A positioning device for load test points on the tower barrel of a wind turbine

Abstract

A positioning device for load test points of a wind turbine tower barrel, comprising three laser emitters on the left, middle and right, a laser emitter mounting bracket, a linear guide rail, a slider, front and rear connecting rods, an L-shaped bracket, and front and rear connecting rod connecting ears. The included angle between the laser lines emitted by the left and right laser emitters is equal to 90°, and this included angle is bisected by the laser line emitted by the middle laser emitter. Two front connecting rod connecting ears are respectively fixedly connected to the left and right side walls of the slider, and two rear connecting rod connecting ears are respectively fixedly connected to the two side walls at the rear end of the linear guide rail. The distance between the axes of the vertical circular holes on the front connecting rod connecting ears is greater than the distance between the straight lines of the vertical circular holes on the rear connecting rod connecting ears. The intersection point of the laser lines emitted by the three laser emitters is located behind each component. The structure of the present invention is simple, and it can be simply and efficiently put into the positioning operation of the load test points of the wind turbine tower barrel, and is easy to store and keep.

Description

Technical Field

[0001] The present invention relates to the field of mechanical load testing of wind turbines, and more specifically, to a device for selecting load measurement points of a wind turbine. Background Art

[0002] The load testing of wind turbines is an important part of the design evaluation of wind power generation units. By measuring the loads of wind turbines, it is possible to determine whether the mechanical design of the wind turbines meets the standards. There are many test items, such as tower [tower base, tower middle, tower barrel] load testing, blade load testing, generator main shaft load testing, etc. Currently, the industry generally uses the method of strain gauge bridge connection to measure the mechanical loads of wind turbines. Since strain gauge bridge connection requires pasting strain gauges on parts such as the tower barrel wall and blade root of the wind turbine, it is necessary to select load measurement points at the corresponding parts before pasting the strain gauges. For example, when testing the tower load, to ensure the accuracy of the test results, the load measurement points must be distributed at the four equal division points of the intersection line between a circular plane perpendicular to the tower axis and the tower wall of the tower barrel. This involves the problem of how to determine the load test points. Currently, on the tower barrel wall, a tape measure and double-sided tape are usually used to select the load measurement points. This method first pastes a circle of double-sided tape along the wall surface on a certain circular section of the tower barrel wall, then pastes a circle of tape measure along the double-sided tape to measure the circumference of the circular section and select the four equal division points, and finally marks the load measurement points at the four equal division points. Only then is the point selection work completed. This point selection method is time-consuming and laborious, greatly reducing the test efficiency and being unfavorable for the subsequent test process.

[0003] The invention patent publication document with the application number CN202010546898.8 and the title of "A strain gauge positioning device and method for tower load testing of a wind turbine" discloses a strain gauge positioning device for tower load testing of a wind turbine: including a first laser, a second laser, and a third laser arranged on a guide rail in sequence from left to right. The second laser is arranged at the midpoint position of the guide rail, and both the first laser and the third laser can reciprocally slide along the extending direction of the guide rail; all three lasers can emit laser beams in both forward and reverse directions, and the laser beam emitted by the second laser is perpendicular to the extending direction of the guide rail. The laser beam emitted by the first laser forms a 45-degree angle with the laser beam emitted by the second laser, and the laser beam emitted by the third laser is perpendicular to the laser beam emitted by the first laser. Since the relative positions [angles and horizontal positions] of its three lasers need to be adjusted and positioned immediately at the use site rather troublesome, there is a problem of low use efficiency, and the overall structure is also relatively complex and not easy to store and keep. Summary of the Invention

[0004] The main object of the present invention is to provide a positioning device for load measurement points of a wind turbine tower barrel with a simple overall structure and convenient use.

[0005] The technical solution adopted in the present invention is as follows: A positioning device for load test points of a wind turbine tower barrel, comprising a left laser emitter, a middle laser emitter, and a right laser emitter, a laser emitter mounting bracket, a linear guide rail, a slider, a front connecting rod, a rear connecting rod, an L-shaped bracket, a front connecting rod connecting ear, and a rear connecting rod connecting ear. The three laser emitters can all emit laser beams forward and backward.

