Submerged-arc welding equipment and welding method

Abstract

The invention provides submerged-arc welding equipment and a welding method. The submerged-arc welding equipment comprises a bearing table, a rotating mechanism, an adjusting mechanism and a welding mechanism. The slewing mechanism is arranged on the bearing table; the rotating mechanism comprises a rotating shaft; the rotating shaft extends along a first direction; the adjusting mechanism is provided with a first end and a second end which are opposite, the first end is connected to the free end of the rotating shaft, and the second end can move relative to the first end; the welding mechanism comprises a rotating part and a welding gun, the rotating part is rotatably connected to the second end, and the rotating part can rotate around the rotating axis of the rotating part; the welding gun is connected to the rotating piece and rotates along with the rotating piece. When the curved surface structure and the connecting pipe are welded in a submerged-arc welding mode, the rotating mechanism is moved so that the connecting pipe can be located on the side, provided with the adjusting mechanism, of the rotating shaft. And through rotation of the rotating shaft, movement of the adjusting mechanism and rotation of the rotating part, the welding end of the welding gun moves along the welding gap, so that the curved surface structure and the connecting pipe are stably and efficiently welded, and the production efficiency of products is improved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and particularly relates to a submerged arc welding equipment and a welding method. Background Art

[0002] Submerged arc welding is a welding method in which an arc burns under a flux layer. During welding, an arc is generated between the welding wire and the workpiece and is completely covered by the flux, avoiding the exposure of the arc light and protecting the molten pool from air pollution.

[0003] In the related art, when welding is required between a curved surface structure and a non-radial nozzle on the curved surface structure, first, the curved surface structure is abutted against the circumferential edge of the nozzle port of the nozzle so that the radial direction of the curved surface structure intersects with the axial direction of the nozzle. Then, the welding gun is manually controlled to weld the curved surface structure and the nozzle so that the weld bead between the curved surface structure and the nozzle is a saddle-shaped structure.

[0004] However, the welding process between the curved surface structure and the non-radial nozzle on the curved surface structure needs to be manually welded, resulting in low welding efficiency and low product production efficiency. Summary of the Invention

[0005] The purpose of the present application is to provide a submerged arc welding equipment and a welding method capable of automatically welding a curved surface structure and a non-radial nozzle on the curved surface structure to improve the production efficiency of products.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] According to one aspect of the present application, the present application provides a submerged arc welding equipment. There is an intersection line between a curved surface structure and a non-radial nozzle relative to the curved surface structure, and the welding equipment is used to weld the welding seam where the intersection line is located; the welding equipment includes: a bearing platform, a rotary mechanism, an adjusting mechanism, and a welding mechanism; the rotary mechanism is arranged on the bearing platform; the rotary mechanism includes a rotary shaft and a rotary driving member for driving the rotary shaft to rotate; the rotary shaft extends along a first direction; the adjusting mechanism has opposite first and second ends, the first end is connected to the free end of the rotary shaft, and the second end can move relative to the first end along the first direction, the second direction, and the third direction, and any two of the first direction, the second direction, and the third direction are perpendicular to each other; the welding mechanism includes a rotating member and a welding gun, the rotating member is rotatably connected to the second end, the rotation axis of the rotating member is perpendicular to the first direction, and the rotating member can rotate around its own rotation axis; the welding gun is connected to the rotating member and can rotate following the rotating member; wherein, when the welding mechanism welds the curved surface structure and the non-radial nozzle on the curved surface structure, the axial direction of the nozzle extends along the first direction and is located on the side of the rotary shaft where the adjusting mechanism is arranged.

[0008] In some embodiments, the welding mechanism further includes a deflection angle adjustment component, which is connected between the rotating member and the welding torch. The deflection angle adjustment component can drive the welding end of the welding torch to approach or move away from the rotating member; the deflection angle adjustment component can adjust the inclination angle between the welding torch and the intersection line welding position, so that the welding end of the welding torch can be inserted into the welding gap.

[0009] In some embodiments, the deflection angle adjustment component includes a fixed seat and an arc plate that are slidably connected. The fixed seat is fixedly connected to the rotating member; the arc plate can slide relative to the fixed seat along its own extension direction, and the arc plate is fixedly connected to the welding torch.

[0010] In some embodiments, an arc groove is formed on one side of the arc plate facing the fixed seat. The arc groove extends along the extension direction of the arc plate, and the arc plate is slidably sleeved on the fixed seat through the arc groove;

[0011] The deflection angle adjustment component further includes a skew gear, a skew motor, and a rack. The skew gear is rotatably arranged on the fixed seat; the skew motor is arranged on the skew fixed seat and is in transmission connection with the skew gear; the rack is arranged on the arc plate. The rack extends along the extension direction of the arc plate, and the rack meshes with the skew gear, so that the skew gear can drive the arc plate to slide relative to the fixed seat through the rack.

[0012] In some embodiments, the welding torch extends along the radial direction of the circle where the arc plate is located.

[0013] In some embodiments, the welding equipment includes a moving mechanism. The moving mechanism includes: a column that extends along a first direction and is arranged on the bearing platform; a sliding seat that is slidably connected to the column along the first direction so as to be able to drive the slewing mechanism to move along the first direction; a moving arm that extends along a third direction. The moving arm is slidably arranged on the sliding seat along the third direction, and the moving arm can drive the slewing mechanism to move along the third direction; an adjustment fixing plate that extends along a second direction. The adjustment fixing plate is fixedly arranged at one end of the moving arm; the slewing mechanism is slidably connected to the adjustment fixing plate along the second direction.

[0014] In some embodiments, a rotating platform is further arranged at the lower end of the column. The rotating platform is movably connected to the bearing seat along the second direction, and the column is rotatably connected to the rotating platform around its own axis.

[0015] In some embodiments, the adjusting mechanism includes an adjusting base, a first moving member, a second moving member, and a third moving member. The adjusting base is fixedly connected to the rotating shaft; the first moving member extends along a second direction and is movably connected to the adjusting base along the second direction; the second moving member extends along a third direction and is movably connected to the first moving member along the third direction; the third moving member extends along a first direction and is movably connected to the second moving member along the first direction.

