A groove processing device and a groove processing method
By designing a beveling processing device and method, automated processing of the initial and final beveling of wind turbine tower steel plates was achieved, solving the consistency problem in existing technologies and improving processing efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JINGMEN TIANSHUN WIND POWER EQUIP CO LTD
- Filing Date
- 2026-03-31
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technologies cannot automate the processing of the initial and final bevels of wind turbine tower steel plates, resulting in poor consistency in automated processing and affecting the quality of subsequent processing.
A beveling device was designed, including a beveling trolley, a steel plate support platform, and a detachable extension plate. The device achieves automated beveling of the beginning and end of the steel plate through a crawling structure and a beveling structure, and uses a plasma gun for beveling.
It enables automated processing of the beveling at the beginning and end of the steel plate, improving processing consistency and efficiency, simplifying the structural design of the extension plate, and facilitating disassembly and assembly.
Smart Images
Figure CN122099518A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of wind turbine tower production equipment, and specifically relates to a beveling device and a beveling method. Background Technology
[0002] The fabrication of wind turbine towers involves: preparing tower sections, assembling and welding multiple sections together, and then welding flanges at both ends. The preparation methods for tower sections include: steel plate cutting, steel plate beveling, plate rolling, and welding. Beveling equipment is used in the beveling process.
[0003] For example, patent application number CN202310175408.1 discloses a high-manganese steel cutting device, which includes: a traveling trolley that can move from right to left on the surface of high-manganese steel; a fixed rod that is set along the front-back direction and fixed to the upper surface of the traveling trolley; a horizontal adjusting rod that is sleeved on the fixed rod and can move back and forth along the fixed rod; a vertical adjusting rod that is connected to the right side of the horizontal adjusting rod and can move up and down; and an angle adjusting clamping rod that is set along the left-right direction and fixedly connected to the bottom of the vertical adjusting rod. An oxyacetylene gun and a plasma cutting gun are arranged sequentially on the right side of the angle adjusting rod. The oxyacetylene gun and the plasma cutting gun can rotate synchronously around the axis of the angle adjusting clamping rod to form a bevel at a specific angle when cutting high-manganese steel. For example, patent application number CNCN201210185746.5 discloses an autonomous mobile robot system for plasma-MIG hybrid welding, including a robot body, a control system, and a plasma-MIG hybrid welding system. The robot body includes a crawling mechanism and an operating mechanism. The control system includes a sensing system, a robot body control box, and a robot main control system. The plasma-MIG hybrid welding system includes a digital MIG welding power supply, a plasma power supply, a wire feeder, a shielding gas, a plasma welding torch, and a MIG welding torch. The advantages of this invention are that the plasma-MIG hybrid welding robot can adapt to all-position weld seams of large steel structures, adopts an adsorption-type crawling mechanism for flexible movement, uses a laser weld seam tracking sensor, and has a macroscopic environment monitoring and molten pool monitoring system. It can meet the swing, control, and movement requirements when welding thick plates in all positions.
[0004] For the processing of wind turbine casings, the steel plates are relatively thick, usually requiring several beveling tools. At the beginning and end of the steel plates, the beveling trolley cannot achieve automated processing. If manual processing is used, consistency with automated processing cannot be guaranteed, affecting subsequent processing. Summary of the Invention
[0005] To address the aforementioned problems, embodiments of the present invention provide a beveling device and a beveling method, which can achieve automatic processing of the beginning and end of steel plates. The technical solution is as follows:
[0006] On one hand, embodiments of the present invention provide a beveling device, including a beveling trolley and a steel plate support platform. The beveling trolley includes a crawling structure and a beveling structure thereon, the beveling structure being located outside the crawling structure. The beveling device also includes an extension plate detachably disposed at the beginning or end of the steel plate. The extension plate is located at the beginning or end of the crawling structure's travel path, is arranged along the direction of the travel path, and is connected to the end of the steel plate. A limiting mechanism is provided on the upper side of the end away from the steel plate. Two upper fixing rods are respectively provided on the upper sides of both ends in the width direction, and a lower clamping mechanism is provided on the lower side. The upper side of the extension plate is flush with the upper side of the steel plate. The crawling structure is set along the direction of the walking trajectory, with its end near the steel plate extending towards the steel plate relative to the extension plate to form an extension portion; the extension portion abuts against the upper side of the steel plate, and the lower clamping mechanism is located below the extension portion and clamps against the lower side of the steel plate; when processing begins, the extension plate is set at the beginning of the steel plate, the crawling structure is placed on the extension plate, and there is a gap between the bevel structure and the beginning of the steel plate; when the extension plate is set at the end of the steel plate, the crawling structure can move onto the extension plate; when the crawling structure moves to the extension plate and abuts against the limiting mechanism, the crawling structure is located between the two upper fixed rods, and the bevel structure is located outside the extension plate and away from the steel plate.