[0006] The laser emitter mounting bracket includes a left arm, a middle arm, a right arm, and a base. The left arm includes a front section of the left arm and a rear section of the left arm, and the right arm includes a front section of the right arm and a rear section of the right arm. The rear section of the left arm, the middle arm, and the rear section of the right arm are fixedly connected together during use; the base is fixed to the rear end of the linear guide rail, and the middle arm is fixed to the mounting bracket base; the left laser emitter, the middle laser emitter, and the right laser emitter are respectively fixed to the front section of the left arm, the middle arm, and the front section of the right arm. The included angle between the laser lines emitted by the left laser emitter and the right laser emitter is equal to 90°, and this included angle is bisected by the laser line emitted by the middle laser emitter. Two front connecting rod connecting ears are respectively fixedly connected to the left and right side walls of the slider, and two rear connecting rod connecting ears are respectively fixedly connected to the two side walls of the rear end of the linear guide rail;

[0007] There is a vertical circular hole on each of the two front connecting rod connecting ears and the two rear connecting rod connecting ears. The distance between the axes of the vertical circular holes on the two front connecting rod connecting ears is greater than the distance between the straight lines of the vertical circular holes on the two rear connecting rod connecting ears. The upper and lower bases of the isosceles trapezoid determined by the four vertical circular holes are bisected by the laser line emitted by the middle laser emitter;

[0008] The left ends of the front connecting rod and the rear connecting rod on the left side are hinged to each other, and a left magnet cylinder block is provided on the hinge shaft. The right ends are respectively hinged to the front connecting rod connecting ear and the rear connecting rod connecting ear by using the corresponding vertical circular holes; the right ends of the front connecting rod and the rear connecting rod on the right side are hinged to each other, and a right magnet cylinder block is provided on the hinge shaft. The left ends are respectively hinged to the front connecting rod connecting ear and the rear connecting rod connecting ear by using the corresponding vertical circular holes;

[0009] The upper end of one support arm of the L-shaped bracket is fitted and fixedly connected to the lower surface of the rear end of the linear guide rail, and a square magnet block is fixedly provided at the rear end of the other support arm of the L-shaped bracket;

[0010] The intersection point of the laser lines emitted by the three laser emitters is located behind each component.

[0011] Here, the connection end of the linear guide rail and the laser emitter mounting bracket is defined as the rear end of the linear guide rail, and the end of the linear guide rail away from the laser emitter mounting bracket is defined as the front end of the linear guide rail. When a person stands in front of the front end of the linear guide rail facing the laser emitter mounting bracket, the left side of the person is defined as the left, and the right side of the person is defined as the right. In addition, during installation, it should be noted that the vertical plane of the laser line emitted by the middle laser emitter bisects the linear guide rail into left and right halves, the connection line of the connection points of the front and rear connecting rods on the left and right sides is perpendicular to the laser line emitted by the middle laser emitter, and the slider can move smoothly on the linear guide rail. During use, the present invention can move the slider back and forth along the measured wind turbine tower barrel, so that the circular plane determined by the contact points of the two front and rear connecting rods on the left side and the two front and rear connecting rods on the right side with the wind turbine tower barrel and the intersection point of the laser lines emitted by the three laser emitters is perpendicular to the axis of the wind turbine tower barrel. After use, the slider can be pulled towards the front end, and finally, by relying on the magnets at the hinge parts of the front and rear connecting rods on the left side and the magnets at the hinge parts of the front and rear connecting rods on the right side, the front and rear connecting rod parts on both sides are attached to the corresponding side surfaces of the linear guide rail, thus facilitating the storage and preservation of the present invention. Since the relative positions among the three laser emitters are fixed before use and do not need to be adjusted on-site during use, the present invention can be efficiently put into use at the measurement site. Therefore, the present invention is a very excellent positioning device for the load test points of wind turbine tower barrels.

