A hydraulic sizing mechanism for stiffened ring welding

Abstract

This invention relates to the field of stiffening ring welding technology, specifically providing a hydraulic shaping mechanism for stiffening ring welding. The mechanism includes a fixed frame, a rotating mechanism, and adjusting devices. The rotating mechanism is mounted on the fixed frame and includes a turntable. Multiple adjusting devices are arranged in a circular array on the turntable, supporting the inner wall of the steel pipe. A coarse adjustment mechanism is mounted on the turntable, and a fine adjustment mechanism is mounted on the coarse adjustment mechanism. The coarse adjustment mechanism can drive the fine adjustment mechanism to move radially along the turntable. The fine adjustment mechanism has a shaping panel that can fit against the inner wall of the steel pipe. The multiple adjusting mechanisms arranged in a circular array on the turntable of the rotating mechanism support the steel pipe. Each adjusting mechanism can be adjusted individually to meet the adjustment needs of different parts of the steel pipe, ensuring a closer fit between the surface of the steel pipe and the stiffening ring during welding. The rotating mechanism can also rotate the steel pipe, facilitating operation at any position on the steel pipe.

Description

Technical Field

[0001] This invention relates to the field of stiffening ring welding technology, and more particularly to a hydraulic shaping mechanism for stiffening ring welding. Background Technology

[0002] Pressure steel pipes are mainly used in water conservancy projects and are an indispensable component of water diversion projects. Some pressure steel pipes are used in the open air, while others are buried in concrete or underground. Due to their large diameter and harsh operating environment, stiffening rings are welded onto the steel pipes to enhance their strength and thus improve their service life.

[0003] A stiffening ring welding device, disclosed in patent document CN113751915A, includes a first rotating device, a first welding robot, and a second welding robot. The first rotating device comprises a support and roller assemblies, with the roller assemblies positioned on both sides of the upper end of the support. A steel pipe is mounted on the roller assemblies of the support. Each roller assembly on each side of the support includes two rotating cylinders, each rotatably mounted on the support, with the outer end face of each rotating cylinder contacting the outer end face of the steel pipe. The first welding robot is located inside the support, and the second welding robot is located on the side of the support. This patent utilizes the first welding robot to weld the side where the stiffening ring connects to the steel pipe. After each stiffening ring section is welded, the roller assemblies rotate the steel pipe by a certain angle to weld the next stiffening ring. Then, the second welding robot welds adjacent stiffening rings, improving the welding effect and efficiency of the stiffening rings. However, this patent still has some shortcomings: it cannot perform fine adjustments to the local areas of the steel pipe, resulting in a large gap between the steel pipe and the stiffening ring. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem of difficulty in making fine adjustments to the local parts of the steel pipe during stiffening ring welding, the present invention provides a hydraulic shaping mechanism for stiffening ring welding to solve the above problem.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a hydraulic shaping mechanism for stiffening ring welding, including a fixed frame, a rotating mechanism and an adjusting device. The rotating mechanism is mounted on the fixed frame and includes a turntable. At least one adjusting device is provided. The adjusting devices are arranged in a circular array on the turntable. The rotation of the turntable can drive the adjusting devices to move around the rotation center of the turntable. The adjusting devices are used to support the inner wall of the steel pipe.

[0006] Preferably, the adjustment device includes a coarse adjustment mechanism and a fine adjustment mechanism. The coarse adjustment mechanism is mounted on the turntable, and the fine adjustment mechanism is mounted on the coarse adjustment mechanism. The coarse adjustment mechanism can drive the fine adjustment mechanism to move radially along the turntable. The fine adjustment mechanism has a shaping panel that can fit against the inner wall of the steel pipe.

