Axial splicing process of arc segments of a teardrop-shaped wind tower

Abstract

The present invention relates to an axial splicing process for the circular arc section of a teardrop-shaped wind tower, and the specific steps include: S1, uniformly performing beveling processing on the side ends of the circular arc section, the arc-starting plate, and the lead-out plate; S2, positioning and adjusting the support device; S3, setting the upper and lower ends of the two support blocks in corresponding horizontal positions in sequence; S4, marking the center lines inside the openings of the two circular arc sections; S5, rotating the clamping end of the circular arc section's outer tightening structure to the outer end of the circular arc section, and applying a clamping force to the outer end of the circular arc section; S6, gradually moving one circular arc section toward another circular arc section by moving and adjusting the support device; S7, vertically setting a support block on the adjustment support device at a position directly above the support positioning cylinder; S8, synchronously rotating the roller frames on multiple adjustment support devices in the forward direction; S9, cutting and removing the arc-starting plate and the lead-out plate from the side ends of the circular arc section. The present invention has the following advantages: ensuring the structural strength and assembly accuracy of the circular arc section.

Description

Technical field:

[0002] The invention relates to the field of teardrop-shaped wind towers, in particular to an axial splicing process of circular arc segments of teardrop-shaped wind towers. Background technology:

[0004] A teardrop-shaped wind tower is generally decomposed into three arc segments, which are welded together through longitudinal seams to complete the teardrop-shaped wind tower. The length of each arc segment is not less than 10 meters, so the arc segment needs to be made of multiple arc segments horizontally spliced ​​with circumferential welds. Since the circumferential weld is an open arc-shaped structure, the arc segment is placed horizontally on a fixed frame and then manually welded. This has technical defects such as high difficulty in assembly and low assembly accuracy, and manual welding is time-consuming and labor-intensive.

[0005] At present, there is also a method of fixing the arc segment on the roller frame by spot welding, and the arc segment ring weld is welded by rotating the roller frame, and finally the arc segment is cut and separated from the roller frame by a cutting machine. The arc segment is first fixed to the roller frame by spot welding, so that the thermal stress on the side end face of the arc segment is concentrated. Subsequently, it is welded with other arc segment sheets. Multiple welding is heated, which affects the overall structural strength of the teardrop-shaped wind tower; secondly, since the arc segment is an open structure, metal solution overflow will occur at the starting position and the end position of the welded arc segment, forming a welding forming defect. At the same time, welding shrinkage is prone to occur at the starting position and the end position, so deformation occurs at both ends of the ring weld of the arc segment, causing a change in curvature. Therefore, when multiple arc segments are spliced, the matching accuracy of the ring weld becomes lower and lower. Summary of the invention:

[0007] The purpose of the present invention is to overcome the above shortcomings and provide an axial splicing process for the arc segment of a teardrop-shaped wind tower to ensure the structural strength and assembly accuracy of the arc segment and avoid the curvature change of the arc segment after welding.

[0008] The purpose of the present invention is achieved through the following technical solution: an axial splicing process of a teardrop-shaped wind tower arc segment, the specific steps comprising:

[0009] S1. Weld an arc-starting plate at the starting position of the side end of the arc segment, and weld a lead-out plate at the end position of the side end of the arc segment. Both the arc-starting plate and the lead-out plate extend outward in the extension direction of the arc segment. The side ends of the arc segment, the arc-starting plate, and the lead-out plate are uniformly beveled. The bevel angle is 10°-15°. The bevel extends from the arc-starting plate through the arc segment toward the lead-out plate. Finally, remove the slag and oxide scale at the edge of the gas-cutting bevel.

[0010] S2. A positioning and adjustment support device. The adjusting support device includes a roller frame and a support positioning cylinder placed on the roller frame. The support positioning cylinder has an opening above it. Support blocks are vertically fixed to both side ends of the support positioning cylinder. The upper and lower ends of the support blocks are protruding from the end faces of the support positioning cylinder. An inner support circular frame is provided in the support positioning cylinder. The center of the inner support circular frame is placed on the central axis of the support positioning cylinder. A vertically arranged first driving cylinder is fixedly connected to the center position of the inner support circular frame. The driving end of the first driving cylinder extends vertically toward the direction of the opening, and the driving end of the first driving cylinder has a first electromagnet. The inner support circular frame also has two arc segment inner pushing structures. The two arc segment inner pushing structures are axially symmetrical with respect to the center of the inner support circular frame. The pushing end of the arc segment inner pushing structure is arranged near the end of the arc segment. The upper end of the support block has a rotatable arc segment outer tightening structure. The arc segment outer tightening structure is arranged near the end of the arc segment.

