A wall plate welding device and welding method for large storage tank

Abstract

The present application relates to a wall panel welding device and a welding method for a large storage tank, and in particular to the field of welding and installation of annular wall panels of large storage tanks. The device includes a base, an annular track, a ring frame, multiple internal welding mechanisms, multiple vertical frames, multiple clamping devices, multiple lifting frames, and multiple external welding mechanisms. The annular track supports the bottom of the wall panel, the ring frame abuts against the inner peripheral wall of the wall panel, the internal welding mechanism welds the inner side of the wall panel, the vertical frame is arranged around the annular track and forms a feeding channel, the clamping device clamps the outer side of the wall panel, and the lifting frame drives the external welding mechanism to weld the outer peripheral wall of the wall panel. The present application also provides a wall panel welding method for a large storage tank using the device. Through the above-mentioned device and method, efficient and accurate installation and welding of the entire annular wall panel of a large storage tank are achieved, which improves work efficiency and reduces installation costs.

Description

Technical Field

[0001] The present application relates to a wall panel welding device and a welding method for a large storage tank, and belongs to the field of welding and installation of full-ring wall panels for large storage tanks. Background Art

[0002] In the construction process of large storage tanks, the selection and implementation of installation technology has a vital impact on the quality, safety and work efficiency of the tanks. With the continuous advancement of industrial technology, the installation methods of large storage tanks are also continuously developing and optimizing. At present, the main installation processes used in the industry include the upright installation method and the inverted installation method, each of which has its own characteristics and application scenarios.

[0003] The upright installation method is a traditional method for installing storage tanks. It installs the wall panels layer by layer from bottom to top. This method is mature, but it involves many aerial operations and has high requirements for construction equipment and safety measures. In contrast, the inverted installation method is a more commonly used installation process. It uses a hydraulic lifting system to lift and install the wall panels layer by layer, effectively reducing aerial operations and improving construction safety. At the same time, the inverted installation method is also conducive to improving construction quality and work efficiency, so it has been widely used in storage tank construction.

[0004] However, the inverted installation method also faces some technical challenges during its implementation, such as the stability of the hydraulic lifting system and the control of construction accuracy. The hydraulic system may be unstable during the lifting process due to factors such as hydraulic oil leakage and system pressure fluctuations, thus affecting the construction quality and safety. In addition, due to the complex construction site environment and equipment errors, the control of parameters such as the installation position, verticality, and roundness of each layer of wall panels during the inverted installation method also faces certain challenges. If these problems are not handled properly, they may cause deviations in the geometric size and shape of the storage tank, thereby affecting its performance.

[0005] In summary, the existing large storage tank installation process still faces great technical challenges in terms of stability and installation accuracy control during the wall panel welding process. Summary of the invention

[0006] In order to solve the problems in the background technology, the present application provides a wall plate welding device and a welding method for a large storage tank.

[0007] The present application provides a wall plate welding device for a large storage tank, which adopts the following technical solution:

[0008] A wall panel welding device for a large storage tank comprises a base, which is horizontally arranged; an annular track, which is horizontally rotatably arranged on the base and is used to support the bottom of the wall panel; a ring frame, which is located on the inner side of the annular track, and the outer peripheral wall of the ring frame is used to abut against the inner peripheral wall of the wall panel; a plurality of internal welding mechanisms, which are vertically movable and arranged on the ring frame, and are used to weld the inner side joint seams of the wall panel; a plurality of vertical frames, which are centrally symmetrically arranged around the annular track and fixed to the base, and a feeding channel is formed between adjacent vertical frames, and is used to convey semi-annular wall panels; a plurality of clamping devices, which are vertically rotatably arranged on each vertical frame, and the clamping devices located on the plurality of vertical frames cooperate with each other to clamp and enclose the outer side of the whole annular wall panel; a plurality of lifting frames, which are vertically lifted and arranged on the base and are located between adjacent vertical frames, and the lifting of the lifting frames can be lower than the upper side of the annular track or protrude from the upper side of the annular track; a plurality of external welding mechanisms, which are respectively arranged on each lifting frame, and are used to weld the outer side joint seams of the wall panel.