[0012] Preferably, there are also two spirit levels, which are respectively arranged on two of the three components of the linear guide rail, the front connecting rod, and the rear connecting rod. This preferred solution is conducive to ensuring that the four measurement points are adjusted to be on the same circumference.

[0013] Preferably, V-grooves adapted to the left laser emitter, the middle laser emitter, and the right laser emitter are respectively provided on the front section of the left arm, the middle arm, and the front section of the right arm, and the left laser emitter, the middle laser emitter, and the right laser emitter are placed in the corresponding V-grooves. Further preferably, the width of the front section of the left arm is twice the width of the rear section of the left arm, and the width of the front section of the right arm is twice the width of the rear section of the right arm; the left side surface of the rear section of the left arm bisects the front section of the left arm, and the V-groove on the front section of the left arm is bisected by the left side surface of the rear section of the left arm; the right side surface of the rear section of the right arm bisects the front section of the right arm, and the V-groove on the front section of the right arm is bisected by the right side surface of the rear section of the right arm. This preferred solution facilitates the accurate and rapid positioning and fixation of the three laser emitters.

[0014] Preferably, both the rear section of the left arm and the rear section of the right arm are hinged to the rear end of the middle arm, and the hinge axis is located in front of the intersection point of the laser lines emitted by the left laser emitter, the middle laser emitter, and the right laser emitter. This preferred solution is conducive to further reducing the storage and preservation space of the present invention.

[0015] In summary, the structure of the present invention is simple, which can be simply and efficiently put into the positioning operation of the load test points of the wind turbine tower barrel, and is easy to store and keep. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : Three-dimensional schematic diagram of the structure of Embodiment 1 of the present invention;

[0017] Figure 2 : Schematic diagram of the structure of Embodiment 1 of the present invention;

[0018] In the figure: left laser emitter 1, middle laser emitter 2, right laser emitter 3, laser emitter mounting bracket 4, left arm 4.1, middle arm 4.2, right arm 4.3, base 4.4, linear guide rail 5, slider 6, front connecting rod 7, rear connecting rod 8, L-shaped bracket 9, front connecting rod connecting ear 10, rear connecting rod connecting ear 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present invention will be further specifically described below through embodiments and in conjunction with the drawings.

[0020] Embodiment 1:

[0021] As shown in Figure 1 , Figure 2 , the present invention includes a left laser emitter 1, a middle laser emitter 2, a right laser emitter 3, a laser emitter mounting bracket 4, a linear guide rail 5, a slider 6, a front connecting rod 7, a rear connecting rod 8, an L-shaped bracket 9, a front connecting rod connecting ear 10, a rear connecting rod connecting ear 11, and components such as a spirit level, a hinge shaft, bolts, nuts and corresponding gaskets not shown in the figure. The three laser emitters can all emit laser beams forward and backward.

[0022] The laser emitter mounting bracket 4 includes a left arm 4.1, a middle arm 4.2, a right arm 4.3, and a base 4.4. The left arm 4.1 includes a front section of the left arm and a rear section of the left arm, and the right arm 4.3 includes a front section of the right arm and a rear section of the right arm. The rear section of the left arm, the middle arm and the rear section of the right arm are connected into an integral structure. The base 4.4 is fixed at the rear end of the linear guide rail 5, and the middle arm 4.2 is fixed on the base 4.4; the left laser emitter 1, the middle laser emitter 2, and the right laser emitter 3 are respectively fixed on the front section of the left arm, the middle arm 4.2, and the front section of the right arm. The included angle between the laser lines emitted by the left laser emitter 1 and the right laser emitter 3 is equal to 90° and this included angle is bisected by the laser line emitted by the middle laser emitter 2; the two front connecting rod connecting ears 10 are respectively fixedly connected to the left and right side walls of the slider 6, and the two rear connecting rod connecting ears 11 are respectively fixedly connected to the two side walls at the rear end of the linear guide rail 5.

