A method for welding a lifting lug of a wind power single pile

Abstract

The present invention provides a method for welding a lifting ear of a wind power single pile, the method uses the following device, the device comprising: a gantry, a tower movable channel is formed in the middle of the frame bodies on both sides of the gantry, an equipment installation platform is lifted and lowered on the gantry, and the lifting ear is sent into the welding area through the workpiece lifting hole; a welding device, the welding device is an automated welding robot arm, several of the telescopic holes are telescopically inserted with enclosing airbag rods, and several of the enclosing airbags are squeezed against each other and enclosed with the lifting ear during the expansion process to form an annular airbag compartment. The present invention solves the problem that the granular flux cannot adhere to the surface of the tower arc ramp by forming an annular airbag compartment around the weld and evenly laying granular flux in the annular airbag compartment, so that the lifting ear welding can also adopt the welding form of submerged arc welding, reducing the spatter and sparks generated during the welding process, reducing the possibility of welding deformation, and improving the welding quality.

Description

[0001] This application is a divisional application of application number 2024100311837, application date January 9, 2024, and invention name “A wind power single pile lifting ear welding device”. Technical Field

[0002] The invention relates to the technical field of tower submerged arc welding devices, in particular to a wind power single pile lifting ear welding method. Background Art

[0003] A combined submerged arc welding device with a publication number of "CN106624293B" in the prior art comprises a submerged arc welding machine, a bidirectional adjustment frame and a roller frame for supporting a large-diameter steel pipe, wherein the bidirectional adjustment frame comprises a machine base, a column and a rocker arm, the rocker arm is arranged in a horizontal direction, and its end is connected to the column by sliding and rotation and is positioned by a locking bolt, the submerged arc welding machine is installed on the rocker arm through a support plate, and the support plate is connected to the rocker arm by sliding and rotation and is positioned by a locking bolt; the submerged arc welding machine comprises a welding machine control box, a submerged arc welding machine head and a welding wire reel which are installed on the support plate through a welding machine crossbeam, and is electrically connected to an external submerged arc welding machine host through a wire, and a method for butt welding a large-diameter steel pipe comprises assembling a combined submerged arc welding device, hoisting the large-diameter steel pipe and welding, the submerged arc welding device is easy to install, disassemble and carry, has a reasonable structure and strong adaptability: it can be applied to butt welding of steel pipes with diameter specifications ranging from 500mm to 2000mm, the method is simple to operate, easy to promote and has reliable quality.

[0004] Although the above-mentioned device realizes the submerged arc welding operation on the surface of large-diameter steel pipes, the above-mentioned combined submerged arc welding device still has obvious defects during use: the above-mentioned device adjusts the angle of the large-diameter steel pipe while welding, so that the weld position is always in an approximately flat position at the top. When submerged arc welding is performed in this area, the particle welder is not easy to slip, so that the weld area can be effectively buried. However, when it is necessary to install a lifting lug on the large-diameter steel pipe, the welding operation of the lifting lug requires that the entire welding process is continuous and the position of the steel pipe remains unchanged. At this time, due to the influence of the arc slope at both ends of the large-diameter steel pipe, it is difficult for the particle welder to attach to it, resulting in the welding of this area cannot be done by submerged arc welding. This problem has always plagued the lifting lug welding operation process, and it can only be forced to use argon arc welding as a substitute. Summary of the invention

[0005] The object of the present invention is to provide a method for welding a wind power monopile lifting lug to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wind power monopile lifting lug welding method, the method using the following device, the device comprising:

[0008] A gantry, wherein a tower activity channel is formed in the middle of the frame bodies on both sides of the gantry, an equipment installation platform is provided on the gantry in a lifting manner, a welding device is installed on the equipment installation platform, and workpiece lifting holes are provided in the middle of the gantry and the equipment installation platform, through which the lifting lugs are sent into the welding area;

[0009] A welding device, wherein the welding device is an automated welding robot arm, a submerged arc welding head is installed at the end of the automated welding robot arm, the automated welding robot arm is installed in a translational sliding manner on an X-axis sliding beam, and both ends of the X-axis sliding beam cooperate with a Y-axis translation guide rail through a translation slider;

[0010] A roller frame is arranged below the tower movable channel, and the tower is lifted by the roller frame, and,