[0007] Preferably, the coarse adjustment mechanism includes a support frame, a lower support plate, an upper support plate, a first guide rail, a second guide rail, and a hydraulic cylinder. The support frame is fixed on the turntable, the lower support plate is fixed on the support frame, the first and second guide rails are fixed parallel to each other on the lower support plate, the upper support plate is slidably connected to the first and second guide rails, the tail end of the hydraulic cylinder is rotatably mounted on the support frame, the piston rod of the hydraulic cylinder is fixedly connected to the upper support plate, and the hydraulic cylinder can drive the upper support plate to move along the first and second guide rails.

[0008] Preferably, the lower surface of the support frame has multiple sets of mounting holes along the radial direction of the turntable, and the support frame can be fixed to the turntable using any set of mounting holes.

[0009] Preferably, the fine-tuning mechanism further includes a radial base, a first limiting pivot, an axial base, a second limiting pivot, a panel frame, two first springs, and two second springs. The radial base is fixedly connected to the upper support plate. The axial base is rotatably mounted on the radial base via the first limiting pivot. The panel frame is mounted on the axial base via the second limiting pivot. The two first springs are mirror-symmetrically arranged at both ends of the radial base, with each end of the first spring connected to the radial base and the shaping panel, respectively. The two second springs are mirror-symmetrically arranged at both ends of the axial base, with each end of the second spring connected to the axial base and the shaping panel, respectively.

[0010] Preferably, the center of the shaping panel protrudes outward to form an arc-shaped surface.

[0011] Preferably, the shaped panel has a groove on its arc-shaped surface, and the shape of the groove is adapted to the welding part of the steel pipe.

[0012] Preferably, the rotating mechanism further includes a base plate, an annular frame, an internal gear ring, a gear, and a motor. The base plate is fixed on the fixed frame, the annular frame is fixed on the base plate, the internal gear ring is rotatably mounted on the inner side of the annular frame, the turntable is fixedly connected to the internal gear ring, the gear meshes with the internal gear ring, the gear is fixedly connected to the output shaft of the motor, and the motor is fixed on the base plate.

[0013] Preferably, the base plate has multiple turntable fixing holes for locking the turntable.

[0014] The beneficial effects of this invention are as follows: First, it is equipped with a rotating mechanism and an adjusting mechanism. Multiple adjusting mechanisms are arranged in a circular array on the turntable of the rotating mechanism to support the steel pipe. Each adjusting mechanism can be adjusted individually to meet the adjustment requirements of different parts of the steel pipe, so as to ensure that the surface of the steel pipe fits more closely with the stiffening ring when welding the stiffening ring. The rotating mechanism can also drive the steel pipe to rotate, making it convenient to operate on any position of the steel pipe.

[0015] Secondly, a coarse adjustment mechanism is provided, which moves the upper support plate by means of a hydraulic cylinder, so that the upper support plate is closer to or farther from the inner wall of the steel pipe to accommodate steel pipes of different diameters. When the deformation of the steel pipe is large, it can also be pushed to quickly round it, so that the stiffening ring can quickly fit into the steel pipe, thereby improving the efficiency of welding the stiffening ring. When the diameter of the steel pipe exceeds the adjustment range of the hydraulic cylinder, the support frame can be removed and fixed on the turntable with another set of mounting holes, so that the overall position of the adjustment device can be adjusted, which facilitates fine adjustment of the steel pipe.

[0016] Thirdly, a fine-tuning mechanism is provided. When the steel pipe is deformed, the first rotating shaft is adjusted to different angles and the axial base is deflected, thereby controlling the shaping panel to tilt radially along the steel pipe. The second rotating shaft is adjusted to different angles and the panel frame is deflected, thereby controlling the shaping panel to tilt axially along the steel pipe. The tilted shaping panel can apply different pressures to different parts of the steel pipe, thereby performing local shaping of the steel pipe. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the preferred embodiment of a hydraulic shaping mechanism for stiffening ring welding according to the present invention;

[0019] Figure 2 This is a front structural schematic diagram of the adjustment device of a hydraulic shaping mechanism for stiffening ring welding according to the present invention;

[0020] Figure 3 This is a schematic diagram of the rear structure of the adjustment device of the hydraulic shaping mechanism for stiffening ring welding according to the present invention;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the fine-tuning mechanism of a hydraulic shaping mechanism for stiffening ring welding according to the present invention;

[0023] Figure 6This is a structural schematic diagram of the coarse adjustment mechanism of a hydraulic shaping mechanism for stiffening ring welding according to the present invention;

[0024] Figure 7 This is a schematic diagram of the rotating mechanism of a hydraulic shaping mechanism for stiffening ring welding according to the present invention.

