A laser pipe cutting machine for cutting large diameter pipes

Abstract

The present invention discloses a laser pipe cutting machine for cutting large-diameter pipes, comprising a horizontal foundation, a machine body provided on one side of the horizontal foundation, a laser cutting device provided on the machine body, side frames provided on one side of both ends of the machine body, two parallel guide rail grooves provided on the horizontal foundation between the side frames, two corresponding guide rail frames provided in the guide rail grooves, the tops of the guide rail frames being V-shaped rails, a load-carrying vehicle provided above both ends of the guide rail frames, a hydraulic telescopic column provided above the load-carrying vehicle, a fixed shaft seat provided at the top of the hydraulic telescopic column, a rotating motor provided in the fixed shaft seat, and a double-layer clamping device provided at the top of the rotating shaft of the rotating motor in the fixed shaft seat, and an adjustable material rack corresponding to the machine body provided on the other side of the horizontal foundation. The beneficial effects of the present invention are: adapting to the processing of pipes of various diameters, further improving production continuity, reducing the possibility of human operational errors, improving cutting accuracy and stability, and having a simple overall structure that is easy to install, effectively saving equipment costs.

Description

Technical Field

[0001] The present invention relates to the technical field related to laser tube cutting machines, and in particular to a laser tube cutting machine for cutting large-diameter pipes. Background Art

[0002] Compared with traditional flame cutting and plasma cutting machines, laser tube cutting machines have the advantages of fast cutting speed, high cross-section finish, and high cutting accuracy. In recent years, they have been widely used in various industries. At present, for the processing of large-diameter pipes, the loading method is generally lifted by a suspension device, which requires manual cooperation. It is prone to collision and loading is dangerous. In addition, the clamping range of the current laser tube cutting machine's clamping device is insufficient and cannot adapt to the clamping requirements of various pipe diameters. As far as the current laser tube cutting machine is concerned, the general large-diameter clamping device has a large inner diameter, is large and bulky, and has high equipment cost. In addition, due to the large diameter of the pipe, manual intervention and position control are often required for clamping and loading, which increases the labor intensity of the operator and the operational risk. Coupled with the possibility of human error, cutting accuracy and stability cannot be fully guaranteed. Summary of the Invention

[0003] In view of the above shortcomings, the present invention adopts the following technical solutions:

[0004] A laser pipe cutting machine for large-diameter pipe cutting comprises a horizontal foundation, a machine body is provided on one side of the horizontal foundation, a laser cutting device is provided on the machine body, side frames are provided on one side of both ends of the machine body, two parallel guide rail grooves are provided on the horizontal foundation between the side frames, two corresponding guide rail frames are provided in the guide rail grooves, the top of the guide rail frame is a V-shaped rail, a load transport vehicle is provided above both ends of the guide rail frame, the bottom step of the load transport vehicle is provided with a rail groove corresponding to the V-shaped rail on the guide rail frame, the chassis of the load transport vehicle outside the rail groove is provided with a mounting groove, a motor groove is provided outside the mounting groove, an upper partition and a lower partition are provided inside the mounting groove, and a motor groove is provided inside the motor groove. Motors are symmetrically provided on both sides, and the rotating shaft of the motor passes through the inner wall of the motor slot and is connected to the mounting slot. A threaded rod is provided at the top of the rotating shaft and is connected to the upper partition plate. A rotating shaft seat corresponding to the threaded rod is provided in the upper partition plate, and a moving block is provided on the threaded rod. A rotating gear is provided above the moving block, and a rotating motor corresponding to the rotating gear is provided at the bottom of the moving block. A hydraulic telescopic column is provided above the load-carrying transport vehicle, and a fixed shaft seat is provided at the top of the hydraulic telescopic column. A rotating motor is provided in the fixed shaft seat, and a double-layer clamping device is provided at the top of the rotating shaft of the rotating motor in the fixed shaft seat. An adjustable material rack corresponding to the machine body is provided on the other side of the horizontal foundation.

[0005] Furthermore, the machine body includes an inner cross frame connecting the side frames on both sides, an outer cross frame corresponding to the inner cross frame is provided parallel to the outer side of the inner cross frame, a first guide rail is provided parallel to the outer cross frame and the inner cross frame, a corresponding first slider is provided on the first guide rail, and the laser cutting device is provided on the first slider.