[0023] Both of the two front link connecting ears 10 and both of the two rear link connecting ears 11 are provided with a vertical round hole. The distance between the axes of the vertical round holes on the two front link connecting ears 10 is greater than the distance between the straight lines of the vertical round holes on the two rear link connecting ears 11. The upper and lower bases of the isosceles trapezoid determined by the four vertical round holes are bisected by the laser line emitted by the middle laser emitter 2;

[0024] The left ends of the front link 7 and the rear link 8 on the left side are hinged to each other, and a left magnet cylinder block (not shown in the figure) is provided on the hinge axis [which is arranged below the front link 7 on the left side and is provided with a anti-fragmentation protection thin layer. When the storage is completed, the upper surface of the left magnet cylinder block and the iron sheet fixed on the corresponding part of the linear guide are attracted to each other], and the right ends are respectively hinged to the front link connecting ear 10 and the rear link connecting ear 11 by using the corresponding vertical round holes. The right ends of the front link 7 and the rear link 8 on the right side are hinged to each other, and a right magnet cylinder block (not shown in the figure) is provided on the hinge axis [which is arranged below the front link 7 on the right side and is provided with a anti-fragmentation protection thin layer. When the storage is completed, the upper surface of the right magnet cylinder block and the iron sheet fixed on the corresponding part of the linear guide are attracted to each other], and the left ends are respectively hinged to the front link connecting ear 10 and the rear link connecting ear 11 by using the corresponding vertical round holes. Here, the left end connecting parts of the front link 7 and the rear link 8 on the left side are attracted and connected to the wall of the wind turbine tower by the left magnet cylinder block, and the right end connecting parts of the front link 7 and the rear link 8 on the left side are attracted and connected to the wall of the wind turbine tower by the right magnet cylinder block.

[0025] The upper end of one support arm of the L-shaped bracket 9 is fixedly attached to the lower surface of the rear end of the linear guide. A square magnet block (not shown in the figure) [the outer surface of the square magnet block is provided with an anti-fragmentation protection layer] is fixedly provided at the rear end of the other support arm of the L-shaped bracket 9. The intersection point of the laser lines emitted by the three laser emitters is located behind each component.

[0026] In the present invention, there are two spirit levels, and the two spirit levels are respectively fixedly provided on the front link 7 and the rear link 8. The specific structural details are simple technologies and will not be elaborated here.

[0027] Preferably, V-shaped grooves adapted to the left laser emitter 1, the middle laser emitter 2, and the right laser emitter 3 are respectively provided on the front section of the left arm, the middle arm 4.2, and the front section of the right arm, and the left laser emitter 1, the middle laser emitter 2, and the right laser emitter 3 are placed in the corresponding V-shaped grooves. Further preferably, the width of the front section of the left arm is twice the width of the rear section of the left arm, and the width of the front section of the right arm is twice the width of the rear section of the right arm; the left side surface of the rear section of the left arm bisects the front section of the left arm, and the V-shaped groove on the front section of the left arm is bisected by the left side surface of the rear section of the left arm; the right side surface of the rear section of the right arm bisects the front section of the right arm, and the V-shaped groove on the front section of the right arm is bisected by the right side surface of the rear section of the right arm.

[0028] Other structural details of the present invention are not elaborated here because they are simple technologies and have been shown in the drawings.

[0029] Embodiment 2:

[0030] In the first embodiment, the rear section of the left arm, the middle arm and the rear section of the right arm are connected to form an integral structure. In this embodiment, the rear ends of the rear sections of the left arm and the right arm are hinged to the middle arm, and the hinge axis and the corresponding entities are located in front of the intersection of the laser lines emitted by the left laser emitter 1, the middle laser emitter 2, and the right laser emitter 3. When in use, it is opened and fixed in a determined relative position, and the front ends of the rear sections of the left arm and the right arm are retracted and fixed to the left and right sides of the middle arm. The specific structural details are simple technologies and are not described here.

[0031] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation structure and implementation scope of the present invention. In fact, some equivalent changes can also be made according to the shape, structure and design purpose described in the present invention. Therefore, all equivalent changes made according to the shape, structure and design purpose described in the present invention should be included in the protection scope of the present invention, that is, these equivalent changes should be protected by the present invention.

