Tailor-welding device and tailor-welding method for large curved surface end socket of pressure vessel

Abstract

The invention belongs to the technical field of seal head tailor-welding devices, and discloses a pressure vessel large curved surface seal head tailor-welding device and tailor-welding method.The pressure vessel large curved surface seal head tailor-welding device comprises a tailor-welding box body, a rotating structure and a welding structure are arranged in the tailor-welding box body, and arc-shaped petals are installed in the tailor-welding box body through fixing assemblies; the fixing assembly comprises a base fixedly installed in the tailor-welded box body, moving seats are arranged at the top end of the base and evenly distributed in an annular array mode, and a first fixing plate and a second fixing plate are installed at the top end of each moving seat. And after each arc-shaped petal is placed, the second fixing plates are made to get close to one side of the first fixing plate so as to fix the arc-shaped petals, the arc-shaped petals are fixed through synchronous movement of the multiple second fixing plates, the fixing efficiency is improved, and the curved surface seal head tailor-welding efficiency is indirectly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of end cap welding devices, and in particular relates to an end cap welding device and a method for large curved end caps of pressure vessels. Background Art

[0002] The head welding device is a device specially used to splice and weld multiple head components together, especially playing an important role in the manufacturing process of large equipment such as pressure vessels;

[0003] After searching, such as patent: CN222037319U, a pressure vessel head welding device comprises a fixed box, the bottom of the fixed box is fixedly installed with support legs, the number of the support legs is four and evenly arranged at the four corners of the bottom of the fixed box, the inner top of the fixed box is fixedly installed with a first hydraulic cylinder, the inner side of the fixed box is provided with a welding mechanism, and the inner bottom of the fixed box is provided with a fixing mechanism. The pressure vessel head welding device is provided with a welding mechanism, which is convenient for annular welding around the welding part of the pressure vessel head, thereby improving the efficiency of the welding work, and at the same time, the height and horizontal position of the welding head are adjusted, which is convenient for adjustment according to the size and height of the pressure vessel, thereby improving the practicality of the device, and a fixing mechanism is provided to fix the body of the pressure vessel, thereby preventing the position of the pressure vessel from being offset during the welding process, thereby improving the welding effect;

[0004] After searching, patent: CN103862215B is a universal welding tooling device and method for large curved heads of pressure vessels, including a supporting chassis, a ball screw, a group of rolling bearings, a mobile cylinder, an external positioning block, an internal positioning block, a manual rocker and a scale. The ball screw and the actuator respectively drive the majority of external positioning blocks and internal positioning blocks to move along the guide rails of the supporting chassis to position and clamp the curved head assembly. The invention can realize the tooling positioning of large heads in pressure vessel manufacturing and prevent welding deformation. The curved head is placed on the device for assembly, positioning and clamping, and then spot fixation is performed at the weld and then welding of the internal and external welds is performed. After welding is completed, it is naturally cooled to room temperature and then stress relief annealing is performed, which reduces the labor intensity of workers, shortens the production cycle of products, and reduces production costs.

[0005] There are some limitations in the welding devices currently available on the market, especially in dealing with the fixation of curved heads. Specifically, these devices are either unable to adapt to the fixation of curved heads, or are unable to achieve simultaneous fixation of multiple arc petals during the fixation operation, thus affecting the welding efficiency of curved heads. Summary of the invention

[0006] The object of the present invention is to provide a large curved head welding device and a welding method for a pressure vessel to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a large curved head welding device for a pressure vessel, comprising a welding box, a rotating structure and a welding structure are arranged inside the welding box, and an arc-shaped petal is installed inside the welding box through a fixing component;

[0008] The fixing assembly comprises a base fixedly mounted inside the tailor-welded box body, a movable seat is arranged at the top of the base, the movable seats are evenly distributed in a circular array, a first fixing plate and a second fixing plate are installed at the top of each of the movable seats, the first fixing plate and the second fixing plate are arranged on both sides of the arc-shaped petal, a slider is fixedly connected to the bottom end of the second fixing plate, a threaded rod is threadedly connected to the inner wall of the slider, a first rotating shaft is embedded in the inner wall of the threaded rod, a connecting rod is fixedly mounted on the outer wall of the first rotating shaft, and a first gear is fixedly connected to the end of the first rotating shaft away from the threaded rod;

[0009] A motor is arranged inside the welded box body, a second rotating shaft is installed at the top of the motor, a first ring gear is fixedly connected to the top of the second rotating shaft, and the first ring gear is arranged below the first gear and meshedly connected.

