Welding equipment and welding method for single pile fan foundation

Abstract

The invention relates to the technical field of welding equipment, and discloses a welding equipment for a single pile fan foundation and a welding method thereof. The welding equipment for a single pile fan foundation comprises a base, on which a welding mechanism and a surrounding mechanism are arranged; the welding mechanism comprises a shell, on which a welding gun and a storage box are slidably arranged, the welding gun and the storage box are distributed along a rectangular gap formed by splicing two rectangular steel columns, the storage box is provided with an electromagnetic valve and a flux box, and the end of the welding gun is located in the flux box; the welding gun and the storage box are driven to move along the rectangular gap by the surrounding mechanism; the welding equipment for a single pile fan foundation and a welding method thereof can drive the welding equipment to circle around for welding based on two sections of steel structure, and position the welding equipment according to the specific sizes of different steel columns, and after positioning, a track groove equidistant from the surface contour of the steel column is formed, and the welding equipment is driven according to the track groove to keep in constant contact with the surface of the steel column for stable welding.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to welding equipment and a welding method thereof for a single pile wind turbine foundation. Background Art

[0002] A monopile wind turbine is a large wind turbine supported by a monopile steel structure. The monopile steel structure not only has to cope with its own weight, but also needs to withstand multiple challenges such as wind, waves, and ocean currents. In the welding process of the foundation steel structure of a monopile wind turbine, submerged arc welding technology is often used. Submerged arc welding is a welding method in which an arc burns under a flux layer. It has the advantages of stable welding quality, high welding productivity, no arc light, and little smoke.

[0003] However, in the prior art, submerged arc welding is generally only suitable for welds in horizontal positions or with small inclinations, which limits the welding operation. The welding equipment needs to be kept in place while adjusting the welding surfaces of the two sections of the steel structure to a horizontal position. Welding cannot be performed in a formed steel structure, causing inconvenience in production.

[0004] Therefore, in order to solve the above technical problems existing in the prior art, a welding device and a welding method for a single pile wind turbine foundation are proposed. Summary of the invention

[0005] The present invention provides a welding device and a welding method for a single pile wind turbine foundation. The device can be driven by two sections of steel structure to weld in a circle, and the steel columns are positioned according to the specific sizes of different steel columns. After positioning, a trajectory groove equidistant from the surface contour of the steel column is formed. The welding device is driven according to the trajectory groove to keep in contact with the surface of the steel column to perform stable welding. The invention solves the problem that in the prior art mentioned in the above background technology, submerged arc welding is generally only suitable for welds in a horizontal position or with a small inclination, which limits the welding operation. The welding device needs to remain in a fixed position while adjusting the welding surfaces of the two sections of steel structure to a horizontal position, and welding cannot be performed in a formed steel structure, causing inconvenience in production.

[0006] The present invention provides the following technical solutions: a welding device for a monopile fan foundation, a welding device for a monopile fan foundation, used for welding two rectangular steel columns, the welding device for a monopile fan foundation comprising a base, the base being provided with a welding mechanism and a surrounding mechanism;

[0007] The welding mechanism comprises a shell, a welding gun and a storage box are slidably arranged on the shell, the welding gun and the storage box are distributed along a rectangular gap formed by splicing two rectangular steel columns, a solenoid valve and a flux box are arranged on the storage box, and the end of the welding gun is located in the flux box;

[0008] The welding gun and the storage box are driven to move along the rectangular gap by the circumferential mechanism. During the moving process, the storage box is located at the front side of the moving direction. The flux is filled into the flux box through the storage box, and welding is performed by the welding gun.

[0009] As an optional solution of the welding equipment for a single pile wind turbine foundation described in the present invention, the welding mechanism also includes a wire feeding assembly, the wire feeding assembly includes a winding drum rotatably arranged on the shell, a welding wire is wound on the winding drum, and the welding wire is slidably connected to the welding gun.

[0010] As an optional solution of the welding equipment for a monopile wind turbine foundation of the present invention, the wire feeding assembly further comprises two rotating shafts rotatably arranged in the housing, both rotating shafts are provided with wire feeding wheels, and the welding wire passes between the two wire feeding wheels;

[0011] A first motor is also disposed in the housing, an output shaft of the first motor is connected to one of the rotating shafts, and first gears are disposed on both rotating shafts, and the two first gears are meshed;

[0012] The two wire feeding wheels are driven by the first motor to rotate in opposite directions, so that the welding wire is fed toward the end of the welding gun.