Claims

1. A positioning device for load test points of a wind turbine tower barrel, comprising three laser emitters on the left, middle, and right that can emit laser beams back and forth, characterized in that: It also includes a laser emitter mounting bracket (4), a linear guide rail (5), a slider (6), a front connecting rod (7), a rear connecting rod (8), an L-shaped bracket (9), a front connecting rod connecting ear (10), and a rear connecting rod connecting ear (11); The laser emitter mounting bracket (4) includes a left arm (4.1), a middle arm (4.2), a right arm (4.3), and a base (4.4); the left arm includes a front section of the left arm and a rear section of the left arm, and the right arm includes a front section of the right arm and a rear section of the right arm; the rear section of the left arm, the middle arm, and the rear section of the right arm are fixedly connected together during use; the base is fixed to the rear end of the linear guide rail, and the middle arm is fixed to the base; the left, middle, and right laser emitters are respectively fixed to the front section of the left arm, the middle arm, and the front section of the right arm, and the included angle between the laser lines emitted by the left and right laser emitters is equal to 90° and this included angle is bisected by the laser line emitted by the middle laser emitter; two front connecting rod connecting ears are respectively fixedly connected to the left and right side walls of the slider, and two rear connecting rod connecting ears are respectively fixedly connected to the two side walls at the rear end of the linear guide rail; Both of the two front connecting rod connecting ears and the two rear connecting rod connecting ears are provided with a vertical circular hole; the distance between the axes of the vertical circular holes on the two front connecting rod connecting ears is greater than the distance between the straight lines of the vertical circular holes on the two rear connecting rod connecting ears, and the upper and lower bases of the isosceles trapezoid determined by the four vertical circular holes are bisected by the laser line emitted by the middle laser emitter; The left ends of the left front connecting rod and the left rear connecting rod are hinged to each other and a left magnet cylinder block is provided on the hinge shaft, and the right ends are respectively hinged to the front connecting rod connecting ear and the rear connecting rod connecting ear by using the corresponding vertical circular holes; the right ends of the right front connecting rod and the right rear connecting rod are hinged to each other and a right magnet cylinder block is provided on the hinge shaft, and the left ends are respectively hinged to the front connecting rod connecting ear and the rear connecting rod connecting ear by using the corresponding vertical circular holes; The upper end of one support arm of the L-shaped bracket is fitted and fixedly connected to the lower surface of the rear end of the linear guide rail, and a square magnet block is fixedly provided at the rear end of the other support arm of the L-shaped bracket; The intersection point of the laser lines emitted by the three laser emitters is located behind each component.

2. The positioning device for the load test points of the wind turbine tower barrel according to claim 1, wherein: It also includes two spirit levels, and the two spirit levels are respectively arranged on two of the three components of the linear guide rail (5), the front connecting rod (7), and the rear connecting rod (8).

3. A positioning device for a load test point of a wind turbine tower barrel according to claim 1, characterized in that: V-shaped grooves adapted to the left laser emitter (1), the middle laser emitter (2), and the right laser emitter (3) are respectively provided on the front section of the left arm, the middle arm (4.2), and the front section of the right arm, and the left laser emitter (1), the middle laser emitter (2), and the right laser emitter (3) are placed in the corresponding V-shaped grooves.

4. The positioning device for the load test points of the wind turbine tower according to claim 3, characterized in that: The width of the front section of the left arm is twice the width of the rear section of the left arm, and the width of the front section of the right arm is twice the width of the rear section of the right arm; the left side surface of the rear section of the left arm bisects the front section of the left arm, and the V-shaped groove on the front section of the left arm is bisected by the left side surface of the rear section of the left arm; the right side surface of the rear section of the right arm bisects the front section of the right arm, and the V-shaped groove on the front section of the right arm is bisected by the right side surface of the rear section of the right arm.

5. The positioning device for the load test points of the wind turbine tower barrel according to claim 1, characterized in that: Both the rear section of the left arm and the rear section of the right arm are hinged to the rear end of the middle arm (4.2), and the hinge axis is located in front of the intersection point of the laser lines emitted by the left laser emitter (1), the middle laser emitter (2), and the right laser emitter (3).

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