Methods for replacing wear-resistant plates on self-elevating wind turbine installation platforms

Abstract

This invention relates to the field of wind power platform construction and provides a method for replacing wear-resistant plates on a self-elevating wind power installation platform. The method includes: installing a first H-beam, a second H-beam, and a third H-beam; determining the first, second, and third center points and judging whether they are on the same straight line; if they are on the same straight line, determining it as the center line and removing the upper and lower wear-resistant plates; based on the center line, determining the deviation value of the wear-resistant plate grooves and processing the new wear-resistant plates; and installing and welding the new wear-resistant plates. The method for replacing wear-resistant plates on a self-elevating wind power installation platform provided by this invention determines the deviation value of each wear-resistant plate groove through the center line, and then processes the corresponding new wear-resistant plates according to the deviation value, thereby ensuring that each new wear-resistant plate is at the same distance from the center line after installation, improving the installation accuracy of the new wear-resistant plates and ensuring the performance and lifespan of the pile legs.

Description

Technical Field

[0001] This invention relates to the field of wind power platform construction, and in particular to a method for replacing wear-resistant plates on a self-elevating wind power installation platform. Background Technology

[0002] With increasingly scarce economically exploitable wind resources on land, global wind farm construction has shown a trend of shifting from onshore to near-shore areas. Among these, jack-up offshore wind turbine installation platforms primarily use legs and a lifting system to elevate the platform to a certain height, adapting to different water depths and operating altitudes.

[0003] Wear-resistant plates are widely used in the legs and main structure of self-elevating offshore wind turbine installation platforms. These plates serve to guide, transmit forces, and resist wear. Current technology typically uses welding to fix the wear-resistant plates to the main structure. This method makes it easy to damage the main structure during plate replacement, and it's difficult to ensure new wear-resistant plates are aligned vertically. When wear-resistant plates are not installed accurately, adjacent leg sections cannot be aligned, and the wear-resistant plates cannot evenly transfer forces to the legs. This not only shortens the service life of the legs but also reduces their load-bearing capacity. Excessive deviation in the installation of wear-resistant plates can even lead to platform collapse, resulting in significant economic losses. Summary of the Invention

[0004] This invention provides a method and system for replacing wear-resistant plates on a self-elevating wind power installation platform, aiming to provide an accurate method for replacing wear-resistant plates.

[0005] In a first aspect, the present invention provides a method for replacing the wear-resistant plates of a self-elevating wind power installation platform, comprising:

[0006] A first I-beam is installed at the pile leg pin hole position on the upper wear-resistant plate, and a second I-beam and a third I-beam are installed above and below the lower wear-resistant plate, respectively; the upper wear-resistant plate and the lower wear-resistant plate are wear-resistant plates to be replaced installed on the pile leg;

[0007] Determine the first center of the circle containing the first I-beam, determine the second center of the circle containing the second I-beam, and determine the third center of the circle containing the third I-beam;

[0008] Using a total station, determine whether the first center, the second center, and the third center are on the same straight line;

[0009] If they are on the same straight line, then this line is determined as the center line, and the upper wear-resistant plate and the lower wear-resistant plate are removed.

[0010] Based on the centerline, the deviation value of the wear-resistant plate groove is determined, and based on the deviation value, the new wear-resistant plate is processed; the wear-resistant plate groove is the groove left on the pile leg after the wear-resistant plate is removed;

[0011] The new wear-resistant plate was installed and welded.

[0012] In one embodiment, removing the upper wear-resistant plate and the lower wear-resistant plate includes:

[0013] Use a carbon planer to remove the old weld seam, leaving a 5 mm root;

[0014] Grind away any remaining weld seams;

[0015] Magnetic particle testing is performed on the base material at the old weld location. If defects are found, the base material is ground or repaired by welding.

[0016] The installation of the new wear-resistant plate includes:

[0017] The new wear-resistant plate is installed onto the pile leg using a mounting plate method, ensuring that the gap between the pile leg and the new wear-resistant plate is not less than 8 mm.