[0007] Specifically, when processing the long side of the steel plate, the extension plate is placed on the wide side of the steel plate and close to the bevel to be processed; when processing the wide side of the steel plate, the extension plate is placed on the long side of the steel plate and close to the bevel to be processed; the number of extension plates is one or two; when the number of extension plates is one, the extension plate is placed at the beginning of the steel plate when processing begins; when processing is almost completed, the extension plate is placed at the end of the steel plate; when the number of extension plates is two, the two extension plates are placed at the beginning and end of the steel plate respectively.
[0008] Preferably, the extension plate includes a first extension plate and a second extension plate. The end of the first extension plate near the steel plate is a vertically oriented plane, and the end of the second extension plate near the steel plate is an inclined surface that mates with a bevel. If the end of the steel plate that connects to the extension plate is a bevel, then the second extension plate is fixed to the steel plate; otherwise, the first extension plate is fixed to the steel plate.
[0009] Preferably, the crawling structure has an inner guide structure on its inner side and a bracket on its outer side; the inner guide structure includes multiple inner guide wheels arranged side by side in the direction of the movement trajectory, and an outer guide wheel is provided at the outer end of the bracket; both the inner guide wheel and the outer guide wheel are vertically arranged; when processing begins, the inner guide wheel rests against the outer side of the inner upper fixing rod; when the crawling structure is completely located on the steel plate, the outer guide wheel rests against the outer end of the steel plate; the distance between the inner upper fixing rod and the outer end of the steel plate is L1, and the distance between the inner upper fixing rod and the outer guide wheel is L2, where L1=L2.
[0010] The extension plate is a rectangular plate with a perforated hole in its middle along its direction. The hole is located inside the bevel and is thinner than the steel plate. The upper fixing rod is a rectangular rod with its lower side horizontally set and welded to the extension plate. The upper fixing rod is only provided on the part of the extension plate near the steel plate, and the length of the extension is greater than 10cm.
[0011] Wherein, the distance between the limiting mechanism and the end of the extension plate closest to the steel plate is B1, the distance between the two upper fixing rods is B2, and the distance between the end of the upper fixing rod furthest from the steel plate and the limiting mechanism is B3; the width of the crawling structure is C1, and its length is C2; the distance between the bevel structure and the end of the crawling structure is C3, and the distance between the bevel structure and the beginning of the crawling structure is C4; B2>C1, B3<C2, B1>C3, B1>C4.
[0012] Preferably, the limiting mechanism is located in the middle of the end of the extension plate away from the steel plate, and is perpendicular to the extension plate; the end of the extension plate away from the steel plate is rounded; during processing, the wires and / or pipes of the beveling trolley are placed on the extension plate.
[0013] The lower clamping mechanism includes an L-shaped arm and a screw. The L-shaped arm is located on the lower side of the extension plate, close to the steel plate, and includes a vertical arm and a horizontal arm. The vertical arm is vertically oriented, with its upper end fixed to the lower side of the extension plate. The horizontal arm is located on the side of the lower end of the vertical arm close to the steel plate, along the direction of the travel trajectory, directly below the two upper fixed rods, with its end directly below the steel plate. The screw is vertically oriented, with its middle part threaded to the end of the horizontal arm, its upper end abutting against the lower side of the steel plate, and its lower end equipped with a crossbar or handwheel. The crossbar is perpendicular to the screw and forms a T-shaped structure with the screw. The handwheel is coaxial with the screw.
