Welding device for tank top plate of large storage tank

Abstract

The invention discloses a welding device for a large storage tank top plate, and belongs to the technical field of large storage tank top plate welding, the welding device comprises a supporting frame and a bearing device, the supporting frame is used for supporting a plurality of melon rind plates, and the supporting frame comprises a high supporting plate close to the center and a low supporting plate located on the periphery; the bearing device comprises a stand column located in the center and an annular rail located on the periphery of the low supporting plate, a bearing plate is arranged between the stand column and the annular rail, the standing load of a worker is transferred to the independent bearing plate, and the situation that gravity directly acts on a melon rind plate butt joint seam is avoided. A gap is reserved between the bearing plate and the melon rind plate, and the arc surface of the bottom surface is attached to the radian of the melon rind plate, so that the problems of offset and deformation of a butt joint caused by artificial load are thoroughly eliminated while the convenience of short-distance welding operation is kept, the initial positioning precision of welding is fundamentally guaranteed, and the welding quality is improved. And the defects of different widths of welding seams, overproof alignment tolerance and the like caused by deformation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of welding of large storage tank roof plates, and particularly relates to a welding device for large storage tank roof plates. Background Art

[0002] A large storage tank is a common storage device in the petrochemical industry and an important part of petrochemical plants and storage and transportation system facilities. Each tank mainly consists of a tank bottom, a tank wall, a tank top and related accessories, and the tank top is assembled by welding several gore plates.

[0003] In the prior art, oil workers need to stand on the gore plates to perform welding operations on the gore plates during the splicing process. During welding, due to the small distance between the welding position and the worker's standing position, the worker's own gravity will directly act on the gore plates, causing the butting joints of the gore plates to bear additional pressure and stress. Under the influence of this external force, the butting joints of the gore plates near the worker are prone to deformation, which in turn leads to misalignment of the butting seams. The misalignment of the butting seams will damage the welding accuracy, resulting in problems such as irregular weld formation and insufficient welding strength. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that in the above-mentioned prior art, the worker's own gravity directly acts on the gore plates, causing the butting joints of the gore plates to bear additional pressure and stress. Under the influence of this external force, the butting joints of the gore plates near the worker are prone to deformation, which in turn leads to misalignment of the butting seams.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A welding device for large storage tank roof plates, including a support frame and a bearing device. The support frame is used to support several gore plates. The support frame includes a high support plate near the center and a low support plate located on the periphery. The bearing device includes a column located at the center and an annular rail located outside the low support plate. A bearing plate is arranged between the column and the annular rail. The bottom surface of the bearing plate has an arc surface parallel to the arc of the gore plates. There is a gap between the bearing plate and the gore plates. One end of the bearing plate is connected to a connecting column, and the connecting column is connected to the column. The other end of the bearing plate is connected to a driving component, and the driving component is in rolling connection with the annular rail.

[0006] Preferably, the upper surface of the bearing plate has protrusions.

[0007] Preferably, the bearing plate has a side surface parallel to the butting seam surface of the gore plates.

[0008] Preferably, the driving component includes a driving block moving along an annular rail, a driving motor is fixed on the driving block, a driving gear is fixed on the driving motor, a toothed ring is fixed on the lower side of the annular rail, and the driving gear meshes with the toothed ring.

[0009] Preferably, a guide wheel is rotatably connected to the driving block, and the guide wheel is in rolling connection with the annular rail.

[0010] Preferably, one end of the bearing plate has a rotating shaft, a reversing gear is fixed on the rotating shaft, a rack is fixedly connected to the driving block, the rack meshes with the reversing gear, a reversing motor is fixed on the driving block, and an output end of the reversing motor is fixedly connected with a screw rod, and the screw rod is in threaded connection with the rack.

[0011] Preferably, an arc-shaped inserting post is fixed on the lower surface of the connecting column, a turntable is rotatably connected inside the column, and an arc-shaped circular groove into which the arc-shaped inserting post is inserted is formed on the turntable.

