A new pile hoist adding and modifying method for a wind power platform

Abstract

The application discloses a wind power platform new pile-winding crane adding modification method, comprising the following steps: strengthening and modifying the original fixed pile chamber, and modifying according to the structure section; precasting a pile-winding crane base, and manufacturing the structure of the pile-winding crane base; hoisting the pile-winding crane base, lifting the platform to a proper height in the pile-inserting state, and positioning and welding. By adding the pile-winding crane on the platform and accurately precasting and installing the pile-winding crane, the hoisting capacity and operation efficiency during wind power installation can be remarkably improved. The added pile-winding crane enables the platform to independently complete the installation of a main tower of a wind driven generator, and the installation process is simplified and the construction period is shortened without relying on other floating cranes. The wind power platform after modification can adapt to the installation requirement of larger wind driven generators and can work in more complex sea conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power equipment and relates to a method for modifying a new pile-winding crane of a wind power platform. BACKGROUND

[0002] Due to the development of ocean wind power, wind turbines tend to be large-scale and are deployed in deep water areas, which requires hoisting equipment to be able to adapt to higher installation heights and complex sea conditions. The traditional wind power installation platform cannot meet these requirements, so it is necessary to upgrade and modify the existing platform to install larger wind turbines. SUMMARY

[0003] In order to achieve the above purpose, the application adopts the following technical solutions:

[0004] A method for modifying a new pile-winding crane of a wind power platform, comprising the following steps: strengthening and modifying the original fixed pile chamber according to the structure; prefabricating the pile-winding crane base and making the structure of the pile-winding crane base; hoisting the pile-winding crane base, lifting the platform to an appropriate height in the inserted pile state, and positioning and welding.

[0005] Preferably, the step of strengthening and modifying the original fixed pile chamber according to the structure comprises the following steps: first, prefabricate the piece body, and divide the longitudinal wall plate into several piece bodies; after the ship is docked and dry-docked, place a sand box under the pile shoe and pile sand in it, completely lower the pile shoe onto the sand box in the dock bottom by using the pile leg locking device, and use the locking device, guide ring beam and oil cylinder device to ensure that the structure is completely stress-free during construction; remove the outer wall plate of the pile leg well and the components around the piece body hoisting, then open process holes according to process requirements and remove the plates in the plate replacement area; install the wall plate piece body according to the staging requirements and weld it, then perform a flaw detection inspection after welding is completed, perform a tightness test on the cabin, and finally restore the previously removed components.

[0006] Preferably, the around pile crane base is prefabricated, and the structure of the around pile crane base is manufactured by the following steps: blanking, cutting materials according to a structure drawing and a blanking drawing; arc conical plate processing, dividing the pressure head bisecting line, and processing each plate into a conical arc shape according to a processing template; arc conical plate splicing, using an arc radian jig plate to manufacture a splicing jig of the arc conical plate, splicing and welding the arc conical plate on the jig, and fire adjusting after welding; cylinder body assembly prefabrication, after the flange reinforcing plate of the cylinder body is welded, installing the triangular plate and the T-shaped flange plate; cylinder body inner reinforcing T-shaped profile prefabrication, completing the splicing of the flat plate. The total assembly jig of the cylinder body structure is arranged at a wharf or other area where hoisting is available, and the gasket plate, support pipe and component installation theoretical line are installed according to the predetermined position, the cylinder body structure is totally assembled, the reversed cylinder body assembly is hoisted to the support pipe of the total assembly jig, adjusted to the appropriate height and position, and fixed. The flat plate body and the arc conical plate body are installed according to the line of the upper end cylinder body and the ground template plate, and the cylinder outer plate is installed, and the installation is performed according to the reinforcing T-shaped profile ground template line. The cylinder other outer plate and the outfitting piece are installed, including the installation of the lifting ring.

[0007] Preferably, the blanking, cutting materials according to a structure drawing and a blanking drawing, includes: reserving 100mm processing allowance on both sides of the conical arc.

[0008] Preferably, the arc conical plate processing, dividing the pressure head bisecting line, and processing each plate into a conical arc shape according to a processing template, includes: the bisecting line interval is 100-120mm.

