Welding and positioning tool for wind power jacket

Abstract

The utility model relates to the technical field of welding tools, in particular to a welding and positioning tool for a wind power jacket. Comprising a vertical frame, the upper end of which is provided with a base; an inclined C-shaped positioning seat is arranged at the upper end of the positioning bracket, the upwarp end of the positioning seat is opened, and the sinking end of the positioning seat is sealed; an arc-shaped lapping notch is formed in the upper end of the supporting bracket; the clamping mechanism is arranged at the sealing end of the positioning seat and is used for limiting the jacket pipe in the positioning seat; and the angle adjusting mechanism is arranged on the bottom wall of the positioning seat, is matched with the clamping mechanism and is used for adjusting the axial angle of the jacket pipe in the positioning seat. The inclined positioning seat is matched with the lapping notch in the supporting bracket, so that self-positioning is realized under the self weight, and the positioning and adjusting time is saved. And through the clamping mechanism, the jacket pipe is kept stable on the positioning seat, and welding dislocation caused by deviation in the welding process is avoided. And through the angle adjusting mechanism, the axial adjustment of the jacket pipe is more convenient.

Description

Technical Field

[0001] This patent relates to the field of welding tooling technology, and in particular to a welding positioning tooling for wind power jackets. Background Technology

[0002] An offshore wind turbine typically consists of a wind turbine generator, nacelle, tower, jacket, and deep foundation piles embedded in the seabed. The main body of the offshore wind turbine jacket is a truss structure, usually welded from several steel pipes, with numerous weld joints. Therefore, the welding quality directly affects the overall strength and service life of the jacket.

[0003] Currently, the welding of wind turbine jackets mainly relies on manual operation and simple clamps for fixation. Traditional welding positioning mostly involves manual adjustment of the clamps, which is not only time-consuming and labor-intensive, but also prone to axial displacement after clamping, as the pipe is a tubular component, resulting in misalignment or gaps in the welded joints.

[0004] To address this, this patent provides a welding and positioning fixture for wind power ductwork, which clamps and positions the pipes to improve the stability of the pipe clamping and the ease of adjusting the circumferential angle. Utility Model Content

[0005] The purpose of this patent is to solve the problems existing in the prior art by proposing a welding and positioning fixture for wind power jackets.

[0006] To achieve the above objectives, this patent adopts the following technical solution:

[0007] A welding and positioning fixture for wind turbine jacket supports, comprising:

[0008] A support frame, the upper end of which is provided with a base;

[0009] A positioning bracket is mounted on a base. The upper end of the positioning bracket is provided with an inclined C-shaped positioning seat, with the upper end of the positioning seat open and the lower end sealed.

[0010] A support bracket is provided on the base at intervals from the positioning bracket, and the upper end of the support bracket is provided with an arc-shaped stacking slot;

[0011] The clamping mechanism is located at the sealing end of the positioning seat and is used to limit the position of the guide frame pipe within the positioning seat;

[0012] An angle adjustment mechanism is installed on the bottom wall of the positioning seat and works in conjunction with the clamping mechanism to adjust the axial angle of the guide frame pipe within the positioning seat.

[0013] Preferably, the clamping mechanism includes a support disposed on the upper end face of the sealing end of the positioning seat, a right-angled mounting rod rotatably mounted on the support, a mounting cylinder at the end of the mounting rod, an opening at the lower end of the mounting cylinder and a clamping frame slidably mounted inside the opening, a spring between the clamping frame and the mounting cylinder, and multiple sets of clamping wheels symmetrically rotatably mounted on the clamping frame; the mounting rod is provided with an insertion hole, the support is provided with a threaded hole that mates with the insertion hole, a positioning screw is screwed into the threaded hole, and the positioning screw mates with the insertion hole.

[0014] Preferably, the mounting bracket is arc-shaped.

[0015] Preferably, the angle adjustment mechanism includes multiple rotating shafts rotatably mounted on the positioning seat. Each rotating shaft is provided with drive wheels spaced apart along the axial direction. The drive wheels on the multiple rotating shafts are circumferentially distributed with multiple clamping wheels. Each rotating shaft is provided with a driven gear at the end opposite to the opening of the positioning seat. The multiple driven gears mesh with a driving gear rotatably mounted on the positioning seat. The driving gear is driven by the drive structure and can rotate and achieve self-locking.

