolts. Thus, it can easily handle rust, no matter how difficult it is to remove. Wherever the light can reach, the rust has nowhere to hide.

[0006] However, existing handheld laser cleaning equipment requires operators to hold the laser gun head while working. If the laser gun head slips from the hand, the laser emitted may shine on nearby workers, posing an unpredictable safety hazard. Furthermore, when laser cleaning welds on steel pipes, operators can only clean the external welds, not the internal ones simultaneously, resulting in lower overall cleaning efficiency. Secondly, laser cleaning the internal welds requires extremely high hand stability due to the handheld nature of the laser gun. The limited length of the human hand also limits the ability to clean welds deep within the pipe, presenting significant limitations. Additionally, the interior of a steel pipe cannot be fully observed by the naked eye, leading to frequent oversights and hindering effective control of defective products. Subsequent inspection of defective pipes becomes difficult, making it easy for pipes with minor defects to be shipped out.

[0007] Therefore, it is essential to invent a laser cleaning device for processing welded steel pipes. Summary of the Invention

[0008] The purpose of this invention is to provide a laser cleaning equipment for processing welded steel pipes. The invention provides the following technical solution: it includes a laser cleaning worktable, a steel pipe conveying rotary device, an external steel pipe cleaner, an internal steel pipe cleaner, and a laser cleaner. Two sets of the steel pipe conveying rotary devices are fixedly installed on the laser cleaning worktable, with at least three of the steel pipe conveying rotary devices forming a group. An external steel pipe cleaner is arranged between the two sets of steel pipe conveying rotary devices. The external steel pipe cleaner is fixedly installed on the laser cleaning worktable. A laser cleaner is arranged on one side of the laser cleaning worktable. The laser cleaner is connected to the external steel pipe cleaner and the internal steel pipe cleaner via optical fiber. An internal steel pipe cleaner is fixedly installed on the laser cleaning worktable. The internal steel pipe cleaner consists of an internal laser mechanism and a self-centering moving frame.

[0009] The steel pipe conveying rotary device includes a conveying base, a conveying slot, a conveying roller, a conveying motor, a locking claw, a locking motor, a rotating slot, a rotating roller, and a rotating motor. The conveying base is fixedly installed on the laser cleaning workbench. A conveying slot is opened in the upper middle of the conveying base. A conveying roller is rotatably installed inside the conveying slot. One end of the conveying roller rotatably passes through the conveying base and is fixedly connected to the output end of the conveying motor. The conveying motor is fixedly installed on the conveying base. A locking motor is fixedly installed on the conveying base. The output end of the locking motor is rotatably installed on the conveying base. One end of the locking claw is fixedly connected to the output end of the locking motor. A rotating slot is opened in the middle of the locking claw. A rotating roller is rotatably installed inside the rotating slot. One end of the rotating roller rotatably passes through the locking claw and is fixedly connected to the output end of the rotating motor. The rotating motor is fixedly installed on one side of the locking claw. There are two locking claws.

[0010] The steel pipe cleaning device includes a suspended base, a fixed horizontal shaft, a self-centering base, an inner laser gun head, a front contact plate, horizontal side plates, a roller assembly, a rear connecting plate, a rear support spring, and an upper support spring. The suspended base is fixedly installed above the laser cleaning workbench. One end of the suspended base is fixedly connected to the fixed horizontal shaft, and the other end of the fixed horizontal shaft is fixedly connected to one end surface of the self-centering base. The inner laser gun head is fixedly installed on the other end surface of the self-centering base. One end of the surface of the self-centering base is rotatably connected to one end of the front contact plate, and the other end of the front contact plate is rotatably connected to one end of the two horizontal side plates. A roller assembly is rotatably installed between the two horizontal side plates. The other end of the horizontal side plates is rotatably connected to one end of the rear connecting plate, and the other end of the rear connecting plate is rotatably connected to the middle of the surface of the self-centering base. The rear connecting plate is elastically connected to the self-centering base through the rear support spring, and the rear connecting plate is also elastically connected to the horizontal side plates through the upper support spring.