[0006] Furthermore, the laser cutting device includes a support column, a crossbeam parallel to the guide rail groove is provided on one side of the support column, a second slider is provided on the crossbeam, a rotating seat is provided at the bottom of the second slider, a first hydraulic telescopic rod is provided in the rotating seat, a horizontal rotating axis is provided at the top of the first hydraulic telescopic rod, and a laser cutting head is provided at the top of one side of the rotating axis.

[0007] Furthermore, the double-layer clamping device includes a three-jaw chuck at the top and a fixed cylinder at the rear end. A hydraulic oil tank is arranged in an annular shape inside the fixed cylinder. Four hydraulic telescopic rods are uniformly arranged in a circular shape on the fixed cylinder to connect to the oil tank, and a clamping block is provided on the top of the hydraulic rod. The clamping block is a multi-layer stepped structure that rises inward, and the inner and outer sides of each step are set to a wedge shape.

[0008] Furthermore, two rows of parallel hydraulic telescopic rods are provided at the bottom of the guide rail groove, and the guide rail frame is provided at the top of the hydraulic telescopic rod in the guide rail groove. A dustproof frame is provided parallel to the bottom of the V-shaped rail of the guide rail frame, and a tooth groove corresponding to the rotating gear is provided on the outer side of the V-shaped frame of the guide rail frame.

[0009] Furthermore, a linear guide rail corresponding to the second slider is provided on the beam, which is used for the slider to move along the direction of the beam.

[0010] Furthermore, several support frames are provided above the inner side surface of the inner cross frame, and the support frames include two pairs of symmetrically arranged fixed ear seats, a rotating motor is provided on the outer side of one side of the fixed ear seat, a rotating shaft is provided in the fixed ear seat, a cantilever is provided on the rotating shaft, two parallel rollers are provided on the top of the cantilever, and a support block such as a dry disc is provided on the roller.

[0011] Furthermore, a limit block is provided at the tail end of the cantilever, the upper side of the outer side of the limit block is chamfered, and the lower side of the outer side of the limit block is a right angle.

[0012] Furthermore, the load-carrying transport vehicle is a Mecanum wheel intelligent vehicle, and is a heavy-duty Mecanum wheel vehicle.

[0013] Furthermore, the adjustable material rack is provided with a plurality of legs on both sides, the legs on one side of the adjustable material rack are all configured as hydraulic telescopic rods, a plurality of rotating shafts are transversely arranged on the adjustable material rack, and rotating motors corresponding to the rotating shafts are provided on the sides of the adjustable material rack at both ends of the rotating shafts, and a plurality of semi-arc-shaped pipe fixing blocks are provided on the rotating shafts.

[0014] The beneficial effects of the present invention are: 1. The present invention enables the clamping device to be flexibly adjusted according to the size of different pipes through the separate design of the machine body and the clamping device and the different clamping modes, providing a larger adaptability range. The intelligent trolley can transport pipes of different sizes to the appropriate clamping device position according to demand, facilitating the production of different products; 2. The transportation and clamping of pipes are realized by the intelligent load-carrying transport vehicle, which greatly reduces manual intervention, reduces the labor intensity of operators, reduces the possibility of human operation errors, and improves cutting accuracy and stability; 3. Through the coordinated work of the clamping device of the load-carrying transport vehicle, the pipe can maintain a stable clamping state during the cutting process, avoids vibration or displacement of the pipe during the cutting process, and ensures the cutting accuracy and processing quality of the pipe; 4. The overall structure of the present invention is simple and easy to install, which can save installation costs and equipment costs, and avoid the problem of difficulty in loading large-diameter pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a structural schematic diagram of a load-carrying transport vehicle according to the present invention;

[0017] Figure 3 Schematic diagram of the cross-sectional structure of the load transport vehicle of the present invention;

[0018] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A;

[0019] Figure 5 This is a schematic diagram of the bottom structure of the load-carrying transport vehicle of the present invention;

[0020] Figure 6 This is a schematic diagram of the adjustable material rack structure of the present invention;

[0021] Figure 7 This is a schematic structural diagram of the laser cutting device of the present invention;

[0022] Figure 8 This is a schematic diagram of the support structure of the present invention;

[0023] Figure 9 It is a schematic structural diagram of the double-layer clamping device of the present invention.