[0009] Preferably, the around pile crane base hoisting, lifting the platform to the appropriate height in the pile insertion state, positioning and welding, includes the following steps:

[0010] Platform lifting, lifting the platform to the top of the pile fixing chamber in the pile insertion state;

[0011] Locking and hoisting, locking the platform floating crane and hoisting the cylinder flange;

[0012] Positioning and adjusting, paying attention to the positioning direction of the flange cylinder base and the top of the pile fixing chamber, guiding the flange cylinder base to the butt joint position, and performing preliminary positioning and adjusting;

[0013] Perpendicularity and height measurement, taking the deck marker height plane as the total station instrument base surface, establishing a perpendicular line measurement surface, respectively measuring the x, y, z values of the cross position perpendicular line of the flange cylinder base, adjusting through the inclined steel wire to ensure the perpendicularity of the left and right, front and back of the flange cylinder base, and at the same time, measuring the height from the flange surface to the deck marker to ensure that the height meets the drawing requirements;

[0014] Welding positioning, after the precision positioning meets the requirements, reinforcing plate welding positioning;

[0015] Welding sequence and monitoring, first weld reinforcing plate corner weld, then weld flange cylinder inner wall opposite weld, after inner wall welding, buckle groove, then weld cylinder outer wall opposite weld, during welding, measure flange plane every 8 hours, monitor welding deformation, if deviation occurs, stop welding and report immediately;

[0016] Welding seam inspection, after welding, all welds are inspected;

[0017] Final height measurement, after completion, again take deck marker height plane as reference, total station instrument measures flange cylinder base height, i.e. measures flange to deck height.

[0018] Preferably, the height of the flange surface to the deck height is measured to ensure that the height meets the requirements of the drawings, including: the height deviation of the flange surface to the deck height is within 1mm.

[0019] Preferably, the flange plane is measured every 8 hours to monitor the welding deformation, and if deviation occurs, the welding is stopped and reported, including: if the deviation value is greater than 1.5mm, the welding is stopped.

[0020] The beneficial effects of the present application are: by adding a pile-encircling crane on the platform and precisely prefabricating and installing it, the lifting capacity and work efficiency during wind power installation can be significantly improved. The added pile-encircling crane enables the platform to independently complete the installation of the main tower of the wind turbine, without relying on other floating cranes for assistance, thereby simplifying the installation process and shortening the construction period. The fabricated wind power platform can adapt to the installation needs of larger wind turbines and work in more complex sea conditions. This not only expands the application range of the platform, but also improves its competitiveness in the wind power industry. By reducing the dependence on external auxiliary equipment, the construction cost is reduced, and by improving the work efficiency, the construction period is shortened, thereby reducing the overall engineering cost. In addition, improving the precision control and construction quality also means a reduction in the later operation and maintenance costs, as the maintenance needs due to improper installation are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a flowchart of the overall steps of the method of the present application.

[0022] Figure 2 is a flowchart of the strengthening and modification of the original pile-encircling chamber of the method of the present application.

[0023] Figure 3 is a flowchart of the prefabrication of the pile-encircling crane base of the method of the present application.

[0024] Figure 4 is a flowchart of the hoisting of the pile-encircling crane base of the method of the present application.

[0025] Figure 5 is a structural schematic diagram of the whole method of the present application.

[0026] Figure 6 is a structural schematic diagram of the whole method of the present application.

[0027] The reference signs are explained as follows: 1 - new winding pile A frame; 2 - new winding pile hoist arm; 3 - new winding pile hoist turntable; 4 - new winding pile hoist base; 5 - pile fixing chamber.

[0028] 61 - cushion plate, 62 - support pipe, 63 - code plate;

[0029] 71 - diameter 6700 ground sample line, 72 - diameter 7590 ground sample line, 73 - ground sample line, 74 - ground sample cross line, 75 - square hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application. It should be understood that the present application is not limited by the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the embodiments of this application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] The application provides the accompanying drawings Figures 1-5 In the embodiments of the application, a wind power platform new pile surrounding crane modification method, the size unit mentioned in the steps is millimeter, comprising the following steps:

[0035] S1. Strengthening and reconstruction of the original pile room, according to the structure section reconstruction; according to the characteristics of the pile room strengthening structure, and the problem of preventing the deformation of the reconstruction structure, therefore the reconstruction project is divided into at least two stages for construction;

[0036] S11. First, the piece is prefabricated, and the longitudinal wall plate is divided into several pieces for prefabrication; if the longitudinal wall encounters a cable that cannot be moved, the wall plate needs to be holed to avoid the cable.

