Large-scale tower barrel butt joint surface welding processing technology

Abstract

The invention relates to the technical field of wind power generation tower drum manufacturing, in particular to a large tower drum butt joint face welding machining technology which comprises the steps that a steel plate is cut to form a first fan-shaped plate and a second fan-shaped plate; the first fan-shaped plate is rolled into a conical cylinder shape through a plate rolling machine, and the conical cylinder is formed and welded to form a first conical cylinder; the second fan-shaped plate is rolled into a conical cylinder shape through the plate rolling machine, and the conical cylinder is formed and welded to form a second conical cylinder; cutting at least one end of the first conical cylinder to form a first wave butt joint surface; at least one end of the second conical cylinder is cut to form a second wave butt joint surface; and the first wave butt joint face and the second wave butt joint face are in butt joint to form the tower barrel section. In the process, the first wave butt joint face and the second wave butt joint face are arranged at the butt joint position of the first conical cylinder and the second conical cylinder in a cutting mode, the length of an actual welding face is prolonged through the first wave butt joint face and the second wave butt joint face, and the connection strength of the first conical cylinder and the second conical cylinder is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power tower manufacturing, and in particular to a large tower butt surface welding process. Background Art

[0002] Wind power towers are generally conical structures, gradually becoming thinner from bottom to top, with a base diameter of about 4-6 meters, a top diameter of about 2-3 meters, and a tower height of about 80-120 meters. In order to facilitate manufacturing, wind power towers are composed of multiple tower sections.

[0003] When welding adjacent tower sections of traditional wind power towers, they are generally welded in a flat-end butt-jointed manner, that is, the end face of the tower section is flat, and the flat end faces of adjacent tower sections are welded. The welding contact surface is only as large as the circumferential surface of the tower section. This welding method does not have sufficient connection strength. In order to improve the connection strength between tower sections, the only way to reduce cold welds is to improve the welding accuracy. The fewer cold welds, the higher the connection strength. However, blindly improving the welding accuracy will only increase the difficulty of welding in disguise, and quality control is very difficult. Summary of the invention

[0004] The purpose of the present invention is to solve the problems pointed out in the background technology and to propose a large tower butt surface welding process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A large tower butt surface welding process comprises the following steps:

[0007] s1, cutting the steel plate to form a first sector-shaped plate and a second sector-shaped plate;

[0008] s2. Rolling the first fan-shaped plate into a cone-shaped cylinder by a plate rolling machine, and performing cone-shaped cylinder welding to form a first cone-shaped cylinder; rolling the second fan-shaped plate into a cone-shaped cylinder by a plate rolling machine, and performing cone-shaped cylinder welding to form a second cone-shaped cylinder;

[0009] s3, cutting at least one end of the first cone to form a first wave butt joint surface; cutting at least one end of the second cone to form a second wave butt joint surface;

[0010] s4. Butt the first wave butt joint surface with the second wave butt joint surface to form a tower section.

[0011] In s3, the first cone and the second cone are cut simultaneously by the cutting mechanism, so that the first wave butt joint surface and the second wave butt joint surface are formed simultaneously.

[0012] When cutting the steel plate in s1, a first remaining portion is reserved at the end of the first sector-shaped plate so that the end of the first cone forms a first cone portion; a second remaining portion is reserved at the end of the second sector-shaped plate so that the end of the second cone forms a second cone portion, and the first cone portion and the second cone portion are completely the same in shape and size;

[0013] In s3, the cutting mechanism simultaneously cuts the first cone cylinder portion and the second cone cylinder portion to form a first wave butt joint surface and a second wave butt joint surface.

[0014] The cutting mechanism has a first movement direction and a second movement direction when working. The first movement direction is reciprocating along the axial direction of the first cone cylinder, and the second movement direction is rotating along the axis of the first cone cylinder.

[0015] The first cone cylinder and the second cone cylinder are coaxially supported horizontally and close to each other by a supporting mechanism, and the supporting mechanism can make the first cone cylinder and the second cone cylinder rotate around the axis, the cutting mechanism includes a horizontally arranged screw rod, one end of the screw rod is connected to a first rotating motor that can drive the screw rod to rotate, a nut seat is threadedly connected to the screw rod, and a first cutting head and a second cutting head are installed on the nut seat, the first cutting head is used for cutting the first cone cylinder part, and the second cutting head is used for cutting the second cone cylinder part.