[0016] Preferably, the drive structure includes a worm gear coaxially arranged with the drive gear, the worm gear being located on the side of the drive gear away from the opening of the positioning seat, the worm gear meshing with a worm rotatably mounted on the sealing end of the positioning seat, and the shaft end of the worm being provided with a ratchet wrench.

[0017] Preferably, the drive structure further includes a drive shaft, which is a variable diameter shaft with a diameter that tapers from the middle to both ends. A rotating seat is fastened to the sealed end of the positioning seat. The small diameter of the drive shaft facing the opening of the positioning seat is rotatably installed inside the rotating seat. The drive gear is connected by a key and installed between the variable diameter end face of the drive shaft and the rotating seat. The worm gear is connected by a key and installed at the other small diameter end of the drive shaft. A stud is provided on the side of the drive shaft away from the opening end of the positioning seat, and a cap is screwed onto the stud to abut against the worm gear.

[0018] Preferably, a collar is fitted on the stud on the side of the cover away from the worm gear, and a mesh cover for the worm gear is provided on the collar. A self-locking nut is also threaded onto the stud and abuts against the collar.

[0019] Preferably, two sets of guide rails are symmetrically fastened to the base, and two support plates are symmetrically slidably installed on the two guide rails. The positioning bracket and the support bracket are respectively fastened to the two support plates. A double-ended lead screw is rotatably installed on the base between the two guide rails, and the two threads on the double-ended lead screw are respectively threaded to the two support plates.

[0020] The support bracket is an electric telescopic rod, and the mounting slot is located at the extended end of the electric telescopic rod.

[0021] Compared with the prior art, this patent provides a welding positioning fixture for wind power jackets, which has the following advantages:

[0022] 1. This patent utilizes the inclined positioning seat and the overlapping slot on the support bracket to enable the guide pipe to achieve self-positioning under its own weight, saving positioning and adjustment time.

[0023] 2. This patent is equipped with a clamping mechanism, which keeps the guide tube stable on the positioning seat and avoids displacement and welding misalignment during the welding process.

[0024] 3. This patent is equipped with an angle adjustment mechanism, which works in conjunction with the clamping mechanism to adjust the axial angle of the guide frame tube within the positioning seat, making the axial adjustment of the guide frame tube more convenient.

[0025] Other advantages, objectives and features of this patent will be set forth in part in the description which follows; and in part will be obvious to those skilled in the art based on an examination of the following text; or may be taught from the practice of this patent. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this patent. Figure 1 .

[0027] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this patent. Figure 2 .

[0028] Figure 3 This is a side view of the patent after the support frame has been removed.

[0029] Figure 4 This is a three-dimensional schematic diagram of the base of this patent.

[0030] Figure 5 This is a front view of the base of this patent.

[0031] Figure 6 This is a bottom view of the base of this patent.

[0032] Figure 7 This is a three-dimensional schematic diagram of the positioning seat of this patent.

[0033] Figure 8 For the purposes of this patent Figure 7 A three-dimensional schematic diagram of the positioning seat without the rear end cover.

[0034] Figure 9 This is a schematic cross-sectional view of the positioning seat of this patent.

[0035] Figure 10 This is a schematic diagram of the assembly on the drive shaft of this patent.

[0036] Figure 11 For the purposes of this patent Figure 9 A partial schematic diagram of point A.

[0037] Figure 12 This is a schematic diagram of the retracted state of the card-mounted structure of this patent.

[0038] Figure 13 This is a schematic diagram showing the distribution of the driving gear, driven gear, and drive wheel in this patent.

[0039] In the diagram: 1. Upright frame; 2. Base; 3. Guide rail; 4. Support plate; 5. Double-ended lead screw; 6. Positioning bracket; 7. Positioning seat; 8. Cavity; 9. Reinforcing plate; 10. Rotating shaft; 11. Drive wheel; 12. Driven gear; 13. Driving gear; 14. Drive shaft; 15. Rotating seat; 16. Positioning column; 17. Worm gear; 18. Cover; 19. Mesh cover; 20. Worm; 21. Support; 22. Mounting rod; 23. Clamping wheel; 24. Mounting cylinder; 25. Spring; 26. Positioning screw; 27. Threaded hole; 28. Support bracket; 29. ​​Overlapping slot; 30. Clamping frame. Detailed Implementation

[0040] The following will refer to the appendix in the embodiments of this patent. Figure 1-13 The technical solutions in the embodiments of this patent are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of the embodiments.