[0037] S12. After the ship is docked and dry-docked, a sand box needs to be placed under the pile shoe and sand needs to be piled in it, the pile shoe is completely lowered onto the sand box on the dock bottom by using the pile leg locking device, and the locking device, the guide ring beam and the oil cylinder device are used to ensure that the structure is not stressed during the construction process;

[0038] When the mooring pile is arranged, the sand box is placed under the pile shoe on the dock bottom, and the sand is piled in the sand box according to the requirements, then the pile shoe is completely lowered onto the sand box on the dock bottom by using the pile leg locking device, and the locking device, the guide ring beam, the oil cylinder and other devices are used to ensure that the structure is not stressed, at the top of the pile room and the main deck, the inclined cutting limiting block is inserted into the pile leg to limit and fix the pile leg.

[0039] S13. Remove the pile leg well outer wall plate and the components around the piece hoisting, then open the process hole according to the process requirements, remove the plate in the replacement area; add angle steel between the wall plate materials for reinforcement.

[0040] S14. Install the wall plate piece and perform welding according to the staging requirements, perform flaw detection inspection after welding is completed, and perform tightness test on the cabin, and finally restore the removed components.

[0041] According to the phased requirements, open the first-phase process holes and remove the plates in the first-phase plate replacement area. Among them, the process hole plates need to be reused, and attention should be paid to the removal quality. According to the phased requirements, install the wall panel pieces, and weld them after installation. The fillet welds to the main deck and the bottom plate should be full penetration welds. Other welds should be made according to the drawings. The first-phase welding should be 90% QC confirmed. Only if the requirements are met can the second-phase project be dismantled. Perform flaw detection on the welds, conduct tightness tests on the compartments, and restore the dismantled pipelines, cables, outfitting components, etc.

[0042] S2. Prefabrication of the pile-around crane base, and fabrication of the structure that makes up the pile-around crane base;

[0043] S21. Cutting: Cut the material according to the structural drawing and the cutting drawing, adding a 100mm machining allowance to each side of the conical arc;

[0044] S22. Machining of arc-shaped conical plates: Mark the bisectors of the pressure head with a spacing of 100-120mm. Each plate is machined into a conical arc shape according to the machining template.

[0045] S23. Assembling of arc-shaped conical plates: A jig for assembling arc-shaped conical plates is made using an arc jig plate, and the arc-shaped conical plates are assembled and welded on the jig. After welding, heat treatment is performed.

[0046] S24. Prefabrication of cylindrical body components: After the welding of the cylindrical body flange reinforcing plate is completed, install the triangular plate and T-type flange plate;

[0047] S25. Prefabricate the reinforcing T-shaped profiles inside the cylinder to complete the splicing of the flat plates.

[0048] S26. For example Figure 6 As shown, the assembly jig for the cylindrical structure is arranged at the dock or other areas where it can be lifted. The jig is installed with pads 61, support pipes 62, and the theoretical lines for component installation are marked according to the predetermined positions. The assembly jig for the cylindrical structure is located at the lower end of the cylindrical body at the dock or other areas where a 600T floating crane can lift it. A 20*700 pad 61 is set, and a mounting plate 63 is installed on the pad 61 at approximately 1 meter intervals. On the circumference of 6700mm diameter, eight equally spaced support pipes 62 with a diameter of 219*10mm are set. The support pipes 62 are connected as a whole by L150*150*10 angle steel. A square opening 75, a cross line 74, a line 73, a line 71 with a diameter of 6700mm, a line 72 with a diameter of 7590mm are marked on the jig ground. The installation lines for the cylindrical body reinforcing T-shaped profiles are also marked, and the theoretical lines for component installation are marked.

[0049] S27. The total assembly of the cylinder structure is hoisted to the support pipe of the total assembly jig, adjusted to the appropriate height and position, and fixed. After the reverse cylinder assembly is reversed, it is hoisted to the total assembly jig support pipe, adjusted to the height 3109 according to the drawing size, and the diameter 7590 of the cylinder outer plate is adjusted to be straight, the cylinder cross line is aligned with the ground pattern cross line, the flange surface is adjusted to be horizontal, and is fixed on the support pipe.

[0050] S28. Install the flat sheet and the circular arc conical sheet, install according to the upper end cylinder and the ground pattern code plate line, and install the cylinder outer plate to strengthen the T-shaped ground pattern line; install the circular arc conical sheet according to the upper end cylinder and the flat sheet, and then install the cylinder outer plate to strengthen the T-shaped ground pattern line.