[0024] In the figure: 1-body, 2-horizontal foundation, 3-adjustable material rack, 4-laser cutting device, 41-support column, 42-crossbeam, 43-second slider, 44-rotating seat, 45-first hydraulic telescopic rod, 46-laser cutting head, 5-side frame, 51-inner cross frame, 52-outer cross frame, 53-first guide rail, 54-first slider, 55-support frame, 56-fixed ear seat, 57-rotating axis, 58-cantilever, 59-roller, 6-guide rail groove, 60-disc support block, 61-guide rail frame, 62-dustproof frame, 63-track groove, 7-load transport vehicle, 71-mounting groove, 72-motor groove, 73-upper partition, 74-lower partition, 75-threaded rod, 76-moving block, 77-rotating gear, 8-hydraulic telescopic column, 81-fixed shaft seat, 82-double-layer clamping device, 83-three-jaw chuck, 84-fixed cylinder, 85-hydraulic oil tank, 86-clamping block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Combine Figures 1 to 9 Shown:

[0027] A laser pipe cutting machine for large-diameter pipe cutting includes a horizontal foundation 2. A good foundation helps to ensure that the horizontal position of the machine body is stable and does not deviate. A machine body 1 is provided on one side of the horizontal foundation 2. A laser cutting device 4 is provided on the machine body 1. The laser cutting device 4 includes a support column 41. A crossbeam 42 parallel to the guide rail groove 6 is provided on one side of the support column 41. A second slider 43 is provided on the crossbeam 42. A rotating seat 44 is provided at the bottom of the second slider 43. A first hydraulic telescopic rod 45 is provided in the rotating seat 44. The first hydraulic telescopic rod 45 can be rotated by the rotating seat 44. A horizontal rotating shaft is provided at the top of the first hydraulic telescopic rod 45, and a laser cutting head 46 is provided at the top of one side of the rotating shaft. The laser cutting head 46 can be rotated through the rotating shaft, combined with the rotation of the rotating seat and the movement of the second slider 43 on the beam 42, to perform multi-angle and multi-directional cutting of the pipeline. A linear guide corresponding to the second slider 43 is provided on the beam 42, which is used for the movement of the slider along the direction of the beam 42. Through the linear guide and the corresponding power system, the position of the second slider 43 can be effectively adjusted to ensure the accuracy of the processing position and the processing accuracy.

[0028] A side frame 5 is provided on one side of both ends of the body 1, and two parallel guide rail grooves 6 are provided on the horizontal foundation 2 between the side frames 5. Two corresponding guide rail frames 61 are provided in the guide rail groove 6. The top of the guide rail frame 61 is a V-shaped rail, and the outer side of the V-shaped rail of the guide rail frame 61 is provided with a tooth groove corresponding to the rotating gear 77. A load transport vehicle 7 is provided above both ends of the guide rail frame 61, and the bottom step of the load transport vehicle 7 is provided with a track groove 63 corresponding to the V-shaped rail on the guide rail frame 61. The chassis of the load transport vehicle 7 outside the track groove 63 is provided with a mounting groove 71, and a motor groove 72 is provided on the outer side of the mounting groove 71. An upper partition 73 and a lower partition 74 are provided on the inner side of the mounting groove 71. Motors are symmetrically provided on both sides of the motor groove 72, and the rotating shaft of the motor passes through the inner wall of the motor groove 72 and is connected to the mounting groove 71. A threaded rod 75 is provided on the top of the rotating shaft and is connected to the upper partition 73. A rotating shaft seat corresponding to the threaded rod 75 is provided in the upper partition 73. A moving block 76 is provided on the top, and a threaded groove is provided in the moving block 76 that fits with the threaded rod 75. A rotating gear 77 is provided above the moving block 76, and a rotating motor corresponding to the rotating gear 77 is provided at the bottom of the moving block 76. When the motor in the motor groove rotates, the threaded rod rotates, causing the moving block 76 to move to a position close to the guide rail frame 61, so that the rotating gear engages with the tooth groove. When the rotating motor rotates, the rotating gear rotates, and cooperates with the tooth groove to make the load transport vehicle move on the V-rail on the guide rail frame 61, and cooperates with the first slider 54 to move the laser cutting device 4 to accurately process the pipeline. A hydraulic telescopic column 8 is provided above the load transport vehicle 7, and a fixed shaft seat 81 is provided at the top of the hydraulic telescopic column 8. A rotating motor is provided in the fixed shaft seat 81, and a double-layer clamping device 82 is provided at the top of the rotating shaft of the rotating motor in the fixed shaft seat 81. An adjustable material rack 3 corresponding to the machine body 1 is provided on the other side of the horizontal foundation 2.