[0013] As an optional solution of the welding equipment for a single pile wind turbine foundation described in the present invention, an air pump is also provided on the storage box, a control box is provided on the shell, two wires are provided on the control box, one of the wires is connected to the welding gun, and the other wire is connected to one of the rectangular steel columns.

[0014] As an optional solution of the welding equipment for a single pile wind turbine foundation of the present invention, wherein: two positioning mechanisms are symmetrically arranged on the base, and the two positioning mechanisms are used to fix the base on the two rectangular steel columns;

[0015] The positioning mechanism comprises a first L-shaped block, two ends of which are slidably provided with a second L-shaped block and a third L-shaped block, and the positioning mechanism further comprises a fourth L-shaped block, two ends of which are slidably provided with the second L-shaped block and the third L-shaped block;

[0016] A retractable rectangular structure is formed by the first L-shaped block, the second L-shaped block, the third L-shaped block and the fourth L-shaped block to fix the rectangular steel column, and another of the wires is connected to one of the first L-shaped blocks.

[0017] As an optional solution of the welding equipment for a monopile wind turbine foundation of the present invention, wherein: the first L-shaped block, the second L-shaped block, the third L-shaped block and the fourth L-shaped block are all provided with L-shaped grooves;

[0018] When the first L-shaped block, the second L-shaped block, the third L-shaped block and the fourth L-shaped block are respectively fitted with the four sides of the rectangular steel column, the four L-shaped grooves form a rectangular groove equidistant from the outline of the rectangular steel column;

[0019] The welding gun and the storage box are both provided with guide rods, and the two guide rods are both slidably connected in the rectangular groove formed by the four L-shaped grooves.

[0020] As an optional solution of the welding equipment for a single pile wind turbine foundation described in the present invention, the first L-shaped block is arranged on the base, the positioning mechanism also includes a fixing assembly, the fixing assembly includes a bolt, the bolt is threadedly connected to the base and the fourth L-shaped block, and a nut is also threadedly connected to the bolt.

[0021] As an optional solution of the welding equipment for a single pile wind turbine foundation described in the present invention, the surrounding mechanism includes a first arc-shaped bracket arranged on the base, a second arc-shaped bracket is slidably arranged on the first arc-shaped bracket, a third arc-shaped bracket is slidably arranged on the second arc-shaped bracket, and the shell is arranged on the third arc-shaped bracket.

[0022] As an optional solution of the welding equipment for a monopile wind turbine foundation of the present invention, wherein: a second motor is arranged on the first arc-shaped bracket, a second gear is arranged on the output shaft of the second motor, and a first gear ring and a third motor are arranged on the second arc-shaped bracket;

[0023] The second gear is meshed with the first gear ring, a third gear is arranged on the output shaft of the third motor, a second gear ring is arranged on the third arc-shaped bracket, and the third gear is meshed with the second gear ring.

[0024] The present invention also provides the following technical solution: a welding method for welding equipment for a single pile wind turbine foundation, comprising the following steps:

[0025] S1. After aligning the first L-shaped block with a right-angled side of the rectangular steel column, assemble the second L-shaped block, the third L-shaped block and the fourth L-shaped block with the first L-shaped block, and adjust the second L-shaped block, the third L-shaped block and the fourth L-shaped block to fit with the other three right-angled sides of the rectangular steel column respectively, and then fix the fourth L-shaped block by adjusting the bolts and nuts;

[0026] S2. The second gear and the third motor are operated in sequence to make the shell move along the rectangular gap. During the movement, the flux box remains in contact with the surface of the rectangular gap, the air pump is operated to fill the flux in the storage box into the flux box, the first motor is operated to transport the welding wire to the end of the welding gun, and the control box is operated to energize the welding gun and the rectangular steel column, thereby welding the two rectangular steel columns.