[0051] S29. Install other cylinder outer plates and fittings, including the installation of lifting rings, including four D-shaped 40T lifting rings.

[0052] S291. The flange cylinder of the crane manufacturer is combined with the total assembly of the cylinder, the upper end 4109 excess line of the cylinder structure is drawn, a 2mm cutting excess is left, the excess is cut off, the beveling is opened according to the requirements, and the polishing is good, and four guide code plates are installed; the manufacturer's flange cylinder is hoisted, corresponding to the front and rear, left and right directions, and is guided into the closing opening from the guide plate, the cross line is adjusted to coincide with the ground pattern cross line, the base surface of the total station instrument is used as the reference surface, the reference surface is perpendicular to the center line, the flatness of the flange is measured, and the highest point of the flatness measurement data cannot be greater than 7mm; after the flange flatness is adjusted to the required accuracy, the QC is reported, and after the shipowner is qualified, the code plate is installed every 800 on the internal circumference of the cylinder; when the gap between the closing openings of the cylinder is greater than 2mm, the flat iron is added between the bevel gaps on the outside to fill the gap, one is padded every 300mm in the circumference direction, to prevent welding shrinkage and affect the accuracy requirements of the flange; the closing openings of the cylinder are symmetrically welded.

[0053] Install the cylinder fitting structure, and perform the weld detection of the cylinder structure.

[0054] S292. The flange surface of the pile hoisting base is machined, the base surface of the total station instrument is used as the reference surface, the reference surface is perpendicular to the center line, the flatness of the flange is measured, and the flange machining origin elevation is determined; the equipment support platform is installed, the cylinder tooling code plate is connected with the equipment support platform tooling bolt, the bolt is fastened, and the connection surface is fixed by spot welding.

[0055] The equipment is idling, the flatness and the center position are detected, the flange horizontal reference point and the center reference point of the ship structure precision control are referred to, the laser leveling instrument and the dial indicator are used to adjust the equipment, and the horizontal and center of the machining equipment are ensured to be within 2mm of the reference point error of the flange;

[0056] Use flange milling cutter equipment to rotate a circle, preliminary measurement of flange flatness, including measuring the highest point and the lowest point of the flange gap data, and structural drawing requirements to detect the overall thickness of flange processing allowance, and make sure whether to meet the processing requirements;

[0057] Rough machining using milling cutter, each processing amount 1.5mm-2mm until the flange face is smooth;

[0058] Semi-rough machining using milling cutter, each processing amount 0.1mm-0.3mm, and using laser leveling instrument to detect and control during processing, the overall flatness of the flange is <1mm, and 6mm allowance is reserved after drilling holes, and then finishing machining;

[0059] Use equal division deduction method to cooperate with flange processing equipment to draw the center of the flange bolt hole division circle Ø7760, and then divide 150 Ø60mm bolt hole drilling center points and mark the punch points, and draw the processing circle and Ø70mm inspection circle with the punch points, measure the distance error between each adjacent hole ±0.2mm, and re-measure the division to confirm that the center line of each hole can be overlapped twice, and report for inspection;

[0060] Before drilling each time, the drilling center position needs to be confirmed, and the equipment needs to be locked for drilling after confirmation. After drilling to 2mm depth, the position is confirmed again.

[0061] After processing 3-5 bolt holes each time, use vernier caliper, right angle ruler, and reference inspection line to measure the relative position (chord tangent) hole diameter, perpendicularity, etc.

[0062] Back machining, using boring cutter to scratch the back surface, and ensuring that the back surface is not less than Ø115mm in diameter and ≤2mm in depth;

[0063] Fine milling of the upper surface, single processing amount 0.1mm, using laser plane measuring instrument to measure the flange upper surface data, and finishing the upper surface to the required flatness, and ensuring that the flatness tolerance range is ≤0.4mm.

[0064] S3. Hoist around the pile, lift the platform to the appropriate height in the inserted pile state, and position and weld.

[0065] S31. Platform lifting, lifting the platform to the top of the pile room in the inserted pile state;

[0066] S32. Locking and lifting, locking the platform floating crane and lifting the cylinder flange;

[0067] S33. Positioning and adjustment: Pay attention to the positioning direction of the flange cylinder base and the top of the pile fixing chamber. Guide the flange cylinder base to the interface position and perform preliminary positioning adjustment. The flange cylinder base should pay attention to the positioning direction of the flange cylinder base and the top of the pile fixing chamber. Slowly guide the flange cylinder base to the interface position. Fix the flange cylinder base relative to the flange cylinder base, so that the crane bears 30% of the force, and perform positioning adjustment of the flange cylinder base.