[0011] S3. Adjust the opening of the support positioning cylinder to the upper position, and use a level to calibrate the positions of the two support blocks on the support positioning cylinder so that the upper and lower ends of the two support blocks are arranged horizontally in sequence;

[0012] S4. Mark the center lines on the inner sides of the openings of the two arc segments. The extension direction of the center lines is consistent with the extension direction of the arc segments. The two arc segments are hoisted to the top of the adjustment support device by a crane respectively. There are at least two adjustment support devices directly below each arc segment. The side ends of the arc segments protrude 8cm-12cm from the corresponding support positioning cylinder. The arc segment is gradually lowered under the action of the crane. The opening of the arc segment is set downward. At the same time, the first driving cylinder of the adjustment support device is lifted vertically upward until the driving end of the first driving cylinder contacts the center line position of the arc segment. The first electromagnet is energized to fix the driving end of the first driving cylinder to the arc segment. At this time, the two arc segment inner pushing structures push toward the two side ends of the arc segment at the same time. The pushing strokes of the two arc segment inner pushing structures are consistent until the pushing ends of the arc segment inner pushing structures contact and are fixed to the side ends of the arc segment. Finally, the crane is separated from the arc segment, and the first driving cylinder and the two arc segment inner pushing structures are synchronously contracted until the arc segment is positioned between the support blocks of the adjustment support device.

[0013] S5. The clamping end of the arc segment outer tightening structure rotates to the outer end position of the arc segment and applies a clamping force to the outer end position of the arc segment;

[0014] S6. Gradually move one arc segment closer to the other arc segment by moving and adjusting the support device until the groove gap between the two arc segments is 6 mm to 8 mm, and the grooves of the two arc segments form a V-shaped weld bead. Steel pads are fixed to the lower ends of the two arc segments by spot welding. The steel pads are placed directly below the V-shaped weld bead, and the lower side of the V-shaped weld bead is sealed. One end of the steel pad is placed under the arc starting plate and fixed to the arc starting plate, and the other end of the steel pad is placed under the lead-out plate and fixed to the lead-out plate.

[0015] S7, the roller frames on the multiple adjustment support devices rotate synchronously in opposite directions, so that a support block on the adjustment support device is vertically set directly above the support positioning cylinder, so that the end of the arc segment close to the support block is in a horizontal state, and the arc starting plate is placed above the lead-out plate. After the adjustment support device is positioned, it stops rotating;

[0016] S8. Use φ4.0 welding wire for the welding gun, welding current 650A, voltage 32V, welding speed 500mm / min, and the rollers on the multiple adjustment support devices rotate synchronously in the positive direction to form the weld. The weld extends from the arc starting plate through the V-shaped weld bead toward the lead-out plate.

[0017] S9. Cut and remove the arc starting plate and the lead-out plate from the side ends of the arc segment.

[0018] A further improvement of the present invention is that the inner supporting circular frame is an X-shaped structure fixedly arranged in the supporting positioning cylinder, and the side ends of the inner supporting circular frame are fixedly connected to the inner wall of the supporting positioning cylinder by welding.

[0019] A further improvement of the present invention is that the arc segment inward pushing structure includes a reinforcing rib arranged between the supporting circular frame and the first driving cylinder, a second driving cylinder is provided between the reinforcing rib and the side end of the arc segment, the second driving cylinder is vertically arranged on the reinforcing rib, and a second electromagnet is connected to the driving end of the second driving cylinder.

[0020] A further improvement of the present invention is that a triangular structure is formed between the reinforcing ribs, the supporting circular frame and the first driving cylinder.

[0021] A further improvement of the present invention is that the external tightening structure of the arc segment includes a rotary clamping cylinder rotatably arranged at the upper end of the support block, the top of the rotary clamping cylinder is provided with a connecting block, one end of the connecting block is provided with a third driving cylinder for externally clamping the arc segment, the third driving cylinder is provided through the connecting block, and the driving end of the third driving cylinder is provided with a clamping block.