[0016] A submerged arc welding method uses the submerged arc welding equipment described in any one of the above. It includes: adjusting the positions of the welding equipment, the curved surface structure, and the nozzle so that the nozzle is located on the side of the rotating shaft where the adjusting mechanism is provided; moving the welding mechanism through the adjusting mechanism so that the welding mechanism approaches the circumferential side wall of the nozzle; starting the rotating member to rotate so that the welding end of the welding torch moves to the intersection line; starting the welding torch to start welding; starting the rotating shaft so that the rotating shaft drives the welding torch to rotate around the axis of the nozzle, and the adjusting mechanism and the rotating member are started, so that the welding end of the welding torch moves along the welding seam while welding.

[0017] In some embodiments, the welding mechanism includes an angle adjustment assembly; when the slewing mechanism drives the welding end of the welding torch to rotate around the nozzle, the angle adjustment assembly can adjust the angle between the welding torch and the welding point of the intersection line so that the welding end of the welding torch can extend into the welding seam.

[0018] In some embodiments, when the welding torch moves from top to bottom, the melting speed of the welding wire of the welding torch gradually decreases; when the welding torch moves from bottom to top, the melting speed of the welding wire of the welding torch gradually increases.

[0019] From the above technical solutions, it can be seen that the present application has at least the following advantages and positive effects:

[0020] In the present application, when submerged arc welding is performed between a curved surface structure and a non-radial nozzle on the curved surface structure, the slewing mechanism is moved so that the rotating shaft approaches the nozzle, so that the nozzle is located on the side of the rotating shaft where the adjusting mechanism is provided. Then, the welding mechanism is moved through the adjusting mechanism so that the welding mechanism moves to the circumferential side of the nozzle. The rotating member rotates to drive the welding torch to move to the welding seam between the curved surface structure and the nozzle. The slewing mechanism drives the rotating shaft to rotate, the adjusting mechanism adjusts the welding torch, and the rotating member rotates so that the welding end of the welding torch moves along the welding seam, thereby stably and efficiently welding the curved surface structure and the nozzle and improving the production efficiency of the product. Description of the Drawings

[0021] Figure 1It is a schematic structural diagram of the submerged arc welding equipment and the workpiece to be welded of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the submerged arc welding equipment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the slewing mechanism, adjusting mechanism, welding mechanism of the welding equipment and the workpiece to be welded of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the slewing mechanism, adjusting mechanism, welding mechanism of the welding equipment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the welding mechanism of the welding equipment of the present invention.

[0026] Figure 6 It is a schematic flow diagram of the welding method of the present invention.

[0027] Figure 7 It is a schematic flow diagram of step S410 of the welding method of the present invention.

[0028] Figure 8 It is a schematic flow diagram of step S420 of the welding method of the present invention.

[0029] The description of the reference numerals is as follows: 11, curved surface structure; 12, nozzle; 20, welding equipment; 300, bearing platform; 310, slide rail; 400, moving mechanism; 410, rotating platform; 420, column; 430, sliding seat; 440, moving arm; 450, adjusting fixing plate; 500, slewing mechanism; 510, protective shell; 520, slewing driving part; 530, slewing shaft; 600, adjusting mechanism; 610, first moving part; 620, second moving part; 630, third moving part; 700, welding mechanism; 710, rotating part; 720, deflection angle adjusting component; 721, fixed seat; 722, arc plate; 723, arc groove; 730, welding torch; 810, wire feeding wheel; 820, controller. Detailed Description of the Invention

[0030] Typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments, all of which do not depart from the scope of the present application, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present application.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "plurality" is two or more unless otherwise specifically defined.

[0032] In the related art, the workpiece to be welded includes a curved surface structure 11 and a non-radial nozzle 12 disposed relative to the curved surface structure 11. The curved surface structure 11 needs to be connected to the non-radial nozzle 12 relative to the curved surface structure 11 to fix the nozzle 12 on the curved surface structure 11. There is an intersection curve between the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11, and this intersection curve is the shape of the welding gap between the two.

[0033] In some embodiments, the curved surface structure 11 may be an arc-shaped plate 722 or a head.

[0034] In some embodiments, the nozzle 12 may be located on the convex side of the curved surface structure 11 or on the concave side of the curved surface structure 11.

[0035] In some embodiments, the intersection curve is in a saddle shape.

[0036] Figure 1 It is a schematic structural diagram of the submerged arc welding equipment and the workpiece to be welded of the present invention.

[0037] Refer to Figure 1 , for the convenience of understanding and description, the direction of the Z-axis in Figure 1 is the first direction below; the direction of the Y-axis in Figure 1 is the second direction below; the direction of the X-axis in Figure 1 is the third direction below.

[0038] Figure 2 It is a schematic structural diagram of the submerged arc welding equipment of the present invention. Figure 3 It is a schematic structural diagram of the slewing mechanism, adjusting mechanism, welding mechanism of the welding equipment of the present invention and the workpiece to be welded. Figure 4It is a schematic structural diagram of the slewing mechanism, adjusting mechanism, and welding mechanism of the welding equipment of the present invention. Figure 5 It is a schematic structural diagram of the welding mechanism of the welding equipment of the present invention.

[0039] Refer to Figures 1 to 5 , this application provides a submerged arc welding equipment 20, which is used to weld the welding seam where the intersecting line is located between the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11. The submerged arc welding equipment 20 (hereinafter simply referred to as the welding equipment 20) includes a bearing platform 300, a slewing mechanism 500, an adjusting mechanism 600, and a welding mechanism 700. The slewing mechanism 500 is arranged on the bearing platform 300. The slewing mechanism 500 includes a slewing shaft 530 and a slewing driving member 520 for driving the slewing shaft 530 to rotate. The slewing shaft 530 extends along the first direction. The adjusting mechanism 600 has opposite first and second ends. The first end is connected to the free end of the slewing shaft 530, and the second end can move relative to the first end along the first, second, and third directions. Any two of the first, second, and third directions are perpendicular to each other. The welding mechanism 700 includes a rotating member 710 and a welding torch 730. The rotating member 710 is rotatably connected to the second end. The rotation axis of the rotating member 710 is perpendicular to the first direction, and the rotating member 710 can rotate around its own rotation axis. The welding torch 730 is connected to the rotating member 710 and can rotate following the rotating member 710. Among them, when the welding mechanism 700 welds the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11, the axial direction of the nozzle 12 extends along the first direction.