[0014] On the other hand, embodiments of the present invention also provide a beveling method, the method comprising: When processing begins, an extension plate is set at the beginning of the steel plate. The extension plate is located at the beginning of the crawling structure's movement trajectory, and there is a gap between the bevel structure and the beginning of the steel plate. When the processing is almost complete, an extension plate is installed at the end of the steel plate. The extension plate is located at the end of the crawling structure's movement trajectory, and the crawling structure can move onto the extension plate. When the crawling structure moves onto the extension plate and abuts against the limiting mechanism, the crawling structure is located between the two upper fixed rods, and the bevel structure is located on the outside of the extension plate and away from the steel plate.
[0015] The method of this patent is used to process steel plates for wind turbine towers. The beveling structure is a plasma gun. There are two or three plasma guns. When processing a deeper beveling on one side of the steel plate, three plasma guns are used. When processing a beveling on the other side of the steel plate, two plasma guns are used. When using three plasma guns, from the end to the beginning of the crawling structure, the three plasma guns are arranged vertically, diagonally downward from the outside to the inside, and diagonally downward from the inside to the outside.
[0016] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: The embodiments of the present invention provide a beveling device and a beveling method, which can realize the automatic processing of the beginning and end of the steel plate. The two upper fixing rods have at least three functions: first, to cooperate with the lower clamping mechanism to fix the extension plate; second, to prevent the crawling structure from slipping off the extension plate; and third, to guide the crawling structure. In addition, the extension plate structure of this patent is simple and easy to assemble and disassemble. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the beveling device on the extension plate located at the beginning of the beveling trolley; Figure 2 yes Figure 1 A structural diagram showing the beveling trolley moving between the extension plate and the steel plate; Figure 3 This is a schematic diagram of the beveling device as the beveling trolley moves completely onto the steel plate; Figure 4 yes Figure 3 A structural diagram showing the beveling trolley moving between the extension plate and the steel plate; Figure 5 This is a schematic diagram of the beveling device with the beveling trolley positioned on the extension plate at the end. Figure 6 This is a diagram showing the usage status of the beveling device when the end of a steel plate has a bevel. Figure 7 This is a usage diagram when there are two extension boards; Figure 8 This is a schematic diagram of the structure combining the extension plate and the steel plate; Figure 9 This is a top view of the extension plate; Figure 10 This is a side view of the extension plate; Figure 11 This is a schematic diagram of the structure of the extension plate combined with the steel plate when the end of the steel plate has a bevel. Figure 12 This is a dimension drawing of the beveling equipment.
[0018] In the diagram: 1 steel plate, 2 bevel, 3 crawling structure, 4 bevel structure, 5 extension plate, 6 limiting mechanism, 7 upper fixing rod, 8 lower clamping mechanism, 9 hollow hole, 10 inner guide structure, 11 bracket, 12 outer guide wheel; 81 L-shaped arm, 82 screw, 83 crossbar. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.
[0020] Example 1 See Figure 1-11 For ease of description, this patent defines the following: the side closer to the bevel 2 to be processed is the outer side, and the end at which the bevel 2 is processed is the starting end.
[0021] The beveling device includes a beveling trolley, a steel plate support platform, and an extension plate 5. The steel plate support platform is horizontally positioned and supports the steel plate 1. The beveling trolley includes a crawling structure 3 and a beveling structure 4 on it. The crawling structure 3 is positioned along the direction of the bevel 2 to be processed and can move along this direction. For details of the crawling structure 3, please refer to the description in patent application number CN201210185746.5. The beveling structure 4 is located outside the crawling structure 3 at the bevel 2 to be processed, and can be one or more of the following beveling equipment: plasma, acetylene flame, laser, etc.