[0012] Preferably, a rolling device is arranged on one side of the bearing plate. The rolling device includes an arc-shaped frame, an arc-shaped toothed plate is arranged on the arc-shaped frame, an arc-shaped groove is formed on the arc-shaped frame, an arc-shaped block is arranged in the arc-shaped groove, a rolling gear is rotatably connected to the arc-shaped block, a rolling motor is connected to a shaft rod of the rolling gear, an electric cylinder I is fixed on the arc-shaped block, a fixing plate is fixed at an extending end of the electric cylinder I, and rollers are rotatably connected to two ends of the fixing plate.

[0013] Preferably, the fixing plate is an inverted U-shaped frame, and the rollers are located directly above the welding seam.

[0014] Preferably, an electric cylinder II is arranged on one side of the electric cylinder I, and a grinding machine is fixed at an extending end of the electric cylinder II. A grinding disc of the grinding machine is located directly above the butting seam.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The standing load of workers is transferred to an independent bearing plate, avoiding the direct action of gravity on the butting seam of the melon skin plate. A gap is reserved between the bearing plate and the melon skin plate, and the bottom arc surface fits the radian of the melon skin plate. While maintaining the convenience of close-range welding operation, the problem of offset and deformation of the butting seam caused by human load is completely eliminated, fundamentally ensuring the initial welding positioning accuracy and avoiding defects such as uneven weld width and excessive misalignment caused by deformation. The parallel side surfaces of the bearing plate make the distance between it and the butting seam constant. Workers can maintain a unified operation posture and welding angle during the welding process, reducing operation fluctuations caused by position changes; the rollers are driven by the electric cylinder I to press the butting seam, so that the butting seam does not misalign and the welding consistency is maintained. The combination of the second electric cylinder and the grinding machine realizes the automatic preprocessing of the weld seam. The dust, rust and other impurities on the surface of the butt joint seam are removed by the grinding disc, providing a clean base material surface for welding and reducing defects such as slag inclusions and lack of fusion in the weld seam caused by impurity residues. This function works in coordination with the rolling device to form a process of "grinding - positioning - welding - compaction", greatly improving the standardization and reliability of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the gap between the bearing plate and the melon skin plate of the present invention.

[0019] Figure 3 It is a schematic diagram of the support frame of the present invention.

[0020] Figure 4 It is a schematic diagram of the driving component of the present invention.

[0021] Figure 5 It is a schematic diagram of the turning motor of the present invention.

[0022] Figure 6 It is a schematic diagram of the arc-shaped insert post and the turntable of the present invention.

[0023] Figure 7 It is a schematic diagram of the rolling device of the present invention.

[0024] Figure 8 It is a schematic diagram of the fixed plate and the roller of the present invention.

[0025] Figure 9 It is a schematic diagram of the arc-shaped tooth plate and the rolling gear of the present invention.

[0026] Description of drawing numbers: 1. Support frame; 2. Loading device; 21. Column; 22. Ring rail; 23. Loading plate; 231. Rotating shaft; 24. Connecting column; 25. Driving component; 251. Driving block; 252. Guide wheel; 253. Driving motor; 254. Driving gear; 255. Tooth ring; 256. Tipping gear; 257. Rack; 258. Tipping motor; 259. Screw; 26. Arc-shaped plug post; 27. Turntable; 28. Arc-shaped circular groove; 3. Rolling device; 31. Arc-shaped frame; 311. Arc-shaped groove; 32. Arc-shaped tooth plate; 33. Battery; 34. Arc-shaped block; 341. Limiting plate; 35. Rolling gear; 36. Rolling motor; 37. Electric cylinder I; 38. Fixed plate; 39. Roller; 4. Electric cylinder II; 5. Grinding machine. Detailed implementation mode

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be used in other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position relationship shown in the drawings. It is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0030] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0031] Please refer to Figures 1-9 , a welding device for the top plate of a large storage tank, including a support frame 1 and a loading device 2. The support frame 1 is used to support several segmental plates. The support frame 1 includes a high support plate near the center and a low support plate located on the periphery; the support frame 1 is prior art and will not be described in detail.