[0025] Reference numerals: 1. Fixing frame; 2. Rotating mechanism; 3. Adjusting device; 4. Turntable; 5. Coarse adjustment mechanism; 6. Fine adjustment mechanism; 7. Shaping panel; 8. Support frame; 9. Lower support plate; 10. Upper support plate; 11. First guide rail; 12. Second guide rail; 13. Hydraulic cylinder; 14. Mounting hole; 15. Radial base; 16. First limiting shaft; 17. Axial base; 18. Second limiting shaft; 19. Panel frame; 20. First spring; 21. Second spring; 22. Groove; 23. Base plate; 24. Annular frame; 25. Internal gear ring; 26. Gear; 27. Motor; 28. Turntable fixing hole. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figures 1 to 7As shown, this invention provides an embodiment of a hydraulic shaping mechanism for stiffening ring welding, including a fixed frame 1, a rotating mechanism 2, and an adjusting device 3. The rotating mechanism 2 is mounted on the fixed frame 1 and includes a turntable 4, a base plate 23, an annular frame 24, an internal gear ring 25, a gear 26, and a motor 27. The base plate 23 is fixed to the fixed frame 1, the annular frame 24 is fixed to the base plate 23, the internal gear ring 25 is rotatably mounted inside the annular frame 24, the turntable 4 is fixedly connected to the internal gear ring 25, the gear 26 meshes with the internal gear ring 25, and the gear 26 is fixedly connected to the output shaft of the motor 27. The motor 27 is fixed to the base plate 23, and the base plate 23 has multiple turntable fixing holes 28 for locking the turntable 4, allowing the turntable 4 to rotate to any position. At least one adjustment device 3 is provided for fixing. The adjustment devices 3 are arranged in a circular array on the turntable 4. The adjustment devices 3 are used to support the inner wall of the steel pipe. Each adjustment device 3 can be adjusted individually to meet the adjustment requirements of different positions of the steel pipe during the welding of the stiffening ring. When welding the stiffening ring on the steel pipe, the inner wall of the steel pipe is first shaped and supported by multiple adjustment devices 3 to facilitate the adjustment of different parts of the steel pipe and avoid deformation of the steel pipe during welding. At the same time, the steel pipe needs to be rotated in time. At this time, the motor 27 drives the gear 26 and the internal gear ring 25 to rotate, so that the turntable 4 rotates. During the rotation of the turntable 4, the adjustment devices 3 move around the rotation center of the turntable 4 to rotate the steel pipe, so that the welding robot can weld at different positions.

[0028] The adjustment device 3 includes a coarse adjustment mechanism 5 and a fine adjustment mechanism 6. The coarse adjustment mechanism 5 is mounted on the turntable 4, and the fine adjustment mechanism 6 is mounted on the coarse adjustment mechanism 5. The coarse adjustment mechanism 5 can drive the fine adjustment mechanism 6 to move radially along the turntable 4. When supporting steel pipes of different diameters, the distance between the fine adjustment mechanism 6 and the steel pipe is first quickly adjusted by the coarse adjustment mechanism 5 so that the adjustment device 3 can support steel pipes of different diameters. Then, the fine adjustment mechanism 6 is used to locally shape and support the steel pipe to prevent deformation of the steel pipe.