[0011] A submerged arc device, the submerged arc device includes an annular matching enclosure, the annular matching enclosure is coaxially arranged with the lifting ear in a horizontal welding state, the lifting ear and the annular matching enclosure are separated to form a welding operation space for inserting a submerged arc welding joint, the annular matching enclosure is fixedly connected to a flip movable arm, the flip movable arm is fixedly connected to a flip shaft at one end away from the annular matching enclosure, the flip shaft is movably installed at the bottom of the equipment installation platform, the flip shaft performs a 90° flip movement under the drive of a flip driving device, a plurality of telescopic holes are opened in an annular array on the annular matching enclosure, and enclosing airbag rods are telescopically inserted into the plurality of telescopic holes. The enclosed airbag rod is against the outer sleeve of one side of the tower tube, and a plurality of the enclosed airbag rods are provided with gas inlet and outlet holes connected to the enclosed airbag. A plurality of the gas inlet and outlet holes are connected to the inlet and outlet air pumps installed on the equipment installation platform through pump air pipelines. The operation of the inlet and outlet air pumps causes the enclosed airbags to expand or contract. During the expansion process, the plurality of enclosed airbags are squeezed against each other and enclosed with the lifting ears to form an annular airbag compartment. By evenly laying granular flux in the annular airbag compartment, the submerged arc welding joint of the automated welding robot arm is in the granular flux layer during the welding process, thereby realizing the submerged arc welding operation on the surface of the arc-shaped workpiece.

[0012] Preferably, when the annular mating enclosure is in a horizontal welding state, several enclosing airbags on both sides of the tower width extension direction are located on one side of the annular airbag compartment and are provided with a granular flux release port, the granular flux release port is connected with a granular release channel opened in the enclosing airbag rod, several of the granular release channels are connected with a granular pump through a release pipe, the granular pump is connected with a granular flux collecting cabin, the granular flux is released to the annular airbag compartment through the granular flux release port by the granular pump, and in the process of releasing the granular flux to the annular airbag compartment at the granular flux release port, the tower is driven by the power of the roller frame to rotate back and forth around the axis to disperse the granular flux to both sides until the entire annular airbag compartment is covered, thereby ensuring that the weld position is inside the granular flux layer.

[0013] Preferably, when the annular mating enclosure is in a horizontal welding state, a plurality of the enclosed airbags located on both sides of the tower length extension direction are further provided with granular flux collecting grooves, the granular flux collecting grooves face one side of the annular airbag compartment, and the granular flux spread in the annular airbag compartment slides down during the reciprocating rotation of the tower around the axis to both sides, and finally enters the granular flux collecting groove, and a negative pressure adsorption port is further provided at the bottom of the enclosed airbag rod in the granular flux collecting groove, the negative pressure adsorption port is connected with a particle recovery path opened in the enclosed airbag rod, and the particle recovery paths of the plurality of the enclosed airbag rods are connected with a negative pressure pump through a recovery pipe, and the negative pressure pump recovers the granular flux into the granular flux collection cabin.

[0014] Preferably, the number of the annular mating enclosures is three, and the three annular mating enclosures are arranged in an axially overlapping manner in a horizontal welding state.

[0015] Preferably, the bottom of the roller frame is also fixedly mounted on a displacement slider, and the displacement slider cooperates with the translation slide rail.

[0016] Preferably, the automated welding robot arm is also equipped with a wire supply turntable, which continuously pushes welding wire to the submerged arc welding joint. A wire reel seat is also installed on the equipment mounting platform, and the welding wire on the wire reel seat is wound on the wire supply turntable through a wire supply rack.

[0017] Preferably, an equipment control device is also installed on the equipment installation platform.

[0018] Preferably, the device for driving the extension and retraction of the plurality of enclosed airbag rods is a pneumatic telescopic cylinder, the number of the plurality of pneumatic telescopic cylinders is consistent with the number of enclosed airbag rods and they correspond one to one, the plurality of pneumatic telescopic cylinders are connected to a pneumatic telescopic master cylinder through a pipeline, and the extension and retraction of the pneumatic telescopic master cylinder drives the extension and retraction of the plurality of pneumatic telescopic cylinders.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention solves the problem that the granular flux cannot adhere to the surface of the tower arc ramp by forming an annular airbag compartment around the weld and evenly laying the granular flux in the annular airbag compartment, so that the lug welding can also adopt the submerged arc welding form, reducing the spatter and sparks generated during the welding process, reducing the possibility of welding deformation, and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic side view of the overall structure of the present invention;

[0023] Figure 3 It is a schematic top view of the overall structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure of the equipment installation platform of the present invention;