[0041] Example 1: To address the inconvenience of positioning and clamping during pipe welding of wind turbine jackets in the prior art, this example provides a welding positioning fixture for wind turbine jackets, comprising:

[0042] Frame 1, with a base 2 at its upper end;

[0043] A positioning bracket 6 is mounted on a base 2. The upper end of the positioning bracket 6 is provided with an inclined C-shaped positioning seat 7, with the upper end of the positioning seat 7 being open and the lower end being closed.

[0044] A support bracket 28 is provided on the base 2 at intervals from the positioning bracket 6, and the upper end of the support bracket 28 is provided with an arc-shaped stacking slot 29.

[0045] The clamping mechanism is located at the sealing end of the positioning seat 7 and is used to limit the pipe material of the guide frame within the positioning seat 7;

[0046] An angle adjustment mechanism is set on the bottom wall of the positioning seat 7 and works in conjunction with the clamping mechanism to adjust the axial angle of the guide frame pipe within the positioning seat 7.

[0047] Principle details of this embodiment:

[0048] A welding and positioning fixture for wind turbine jacket supports, comprising:

[0049] (1) Frame 1. The frame 1 is welded from metal materials. See Appendix Figure 1 As shown, the support frame 1 has a double-layer structure, with partitions on each layer for placing tools. The bottom of the support frame 1 is a base, with feet around its perimeter and mounting holes for anchoring to the ground. A base 2 is bolted to the top of the support frame 1, serving as the mounting foundation for the tooling. A pad is provided between the base 2 and the top of the support frame 1 to adjust the thickness for leveling, distribute the load to reduce localized pressure, and absorb vibration.

[0050] (2) Positioning bracket 6. The positioning bracket 6 is also welded from metal materials. The positioning bracket 6 consists of a base at the lower end, a support part in the middle, and a lifting part at the upper end. The base of the positioning bracket 6 is also fastened to the base 2 by bolts; the support part of the positioning bracket 6 consists of multiple spaced metal plates, which can ensure effective support stability and reduce the probability of bending deformation; the lifting part of the positioning bracket 6 is also fastened to the positioning seat 7 by bolts.

[0051] The positioning seat 7 is C-shaped with its open end facing upwards. The positioning seat 7 is installed at an angle on the supporting part of the positioning bracket 6. The side of the positioning seat 7 facing the axis of the base 2 is an upward-curved end, and the upward-curved end of the positioning seat 7 is open; the side of the positioning seat 7 away from the axis of the base 2 is a downward-sunken end, and the downward-sunken end of the positioning seat 7 is sealed.

[0052] The supporting part of the positioning bracket 6 is arc-shaped and fits against the outer wall of the positioning seat 7 to increase the contact area and improve support and connection stability.

[0053] The positioning seat 7 is hollow, meaning that the C-shaped structure of the positioning seat 7 has a certain thickness, while the interior is a cavity 8, which serves as the installation space for other components.

[0054] (3) Support bracket 28. The support bracket 28 is welded from metal materials. The support bracket 28 is also fastened to the base 2 by bolts, and is spaced apart from the positioning bracket 6 along the center line on the base 2.

[0055] The upper end of the support bracket 28 is provided with an arc-shaped stacking slot 29, and the stacking slot 29 has rounded corners. The stacking slot 29 is located at the extension position of the opening direction of the positioning seat 7.

[0056] (4) A clamping mechanism is set at the sealing end of the positioning seat 7 and is used to limit the pipe material of the guide frame in the positioning seat 7.

[0057] The clamping mechanism includes a support 21 disposed on the upper end face of the sealing end of the positioning seat 7. A right-angle mounting rod 22 is rotatably mounted on the support 21, and a mounting cylinder 24 is provided at the end of the mounting rod 22. The lower end of the mounting cylinder 24 is open, and a clamping frame 30 is slidably mounted in the opening. A spring 25 is provided between the clamping frame 30 and the mounting cylinder 24. Multiple sets of clamping wheels 23 are symmetrically rotatably mounted on the clamping frame 30. The mounting rod 22 is provided with an insertion hole, and the support 21 is provided with a threaded hole 27 that mates with the insertion hole. A positioning screw 26 is screwed into the threaded hole, and the positioning screw 26 mates with the insertion hole.