[0016] The first cutting head and the second cutting head are both laser cutting or water jet cutting.

[0017] The supporting mechanism includes a first leg and a second leg which are vertically arranged, the first leg being rotatably connected to a first supporting rod coaxial with the first cone, the second leg being rotatably connected to a second supporting rod coaxial with the first cone, the first supporting rod and the second supporting rod being installed together, the first cone being coaxially supported on the first supporting rod through a plurality of supporting members, and the second cone being coaxially supported on the second supporting rod through a plurality of supporting members.

[0018] A first movable base is provided at the bottom of the first leg, and a second movable base is provided at the bottom of the second leg. One end of the first support rod has an inserted end, and one end of the second support rod has an inserting end. The inserting end is slidably connected to the inserted end, and one of the first support rod and the second support rod is transmission-connected to a second rotating motor.

[0019] The support member comprises a support tube, and at least three telescopic support rods distributed at equal angles are installed on the circumference of the support tube.

[0020] The invention proposes a large tower butt joint surface welding processing technology, which has the beneficial effect that in this process, a first wave butt joint surface and a second wave butt joint surface are cut and set at the position where the first cone cylinder and the second cone cylinder are butt jointed, and the length of the actual welding surface is extended by the first wave butt joint surface and the second wave butt joint surface, thereby improving the connection strength between the first cone cylinder and the second cone cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the present invention before cutting;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-section structure;

[0023] Figure 3 It is a schematic diagram of the support structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure after cutting of the present invention;

[0025] Figure 5 It is a schematic diagram of the welding structure of the present invention.

[0026] In the figure: a first cutting head 1, a screw rod 2, a nut seat 3, a second cutting head 4, a first rotating motor 5, a cutting mechanism 6, a supporting mechanism 7, a first cone 8, a second cone 9, a first cone portion 10, a second cone portion 11, a telescopic support rod 12, a supporting tube 13, a first support rod 14, a second rotating motor 15, a first leg 16, a first movable base 17, a second movable base 18, a second leg 19, a second support rod 20, an insertion end 21, an inserted end 22, a first wave docking surface 23, a second wave docking surface 24, and a tower section 25. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-Figure 5 A large tower butt joint welding process comprises the following steps:

[0029] s1, cutting the steel plate to form a first sector-shaped plate and a second sector-shaped plate;

[0030] s2. Roll the first sector-shaped plate into a cone-shaped cylinder by a plate rolling machine, and perform cone-shaped welding to form a first cone-shaped cylinder 8; roll the second sector-shaped plate into a cone-shaped cylinder by a plate rolling machine, and perform cone-shaped welding to form a second cone-shaped cylinder 9;

[0031] s3, cutting at least one end of the first cone 8 to form a first wave docking surface 23; cutting at least one end of the second cone 9 to form a second wave docking surface 24;

[0032] s4. The first wave butt joint surface 23 and the second wave butt joint surface 24 are butt jointed to form a tower section 25.

[0033] In this process, the first wave butt joint surface 23 and the second wave butt joint surface 24 are cut and set at the position where the first cone cylinder 8 and the second cone cylinder 9 are butt jointed. The length of the actual welding surface is extended by the first wave butt joint surface 23 and the second wave butt joint surface 24, thereby improving the connection strength of the first cone cylinder 8 and the second cone cylinder 9.

[0034] Meanwhile, in the present process, the first wave butt joint surface 23 and the second wave butt joint surface 24 are directly cut on the end surfaces of the formed first cone 8 and the second cone 9, so as to effectively prevent the problem of deformation and curling of the wave butt joint surfaces.

[0035] In s3, the first cone 8 and the second cone 9 are cut simultaneously by the cutting mechanism 6, so that the first wave docking surface 23 and the second wave docking surface 24 are formed simultaneously. In this process, the simultaneous cutting method is adopted to cut the first cone 8 and the second cone 9 simultaneously, so that the shapes of the first wave docking surface 23 and the second wave docking surface 24 will be completely consistent, which is convenient for the subsequent docking work.