[0025] Figure 5 It is a schematic diagram of the submerged arc welding joint extending to the granular flux layer for welding of the weld according to the present invention;

[0026] Figure 6 A schematic diagram of the location of the particle flux collecting tank and the particle flux releasing port of the present invention;

[0027] Figure 7 It is a schematic diagram of annular matching enclosures of various sizes according to the present invention;

[0028] Figure 8 It is a schematic diagram of the position of the negative pressure adsorption port of the present invention;

[0029] Fig. 9 It is a schematic diagram of the position of the particle flux release port of the present invention;

[0030] Fig.10 It is a schematic diagram of the connection between the gas inlet and outlet holes and the inlet and outlet gas pumps of the present invention;

[0031] Fig.11 It is a schematic diagram of the connection between the particle recovery channel and the particle flux collection chamber of the present invention;

[0032] Fig.12 It is a schematic diagram of the connection between the particle release channel and the particle flux collection chamber of the present invention.

[0033] In the figure: 1 gantry, 2 tower movable channel, 3 equipment installation platform, 4 workpiece lifting hole, 5 lifting lug, 6 automated welding robot arm, 7 submerged arc welding joint, 8 X-axis sliding beam, 9 translation slider, 10 Y-axis translation guide rail, 11 roller frame, 12 tower, 13 annular matching enclosure, 14 welding operation space, 15 flip movable arm, 16 flip axis, 17 telescopic hole, 18 enclosed airbag rod, 19 enclosed airbag, 20 gas inlet and outlet hole, 21 Annular air bag compartment, 22 particle flux release port, 23 particle release channel, 24 release pipeline, 25 particle pumping machine, 26 particle flux collection cabin, 27 particle flux collection tank, 28 negative pressure adsorption port, 29 particle recovery channel, 30 recovery pipeline, 31 negative pressure pump, 32 displacement slider, 33 translation slide rail, 34 wire supply turntable, 35 wire coil seat, 36 wire supply rack, 37 equipment control device, 38 pneumatic telescopic cylinder, 39 inlet and outlet air pump. DETAILED DESCRIPTION

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

[0035] See also Figure 1-12 , the present invention provides a technical solution:

[0036] Embodiment 1:

[0037] A wind power monopile lifting lug welding method, the method using the following device, the device comprising:

[0038] A gantry 1, a tower activity channel 2 is formed in the middle of the frame bodies on both sides of the gantry 1, an equipment installation platform 3 is provided on the gantry 1 in a lifting manner, a welding device is installed on the equipment installation platform 3, and a workpiece hanging hole 4 is opened in the middle of the gantry 1 and the equipment installation platform 3, and a lifting lug 5 is sent into the welding area through the workpiece hanging hole 4;

[0039] The welding device is an automated welding robot arm 6, a submerged arc welding head 7 is installed at the end of the automated welding robot arm 6, and the automated welding robot arm 6 is installed on an X-axis sliding beam 8 in a translational sliding manner, and both ends of the X-axis sliding beam 8 cooperate with the Y-axis translation guide rail 10 through a translation slider 9;

[0040] A roller frame 11 is arranged below the tower movable channel 2, and the tower 12 is lifted by the roller frame 11, and,

[0041] The submerged arc device comprises an annular matching enclosure 13, which is coaxially arranged with the lifting ear 5 in the horizontal welding state, and the lifting ear 5 and the annular matching enclosure 13 are separated to form a welding operation space 14 for inserting the submerged arc welding joint 7, the annular matching enclosure 13 is fixedly connected with a flip movable arm 15, and the flip movable arm 15 is fixedly connected with a flip shaft 16 at one end away from the annular matching enclosure 13, and the flip shaft 16 is movably installed at the bottom of the equipment installation platform 3, and the flip shaft 16 performs a 90° flip movement under the drive of the flip driving device, and a plurality of telescopic holes 17 are arranged in an annular array on the annular matching enclosure 13, and a plurality of telescopic holes 17 are telescopically inserted with an enclosing airbag rod 18, which is enclosed. An enclosed airbag 19 is provided on the outside of the enclosed airbag rod 18 against one side of the tower 12, and a plurality of enclosed airbag rods 18 are provided with gas inlet and outlet holes 20 connected to the enclosed airbag 19. The plurality of gas inlet and outlet holes 20 are connected to an inlet and outlet air pump 39 installed on the equipment installation platform 3 through an air pump pipe. The operation of the inlet and outlet air pump 39 causes the enclosed airbag 19 to expand or contract. During the expansion process, the plurality of enclosed airbags 19 are squeezed against each other and enclosed with the lifting ear 5 to form an annular airbag compartment 21. By evenly laying granular flux in the annular airbag compartment 21, the submerged arc welding joint 7 of the automated welding robot arm 6 is in the granular flux layer during the welding process, thereby realizing the submerged arc welding operation on the surface of the arc-shaped workpiece.