[0011] Preferably, the steel pipe external cleaner includes a cleaning bracket, a vacuum pump, an external laser gun head, and a universal tube. The cleaning bracket is fixedly installed on the laser cleaning workbench, and a vacuum pump is fixedly installed on the cleaning bracket. An external laser gun head is fixedly installed on one side of the cleaning bracket, and a universal tube is provided above the external laser gun head. The universal tube is fixedly connected to the cleaning bracket and they are interconnected.

[0012] Preferably, the cleaning bracket is an inverted 'U'-shaped hollow structure. A processing door is installed on the cleaning bracket, and the hollow cavity of the cleaning bracket is connected to a universal tube. A self-centering base and an inner laser gun head are provided on the lower inner side of the cleaning bracket. The inner laser gun head and the outer laser gun head are connected to the laser cleaner through optical fibers. The angle between the laser emitted by the inner laser gun head and the outer laser gun head and the surface of the steel pipe is an acute angle.

[0013] Preferably, the upper part of the conveying roller protrudes from the conveying slot and comes into contact with the surface of the steel pipe, and the surface of the steel pipe also comes into contact with the rotating roller.

[0014] Preferably, the locking claw has an arc-shaped structure, and the locking claw is respectively positioned on both sides of the conveyor base.

[0015] Preferably, the self-centering base is a hexagonal structure with six surfaces, on which a self-centering movable frame is rotatably mounted, and there are six self-centering movable frames.

[0016] Preferably, the self-centering moving frame is composed of the front contact plate, horizontal side plate, rolling wheel group, rear connecting plate, rear support spring and upper support spring, and the steel pipe laser machine is composed of a suspended base, fixed horizontal axis, self-centering base and inner laser gun head.

[0017] Preferably, the self-centering moving frame has an overall trapezoidal structure, and the rolling wheel assembly of the self-centering moving frame makes rolling contact with the inner wall of the steel pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This invention is a horizontal laser cleaning device rather than a handheld one, eliminating the need for manual operation and maximizing the stability of laser cleaning while minimizing overall safety hazards. Furthermore, both the external and internal steel pipe cleaners are equipped with laser guns, allowing for simultaneous laser cleaning of the internal and external welds or surfaces of the steel pipe, thus maximizing the efficiency of laser cleaning.

[0020] 2. The steel pipe conveying rotary device of the present invention is a steel pipe conveying mechanism. This device can drive the steel pipe to rotate while conveying it, allowing for comprehensive laser cleaning of both the inner and outer surfaces of the steel pipe during the laser cleaning operation performed by the outer and inner cleaning devices. This ensures efficient subsequent transport of liquid media, reduces the defect rate, and lowers the difficulty of subsequent quality inspection. Furthermore, because the steel pipe conveying rotary device locks and restricts the steel pipe during rotation, it effectively prevents vibration or displacement caused by external factors, thus preventing interference with the laser cleaning operations of the outer and inner cleaning devices and maximizing the stability of the steel pipe conveying and the cleaning effect.

[0021] 3. The steel pipe cleaning device of the present invention consists of an internal laser mechanism and a self-centering moving frame. Because the internal laser mechanism of the steel pipe cleaning device is rigidly mounted on a suspended base, it can avoid swaying due to external influences and prevent unnecessary collisions with the inner wall of the steel pipe.

[0022] 4. The self-centering moving frame of the steel pipe cleaning device of the present invention is a linkage mechanism, which can be applied to steel pipes of various sizes. Because the self-centering moving frame rolls in contact with the inner wall of the steel pipe, it can effectively and autonomously perform self-centering, which can stabilize the conveying of the steel pipe to a certain extent and avoid affecting the normal conveying operation of the steel pipe. Attached Figure Description

[0023] Figure 1 This is a side view of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the steel pipe cleaning device of the present invention.

[0025] Figure 3 This is a schematic diagram of the steel pipe conveying rotary device of the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of the steel pipe external cleaning device of the present invention.

[0027] Figure 5 This is the present invention. Figure 2 A magnified schematic diagram of the structure at point A.