[0022] The extension plate 5 is detachably mounted at the beginning or end of the steel plate 1. It is located at the beginning or end of the crawling structure 3's travel path, and is positioned along the direction of the travel path. It connects to the end (beginning or end) of the steel plate 1. A limiting mechanism 6 (used to block and limit the crawling structure 3 and prevent it from falling) is provided on the upper side of the end furthest from the steel plate 1. Two upper fixing rods 7 are respectively provided on the upper sides of both ends in the width direction, and a lower clamping mechanism 8 is provided on the lower side. Its upper side is flush with the upper side of the steel plate 1. Specifically, the extension plate 5 is a rectangular plate located inside the bevel 2. The two upper fixing rods 7 serve at least three functions: first, to cooperate with the lower clamping mechanism 8 to fix the extension plate 5; second, to prevent the crawling structure 3 from slipping off the extension plate 5; and third, to guide the crawling structure 3 (especially at the beginning, when the outer guide wheel 12 has not yet been activated).
[0023] The upper fixing rod 7 is positioned along the direction of the travel path, with its end near the steel plate 1 extending towards the steel plate 1 relative to the extension plate 5 to form an extension portion. The extension portion rests against the upper side of the steel plate 1, and its length is preferably greater than 10cm to ensure stability. The lower clamping mechanism 8 is located below the extension portion, clamping the lower side of the steel plate 1, and cooperates with the upper fixing rod 7 to fix the extension plate 5 onto the steel plate 1.
[0024] When processing begins, an extension plate 5 is set at the beginning of the steel plate 1, the crawling structure 3 is placed on the extension plate 5, and there is a gap between the bevel structure 4 and the beginning of the steel plate 1.
[0025] When the extension plate 5 is located at the end of the steel plate 1, the crawling structure 3 can move onto the extension plate 5. When the crawling structure 3 moves onto the extension plate 5 and abuts against the limiting mechanism 6, the crawling structure 3 is located between the two upper fixed rods 7, and the bevel structure 4 is located outside the extension plate 5 and away from the steel plate 1.
[0026] Specifically, the distance between the limiting mechanism 6 and the end of the extension plate 5 closest to the steel plate 1 is B1; the distance between the two upper fixing rods 7 is B2; and the distance between the end of the upper fixing rod 7 furthest from the steel plate 1 and the limiting mechanism 6 is B3. The width of the crawling structure 3 is C1, and its length is C2; the distance between the bevel structure 4 and the end of the crawling structure 3 is C3, and the distance between the bevel structure 4 and the beginning of the crawling structure 3 is C4. B2 > C1, B3 < C2, B1 > C3, B1 > C4.
[0027] Specifically, when processing the long side of the steel plate 1, the extension plate 5 is positioned on the wide side of the steel plate 1 and close to the bevel 2 to be processed.
[0028] Specifically, the upper fixing rod 7 is a rectangular rod, horizontally positioned on its lower side, and welded and fixed to the extension plate 5. The limiting mechanism 6 is located at the middle of the end of the extension plate 5 away from the steel plate 1, and is perpendicular to the extension plate 5.
[0029] The lower clamping mechanism 8 includes an L-shaped arm 81 and a screw 82. The L-shaped arm 81 is located on the lower side of the extension plate 5, close to the steel plate 1, and includes a vertical arm and a horizontal arm. The vertical arm is vertically oriented, with its upper end fixed to the lower side of the extension plate 5. The horizontal arm is located on the side of the lower end of the vertical arm close to the steel plate 1, along the direction of the travel path, directly below the two upper fixed rods 7, with its end directly below the steel plate 1. The screw 82 is vertically oriented, with its middle section threaded to the end of the horizontal arm. Its upper end rests against the lower side of the steel plate 1, and its lower end has a crossbar 83 or a handwheel, etc. The crossbar 83 is perpendicular to the screw 82 and forms a T-shape with the screw 82. The handwheel is coaxial with the screw 82. Of course, the lower clamping mechanism 8 can also adopt other structures, such as an elastic clamping structure.
[0030] Example 2 Example 2 provides a beveling device, the structure of which is basically the same as that of Example 1, except that: in this example, there is only one extension plate 5. At the beginning of processing, the extension plate 5 is placed at the beginning of the steel plate 1. When processing is almost complete, the extension plate 5 at the beginning is removed, and then the extension plate 5 is placed at the end of the steel plate 1.
[0031] Example 3 See Figure 7 Example 3 provides a beveling device, whose structure is basically the same as that of Example 1, except that: in this example, there are two extension plates 5; the two extension plates 5 are respectively located at the beginning and end of the steel plate 1. Therefore, this solution does not require repeated disassembly and assembly of the extension plates 5.