[0068] S34. Verticality and Height Measurement: Using the deck marker elevation plane as the total station's base plane, establish a vertical measurement surface. Measure the (x, y, z) values ​​of the crosshair perpendicular to the flange base. Adjust using a wedge wire to ensure the verticality of the flange base in the left-right and front-back directions. Simultaneously, measure the height from the flange surface to the deck elevation to ensure the height meets the drawing requirements. Using the deck marker elevation plane as the total station's base plane, establish a vertical measurement surface with the total station. Measure the crosshair perpendicular to the flange base, measuring the (x, y, z) values. That is, the (x) value remains constant when measuring along the height direction on the right side, and the (y) value remains constant when measuring along the height direction on the front side. Adjust using a wedge wire at the crosshair position to position the verticality of the flange base in the left-right and front-back directions, with deviations within 1000mm of the flange height.

[0069] S35. Welding positioning: After the accuracy positioning meets the requirements, the reinforcing plate is welded and positioned.

[0070] Using the deck marker elevation plane as the base plane of the total station, the total station measures the height of the flange cylinder base. The perimeter is measured at an average of 24 points, that is, the height from the flange surface to the deck elevation is measured. The deviation is within 1mm, and the height value meets the requirements of the drawing.

[0071] After the accuracy positioning meets the requirements, eight reinforcing plates are welded to the flange cylinder base.

[0072] S36. Welding sequence and monitoring: First weld the fillet weld of the reinforcing plate, then weld the butt joint weld of the inner wall of the flange cylinder. After the inner wall is welded and the groove is closed, weld the butt joint weld of the outer wall of the cylinder. During the welding process, measure the flatness of the flange face every 8 hours and monitor the welding deformation. If any deviation occurs, stop welding immediately and report it.

[0073] For flange base welding, first weld the reinforcing plate fillet weld, then weld the flange inner wall butt weld. After the inner wall is welded and the groove is cut, weld the outer wall butt weld. Weld strictly according to the parameters and welding sequence. Four welders weld symmetrically at the same time. The welding sequence is marked on the construction site. Weld strictly according to the welding sequence. The on-site supervisor should monitor the welding to ensure that the welding sequence and welding quality are strictly followed. For welding details, please refer to the flange base welding process.

[0074] During the welding process, the flatness of the flange surface is measured every 8 hours to monitor welding deformation. If the deviation is greater than 1.5mm, welding is stopped immediately and the project team is notified. Construction can only proceed after the plan is revised.

[0075] S37. Weld inspection, after welding, all welds are inspected by UT;

[0076] S38. Final height measurement, after all work is completed, again using the deck bollard elevation plane as a reference, total station instrument is used to measure the height of the flange cylinder base, i.e. the height of the flange to the deck elevation.

[0077] After all work is completed, the deck bollard elevation plane is used as the total station instrument base surface, the total station instrument is used to measure the height of the flange cylinder base, the circumference is measured at 24 points, i.e. the height of the flange to the deck elevation, the elevation deviation is not more than 1.5 mm.