[0040] When the welding equipment 20 welds the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11, the slewing mechanism 500 and / or the workpiece to be welded are selectively moved so that the nozzle 12 is located on the side of the slewing shaft 530 where the adjusting mechanism 600 is arranged. Then, the welding mechanism 700 is moved through the adjusting mechanism 600 so that the welding mechanism 700 approaches the circumferential side of the nozzle 12. The rotating member 710 rotates to drive the welding torch 730 to move to the welding seam between the curved surface structure 11 and the nozzle 12. The slewing mechanism 500 drives the slewing shaft 530 to rotate to drive the adjusting mechanism 600 and the welding mechanism 700 to rotate. When the adjusting mechanism 600 and the welding mechanism 700 rotate, the adjusting mechanism 600 and the rotating member 710 can adjust the position of the welding end of the welding torch 730 so that the welding end of the welding torch 730 moves along the welding seam, thereby stably and efficiently welding the curved surface structure 11 and the nozzle 12 and improving the production efficiency of the product.

[0041] Refer to Figures 1 to 5 , in this embodiment, the bearing platform 300 is used to support and position the slewing mechanism 500 to ensure the stability and reliability of the welding equipment 20.

[0042] The bearing platform 300 may be provided with a slide rail 310, and the slide rail 310 can be used to adjust the positions of the slewing mechanism 500, the adjusting mechanism 600 and the welding mechanism 700 relative to the workpiece to be welded, so as to facilitate the welding mechanism 700 to quickly approach the workpiece to be welded and improve the welding efficiency of the welding equipment 20.

[0043] In some embodiments, the bearing platform 300 extends in the second direction. The slide rail 310 extends in the second direction.

[0044] In other embodiments, there are two slide rails 310. Both of the two slide rails 310 extend in the second direction and are arranged at intervals in the third direction to facilitate the movement of the slewing mechanism 500, the adjusting mechanism 600 and the welding mechanism 700.

[0045] In some embodiments, the bearing platform 300 may be a mobile trolley, so that the welding equipment 20 can move arbitrarily, improving the transportation efficiency of the welding equipment 20.

[0046] Refer to Figures 1 to 2 , in this embodiment, the welding equipment 20 further includes a moving mechanism 400. The moving mechanism 400 includes: a column 420, a sliding seat 430 and a moving arm 440. The column 420 extends in the first direction and is arranged on the bearing platform 300. The sliding seat 430 is slidably connected to the column 420 in the first direction to be able to drive the slewing mechanism 500 to move in the first direction. The moving arm 440 extends in the third direction, and the moving arm 440 is slidably arranged on the sliding seat 430 in the third direction. The moving arm 440 can drive the slewing mechanism 500 to move in the third direction.

[0047] When the staff uses the welding equipment 20, the workpiece to be welded can be moved to the periphery of the bearing platform 300, and then by moving the sliding seat 430 in the first direction and moving the moving arm 440 in the third direction, the slewing mechanism 500 can be made to approach the workpiece to be welded, and the connecting pipe 12 is located on the side where the adjusting mechanism 600 is arranged on the rotating shaft 530, so as to facilitate the subsequent rotation of the adjusting mechanism 600 and the welding mechanism 700 around the rotating shaft 530.

[0048] Refer to Figures 1 to 2 , in this embodiment, the column 420 is movably arranged on the bearing platform 300, so that the moving mechanism 400 can approach or move away from the workpiece to be welded, thereby improving the use efficiency of the welding equipment 20.

[0049] In some embodiments, the column 420 is slidably arranged on the slide rail 310, so that the column 420 can slide on the slide rail 310 in the second direction, facilitating the loading and unloading of the workpiece to be welded.

[0050] The column 420 is slidably arranged on the slide rail 310 and can adjust the position of the slewing mechanism 500 etc. in the second direction, so as to facilitate the welding equipment 20 to weld and process workpieces to be welded with various sizes, improve the processing range, improve the versatility and reduce the welding cost.

[0051] In some embodiments, the moving mechanism 400 may further include a rotating platform 410. The rotating platform 410 is arranged at the lower end of the column 420. The rotating platform 410 is movably connected to the bearing seat along the second direction, and the column 420 is rotatably connected to the rotating platform 410 around its own axis.

[0052] Workpieces to be welded can be placed on both sides of the bearing table 300. After the workpiece to be welded on one side of the bearing table 300 is welded, the column 420 can rotate around its own axis relative to the rotating platform 410 to move the slewing mechanism 500, the adjusting mechanism 600 and the welding mechanism 700 to the other side of the bearing table 300 for welding the workpiece to be welded on the other side, thereby effectively improving the working efficiency of the welding equipment 20 and reducing the welding cost.

[0053] In some other embodiments, the rotating platform 410 is slidably arranged on the slide rail 310. On the one hand, it enables the rotating platform 410 to drive the moving mechanism 400 to slide on the slide rail 310, so that the welding equipment 20 can adapt to workpieces to be welded with various sizes and move to the intersection line of the corresponding workpiece to be welded; on the other hand, it can effectively ensure the stability of the welding equipment 20 and avoid the moving arm 440 in the slewing mechanism 500, the adjusting mechanism 600 and the welding machine mechanism.

[0054] In some embodiments, a first driving motor (not shown in the figure), an adjusting gear (not shown in the figure) and an adjusting rack (not shown in the figure) may be arranged between the rotating platform 410 and the bearing table 300. The first driving motor is arranged on the rotating platform 410, and the adjusting gear is arranged on the first driving motor to be able to rotate driven by the motor. The adjusting rack is arranged on the bearing table 300 and extends along the second direction. The adjusting gear meshes with the adjusting rack. The first driving motor can drive the adjusting gear to rotate, so that the adjusting gear moves on the adjusting rack, thereby driving the rotating platform 410 to move relative to the bearing table 300.

[0055] In some other embodiments, the rotating platform 410 and the bearing table 300 may also be in relative movement through transmission methods such as screw transmission, chain transmission, pneumatic transmission, hydraulic transmission, etc.

[0056] In some embodiments, a column 420 rotating motor (not shown in the figure) is arranged inside the column 420. The column 420 rotating motor can drive the column 420 to rotate around the axis of the column 420 itself relative to the rotating platform 410.

[0057] Refer to Figures 1 to 2 In this embodiment, the slide base 430 is slidably disposed on the column 420.