[0010] As a further technical solution of the present invention, the first fixing plate is slidably mounted inside the moving seat, and a spring is provided between the first fixing plate and the moving seat.

[0011] As a further technical solution of the present invention, one side of the first fixing plate and the second fixing plate close to the arc-shaped petal are both configured to be arc-shaped.

[0012] As a further technical solution of the present invention, the movable seat is slidably mounted on the top of the base, and an adjustment component is arranged between the movable seat and the base.

[0013] As a further technical solution of the present invention, the threaded rod is slidably connected to the first rotating shaft.

[0014] As a further technical solution of the present invention, one end of the movable seat is fixedly connected with a connecting plate, and the connecting plate is sleeved on the outer wall of the threaded rod.

[0015] As a further technical solution of the present invention, the adjustment assembly includes a second ring gear arranged inside the base, the inner wall of the second ring gear is meshedly connected with a third gear, the third gears are evenly distributed in a ring array, one side of each of the third gears is meshedly connected with a rack plate, and the rack plate is fixedly mounted on the bottom end of the moving base;

[0016] As a further technical solution of the present invention, the transmission assembly includes a worm wheel fixedly mounted on the outer wall of the third rotating shaft, one side of the worm wheel is meshingly connected with a worm, one end of the worm is fixedly connected with a handwheel, and the handwheel is arranged on one side of the base.

[0017] As a further technical solution of the present invention, a support column is fixedly installed on the top of the base, and a support platform is fixedly connected to the top of the support column.

[0018] A welding method for a large curved head welding device for a pressure vessel comprises the following steps:

[0019] S1: When welding the curved head, first adjust the position of the fixed component according to the diameter of the curved head, and drive the rotation of the worm by turning the hand wheel, and the rotation of the worm drives the rotation of the worm wheel, and the rotation of the worm wheel drives the rotation of one of the third rotating shafts, and the rotation of the third rotating shaft drives the rotation of the third gear, and the rotation of the third gear drives the rotation of other third gears through the second ring gear transmission, and the rotation of the third gear drives the rack plate to move, and the movement of the rack plate drives the movement of the moving seat, so that the multiple moving seats are synchronously telescopically moved with the center of the base as the axis;

[0020] S2: Then the arc-shaped petal is placed between the first fixing plate and the second fixing plate. After each arc-shaped petal is placed, the motor is started to drive the second rotating shaft to rotate. When the second rotating shaft rotates, it drives the first ring gear to rotate. The rotation of the first ring gear drives the first gears at the top to rotate. The rotation of the first gear drives the rotation of the first rotating shaft. The rotation of the first rotating shaft drives the rotation of the threaded rod. The rotation of the threaded rod drives the movement of the slider. The movement of the slider drives the movement of the second fixing plate, so that the second fixing plate is close to one side of the first fixing plate, thereby fixing the arc-shaped petal.

[0021] S3: Finally, the arc petals are welded by the rotating structure and the welding structure.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention arranges a fixing component. When welding the curved head, the arc petal is first placed between the first fixing plate and the second fixing plate. After each arc petal is placed, the motor is started to drive the second rotating shaft to rotate. The rotation of the second rotating shaft drives the rotation of the first annular gear. The rotation of the first annular gear drives the rotation of several first gears at the top. The rotation of the first gear drives the rotation of the first rotating shaft. The rotation of the first rotating shaft drives the rotation of the threaded rod. The rotation of the threaded rod drives the movement of the slider. The movement of the slider drives the movement of the second fixing plate, so that the second fixing plate is close to one side of the first fixing plate to fix the arc petal. This not only improves the fixing efficiency, but also indirectly improves the welding efficiency of the curved head.