[0028] In the picture:

[0029] Laser cleaning workbench 1, steel pipe conveyor rotary 2, conveyor base 21, conveyor slot 22, conveyor roller 23, conveyor motor 24, locking claw 25, locking motor 26, rotating slot 27, rotating roller 28, rotating motor 29, steel pipe external cleaner 3, cleaning bracket 31, vacuum pump 32, external laser gun head 33, universal tube 34, steel pipe internal cleaner 4, suspended base 41, fixed horizontal axis 42, self-centering base 43, internal laser gun head 44, front contact plate 45, horizontal side plate 46, rolling wheel group 47, rear connecting plate 48, rear support spring 49, upper support spring 410, laser cleaner 5. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] As attached Figure 1-5 As shown:

[0032] This invention provides a laser cleaning device for processing welded steel pipes, comprising a laser cleaning worktable 1, a steel pipe conveying rotary device 2, an external steel pipe cleaner 3, an internal steel pipe cleaner 4, and a laser cleaner 5. Two sets of the steel pipe conveying rotary devices 2 are fixedly installed on the laser cleaning worktable 1, and the external steel pipe cleaner 3 is arranged between the two sets of steel pipe conveying rotary devices 2. The external steel pipe cleaner 3 is fixedly installed on the laser cleaning worktable 1, and the laser cleaner 5 is arranged on one side of the laser cleaning worktable 1. The laser cleaner 5 is connected to the external steel pipe cleaner 3 and the internal steel pipe cleaner 4 through an optical fiber. The internal steel pipe cleaner 4 is fixedly installed on the laser cleaning worktable 1 and is composed of an internal laser mechanism and a self-centering moving frame. The laser cleaner 5 is a laser cleaning emitter in the prior art. The laser cleaner 5 performs laser cleaning operations on the inside and outside of the steel pipe through the external steel pipe cleaner 3 and the internal steel pipe cleaner 4.

[0033] The steel pipe conveying rotary device 2 includes a conveying base 21, a conveying slot 22, a conveying roller 23, a conveying motor 24, a locking claw 25, a locking motor 26, a rotating slot 27, a rotating roller 28, and a rotating motor 29. The conveying base 21 is fixedly installed on the laser cleaning workbench 1. A conveying slot 22 is opened in the upper middle of the conveying base 21. The conveying roller 23 is rotatably installed on the inner side of the conveying slot 22. One end of the conveying roller 23 rotatably passes through the conveying base 21 and is fixedly connected to the output end of the conveying motor 24. The conveying motor 24 is fixedly installed on the conveying base 21. The locking motor 26 is fixedly installed on the conveying base 21. The output end of the locking motor 26 is rotatably installed on the conveying base 21, and one end of the locking claw 25 is connected to the locking motor 29. The output end of 6 is fixedly connected. A rotating slot 27 is opened in the middle of the locking claw 25. A rotating roller 28 is rotatably installed in the rotating slot 27. One end of the rotating roller 28 rotates through the locking claw 25 and is fixedly connected to the output end of the rotating motor 29. The rotating motor 29 is fixedly installed on one side of the locking claw 25. There are two locking claws 25. The steel pipe conveying rotary device 2 is used to convey steel pipes and can drive the steel pipes to rotate. The outer surface of the steel pipes contacts the conveying roller 23 and the rotating roller 28 respectively. The steel pipe conveying rotary device 2 has two states: one is the normal conveying state, in which the locking motor 26 does not drive the locking claw 25 to rotate; the other is the locking state, in which the locking claw 25 is driven to make the rotating roller 28 contact the outer surface of the steel pipe.