[0058] In some embodiments, the slide base 430 is sleeved on the column 420, so as to ensure the connection strength and reliability between the slide base 430 and the column 420.

[0059] The slide base 430 is connected to the slewing mechanism 500. The slide base 430 slides along the first direction, which can drive the slewing mechanism 500 to move, so as to adjust the position of the slewing mechanism 500 in the first direction, facilitate the slewing mechanism 500 to approach the workpiece to be welded, and improve the working efficiency of the welding equipment 20.

[0060] In some embodiments, a plurality of stabilizing rods may be provided on the circumferential side of the column 420. The plurality of stabilizing rods extend along the first direction. The stabilizing rods are connected to the column 420 to be able to rotate following the column 420. The slide base 430 is sleeved on the stabilizing rods to ensure the stability, reliability and safety when the slide base 430 slides.

[0061] In some embodiments, the driving structure between the slide base 430 and the column 420 may refer to the driving structure between the rotating platform 410 and the carrying platform 300 above. That is, a second driving motor (not shown in the figure), an adjusting gear, an adjusting rack, etc. may be provided between the slide base 430 and the column 420. The second driving motor is disposed on the slide base 430, and the adjusting rack is disposed on the column 420.

[0062] In other embodiments, the slide base 430 and the column 420 may be relatively moved through transmission modes such as screw transmission, chain transmission, pneumatic transmission, and hydraulic transmission.

[0063] Refer to Figures 1 to 2 In this embodiment, the moving arm 440 extends along the third direction. The moving arm 440 is movably disposed on the slide base 430 along the third direction. The moving arm 440 can be connected to the slewing mechanism 500, so that the moving arm 440 moves along the third direction, which can adjust the position of the slewing mechanism 500 in the third direction, facilitate the slewing mechanism 500 to approach the workpiece to be welded, and improve the working efficiency of the welding equipment 20.

[0064] In some embodiments, the drive structure between the moving arm 440 and the carriage 430 may refer to the drive structure between the rotating platform 410 and the carrier 300 described above. That is, a third drive motor (not shown in the figure), an adjusting gear, an adjusting rack, etc. may be provided between the moving arm 440 and the carriage 430. The third drive motor is disposed on the carriage 430 / or, and the adjusting rack is disposed on the moving arm 440 or the carriage 430, so that the moving arm 440 and the carriage 430 can move relative to each other.

[0065] In other embodiments, the moving arm 440 and the carriage 430 may be driven by means of screw drive, chain drive, pneumatic drive, hydraulic drive, etc. to achieve relative movement between the moving arm 440 and the carriage 430.

[0066] Refer to Figures 1 to 2 , in this embodiment, the moving mechanism 400 may further include an adjusting fixing plate 450. The adjusting fixing plate 450 extends along the second direction, and the adjusting fixing plate 450 is fixedly disposed at one end of the moving arm 440 so as to be able to move along with the moving arm 440. The slewing mechanism 500 is slidably connected to the adjusting fixing plate 450 along the second direction so as to be able to adjust the position of the slewing mechanism 500 relative to the second direction, thereby facilitating the slewing mechanism 500 to approach or move away from the workpiece to be welded and improving the working efficiency.

[0067] In some embodiments, the adjusting fixing plate 450 may be fixedly connected to the moving arm 440 to improve the reliability and safety between the adjusting fixing plate 450 and the moving arm 440.

[0068] In some embodiments, the adjusting fixing plate 450 is movably connected to the moving arm 440 so that the adjusting fixing plate 450 can move relative to the moving arm 440 along the second direction, thereby being able to adjust the relative position of the slewing mechanism 500 along the second direction, facilitating multi-stage adjustment of the position of the slewing mechanism 500, improving the applicable range of the welding equipment 20, and improving the practicality of the welding equipment 20.

[0069] Refer to Figures 1 to 2 , in this embodiment, the drive structure between the adjusting fixing plate 450 and the slewing mechanism 500 may refer to the drive structure between the rotating platform 410 and the carrier 300 described above. That is, a third drive motor, an adjusting gear, an adjusting rack, etc. may be provided between the adjusting fixing plate 450 and the slewing mechanism 500. The third drive motor is disposed on the carriage 430 / or, and the adjusting rack is disposed on the moving arm 440 or the carriage 430, so that the moving arm 440 and the carriage 430 can move relative to each other.

[0070] In some other embodiments, the moving arm 440 and the carriage 430 may be connected by means of screw drive, chain drive, pneumatic drive, hydraulic drive or other drive means to achieve relative movement between the moving arm 440 and the carriage 430.

[0071] Refer to Figures 1 to 4 , in this embodiment, the slewing mechanism 500 is movably connected to the adjusting fixing plate 450, so that the slewing mechanism 500 can not only move along the first direction, the second direction and the third direction following the adjusting fixing plate 450, but also the slewing mechanism 500 can move relative to the adjusting fixing plate 450 along the second direction, so that the slewing mechanism 500 can approach or move away from the workpiece to be welded, improving the adjustment accuracy and adjustment freedom of the welding equipment 20.

[0072] Refer to Figures 1 to 4 , in this embodiment, the slewing mechanism 500 may include a protective shell 510, a slewing drive member 520 and a slewing shaft 530. The protective shell 510 is movably connected to the adjusting fixing plate 450. The slewing drive member 520 is disposed on the protective shell 510. The slewing shaft 530 is rotatably disposed on the protective shell 510 and is in transmission connection with the slewing drive member 520. The slewing shaft 530 extends along the first direction. The slewing drive member 520 can drive the slewing shaft 530 to rotate about its own rotation axis, so that the welding mechanism 700 can rotate along the saddle-shaped welding seam.

[0073] Before the welding equipment 20 welds the workpiece to be welded, the rotating platform 410, the column 420, the carriage 430, the moving arm 440 and the protective shell 510 can be adjusted so that the slewing shaft 530 can approach the workpiece to be welded, facilitating the slewing mechanism 500 to drive the welding mechanism 700 to rotate, improving the welding efficiency and welding accuracy of the welding equipment 20.

[0074] In some embodiments, the slewing drive member 520 may be disposed inside the protective shell 510.