[0032] Example 4 See Figure 8 and 11 Example 4 provides a beveling device, the structure of which is basically the same as that of Example 1, except that: in this embodiment, the extension plate 5 includes a first extension plate and a second extension plate. The end of the first extension plate near the steel plate 1 is a vertically arranged plane, and the end of the second extension plate near the steel plate 1 is an inclined surface that cooperates with the bevel 2 (this design makes the extension plate 5 more securely fixed and facilitates the movement of the crawling structure 3). If the end of the steel plate 1 that connects to the extension plate 5 is the bevel 2, then the second extension plate is fixed to the steel plate 1; otherwise, the first extension plate is fixed to the steel plate 1.
[0033] Example 5 See Figure 1-7 Example 5 provides a beveling device, whose structure is basically the same as that of Example 1, except that: the crawling structure 3 in this example has an inner guide structure 10 on its inner side and a bracket 11 on its outer side. The inner guide structure 10 includes multiple (e.g., 2-4) inner guide wheels arranged side by side in the direction of the movement trajectory, and an outer guide wheel 12, specifically an L-shaped structure, is provided at the outer end of the bracket 11. Both the inner guide wheel and the outer guide wheel 10 are vertically arranged. When processing begins, the inner guide wheel abuts against the outer side of the inner upper fixing rod 7 to achieve guidance. When the crawling structure 3 is completely on the steel plate 1, the outer guide wheel 12 abuts against the outer end of the steel plate 1 to control the movement trajectory. Specifically, the distance between the inner upper fixing rod 7 and the outer end of the steel plate 1 is L1, and the distance between the inner upper fixing rod 7 and the outer guide wheel 12 is L2, where L1=L2. Specifically, the bracket 11 is located at the end of the crawling structure 3.
[0034] Example 6 Example 6 provides a beveling device, whose structure is basically the same as that of Example 1, except that: in this example, the extension plate 5 has a perforated hole 9 in its middle along its direction, and its thickness is thinner than that of the steel plate 1. This design can reduce the weight of the extension plate 5. Specifically, the perforated hole 9 is an oblong hole, which does not affect the movement of the crawling structure 3.
[0035] Example 7 See Figure 1-11 Example 7 provides a beveling device, the structure of which is basically the same as that of Example 1, except that: in this example, the extension plate 5 is provided with an upper fixing rod 7 only on the part close to the steel plate 1.
[0036] Example 8 Example 8 provides a beveling device, the structure of which is basically the same as that of Example 1, except that the limiting mechanism 6 in this example is an arc-shaped plate (an upward arc-shaped protrusion). The end of the extension plate 5 away from the steel plate 1 is rounded; during processing, the wires 13 and / or pipes of the beveling trolley are placed on the extension plate 5 to avoid being cut by the steel plate 1.
[0037] Example 9 Example 9 provides a beveling device. In this example, a steel plate 1 is arranged in the front-to-back direction, with its rear end being the end. A beveling structure 4 is located to the left of a crawling structure 3, which moves in the front-to-back direction. An outer guide wheel 12 is located to the left of the crawling structure 3. An extension plate 5 is located at the rear end of the steel plate 1. Both the extension plate 5 and the upper fixing rod 7 are arranged in the front-to-back direction. The upper fixing rod 7 is located at the front of the extension plate 5, and its front end extends forward relative to the extension plate 5. An L-shaped arm 81 is located at the lower front of the extension plate 5. When processing begins, the beveling structure 4 is located in front of the steel plate 1. When the crawling structure 3 moves to the extension plate 5 and abuts against the limiting mechanism 6, the beveling structure 4 is located to the left of the extension plate 5 and behind the steel plate 1. A bracket 11 is located at the rear end of the crawling structure 3.
[0038] Example 10 See Figure 1-11 Example 10 provides a beveling method using the beveling apparatus of Examples 1-9. The method includes: When processing begins, an extension plate is installed at the beginning of the steel plate. The extension plate is located at the beginning of the crawling structure's movement trajectory, and there is a gap between the bevel structure and the beginning of the steel plate.
