Wind tower stand column flange welding tool

Abstract

The invention relates to the technical field of large flange welding tools, and provides a wind tower stand column flange welding tool which comprises a base, a stand column supporting base, a flange mounting base, a rotating base, a locking assembly and a positioning assembly, the stand column supporting base and the flange mounting base are arranged on the base, the rotating base is connected to the flange mounting base in a pivoted mode, and the locking assembly and the positioning assembly are arranged on the rotating base. The positioning assembly comprises a center shaft arranged in the axial direction of the rotating base, a flange positioning part arranged on one side of the center shaft and a stand column positioning part arranged on the other side of the center shaft, and the center of the flange positioning part and the center of the stand column positioning part are coaxial with the center shaft. The base is further provided with a driving assembly used for driving the rotating base to rotate, the driving assembly comprises two rotating wheel assemblies arranged below the rotating base, and the rotating base is arranged between the two rotating wheel assemblies. Submerged-arc welding can be carried out through one-time positioning, the dislocation phenomenon between the flange and the stand column caused by repeated rotation of a component in the prior art is avoided, the welding quality and strength requirements of the wind tower stand column flange are guaranteed, and the efficiency of the welding procedure is further improved.

Description

Technical Field

[0001] This invention relates to the field of large flange welding fixtures, and particularly to a welding fixture for wind tower column flanges. Background Technology

[0002] Flanges in the wind power industry are large components, with diameters reaching several meters. When welding flanges for prestressed tower columns, it is necessary to ensure a high-precision fit between the flange and the column before welding. Wind tower flange welding fixtures are essential auxiliary tools that balance precision, efficiency, and safety, directly affecting the service life of the tower and the reliability of the wind tower frame.

[0003] Existing welding fixtures for column flanges are generally assembled manually. Lifting equipment is used to hoist the flange to its mounting position on the mounting plate, and bolts are used to secure the flange to the mounting plate. The flange is then butt-welded to the column. Due to site limitations, the welding process requires tack welding to fix the position of the flange and column first, and then rotating the flange and column components segment by segment to weld the inner and outer bevels where the flange meets the column. This results in significant waste of manual labor time and low production capacity.

[0004] Secondly, existing welding methods require multiple rotations of unfinished components, which can easily lead to bolt connection failure due to disassembly, resulting in reduced concentricity accuracy between the column and flange. If the welding heat input is uneven, it can easily cause the flange to tilt inward or outward, which can easily lead to welding defects and is not conducive to ensuring the welding strength of the wind tower. Summary of the Invention

[0005] In view of this, the present invention aims to provide a welding fixture for wind tower column flanges, which can position the flange and column, ensure the concentricity of the flange and column, ensure welding quality, and improve welding efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A welding fixture for a wind tower column flange includes a base, a column support seat and a flange mounting seat disposed on the base, a rotating seat pivotally connected to the flange mounting seat, and a locking assembly and a positioning assembly disposed on the rotating seat. The positioning assembly includes a central shaft arranged along the axis of the rotary seat, a flange positioning part disposed on one side of the central shaft, and a column positioning part disposed on the other side of the central shaft. The centers of the flange positioning part and the column positioning part are coaxial with the central shaft. The base is also provided with a drive assembly for driving the rotating seat to rotate. The drive assembly includes two rotating wheel assemblies located below the rotating seat, and the rotating seat is located between the two rotating wheel assemblies.

[0007] Furthermore, the rotating wheel assembly includes baffles on both sides of the rotating base, a driving wheel disposed between the two baffles, a driven wheel and a guide wheel abutting against the bottom of the rotating base, and a first driving part for driving the driving wheel to rotate, wherein the driving wheel and the driven wheel are connected by a chain drive.