[0027] The present invention has the following beneficial effects:

[0028] 1. The welding equipment and welding method for the single pile wind turbine foundation can be used for welding two sections of rectangular steel columns by submerged arc welding at any place inside the semi-formed single pile wind turbine foundation steel structure that has just been constructed, which solves the problem that the submerged arc welding technology is not suitable for welding in places other than horizontal welds, and improves the production convenience of submerged arc welding. First, the base is fixed on the two rectangular steel columns by two positioning mechanisms, and then the welding mechanism is driven by the surrounding mechanism to move around the rectangular gap. During the movement, the air pump is used to ensure that the flux can be transported into the flux box in the vertical direction, horizontal direction, and reverse direction, and the welding gun, welding wire and flux are all located in the flux box with an opening on the bottom surface. The bottom opening of the flux box is kept in contact with the surface of the rectangular steel column, so that welding can be performed in the vertical direction, horizontal direction, and reverse direction.

[0029] 2. The welding equipment and welding method for the single pile wind turbine foundation are fixed by four detachable L-shaped blocks fitting with the four surfaces of the rectangular steel column during positioning. L-shaped grooves are provided on the four L-shaped blocks, and the four L-shaped grooves constitute a retractable rectangular groove, which is equidistant from the surface contour of the rectangular steel column after positioning. The welding gun and the storage box are not fixedly installed in the shell, but can slide, and then the welding gun and the storage box are guided to move along the rectangular groove by two guide rods to keep the flux box always fitting with the surface of the rectangular steel column. And it is realized that the positioning can be freely adjusted according to the specific size and model of the rectangular steel column, and the rectangular groove used to guide the moving trajectory of the welding mechanism can be freely adjusted.

[0030] 3. The welding device and welding method for the single pile wind turbine foundation, the surrounding mechanism used to drive the welding mechanism to surround the rectangular gap in a circle according to the rectangular track, is composed of three sections of retractable arc structures. The positioning mechanism is also detachable, so the whole device can be assembled on the side of the two sections of rectangular steel columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a schematic diagram of a first partial cross-sectional structure of the present invention.

[0033] Figure 3for Figure 2 A partial enlarged view of point A in the middle.

[0034] Figure 4 It is a second partial cross-sectional structural schematic diagram of the present invention.

[0035] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0036] Figure 6 It is a third partial cross-sectional structural schematic diagram of the present invention.

[0037] Figure 7 It is a schematic diagram of the explosion structure of the welding mechanism in the present invention.

[0038] Figure 8 for Figure 7 A partial enlarged view of point C in the middle.

[0039] Fig. 9 It is a schematic diagram of the exploded structure of the positioning mechanism in the present invention.

[0040] Fig.10 It is a structural schematic diagram of the surrounding mechanism in the present invention.

[0041] Fig.11 It is a schematic diagram of the explosion structure of the surrounding mechanism in the present invention.

[0042] In the figure: 100, rectangular steel column; 110, rectangular gap; 200, base; 300, welding mechanism; 310, housing; 320, welding gun; 330, wire feeding assembly; 331, winding drum; 332, welding wire; 333, rotating shaft; 334, wire feeding wheel; 335, first motor; 336, first gear; 340, storage box; 350, solenoid valve; 360, flux box; 370, air pump; 380, control box; 390, wire; 400, positioning mechanism; 410, first L-shaped block; 420 , second L-shaped block; 430, third L-shaped block; 440, fourth L-shaped block; 450, L-shaped groove; 460, guide rod; 470, slider; 480, slide groove; 490, fixing assembly; 491, bolt; 492, nut; 500, surrounding mechanism; 510, first arc-shaped bracket; 520, second arc-shaped bracket; 530, third arc-shaped bracket; 540, second motor; 550, second gear; 560, first ring gear; 570, third motor; 580, third gear; 590, second ring gear. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] For example, see Figure 1-Figure 8 , a welding device for a monopile wind turbine foundation, used for welding two rectangular steel columns 100, the welding device for a monopile wind turbine foundation comprises a base 200, and a welding mechanism 300 and a surrounding mechanism 500 are arranged on the base 200;

[0045] The welding mechanism 300 includes a housing 310, on which a welding gun 320 and a storage box 340 are slidably arranged. The welding gun 320 and the storage box 340 are distributed along a rectangular gap 110 formed by splicing two rectangular steel columns 100. The storage box 340 is provided with a solenoid valve 350 and a flux box 360, and the end of the welding gun 320 is located in the flux box 360.