[0039] When the processing is almost complete, an extension plate is installed at the end of the steel plate. The extension plate is located at the end of the crawling structure's movement trajectory, and the crawling structure can move onto the extension plate. When the crawling structure moves onto the extension plate and abuts against the limiting mechanism, the crawling structure is located between the two upper fixed rods, and the bevel structure is located on the outside of the extension plate and away from the steel plate.
[0040] Example 11 Example 11 provides a beveling method for processing steel plates used in the fabrication of wind turbine towers. The beveling structure is a plasma gun. Two or three plasma guns are used. Three plasma guns are used to process a deeper beveling on one side of the steel plate, while two plasma guns are used to process the beveling on the other side. When using three plasma guns, they are arranged sequentially from the end to the beginning of the crawling structure: vertically, diagonally downwards from the outside to the inside, and diagonally downwards from the inside to the outside. Of course, the device and method of this patent can also be used for processing other products, and the beveling structure 4 can be designed as other structures as needed.
[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A beveling device, comprising a beveling trolley and a steel plate support platform, wherein the beveling trolley includes a crawling structure (3) and a beveling structure (4) thereon, the beveling structure (4) being located outside the crawling structure (3); characterized in that, The beveling device also includes an extension plate (5) detachably disposed at the beginning or end of the steel plate (1); the extension plate (5) is located at the beginning or end of the walking trajectory of the crawling structure (3), and is arranged along the direction of the walking trajectory. It is connected to the end of the steel plate (1), and a limiting mechanism (6) is provided on the upper side of the end away from the steel plate (1). Two upper fixing rods (7) are respectively provided on the upper sides of the two ends in the width direction, and a lower clamping mechanism (8) is provided on the lower side. Its upper side is flush with the upper side of the steel plate (1); the upper fixing rod (7) is arranged along the direction of the walking trajectory, and its end near the steel plate (1) extends towards the steel plate (1) relative to the extension plate (5) to form an extension; the extension abuts against the upper side of the steel plate (1), and the lower clamping mechanism (8) is located below the extension and is clamped on the lower side of the steel plate (1); When processing begins, an extension plate (5) is provided at the beginning of the steel plate (1), the crawling structure (3) is placed on the extension plate (5), and there is a gap between the bevel structure (4) and the beginning of the steel plate (1). When the extension plate (5) is located at the end of the steel plate (1), the crawling structure (3) can move onto the extension plate (5); when the crawling structure (3) moves onto the extension plate (5) and abuts against the limiting mechanism (6), the crawling structure (3) is located between the two upper fixed rods (7), and the bevel structure (4) is located outside the extension plate (5) and away from the steel plate (1).
2. The beveling device according to claim 1, characterized in that, When processing the long side of the steel plate (1), the extension plate (5) is placed on the wide side of the steel plate (1) and close to the bevel (2) to be processed; when processing the wide side of the steel plate (1), the extension plate (5) is placed on the long side of the steel plate (1) and close to the bevel (2) to be processed; the number of extension plates (5) is one or two; when the number of extension plates (5) is one, when processing begins, the extension plate (5) is placed at the beginning of the steel plate (1); when processing is almost completed, the extension plate (5) is placed at the end of the steel plate (1); when the number of extension plates (5) is two, the two extension plates (5) are placed at the beginning and end of the steel plate (1) respectively.
3. The beveling apparatus according to claim 2, characterized in that, The extension plate (5) includes a first extension plate and a second extension plate. The end of the first extension plate near the steel plate (1) is a vertically arranged plane, and the end of the second extension plate near the steel plate (1) is an inclined surface that cooperates with the bevel (2). If the end of the steel plate (1) that connects with the extension plate (5) is a bevel (2), then the second extension plate is fixed on the steel plate (1); otherwise, the first extension plate is fixed on the steel plate (1).