[0008] Furthermore, the flange positioning part includes a first sliding sleeve sleeved on the central shaft, a plurality of first connecting rods evenly distributed around the circumference and pivotally connected to the first sliding sleeve, and a first sliding block pivotally connected to the first connecting rods; The rotating base is provided with opening slots evenly distributed along its own radial circumference, and the first slide is disposed in the opening slots; one end of the central shaft is fixedly connected to a second driving part, and the power output end of the second driving part is provided with a first hollow shaft, which is connected to the first sliding sleeve. The second drive unit drives several of the first slides to move closer to or away from the flange from the outside.

[0009] Furthermore, the column positioning part includes a second sliding sleeve sleeved on the other side of the central shaft, a plurality of second connecting rods evenly distributed around the circumference and pivotally connected to the second sliding sleeve, and a second sliding seat pivotally connected to the second connecting rods; The second slide is disposed in the opening groove. The second slide is close to the central shaft. A third drive unit is fixedly connected to the central shaft. The power output end of the third drive unit is provided with a second hollow shaft. The second hollow shaft is connected to the second slide sleeve. The third driving unit drives several second slides to move closer to or away from the inner wall of the column from the inside.

[0010] Furthermore, the locking assembly includes a fixing plate fixed on the rotary seat, at least two locking bolts connected to the fixing plate, a locking block sleeved on the locking bolts, and a fourth driving part for driving the locking block closer to the flange. The lower ends of the plurality of locking bolts are connected to the pressure plate, and the fourth drive unit drives the pressure plate to move toward one end closer to the flange.

[0011] Furthermore, two locking bolts are spaced apart on the fixing plate, which is arranged radially along the rotating seat. One of the locking bolts is fitted with a pad, which abuts against the rotating seat and the pressure plate.

[0012] Furthermore, the power output end of the fourth drive unit is also connected to a connecting block, and the connecting block is provided with a fifth drive unit. The fifth drive unit drives the locking bolt to rotate, and the locking bolt is provided in a one-to-one correspondence with the fifth drive unit. The power end of the fourth drive unit is connected to an extension shaft, which passes through the connecting block and has a baffle plate at its end. An elastic element is sleeved on the outside of the extension shaft. The rotating base and the flange are provided with threaded holes corresponding to the locking bolts. When the locking bolts are screwed into the rotating base and the flange, the connecting block moves toward the baffle and squeezes the elastic element.

[0013] Furthermore, the rotary base is connected to a guide rail that protrudes outward along its radial direction, the guide rail has a guide groove formed inside, the guide rail is correspondingly arranged with the fixing plate, and the width of the guide groove is adapted to the width of the fixing plate. A sixth drive unit is also connected to the guide rail, and the power output end of the sixth drive unit is connected to the fixed plate.

[0014] Compared with the prior art, the present invention has the following advantages: The wind turbine column flange welding fixture of this invention features a column support and a flange mounting base on the base. The column and flange are respectively hoisted into their corresponding positions for connection. The flange positioning part and the column positioning part of the positioning assembly simultaneously fix the column and flange onto the rotating base. Because the flange positioning part and the column positioning part are sleeved on both sides of the central shaft, the column and flange are coaxial after positioning, ensuring uniform spacing between them and guaranteeing welding quality. A locking assembly further secures the flange to the rotating base, limiting its axial displacement.