[0046] The welding gun 320 and the storage box 340 are driven to move along the rectangular gap 110 by the surrounding mechanism 500. During the moving process, the storage box 340 is located at the front side of the moving direction. The flux is filled into the flux box 360 through the storage box 340, and the welding gun 320 performs welding.

[0047] The welding mechanism 300 further includes a wire feeding assembly 330, which includes a winding drum 331 rotatably disposed on the housing 310, a welding wire 332 wound on the winding drum 331, and the welding wire 332 is slidably connected to the welding gun 320;

[0048] The wire feeding assembly 330 further includes two rotating shafts 333 rotatably disposed in the housing 310 , and wire feeding wheels 334 are disposed on the two rotating shafts 333 , and the welding wire 332 passes between the two wire feeding wheels 334 ;

[0049] A first motor 335 is further disposed in the housing 310 , and an output shaft of the first motor 335 is connected to one of the rotating shafts 333 , and first gears 336 are disposed on both rotating shafts 333 , and the two first gears 336 are meshed;

[0050] The two wire feeding wheels 334 are driven to rotate in opposite directions by the first motor 335, so as to feed the welding wire 332 toward the end of the welding gun 320;

[0051] An air pump 370 is also provided on the storage box 340 , a control box 380 is provided on the housing 310 , and two wires 390 are provided on the control box 380 , one of the wires 390 is connected to the welding gun 320 , and the other wire 390 is connected to one of the rectangular steel columns 100 .

[0052] In this embodiment: Submerged arc welding is usually only applicable to the welding of horizontal welds, so it is necessary to use welding equipment as a site, adjust the two sections of rectangular steel columns 100 to be welded on the welding equipment, and adjust the four sides of the rectangular weld to the horizontal position in turn for welding. If it is necessary to weld the two sections of rectangular steel columns 100 in the foundation steel structure of a large semi-formed single pile wind turbine, it cannot be achieved by relying on existing submerged arc welding equipment.

[0053] Therefore, the base 200 is used as the base of the welding equipment, and the two ends of the base 200 are respectively connected to the two sections of rectangular steel columns 100 through two positioning mechanisms 400 for basic fixation. Then the welding mechanism 300 moves clockwise along the rectangular track of the rectangular gap 110 for welding.

[0054] During welding, the storage box 340 is located at the front side of the traveling direction. Considering that the storage box 340 will rotate to a horizontal and inverted position, it is not suitable to rely on gravity alone to send the flux in the storage box 340. Instead, a miniature air pump 370 is installed on the storage box 340. The air pump 370 is used to pneumatically transport the flux powder into the flux box 360. The types of flux and welding wire 332 are selected according to the rectangular steel column 100.

[0055] The flux box 360 moves with the storage box 340. The flux box 360 is in the shape of a rectangular box with no cover on the bottom. It can keep in contact with the surface of the rectangular steel column 100 during the movement. A small amount of flux will leak at the right-angle transition, but it will not affect the overall welding process. There is a gap between the flux box 360 and the welding gun 320. The welding gun 320 can also be connected to the flux box 360 through a bellows, thereby reducing the flux from flowing out of the gap between the flux box 360 and the welding gun 320.

[0056] At the same time, as the welding gun 320 and the storage box 340 move, the operation of the first motor 335 can drive the two wire feeding wheels 334 to rotate in opposite directions, and continuously feed the winding drum 331 toward the welding gun 320. At the same time, the control box 380 controls the two ends of the power supply to be connected to the welding gun 320 and the rectangular steel column 100 respectively, and the continuously fed welding wire 332 generates an arc between the rectangular steel column 100 and the flux layer. The heat of the arc melts the welding wire 332, the rectangular steel column 100 and the flux to form a metal molten pool, which is isolated from the air. The molten pool is then cooled and solidified to form a weld.