[0009] By adopting the above technical scheme, the device can support the entire annular wall panel through the setting of the annular track, and at the same time clamp the outer side of the entire annular wall panel through multiple clamping devices arranged in a ring, cooperate with the lifting frame and the external welding mechanism to achieve welding of the outer side of the entire annular wall panel, and the internal welding mechanism to achieve welding of the inner side of the entire annular wall panel, thereby improving the installation and welding efficiency of the entire annular wall panel of large storage tanks.

[0010] Preferably, the ring frame is arranged in a ring track for vertical movement.

[0011] Preferably, it also includes a gear ring coaxially fixed to the lower side of the annular track; a driving gear rotatably arranged on the base and meshing with the gear ring; and a first driving member fixed to the base for driving the driving gear to rotate.

[0012] By adopting the above technical solution, the arrangement of the ring gear, the driving gear and the first driving member can realize the automatic driving of the annular track, thereby improving the working efficiency.

[0013] Preferably, the inner welding mechanism comprises a first welding machine vertically slidably arranged on a ring frame; and a push cylinder fixed to the ring frame and used for pushing the first welding machine up and down.

[0014] By adopting the above technical solution, the setting of the push cylinder can realize the automatic lifting and lowering of the first welding machine, thereby improving the automation level of welding.

[0015] Preferably, it also includes an annular groove vertically formed on the stand; a chain ring rotatably disposed in the annular groove; a sprocket rotatably disposed on the stand and engaged with the chain ring, and the clamping device is fixed to the chain ring.

[0016] By adopting the above technical solution, the arrangement of the above structure can realize the circular movement of the clamping device, thereby improving the adjustment convenience of the clamping device.

[0017] Preferably, it also includes a stepping motor fixed to the stand for driving the sprocket to rotate.

[0018] By adopting the above technical solution, the setting of the stepper motor can realize automatic and precise driving of the sprocket rotation.

[0019] Preferably, the clamping device comprises a clamping cylinder fixed to the chain ring; a clamping plate fixed to the telescopic shaft of the clamping cylinder, and the clamping surface of the clamping plate can be adapted to the outer peripheral wall of the wall panel.

[0020] By adopting the above technical solution, the clamping device can clamp and fix the outer side of the wall panel through the arrangement of the clamping cylinder and the clamping plate.

[0021] Preferably, a contact roller is provided on one side of the clamping plate that contacts the wall plate and is rotatably arranged vertically.

[0022] By adopting the above technical solution, the setting of the abutment roller can reduce the friction between the clamping device and the wall panel, thereby improving the smoothness of the movement of the clamping device.

[0023] The second aspect of the present application provides a wall plate welding method for a large storage tank, which adopts the following technical solution:

[0024] A wall plate welding method for a large storage tank, using a wall plate welding device for a large storage tank, includes the following steps: A wall plate welding method for a large storage tank, using a wall plate welding device for a large storage tank, includes the following steps:

[0025] S1, taking a plurality of unjoined semi-annular wall panels and pushing them to the upper side of the annular track through the feeding channel, so that the inner sides of the semi-annular wall panels are against the ring frame, and the wall panels are joined into a complete ring shape;

[0026] S2, the lower clamping devices of each stand are actuated to clamp each semi-annular wall panel;

[0027] S3, the annular track rotates to drive the entire annular wall panel to rotate until the joint seams of each semi-annular wall panel are located at the feeding channel;

[0028] S4, the lifting frame rises, driving the outer welding mechanism to move vertically to weld the outer sides of the vertical joint seams of the adjacent semi-annular wall panels, and at the same time, the inner welding mechanism moves vertically to weld the inner sides of the vertical joint seams of the adjacent semi-annular wall panels;

[0029] S5, the lower clamping device moves upward, driving the wall panel welded into a whole ring to move upward at the same time, leaving space for the height of the next wall panel;

[0030] S6, repeat S1-S4 to complete the welding of the lower half ring;

[0031] S7, the annular track rotates to drive the two welded wall panels to rotate in situ, and at the same time, the annular welds between the vertically arranged full annular wall panels are welded by the inner welding mechanism and the outer welding mechanism;

[0032] S8, repeat S5-S7 to complete the welding of all the wall panels of the tank.