[0042] In this embodiment, the gantry 1 serves as a carrying device for various parts and components, and a tower activity channel 2 is formed in the middle of the frame on both sides thereof, through which the tower 12 is sent to the bottom of the equipment installation platform 3. The equipment installation platform 3 is lifted and arranged on the gantry 1, and adopts a hydraulic lifting mechanism commonly used in the prior art as a lifting drive mechanism. By controlling the height of the equipment installation platform 3, the tower 12 with a diameter can be welded through the platform to perform the lifting lug 5 welding operation. The lifting lug 5 is sent into the welding area through the workpiece lifting hole 4 opened in the middle of the gantry 1 and the equipment installation platform 3, and the welding operation is performed on the weld position by the welding device. The welding device is an automatic welding robot arm 6, and a wire feed turntable 34 is also installed on the automatic welding robot arm 6. The wire feed turntable 34 continuously pushes the welding wire to the submerged arc welding joint 7. A wire coil seat 35 is also installed on the equipment installation platform 3, and the wire coil seat 35 has a The welding wire is wound on the wire supply turntable through the wire supply rack 36, and a submerged arc welding head 7 is installed at the end of the automatic welding robot arm 6. The automatic welding robot arm 6 is installed on the X-axis sliding beam 8 in a translational sliding manner. The two ends of the X-axis sliding beam 8 cooperate with the Y-axis translation guide rail 10 through the translation slider 9. Through the movement of the translation slider 9 and the automatic welding robot arm 6 on the X-axis sliding beam 8, welding operations can be performed on any area below the workpiece hanging hole 4. The tower 12 is lifted by the roller frame 11, and the bottom of the roller frame 11 is also fixedly installed on the displacement slider 32. The displacement slider 32 cooperates with the translation slide rail 33, and the tower 12 is driven to move by the movement of the displacement slider 32. In order to realize the submerged arc welding operation of the weld around the lifting ear 5, the method in which the welding particles in the prior art directly cover the surface of the weld will not be able to achieve the coverage of the welding particles for this device. Refer to the attached manual Figure 1 and 5The lifting ears 5 are located on both sides of the length extension direction of the tower 12 and have a certain arc slope. The granular flux cannot effectively adhere to the top of the weld. The granular flux will slide down from both sides of the tower 12 under the action of its own gravity. Therefore, in order to prevent the granular flux from sliding, in this embodiment, the annular matching enclosure 13 is moved to the welding area in front of the lifting ears 5, and then the lifting ears 5 are hoisted so that the lifting ears 5 and the annular matching enclosure 13 are coaxially arranged. After the hoisting is completed, the several enclosed airbag rods 18 on the annular matching enclosure 13 are pressed against the surface of the tower 12. The device for driving the several enclosed airbag rods 18 to extend and retract is a pneumatic telescopic cylinder 38. The number of the several pneumatic telescopic cylinders 38 is consistent with the number of the enclosed airbag rods 18 and corresponds one to one. The several pneumatic telescopic cylinders 38 are 8 are all connected to the pneumatic telescopic main cylinder through a pipeline, and the telescopic movement of the pneumatic telescopic main cylinder drives the telescopic movement of several pneumatic telescopic cylinders, so that several enclosed airbag rods 18 are pressed against the surface of the tower 12. At this time, the gas inlet and outlet holes 20 are inflated by the air inlet and outlet pump 39, so that the enclosed airbag 19 expands. The inflated enclosed airbag 19 is tightly pressed against to form an annular airbag compartment 21, thereby filling the gap between the contact side of the tower 12 and the adjacent enclosed airbags 19. At this time, granular flux is filled into the annular airbag compartment 21 to ensure that the submerged arc welding joint 7 can perform submerged arc welding operations. An equipment control device 37 is also installed on the equipment installation platform 3, and each electrical equipment is controlled by the equipment control device 37.