[0075] In some embodiments, the rotation axis of the slewing shaft 530 is coaxially arranged with the axis of the connecting pipe 12, facilitating the slewing shaft 530 to drive the welding mechanism 700 to rotate, thus ensuring the rotation accuracy of the slewing mechanism 500 and facilitating the rotary machining of the welding mechanism 700.

[0076] Refer to Figures 1 to 4 , in this embodiment, the welding equipment 20 includes an adjusting mechanism 600. The adjusting mechanism 600 is disposed at the free end of the slewing shaft 530 to be able to move along the first direction, the second direction and the third direction following the slewing shaft 530.

[0077] The adjusting mechanism 600 includes an adjusting base (not shown in the figure), a first moving member 610, a second moving member 620, and a third moving member 630. The adjusting base is fixedly connected to the rotating shaft 530 to rotate following the rotating shaft 530. The first moving member 610 extends along a second direction and is movably connected to the adjusting base along the second direction. The second moving member 620 extends along a third direction and is movably connected to the first moving member 610 along the third direction. The third moving member 630 extends along a first direction and is movably connected to the second moving member 620 along the first direction.

[0078] Before the welding equipment 20 performs welding, by moving the first moving member 610, the second moving member 620, and the third moving member 630, the welding mechanism 700 is brought close to the circumferential side of the nozzle 12, and the welding end of the welding torch 730 can be located at the welding seam. When the welding equipment 20 is welding, the rotating shaft 530 rotates, and the first moving member 610, the second moving member 620, and the third moving member 630 can all move, so that the welding end of the welding torch 730 moves along the saddle-shaped welding seam to weld the curved surface structure 11 and the nozzle 12, ensuring the continuity, integrity, reliability, and safety of the weld seam.

[0079] In some embodiments, the adjusting base is the first end of the adjusting mechanism 600, and the end of the third moving member 630 close to the welded part is the second end of the adjusting mechanism 600.

[0080] In some embodiments, the transmission structure between the first moving member 610 and the adjusting base can be a first moving motor and a screw. The first moving motor is arranged at the end of the first moving member 610. A screw is arranged on the first moving member 610. The screw extends along the second direction and is in transmission connection with the first moving motor, so that the first moving motor can drive the screw to rotate around its own rotation axis. The adjusting base is in threaded connection with the screw. When the first moving motor drives the screw to rotate, the screw rotates in the adjusting base, so that the first moving member 610 moves relative to the adjusting base along the extending direction of the first moving member 610.

[0081] In other embodiments, the first moving member 610 and the adjusting base can be in relative movement through transmission methods such as gear transmission, chain transmission, pneumatic transmission, and hydraulic transmission.

[0082] In some other embodiments, a support structure (not shown in the figure) is further provided between the first moving member 610 and the adjustment base. The support structure can be disposed on the adjustment base or the rotary shaft 530. A part of the support structure can extend into the first moving member 610 to clamp or limit the first moving member 610. Thus, when the first moving member 610 moves relative to the adjustment base, the support structure can support the first moving member 610 to ensure the safety and reliability of the first moving member 610 during movement.

[0083] The support structure can be a support hook. One end of the support hook is fixedly connected to the adjustment base or the rotary shaft 530. A support groove is formed on the first moving member 610 and extends along the extending direction of the first moving member 610. The other end of the support hook extends into the support groove and supports against one side wall of the support groove, thereby ensuring the safety, reliability and stability of the adjustment mechanism 600.

[0084] Refer to Figures 1 to 4 , in this embodiment, the transmission structure between the second moving member 620 and the first moving member 610 can refer to the transmission structure between the first moving member 610 and the adjustment base, so that the second moving member 620 can move relative to the first moving member 610 along the extending direction of the second moving member 620.

[0085] Refer to Figures 1 to 4 , in this embodiment, the transmission structure between the third moving member 630 and the second moving member 620 can refer to the transmission structure between the first moving member 610 and the adjustment base, so that the third moving member 630 can move relative to the second moving member 620 along the extending direction of the third moving member 630.

[0086] Refer to Figures 1 to 5 , in this embodiment, the welding mechanism 700 is disposed at one end of the third moving member 630 away from the rotary shaft 530. The welding mechanism 700 is connected to the third moving member 630, so as to facilitate the welding mechanism 700 to move along the first direction, the second direction and the third direction following the third moving member 630, and also facilitate the welding mechanism 700 to rotate around the axis of the rotary shaft 530 following the third moving member 630.

[0087] The welding mechanism 700 includes a rotating member 710 and a welding torch 730. The rotating member 710 is rotatably connected to the third moving member 630 around its own axis. The rotation axis of the rotating member 710 is perpendicular to the first direction. The welding torch 730 is connected to the rotating member 710 to be able to rotate following the rotating member 710.

[0088] When the rotating member 710 rotates about its own rotation axis, the welding torch 730 rotates synchronously about the rotation axis of the rotating member 710. In a plane perpendicular to the rotation axis of the rotating member 710, the rotating member 710 rotates to be able to adjust the angle between the welding torch 730 and the nozzle 12, so that the welding end of the welding torch 730 can approach or move away from the nozzle 12.

[0089] When the welding equipment 20 is welding a welding seam, the adjusting mechanism 600 and the welding mechanism 700 both rotate about the axis of the return rotation shaft 530. The first moving member 610, the second moving member 620 and the third moving member 630 move respectively to adjust the position of the welding mechanism 700. The rotating member 710 rotates to be able to adjust the angle between the welding torch 730 and the nozzle 12 following the movement of the fine movement structure, so that the welding torch 730 can move along the saddle-shaped intersection line, thereby welding the welding seam, effectively ensuring the integrity of the weld, avoiding weld fracture, and improving the welding quality.

[0090] In the related art, due to factors such as radian or processing, the sizes of the welding seams at various positions between the curved surface mechanism and the nozzle 12 are different, so that the welding end of the welding torch 730 cannot extend into the interior of the welding seam.

[0091] In some embodiments, a welding rotation motor (not shown in the figure) is provided on the third rotating member 710, and the welding rotation motor is in transmission connection with the rotating member 710, so as to facilitate the rotation of the rotating member 710 relative to the third rotating member 710.