[0033] By adopting the above scheme and the above installation method, efficient installation and welding of the entire annular wall panel of a large storage tank can be achieved, thereby improving work efficiency and reducing installation costs.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. Through the arrangement of annular tracks, annular frames, internal welding mechanisms, multiple stands, multiple clamping devices, multiple lifting frames and external welding mechanisms, efficient support, fixation and welding of the entire annular wall panels of large storage tanks are achieved, thereby improving installation efficiency.

[0036] 2. Through the setting of the base frame, the vertical lifting of the ring frame is realized, which is convenient for adjusting the height of the entire ring wall panel and facilitating the welding operation and the stacking of the wall panels.

[0037] 3. Through the setting of gear ring, driving gear and servo motor, the automatic drive of the circular track is realized, which improves the work efficiency and automation level.

[0038] 4. The clamping device realizes stable clamping of the outer side of the wall panel through the setting of the clamping cylinder, the clamping plate and the contact roller, while reducing the friction and improving the movement smoothness of the clamping device.

[0039] 5. A wall panel welding method for a large storage tank realizes efficient and accurate welding of the entire annular wall panel through precise step arrangement, reduces installation costs, and improves overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of a wall plate welding device for a large storage tank;

[0041] Figure 2 It is a schematic diagram of a circular orbit;

[0042] Figure 3 It is a schematic diagram of the ring frame structure;

[0043] Figure 4 It is a schematic diagram of the internal welding mechanism;

[0044] Figure 5 It is an exploded schematic diagram of the frame structure;

[0045] Figure 6 is a schematic diagram of the clamping device;

[0046] Figure 7 It is a schematic diagram of the external welding mechanism;

[0047] Figure 8 It is a schematic diagram of the tank wall panel installation structure.

[0048] Description of reference numerals: 1. base;

[0049] 2. Annular track; 21. Ring gear; 22. Driving gear; 23. Servo motor;

[0050] 3. Ring stand; 31. Lifting cylinder;

[0051] 4. Internal welding mechanism; 41. First welding machine; 42. Push cylinder;

[0052] 5. Stand; 51. Stand plate; 52. Annular groove; 53. Chain ring; 54. Sprocket; 55. Stepper motor; 56. Vertical support plate;

[0053] 6. Clamping device; 61. Clamping cylinder; 62. Clamping plate; 63. Contact roller;

[0054] 7. Lifting frame; 71. Lifting cylinder;

[0055] 8. External welding mechanism;

[0056] 9. Feeding channel. DETAILED DESCRIPTION

[0057] The present application is described in further detail below.

[0058] A first aspect of the present application provides a wall panel welding device for a large storage tank.

[0059] Example 1

[0060] A wall plate welding device for large storage tanks, combined with Figures 1 to 8 As shown, the device mainly includes a base 1, an annular track 2, a ring frame 3, a plurality of internal welding mechanisms 4, a plurality of vertical frames 5, a plurality of clamping devices 6, a plurality of lifting frames 7 and a plurality of external welding mechanisms 8.

[0061] Reference Figure 1 The base 1 is horizontally arranged as the basic supporting structure of the whole device, and can be horizontally fixed on a basic surface, such as the ground. The annular track 2 is horizontally rotatably arranged on the base 1, and the upper side of the annular track 2 is flush with the upper side of the base 1. It is used to support the bottom of the wall panel to achieve support for the entire annular wall panel.

[0062] Specifically, the outer wall of the annular track 2 can be formed with a convex ring, and the base 1 is provided with a circular groove with the same outer diameter as the annular track 2 at the position corresponding to the annular track 2, so that the annular track 2 can be installed in the circular groove. At the same time, the groove wall of the circular groove can be provided with an annular groove for cooperating with the convex ring of the outer wall of the annular track 2. For example, the convex ring and the groove can both have a rectangular cross-section, so that the convex ring and the groove can achieve "convex-concave" adaptation (this is the prior art, not shown in the figure), which not only limits the relative position of the annular track 2 and the base 1, but also enables the annular track 2 to rotate in situ relative to the base 1.

[0063] Reference Figure 2 Specifically, a gear ring 21 is coaxially fixed on the lower side of the annular track 2, and a driving gear 22 is rotatably provided on the lower side of the base 1. The driving gear 22 meshes with the gear ring 21. A servo motor 23 is also provided on the lower side of the driving gear 22. The servo motor 23 can be directly fixed in the base surface to limit the movement of the servo motor 23, and the output shaft of the servo motor 23 is fixed to the driving gear 22. That is, the output shaft of the servo motor 23 rotates, driving the driving gear 22 to rotate, and the annular track 2 can be driven to rotate through the gear ring 21, so as to drive the entire annular wall panel carried by it to rotate synchronously.