[0024] 2. The present invention uses the elastic potential energy of the spring to ensure that the first fixing plate always has a tendency to move toward the second fixing plate. When the arc-shaped petals are placed, the arc-shaped petals can be pre-fixed by the first fixing plate and the second fixing plate. After all the arc-shaped petals are placed, the second fixing plate can be moved to stably fix them, thereby improving the convenience of fixing the arc-shaped petals.

[0025] 3. The present invention, through the setting of the adjustment component, when it is necessary to weld curved heads with different diameters, drives one of the third rotating shafts to rotate through the transmission component, the rotation of the third rotating shaft drives the rotation of the third gear, the rotation of the third gear drives the rotation of other third gears through the second ring gear transmission, the rotation of the third gear drives the rack plate to move, the movement of the rack plate drives the movement of the moving seat, so that several moving seats can be synchronously telescopically moved with the center of the base as the axis, which is convenient for fixing curved heads with different diameters and improves the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the base of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the structure at the base of the present invention;

[0029] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0030] Figure 5 It is a structural schematic diagram of the mobile seat of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the second ring gear of the present invention;

[0032] Figure 7 It is a schematic cross-sectional view of the structure of the movable seat of the present invention.

[0033] In the figure: 1. welded box body; 2. rotating structure; 3. welding structure; 4. arc petal; 5. base; 6. moving seat; 7. first fixed plate; 8. second fixed plate; 9. slider; 10. threaded rod; 11. connecting plate; 12. first rotating shaft; 13. connecting rod; 14. first gear; 15. first ring gear; 16. second rotating shaft; 17. motor; 18. spring; 19. support column; 20. support table; 21. rack plate; 22. third gear; 23. third rotating shaft; 24. worm gear; 25. worm; 26. hand wheel; 27. second ring gear. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 7 As shown, in an embodiment of the present invention, a large curved head welding device for a pressure vessel includes a welding box 1, a rotating structure 2 and a welding structure 3 are arranged inside the welding box 1, and an arc-shaped petal 4 is installed inside the welding box 1 through a fixing component;

[0036] The fixing assembly includes a base 5 fixedly installed inside the tailor-welded box 1, a moving seat 6 is arranged on the top of the base 5, and the moving seats 6 are evenly distributed in a circular array, and a first fixing plate 7 and a second fixing plate 8 are installed on the top of each moving seat 6, and the first fixing plate 7 and the second fixing plate 8 are arranged on both sides of the arc-shaped petal 4, and a slider 9 is fixedly connected to the bottom end of the second fixing plate 8, and a threaded rod 10 is threadedly connected to the inner wall of the slider 9, and a first rotating shaft 12 is embedded in the inner wall of the threaded rod 10, and a connecting rod 13 is fixedly installed on the outer wall of the first rotating shaft 12, and a first gear 14 is fixedly connected to the end of the first rotating shaft 12 away from the threaded rod 10;

[0037] A motor 17 is arranged inside the welded box body 1, a second rotating shaft 16 is installed at the top of the motor 17, a first ring gear 15 is fixedly connected to the top of the second rotating shaft 16, and the first ring gear 15 is arranged below the first gear 14 and meshingly connected.

[0038] Existing: CN222037319U discloses a pressure vessel head welding device, which discloses the welded box body 1, the rotating structure 2 and the welding structure 3 proposed in this application document, and this technical means will not be described one by one here;

[0039] When welding the curved head, first place the arc-shaped petal 4 between the first fixing plate 7 and the second fixing plate 8. After each arc-shaped petal 4 is placed, start the motor 17 to drive the second rotating shaft 16 to rotate. When the second rotating shaft 16 rotates, it drives the first ring gear 15 to rotate. The rotation of the first ring gear 15 drives the first gears 14 at the top to rotate. The rotation of the first gear 14 drives the rotation of the first rotating shaft 12. The rotation of the first rotating shaft 12 drives the rotation of the threaded rod 10. The rotation of the threaded rod 10 drives the movement of the slider 9. The movement of the slider 9 drives the movement of the second fixing plate 8, so that the second fixing plate 8 is close to one side of the first fixing plate 7, thereby fixing the arc-shaped petal 4.