[0018] The welding of the new wear-resistant plate includes:

[0019] A lifting ring was welded onto the new wear-resistant plate using carbon dioxide welding.

[0020] Grinding removes debris from the root of the bevel and within a 30 mm range of the bevel of the new wear-resistant plate;

[0021] A lifting ring was welded onto the inner side of the new wear-resistant plate using carbon dioxide welding.

[0022] Grinding removes paint, rust, and oil from the weld area;

[0023] Install the new wear-resistant plate and perform tack welding.

[0024] When making the root pass, the wire extension range is 15 to 20 mm.

[0025] Before the installation and tack welding of the new wear-resistant plate, the following steps are also included:

[0026] Preheat the area to be welded and the area within 50 mm on both sides to a temperature of 120 degrees Celsius.

[0027] After the installation and tack welding of the new wear-resistant plate, the process further includes:

[0028] Cover the weld with insulating cotton to allow the weld to cool slowly.

[0029] After the bevel is filled with weld, a 10mm weld leg is then welded to smoothly transition with the base material.

[0030] After the installation and tack welding of the new wear-resistant plate, the process further includes:

[0031] Visual inspection and magnetic particle testing were performed 48 hours after welding.

[0032] The present invention provides a method for replacing wear-resistant plates on a self-elevating wind power installation platform. A first I-beam is installed at the leg pin hole position on the upper wear-resistant plate, and a second and third I-beam are installed above and below the lower wear-resistant plate, respectively. The first center of the circle containing the first I-beam, the second center of the circle containing the second I-beam, and the third center of the circle containing the third I-beam are determined. Using a total station, it is determined whether the first, second, and third centers are on the same straight line. If they are on the same straight line, this is determined as the centerline, and the upper and lower wear-resistant plates are removed. Based on the centerline, the deviation value of the groove in the wear-resistant plate is determined, and based on the deviation value, the new wear-resistant plate is processed. The new wear-resistant plate is then installed and welded.

[0033] The method for replacing wear-resistant plates on this self-elevating wind turbine installation platform has the following advantages: the center line of the pile leg is determined by the first, second, and third center points, thereby determining the deviation value of the groove of each wear-resistant plate. Then, the corresponding new wear-resistant plate is processed according to the deviation value, so that the distance between each new wear-resistant plate and the center line is the same after installation. This avoids inaccurate installation of the new wear-resistant plate due to damage or deformation of the pile leg, improves the installation accuracy of the new wear-resistant plate, and ensures the performance and life of the pile leg. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a flowchart illustrating the method for replacing the wear-resistant plates of the self-elevating wind power installation platform provided by the present invention.

[0036] Figure 2 This is a schematic diagram of the distribution of wear-resistant plates on the pile legs provided by the present invention;

[0037] Figure 3 This is a schematic diagram of determining the center of a circle provided by the present invention. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0039] This invention provides an embodiment of a method for replacing wear-resistant plates on a self-elevating wind power installation platform. It should be noted that although the logical order is shown in the flowchart, under certain data conditions, the steps shown or described may be completed in a different order than that shown here.

[0040] Reference Figure 1 , Figure 1 This is a flowchart illustrating the method for replacing the wear-resistant plates of a self-elevating wind turbine installation platform provided by the present invention. The method for replacing the wear-resistant plates of a self-elevating wind turbine installation platform provided in this embodiment of the invention includes:

[0041] Step 101: Install the first I-beam at the pile leg pin hole position of the upper wear-resistant plate, and install the second and third I-beams above and below the lower wear-resistant plate respectively; the upper and lower wear-resistant plates are the wear-resistant plates to be replaced installed on the pile leg;

[0042] Step 102: Determine the first center of the circle containing the first I-beam, determine the second center of the circle containing the second I-beam, and determine the third center of the circle containing the third I-beam;

[0043] Step 103: Based on the total station, determine whether the first center, the second center, and the third center are on the same straight line;

[0044] Step 104: If they are on the same straight line, then determine it as the center line and remove the upper wear-resistant plate and the lower wear-resistant plate;

[0045] Step 105: Based on the centerline, determine the deviation value of the wear-resistant plate groove, and process the new wear-resistant plate based on the deviation value; the wear-resistant plate groove is the groove left on the pile leg after the wear-resistant plate is removed;

[0046] Step 106: Install and weld the new wear-resistant plate.