[0064] Reference Figure 3 The ring frame 3 is located inside the annular track 2, is coaxially arranged with the annular track 2, and moves vertically and rotates relative to the annular track 2. The outer peripheral wall of the ring frame 3 is used to abut against the inner peripheral wall of the wall panel to assist in supporting the wall panel.

[0065] Specifically, a plurality of lifting cylinders 31 are vertically arranged on the lower side of the ring frame 3. The plurality of lifting cylinders 31 can be pre-buried in the foundation surface below the ring frame 3. The telescopic shafts of the plurality of lifting cylinders 31 are vertically arranged and fixed on the lower side of the ring frame 3. That is, the telescopic shafts of the plurality of lifting cylinders 31 are synchronously extended and retracted, which can drive the ring frame 3 to move vertically relative to the annular track 2.

[0066] Reference Figure 4 , multiple internal welding mechanisms 4 are vertically movably arranged on the ring frame 3, and are used to perform welding operations on the inner welding seams of the wall panels. Specifically, the internal welding mechanism 4 includes a first welding machine 41 and a push cylinder 42. The first welding machine 41 is vertically slidably connected to the ring frame 3 for welding operations. The push cylinder 42 is fixed to the ring frame 3 and connected to the first welding machine 41. The push cylinder 42 drives the telescopic shaft to extend or contract to push the first welding machine 41 to perform lifting and lowering movements, so as to achieve the inner welding operation of the tank wall panel.

[0067] Reference Figure 5, a plurality of uprights 5 are arranged around the circular track 2 in a centrally symmetrical manner and fixed on the base 1. A feeding channel 9 is formed between adjacent uprights 5 for conveying the semi-circular wall panels, that is, if there are several feeding channels 9, several semi-circular wall panels can be conveyed. During the conveying process, the semi-circular wall panels can be conveyed to the upper side of the circular track 2 through the feeding channel by utilizing the certain deformation capacity of the semi-circular wall panels themselves or by adopting an inclined conveying method.

[0068] A plurality of clamping devices 6 are arranged on each stand 5 in a vertical circular rotational manner. The clamping devices 6 located on the plurality of stands 5 cooperate with each other to clamp and enclose the outer side of the entire annular wall panel, thereby clamping and fixing the outer side of the entire annular wall panel.

[0069] Specifically, each stand 5 includes two parallel and symmetrically arranged vertical plates 51, and a walking space is formed between the two vertical plates 51 for realizing the installation and movement of the clamping device 6. An annular groove 52 is formed on the opposite sides of the two vertical plates 51. The annular groove 52 can be a rectangular groove or a waist-shaped groove. A chain ring 53 is installed in the annular groove 52. The chain ring 53 is adapted to the annular groove 52 and can rotate along the annular groove 52. A sprocket 54 is rotatably arranged at the inner side of the inflection point position of the two vertical plates 51 corresponding to the chain ring 53, so as to drive the chain ring 53 to rotate along the annular groove 52. A stepper motor 55 is also fixed on the opposite side of the two vertical plates 51. The output shaft of the stepper motor 55 is fixed to a sprocket 54 of the corresponding side vertical plate 51, and is used to drive the sprocket 54 to rotate, so as to realize the synchronous rotation of the two chain rings 53 on the same stand 5.

[0070] The number of clamping devices 6 on each stand 5 is set to be no less than the number of layers of the full annular wall plate of the storage tank to be welded, and a clamping plate 62 is fixed to the front end of the telescopic shaft of the clamping cylinder 61, and the clamping surface of the clamping plate 62 is set to be an arc surface adapted to the tank wall plate. In addition, the clamping surface of the clamping plate 62 can also be provided with a plurality of abutment rollers 63 (refer to Figure 6 ), and when multiple contact rollers 63 contact the wall panel, the axial direction of the contact roller 63 should be kept the same as the axial direction of the wall panel to ensure that the clamped wall panel can rotate along its own axis without sliding down in the vertical direction.