[0015] Meanwhile, by setting a drive component on the base, the turntable can be driven to rotate. During this process, the positioning component and the locking component always act on the column and flange, so that submerged arc welding can be performed with one positioning. This avoids the misalignment between the flange and the column caused by multiple rotations of components in the prior art. This not only ensures the quality and strength requirements of the wind tower column flange welding, but also improves the efficiency of the welding process. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view schematic diagram of the welding fixture for the wind tower column flange and the installation of the flange and column according to an embodiment of the present invention; Figure 2 This is a first-view perspective three-dimensional schematic diagram of the welding fixture for the wind tower column flange and the installation of the flange and column according to an embodiment of the present invention; Figure 3 This is a two-dimensional perspective view of the welding fixture for the wind tower column flange and the installation of the flange and column according to an embodiment of the present invention. Figure 4 This is a three-dimensional perspective view of the welding fixture for the wind tower column flange and the installation of the flange and column as described in an embodiment of the present invention. Figure 5 for Figure 4 A magnified view of a section at point I; Figure 6 This is a schematic diagram illustrating the installation of the locking assembly, flange, and rotating base according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Base; 2. Column support; 3. Flange mounting base; 4. Rotary seat; 5. Locking assembly; 6. Positioning assembly; 7. Drive assembly; 8. Column; 9. Flange; 10. Shaft stop; 401. Opening groove; 501. Fixing plate; 502. Locking bolt; 503. Locking block; 504. Fourth drive unit; 505. Pad; 506. Connecting block; 507. Fifth drive unit; 508. Extension shaft; 509. Baffle; 510. Elastic element; 511. Guide rail; 512. Sixth drive unit; 601. Central shaft; 602. Flange positioning part; 603. Column positioning part; 701. Baffle; 702. Drive wheel; 703. Driven wheel; 704. Guide wheel; 705. First drive unit; 6021, First sliding sleeve; 6022, First connecting rod; 6023, First slide block; 6024, Second drive unit; 6025, First hollow shaft. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] This embodiment relates to a welding fixture for a wind tower column flange. Overall, as shown... Figures 1 to 3 As shown, the wind turbine column flange welding fixture includes a base 1, a column support 2 and a flange mounting base 3 mounted on the base 1, a rotating base 4 pivotally connected to the flange mounting base, and a locking assembly 5 and a positioning assembly 6 mounted on the rotating base 4. The positioning assembly 6 includes a central shaft 601 axially arranged along the rotating base 4, a flange positioning part 602 located on one side of the central shaft 601, and a column positioning part 603 located on the other side of the central shaft 601. The centers of the flange positioning part 602 and the column positioning part 603 are coaxial with the central shaft 601. The base 1 also has a drive assembly 7 for driving the rotating base 4 to rotate. The drive assembly 7 includes two roller assemblies located below the rotating base 4, with the rotating base 4 positioned between the two roller assemblies.

[0023] According to the above design, the welding fixture for the wind tower column flange in this embodiment has a column support seat 2 and a flange mounting seat 3 simultaneously installed on the base 1. The column 8 and flange 9 are respectively hoisted into their corresponding positions for docking. The flange positioning part 602 and the column positioning part 603 of the positioning component 6 simultaneously fix the column and flange 9 onto the rotating seat 4. Because the flange positioning part 602 and the column positioning part 603 are sleeved on both sides of the central shaft 601, the column 8 and flange 9 can be made coaxial after positioning, thereby ensuring a uniform distance between the column and the flange 9 and guaranteeing the welding quality. The flange 9 is fixed on the rotating seat 4 by the locking component 5 to limit its axial displacement.

[0024] Meanwhile, the drive assembly 7 on the base 1 can drive the turntable to rotate. During this process, the positioning assembly 6 and the locking assembly 5 always act on the column 8 and the flange 9, so that submerged arc welding can be performed with one positioning. This avoids the misalignment between the flange 9 and the column 8 caused by multiple rotations of components in the prior art. This not only ensures the quality and strength requirements of the wind tower column flange welding, but also improves the efficiency of the welding process.

[0025] Based on the above overall introduction, this embodiment presents an exemplary structure of the wind tower column flange welding fixture, such as... Figures 1 to 3As shown, the base 1 in this embodiment adopts a flat plate structure, and the column support 2 consists of four legs and a support plate on the legs. The support plate has an inverted trapezoidal groove with an opening at the top, and the column is placed horizontally in the inverted trapezoidal groove for positioning. Of course, a movable support frame needs to be set at the other end of the column to ensure that the column is parallel to the ground and perpendicular to the flange 9.