[0029] The coarse adjustment mechanism 5 includes a support frame 8, a lower support plate 9, an upper support plate 10, a first guide rail 11, a second guide rail 12, and a hydraulic cylinder 13. The support frame 8 is fixed on the turntable 4, and the lower support plate 9 is fixed on the support frame 8. The first guide rail 11 and the second guide rail 12 are fixed parallel to each other on the lower support plate 9. The upper support plate 10 is slidably connected to the first guide rail 11 and the second guide rail 12. The tail end of the cylinder of the hydraulic cylinder 13 is rotatably mounted on the support frame 8, and the piston rod of the hydraulic cylinder 13 is fixedly connected to the upper support plate 10. When the coarse adjustment mechanism 5 is working, the hydraulic cylinder 13 drives the upper support plate 10 to move along the first guide rail 11 and the second guide rail 12, so that the upper support plate 10 is closer to or further away from the inner wall of the steel pipe to accommodate steel pipes of different diameters. When the deformation of the steel pipe is large, the hydraulic cylinder 13 can also be used to push the steel pipe to quickly round it, so that the stiffening ring can quickly fit with the steel pipe, thereby improving the efficiency of the stiffening ring welding.

[0030] Multiple sets of mounting holes 14 are opened on the lower surface of the support frame 8 along the radial direction of the turntable 4. The support frame 8 can be fixed on the turntable 4 using any set of mounting holes 14. When the diameter of the steel pipe exceeds the adjustable range of the hydraulic cylinder 13, the support frame 8 can be removed and fixed on the turntable 4 using another set of mounting holes 14. This allows for the overall adjustment of the position of the adjustment device 3, facilitating fine adjustment of steel pipes of various diameters.

[0031] The fine-tuning mechanism 6 includes a shaping panel 7, a radial base 15, a first limiting pivot 16, an axial base 17, a second limiting pivot 18, a panel frame 19, two first springs 20, and two second springs 21. The shaping panel 7 has an outwardly protruding arc-shaped surface in the middle, allowing it to fit snugly against the inner wall of the steel pipe, thus providing better support. A groove 22 is provided on the arc-shaped surface of the shaping panel 7, the shape of which matches the welding area of ​​the steel pipe, so that the shaping panel can hold the welding area of ​​the steel pipe, preventing damage during the shaping process. During the process, the steel pipe slips, the radial base 15 is fixedly connected to the upper support plate 10, the axial base 17 is rotatably mounted on the radial base 15 through the first limiting pivot 16, the panel frame 19 is mounted on the axial base 17 through the second limiting pivot 18, two first springs 20 are mirror-symmetrically arranged at both ends of the radial base 15, and the two ends of the first springs 20 are respectively connected to the radial base 15 and the shaping panel 7, and two second springs 21 are mirror-symmetrically arranged at both ends of the axial base 17, and the two ends of the second springs 21 are respectively connected to the axial base 17 and the shaping panel 7.

[0032] The working principle of the fine-tuning mechanism 6 is as follows: When the steel pipe is deformed, the first limiting shaft 16 is rotated to adjust the first shaft to different angles and drive the axial base 17 to deflect, thereby controlling the shaping panel 7 to tilt radially along the steel pipe. The second limiting shaft 18 is rotated to adjust the second shaft to different angles and drive the panel frame 19 to deflect, thereby controlling the shaping panel 7 to tilt axially along the steel pipe. The tilted shaping panel 7 can apply different pressures to different parts of the steel pipe, thereby performing local shaping of the steel pipe. When the shaping panel 7 contacts the steel pipe, it is buffered by the first spring 20 and the second spring 21 to avoid the shaping panel 7 colliding with the steel pipe and causing the steel pipe to deform.

[0033] In the description of this specification, 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 the invention. In this specification, illustrative expressions of 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.