[0047] Specifically, this embodiment of the invention will use the "Huaxianglong" wind power platform retrofit as an example to illustrate the method for replacing the wear-resistant plates of the self-elevating wind power installation platform described in this invention. In this embodiment, each pile leg has 16 lower wear-resistant plates and 16 upper wear-resistant plates, wherein the upper and lower wear-resistant plates are the wear-resistant plates to be replaced installed on the pile leg. Figure 2 As shown, Figure 2 This is a schematic diagram of the distribution of wear-resistant plates on the pile legs provided by the present invention. The distribution of each pile leg is shown in cross-section, and it can be clearly seen that the distribution of wear-resistant plates is symmetrical.

[0048] Further, after the platform enters the dock and the pile legs in the lower wear-resistant plate area are removed, two I-beams are installed at appropriate positions above and below the lower wear-resistant plate, namely the second and third I-beams; one I-beam is installed at the position corresponding to the pile leg pin hole on the upper wear-resistant plate, namely the first I-beam. It should be noted that the number and specific positions of the I-beams can be determined according to the actual situation. Generally, the number of I-beams should be greater than 3.

[0049] Furthermore, the first center of the circle containing the first I-beam is determined, the second center of the circle containing the second I-beam is determined, and the third center of the circle containing the third I-beam is determined. In this embodiment, a steel measuring tape is used to measure the diameter of the wear-resistant plate in 16 equal parts around the circumference. The center point of the wear-resistant plate diameter is marked on the I-beam faceplate, and the center point is corrected by dividing the diameter into 16 equal parts, thereby initially determining the center of each circle. Figure 3 As shown, Figure 3 This is a schematic diagram of the determination of the center of the circle provided by the present invention, wherein the line passing through the center of the circle in the figure is the line connecting the centers of the two wear-resistant plates.

[0050] Furthermore, after the center of the circle is determined, the corresponding radius needs to be checked twice (3 points are measured for each guide block). Finally, the center point of the wear-resistant plate (i.e., the center of the circle) is determined on the I-beam panel, that is, the center point of the wear-resistant plate is determined on each of the three I-beam panels.

[0051] Furthermore, use a total station to check whether the first, second, and third centers of the circle are on a straight line. If they are not on a straight line, perform data analysis, correct the centers, and mark them on the I-beam panel to ensure that the first, second, and third centers are on the same vertical line. If they are on the same straight line, then that line is determined as the center line.

[0052] Furthermore, new wear-resistant plates are ordered according to the theoretical thickness and dimensions required by the pre-designed drawings, without leaving any processing allowance. The arc shape, end bevel, and inner surface smoothness of the new wear-resistant plates can all be processed by the manufacturer; the new wear-resistant plates are NM400 wear-resistant plates.

[0053] Next, remove the upper and lower wear-resistant plates. First, use a carbon planer to remove the old weld seam, leaving a 5mm "root," then grind away the "root" weld seam. Next, perform MT (magnetic particle inspection) on the base material at the old weld seam location. If defects are found during inspection, grind or repair weld the base material. Then, mark the installation lines for the new wear-resistant plates to facilitate their installation.

[0054] Furthermore, the deviation value of the wear-resistant plate groove is determined by the centerline, and the new wear-resistant plate is processed according to the deviation value. The wear-resistant plate groove is the groove left on the pile leg after the wear-resistant plate is removed. Specifically, based on the wear-resistant plate centerline, the radius of the cylinder, the diameter of the pile leg, and the gap between the wear-resistant plate and the pile leg are measured to determine the theoretical value from the center point to each wear-resistant plate groove. The measured value from the center point to each wear-resistant plate groove is then measured, and the measured value is subtracted from the theoretical value to obtain the deviation value, which is then converted into the processing amount of the new wear-resistant plate. It should be noted that each wear-resistant plate groove can be numbered and mapped one-to-one with the on-site measurement value.