[0029] There are several legs on both sides of the adjustable material rack 3. The legs on one side of the adjustable material rack 3 are all set to hydraulic telescopic rods. The hydraulic telescopic rods can effectively control the inclination angle of the adjustable material rack 3. Several rotating shafts are set horizontally on the adjustable material rack 3. Rotating motors corresponding to the rotating shafts are provided on the sides of the adjustable material rack 3 at both ends of the rotating shafts. Several semi-arc-shaped pipe fixing blocks are provided on the rotating shafts. Combined with the lifting of the hydraulic telescopic rods, the pipeline is ensured to slide gradually along the inclination angle to ensure the stability of loading. Different inclination angles can be used for pipes of different diameters to ensure the stability of the rack loading.

[0030] The machine body 1 includes an inner cross frame 51 connecting the side frames 5 on both sides, an outer cross frame 52 corresponding to the inner cross frame 51 is provided parallel to the outer side of the inner cross frame 51, and a first guide rail 53 is provided parallel to the outer cross frame 52 and the inner cross frame 51, and a corresponding first slider 54 is provided on the first guide rail 53, and a laser cutting device 4 is provided on the first slider 54. By setting a conventional guide rail power system, the processing position of the laser cutting device 4 can be changed, thereby improving the processing flexibility.

[0031] The double-layer clamping device 82 includes a three-jaw chuck 83 at the top and a fixed cylinder 84 at the rear end. A hydraulic oil tank 85 is arranged in an annular shape inside the fixed cylinder 84. The hydraulic oil tank 85 is provided with a corresponding hydraulic pump connected to it. The hydraulic telescopic rod on it is effectively extended and retracted through the hydraulic pump. Four hydraulic telescopic rods are uniformly arranged in a circular shape on the fixed cylinder 84 and connected to the hydraulic oil tank 85, and a clamping block 86 is provided on the top of the hydraulic rod. The clamping block 86 is a multi-layer stepped structure that rises inward, and the inner and outer sides of each step are set to a wedge shape, which can be used to clamp the inner diameter of a large-diameter pipe and then perform corresponding processing. The three-jaw chuck 83 is used to clamp pipe materials with smaller diameters. If necessary, the upper structure of its clamping jaws can be modified into a clamping block 86 structure to further increase the clamping diameter range and improve the clamping capacity.

[0032] Two rows of parallel hydraulic telescopic rods are provided at the bottom of the guide rail groove 6, and a guide rail frame 61 is provided at the top of the hydraulic telescopic rod in the guide rail groove 6. The hydraulic telescopic rod is used to regulate the lifting and lowering of the guide rail frame 61. A dustproof frame 62 is provided in parallel at the bottom of the V-shaped rail of the guide rail frame 61. When the V-shaped rail of the guide rail frame 61 is combined with the track groove 63, the dustproof frame 62 rises to the horizontal foundation surface to prevent dust from entering the track. During processing, the dust is removed manually or by setting a dust removal device, and then the guide rail frame 61 is retracted. The outer side of the V-shaped frame of the guide rail frame 61 is provided with a tooth groove corresponding to the rotating gear 77, so that the load transport vehicle 7 can move effectively on the V-shaped rail.

[0033] A plurality of support frames 55 are provided above the inner side surface of the inner cross frame 51. The support frames 55 include two pairs of symmetrically arranged fixed ear seats 56. A rotating shaft 57 is provided in the fixed ear seat 56. A rotating motor is provided on the outer side of one side of the fixed ear seat 56. A cantilever 58 is provided on the rotating shaft 57. Two parallel rollers 59 are provided at the top of the cantilever 58. A dry disc support block 60 is provided on the roller 59. The horizontal projection of the midpoint of the circular connecting line of the disc support block 60 overlaps with the central symmetry line of the guide rail frame 61. The diameter of the disc support block 60 is set according to actual needs. If necessary, motors can be set at both ends of the roller 59 to control the rotation of the roller 59 to assist the rotation of the pipe material.