[0022] A further improvement of the present invention is that the lower end surface of the clamping block matches the end surface in contact with the arc segment, and the lower end of the clamping block has a rubber buffer layer.

[0023] A further improvement of the present invention is that a pressure sensor is embedded in the lower end of the clamping block, and the clamping block clamps the side end face of the arc segment under the driving action of the third driving cylinder. When the pressure value of the clamping block on the arc segment detected by the pressure sensor is greater than the set value predetermined by the system, the third driving cylinder stops the lifting drive.

[0024] A further improvement of the present invention is that in step S8, the welding end of the welding gun is vertically facing the position of the arc starting plate to start welding.

[0025] A further improvement of the present invention is that the groove gap between the two arc segments is 7 mm, and the angle of the V-shaped weld formed by the two arc segments is 20°.

[0026] A further improvement of the present invention is that the roller frame includes two rollers for supporting and rotating the support positioning cylinder, and the distance b between the two rollers is greater than the distance a between the two support blocks.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The present invention positions the arc segment on a dedicated adjustment support device, and aligns the first drive cylinder with the center line of the arc segment to achieve preliminary horizontal positioning of the arc segment, thereby ensuring the positional accuracy when two adjacent arc segments are docked. After the two arc segments are hoisted, there is no need to adjust the distance and angle between them. At the same time, the first drive cylinder and the arc segment inward pushing structure are synchronously contracted to limit the arc segment between the support blocks, while the arc segment external tightening structure clamps and fixes the side ends of the arc segment, eliminating the traditional method of fixing the arc segment by welding, thereby ensuring the structural strength and assembly accuracy of the arc segment. In particular, the cooperation of the arc segment inward pushing structure and the arc segment external tightening structure at both ends of the arc segment avoids welding defects and welding deformation at both ends of the arc segment.

[0029] 2. During welding, the welding gun moves from the position of the arc strike plate to the position of the lead-out plate. The metal solution of the welding gun stays at the starting position (arc strike plate) and the end position (lead-out plate) of the V-shaped weld bead, so that the welding defects are concentrated on the arc strike plate and the lead-out plate. Finally, the arc strike plate and the lead-out plate are cut to ensure the welding quality between the two adjacent arc segments.

[0030] 3. The support positioning cylinder is a cylindrical structure with an opening, which is convenient for positioning the arc segment and for the arc segment to rotate with the rotation of the roller frame. At the same time, the support positioning cylinder is provided with an X-shaped internal support circular frame. The internal support circular frame plays a good supporting and reinforcing role for the support positioning cylinder, ensuring the circularity of the support positioning cylinder, thereby ensuring the rotation smoothness of the support positioning cylinder and the arc segment, and ensuring that the welding end of the welding gun maintains the same distance from the arc segment; secondly, the setting of the reinforcement ribs ensures the connection strength between the first drive cylinder and the internal support circular frame, and ensures the driving verticality of the first drive cylinder. Description of the drawings:

[0032] Figure 1 It is a structural schematic diagram of the adjustable support device of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure after the arc segment is positioned in step S5 of the present invention.

[0034] Figure 3 It is a structural schematic diagram of the two arc segments approaching each other in step S6 of the present invention.

[0035] Figure 4 for Figure 3 A top view of

[0036] Figure 5 for Figure 4 AA sectional view;

[0037] Numbers in the figure:

[0038] 1-arc segment, 2-arc start plate, 3-lead-out plate, 4-groove, 5-adjustable support device, 6-V-shaped weld bead, 7-steel backing, 8-welding gun;

[0039] 51-roller frame, 52-support positioning cylinder, 53-support block, 54-opening, 55-circular support frame, 56-first driving cylinder, 57-first electromagnet, 58-arc segment inward pushing structure, 59-arc segment external tightening structure, 510-roller; 581-reinforcement rib, 582-second driving cylinder, 583-second electromagnet; 591-rotating clamping cylinder, 592-connecting block, 593-third driving cylinder, 594-clamping block, 595-rubber buffer pad, 596-pressure sensor. Specific implementation method:

[0041] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0042] This embodiment provides an axial splicing process for arc segments of a teardrop-shaped wind tower, and the specific steps include:

[0043] S1. Weld the arc-starting plate 2 at the starting position of the side end of the arc segment 1, and weld the lead-out plate 3 at the end position of the side end of the arc segment 1. The arc-starting plate 2 and the lead-out plate 3 both extend outward in the extension direction of the arc segment 1. The side ends of the arc segment 1, the arc-starting plate 2, and the lead-out plate 3 are uniformly beveled. The angle of the bevel 4 is 10°-15°. The bevel 4 extends from the arc-starting plate 2 through the arc segment 1 toward the lead-out plate 3. Finally, remove the slag and oxide scale at the edge of the gas-cutting bevel.