[0055] Furthermore, the new wear-resistant plates are processed according to the deviation values. After processing, each new wear-resistant plate is installed onto the cylinder according to the drawings, using a clamping plate method to ensure that the new wear-resistant plate fits completely against the cylinder. After all are installed, the radius of the wear-resistant plate is measured along the center line to ensure that the gap between the pile leg and the wear-resistant plate is not less than 8 mm. The measurement table is checked before welding and the inspection is completed.

[0056] Furthermore, carbon dioxide welding was used to weld lifting rings onto the new wear-resistant plate to facilitate its hoisting and installation. CHT711 welding material was used. Before welding the lifting rings, the wear-resistant plate at the welding location was heated to 100 degrees Celsius with a flame. After welding, the weld was inspected to ensure there were no cracks. It should be noted that the guide plate wear-resistant plate dimensions are 40*1500*650 mm (arc length 651.8 mm), and the original guide plate material was HARDOX400.

[0057] Furthermore, the new wear-resistant steel plate is grade NM400. Inspect the machined surface and bevel of the wear-resistant steel plate; there should be no cracks or other defects. Grind away debris, including paint, oil, and rust, from the root of the bevel and within a 30mm radius of the bevel.

[0058] Furthermore, a lifting ring was welded onto the inner side of the new wear-resistant plate using carbon dioxide welding, with GFL-71Ni welding material used. Before welding the lifting ring, the wear-resistant plate at the welding location was heated to 120 degrees Celsius with a flame; after welding, it was kept at the temperature and slowly cooled. After cooling to room temperature, the weld was inspected, and no cracks or other defects were found. Further, the position of the new guide block wear-resistant plate was marked, and paint, rust, oil, and other contaminants at the weld location were removed by grinding.

[0059] Further, the wear-resistant plate is installed, and tack welding is performed. Preheating to 120℃ is required before tack welding. The tack weld length should be no less than 50 mm, and two passes are required. When the gap between the wear-resistant plate and the EH36 steel is greater than 5 mm, a backing plate is locally installed on the EH36 plate according to the requirements of GB / T 34000-2016 China Shipbuilding Quality Standard, Section 5.1.6.1.1. Carbon dioxide welding is used, and 4Ys (GFL-71Ni) welding material is selected. The welding parameters are shown in Table 1.

[0060] Table 1

[0061]

[0062] Furthermore, the 16 new wear-resistant plates in the entire circle are welded in an alternating manner; when making the root pass, the wire extension is controlled to be 15 to 20 mm, and the welding gun angle is controlled to ensure good fusion between the weld and the base material on both sides.

[0063] Furthermore, the weld is preheated to 120 degrees Celsius, and the preheating range is the weld seam and 50 mm on both sides. The temperature is measured 50 mm outside the preheating range.

[0064] The interpass temperature range is 120 to 200 degrees Celsius. After welding, the weld is covered with insulation cotton for slow cooling. After filling the bevel, a 10 mm weld leg is welded, ensuring a smooth transition with the base metal. 48 hours after welding, a visual inspection is performed, checking for cracks, slag inclusions, porosity, and undercut deeper than 0.5 mm. Weld beads and spatter are removed by grinding. After passing the visual inspection, MT (magnetic particle testing) is performed according to CB standards, achieving Level II qualification.

[0065] The present invention provides a method for replacing wear-resistant plates on a self-elevating wind power installation platform. A first I-beam is installed at the leg pin hole position on the upper wear-resistant plate, and a second and third I-beam are installed above and below the lower wear-resistant plate, respectively. The first center of the circle containing the first I-beam, the second center of the circle containing the second I-beam, and the third center of the circle containing the third I-beam are determined. Using a total station, it is determined whether the first, second, and third centers are on the same straight line. If they are on the same straight line, this is determined as the centerline, and the upper and lower wear-resistant plates are removed. Based on the centerline, the deviation value of the groove in the wear-resistant plate is determined, and based on the deviation value, the new wear-resistant plate is processed. The new wear-resistant plate is then installed and welded.