[0032] The carrier device 2 includes a central column 21 and an annular rail 22 located on the periphery of the lower support plate. A carrier plate 23 is arranged between the column 21 and the annular rail 22. The bottom surface of the carrier plate 23 has an arc surface parallel to the radian of the melon skin plate, reducing the distance between the carrier plate 23 and the melon skin plate, which is convenient for welding. There is a gap between the carrier plate 23 and the melon skin plate to prevent the carrier plate 23 from contacting the melon skin plate. The upper surface of the carrier plate 23 has protrusions, which help to increase the stability of personnel standing. One end of the carrier plate 23 is connected with a connecting column 24. The carrier plate 23 is rotatably connected with the connecting column 24, and the connecting column 24 is connected with the column 21. The column 21 supports the connecting column 24, making the carrier plate 23 more stable. The other end of the carrier plate 23 is connected with a driving component 25, and the driving component 25 is in rolling connection with the annular rail 22.

[0033] The carrier plate 23 has a side surface parallel to the docking seam surface of the melon skin plate. The parallel side surface keeps the distance between the carrier plate 23 and the docking seam the same. It is convenient for workers to move and also enables workers to maintain the same state for welding, which is beneficial to the stability of welding.

[0034] The driving component 25 includes a driving block 251 moving along the annular rail 22. A guide wheel 252 is rotatably connected to the driving block 251, and the guide wheel 252 is in rolling connection with the annular rail 22. There are guide wheels 252 on both the inner and outer sides of the annular rail 22. The rolling of the guide wheels 252 drives the driving block 251 to move along the annular rail 22. This is the prior art. A driving motor 253 is fixed on the driving block 251, and a driving gear 254 is fixed on the driving motor 253. A tooth ring 255 is fixed on the lower side of the annular rail 22, and the driving gear 254 meshes with the tooth ring 255.

[0035] One end of the carrier plate 23 has a rotating shaft 231. This end of the carrier plate 23 has a horizontal section, which is located on the driving block 251. The driving block 251 supports the horizontal section. A reversing gear 256 is fixed on the rotating shaft 231. A rack 257 is fixedly connected to the driving block 251. The rack 257 meshes with the reversing gear 256. There are also two racks 257, which are located below the reversing gear 256. The two racks 257 are connected as a whole. The lower side of the rack 257 has a T-shaped slider, and there is a T-shaped chute on the driving block 251. The cooperation of the T-shaped slider and the T-shaped chute enables the linear movement of the rack 257. A reversing motor 258 is fixed on the driving block 251, and a battery pack is fixed on the driving block 251 (not shown in the figure). The output end of the reversing motor 258 is fixedly connected with a screw rod 259. The end far from the reversing motor 258 is rotatably connected to the driving block 251. The screw rod 259 is threadedly connected with the rack 257. The rotation of the screw rod 259 makes the two racks 257 move together. When removing the tank top, the carrier plate 23 rotates upward around the rotating shaft 231. The screw rod 259 and the motor keep the rack 257 stable, thereby keeping the carrier plate 23 stable. Then the tank top plate is lifted out.

[0036] An arc-shaped insertion post 26 is fixed to the lower surface of the connecting post 24. A turntable 27 is rotatably connected inside the upright post 21. An arc-shaped circular groove 28 into which the arc-shaped insertion post 26 is inserted is provided on the turntable 27. There is friction between the turntable 27 and the upright post 21, so that after the arc-shaped insertion post 26 is separated from the arc-shaped circular groove 28, the turntable 27 remains stable, facilitating the subsequent insertion of the arc-shaped insertion post 26. When the connecting post 24 rotates downward, the arc-shaped insertion post 26 is inserted into the arc-shaped circular groove 28. When the bearing plate 23 rotates, the arc-shaped insertion post 26 drives the turntable 27 to rotate.