[0092] Refer to Figures 1 to 5 In this embodiment, the welding mechanism 700 further includes a declination adjusting assembly 720. The declination adjusting assembly 720 is connected between the rotating member 710 and the welding torch 730. The declination adjusting assembly 720 can drive the welding end of the welding torch 730 to approach or move away from the rotating member 710. The declination adjusting assembly 720 can adjust the inclination angle between the welding torch 730 and the intersection line welding position, so that the welding end of the welding torch 730 can be inserted into the welding seam.

[0093] When the return rotation shaft 530 rotates and the welding end of the welding torch 730 moves along the welding seam, the declination adjusting assembly 720 can effectively adjust the inclination angle between the welding torch 730 and the intersection line welding position, so that the welding end of the welding torch 730 can be inserted into the welding seam, thereby facilitating the welding torch 730 to input the molten body after melting the welding wire to various positions of the welding seams with different sizes at various angles, ensuring the uniform welding quality of each part of the welding seam, avoiding different volumes of the molten body at each part inside the weld, and ensuring the reliability, stability and safety of the welding.

[0094] Refer to Figures 1 to 5In this embodiment, the deflection angle adjustment assembly 720 includes a slidably connected fixed seat 721 and an arc plate 722. The fixed seat 721 is fixedly connected to the rotating member 710 so as to rotate with the rotating member 710. The arc plate 722 can slide relative to the fixed seat 721 along its own extension direction, and the arc plate 722 is fixedly connected to the welding gun 730.

[0095] When the welding mechanism 700 welds the welding gap, the rotating part 710 rotates to adjust the angle between the welding gun 730 and the connecting pipe 12, and the arc plate 722 moves relative to the fixed seat 721 to tilt the welding gun 730, so that the welding gun 730 can extend into the welding gap when rotating around the rotating axis 530, thereby effectively improving the quality of the molten body at various locations in the weld, ensuring that the curved structure 11 and the connecting pipe 12 are welded stably, reliably and firmly, and ensuring the welding quality.

[0096] See also Figures 1 to 5 In this embodiment, an arc groove 723 is provided on one side of the arc plate 722 facing the fixed seat 721, and the arc groove 723 extends along the extension direction of the arc plate 722. The arc plate 722 can be slidably mounted on the fixed seat 721 through the arc groove 723, so as to effectively improve the connection strength, stability and reliability between the arc plate 722 and the fixed seat 721.

[0097] In some embodiments, the two opposite side walls in the arc groove 723 are further provided with engaging grooves, which extend along the extending direction of the arc groove 723. After a portion of the fixing seat 721 extends into the engaging groove, the inner wall of the engaging groove can be limited by the fixing seat 721, so that the arc plate 722 can only move along the arc relative to the fixing seat 721, thereby improving the reliability and stability of the arc plate 722 and the fixing seat 721.

[0098] In some embodiments, the fixing seat 721 can be provided with a plurality of limiting wheels (not shown in the figure) respectively relative to the two engaging grooves. The plurality of limiting wheels are arranged at intervals, and the rotation axes of the plurality of limiting wheels are on the extended arc line of the arc groove 723. When the arc plate 722 rotates relative to the fixing seat 721, the limiting wheels can effectively reduce the friction between the arc plate 722 and the fixing seat 721, thereby facilitating the rotation of the arc plate 722 relative to the fixing seat 721.

[0099] In some embodiments, the angle adjustment assembly 720 further includes a skew gear (not shown in the figure), a skew motor and a rack. The skew gear is rotatably arranged on the fixed seat 721. The skew motor is arranged on the skew fixed seat 721 and is in driving connection with the skew gear. The rack is arranged on the arc plate 722, the rack extends along the extension direction of the arc plate 722, and the rack is meshed with the skew gear, so that the skew gear can drive the arc plate 722 to slide relative to the fixed seat 721 through the rack.

[0100] When the torch 730 needs to be deflected, the deflection motor drives the deflection gear to rotate. The deflection gear drives the deflection rack to rotate relative to the fixed seat 721, so that the torch 730 approaches or moves away from the rotating member 710, thereby adjusting the angle between the local line segment at the intersection welding part and the torch 730, facilitating the insertion of the torch 730 into the welding gap, and effectively improving the welding quality.

[0101] In some other embodiments, the deflection rack is arranged in the arc-shaped groove 723. The deflection gear is arranged on the fixed seat 721 and extends into the arc-shaped groove 723, so that the arc-shaped plate 722 can protect the deflection gear and the deflection rack.

[0102] In this embodiment, the torch 730 extends along the radial direction of the circle where the arc-shaped plate 722 is located, so as to facilitate calculating the deflection angle of the torch 730 when following the rotation of the arc-shaped plate 722 relative to the fixed seat 721, thereby facilitating the control of the welding equipment 20 and improving the processing precision, reliability and stability of the welding equipment 20.

[0103] In some embodiments, the welding end of the torch 730 is located at the center of the circle where the arc-shaped plate 722 is located, so that when the arc-shaped plate 722 rotates relative to the fixed seat 721, it does not affect the position of the welding end of the torch 730, but only changes the deflection angle of the torch.

[0104] In the related art, in submerged arc welding, the welding wire is usually thick and has strong rigidity. If some welding wires are bent during the welding process, the following problems will occur: the wire feeding speed of the torch 730 fluctuates or jams, the welding wire deviates from the intersection line, and the arc of the torch 730 shifts, resulting in uneven heat distribution.

[0105] Refer to Figures 1 to 5 , in this embodiment, the welding equipment 20 further includes a wire feeding wheel 810 and a plurality of wire feeding frames (not shown in the figure). The wire feeding wheel 810 is arranged on the protective shell 510. The wire feeding wheel 810 is wound with the welding wire for submerged arc welding. The wire feeding frame is used to limit the welding wire to avoid bending of the welding wire.

[0106] In some embodiments, the plurality of wire feeding frames can be arranged on the adjusting mechanism 600.

[0107] In some embodiments, the plurality of wire feeding frames can be arranged on the welding mechanism 700.

[0108] In some embodiments, the plurality of wire feeding frames can also be arranged on the adjusting mechanism 600 and / or the welding mechanism 700.

[0109] When the first moving member 610, the second moving member 620, the third moving member 630, the rotating member 710, and the deflection angle adjusting assembly 720 rotate following the rotary shaft 530, multi-stage bending of the welding wire can also be achieved through the wire holder. While ensuring the arc of the wire holder, the welding wire can stably and reliably extend into the welding torch 730, facilitating the stable melting of the welding wire by the welding torch 730, enabling the welding wire to be stably melted within the welding seam, and ensuring the welding quality of the weld seam.