[0066] The method for replacing wear-resistant plates on this self-elevating wind turbine installation platform has the following advantages: the center line of the pile leg is determined by the first, second, and third center points, thereby determining the deviation value of the groove of each wear-resistant plate. Then, the corresponding new wear-resistant plate is processed according to the deviation value, so that the distance between each new wear-resistant plate and the center line is the same after installation. This avoids inaccurate installation of the new wear-resistant plate due to damage or deformation of the pile leg, improves the installation accuracy of the new wear-resistant plate, and ensures the performance and life of the pile leg.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for replacing wear-resistant plates on a self-elevating wind turbine installation platform, characterized in that, include: A first I-beam is installed at the pile leg pin hole position on the upper wear-resistant plate, and a second I-beam and a third I-beam are installed above and below the lower wear-resistant plate, respectively; the upper wear-resistant plate and the lower wear-resistant plate are wear-resistant plates to be replaced installed on the pile leg; Determine the first center of the circle containing the first I-beam, determine the second center of the circle containing the second I-beam, and determine the third center of the circle containing the third I-beam; Using a total station, determine whether the first center, the second center, and the third center are on the same straight line; If they are on the same straight line, then this line is determined as the center line, and the upper wear-resistant plate and the lower wear-resistant plate are removed. Based on the centerline, the deviation value of the wear-resistant plate groove is determined, and based on the deviation value, the new wear-resistant plate is processed; the wear-resistant plate groove is the groove left on the pile leg after the wear-resistant plate is removed; The new wear-resistant plate was installed and welded.

2. The method for replacing the wear-resistant plates of a self-elevating wind power installation platform according to claim 1, characterized in that, The removal of the upper wear-resistant plate and the lower wear-resistant plate includes: Use a carbon planer to remove the old weld seam, leaving a 5 mm root; Grind away any remaining weld seams; Magnetic particle testing is performed on the base material at the old weld location. If defects are found, the base material is ground or repaired by welding.

3. The method for replacing the wear-resistant plates of a self-elevating wind power installation platform according to claim 1, characterized in that, The installation of the new wear-resistant plate includes: The new wear-resistant plate is installed onto the pile leg using a mounting plate method, ensuring that the gap between the pile leg and the new wear-resistant plate is not less than 8 mm.

4. The method for replacing the wear-resistant plates of a self-elevating wind power installation platform according to claim 1, characterized in that, The welding of the new wear-resistant plate includes: A lifting ring was welded onto the new wear-resistant plate using carbon dioxide welding. Grinding removes debris from the root of the bevel and within a 30 mm range of the bevel of the new wear-resistant plate; A lifting ring was welded onto the inner side of the new wear-resistant plate using carbon dioxide welding. Grinding removes paint, rust, and oil from the weld area; Install the new wear-resistant plate and perform tack welding.

5. The method for replacing the wear-resistant plate of a self-elevating wind power installation platform according to claim 4, characterized in that, When making the root pass, the wire extension range is 15 to 20 mm.

6. The method for replacing the wear-resistant plate of a self-elevating wind power installation platform according to claim 4, characterized in that, Before the installation and tack welding of the new wear-resistant plate, the following steps are also included: Preheat the area to be welded and the area within 50 mm on both sides to a temperature of 120 degrees Celsius.

7. The method for replacing the wear-resistant plates of a self-elevating wind power installation platform according to claim 4, characterized in that, After the installation and tack welding of the new wear-resistant plate, the process further includes: Cover the weld with insulating cotton to allow the weld to cool slowly.

8. The method for replacing the wear-resistant plate of a self-elevating wind power installation platform according to claim 4, characterized in that, After the bevel is filled with weld, a 10mm weld leg is then welded to smoothly transition with the base material.

9. The method for replacing the wear-resistant plate of a self-elevating wind power installation platform according to claim 4, characterized in that, After the installation and tack welding of the new wear-resistant plate, the process further includes: Visual inspection and magnetic particle testing were performed 48 hours after welding.

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