Flatness measuring method for fragmented tower drum flange

Abstract

The invention relates to the technical field of wind power tower drum measurement, in particular to a method for measuring planeness of segmented tower drum flanges, which comprises the following steps of: 1, connecting segmented flanges of adjacent tower drum segments through connecting pieces so as to fix the segmented flanges into an integral circular ring, the connecting piece is provided with an avoiding structure used for allowing measuring equipment to make contact with the end face of the fragmented flange. Step 2, adjusting a measurement position through a liftable and translational measurement platform, and performing multi-point data acquisition on the surface of the fragmented flange by using measurement equipment; and step 3, calculating a plane error degree based on the collected multi-point data. The problem that a traditional anchor bolt tool shields the segmentation position of the flange is solved, it is ensured that measurement covers the whole circumference of the fragmented flange, and error accumulation caused by data missing is avoided. And through the measuring platform capable of lifting and translating, the measuring position can be quickly adjusted to adapt to the fragmented flanges with different diameters and heights, and the measuring efficiency of the large-size flange is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine tower measurement, and particularly to a method for measuring the flatness of segmental tower flange planes. Background Art

[0002] In large-scale structure fields such as wind power generation and chemical equipment, the tower is a core support component, and its manufacturing accuracy directly affects the stability and safety of the overall structure. As a key connection component between tower segments, the flatness error of the flange may cause uneven bolt stress, seal failure, or local stress concentration, which may further lead to structural deformation or even safety hazards. Therefore, accurate measurement of the flange flatness is an essential link in the manufacturing and assembly process of the tower.

[0003] The annular flange of traditional towers is usually of an integral structure, in a circular ring shape, and the flatness measurement method is relatively simple and mature. With the increasing demand for large-scale tower transportation, the segmental flange technology has emerged. This technology divides the flange longitudinally into several segments, which are assembled on-site and then welded into a whole.

[0004] However, when measuring the flatness of the annular flange at the end face of the segmental flange of the tower, since the flange needs to be joined at the seam through an anchor bolt tooling (bolts and brackets for temporary fixation) to maintain the overall roundness. However, the tooling itself will block the measurement points in the flange division area, forming a measurement blind spot at the seam, resulting in the inability of traditional measurement tools to directly obtain the true data at the seam, causing error accumulation. In addition, the diameter of the segmental flange usually exceeds 10 meters, and it is difficult for traditional scaffolding or fixed measurement platforms to safely cover the entire circumference, and manual adjustment of the measurement points is inefficient and prone to introducing human errors. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for measuring the flatness of segmental tower flange planes to solve the problems of measurement blind spots and low measurement efficiency existing in segmental flanges.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: A method for measuring the flatness of segmental tower flange planes, comprising the following steps: Step 1: Connect the segmental flanges of adjacent tower segments through a connecting member to fix the segmental flanges into an integral ring, and an avoidance structure for allowing a measurement device to contact the end face of the segmental flange is provided on the connecting member; Step 2: Adjust the measurement position through a liftable and translatable measurement platform, and use the measurement device to collect multi-point data on the surface of the segmental flange; Step 3: Calculate the plane error degree based on the collected multi-point data.

[0007] Preferably, the connecting member is an arc-shaped connecting plate, and the avoiding structure includes a plurality of grooves respectively arranged along the inner arc edge and the outer arc edge of the arc-shaped connecting plate.

[0008] More preferably, a plurality of mounting holes are arranged along the length direction of the middle part of the arc-shaped connecting plate, and the mounting holes are matched with the holes on the segmented flange for detachable connection with the segmented flange.

[0009] More preferably, the width of the arc-shaped connecting plate is matched with the width of the segmented flange.

[0010] More preferably, the measuring platform is slidably connected to the lifting guide rail, the upper and lower ends of the lifting guide rail are slidably connected to the horizontal guide rail, and the direction of the horizontal guide rail is parallel to the axial direction of the tower barrel, so that the measuring platform can move axially along the segmented flange.