[0057] Embodiment 2: This embodiment is an improvement on Embodiment 1. For details, please refer to Figure 1-Figure 9 , two positioning mechanisms 400 are symmetrically arranged on the base 200, and the two positioning mechanisms 400 are used to fix the base 200 on the two rectangular steel columns 100;

[0058] The positioning mechanism 400 includes a first L-shaped block 410, and two ends of the first L-shaped block 410 are respectively slidably provided with a second L-shaped block 420 and a third L-shaped block 430. The positioning mechanism 400 also includes a fourth L-shaped block 440, and two ends of the fourth L-shaped block 440 are respectively slidably provided on the second L-shaped block 420 and the third L-shaped block 430.

[0059] A retractable rectangular structure is formed by a first L-shaped block 410, a second L-shaped block 420, a third L-shaped block 430 and a fourth L-shaped block 440 to fix the rectangular steel column 100, and another wire 390 is connected to one of the first L-shaped blocks 410;

[0060] The first L-shaped block 410 , the second L-shaped block 420 , the third L-shaped block 430 and the fourth L-shaped block 440 are all provided with an L-shaped groove 450 ;

[0061] When the first L-shaped block 410, the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 are respectively fitted with the four sides of the rectangular steel column 100, the four L-shaped grooves 450 form a rectangular groove equidistant from the outline of the rectangular steel column 100;

[0062] The welding gun 320 and the storage box 340 are both provided with guide rods 460, and the two guide rods 460 are both slidably connected in the rectangular groove formed by the four L-shaped grooves 450;

[0063] The first L-shaped block 410 is disposed on the base 200 . The positioning mechanism 400 further includes a fixing assembly 490 . The fixing assembly 490 includes a bolt 491 . The bolt 491 is threadedly connected to the base 200 and the fourth L-shaped block 440 . A nut 492 is also threadedly connected to the bolt 491 .

[0064] In this embodiment: considering that welding must be carried out at any location in the single pile wind turbine steel structure in a non-ground location, the base 200, the positioning mechanism 400 and the surrounding mechanism 500 cannot be a complete ring, rectangular or other structure, so that the installation can be completed on the sides of the two rectangular steel columns 100.

[0065] Accordingly, the first L-shaped block 410 is installed on the base 200, and the first L-shaped block 410 can be aligned with a right angle of the rectangular steel column 100 so that the two inner sides of the first L-shaped block 410 are aligned with the two right angle sides of the rectangular steel column 100, and then Fig. 9The detachable second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 are assembled so that the fourth L-shaped block 440 is aligned with another right angle on the diagonal of the rectangular steel column 100, and finally the inner rectangular contours of the first L-shaped block 410, the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 are matched with the contour of the rectangular steel column 100.

[0066] During this process, the four sliders 470 installed on the first L-shaped block 410, the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 slide along the four slide grooves 480 respectively. After the first L-shaped block 410, the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 are matched with the four sides of the rectangular steel column 100, the bolts 491 can be installed to connect the fourth L-shaped block 440 and the base 200, and then the nuts 492 are screwed on to fix the position of the fourth L-shaped block 440, so that the positions of the first L-shaped block 410, the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 are all fixed.

[0067] At this time, the four L-shaped grooves 450 are connected to form a rectangular groove equidistant from the outline of the rectangular steel column 100, and the welding gun 320 and the storage box 340 are both limited in the rectangular groove by the guide rod 460. When the driving housing 310 as a whole circles around the rectangular steel column 100, the welding gun 320 and the storage box 340 will slide along the housing 310 respectively under the guidance of the two guide rods 460, so that the welding gun 320 is always vertically aligned with the surface of the rectangular steel column 100, and the flux box 360 also keeps in contact with the surface of the rectangular steel column 100.

[0068] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 1-Figure 11 The surrounding mechanism 500 includes a first arc-shaped bracket 510 disposed on the base 200, a second arc-shaped bracket 520 is slidably disposed on the first arc-shaped bracket 510, a third arc-shaped bracket 530 is slidably disposed on the second arc-shaped bracket 520, and the housing 310 is disposed on the third arc-shaped bracket 530;

[0069] The first arc-shaped bracket 510 is provided with a second motor 540 , the output shaft of the second motor 540 is provided with a second gear 550 , and the second arc-shaped bracket 520 is provided with a first gear ring 560 and a third motor 570 ;

[0070] The second gear 550 is meshed with the first ring gear 560 . The third gear 580 is disposed on the output shaft of the third motor 570 . The third arc-shaped bracket 530 is provided with a second ring gear 590 . The third gear 580 is meshed with the second ring gear 590 .