[0044] S2, positioning and adjusting the support device 5, such as Figure 1As shown, the adjustment support device 5 includes a roller frame 51 and a support positioning cylinder 52 placed on the roller frame 51. The support positioning cylinder 52 has an opening 54 above it. Support blocks 53 are vertically fixed to both sides of the support positioning cylinder 52. The upper and lower ends of the support blocks 53 are both protruding from the end surface of the support positioning cylinder 52. The support positioning cylinder 52 has an inner support circular frame 55. The center of the inner support circular frame 55 is placed on the central axis of the support positioning cylinder 52. The center position of the inner support circular frame 55 is fixedly connected to the vertically arranged first drive cylinder 5 6. The driving end of the first driving cylinder 56 extends vertically toward the opening 54 and is provided with a first electromagnet 57. The inner support frame 55 is further provided with two arc segment inner pushing structures 58. The two arc segment inner pushing structures 58 are arranged axially symmetrically about the center of the inner support frame 55. The pushing ends of the arc segment inner pushing structures 58 are provided near the end of the arc segment 1. The upper end of the support block 53 is provided with a rotatable arc segment outer tightening structure 59. The arc segment outer tightening structure 59 is provided near the end of the arc segment 1.

[0045] S3. Adjust the opening 54 of the support positioning cylinder 52 to the upper position, and use a level to calibrate the positions of the two support blocks 53 on the support positioning cylinder 52 so that the upper and lower ends of the two support blocks 53 are aligned horizontally.

[0046] S4. Mark the center lines inside the openings 54 of the two arc segments 1. The extension direction of the center lines is consistent with the extension direction of the arc segments. The two arc segments 1 are hoisted to the top of the adjustment support device 5 by a crane. There are at least two adjustment support devices 5 directly below each arc segment 1. The side ends of the arc segments 1 protrude 8cm-12cm from the corresponding support positioning cylinders. The arc segment 1 is gradually lowered under the action of the crane. The opening 54 of the arc segment 1 is set downward. At the same time, the first drive cylinder 56 of the adjustment support device 5 is vertically lifted upward until the first drive cylinder 56 is lifted upward. The driving end of the cylinder 56 contacts the centerline of the arc segment 1, and the first electromagnet 57 is energized to fix the driving end of the first driving cylinder 56 to the arc segment 1. At this time, the two arc segment inner pushing structures 58 simultaneously push toward the two side ends of the arc segment 1, and the pushing strokes of the two arc segment inner pushing structures 58 are consistent until the pushing ends of the arc segment inner pushing structures 58 contact and fix with the side ends of the arc segment 1. Finally, the crane is separated from the arc segment 1, and the first driving cylinder 56 and the two arc segment inner pushing structures 58 are synchronously contracted until the arc segment 1 is positioned between the support blocks 53 of the adjustment support device 5.

[0047] S5, such as Figure 2 As shown, the pressing end of the arc segment outer tightening structure 59 rotates to the outer end position of the arc segment 1 and applies a clamping force to the outer end position of the arc segment 1;

[0048] S6, by moving and adjusting the support device 5, one arc segment 1 is gradually brought closer to another arc segment 1, as shown in FIG. Figure 3 、 Figure 4 、 Figure 5 As shown, until the groove gap between the two arc segments 1 is 6mm-8mm, the grooves 4 of the two arc segments 1 form a V-shaped weld bead 6, and a steel liner 7 is fixed to the lower ends of the two arc segments 1 by spot welding. The steel liner 7 is placed directly below the V-shaped weld bead 6 and the lower side of the V-shaped weld bead 6 is sealed. One end of the steel liner 7 is placed on the lower end of the arc starting plate 2 and fixed to the arc starting plate 2, and the other end of the steel liner 7 is placed on the lower end of the lead-out plate 3 and fixed to the lead-out plate 3;