[0026] Preferably, such as Figures 1 to 3 As shown, the rotary assembly includes baffles 701 on both sides of the rotary base 4, a driving wheel 702 between the two baffles 701, a driven wheel 703 and a guide wheel 704 abutting against the bottom of the rotary base 4, and a first drive unit 705 for driving the driving wheel 702 to rotate. The driving wheel 702 and the driven wheel 703 are connected by a chain drive. In this embodiment, the first drive unit 705 is a servo motor. The first drive unit 705 drives the driving wheel 702 to rotate, thereby driving the driven wheel 703 to rotate. The driven wheel 703 abuts against the rotary base 4, and the rotary base 4 rotates through friction. Two sets of rotary assemblies are arranged at the bottom of the rotary base 4 to ensure the stability of the rotary base 4 during rotation.

[0027] like Figures 1 to 3 As shown, the flange positioning part 602 includes a first sliding sleeve 6021 sleeved on the central shaft 601, a plurality of first connecting rods 6022 circumferentially pivotally connected to the first sliding sleeve 6021, and a first sliding seat 6023 pivotally connected to the first connecting rods 6022. The rotating seat 4 is provided with an opening groove 401 circumferentially distributed along its own radial direction, and the first sliding seat 6023 is disposed in the opening groove 401; a second driving part 6024 is fixedly connected to one end of the central shaft 601, and a first hollow shaft 6025 is provided at the power output end of the second driving part 6024. The first hollow shaft 6025 is connected to the first sliding sleeve 6021, and the second driving part 6024 drives the plurality of first sliding seats 6023 to move closer to or away from the flange 9 from the outside. In this embodiment, the second drive unit 6024 adopts a hydraulic cylinder. The first hollow shaft 6025 is sleeved on the outside of the central shaft 601 and connected to the first sliding sleeve 6021 through a connecting rib. Driven by the cylinder, the first sliding block 6023 moves axially along the central shaft 601. The first connecting rod 6022 rotates and drives the first sliding sleeve 6021 to slide in the opening groove 401, so that the first sliding sleeve 6021, which is circumferentially distributed on the outside of the flange 9, moves closer to the flange 9 to achieve positioning of the flange 9 and also restricts the radial displacement of the flange 9.

[0028] In addition, such as Figures 1 to 3As shown, the column positioning part 603 includes a second sliding sleeve sleeved on the other side of the central shaft 601, a plurality of second connecting rods evenly distributed around the circumference and pivotally connected to the second sliding sleeve, and a second sliding seat pivotally connected to the second connecting rods. The second sliding seat is disposed in the opening slot 401 and is close to the central shaft 601. A third driving part is fixedly connected to the central shaft 601. The power output end of the third driving part is provided with a second hollow shaft, which is connected to the second sliding sleeve. The third driving part drives the plurality of second sliding seats to move closer to or away from the inner wall of the column from the inside. In this embodiment, the third driving part is a hydraulic cylinder. The movement principle of the column positioning part 603 and the flange positioning part 602 is the same, and will not be described again here.

[0029] like Figures 4 to 6 As shown, the locking assembly 5 includes a fixing plate 501 fixed to the rotary base 4, at least two locking bolts 502 connected to the fixing plate 501, a locking block 503 sleeved on the locking bolts 502, and a fourth drive part 504 for driving the locking block 503 closer to the flange 9. The lower ends of the multiple locking bolts 502 are connected to the pressure plate, and the fourth drive part 504 drives the pressure plate to move towards one end closer to the flange 9. The fourth drive part 504 is a telescopic cylinder. By setting the fourth drive part 504 to drive the bottom of the locking bolts 502 closer to the flange 9 and the corresponding threaded holes on the rotary base 4, it is necessary to adjust the threaded holes on the flange 9 to correspond with the locking bolts 502 before locking the flange 9.