[0110] Refer to Figures 1 to 5 , in this embodiment, the welding equipment 20 further includes a controller 820. The controller 820 can be electrically connected to the first driving motor, the column 420 rotating motor, the second driving motor, the third driving motor, the rotary driving member 520, the first moving motor, the second moving motor, the third moving motor, the welding rotating motor, and the skew motor, so as to be able to control the operation of each driving structure separately or simultaneously, thereby facilitating the staff to control the operation of the welding equipment 20 through the controller 820.

[0111] In some embodiments, the controller 820 can also be electrically connected to the welding torch 730 to be able to control the welding speed of the welding torch 730.

[0112] Refer to Figures 1 to 5 , in this application, when the staff welds the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11 through the welding equipment 20, the position of the rotary mechanism 500 can be adjusted first through the moving mechanism 400 so that the axis of the rotary shaft 530 is coaxial with the axis of the nozzle 12.

[0113] Then, by adjusting the first moving member 610, the second moving member 620, and the third moving member 630, the welding mechanism 700 is brought closer to the circumferential side of the nozzle 12, and by adjusting the rotating member 710, the welding end of the welding torch 730 is extended into the welding seam.

[0114] Finally, the rotary shaft 530 rotates to drive the adjusting mechanism 600 and the welding mechanism 700 to rotate. When the rotary shaft 530 rotates, the first moving member 610, the second moving member 620, and the third moving member 630 within the adjusting mechanism 600 can all move relatively, the rotating member 710 can rotate to adjust the angle between the welding torch 730 and the nozzle 12, and the arc-shaped plate 722 rotates relative to the fixed seat 721 to adjust the angle between the welding torch 730 and a partial arc segment at the intersection welding location, so that the welding end of the welding torch 730 moves along the welding seam, and the welding torch 730 can be inserted into the welding seam. The welding torch 730 can stably and efficiently melt the welding wire and weld it to the curved surface structure 11 and the nozzle 12, effectively improving the welding quality and the production efficiency of the workpiece to be welded.

[0115] The above embodiments are only illustrative examples of the structure. The structures in each embodiment are not fixedly combined structures. Without structural conflicts, the structures in multiple embodiments can be used in any combination. For example, the transmission structure between the first moving member 610 and the adjusting seat may further include a gear and a rack.

[0116] Figure 6 is a schematic flow chart of the welding method of the present invention.

[0117] Refer to Figure 6 , the present application also provides a submerged arc welding method, which uses a submerged arc welding equipment 20 to weld the curved surface structure 11 and the non-radial nozzle 12 on the curved surface structure 11.

[0118] The submerged arc welding method (hereinafter simply referred to as the welding method) includes:

[0119] Step S100, adjust the positions of the welding equipment 20, the curved surface structure 11 and the nozzle 12 so that the nozzle 12 is located on the side of the adjusting mechanism 600 provided on the rotating shaft 530.

[0120] Step S200, move the welding mechanism 700 through the adjusting mechanism 600 so that the welding mechanism 700 approaches the circumferential side wall of the nozzle 12.

[0121] Step S300, start the rotating member 710 to rotate it so that the welding end of the welding torch 730 moves to the intersection line.

[0122] Step S400, start the welding torch 730 to start welding; start the rotating shaft 530 so that the rotating shaft 530 drives the welding torch 730 to rotate around the axis of the nozzle 12, and the adjusting mechanism 600 and the rotating member 710 are started, so that the welding end of the welding torch 730 moves along the welding seam while welding.

[0123] When the welding equipment welds the workpiece to be welded, move the workpiece to be welded and the rotary mechanism 500 so that the rotating shaft 530 approaches the nozzle 12, and the nozzle 12 is located on the side of the adjusting mechanism 600 provided on the rotating shaft 530, thereby facilitating the welding equipment to process the workpiece to be welded and improving the welding efficiency and welding quality.

[0124] Move the welding mechanism 700 through the adjusting mechanism 600, and the rotating member 710 rotates so that the welding end of the welding torch 730 extends into the welding seam.

[0125] Start the rotating shaft 530, the adjusting mechanism 600 and the welding mechanism 700 so that the welding end of the welding torch 730 moves along the intersection line welding seam, so that the welding torch 730 melts the welding wire, the curved surface structure 11 and the nozzle 12, avoiding the breakage of the weld seam, improving the welding quality and improving the welding efficiency.

[0126] In some embodiments, the operator can use the moving mechanism 400 to coaxialize the rotation axis of the rotary shaft 530 with the axis of the connecting pipe 12.

[0127] Figure 7 It is a schematic flow chart of step S410 of the welding method of the present invention.

[0128] Refer to Figure 6 and Figure 7 In this embodiment, the welding mechanism 700 includes a declination adjustment assembly 720. Step S400 further includes step S410.

[0129] Step S410: When the rotary mechanism 500 drives the welding end of the welding torch 730 to rotate around the connecting pipe 12, the declination adjustment assembly 720 can adjust the angle between the welding torch 730 and the intersection line welding position, so that the welding end of the welding torch 730 can extend into the welding gap.

[0130] When the welding mechanism 700 rotates around the connecting pipe 12 to weld the welding gap, the declination adjustment assembly 720 can facilitate the welding torch 730 to extend into the welding gap, improve the quality of the molten pool formed after the melting of the curved surface structure 11, the welding wire and the connecting pipe 12, thereby effectively improving the welding quality and efficiency and reducing the welding cost.

[0131] In the related art, when submerged arc welding is used to weld a workpiece to be welded, under the action of gravity, the molten pool after the melting of the workpiece to be welded and the welding wire will flow downward, resulting in different surface shapes at each part of the weld, different welding qualities at each part of the weld, different stress bearing capacities of the weld, and poor welding quality of the workpiece to be welded.

[0132] Figure 8 It is a schematic flow chart of step S420 of the welding method of the present invention.

[0133] Refer to Figure 6 and Figure 8 In this embodiment, step S400 further includes step S420.

[0134] Step S420: When the welding torch 730 moves from top to bottom, the melting speed of the welding wire of the welding torch 730 gradually decreases; when the welding torch 730 moves from bottom to top, the melting speed of the welding wire of the welding torch 730 gradually increases.