[0071] Each clamping cylinder 61 is fixed to the opposite side of the chain ring 53 of the two vertical plates 51, that is, the two chain rings 53 rotate synchronously, which can drive the clamping cylinder 61 to rotate synchronously along the annular groove 52. In addition, the spacing between adjacent clamping cylinders 61 should be kept the same as the spacing between two full annular wall panels in the vertical direction, so as to ensure that each clamping device 6 can clamp a layer of tank wall panel as the chain ring 53 rotates.

[0072] In order to improve the supporting strength of the clamping cylinder 61, a vertical support plate 56 is fixed between the two corresponding vertical plates 51 of the vertical frame 5. The vertical support plate 56 can contact the rear end of the clamping cylinder 61 in the clamping operation state to provide sufficient supporting force for the clamping cylinder 61 when clamping the wall panel. In order to facilitate the relative vertical movement of the clamping cylinder 61 and the vertical support plate 56, in other embodiments of the present application, a contact wheel (shown in the figure) can also be provided at the tail end of the clamping cylinder 61, which is used to contact the vertical support plate 56 and facilitate the movement of the clamping cylinder 61.

[0073] Reference Figure 7 , multiple lifting frames 7 are vertically lifted and arranged on the base 1, located between adjacent vertical frames 5, that is, a lifting cylinder 71 is arranged on the lower side of the lifting frame 7, the lifting cylinder 71 is vertically arranged and pre-buried in the foundation surface, and the telescopic axis of the lifting cylinder 71 faces upward and is fixed to the lifting frame 7. Multiple external welding mechanisms 8 are respectively fixed on each lifting frame 7, and the external welding mechanism 8 adopts a second welding machine, and the second welding machine can also adopt different automatic welding equipment according to the welding requirements. And the position of the external welding mechanism 8 is set corresponding to the position of the internal welding mechanism 4, so that the external welding mechanism 8 and the internal welding mechanism 4 can weld the inner and outer sides of the joint seam of the tank wall panel at the same time. During operation, the lifting cylinder 71 drives the lifting movement of the lifting frame 7, which can make the external welding mechanism 8 lower than the upper side of the circular track 2 or protrude from the upper side of the circular track 2 to meet the welding requirements of different heights, and is used for welding operations on the outer peripheral wall of the wall panel.

[0074] Reference Figure 8 The implementation principle of a wall plate welding device for a large storage tank in this embodiment is as follows:

[0075] During the welding operation of the tank wall panels, first, the lifting frame 7 drives each external welding mechanism 8 to descend, so that the upper side of the external welding mechanism 8 is lower than the upper side of the base 1, leaving the feeding channel 9, and then the multiple semi-annular wall panels used for splicing the tank wall panels are sent to the upper side of the annular track 2 through the feeding channel 9, so that the inner peripheral walls of the multiple semi-annular wall panels are against the outer side wall of the ring frame 3. At this time, the multiple semi-annular wall panels will also be surrounded to form a whole ring, that is, a layer of wall panels for constructing the tank. Then, through the clamps at the corresponding positions on the multiple vertical frames 5, The holding devices 6 rotate to the same height, that is, the position of the multiple semi-annular wall panels located above the circular track 2 at this time, and the outer sides of each semi-annular wall panel are pre-clamped by multiple clamping devices 6, that is, providing supporting force instead of clamping the multiple wall panels. In this state, the circular track 2 is rotated to drive the multiple semi-annular wall panels located above the circular track 2 to rotate at the same time, so that the vertical joints of adjacent semi-annular wall panels are moved between adjacent frames 5, that is, corresponding to the positions of the inner welding mechanism 4 and the outer welding mechanism 8.

[0076] Then, the lifting cylinder 71 pushes the lifting frame 7 to rise, driving the external welding mechanism 8 to rise, so that the outer sides of the vertical joints of the adjacent semi-annular wall panels can be welded. At the same time, the internal welding mechanism 4 on the inner side of the ring frame 3 moves vertically along the ring frame 3, so that the inner sides of the vertical joints of the adjacent semi-annular wall panels can be welded, thereby completing the welding and forming of a layer of the entire annular wall panel.