[0034] A limit block 50 is provided at the tail end of the cantilever 58. The upper side of the outer side of the limit block 50 is chamfered, and the lower side of the outer side of the limit block 50 is a right angle. The right-angle structure limits the cantilever 58 from continuing to rotate downward, and the chamfered corner setting facilitates the cantilever 58 to rotate upward and retract.

[0035] The load transport vehicle 7 is a Mecanum wheel intelligent vehicle, and is a heavy-duty Mecanum wheel vehicle, which can complete omnidirectional movement by setting corresponding detection devices and corresponding intelligent systems.

[0036] Working principle: First, put the pipe on the adjustable material rack, and then two load-carrying vehicles are moved to the two ends of the pipe by setting the corresponding intelligent system. The load-carrying vehicle is a heavy-duty Mecanum wheel trolley, which can be identified, confirmed and controlled by setting the corresponding detection device and the corresponding intelligent system. The height is adjusted by the hydraulic telescopic column. For pipes with smaller diameters, they can be clamped by a three-claw chuck. For pipes with larger diameters, the hydraulic telescopic rod pushes the clamp to clamp the inner diameter of the pipe. The hydraulic telescopic column is lifted, and the load-carrying vehicle is controlled by the intelligent system to transport the pipe. At this time, the support frame is lowered by the motor, and the bottom track groove of the load-carrying vehicle is controlled to fit with the track by setting the corresponding identification device and the intelligent control system. The hydraulic telescopic column is lowered and adjusted so that the support frame provides support. Different numbers of support frames can be selected according to the length of the pipe. The guide frame fits the V-rail with the track groove under the action of the hydraulic telescopic rod. At this time, the motor is rotated by the motor slot. The movement causes the threaded rod to drive the moving block to move, so that the rotating gear engages with the pool groove on the outside of the V-rail, and the rotating motor on the moving block rotates, so that the load-carrying vehicle can move back and forth along the track. When the guide rail frame rises, the dustproof frame is just parallel to the horizontal foundation to prevent dust from flowing into the guide rail during processing. Each processing is removed by manual or dust removal device. After the processing is completed, the product is removed, the guide rail frame moves down, the load-carrying vehicle resumes movement, and moves out to perform the next step of material collection. The support frame can be retracted for repetitive operation processing. The corresponding mobile operations in the application of the present invention are all equipped with corresponding power systems, identification devices and intelligent operating systems. Information is collected through conventional identification devices, and the intelligent system controls the power system to operate. For those skilled in the art, the settings of the identification device and the power system are set according to actual needs and can be adaptively adjusted, not limited to the implementation methods of this application.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A laser pipe cutting machine for large diameter pipe cutting, characterized by: The invention comprises a horizontal foundation (2), a machine body (1) is provided on one side of the horizontal foundation (2), a laser cutting device (4) is provided on the machine body (1), side frames (5) are provided on one side of both ends of the machine body (1), two parallel guide rail grooves (6) are provided on the horizontal foundation (2) between the side frames (5), two corresponding guide rail frames (61) are provided in the guide rail grooves (6), the top of the guide rail frame (61) is a V-shaped rail, a load transport vehicle (7) is provided above both ends of the guide rail frame (61), the bottom step of the load transport vehicle (7) is provided with a track groove (63) corresponding to the V-shaped rail on the guide rail frame (61), and the load transport vehicle (7) outside the track groove (63) is provided with a V-shaped rail. The chassis of the vehicle (7) is provided with a mounting groove (71), the outer side of the mounting groove (71) is provided with a motor groove (72), the inner side of the mounting groove (71) is provided with an upper partition (73) and a lower partition (74), the motors are symmetrically provided on both sides of the motor groove (72), and the rotating shaft of the motor passes through the inner wall of the motor groove (72) and is connected to the mounting groove (71), the top end of the rotating shaft is provided with a threaded rod (75) and is connected to the upper partition (73), the upper partition (73) is provided with a rotating shaft seat corresponding to the threaded rod (75), the threaded rod (75) is provided with a moving block (76), and the moving block (76) is provided with a rotating gear (77) above. The bottom of the moving block (76) is provided with a rotating motor corresponding to the rotating gear (77), and a hydraulic telescopic column (8) is provided above the load transport vehicle (7). The top of the hydraulic telescopic column (8) is provided with a fixed shaft seat (81), and a rotating motor is provided in the fixed shaft seat (81), and a double-layer clamping device (82) is provided at the top of the rotating shaft of the rotating motor in the fixed shaft seat (81). An adjustable material rack (3) corresponding to the machine body (1) is provided on the other side of the horizontal foundation (2), and the double-layer clamping device (82) includes a three-jaw chuck (83) at the top and a fixed cylinder (84) at the rear end, and a hydraulic oil cylinder is provided in an annular shape inside the fixed cylinder (84). The fixed cylinder (84) is provided with four hydraulic telescopic rods in a uniform circumferential shape and connected to the hydraulic oil tank (85), and the top of the hydraulic telescopic rods is provided with a clamping block (86), the clamping block (86) is a multi-layered ladder structure rising inward, and the inner and outer sides of each ladder are set in a wedge shape, the bottom of the guide rail groove (6) is provided with two rows of hydraulic telescopic rods arranged in parallel, and the top of the hydraulic telescopic rods in the guide rail groove (6) is provided with the guide rail frame (61), the bottom of the V-shaped rail of the guide rail frame (61) is provided with a dustproof frame (62) in parallel, and the outer side of the V-shaped frame of the guide rail frame (61) is provided with a tooth groove corresponding to the rotating gear (77).