[0040] In the device, the arc-shaped petals 4 are fixed by synchronously moving a plurality of second fixing plates 8, which not only improves the fixing efficiency, but also indirectly improves the welding efficiency of the curved head.

[0041] like Figure 3 and Figure 7 As shown, the first fixed plate 7 is slidably installed inside the moving seat 6, and a spring 18 is arranged between the first fixed plate 7 and the moving seat 6.

[0042] The top ends of the first fixing plate 7 and the second fixing plate 8 are both configured as arc surfaces, so as to facilitate the placement of the arc-shaped petal 4 between the first fixing plate 7 and the second fixing plate 8;

[0043] The elastic potential energy of the spring 18 ensures that the first fixing plate 7 always has a tendency to move toward the second fixing plate 8. When the arc-shaped petals 4 are placed in, the arc-shaped petals 4 can be pre-fixed by the first fixing plate 7 and the second fixing plate 8. After all the arc-shaped petals 4 are placed in, they can be stably fixed by moving the second fixing plate 8, thereby improving the convenience of fixing the arc-shaped petals 4.

[0044] like Figure 3 , Figure 5 and Figure 7 As shown, one side of the first fixing plate 7 and the second fixing plate 8 close to the arc-shaped petal 4 is both configured to be arc-shaped.

[0045] The arc surface design makes the first fixing plate 7 and the second fixing plate 8 more consistent with the fitting surface of the arc petal 4, reducing the gap that may be generated when the flat surface and the curved surface are fitted, thereby improving the fitting tightness, which helps to enhance the fixing effect of the head.

[0046] like Figures 1 to 3 As shown, the movable seat 6 is slidably installed on the top of the base 5, and an adjustment component is arranged between the movable seat 6 and the base 5.

[0047] like Figures 1 to 7 As shown, the threaded rod 10 is slidably connected to the first rotating shaft 12 .

[0048] like Figures 1 to 7 As shown, one end of the movable seat 6 is fixedly connected to a connecting plate 11 , and the connecting plate 11 is sleeved on the outer wall of the threaded rod 10 .

[0049] The adjustment assembly includes a second ring gear 27 disposed inside the base 5, the inner wall of the second ring gear 27 is meshedly connected with a third gear 22, the third gears 22 are evenly distributed in a ring array, one side of each third gear 22 is meshedly connected with a rack plate 21, and the rack plate 21 is fixedly mounted on the bottom end of the moving base 6;

[0050] The inner wall of each third gear 22 is fixedly connected with a third rotating shaft 23 , and one of the third rotating shafts 23 is rotatably mounted inside the base 5 via a transmission assembly.

[0051] The inner wall of each third gear 22 is fixedly connected with a third rotating shaft 23 , and one of the third rotating shafts 23 is rotatably mounted inside the base 5 via a transmission assembly.

[0052] When it is necessary to weld curved heads of different diameters, one of the third rotating shafts 23 is driven to rotate through the transmission assembly, and the rotation of the third rotating shaft 23 drives the rotation of the third gear 22. The rotation of the third gear 22 drives the other third gears 22 to rotate through the second ring gear 27. The rotation of the third gear 22 drives the rack plate 21 to move, and the movement of the rack plate 21 drives the movement of the moving seat 6, so that several moving seats 6 can be synchronously telescopically moved with the center of the base 5 as the axis, which is convenient for fixing curved heads of different diameters and improves the adaptability of the device.

[0053] like Figure 3 , Figure 6 and Figure 7 As shown, the transmission assembly includes a worm wheel 24 fixedly mounted on the outer wall of the third rotating shaft 23 , one side of the worm wheel 24 is meshedly connected with a worm 25 , one end of the worm 25 is fixedly connected with a hand wheel 26 , and the hand wheel 26 is arranged on one side of the base 5 .