[0077] Then, the clamping devices 6 corresponding to the whole annular wall panels of this layer on the multiple vertical frames 5 act simultaneously to clamp and fix the wall panels of this layer. At the same time, the ring frame 3 moves vertically downward to disengage from the wall panels that have been welded. Then, the corresponding multiple clamping devices 6 move upward along the vertical frames 5 at the same time, so that the whole annular wall panels of this layer that have been welded can be lifted upward to leave space for the placement of the whole annular wall panels of the next layer. Then, the multiple semi-annular wall panels of the next layer are filled to the upper side of the annular track 2 in the same way to achieve the welding and fixation of the vertical joints. After the whole annular wall panels are formed, the upper and lower layers of the whole annular wall panels that have been spliced ​​are driven to rotate by the annular track 2 again, and the inner welding mechanism 4 can cooperate with the outer welding mechanism 8 to complete the welding of the annular joints of the upper and lower layers of annular wall panels. At this point, the two adjacent layers of whole annular wall panels in the vertical direction can be welded and fixed.

[0078] Then, the clamping devices corresponding to the upper and lower layers of the whole ring wall panels move upward at the same time, leaving another layer of the whole ring wall panel filling space, and continue to fill and weld the new whole ring wall panel. The above steps can be repeated many times to achieve the welding of the entire wall panel of the storage tank. Finally, the welded tank wall panel can be moved away from the welding device through lifting equipment such as a crane, and the top plate and bottom plate of the tank wall panel are welded to complete the welding of the entire storage tank.

[0079] Example 2

[0080] A wall panel welding device for a large storage tank, which differs from Example 1 in that, in other embodiments of the present application, in order to facilitate the removal of the tank wall panels, the stand 5 can also be configured to be able to slide radially along the annular track 2 and be arranged on the base 1, and a slide rail is used in conjunction with components such as a screw transmission mechanism, or a driving member such as a horizontal drive cylinder is directly used to directly drive the stand 5 to move (this is the prior art, not shown in the figure), thereby making room for removing the tank wall panels after welding is completed, so as to facilitate the removal of the tank wall panels after welding is completed.

[0081] The second aspect of the present application provides a wall plate welding method for a large storage tank, which is described in detail below:

[0082] A wall plate welding method for a large storage tank mainly comprises the following steps:

[0083] S1: Take a plurality of unjoined semi-annular wall panels and push them to the upper side of the annular track 2 through the feeding channel 9 respectively, so that the inner sides of the semi-annular wall panels are against the ring frame 3, and the semi-annular wall panels are joined to form a complete annular wall panel.

[0084] S2: The lower clamping devices 6 of each stand 5 are activated to clamp each semi-annular wall panel. In this step, the clamping devices 6 or other auxiliary equipment can be used to perform preliminary positioning of the wall panel.

[0085] S3: The annular track 2 rotates to drive the full annular wall panel to rotate until the joint seams of each semi-annular wall panel are located at the position of the feeding channel 9. By rotating the annular track 2, the joint seams to be welded are aligned with the welding position.

[0086] S4: The lifting frame 7 rises, driving the outer welding mechanism 8 to move vertically to weld the outer sides of the vertical joint seams of the adjacent semi-circular wall panels, and at the same time, the inner welding mechanism 4 moves vertically to weld the inner sides of the vertical joint seams of the adjacent semi-circular wall panels. The welding efficiency is improved by welding inside and outside at the same time.

[0087] S5: The lower clamping device 6 moves upward, driving the welded full ring wall panels to move upward at the same time, leaving space for the installation of the next layer of semi-ring wall panels. The stacking and space adjustment of the full ring wall panels are achieved through the lifting and lowering movement of the clamping device 6.

[0088] S6: Repeat steps S1 to S4 to complete the welding of the lower semi-annular wall panel. By adopting the above steps, the welding of two layers of full-annular wall panels in the vertical direction can be completed.

[0089] S7: The annular track 2 rotates, driving the two welded full annular wall panels to rotate in situ, and the annular welds between the vertically arranged full annular wall panels are welded by the inner welding mechanism 4 and the outer welding mechanism 8. In this step, the inner welding mechanism 4 and the outer welding mechanism 8 can be used simultaneously to weld the annular welds to ensure the quality and sealing of the welds.

[0090] S8: Repeat steps S5 to S7 to complete the welding of all the wall panels of the storage tank. By continuously looping the above steps, the welding work of all the wall panels required for the storage tank can be completed in sequence, and finally the wall panel installation of the entire storage tank is completed.