[0030] Furthermore, such as Figures 4 to 6 As shown, two locking bolts 502 are spaced apart on the fixing plate 501, which is radially arranged along the rotary seat 4. A spacer 505 is fitted onto one of the locking bolts 502, and the spacer 505 abuts against the rotary seat 4 and the pressure plate. The locking bolt 502 corresponding to the threaded hole on the rotary seat 4 is longer, while the locking bolt 502 corresponding to the threaded hole on the flange 9 is shorter. The thickness of the spacer 505 is equal to the thickness of the flange 9, and the spacer 505 can be replaced according to the different thicknesses of the flange 9.

[0031] As a preferred embodiment, such as Figures 4 to 6 As shown, the power output end of the fourth drive unit 504 is also connected to a connecting block 506. The connecting block 506 is provided with a fifth drive unit 507. The fifth drive unit 507 drives the locking bolt 502 to rotate. The locking bolt 502 and the fifth drive unit 507 are arranged in a one-to-one correspondence.

[0032] like Figures 5 to 6As shown, the power end of the fourth drive unit 504 is connected to an extension shaft 508, which passes through the connecting block 506 and has a baffle 509 connected to its end. An elastic element 510 is sleeved on the outside of the extension shaft 508. The rotary seat 4 and the flange 9 are provided with threaded holes corresponding to the locking bolt 502. When the locking bolt 502 is screwed into the rotary seat 4 and the flange 9, the connecting block 506 moves towards the baffle 509 and presses the elastic element 510. The fifth drive unit 507 uses a servo motor. The fourth drive unit 504 first drives the bottom of the locking bolt 502 to the flange 9 and the rotary seat 4. The fifth drive unit 507 drives the locking bolt 502 to rotate, and the locking bolt 502 is screwed into the rotary seat 4 until the pressure plate abuts against the flange 9 and the pad 505.

[0033] like Figure 5 As shown, the locking bolt 502 rotates relative to the locking block 503. Shaft stops 10 are fitted onto the locking bolt 502 on both the upper and lower sides of the locking block 503 to connect the locking block 503 to the locking bolt 502. As the locking bolt 502 rotates into the rotating seat 4, the connecting block 506 moves accordingly. In this embodiment, two fifth drive units 507 are provided to control the two locking bolts 502 respectively, and the two fifth drive units 507 rotate at the same speed.

[0034] Preferably, such as Figures 4 to 6 As shown, a guide rail 511 protruding radially outward is connected to the rotary base 4. A guide groove is formed within the guide rail 511, and the guide rail 511 is correspondingly positioned to the fixed plate 501. The width of the guide groove is adapted to the width of the fixed plate 501. A sixth drive unit 512 is also connected to the guide rail 511, and the power output end of the sixth drive unit 512 is connected to the fixed plate 501. In this embodiment, the sixth drive unit 512 is a telescopic cylinder. When it is necessary to replace the flange 9 and the gasket 505, the sixth drive unit 512 drives the fixed plate 501 to move radially into the guide groove and away from the flange 9.

[0035] 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 welding fixture for a wind turbine column flange, characterized in that: It includes a base (1), a column support (2) and a flange mounting seat (3) disposed on the base (1), a pivot seat (4) pivotally connected to the flange mounting seat (3), and a locking assembly (5) and a positioning assembly (6) disposed on the pivot seat (4). The positioning assembly (6) includes a central shaft (601) arranged along the axial direction of the rotary seat (4), a flange positioning part (602) provided on one side of the central shaft (601), and a column positioning part (603) provided on the other side of the central shaft (601). The centers of the flange positioning part (602) and the column positioning part (603) are coaxial with the central shaft (601). The base (1) is also provided with a drive assembly (7) for driving the rotating seat (4) to rotate. The drive assembly (7) includes two rotating wheel assemblies located below the rotating seat (4), and the rotating seat (4) is located between the two rotating wheel assemblies.