[0034] The steel pipe cleaning device 4 includes a suspended base 41, a fixed horizontal shaft 42, a self-centering base 43, an inner laser gun head 44, a front contact plate 45, a horizontal side plate 46, a rolling wheel assembly 47, a rear connecting plate 48, a rear support spring 49, and an upper support spring 410. The suspended base 41 is fixedly installed above the laser cleaning workbench 1. One end of the suspended base 41 is fixedly connected to the fixed horizontal shaft 42, and the other end of the fixed horizontal shaft 42 is fixedly connected to one end surface of the self-centering base 43. The inner laser gun head 44 is fixedly installed on the other end surface of the self-centering base 43. One end of the surface of the self-centering base 43 is rotatably connected to one end of the front contact plate 45, and the other end of the front contact plate 45 is connected to two water... One end of the flat side plate 46 is rotatably connected, and a roller assembly 47 is rotatably installed between the two horizontal side plates 46. The other end of the horizontal side plate 46 is rotatably connected to one end of the rear connecting plate 48, and the other end of the rear connecting plate 48 is rotatably connected to the middle of the surface of the self-centering base 43. The rear connecting plate 48 is elastically connected to the self-centering base 43 through the rear support spring 49, and the rear connecting plate 48 is also elastically connected to the horizontal side plate 46 through the upper support spring 410. The steel pipe cleaner 4 is used to perform laser cleaning operations on the inside of the steel pipe. The roller assembly 47 is composed of at least two rollers, and there is a gap between each roller. The installation of the rollers does not affect the normal movement of the front contact plate 45 and the rear connecting plate 48.

[0035] Example 1:

[0036] Specifically, the steel pipe external cleaner 3 includes a cleaning bracket 31, a vacuum pump 32, an external laser gun head 33, and a universal tube 34. The cleaning bracket 31 is fixedly installed on the laser cleaning workbench 1. The vacuum pump 32 is fixedly installed on the cleaning bracket 31. The external laser gun head 33 is fixedly installed on one side of the cleaning bracket 31. The universal tube 34 is set above the external laser gun head 33. The universal tube 34 is fixedly connected to the cleaning bracket 31 and they are interconnected. The steel pipe external cleaner 3 is used to perform laser cleaning operations on the outside of the steel pipe. The cleaning bracket 31 is set between two sets of steel pipe conveying rotary machines 2.

[0037] Specifically, the cleaning bracket 31 is an inverted 'U'-shaped hollow structure. A cleaning door is installed on the cleaning bracket 31. The hollow cavity of the cleaning bracket 31 is connected to the universal tube 34. A self-centering base 43 and an inner laser gun head 44 are set on the lower inner side of the cleaning bracket 31. The inner laser gun head 44 and the outer laser gun head 33 are connected to the laser cleaner 5 through optical fibers. The angle between the laser emitted by the inner laser gun head 44 and the outer laser gun head 33 and the surface of the steel pipe is an acute angle. The universal tube 34 is a bamboo-joint flat nozzle plastic universal curved tube in the prior art. The air inside the hollow cavity of the cleaning bracket 31 is drawn out by the vacuum pump 32, so that the hollow cavity is in a negative pressure state. The hollow cavity in the negative pressure state will collect the dust around the outer laser gun head 33 through the universal tube 34. The hollow cavity of the cleaning bracket 31 is filled with a porous material, which is used to adsorb dust and metal powder.

[0038] Specifically, the upper part of the conveying roller 23 protrudes from the conveying slot 22 and comes into contact with the surface of the steel pipe. The surface of the steel pipe also comes into contact with the rotating roller 28. The conveying roller 23 is used to convey the steel pipe for horizontal movement.

[0039] Specifically, the locking claw 25 has an arc-shaped structure and is positioned on both sides of the conveyor base 21. The locking claw 25 uses rotating rollers 28 to restrict the steel pipe and prevent it from shifting left or right or vibrating up or down.

[0040] Specifically, the self-centering base 43 has a hexagonal structure and six surfaces. A self-centering movable frame is rotatably mounted on each of the six surfaces. There are six self-centering movable frames, and each self-centering movable frame is a linkage mechanism.

[0041] Specifically, the self-centering moving frame is composed of the front contact plate 45, the horizontal side plate 46, the rolling wheel group 47, the rear connecting plate 48, the rear support spring 49 and the upper support spring 410, and the steel pipe internal laser machine is composed of the suspended base 41, the fixed horizontal shaft 42, the self-centering base 43 and the internal laser gun head 44.