[0037] Further, in order to cope with the stress change of the melon skin plate itself, a rolling device 3 is provided on one side of the bearing plate 23. The rolling device 3 includes an arc-shaped frame 31. The radian of the arc-shaped frame 31 is the same as that of the melon skin plate. When viewed from above, the docking seam is located between the arc-shaped frame 31 and the bearing plate 23. The upper end of the arc-shaped frame 31 is fixed to the connecting post 24, and the lower end of the arc-shaped frame 31 is fixed to the driving block 251. There is a support plate on the driving block 251 to support the lower end of the arc-shaped frame 31. An arc-shaped toothed plate 32 is provided on the arc-shaped frame 31. An arc-shaped groove 311 is provided in the arc-shaped frame 31. Two arc-shaped blocks 34 are provided in the arc-shaped groove 311. A rolling gear 35 is rotatably connected to the arc-shaped blocks 34. The rolling gear 35 is located between the two arc-shaped blocks 34. The shaft of the rolling gear 35 is rotatably connected to the arc-shaped blocks 34. A rolling motor 36 is connected to the shaft of the rolling gear 35. The shaft extends out of the arc-shaped block 34 and is connected to the rolling motor 36. The rolling motor 36 is fixed to the extension plate of the arc-shaped block 34. Limiting plates 341 are provided on the outer sides of the two arc-shaped blocks 34. The arc-shaped blocks 34 are fixedly connected to the limiting plates 341. The limiting plates 341 are in contact with the side surfaces of the arc-shaped frame 31. The limiting plates 341 enable the arc-shaped blocks 34 to slide stably. A battery 33 is fixed to the upper end of the limiting plate 341. The battery 33 supplies power to the rolling motor 36, the first electric cylinder 37, and the second electric cylinder 4. The limiting plate 341 has buttons for turning on the rolling motor 36, the first electric cylinder 37, and the second electric cylinder 4. The buttons are not shown. A first electric cylinder 37 is fixed to the arc-shaped block 34. A fixing plate 38 is fixed to the extending end of the first electric cylinder 37. Rollers 39 are rotatably connected to both ends of the fixing plate 38. The first electric cylinder 37 and the rolling motor 36 are respectively located on both sides of the arc-shaped frame 31.

[0038] The fixing plate 38 is in the shape of an inverted U-shaped frame. The rollers 39 are located directly above the welding seam. The middle space of the inverted U-shaped frame is for welding. The two rollers 39 are respectively located in the front and rear positions of the welding, so that the welded docking seam has no edge misalignment.

[0039] Further, an electric cylinder two 4 is arranged on one side of the electric cylinder one 37, and a grinding machine 5 is fixed to the extending end of the electric cylinder two 4. The grinding machine 5 is a prior art, and its structure and working principle will not be introduced in detail. The grinding disc of the grinding machine 5 is located directly above the butt joint. The dust and rust at the weld are removed by grinding with the grinding machine 5. After grinding, it can be manually cleaned again before welding. It should be noted that the carrier plate 23 rotates counterclockwise by itself, and the melon skin plates are spliced counterclockwise.

[0040] During use, first extend the electric cylinder two 4 to lower the grinding machine 5 so that the grinding disc contacts the butt joint. Then start the grinding machine 5, and then start the rolling motor 36. The rolling motor 36 makes the rolling gear 35 rotate. The rolling gear 35 rolls on the arc-shaped tooth plate 32, and the rolling gear 35 drives the arc-shaped block 34 to move in the arc-shaped groove 311. During the movement of the arc-shaped block 34, the grinding machine 5 completes the grinding of the butt joint. After grinding, turn off the grinding machine 5 and reset the grinding machine 5 by starting the electric cylinder two 4. Taking the welding from top to bottom as an example, extend the electric cylinder one 37 to move the fixing plate 38 so that the roller 39 contacts the butt joint. When welding the uppermost end of the butt joint, the upper roller 39 does not contact the butt joint, and the lower roller 39 presses on the butt joint. After a small section at the upper end is welded, start the rolling motor 36 to move the arc-shaped block 34. The arc-shaped block 34 drives the electric cylinder one 37 to move, the electric cylinder one 37 drives the fixing plate 38 to move, and the fixing plate 38 drives the two rollers 39 to move together. At this time, both rollers 39 press on the butt joint. When the upper roller 39 contacts the end of the butt joint, turn off the rolling motor 36. At this time, a new butt joint is exposed, and continue welding. Repeat the above operations. Each time a new butt joint is exposed, turn off the rolling motor 36 and perform welding until all welding is completed, and then reset the fixing plate 38.

[0041] After the new melon skin plates are butted, start the driving motor 253. The driving motor 253 makes the driving gear 254 rotate. The driving gear 254 rolls on the toothed ring 255 until it rotates by an angle of one melon skin plate. When the roller 39 is directly above the butt joint, turn off the driving motor 253. If the roller 39 crosses the butt joint, the motor needs to rotate in reverse to adjust the position. When the welding of the tank top plate is completed, the turning motor 258 makes the screw 259 rotate. The screw 259 makes the rack 257 move, thereby making the turning gear 256 rotate. The turning gear 256 makes the rotating shaft 231 rotate. The rotating shaft 231 drives the carrier plate 23 to rotate upward, and then the welded tank top plate is lifted out.