[0034] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulic forming mechanism for stiffening ring welding, characterized in that: The device includes a fixed frame (1), a rotating mechanism (2), and an adjusting device (3). The rotating mechanism (2) is mounted on the fixed frame (1) and includes a turntable (4). At least one adjusting device (3) is provided. The adjusting devices (3) are arranged in a circular array on the turntable (4). The rotation of the turntable (4) can drive the adjusting devices (3) to move around the rotation center of the turntable (4). The adjusting devices (3) are used to support the inner wall of the steel pipe. The adjustment device (3) includes a coarse adjustment mechanism (5) and a fine adjustment mechanism (6). The coarse adjustment mechanism (5) is mounted on the turntable (4), and the fine adjustment mechanism (6) is mounted on the coarse adjustment mechanism (5). The coarse adjustment mechanism (5) can drive the fine adjustment mechanism (6) to move radially along the turntable (4). The fine adjustment mechanism (6) has a shaping panel (7), which can fit against the inner wall of the steel pipe. The coarse adjustment mechanism (5) includes a support frame (8), a lower support plate (9), an upper support plate (10), a first guide rail (11), a second guide rail (12), and a hydraulic cylinder (13). The support frame (8) is fixed on the turntable (4), the lower support plate (9) is fixed on the support frame (8), the first guide rail (11) and the second guide rail (12) are fixed parallel to each other on the lower support plate (9), and the upper support plate (10) is slidably connected to the first guide rail (11) and the second guide rail (12). The fine-tuning mechanism (6) further includes a radial base (15), a first limiting pivot (16), an axial base (17), a second limiting pivot (18), a panel frame (19), two first springs (20) and two second springs (21). The radial base (15) is fixedly connected to the upper support plate (10). The axial base (17) is rotatably mounted on the radial base (15) via the first limiting pivot (16). The panel frame (19) is mounted on the axial base (17) via the second limiting pivot (18). The two first springs (20) are mirror-symmetrically arranged at both ends of the radial base (15). The two ends of the first springs (20) are respectively connected to the radial base (15) and the shaping panel (7). The two second springs (21) are mirror-symmetrically arranged at both ends of the axial base (17). The two ends of the second springs (21) are respectively connected to the axial base (17) and the shaping panel (7).

2. The hydraulic forming mechanism for stiffening ring welding as described in claim 1, characterized in that: The cylinder body of the hydraulic cylinder (13) is rotatably mounted on the support frame (8). The piston rod of the hydraulic cylinder (13) is fixedly connected to the upper support plate (10). The hydraulic cylinder (13) can drive the upper support plate (10) to move along the first guide rail (11) and the second guide rail (12).

3. The hydraulic forming mechanism for stiffening ring welding as described in claim 2, characterized in that: The lower surface of the support frame (8) has multiple sets of mounting holes (14) radially along the turntable (4), and the support frame (8) can be fixed on the turntable (4) using any set of mounting holes (14).

4. The hydraulic forming mechanism for stiffening ring welding as described in claim 1, characterized in that: The center of the shaping panel (7) protrudes outward to form an arc-shaped surface.

5. A hydraulic forming mechanism for stiffening ring welding as described in claim 1, characterized in that: The shaped panel (7) has a groove (22) on its arc surface, and the shape of the groove (22) is adapted to the welding part of the steel pipe.

6. The hydraulic forming mechanism for stiffening ring welding as described in claim 1, characterized in that: The rotating mechanism (2) further includes a base plate (23), an annular frame (24), an internal gear ring (25), a gear (26), and a motor (27). The base plate (23) is fixed on the fixed frame (1), the annular frame (24) is fixed on the base plate (23), the internal gear ring (25) is rotatably mounted on the inner side of the annular frame (24), the turntable (4) is fixedly connected to the internal gear ring (25), the gear (26) meshes with the internal gear ring (25), the gear (26) is fixedly connected to the output shaft of the motor (27), and the motor (27) is fixed on the base plate (23).

7. A hydraulic forming mechanism for stiffening ring welding as described in claim 6, characterized in that: The base plate (23) has multiple turntable fixing holes (28) for locking the turntable (4).

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