[0042] Specifically, the self-centering moving frame has a trapezoidal structure, and the rolling wheel group 47 of the self-centering moving frame makes rolling contact with the inner wall of the steel pipe.

[0043] Example 2:

[0044] When laser cleaning is required on the inner and outer surfaces of a steel pipe or its weld seam, the steel pipe is placed on a set of steel pipe conveying rotary devices 2 above the laser cleaning workbench 1. At this time, the conveying rollers 23 of the set of steel pipe conveying rotary devices 2 are in contact with the outer surface of the steel pipe. The conveying motor 24 of the steel pipe conveying rotary device 2 is turned on, and the conveying motor 24 drives the conveying rollers 23, causing the steel pipe to be conveyed and moved. When the steel pipe is about to be conveyed to the outer steel pipe cleaner 3, the locking motor 26 of the steel pipe conveying rotary device 2 is turned on. The locking motor 26 drives the locking claw 25 to rotate inward until there is a slight gap between the rotating roller 28 installed on the locking claw 25 and the steel pipe. Then, the outer laser gun head 33 of the outer steel pipe cleaner 3 and the inner laser gun head 44 of the inner steel pipe cleaner 4 are turned on. The laser gun head performs laser cleaning treatment on the inner and outer surfaces of the steel pipe. When the inner diameter of the steel pipe... After contacting the surface of the front contact plate 45, the front contact plate 45 moves in an arc shape, driving one end of the horizontal side plate 46 to move. The horizontal side plate 46 compresses the rear support spring 49 on its inner side. The rear support spring 49 applies force to the rear connecting plate 48, which also moves in an arc shape and compresses the upper support spring 410. As the steel pipe moves, the rear support spring 49 and the upper support spring 410 gradually bring the horizontal side plate 46 back to a horizontal state. Subsequently, the rolling wheel group 47 will roll into contact with the inner wall of the steel pipe. During the laser cleaning process of the steel pipe, the rotating roller 28 installed on the gripper 25 needs to be directly in contact with the surface of the steel pipe. The rotating motor 29 drives the rotating roller 28 to rotate, and the rotating roller 28 drives the steel pipe to rotate, thereby enabling efficient and comprehensive laser treatment of the inner and outer surfaces of the steel pipe or the weld seams inside and outside the steel pipe.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser cleaning device for processing welded steel pipes, comprising a laser cleaning workbench (1), a steel pipe conveying rotary device (2), an external steel pipe cleaner (3), an internal steel pipe cleaner (4), and a laser cleaner (5). Two sets of the steel pipe conveying rotary devices (2) are fixedly installed on the laser cleaning workbench (1), with at least three steel pipe conveying rotary devices (2) forming a group. An external steel pipe cleaner (3) is provided between the two sets of steel pipe conveying rotary devices (2). The external steel pipe cleaner (3) is fixedly installed on the laser cleaning workbench (1). A laser cleaner (5) is provided on one side of the laser cleaning workbench (1). The laser cleaner (5) is connected to the external steel pipe cleaner (3) and the internal steel pipe cleaner (4) via optical fiber. An internal steel pipe cleaner (4) is fixedly installed on the laser cleaning workbench (1). The internal steel pipe cleaner (4) is composed of an internal steel pipe laser mechanism and a self-centering moving frame. The steel pipe conveying rotary device (2) includes a conveying base (21), a conveying slot (22), a conveying roller (23), a conveying motor (24), a locking claw (25), a locking motor (26), a rotating slot (27), a rotating roller (28), and a rotating motor (29). The conveying base (21) is fixedly installed on the laser cleaning workbench (1). A conveying slot (22) is provided in the upper middle of the conveying base (21). A conveying roller (23) is rotatably installed on the inner side of the conveying slot (22). Any end of the conveying roller (23) rotates through the conveying base (21) and is fixedly connected to the output end of the conveying motor (24). The conveying motor (24) is fixedly installed. Installed on a conveyor base (21), a locking motor (26) is fixedly installed on the conveyor base (21), the output end of the locking motor (26) is rotatably installed on the conveyor base (21), and one end of the locking claw (25) is fixedly connected to the output end of the locking motor (26). A rotating slot (27) is opened in the middle of the locking claw (25), and a rotating roller (28) is rotatably installed in the rotating slot (27). Any end of the rotating roller (28) rotates through the locking claw (25) and is fixedly connected to the output end of the rotating motor (29). The rotating motor (29) is fixedly installed on one side of the locking claw (25). There are two locking claws (25). The steel pipe cleaning device (4) includes a suspended base (41), a fixed horizontal shaft (42), a self-centering base (43), an inner laser gun head (44), a front contact plate (45), a horizontal side plate (46), a rolling wheel assembly (47), a rear connecting plate (48), a rear support spring (49), and an upper support spring (410). The suspended base (41) is fixedly installed above the laser cleaning workbench (1). One end of the suspended base (41) is fixedly connected to the fixed horizontal shaft (42), and the other end of the fixed horizontal shaft (42) is fixedly connected to one end surface of the self-centering base (43). The inner laser gun head (44) is fixedly installed on the other end surface of the self-centering base (43). One end of the surface of the self-centering base (43) is rotatably connected to one end of the front contact plate (45), and the other end of the front contact plate (45) is rotatably connected to one end of the two horizontal side plates (46). A rolling wheel assembly (47) is rotatably installed between the two horizontal side plates (46). The other end of the horizontal side plate (46) is rotatably connected to one end of the rear connecting plate (48). The other end of the rear connecting plate (48) is rotatably connected to the middle of the surface of the self-centering base (43). The rear connecting plate (48) is elastically connected to the self-centering base (43) through the rear support spring (49), and the rear connecting plate (48) is also elastically connected to the horizontal side plate (46) through the upper support spring (410).

2. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The steel pipe external cleaner (3) includes a cleaning bracket (31), a vacuum pump (32), an external laser gun head (33), and a universal tube (34). The cleaning bracket (31) is fixedly installed on the laser cleaning workbench (1). The vacuum pump (32) is fixedly installed on the cleaning bracket (31). The external laser gun head (33) is fixedly installed on one side of the cleaning bracket (31). The universal tube (34) is set above the external laser gun head (33). The universal tube (34) is fixedly connected to the cleaning bracket (31) and they are interconnected.

3. The laser cleaning equipment for processing welded steel pipes as described in claim 2, characterized in that: The cleaning bracket (31) is an inverted 'U'-shaped hollow structure. A processing door is installed on the cleaning bracket (31). The hollow cavity of the cleaning bracket (31) is connected to the universal tube (34). A self-centering base (43) and an inner laser gun head (44) are provided on the lower inner side of the cleaning bracket (31). The inner laser gun head (44) and the outer laser gun head (33) are connected to the laser cleaner (5) through optical fiber. The angle between the laser emitted by the inner laser gun head (44) and the outer laser gun head (33) and the surface of the steel pipe is an acute angle.

4. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The upper part of the conveying roller (23) protrudes from the conveying slot (22) and comes into contact with the surface of the steel pipe, and the surface of the steel pipe also comes into contact with the rotating roller (28).

5. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The gripper (25) has an arc-shaped structure and is positioned on both sides of the conveyor base (21).

6. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The self-centering base (43) is a hexagonal structure with six surfaces. A self-centering movable frame is rotatably mounted on each of the six surfaces. There are six self-centering movable frames.

7. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The self-centering moving frame is composed of the front contact plate (45), the horizontal side plate (46), the rolling wheel group (47), the rear connecting plate (48), the rear support spring (49) and the upper support spring (410), and the steel pipe laser machine is composed of the suspended base (41), the fixed horizontal axis (42), the self-centering base (43) and the inner laser gun head (44).

8. The laser cleaning equipment for processing welded steel pipes as described in claim 1, characterized in that: The self-centering moving frame has an overall trapezoidal structure, and the rolling wheel group (47) of the self-centering moving frame rolls in contact with the inner wall of the steel pipe.

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