[0043] Embodiment 2:

[0044] When the annular matching enclosure 13 is in a horizontal welding state, several enclosing airbags 19 on both sides of the tower 12 in the extension direction of the width are located on one side of the annular airbag compartment 21 and are provided with a granular flux release port 22. The granular flux release port 22 is connected with a granular release channel 23 opened in the enclosing airbag rod 18. Several granular release channels 23 are connected with a granular pump 25 through a release pipe 24. The granular pump 25 is connected with a granular flux collecting chamber 26. The granular flux is released to the annular airbag compartment 21 through the granular flux release port 22 by the granular pump 25. In the process of releasing the granular flux to the annular airbag compartment 21 through the granular flux release port 22, the tower 12 is driven by the power of the roller frame 11 to reciprocate around the axis to disperse the granular flux to both sides until the entire annular airbag compartment 21 is covered, thereby ensuring that the weld position is inside the granular flux layer.

[0045] In this embodiment, an automatic adding method of the granular flux is further disclosed, in which the granular flux in the granular flux collecting chamber 26 is pumped into the release pipe 24 by the granular pump 25, and the granular flux finally flows out through the granular flux release port 22. Since the granular flux release port 22 is located near the highest point of the annular airbag compartment 21, during the release of the granular flux, the granular flux will slide to both sides along the tower 12. At the same time, the tower 12 is driven by the power of the roller frame 11 to reciprocate around the axis to disperse the granular flux to both sides until the entire annular airbag compartment 21 is covered. This method realizes the automatic adding of the granular flux.

[0046] Embodiment three:

[0047] When the annular mating enclosure 13 is in a horizontal welding state, a plurality of enclosed airbags 19 located on both sides of the length extension direction of the tower 12 are further provided with granular flux collecting grooves 27, and the granular flux collecting grooves 27 face one side of the annular airbag compartment 21. The granular flux spread in the annular airbag compartment 21 slides down during the reciprocating rotation of the tower 12 around the axis on both sides, and finally enters the granular flux collecting grooves 27. A negative pressure adsorption port 28 is further provided at the bottom of the enclosed airbag rod 18 in the granular flux collecting groove 27. The negative pressure adsorption port 28 is connected to a particle recovery path 29 opened in the enclosed airbag rod 18. The particle recovery paths 29 of a plurality of enclosed airbag rods 18 are connected to a negative pressure pump 31 through a recovery pipe 30, and the negative pressure pump 31 recovers the granular flux into the granular flux collection cabin 26.

[0048] In this embodiment, an automatic recovery method of the granular flux is further disclosed. The granular flux in the granular flux collecting tank 27 is adsorbed by the negative pressure pump 31, and finally enters the granular flux collecting chamber 26 through the negative pressure adsorption port 28 and the particle recovery path 29. Since the granular flux collecting tank 27 is arranged at the lowest point of the annular airbag compartment 21, after the granular flux in the granular flux collecting tank 27 is recovered, the flatly arranged granular flux will roll downward under the action of gravity and then enter the granular flux collecting tank 27. The particles located above the tower 12 are relatively stable and not easy to slide. At this time, the tower 12 is driven by the power of the roller frame 11 to reciprocate around the axis to both sides to disperse the granular flux to both sides. Finally, all the granular flux falls into the granular flux collecting tank 27. By arranging the negative pressure adsorption port 28 in the granular flux collecting tank 27, the granular flux can be effectively recovered.

[0049] Embodiment 4:

[0050] The number of the annular matching enclosures 13 is three, and the three annular matching enclosures 13 are arranged in an axially overlapping manner in a horizontal welding state.