[0049] S7, the roller frames 51 on the multiple adjustment support devices 5 rotate synchronously in the opposite direction, so that a support block 53 on the adjustment support device 5 is vertically set directly above the support positioning cylinder 52, so that the end of the arc segment 1 close to the support block 53 is in a horizontal state. At this time, the arc starting plate 2 is placed above the lead-out plate 3. After the adjustment support device 5 is positioned, it stops rotating;

[0050] S8, welding gun 8 uses φ4.0 welding wire, welding current 650A, voltage 32V, welding speed 500mm / min, and multiple roller frames 51 on the adjustment support device 5 rotate synchronously in the positive direction to form the weld. The weld extends from the arc starting plate 2 through the V-shaped weld bead 6 toward the lead-out plate 3;

[0051] S9, cutting and removing the arc starting plate 2 and the lead-out plate 3 from the side ends of the arc segment 1.

[0052] The present invention positions the arc segment 1 on a dedicated adjustment support device 5, and aligns the first drive cylinder 56 with the center line of the arc segment 1 to initially position the arc segment 1 horizontally, thereby ensuring the position accuracy when two adjacent arc segments 1 are docked. After the two arc segments 1 are hoisted, there is no need to additionally adjust the distance and angle between the two arc segments 1. At the same time, the first drive cylinder 56 and the arc segment inward pushing structure 58 are synchronously contracted to limit the arc segment 1 between the support blocks 53, and the arc segment external tightening structure 59 clamps and fixes the side ends of the arc segment 1, eliminating the traditional fixing method of the arc segment 1 by welding, thereby ensuring the structural strength and assembly accuracy of the arc segment 1, especially the cooperation of the two side ends of the arc segment 1 through the arc segment inward pushing structure 58 and the arc segment external tightening structure 59, thereby avoiding welding defects and welding deformation at both ends of the arc segment 1.

[0053] During welding, the welding gun 8 moves from the position of the arc strike plate 2 to the position of the lead-out plate 3, and the metal solution of the welding gun 8 stays at the starting position (arc strike plate) and the end position (lead-out plate) of the V-shaped weld bead 6, so that the welding defects are concentrated on the arc strike plate 2 and the lead-out plate 3. Finally, by cutting the arc strike plate 2 and the lead-out plate 3, the welding quality between the two adjacent arc segments 1 is ensured.

[0054] Furthermore, the inner support frame 55 is an X-shaped structure fixedly disposed in the support positioning tube 52 , and the side ends of the inner support frame 55 are fixedly connected to the inner wall of the support positioning tube 52 by welding.

[0055] Furthermore, the arc segment inward pushing structure 58 includes a reinforcing rib 581 arranged between the supporting circular frame 55 and the first driving cylinder 56, and a second driving cylinder 582 is provided between the reinforcing rib 581 and the side end of the arc segment 1. The second driving cylinder 582 is vertically arranged on the reinforcing rib 581, and a second electromagnet 583 is connected to the driving end of the second driving cylinder 582.

[0056] Furthermore, a triangular structure is formed between the reinforcing rib 581 , the supporting frame 55 and the first driving cylinder 56 .

[0057] The support positioning cylinder 52 is a cylindrical structure with an opening, which is convenient for positioning the arc segment 1 and for rotating the arc segment 1 as the roller frame 51 rotates. At the same time, the support positioning cylinder 52 has an X-shaped internal support circular frame 55. The internal support circular frame 55 plays a good supporting and reinforcing role on the support positioning cylinder 52, ensuring the circularity of the support positioning cylinder 52, thereby ensuring the rotation smoothness of the support positioning cylinder 52 and the arc segment 1, and ensuring that the welding end of the welding gun 8 maintains the same distance from the arc segment 1; secondly, the setting of the reinforcement rib 581 ensures the connection strength between the first drive cylinder 582 and the internal support circular frame 55, and ensures the driving verticality of the first drive cylinder 582.

[0058] Furthermore, the arc segment external tightening structure 59 includes a rotary clamping cylinder 591 rotatably arranged at the upper end of the support block 53, the top of the rotary clamping cylinder 591 is provided with a connecting block 592, and one end of the connecting block 592 is provided with a third driving cylinder 593 for externally clamping the arc segment 1, the third driving cylinder 593 is arranged through the connecting block 592, and the driving end of the third driving cylinder 593 is provided with a clamping block 594.

[0059] Furthermore, the lower end surface of the clamping block 594 matches the end surface in contact with the arc segment 1, and the lower end of the clamping block 594 has a rubber buffer layer 595.