[0042] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and without departing from the said principles, the embodiments of the present invention may have any deformation or modification.

Claims

1. A welding device for the tank roof of a large storage tank, characterized in that Comprising: A support frame (1) for supporting a plurality of melon skin plates, the support frame (1) including a high support plate near the center and a low support plate located at the periphery; A carrying device (2), which includes a column (21) located at the center and an annular rail (22) located at the periphery of the low support plate. A carrying plate (23) is provided between the column (21) and the annular rail (22). The bottom surface of the carrying plate (23) has an arc surface parallel to the radian of the melon skin plate. There is a gap between the carrying plate (23) and the melon skin plate. One end of the carrying plate (23) is connected with a connecting column (24), the connecting column (24) is connected with the column (21), the other end of the carrying plate (23) is connected with a driving component (25), and the driving component (25) is in rolling connection with the annular rail (22).

2. The welding device for the tank roof of a large storage tank according to claim 1, wherein: The upper surface of the carrying plate (23) has protrusions.

3. The welding device for the tank roof of a large storage tank according to claim 1, characterized in that: The carrying plate (23) has a side surface parallel to the butt joint surface of the melon skin plate.

4. The welding device for the tank roof of a large storage tank according to claim 1, wherein: The driving component (25) includes a driving block (251) moving along the annular rail (22). A driving motor (253) is fixed on the driving block (251), a driving gear (254) is fixed on the driving motor (253), a toothed ring (255) is fixed on the lower side of the annular rail (22), and the driving gear (254) is meshed with the toothed ring (255).

5. The welding device for the tank roof of a large storage tank according to claim 4, characterized in that: A guide wheel (252) is rotatably connected to the driving block (251), and the guide wheel (252) is in rolling connection with the annular rail (22).

6. The welding device for the top plate of a large storage tank according to claim 4, characterized in that: One end of the carrying plate (23) has a rotating shaft (231), a flipping gear (256) is fixed on the rotating shaft (231), a rack (257) is fixedly connected to the driving block (251), the rack (257) is meshed with the flipping gear (256), a flipping motor (258) is fixed on the driving block (251), and an output end of the flipping motor (258) is fixedly connected with a screw rod (259), and the screw rod (259) is in threaded connection with the rack (257).

7. A welding device for the top plate of a large storage tank according to claim 1, characterized in that: An arc-shaped inserting post (26) is fixed on the lower surface of the connecting column (24). A turntable (27) is rotatably connected inside the column (21), and an arc-shaped circular groove (28) into which the arc-shaped inserting post (26) is inserted is provided on the turntable (27).

8. The welding device for the tank roof of a large storage tank according to claim 1, wherein: A rolling device (3) is arranged on one side of the carrying plate (23). The rolling device (3) includes an arc-shaped frame (31), an arc-shaped toothed plate (32) is arranged on the arc-shaped frame (31), an arc-shaped groove (311) is provided on the arc-shaped frame (31), an arc-shaped block (34) is arranged in the arc-shaped groove (311), a rolling gear (35) is rotatably connected to the arc-shaped block (34), a rolling motor (36) is connected to a shaft rod of the rolling gear (35), an electric cylinder one (37) is fixed on the arc-shaped block (34), an extending end of the electric cylinder one (37) is fixed with a fixing plate (38), and rollers (39) are rotatably connected to both ends of the fixing plate (38).

9. The welding device for the tank roof of a large storage tank according to claim 8, characterized in that: The fixing plate (38) is in the shape of an inverted U-shaped frame, and the rollers (39) are located directly above the welding seam.

10. The welding device for the tank roof of a large storage tank according to claim 8, characterized in that: On one side of the first electric cylinder (37), a second electric cylinder (4) is provided, and a grinding machine (5) is fixed to the extending end of the second electric cylinder (4). The grinding disc of the grinding machine (5) is located directly above the docking seam.

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