[0054] During adjustment, the worm 25 is driven to rotate by rotating the hand wheel 26, the rotation of the worm 25 drives the rotation of the worm wheel 24, and the rotation of the worm wheel 24 drives the rotation of the third rotating shaft 23. The transmission of the worm 25 and the worm wheel 24 has a self-locking property, which improves the stability of the movable seat 6 during movement and adjustment.

[0055] like Figure 3 and Figure 4 As shown, a support column 19 is fixedly installed on the top of the base 5, and a support platform 20 is fixedly connected to the top of the support column 19.

[0056] The outer wall of the support platform 20 is a curved surface;

[0057] When installing the arc-shaped petal 4, the top of the arc-shaped petal 4 is located at the top of the support platform 20. The arc-shaped petal 4 is supported by the support platform 20, which not only improves the convenience of fixing the arc-shaped petal 4, but also improves the stability during welding.

[0058] A welding method for a large curved head welding device for a pressure vessel comprises the following steps:

[0059] S1: When welding the curved head, first adjust the position of the fixing assembly according to the diameter of the curved head, and drive the worm 25 to rotate by turning the hand wheel 26, and the rotation of the worm 25 drives the rotation of the worm wheel 24, and the rotation of the worm wheel 24 drives the rotation of one of the third rotating shafts 23, and the rotation of the third rotating shaft 23 drives the rotation of the third gear 22, and the rotation of the third gear 22 drives the rotation of other third gears 22 through the second ring gear 27, and the rotation of the third gear 22 drives the rack plate 21 to move, and the movement of the rack plate 21 drives the movement of the moving seat 6, so that the multiple moving seats 6 are synchronously telescopically moved with the center of the base 5 as the axis;

[0060] S2: Then the arc-shaped petal 4 is placed between the first fixing plate 7 and the second fixing plate 8. After each arc-shaped petal 4 is placed, the motor 17 is started to drive the second rotating shaft 16 to rotate. When the second rotating shaft 16 rotates, it drives the first ring gear 15 to rotate. The rotation of the first ring gear 15 drives the first gears 14 at the top to rotate. The rotation of the first gear 14 drives the rotation of the first rotating shaft 12. The rotation of the first rotating shaft 12 drives the rotation of the threaded rod 10. The rotation of the threaded rod 10 drives the movement of the slider 9. The movement of the slider 9 drives the movement of the second fixing plate 8, so that the second fixing plate 8 is close to one side of the first fixing plate 7, thereby fixing the arc-shaped petal 4.

[0061] S3: Finally, the arc-shaped petals 4 are welded by the rotating structure 2 and the welding structure 3.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large curved head welding device for a pressure vessel, comprising a welding box (1), characterized in that: The welded box body (1) is provided with a rotating structure (2) and a welding structure (3) inside, and an arc-shaped petal (4) is installed inside the welded box body (1) via a fixing assembly; The fixing assembly comprises a base (5) fixedly mounted inside the tailor-welded box (1); a movable seat (6) is arranged at the top of the base (5); the movable seats (6) are evenly distributed in a ring array; a first fixing plate (7) and a second fixing plate (8) are installed at the top of each of the movable seats (6); the first fixing plate (7) and the second fixing plate (8) are arranged on both sides of the arc-shaped petal (4); a slider (9) is fixedly connected to the bottom end of the second fixing plate (8); a threaded rod (10) is threadedly connected to the inner wall of the slider (9); a first rotating shaft (12) is embedded in the inner wall of the threaded rod (10); a connecting rod (13) is fixedly mounted on the outer wall of the first rotating shaft (12); and a first gear (14) is fixedly connected to the end of the first rotating shaft (12) away from the threaded rod (10); A motor (17) is arranged inside the welded box body (1), a second rotating shaft (16) is installed at the top end of the motor (17), a first ring gear (15) is fixedly connected to the top end of the second rotating shaft (16), and the first ring gear (15) is arranged below the first gear (14) and is meshingly connected.