[0071] In this embodiment, the surrounding mechanism 500 cannot be a complete circular ring structure, but needs to be a retractable arc structure. The first arc bracket 510 installed on the base 200, the second arc bracket 520 slidably installed on the first arc bracket 510, and the third arc bracket 530 slidably installed on the second arc bracket 520 constitute a retractable arc structure. The housing 310 is installed on the third arc bracket 530.

[0072] The second motor 540 drives the second gear 550 to rotate clockwise, which can drive the arc-shaped first gear ring 560 to slide clockwise, thereby driving the second arc-shaped bracket 520 to extend in the clockwise direction relative to the first arc-shaped bracket 510.

[0073] The third motor 570 drives the third gear 580 to rotate clockwise, which can drive the arc-shaped second gear ring 590 to slide clockwise, thereby driving the third arc-shaped bracket 530 and the shell 310 to extend in the clockwise direction relative to the second arc-shaped bracket 520.

[0074] For details, please refer to Example 4. Figure 1-Figure 11 , a welding method for welding equipment for a single pile wind turbine foundation, comprising the following steps:

[0075] S1. After aligning the first L-shaped block 410 with a right-angled side of the rectangular steel column 100, assemble the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 with the first L-shaped block 410, and adjust the second L-shaped block 420, the third L-shaped block 430 and the fourth L-shaped block 440 to fit the other three right-angled sides of the rectangular steel column 100 respectively, and then fix the fourth L-shaped block 440 by adjusting the bolts 491 and the nuts 492;

[0076] S2. The second gear 550 and the third motor 570 are operated in sequence to make the shell 310 move along the rectangular gap 110. During the movement, the flux box 360 remains in contact with the surface of the rectangular gap 110. The air pump 370 is operated to fill the flux in the storage box 340 into the flux box 360. The first motor 335 is operated to transport the welding wire 332 to the end of the welding gun 320. The control box 380 is operated to energize the welding gun 320 and the rectangular steel column 100, thereby welding the two rectangular steel columns 100.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A welding device for a monopile wind turbine foundation, used for welding two rectangular steel columns (100), characterized in that: The welding equipment for a monopile wind turbine foundation comprises a base (200), on which a welding mechanism (300) and a surrounding mechanism (500) are arranged; The welding mechanism (300) comprises a housing (310), a welding gun (320) and a storage box (340) are slidably arranged on the housing (310), the welding gun (320) and the storage box (340) are distributed along a rectangular gap (110) formed by splicing two rectangular steel columns (100), a solenoid valve (350) and a flux box (360) are arranged on the storage box (340), and the end of the welding gun (320) is located in the flux box (360); The welding gun (320) and the storage box (340) are driven to move along the rectangular gap (110) by the surrounding mechanism (500); during the moving process, the storage box (340) is located at the front side of the moving direction; the flux is filled into the flux box (360) by the storage box (340), and welding is performed by the welding gun (320); An air pump (370) is also provided on the storage box (340), a control box (380) is provided on the housing (310), and two wires (390) are provided on the control box (380), one of the wires (390) is connected to the welding gun (320), and the other wire (390) is connected to one of the rectangular steel columns (100); Two positioning mechanisms (400) are also symmetrically arranged on the base (200), and the two positioning mechanisms (400) are used to fix the base (200) on the two rectangular steel columns (100); The positioning mechanism (400) comprises a first L-shaped block (410), with a second L-shaped block (420) and a third L-shaped block (430) being slidably disposed at two ends of the first L-shaped block (410), and the positioning mechanism (400) further comprises a fourth L-shaped block (440), with two ends of the fourth L-shaped block (440) being slidably disposed on the second L-shaped block (420) and the third L-shaped block (430); A retractable rectangular structure is formed by the first L-shaped block (410), the second L-shaped block (420), the third L-shaped block (430) and the fourth L-shaped block (440) to fix the rectangular steel column (100), and another of the wires (390) is connected to one of the first L-shaped blocks (410); The first L-shaped block (410), the second L-shaped block (420), the third L-shaped block (430) and the fourth L-shaped block (440) are all provided with an L-shaped groove (450); When the first L-shaped block (410), the second L-shaped block (420), the third L-shaped block (430) and the fourth L-shaped block (440) are respectively attached to the four sides of the rectangular steel column (100), the four L-shaped grooves (450) form a rectangular groove equidistant from the outline of the rectangular steel column (100); The welding gun (320) and the storage box (340) are both provided with guide rods (460), and the two guide rods (460) are both slidably connected in a rectangular groove formed by the four L-shaped grooves (450).