[0036] refer to Figure 1 When cutting the steel plate in s1, a first remaining portion is reserved at the end of the first sector plate, so that the end of the first cone 8 forms a first cone portion 10; a second remaining portion is reserved at the end of the second sector plate, so that the end of the second cone 9 forms a second cone portion 11, and the first cone portion 10 and the second cone portion 11 are completely the same in shape and size;

[0037] In s3, the cutting mechanism 6 cuts the first cone portion 10 and the second cone portion 11 simultaneously to form a first wave-shaped butt joint surface 23 and a second wave-shaped butt joint surface 24.

[0038] The tower is a conical structure. In this process, the first remaining part and the second remaining part are reserved in advance so that the formed cone has completely identical first cone part 10 and second cone part 11. In this way, when the first cone part 10 and the second cone part 11 are cut at the same time, it is ensured that the wave surface after cutting can conform to the shape of the cone and be completely docked and matched.

[0039] As a cutting method, the cutting mechanism 6 has a first movement direction and a second movement direction when working. The first movement direction is axial reciprocating along the first cone cylinder 8, and the second movement direction is rotating along the axis of the first cone cylinder 8. The cutting mechanism 6 moves left and right while rotating around the axis, so that a sinusoidal wave surface can be better cut.

[0040] As a cutting method, the first cone 8 and the second cone 9 are coaxially supported horizontally and close to each other by the support mechanism 7, and the support mechanism 7 can make the first cone 8 and the second cone 9 rotate around the axis. The cutting mechanism 6 includes a horizontally arranged screw rod 2, one end of which is connected to a first rotating motor 5 that can drive it to rotate, and a nut seat 3 is threadedly connected to the screw rod 2. The nut seat 3 is installed with a first cutting head 1 and a second cutting head 4. The first cutting head 1 is used for cutting the first cone part 10, and the second cutting head 4 is used for cutting the second cone part 11. The first rotating motor 5 drives the screw rod 2 to rotate forward and reverse through the forward and reverse motions, so that the first cutting head 1 and the second cutting head 4 reciprocate left and right at the same time. At the same time, the first cone 8 and the second cone 9 are rotated to complete the cutting of the first wave docking surface 23 and the second wave docking surface 24.

[0041] By adopting this simultaneous cutting method, it can be ensured that the positions and shapes of the first wave docking surface 23 and the second wave docking surface 24 are completely consistent, and the docking work can be completed by directly translating one of the cones after the cutting is completed.

[0042] As an implementation manner, the first cutting head 1 and the second cutting head 4 are both laser cutting or water jet cutting.

[0043] For further reference, Figure 2 The supporting mechanism 7 includes a first support leg 16 and a second support leg 19 which are vertically arranged. The first support leg 16 is rotatably connected to a first support rod 14 which is coaxial with the first cone 8. The second support leg 19 is rotatably connected to a second support rod 20 which is coaxial with the first cone 8. The first support rod 14 and the second support rod 20 are installed together. The first cone 8 is coaxially supported on the first support rod 14 through a plurality of support members. The second cone 9 is coaxially supported on the second support rod 20 through a plurality of support members. The first cone 8 and the second cone 9 are rotated around the first support rod 14 and the second support rod 20.

[0044] Furthermore, a first movable base 17 is provided at the bottom of the first leg 16, and a second movable base 18 is provided at the bottom of the second leg 19. One end of the first support rod 14 has an inserted end 22, and one end of the second support rod 20 has an inserting end 21. For example, the inserting end 21 is a polygonal cylinder, and the inserting end 21 is slidably connected to the inserted end 22. The inserted end 22 is a polygonal hole. One of the first support rod 14 and the second support rod 20 is transmission-connected with a second rotating motor 15, and the first support rod 14 is driven to rotate by the second rotating motor 15, and the second support rod 20 is driven to rotate by the first support rod 14, so that a cone 8 and a second cone 9 rotate around the axis of the first support rod 14 and the second support rod 20. After the wave butt joint surface is cut, the first cone 8 is pushed to move toward the second cone 9, so that the first wave butt joint surface 23 and the second wave butt joint surface 24 are butted. In this way, the butt joint work can be carried out after the cutting is completed, thereby reducing the complexity of welding.