[0058] (5) Angle adjustment mechanism, which is set on the bottom wall of the positioning seat 7 and cooperates with the clamping mechanism, is used to adjust the axial angle of the guide frame pipe in the positioning seat 7.

[0059] The angle adjustment mechanism includes multiple rotating shafts 10 rotatably mounted within the cavity 8 of the positioning seat 7. Each rotating shaft 10 is axially spaced with drive wheels 11. The inner wall of the positioning seat 7 has notches corresponding to the drive wheels 11, from which the drive wheels 11 extend. The drive wheels 11 on the multiple rotating shafts 10 are circumferentially distributed with multiple locking wheels 23, i.e., they are distributed around the outer edge of the guide tube. Each rotating shaft 10 has a driven gear 12 at the end opposite to the opening of the positioning seat 7. The multiple driven gears 12 mesh with a driving gear 13 rotatably mounted on the inner wall of the sealed end of the positioning seat 7. The driving gear 13 is driven by the drive structure and can rotate, achieving self-locking.

[0060] Based on the above technical solution:

[0061] When using, please refer to the appendix. Figure 12 As described above, when the positioning screw 26 is unscrewed from the threaded hole 27, the clamping bracket 30 loses its limit and can be driven to deflect and rest on the top wall of the sealing end of the positioning seat 7, making way for the placement of the guide tube.

[0062] Then, one end of the pipe is placed on the positioning seat 7, and the other end or the upper part of the middle is placed on the placement slot 29 of the support bracket 28. Since the positioning seat 7 is tilted and the placement slot 29 of the support bracket 28 is in the extension direction of the opening of the positioning seat 7, the placed pipe is also tilted; and under its own weight, the pipe achieves self-positioning on the positioning seat 7.

[0063] Next, the clamping bracket 30 is aligned, and the clamping wheel 23 abuts against the outer surface of the pipe. Then, the positioning screw 26 is screwed back into the threaded hole 27 and through the insertion hole, thereby limiting the clamping bracket 30 and ensuring that the clamping wheel 23 is firmly abutted against the surface of the pipe. The pipe slides onto the positioning seat 7 and is again abutted by the clamping wheel 23, thus achieving the positioning and clamping of the pipe.

[0064] The drive structure drives the active gear 13 to rotate, which in turn drives multiple driven gears 12 to rotate synchronously and in the same direction, thereby driving the rotating shaft 10 to rotate. The rotating shaft 10 drives the drive wheel 11 to rotate, thereby driving the pipe to rotate in the state of being clamped by the drive wheel 11 and the clamping wheel 23.

[0065] It is suitable for butt welding of pipes, large-diameter pipes placed on positioning seat 7 and small-diameter pipes supported for butt welding, and fixed welding of small components on the guide frame.

[0066] In this embodiment, the mounting bracket 30 is arc-shaped so that the mounting wheels 23 distributed on the mounting bracket 30 are distributed around the pipe axis.

[0067] In this embodiment, multiple sets of support brackets 28 and positioning brackets 6 are arranged at intervals, which can be used for welding of multiple pipes separately, or for butt welding between pipes.

[0068] In this embodiment, multiple reinforcing plates 9 are spaced apart in the cavity 8 of the positioning seat 7, which are used to improve the strength of the positioning seat 7 and provide multiple points of support for the rotating shaft 10.

[0069] Preferably, in this embodiment, multiple rows of auxiliary brackets can be arranged on the base 2 along the center line of the support bracket 28 and the positioning bracket 6. Each row of auxiliary brackets is spaced apart along the same center line, and the structure of the auxiliary brackets is similar to that of the support bracket 28, with slots for placing pipes. In this way, when the pipes are butt-welded, the pipes to be butt-welded can be placed on the auxiliary brackets without manual support, improving convenience.

[0070] Example 2, a further embodiment of this solution, provides a drive structure that can achieve forward and reverse rotation and stepless self-locking.

[0071] The drive structure includes a worm gear 17 coaxially arranged with the drive gear 13. The worm gear 17 is located on the side of the drive gear 13 away from the opening of the positioning seat 7. The worm gear 17 meshes with a worm 20 rotatably mounted on the sealed end of the positioning seat 7. The end of the worm 20 is provided with a hexagonal connector. The hexagonal connector of the worm 20 is fitted with a ratchet wrench (not shown in the attached figure).