[0135] When the welding torch 730 moves from top to bottom, the molten pool on the upper side will flow downward under the action of gravity. At this time, reducing the melting speed of the welding wire makes the number of melted welding wires in the welding gap from top to bottom gradually decrease. When the molten pool on the upper side flows downward, the excess melt on the upper side will be mixed with the less melt on the lower side, thereby ensuring the welding surface quality at each part and improving the welding quality and reliability of the workpiece to be welded.

[0136] When the welding torch 730 moves from bottom to top, gradually increase the wire melting speed of the welding torch 730, so that the number of wires melted by the welding torch 730 gradually increases when moving upward, and the molten pool with a larger volume on the upper side flows downward to the molten pool with a smaller volume on the lower side, thereby avoiding the problem of a thinner weld on the upper side and a thicker weld on the lower side, and ensuring the surface quality of the upper side and the lower side of the workpiece to be welded.

[0137] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A submerged arc welding equipment, characterized in that, There is an intersection curve between the curved surface structure and the non-radial nozzle on the curved surface structure, and the welding equipment is used to weld the welding seam where the intersection curve is located; the welding equipment includes: A carrier table; A rotary mechanism, which is arranged on the carrier table; the rotary mechanism includes a rotary shaft and a rotary driving part for driving the rotary shaft to rotate; the rotary shaft extends in a first direction; An adjusting mechanism, which has opposite first and second ends, the first end is connected to the free end of the rotary shaft, and the second end can move relative to the first end in a first direction, a second direction and a third direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other; A welding mechanism, which includes a rotating part and a welding torch, the rotating part is rotatably connected to the second end, the rotation axis of the rotating part is perpendicular to the first direction, and the rotating part can rotate around its own rotation axis; the welding torch is connected to the rotating part and can rotate following the rotating part; Wherein, when the welding mechanism welds the curved surface structure and the non-radial nozzle on the curved surface structure, the axial direction of the nozzle extends in the first direction and is located on one side of the rotary shaft where the adjusting mechanism is arranged.

2. The welding equipment according to claim 1, characterized in that The welding mechanism further includes a deflection angle adjusting component, which is connected between the rotating part and the welding torch, and the deflection angle adjusting component can drive the welding end of the welding torch to approach or move away from the rotating part; the deflection angle adjusting component can adjust the inclination angle of the welding torch at the welding position of the intersection curve so that the welding end of the welding torch can be inserted into the welding seam.

3. The welding equipment according to claim 2, characterized in that, The deflection angle adjusting component includes a fixed seat and an arc-shaped plate that are slidably connected, and the fixed seat is fixedly connected to the rotating part; the arc-shaped plate can slide relative to the fixed seat along its own extending direction, and the arc-shaped plate is fixedly connected to the welding torch.

4. The welding equipment according to claim 3, characterized in that, An arc-shaped groove is formed on one side of the arc-shaped plate facing the fixed seat, and the arc-shaped groove extends along the extending direction of the arc-shaped plate. The arc-shaped plate is slidably sleeved on the fixed seat through the arc-shaped groove; The deflection angle adjusting component further includes a skew gear, a skew motor and a rack. The skew gear is rotatably arranged on the fixed seat; the skew motor is arranged on the skew fixed seat and is in transmission connection with the skew gear; the rack is arranged on the arc-shaped plate and extends along the extending direction of the arc-shaped plate. The rack meshes with the skew gear so that the skew gear can drive the arc-shaped plate to slide relative to the fixed seat through the rack.

5. The welding equipment according to claim 3 or 4, characterized in that, The welding torch extends along the radial direction of the circle where the arc-shaped plate is located.

6. The welding equipment according to claim 1, characterized in that, The welding equipment includes a moving mechanism, and the moving mechanism includes: A column, which extends in the first direction and is arranged on the carrier table; A sliding seat, which is slidably connected to the column in the first direction so as to be able to drive the rotary mechanism to move in the first direction; A moving arm, which extends in the third direction, the moving arm is slidably arranged on the sliding seat in the third direction, and the moving arm can drive the rotary mechanism to move in the third direction; The adjusting fixing plate extends along the second direction, and the adjusting fixing plate is fixedly arranged at one end of the moving arm; the slewing mechanism is slidably connected to the adjusting fixing plate along the second direction.

7. The welding equipment according to claim 6, characterized in that, A rotating platform is further arranged at the lower end of the column, the rotating platform is movably connected to the bearing seat along the second direction, and the column is rotatably connected to the rotating platform around its own axis.

8. The welding equipment according to claim 1, characterized in that, The adjusting mechanism includes an adjusting seat, a first moving member, a second moving member and a third moving member, the adjusting seat is fixedly connected to the rotating shaft; the first moving member extends along the second direction, and the first moving member is movably connected to the adjusting seat along the second direction; the second moving member extends along the third direction, and the second moving member is movably connected to the first moving member along the third direction; The third moving member extends along the first direction, and the third moving member is movably connected to the second moving member along the first direction.

9. A submerged arc welding method, characterized in that, Using the submerged arc welding equipment according to any one of claims 1 to 8, it includes: Adjust the positions of the welding equipment, the curved surface structure and the nozzle, so that the nozzle is located on the side of the rotating shaft where the adjusting mechanism is arranged; Move the welding mechanism through the adjusting mechanism, so that the welding mechanism approaches the circumferential side wall of the nozzle; Start the rotating member to make it rotate, so that the welding end of the welding torch moves to the intersection line; Start the welding torch to start welding; Start the rotating shaft, so that the rotating shaft drives the welding torch to rotate around the axis of the nozzle, and the adjusting mechanism and the rotating member are started, so that the welding end of the welding torch moves along the welding seam while welding.

10. The welding method according to claim 9, characterized in that The welding mechanism includes a declination adjusting assembly; When the slewing mechanism drives the welding end of the welding torch to rotate around the nozzle, the declination adjusting assembly can adjust the angle between the welding torch and the welding part of the intersection line, so that the welding end of the welding torch can extend into the welding seam.

11. The welding method according to claim 10, characterized in that When the welding torch moves from top to bottom, the melting speed of the welding wire of the welding torch gradually decreases; When the welding torch moves from bottom to top, the melting speed of the welding wire of the welding torch gradually increases.

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