[0045] refer to Figure 3 The support member includes a support tube 13, and at least three telescopic support rods 12 distributed at equal angles are installed on the circumference of the support tube 13. The telescopic support rods 12 are extended at the same time, so that the first cone tube 8 and the second cone tube 9 are coaxially supported on the first support rod 14 and the second support rod 20.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution, conception, and design obtained by equivalent replacement or modification of the technical solution and inventive concept of the present invention by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A large tower butt joint welding process, characterized in that: The steps include: s1, cutting the steel plate to form a first sector-shaped plate and a second sector-shaped plate; s2, rolling the first fan-shaped plate into a cone-shaped cylinder by a plate rolling machine, and performing cone-shaped cylinder welding to form a first cone (8); rolling the second fan-shaped plate into a cone-shaped cylinder by a plate rolling machine, and performing cone-shaped cylinder welding to form a second cone (9); s3, cutting at least one end of the first cone (8) to form a first wave-jointed surface (23); cutting at least one end of the second cone (9) to form a second wave-jointed surface (24); s4. Butt the first wave butt joint surface (23) and the second wave butt joint surface (24) to form a tower section (25).

2. A large tower butt joint welding process according to claim 1, characterized in that: In step s3, the first cone (8) and the second cone (9) are cut simultaneously by the cutting mechanism (6), so that the first wave-jointed surface (23) and the second wave-jointed surface (24) are formed simultaneously.

3. A large tower butt joint welding process according to claim 2, characterized in that: When cutting the steel plate in s1, a first remaining portion is reserved at the end of the first sector-shaped plate so that the end of the first cone (8) forms a first cone portion (10); a second remaining portion is reserved at the end of the second sector-shaped plate so that the end of the second cone (9) forms a second cone portion (11), and the first cone portion (10) and the second cone portion (11) are completely the same in shape and size; In s3, the cutting mechanism (6) simultaneously cuts the first cone cylinder portion (10) and the second cone cylinder portion (11) to form a first wave-shaped butt joint surface (23) and a second wave-shaped butt joint surface (24).

4. A large tower butt joint welding process according to claim 3, characterized in that: When the cutting mechanism (6) is in operation, it has a first movement direction and a second movement direction, wherein the first movement direction is reciprocating along the axial direction of the first cone cylinder (8), and the second movement direction is rotating along the axis of the first cone cylinder (8).

5. A large tower butt joint welding process according to claim 3, characterized in that: The first cone cylinder (8) and the second cone cylinder (9) are coaxially supported and close to each other by a supporting mechanism (7), and the supporting mechanism (7) can make the first cone cylinder (8) and the second cone cylinder (9) rotate around the axis. The cutting mechanism (6) comprises a horizontally arranged screw rod (2), one end of which is connected to a first rotating motor (5) capable of driving the screw rod to rotate. A nut seat (3) is threadedly connected to the screw rod (2), and a first cutting head (1) and a second cutting head (4) are installed on the nut seat (3). The first cutting head (1) is used for cutting the first cone cylinder part (10), and the second cutting head (4) is used for cutting the second cone cylinder part (11).

6. A large tower butt joint welding process according to claim 5, characterized in that: The first cutting head (1) and the second cutting head (4) are both laser cutting or water jet cutting.

7. A large tower butt joint welding process according to claim 5, characterized in that: The support mechanism (7) comprises a first support leg (16) and a second support leg (19) which are vertically arranged; the first support leg (16) is rotatably connected to a first support rod (14) which is coaxial with the first cone cylinder (8); the second support leg (19) is rotatably connected to a second support rod (20) which is coaxial with the first cone cylinder (8); the first support rod (14) and the second support rod (20) are installed together; the first cone cylinder (8) is coaxially supported on the first support rod (14) through a plurality of support members; and the second cone cylinder (9) is coaxially supported on the second support rod (20) through a plurality of support members.

8. A large tower butt joint welding process according to claim 7, characterized in that: A first movable base (17) is provided at the bottom of the first leg (16), and a second movable base (18) is provided at the bottom of the second leg (19). One end of the first support rod (14) has an inserted end (22), and one end of the second support rod (20) has an inserted end (21). The inserted end (21) is slidably connected to the inserted end (22), and one of the first support rod (14) and the second support rod (20) is transmission-connected to a second rotating motor (15).

9. A large tower butt joint welding process according to claim 7, characterized in that: The support member comprises a support tube (13), and at least three telescopic support rods (12) distributed at equal angles are installed on the circumference of the support tube (13).

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