[0072] The ratchet wrench has a ratchet head at one end. When the handle is turned, the gear causes the ratchet to rotate, and the ratchet gear causes the ratchet wrench to generate a unidirectional rotational force.

[0073] Based on the above technical solution:

[0074] Place a ratchet wrench on the hexagonal joint of the worm gear 20. Turning the ratchet wrench will drive the worm gear 20 to rotate, which in turn drives the worm wheel 17 to rotate the coaxial drive gear 13. The self-locking nature of the worm wheel 17 and worm gear 20 structure enables both driving and self-locking of the drive gear 13.

[0075] In this embodiment, the driving structure further includes a drive shaft 14, as shown in the attached figure. Figure 10 As shown, the drive shaft 14 is a variable-diameter shaft with a stepped diameter that decreases from the middle to both ends. A rotating seat 15 is securely mounted on the sealed end of the positioning seat 7, and the smaller diameter end of the drive shaft 14 facing the opening of the positioning seat 7 is rotatably mounted within the rotating seat 15. The drive gear 13 is keyed and mounted between the variable-diameter end face of the drive shaft 14 and the rotating seat 15, and the worm gear 17 is keyed and mounted on the other smaller diameter end of the drive shaft 14, so as to achieve coaxial setting and spaced installation of the worm gear 17 and the drive gear 13. A stud is provided on the side of the drive shaft 14 away from the opening end of the positioning seat 7, and a cover 18 is screwed onto the stud to abut against the worm gear 17. The cover 18 abuts against the worm gear 17, thereby locking the worm gear 17 on the drive shaft 14.

[0076] In this embodiment, a collar is fitted onto the stud on the side of the cap 18 opposite to the worm gear 17. A mesh cover 19 is provided on the collar to secure the worm gear 17 and worm 20. A self-locking nut is also threaded onto the stud, abutting against the collar. During installation, the collar passes through the stud to secure the worm gear 17 and worm 20, isolating them to prevent hand pinching. The hexagonal connector of the worm 20 protrudes from the gap in the mesh cover 19, without affecting the ratchet wrench's engagement.

[0077] In this embodiment, the inner wall of the positioning seat 7, which mates with the rotating seat 15, has a ring array of multiple positioning posts 16, each with a screw hole. The bottom of the rotating seat 15 has a countersunk groove corresponding to each positioning post 16, and a through hole penetrating the edge of the rotating seat 15 is located in the center of the countersunk groove. A screw is screwed into the screw hole after passing through the through hole, thus achieving a secure installation of the rotating seat 15 on the positioning seat 7. Furthermore, compared to directly screwing on the screw, which can easily damage the screw threads due to the load acting on the screw, this connection structure of positioning posts 16 and countersunk grooves causes less damage to the screw and provides a more stable connection.

[0078] In a further embodiment of this solution (Example 3), two sets of guide rails 3 are symmetrically fastened to the base 2 with screws. Two support plates 4 are symmetrically slidably mounted on the two guide rails 3. Each end of the two support plates 4 is slidably connected to one of the guide rails 3. The positioning bracket 6 and the support bracket 28 are respectively fastened to the two support plates 4. A double-ended lead screw 5 is rotatably mounted on the base 2 between the two guide rails 3. The double-ended lead screw 5 has two ends with opposite directions of rotation. The double-ended lead screw 5 is driven by a motor mounted on the base 2 or manually operated by a crank handle. The two threads on the double-ended lead screw 5 are threadedly connected to the two support plates 4 respectively.

[0079] The support bracket 28 is an electric telescopic rod, and the mounting slot 29 is set at the extended end of the electric telescopic rod.

[0080] Based on the above technical solution:

[0081] By driving the double-ended lead screw 5 to rotate, the two support plates 4 can be controlled to move closer or further apart, thereby controlling the positioning seat 7 on the positioning bracket 6 to be closer or further apart from the overlapping slot 29 on the support bracket 28, to accommodate pipes of different lengths. The support bracket 28 is an electric telescopic rod used to adjust the height of the overlapping slot 29, which is suitable for the tilt angle of the positioning seat 7.

[0082] The above description is only a preferred embodiment of this patent, but the scope of protection of this patent is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this patent, based on the technical solution and concept of this patent, should be included within the scope of protection of this patent.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this patent. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of this patent have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this patent. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this patent.