2. The welding fixture for the wind tower column flange according to claim 1, characterized in that: The rotating wheel assembly includes baffles (701) on both sides of the rotating base (4), a drive wheel (702) between the two baffles (701), a driven wheel (703) and a guide wheel (704) abutting below the rotating base (4), and a first drive unit (705) for driving the drive wheel (702) to rotate. The drive wheel (702) and the driven wheel (703) are connected by a chain drive.

3. The welding fixture for the wind tower column flange according to claim 2, characterized in that: The flange positioning part (602) includes a first sliding sleeve (6021) sleeved on the central shaft (601), a plurality of first connecting rods (6022) evenly distributed around the first sliding sleeve (6021) and a first sliding block (6023) pivotally connected to the first connecting rods (6022). The rotating base (4) is provided with opening slots (401) evenly distributed along its radial circumference, and the first slide (6023) is provided in the opening slots (401); one end of the central shaft (601) is fixedly connected to the second drive unit (6024), and the power output end of the second drive unit (6024) is provided with a first hollow shaft (6025), which is connected to the first slide (6021); The second drive unit (6024) drives a plurality of the first slides (6023) to move closer to or away from the flange (9) from the outside.

4. The welding fixture for the wind tower column flange according to claim 3, characterized in that: The column positioning part (603) includes a second sliding sleeve sleeved on the other side of the central shaft (601), a plurality of second connecting rods evenly distributed around the circumference and pivotally connected to the second sliding sleeve, and a second sliding seat pivotally connected to the second connecting rod; The second slide is located in the opening groove (401). The second slide is close to the central shaft (601). A third drive unit is fixedly connected to the central shaft (601). The power output end of the third drive unit is provided with a second hollow shaft. The second hollow shaft is connected to the second slide sleeve. The third driving unit drives several second slides to move closer to or away from the inner wall of the column from the inside.

5. The welding fixture for the wind tower column flange according to claim 4, characterized in that: The locking assembly (5) includes a fixing plate (501) fixed on the rotating base (4), at least two locking bolts (502) connected to the fixing plate (501), a locking block (503) sleeved on the locking bolts (502), and a fourth driving part (504) for driving the locking block (503) closer to the flange (9). The lower ends of the plurality of locking bolts (502) are connected to the pressure plate, and the fourth drive unit (504) drives the pressure plate to move toward one end closer to the flange (9).

6. The welding fixture for the wind tower column flange according to claim 5, characterized in that: Two locking bolts (502) are spaced apart on the fixing plate (501), which is arranged radially along the rotating seat (4). A pad (505) is fitted on one of the locking bolts (502), and the pad (505) abuts between the rotating seat (4) and the pressure plate.

7. The welding fixture for the wind tower column flange according to claim 6, characterized in that: The power output end of the fourth drive unit (504) is also connected to a connecting block (506), and a fifth drive unit (507) is provided on the connecting block (506). The fifth drive unit (507) drives the locking bolt (502) to rotate, and the locking bolt (502) and the fifth drive unit (507) are arranged in a one-to-one correspondence. The power end of the fourth drive unit (504) is connected to an extension shaft (508), the extension shaft (508) passes through the connecting block (506), and a baffle (509) is connected to its end. An elastic element (510) is sleeved on the outside of the extension shaft (508). The rotating base (4) and the flange (9) are provided with threaded holes corresponding to the locking bolt (502). When the locking bolt (502) is screwed into the rotating base (4) and the flange (9), the connecting block (506) moves toward the baffle (509) and squeezes the elastic element (510).

8. The welding fixture for the wind tower column flange according to claim 7, characterized in that: The rotating base (4) is connected to a guide rail (511) that protrudes outward along its radial direction. The guide rail (511) has a guide groove formed inside. The guide rail (511) is correspondingly arranged with the fixing plate (501). The width of the guide groove is adapted to the width of the fixing plate (501). The guide rail (511) is also connected to a sixth drive unit (512), and the power output end of the sixth drive unit (512) is connected to the fixed plate (501).

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