4. The beveling apparatus according to claim 1, characterized in that, The crawling structure (3) has an inner guide structure (10) on its inner side and a bracket (11) on its outer side. The inner guide structure (10) includes multiple inner guide wheels arranged side by side in the direction of the movement trajectory. The bracket (11) has an outer guide wheel (12) at its outer end. The inner guide wheel and the outer guide wheel (10) are both arranged vertically. When processing begins, the inner guide wheel rests against the outer side of the inner upper fixing rod (7). When the crawling structure (3) is completely on the steel plate (1), the outer guide wheel (12) rests against the outer end of the steel plate (1). The distance between the inner upper fixing rod (7) and the outer end of the steel plate (1) is L1, and the distance between the inner upper fixing rod (7) and the outer guide wheel (12) is L2, where L1 = L2.
5. The beveling apparatus according to claim 4, characterized in that, The extension plate (5) is a rectangular plate with a perforated hole (9) in its middle along its direction. It is located inside the bevel (2) and its thickness is thinner than that of the steel plate (1). The upper fixing rod (7) is a rectangular rod with its lower side set horizontally and welded to the extension plate (5). The upper fixing rod (7) is only provided on the part of the extension plate (5) near the steel plate (1), and the length of the extension is greater than 10cm.
6. The beveling apparatus according to claim 5, characterized in that, The distance between the limiting mechanism (6) and the end of the extension plate (5) near the steel plate (1) is B1, the distance between the two upper fixing rods (7) is B2, and the distance between the end of the upper fixing rod (7) away from the steel plate (1) and the limiting mechanism (6) is B3; the width of the crawling structure (3) is C1, and its length is C2; the distance between the bevel structure (4) and the end of the crawling structure (3) is C3, and the distance between the bevel structure (4) and the beginning of the crawling structure (3) is C4; B2 > C1, B3 < C2, B1 > C3, B1 > C4.
7. The beveling apparatus according to claim 1, characterized in that, The limiting mechanism (6) is located in the middle of the end of the extension plate (5) away from the steel plate (1), and is set perpendicular to the extension plate (5). It is an arc-shaped plate. The end of the extension plate (5) away from the steel plate (1) is rounded. During processing, the wire (13) and / or pipeline of the beveling trolley are placed on the extension plate (5).
8. The beveling apparatus according to claim 1, characterized in that, The lower clamping mechanism (8) includes an L-shaped arm (81) and a screw (82). The L-shaped arm (81) is located on the lower side of the extension plate (5) and is close to the steel plate (1). It includes a vertical arm and a horizontal arm. The vertical arm is set vertically and its upper end is fixed to the lower side of the extension plate (5). The horizontal arm is located on the side of the lower end of the vertical arm close to the steel plate (1). It is set along the direction of the travel trajectory and is located directly below the two upper fixed rods (7). Its end is located directly below the steel plate (1). The screw (82) is set vertically. Its middle part is threaded to the end of the horizontal arm. Its upper end abuts against the lower side of the steel plate (1). Its lower end is provided with a crossbar (83) or a handwheel. The crossbar (83) is perpendicular to the screw (82) and forms a T-shaped structure with the screw (82). The handwheel is coaxial with the screw (82).
9. A method for beveling using the beveling apparatus as described in any one of claims 1-8, characterized in that, The method includes: When processing begins, an extension plate (5) is set at the beginning of the steel plate (1). The extension plate (5) is located at the beginning of the movement trajectory of the crawling structure (3). There is a gap between the bevel structure (4) and the beginning of the steel plate (1). When the processing is almost complete, an extension plate (5) is set at the end of the steel plate (1). The extension plate (5) is located at the end of the movement trajectory of the crawling structure (3). The crawling structure (3) can move onto the extension plate (5). When the crawling structure (3) moves onto the extension plate (5) and abuts against the limiting mechanism (6), the crawling structure (3) is located between the two upper fixed rods (7), and the bevel structure (4) is located outside the extension plate (5) and away from the steel plate (1).
10. The method according to claim 9, characterized in that, The steel plate used for processing wind turbine towers is a bevel structure (4) that is a plasma gun. The number of plasma guns is two or three. When processing the deeper bevel (2) on one side of the steel plate (1), three plasma guns are used. When processing the bevel (2) on the other side of the steel plate (1), two plasma guns are used. When using three plasma guns, from the end to the beginning of the crawling structure (3), the three plasma guns are set vertically, diagonally downward from the outside to the inside, and diagonally downward from the inside to the outside.