2. The welding equipment for a monopile wind turbine foundation according to claim 1, characterized in that: The welding mechanism (300) further comprises a wire feeding assembly (330), wherein the wire feeding assembly (330) comprises a winding drum (331) rotatably arranged on the housing (310), a welding wire (332) being wound around the winding drum (331), and the welding wire (332) being slidably connected to the inside of the welding gun (320).

3. A welding device for a monopile wind turbine foundation according to claim 2, characterized in that: The wire feeding assembly (330) further comprises two rotating shafts (333) rotatably disposed in the housing (310), and wire feeding wheels (334) are disposed on the two rotating shafts (333), and the welding wire (332) passes between the two wire feeding wheels (334); A first motor (335) is further disposed in the housing (310); an output shaft of the first motor (335) is connected to one of the rotating shafts (333); first gears (336) are disposed on both rotating shafts (333); and the two first gears (336) are meshed; The two wire feeding wheels (334) are driven to rotate in opposite directions by the first motor (335), thereby conveying the welding wire (332) toward the end of the welding gun (320).

4. The welding equipment for a monopile wind turbine foundation according to claim 3, characterized in that: The first L-shaped block (410) is arranged on the base (200), and the positioning mechanism (400) further comprises a fixing assembly (490), wherein the fixing assembly (490) comprises a bolt (491), wherein the bolt (491) is threadedly connected to the base (200) and the fourth L-shaped block (440), and a nut (492) is also threadedly connected to the bolt (491).

5. The welding equipment for a monopile wind turbine foundation according to claim 4, characterized in that: The surrounding mechanism (500) comprises a first arc-shaped bracket (510) arranged on the base (200), a second arc-shaped bracket (520) being slidably arranged on the first arc-shaped bracket (510), a third arc-shaped bracket (530) being slidably arranged on the second arc-shaped bracket (520), and the housing (310) being arranged on the third arc-shaped bracket (530).

6. A welding device for a monopile wind turbine foundation according to claim 5, characterized in that: The first arc-shaped bracket (510) is provided with a second motor (540), the output shaft of the second motor (540) is provided with a second gear (550), and the second arc-shaped bracket (520) is provided with a first gear ring (560) and a third motor (570); The second gear (550) is meshed with the first gear ring (560), a third gear (580) is arranged on the output shaft of the third motor (570), a second gear ring (590) is arranged on the third arc-shaped bracket (530), and the third gear (580) is meshed with the second gear ring (590).

7. A welding method for welding equipment for a monopile wind turbine foundation according to claim 6, characterized in that: The steps include: S1. After aligning the first L-shaped block (410) with a right-angled side of the rectangular steel column (100), assembling the second L-shaped block (420), the third L-shaped block (430) and the fourth L-shaped block (440) with the first L-shaped block (410), and adjusting the second L-shaped block (420), the third L-shaped block (430) and the fourth L-shaped block (440) so as to fit the other three right-angled sides of the rectangular steel column (100), respectively, and then fixing the fourth L-shaped block (440) by adjusting the bolts (491) and the nuts (492); S2, the second gear (550) and the third motor (570) are operated in sequence to make the shell (310) move along the rectangular gap (110). During the movement, the flux box (360) remains in contact with the surface of the rectangular gap (110), the air pump (370) is operated to fill the flux in the storage box (340) into the flux box (360), the first motor (335) is operated to transport the welding wire (332) to the end of the welding gun (320), and the control box (380) is operated to energize the welding gun (320) and the rectangular steel column (100), thereby welding the two rectangular steel columns (100).

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