[0060] Furthermore, a pressure sensor 596 is embedded in the lower end of the clamping block 594. The clamping block 594 clamps the side end face of the arc segment 1 under the driving action of the third driving cylinder 593. When the pressure value of the clamping block 594 on the arc segment 1 detected by the pressure sensor 596 is greater than the set value predetermined by the system, the third driving cylinder 593 stops the lifting drive.

[0061] Furthermore, in step S8 , the welding end of the welding gun 8 is vertically positioned toward the arc striking plate 2 to start welding.

[0062] Furthermore, the gap between the grooves 4 of the two arc segments 1 is 7 mm, and the angle of the V-shaped weld bead 6 formed by the two arc segments 1 is 20°.

[0063] Furthermore, the roller frame 51 includes two rollers 510 that support and rotate the support positioning cylinder 52 , and the distance b between the two rollers 510 is greater than the distance a between the two support blocks 53 .

[0064] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for axially splicing arc segments of a teardrop-shaped wind tower, characterized in that: The specific steps include: S1. Welding an arc-starting plate (2) at the starting position of the side end of the arc segment (1), and welding a lead-out plate (3) at the end position of the side end of the arc segment (1), wherein the arc-starting plate (2) and the lead-out plate (3) are both extended outward in the extension direction of the arc segment (1), and the side ends of the arc segment (1), the arc-starting plate (2) and the lead-out plate (3) are uniformly beveled, and the angle of the bevel (4) is 10°-15°. The bevel (4) extends from the arc-starting plate (2) through the arc segment (1) toward the lead-out plate (3), and finally removing the slag and oxide scale at the edge of the gas-cutting bevel; S2, a positioning and adjusting support device (5), the adjusting support device (5) comprises a roller frame (51) and a support positioning cylinder (52) placed on the roller frame (51), an opening (54) is provided on the upper side of the support positioning cylinder (52), support blocks (53) are vertically fixed to both side ends of the support positioning cylinder (52), the upper and lower ends of the support blocks (53) are both protruding from the end surface of the support positioning cylinder (52), an inner support circular frame (55) is provided in the support positioning cylinder (52), the center of the inner support circular frame (55) is placed on the central axis of the support positioning cylinder (52), and the center position of the inner support circular frame (55) is fixedly connected to a vertically arranged a first driving cylinder (56), wherein the driving end of the first driving cylinder (56) extends vertically toward the opening (54), and the driving end of the first driving cylinder (56) has a first electromagnet (57); the inner support frame (55) also has two arc segment inner pushing structures (58), the two arc segment inner pushing structures (58) are arranged axially symmetrically with respect to the center of the inner support frame (55), the pushing end of the arc segment inner pushing structure (58) is arranged near the end of the arc segment (1), and the upper end of the support block (53) has a rotatable arc segment outer tightening structure (59), and the arc segment outer tightening structure (59) is arranged near the end of the arc segment (1); S3, adjusting the opening (54) of the support positioning cylinder (52) to the upper side position, and correcting the positions of the two support blocks (53) on the support positioning cylinder (52) by using a level meter, so that the upper and lower ends of the two support blocks (53) are arranged horizontally and correspondingly in sequence; S4. Mark the center lines inside the openings (54) of the two arc segments (1). The extension direction of the center lines is consistent with the extension direction of the arc segments. The two arc segments (1) are hoisted to the top of the adjustment support device (5) by a crane. There are at least two adjustment support devices (5) directly below each arc segment (1). The side ends of the arc segments (1) protrude 8cm-12cm from the corresponding support positioning cylinder (52). The arc segment (1) is gradually lowered under the action of the crane. The opening (54) of the arc segment (1) is set downward. At the same time, the first driving cylinder (56) of the adjustment support device (5) is vertically lifted upward until the first driving cylinder ( 56) is in contact with the center line position of the arc segment (1), the first electromagnet (57) is energized to fix the driving end of the first driving cylinder (56) with the arc segment (1), and at this time, the two arc segment inner pushing structures (58) push toward the two side ends of the arc segment (1) at the same time, and the pushing strokes of the two arc segment inner pushing structures (58) are consistent until the pushing end of the arc segment inner pushing structure (58) is in contact with the side end of the arc segment (1) and fixed, and finally the crane is separated from the arc segment (1), and the first driving cylinder (56) and the two arc segment inner pushing structures (58) are synchronously contracted until the arc segment (1) is positioned between the support blocks (53) of the adjusting support device (5); S5, the clamping end of the arc segment outer tightening structure (59) rotates to the outer end position of the arc segment (1), and applies a clamping force to the outer end position of the arc segment (1); S6. By moving and adjusting the support device (5), one arc segment (1) is gradually brought closer to the other arc segment (1) until the groove gap between the two arc segments (1) is 6mm-8mm, the grooves (4) of the two arc segments (1) form a V-shaped weld bead (6), and a steel liner (7) is fixed to the lower side ends of the two arc segments (1) by spot welding, the steel liner (7) is placed directly below the V-shaped weld bead (6), and the lower side of the V-shaped weld bead (6) is closed, one end of the steel liner (7) is placed at the lower end of the arc starting plate (2) and fixed to the arc starting plate (2), and the other end of the steel liner (7) is placed at the lower end of the lead-out plate (3) and fixed to the lead-out plate (3); S7, the roller frames (51) on the multiple adjustment support devices (5) rotate synchronously in the opposite direction, so that a support block (53) on the adjustment support device (5) is vertically arranged at a position directly above the support positioning cylinder (52), so that one end of the arc segment (1) close to the support block (53) is in a horizontal state, and at this time, the arc starting plate (2) is placed above the lead-out plate (3), and the adjustment support device (5) stops rotating after positioning is completed; S8, the welding gun (8) uses φ4.0 welding wire, the welding current is 650A, the voltage is 32V, and the welding speed is 500mm / min. The roller frames (51) on the multiple adjustment support devices (5) rotate synchronously in the positive direction to form a weld seam, which extends from the arc starting plate (2) through the V-shaped weld bead (6) toward the lead-out plate (3); S9, cutting and removing the arc starting plate (2) and the lead-out plate (3) from the side ends of the arc segment (1).

2. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 1 is characterized in that: The inner support frame (55) is an X-shaped structure fixedly arranged in the support positioning cylinder (52), and the side end of the inner support frame (55) is fixedly connected to the inner wall of the support positioning cylinder (52) by welding.

3. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 2 is characterized in that: The arc segment inward pushing structure (58) includes a reinforcing rib (581) arranged between the supporting frame (55) and the first driving cylinder (56), and a second driving cylinder (582) is provided between the reinforcing rib (581) and the side end of the arc segment (1). The second driving cylinder (582) is vertically arranged on the reinforcing rib (581), and a second electromagnet (583) is connected to the driving end of the second driving cylinder (582).

4. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 3 is characterized in that: A triangular structure is formed between the reinforcing rib (581), the supporting circular frame (55), and the first driving cylinder (56).

5. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 4 is characterized in that: The arc segment external tightening structure (59) includes a rotary clamping cylinder (591) rotatably arranged on the upper end of the support block (53), the top end of the rotary clamping cylinder (591) is provided with a connecting block (592), one end of the connecting block (592) is provided with a third driving cylinder (593) for externally clamping the arc segment (1), the third driving cylinder (593) is provided through the connecting block (592), and the driving end of the third driving cylinder (593) is provided with a clamping block (594).

6. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 5 is characterized in that: The lower end surface of the clamping block (594) cooperates with the end surface in contact with the arc segment (1), and the lower end of the clamping block (594) has a rubber buffer layer (595).

7. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 6 is characterized in that: A pressure sensor (596) is embedded in the lower end of the clamping block (594). The clamping block (594) clamps the side end surface of the arc segment (1) under the driving action of the third driving cylinder (593). When the pressure value of the clamping block (594) on the arc segment (1) detected by the pressure sensor (596) is greater than a set value predetermined by the system, the third driving cylinder (593) stops the lifting drive.

8. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 1 is characterized in that: In step S8, the welding end of the welding gun (8) is vertically directed toward the arc striking plate (2) to start welding.

9. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 1 is characterized in that: The gap between the grooves (4) of the two arc segments (1) is 7 mm, and the angle of the V-shaped weld bead (6) formed by the two arc segments (1) is 20°.

10. The axial splicing process of the arc segment of a teardrop-shaped wind tower according to claim 1, characterized in that: The roller frame (51) comprises two rollers (510) that support and rotationally drive the support positioning cylinder (52), and a distance b between the two rollers (510) is greater than a distance a between the two support blocks (53).

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