[0011] More preferably, the multi-point data acquisition adopts a laser tracker or a laser level.

[0012] More preferably, before measurement, the assembled tower barrel segments are placed on the supporting components, and the supporting components include at least three supporting frames arranged at intervals along the length direction of the tower barrel segments.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By arranging the avoiding structure on the connecting member, the measuring device can directly contact the end face of the segmented flange, completely solving the problem of the blockage of the traditional anchor bolt tooling to the flange split, ensuring that the measurement covers the entire circumference of the segmented flange (including the joint area), and avoiding the error accumulation caused by data loss.

[0014] Through the liftable and translatable measuring platform, the measuring position can be quickly adjusted to adapt to segmented flanges with different diameters and heights, significantly improving the measuring efficiency of large-sized flanges and reducing the manual operation risk at the same time. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the connection relationship between the segmented flange and the arc-shaped connecting plate in the embodiment; Figure 2 It is a schematic diagram of the structure of the arc-shaped connecting plate in the embodiment; Figure 3 It is a schematic diagram of the structure of the segmented flange in the embodiment; Figure 4 It is a schematic diagram of the positional relationship between the segmented tower barrel and the measuring platform in the embodiment.

[0016] In the figure: 1 - segmented flange, 2 - arc-shaped connecting plate, 2a - groove 2b - mounting hole, 3 - lifting guide rail, 4 - measuring platform 5 - Support frame. Specific implementation manner

[0017] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation manner does not limit the present invention.

[0018] It should be noted in advance that in the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through other features therebetween.

[0019] As Figures 1 to 3 shown, a method for measuring the flatness of a segmented tower barrel flange includes the following steps: Step 1: Fixing and connecting the segmented flange.

[0020] Place the segmented tower barrel to be measured on at least three support frames 4 spaced along its length direction to ensure that the segmented flange 1 is horizontal and without deformation. In this embodiment, the tower barrel segments are three. Before connection, the upper tower barrel segment can be kept at a certain height by a crane. Use the arc-shaped connecting plate 2 as a connecting member. Align the mounting holes 2b on it with the bolt holes of the segmented flange 1, and use bolts to fix the adjacent segmented flanges 1, so that the three segmented flanges 1 form an integral ring.

[0021] Among them, the width of the arc-shaped connecting plate 2 needs to match the width of the segmented flange 1. Multiple grooves 2a are provided on both the inner arc and outer arc edges, so that the measuring device can directly contact the end face of the segmented flange 1 through the grooves to avoid obstruction. Check whether all the arc-shaped connecting plates 2 are firmly installed to ensure that the segmented flange 1 does not displace or deform during the measurement, and then proceed to the next step.

[0022] Step 2: Adjusting the measurement platform and data acquisition.

[0023] As Figure 4 shown, start the measurement platform 4. It adjusts its height through the lifting guide rail 3 and moves along the horizontal guide rail (the direction is parallel to the axial direction of the tower barrel) to the target measurement area. According to the diameter and height of the segmented flange 1, through a combination of lifting and translation operations, the measuring device (laser tracker or laser level) is used for measurement.

[0024] In this embodiment, taking a laser tracker as an example, multiple measurement points are first arranged on the surface of the segmented flange 1, usually evenly distributed along the circumference. Then, the laser tracker is used to measure the height coordinates of each point in turn. Finally, the measurement data is fitted by software to calculate the flatness error of the flange surface.

[0025] It should be noted that the implementation principle of the measurement platform 4 for lifting and moving is as follows: There are two horizontal guide rails, which are laid parallel to the axial direction of the tower barrel. The horizontal guide rails are slidably connected to the upper and lower ends of the lifting guide rail 3 through chutes, so that the lifting guide rail 3 can be translated integrally along the horizontal guide rail. The measurement platform 4 is meshed with the lifting guide rail 3 through a ball screw or a rack and pinion mechanism driven by a motor, and its precise lifting along the vertical direction of the lifting guide rail 3 is controlled by a servo motor. At the same time, the translation of the horizontal guide rail is driven by another group of motors, and stable axial movement is achieved through synchronous belt or chain drive.