Claims

1. A windmill jacket welding positioning tool, characterized in that, include: A support frame (1) is provided with a base (2) at the upper end of the support frame (1); A positioning bracket (6) is set on a base (2). The upper end of the positioning bracket (6) is provided with an inclined C-shaped positioning seat (7). The positioning seat (7) has an open upper end and a closed lower end. A support bracket (28) is provided on the base (2) at intervals from the positioning bracket (6), and the upper end of the support bracket (28) is provided with an arc-shaped stacking slot (29). The clamping mechanism is set at the sealing end of the positioning seat (7) and is used to limit the pipe material of the guide frame within the positioning seat (7); An angle adjustment mechanism is set on the bottom wall of the positioning seat (7) and works in conjunction with the clamping mechanism to adjust the axial angle of the guide frame pipe within the positioning seat (7).

2. The wind power tubular jacket welding positioning tooling according to claim 1, characterized in that, The clamping mechanism includes a support (21) set on the upper end face of the sealing end of the positioning seat (7), a right-angle mounting rod (22) is rotatably mounted on the support (21), a mounting cylinder (24) is provided at the end of the mounting rod (22), the lower end of the mounting cylinder (24) is open and a clamping frame (30) is slidably mounted in the opening, a spring (25) is provided between the clamping frame (30) and the mounting cylinder (24), and multiple sets of clamping wheels (23) are symmetrically rotatably mounted on the clamping frame (30); the mounting rod (22) is provided with an insertion hole, the support (21) is provided with a threaded hole (27) that mates with the insertion hole, a positioning screw (26) is screwed into the threaded hole, and the positioning screw (26) mates with the insertion hole.

3. The wind turbine jacket welding positioning fixture according to claim 2, characterized in that, The card holder (30) is arc-shaped.

4. The wind power tubular jacket welding positioning tooling according to claim 2, wherein, The angle adjustment mechanism includes multiple rotating shafts (10) rotatably mounted on the positioning seat (7). Each rotating shaft (10) is provided with drive wheels (11) spaced apart along the axial direction. The drive wheels (11) on the multiple rotating shafts (10) and multiple clamping wheels (23) are circumferentially distributed. Each rotating shaft (10) is provided with a driven gear (12) at the end away from the opening of the positioning seat (7). The multiple driven gears (12) mesh with a driving gear (13) rotatably mounted on the positioning seat (7). The driving gear (13) is driven by the drive structure and can rotate and achieve self-locking.

5. The windmill tubular jacket welding positioning tool according to claim 4, wherein, The drive structure includes a worm wheel (17) coaxially arranged with the drive gear (13). The worm wheel (17) is located on the side of the drive gear (13) away from the opening of the positioning seat (7). The worm wheel (17) meshes with a worm (20) rotatably installed at the sealing end of the positioning seat (7). The shaft end of the worm (20) is provided with a ratchet wrench.

6. The windmill tubular jacket welding positioning tool according to claim 5, wherein, The drive structure also includes a drive shaft (14), which is a variable diameter shaft with a diameter that tapers from the middle to both ends. A rotating seat (15) is fastened to the sealed end of the positioning seat (7). The small diameter of the drive shaft (14) facing the opening of the positioning seat (7) is rotatably installed in the rotating seat (15). The drive gear (13) is connected by a key and installed between the variable diameter end face of the drive shaft (14) and the rotating seat (15). The worm gear (17) is connected by a key and installed at the other small diameter end of the drive shaft (14). A stud is provided on the side of the drive shaft (14) away from the opening end of the positioning seat (7). A cap (18) is screwed onto the stud and abuts against the worm gear (17).

7. The windmill tubular jacket welding positioning tool according to claim 6, wherein, A collar is fitted on the stud on the side of the cap (18) away from the worm wheel (17). The collar is fitted with a mesh cover (19) that covers the worm wheel (17) and worm (20). A self-locking nut is also threaded onto the stud and rests against the collar.

8. The windmill tubular jacket welding positioning tool according to claim 1, wherein, Two sets of guide rails (3) are symmetrically fastened on the base (2). Two support plates (4) are symmetrically slidably installed on the two guide rails (3). The positioning bracket (6) and the support bracket (28) are respectively fastened on the two support plates (4). A double-ended screw (5) is rotatably installed on the base (2) between the two guide rails (3). The two threads on the double-ended screw (5) are respectively threaded to the two support plates (4). The support bracket (28) is an electric telescopic rod, and the mounting slot (29) is set at the extended end of the electric telescopic rod.

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