2. A large curved head welding device for pressure vessels according to claim 1, characterized in that: The first fixed plate (7) is slidably mounted inside the movable seat (6), and a spring (18) is provided between the first fixed plate (7) and the movable seat (6).

3. A large curved head welding device for pressure vessels according to claim 1, characterized in that: The first fixing plate (7) and the second fixing plate (8) are both arranged in an arc shape on one side close to the arc-shaped petal (4).

4. A large curved head welding device for pressure vessels according to claim 1, characterized in that: The movable seat (6) is slidably mounted on the top of the base (5), and an adjustment component is provided between the movable seat (6) and the base (5).

5. The large curved head welding device for pressure vessels according to claim 1 is characterized in that: The threaded rod (10) is slidably connected to the first rotating shaft (12).

6. The large curved head welding device for pressure vessels according to claim 1, characterized in that: One end of the movable seat (6) is fixedly connected to a connecting plate (11), and the connecting plate (11) is sleeved on the outer wall of the threaded rod (10).

7. The large curved head welding device for pressure vessels according to claim 4, characterized in that: The adjustment assembly comprises a second ring gear (27) arranged inside the base (5); the inner wall of the second ring gear (27) is meshedly connected with a third gear (22); the third gears (22) are evenly distributed in a ring array; one side of each of the third gears (22) is meshedly connected with a rack plate (21); the rack plate (21) is fixedly mounted on the bottom end of the moving base (6); The inner wall of each of the third gears (22) is fixedly connected to a third rotating shaft (23), and one of the third rotating shafts (23) is rotatably mounted inside the base (5) via a transmission assembly.

8. A large curved head welding device for pressure vessels according to claim 7, characterized in that: The transmission assembly comprises a worm wheel (24) fixedly mounted on the outer wall of the third rotating shaft (23); one side of the worm wheel (24) is meshingly connected to a worm (25); one end of the worm (25) is fixedly connected to a hand wheel (26); and the hand wheel (26) is arranged on one side of the base (5).

9. The large curved head welding device for pressure vessels according to claim 1, characterized in that: A support column (19) is fixedly mounted on the top of the base (5), and a support platform (20) is fixedly connected to the top of the support column (19).

10. A welding method for a large curved head welding device for a pressure vessel, the method being applicable to a large curved head welding device for a pressure vessel as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When welding the curved head, firstly, the position of the fixing assembly is adjusted according to the diameter of the curved head, and the worm (25) is driven to rotate by rotating the hand wheel (26), and the rotation of the worm (25) drives the rotation of the worm wheel (24), and the rotation of the worm wheel (24) drives the rotation of one of the third rotating shafts (23), and the rotation of the third rotating shaft (23) drives the rotation of the third gear (22), and the rotation of the third gear (22) drives the rotation of other third gears (22) through the second ring gear (27), and the rotation of the third gear (22) drives the rack plate (21) to move, and the movement of the rack plate (21) drives the movement of the moving seat (6), so that the plurality of moving seats (6) are synchronously telescopically moved with the center of the circle of the base (5) as the axis; S2: Then, the arc-shaped petal (4) is placed between the first fixing plate (7) and the second fixing plate (8). After each arc-shaped petal (4) is placed, the motor (17) is started to drive the second rotating shaft (16) to rotate. When the second rotating shaft (16) rotates, it drives the first ring gear (15) to rotate. The rotation of the first ring gear (15) drives the first gears (14) at the top to rotate. The rotation of the first gear (14) drives the first rotating shaft (12). The rotation of the first rotating shaft (12) drives the rotation of the threaded rod (10). The rotation of the threaded rod (10) drives the movement of the slider (9). The movement of the slider (9) drives the movement of the second fixing plate (8), so that the second fixing plate (8) is close to one side of the first fixing plate (7) to fix the arc-shaped petal (4). S3: Finally, the arc-shaped petal (4) is welded by the rotating structure (2) and the welding structure (3).

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