[0078] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is also possible in the present application that steps can be executed in different sequence, where it is possible to do so, that certain steps can be expanded upon to provide further understanding thereof. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0079] The above description of disclosed embodiments will enable one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for retrofitting a wind power platform with a new slalom crane, characterized in that, Includes the following steps: The original pile-fixing chamber was reinforced and renovated in sections according to the structure; Prefabrication of the pile-around crane base; fabrication of the structure that makes up the pile-around crane base. The base of the hoist is hoisted around the pile, and the platform is raised to an appropriate height while the pile is in the inserted state for positioning and welding; The prefabricated pile-mounted crane base is used to construct the structure that makes up the pile-mounted crane base. Includes the following steps: Cut the material according to the structural diagram and cutting diagram; For the processing of arc-shaped conical plates, the bisectors of the pressure head are marked, and each plate is processed into a conical arc shape according to the processing template; The arc-shaped conical plates are assembled by using an arc-shaped jig to create an assembly jig for the arc-shaped conical plates. The arc-shaped conical plates are then assembled and welded on this jig, and heat treatment is performed after welding. Prefabrication of cylindrical body components: After the welding of the cylindrical body flange reinforcing plate is completed, install the triangular plate and T-type flange plate; The T-shaped reinforcing profiles are prefabricated inside the cylinder to complete the splicing of the flat plates; The assembly jig for the cylindrical structure is arranged at the dock or other areas where it can be lifted, and the pads, support pipes and marking components are installed according to the predetermined positions and the installation theoretical line is set. For the cylindrical structure assembly, the reversed cylindrical components are hoisted onto the support tube of the assembly jig, adjusted to the appropriate height and position, and then fixed. Install the flat plate and the arc-shaped conical plate according to the lines marked on the upper cylinder and the ground pattern plate, and install the outer plate of the cylinder, using the T-shaped ground pattern line as a reference for installation; Installation of other outer plates and outfitting components of the cylinder, including the installation of lifting rings; The hoisting of the pile-mounted base involves lifting the platform to a suitable height while the pile is in the inserted state, followed by positioning and welding, and includes the following steps: The platform is raised to the top of the pile-fixing chamber while the piles are in the driving state. Locking and hoisting: Locking the platform floating crane and hoisting the cylindrical flange; Positioning and adjustment: Pay attention to the positioning direction of the flange cylinder base and the top of the pile fixing chamber, guide the flange cylinder base to the mating position, and perform preliminary positioning and adjustment; Verticality and height measurement: Using the elevation plane of the deck marker as the base plane of the total station, establish a vertical measurement surface, and measure the x, y, and z values ​​of the vertical line of the flange base cross position respectively. Adjust the verticality of the flange base left and right and front and back by adjusting the inclined steel wire. At the same time, measure the height from the flange surface to the deck elevation to ensure that the height meets the requirements of the drawing. Welding positioning: After the accuracy positioning meets the requirements, the reinforcing plate is welded and positioned. Welding sequence and monitoring: First weld the fillet weld of the reinforcing plate, then weld the butt joint weld of the inner wall of the flange cylinder. After the inner wall is welded and the groove is closed, weld the butt joint weld of the outer wall of the cylinder. During the welding process, measure the flatness of the flange face every 8 hours and monitor the welding deformation. If any deviation occurs, stop welding immediately and report it. Weld inspection: All welds are inspected after welding. Finally, after all work is completed, the height of the flange base is measured again using the deck marker elevation plane as a reference, i.e., the height of the flange from the deck elevation.

2. The method for retrofitting a wind power platform with a new pile-mounted crane according to claim 1, characterized in that, The reinforcement and renovation of the original pile-fixing chamber, based on the structural segmentation, includes the following steps: First, the panels are prefabricated, and the longitudinal wall panel is divided into several prefabricated panels; After the ship enters the dry dock and is dry-dry, sand boxes need to be placed at the bottom of the dock below the pile shoe and sand needs to be piled in them. The pile shoe is then lowered completely onto the sand box at the bottom of the dock using the pile leg locking device. The locking device, guide ring beam, and hydraulic cylinder device are used to ensure that the structure is completely free from stress during construction. Remove the outer wall panels of the pile leg well and the surrounding components that affect the hoisting of the sheet body. Then, open process holes according to process requirements and remove the panels in the replacement area. Install and weld the wall panels according to the phased requirements. After welding, conduct flaw detection and a tightness test on the compartment. Finally, restore the previously removed components.

3. The method for retrofitting a wind power platform with a new pile-mounted crane according to claim 1, characterized in that, The material cutting process involves cutting the material according to the structural diagram and the material cutting diagram, including reserving a machining allowance of 100mm on each side of the conical arc.

4. The method for retrofitting a wind power platform with a new pile-mounted crane according to claim 1, characterized in that, The process of machining the arc-shaped conical plate involves marking the bisectors of the pressure head. Each plate is machined into a conical arc shape according to the machining template, including bisectors spaced 100-120mm apart.

5. The method for retrofitting a wind power platform with a new pile-spinning crane according to claim 1, characterized in that, The height from the flange face to the deck elevation is measured to ensure that the height meets the drawing requirements, including: the height deviation from the flange face to the deck elevation is within 1mm.

6. The method for retrofitting a wind power platform with a new pile-mounted crane according to claim 1, characterized in that, The flatness of the flange face is measured every 8 hours to monitor welding deformation. If a deviation occurs, welding is stopped and a report is submitted, including: If the deviation exceeds 1.5mm, welding should be stopped.

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