[0026] Step 3: Data processing and flatness error calculation.

[0027] Based on the collected multi-point data, the flatness error is calculated. The processing of the data in this step can be implemented by using existing technical means, and this embodiment will not elaborate on this.

[0028] In addition, in order to save measurement costs, the traditional manual measurement method can also be used. Place a straight ruler or a flat ruler on the surface of the segmented flange 1, measure in different directions (such as radial and circumferential), use a feeler gauge to measure the maximum gap between the straight ruler and the flange surface, record the data, then use a spirit level to detect the levelness of the flange surface, record the inclination angle, and then use a micrometer to measure at multiple points on the flange surface and record the height deviation of each point. This method is simple and easy to implement, with low cost, and is suitable for experienced operators to implement or for preliminary detection.

[0029] The method for measuring the flatness of the segmented tower barrel flange provided by the above-mentioned embodiment fixes the segmented flange 1 by designing the arc-shaped connecting plate 2 with an avoidance structure, sets a groove 2a on the arc-shaped connecting plate 2 to avoid the measurement path, so that the measuring device can directly contact the surface at the flange splitting place; combined with the liftable and translatable measurement platform 4 to dynamically adjust the position, realizing the full-circumference multi-point data acquisition of large-size flanges, and finally calculating the flatness error through data fitting. The present invention completely eliminates the problem of the traditional anchor bolt tooling blocking the flange joint, ensuring the integrity and accuracy of the measurement data; the collaborative design of the slide rail type measurement platform and the special tooling significantly improves the measurement efficiency.

[0030] In order to enable those of ordinary skill in the art to more conveniently understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A method for measuring the flatness of a segmented tower flange, characterized in that: The following steps are involved: Step 1: connecting the segment flanges (1) of adjacent tower segments by means of a connecting piece so that the segment flanges (1) are fixed as an integral circular ring, wherein the connecting piece is provided with an avoidance structure for allowing a measuring device to contact an end face of the segment flange (1); Step 2: adjusting the measurement position by means of a measuring platform (4) that can be raised and lowered and translated, and using a measuring device to collect multi-point data on the surface of the segmented flange (1); Step 3: Calculate the plane error based on the collected multi-point data.

2. The method for measuring the flatness of a segmented tower flange according to claim 1, characterized in that: The connecting piece is an arc-shaped connecting plate (2), and the avoidance structure comprises a plurality of grooves (2a) respectively arranged along the inner arc edge and the outer arc edge of the arc-shaped connecting plate (2).

3. The method for measuring the flatness of a segmented tower flange according to claim 2, characterized in that: A plurality of mounting holes (2b) are provided in the middle of the arc-shaped connecting plate (2) along its length direction, and the mounting holes (2b) match the holes on the segmented flange (1) so as to be detachably connected to the segmented flange (1).

4. The method for measuring the flatness of a segmented tower flange according to claim 2, characterized in that: The width of the arc-shaped connecting plate (2) matches the width of the segmented flange (1).

5. The method for measuring the flatness of a segmented tower flange according to claim 1, characterized in that: The measuring platform (4) is slidably connected to the lifting guide rail (3), and the upper and lower ends of the lifting guide rail (3) are slidably connected to horizontal guide rails, and the direction of the horizontal guide rail is parallel to the axial direction of the tower, so that the measuring platform (4) can move axially along the segmented flange (1).

6. The method for measuring the flatness of a segmented tower flange according to claim 1, characterized in that: The multi-point data collection adopts a laser tracker or a laser leveler.

7. The method for measuring the flatness of a segmented tower flange according to claim 1, characterized in that: Before measurement, the assembled tower segments are placed on a support component, wherein the support component comprises at least three support frames (5) arranged at intervals along the length direction of the tower segments.

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