[0091] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wall plate welding method for a large storage tank, using a wall plate welding device for a large storage tank, characterized in that: The wall plate welding device of the large storage tank comprises: A base (1) is arranged horizontally; The annular track (2) is horizontally rotatably arranged on the base (1) and is used to support the bottom of the wall panel; A ring frame (3) is located inside the ring track (2), the outer peripheral wall of the ring frame (3) is used to abut against the inner peripheral wall of the wall plate, and the ring frame (3) is arranged in the ring track (2) for vertical movement; A plurality of internal welding mechanisms (4) are vertically movably arranged on the ring frame (3) and are used for welding the inner side joint seams of the wall panels; A plurality of vertical frames (5) are centrally symmetrically arranged around the annular track (2) and fixed to the base (1), and a feeding channel (9) is formed between adjacent vertical frames (5) for conveying the semi-annular wall panels, and further comprises: An annular groove (52) is vertically formed on the stand (5); A chain ring (53) is rotatably disposed in the annular groove (52); The sprocket (54) is rotatably mounted on the stand (5) and meshes with the chain ring (53). A plurality of clamping devices (6) are arranged on each stand (5) in a vertical circular rotational manner, the clamping devices (6) located on the plurality of stands (5) cooperate with each other to clamp and enclose the outer side of the wall plate in a full circular shape, and the clamping devices (6) are fixed to the chain ring (53); The clamping device (6) comprises: A clamping cylinder (61) fixed to the chain ring (53); A clamping plate (62) is fixed to the telescopic shaft of the clamping cylinder (61), the clamping surface of the clamping plate (62) being adapted to the outer peripheral wall of the wall plate, and a vertically rotatable side of the clamping plate (62) that contacts the wall plate is provided with a contact roller (63); A plurality of lifting frames (7) are vertically mounted on the base (1) and are located between adjacent vertical frames (5). The lifting frames (7) can be lowered to a position lower than the upper side of the annular track (2) or protrude above the upper side of the annular track (2); A plurality of external welding mechanisms (8) are respectively arranged on each lifting frame (7) and are used for welding the outer side joint seams of the wall panels; The following steps are also included: S1, taking a plurality of unjoined semi-annular wall panels and pushing them to the upper side of the annular track (2) through the feeding channel (9), so that the inner sides of the semi-annular wall panels are in contact with the ring frame (3), and the wall panels are joined to form a complete ring; S2, the lower clamping device (6) of each stand (5) is actuated to clamp each semi-annular wall panel; S3, the annular track (2) rotates to drive the entire annular wall panel to rotate until the joint seams of the semi-annular wall panels are located at the position of the feeding channel (9); S4, the lifting frame (7) rises, driving the outer welding mechanism (8) to move vertically to weld the outer sides of the vertical joint seams of the adjacent semi-annular wall panels, and at the same time, the inner welding mechanism (4) moves vertically to weld the inner sides of the vertical joint seams of the adjacent semi-annular wall panels; S5, the lower clamping device (6) moves upward, driving the wall panel welded into a whole ring to move upward at the same time, leaving space for the height of the next wall panel; S6, repeat S1-S4 to complete the welding of the lower half ring; S7, the annular track (2) rotates to drive the two welded wall panels to rotate in situ, and at the same time, the annular weld between the vertically arranged full annular wall panels is welded by the inner welding mechanism and the outer welding mechanism (8); Repeat S1-S7 to complete the welding of all the wall panels of the tank.

2. The wall plate welding method of a large storage tank according to claim 1 is characterized in that: The wall panel welding device also includes: A gear ring (21) is coaxially fixed to the lower side of the annular track (2); A driving gear (22) is rotatably disposed on the base (1) and meshes with the ring gear (21); The first driving member is fixed to the base (1) and is used to drive the driving gear (22) to rotate.

3. The wall plate welding method of a large storage tank according to claim 1 is characterized in that: The inner welding mechanism (4) comprises: A first welding machine (41) is vertically slidably disposed on the ring frame (3); The push cylinder (42) is fixed to the ring frame (3) and is used to push the first welding machine (41) to move up and down.

4. The wall plate welding method of a large storage tank according to claim 1 is characterized in that: Also includes: The stepping motor (55) is fixed to the stand (5) and is used to drive the sprocket wheel (54) to rotate.

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