2. The laser pipe cutting machine for large diameter pipe cutting according to claim 1, characterized in that: The machine body (1) comprises an inner cross frame (51) connected to the side frames (5) on both sides, an outer cross frame (52) corresponding to the inner cross frame (51) is provided on the outer side of the inner cross frame (51) in parallel, a first guide rail (53) is provided on the outer cross frame (52) and the inner cross frame (51) in parallel, a corresponding first slide block (54) is provided on the first guide rail (53), and the laser cutting device (4) is provided on the first slide block (54).

3. The laser pipe cutting machine for large diameter pipe cutting according to claim 2, characterized in that: The laser cutting device (4) comprises a support column (41), a crossbeam (42) parallel to the guide rail groove (6) is provided on one side of the support column (41), a second slider (43) is provided on the crossbeam (42), a rotating seat (44) is provided at the bottom of the second slider (43), a first hydraulic telescopic rod (45) is provided in the rotating seat (44), a horizontal rotating shaft is provided at the top of the first hydraulic telescopic rod (45), and a laser cutting head (46) is provided at the top end of one side of the rotating shaft.

4. The laser pipe cutting machine for large diameter pipe cutting according to claim 3, characterized in that: A linear guide rail corresponding to the second slider (43) is provided on the crossbeam (42) for moving the slider along the direction of the crossbeam (42).

5. The laser pipe cutting machine for large diameter pipe cutting according to claim 4, characterized in that: A plurality of support frames (55) are provided above the inner side surface of the inner cross frame (51), and the support frames (55) include two pairs of symmetrically arranged fixed ear seats (56). A rotating motor is provided on the outer side of one side of the fixed ear seat (56). A rotating shaft (57) is provided in the fixed ear seat (56), and a cantilever (58) is provided on the rotating shaft (57). Two parallel rollers (59) are provided at the top of the cantilever (58), and a plurality of disc support blocks (60) are provided on the rollers (59).

6. The laser pipe cutting machine for large diameter pipe cutting according to claim 5, characterized in that: A limit block (50) is provided at the tail end of the cantilever (58), the upper side of the outer side of the limit block (50) is rounded, and the lower side of the outer side of the limit block (50) is a right angle.

7. The laser pipe cutting machine for large diameter pipe cutting according to claim 6, characterized in that: The load transport vehicle (7) is a Mecanum wheel intelligent vehicle, and is a heavy-duty Mecanum wheel vehicle.

8. The laser pipe cutting machine for large diameter pipe cutting according to claim 7, characterized in that: The adjustable material rack (3) is provided with a plurality of legs on both sides, and the legs on one side of the adjustable material rack (3) are all configured as hydraulic telescopic rods. The adjustable material rack (3) is laterally provided with a plurality of rotating shafts, and the sides of the adjustable material rack (3) at both ends of the rotating shafts are provided with rotating motors corresponding to the rotating shafts, and the rotating shafts are provided with a plurality of semi-arc-shaped pipe fixing blocks.

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