[0051] In this embodiment, a plurality of annular matching enclosures 13 are provided, and the inner diameters thereof are different. The annular matching enclosures 13 with different inner diameters can adapt to the lifting ears 5 of different sizes, so as to perform welding operations on the lifting ears 5 of different sizes.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for welding a wind power monopile lifting lug, characterized in that: The method uses the following device, which includes: A gantry, wherein a tower activity channel is formed in the middle of the frame bodies on both sides of the gantry, an equipment installation platform is provided on the gantry in a lifting manner, a welding device is installed on the equipment installation platform, and workpiece lifting holes are provided in the middle of the gantry and the equipment installation platform, through which the lifting lugs are sent into the welding area; A welding device, wherein the welding device is an automated welding robot arm, a submerged arc welding head is installed at the end of the automated welding robot arm, the automated welding robot arm is installed in a translational sliding manner on an X-axis sliding beam, and both ends of the X-axis sliding beam cooperate with a Y-axis translation guide rail through a translation slider; A roller frame is arranged below the tower movable channel, and the tower is lifted by the roller frame, and, A submerged arc device, the submerged arc device includes an annular matching enclosure, the annular matching enclosure is coaxially arranged with the lifting ear in a horizontal welding state, the lifting ear and the annular matching enclosure are separated to form a welding operation space for inserting a submerged arc welding joint, the annular matching enclosure is fixedly connected to a flip movable arm, the flip movable arm is fixedly connected to a flip shaft at one end away from the annular matching enclosure, the flip shaft is movably installed at the bottom of the equipment installation platform, the flip shaft performs a 90° flip movement under the drive of a flip driving device, a plurality of telescopic holes are opened in an annular array on the annular matching enclosure, and enclosing airbag rods are telescopically inserted into the plurality of telescopic holes. The enclosed airbag rod is against the outer sleeve of one side of the tower tube and is provided with an enclosed airbag. Several of the enclosed airbag rods are provided with gas inlet and outlet holes connected to the enclosed airbag. Several of the gas inlet and outlet holes are connected to the inlet and outlet air pumps installed on the equipment installation platform through pump air pipelines. The inlet and outlet air pumps work to expand or contract the enclosed airbags. During the expansion process, several of the enclosed airbags are squeezed against each other and enclosed with the lifting ears to form an annular airbag compartment. By evenly laying granular flux in the annular airbag compartment, the submerged arc welding joint of the automated welding robot arm is in the granular flux layer during the welding process, thereby realizing the submerged arc welding operation on the surface of the arc-shaped workpiece; When the annular matching enclosure is in a horizontal welding state, several enclosing airbags on both sides of the tower in the extension direction of the width are provided with a granular flux release port on one side of the annular airbag compartment, and the granular flux release port is connected with a granular release channel provided in the enclosing airbag rod, and several of the granular release channels are connected with a granular pump through a release pipe, and the granular pump is connected with a granular flux collecting cabin, and the granular flux is released to the annular airbag compartment through the granular flux release port by the granular pump. In the process of releasing the granular flux to the annular airbag compartment at the granular flux release port, the tower is driven by the power of the roller frame to reciprocate around the axis to disperse the granular flux to both sides until the entire annular airbag compartment is covered, thereby ensuring that the weld position is inside the granular flux layer; When the annular mating enclosure is in a horizontal welding state, a plurality of the enclosed airbags located on both sides of the tower length extension direction are further provided with granular flux collecting grooves, the granular flux collecting grooves face one side of the annular airbag compartment, and the granular flux spread in the annular airbag compartment slides down during the reciprocating rotation of the tower around the axis to both sides, and finally enters the granular flux collecting groove, and a negative pressure adsorption port is further provided at the bottom of the enclosed airbag rod in the granular flux collecting groove, the negative pressure adsorption port is connected with a particle recovery path opened in the enclosed airbag rod, and the particle recovery paths of a plurality of the enclosed airbag rods are connected with a negative pressure pump through a recovery pipe, and the negative pressure pump recovers the granular flux into the granular flux collection cabin.

2. A wind power monopile lifting lug welding method according to claim 1, characterized in that: The number of the annular matching enclosures is three, and the three annular matching enclosures are arranged in an axially overlapping manner in a horizontal welding state.

3. A wind power monopile lifting lug welding method according to claim 2, characterized in that: The bottom of the roller frame is also fixedly mounted on a displacement slider, and the displacement slider cooperates with the translation slide rail.

4. A wind power monopile lifting lug welding method according to claim 3, characterized in that: The automated welding robot arm is also equipped with a wire supply turntable, which continuously pushes welding wire to the submerged arc welding joint. The equipment mounting platform is also equipped with a wire coil seat, and the welding wire on the wire coil seat is wound on the wire supply turntable through a wire supply rack.

5. A wind power monopile lifting lug welding method according to claim 4, characterized in that: An equipment control device is also installed on the equipment installation platform.

6. A wind power monopile lifting lug welding method according to claim 4, characterized in that: The device for driving the extension and retraction of the plurality of enclosed airbag rods is a pneumatic telescopic cylinder. The number of the pneumatic telescopic cylinders is consistent with the number of enclosed airbag rods and they correspond one to one. The plurality of pneumatic telescopic cylinders are connected to a pneumatic telescopic master cylinder through a pipeline. The extension and retraction of the pneumatic telescopic master cylinder drives the extension and retraction of the plurality of pneumatic telescopic cylinders.

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