Bolt hole loosening laser detection device structure
By installing a laser detector with a laser transmitter and receiver inside the wind turbine tower, the problem of insufficient accuracy and reliability in bolt hole loosening detection in the existing technology has been solved, realizing automated bolt loosening detection and reducing the cost of offshore operations.
Patent Information
- Application Number
- CN202520130925.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Existing technologies for detecting loose bolt holes rely on time-consuming and experience-dependent manual methods, sensor detection requires direct contact and is easily affected by the environment, and acoustic detection is subject to noise interference in complex marine environments, resulting in insufficient detection accuracy and reliability.
A laser detection device is used. By installing laser transmitters and receivers inside the upper and lower wind turbine towers, the deviation of the laser signal is used to determine the looseness of the bolts, thereby achieving automatic calculation and precise positioning.
It enables precise positioning of loose bolts, improves the accuracy and reliability of detection, reduces the need for manual monitoring, and lowers assembly time and costs.
Smart Images
Figure CN223841442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of offshore wind power engineering, and in particular to the structure of a laser detection device for loose bolt holes. Background Technology
[0002] With the increasing global demand for clean energy, offshore wind power is gradually becoming an important direction for renewable energy development. Offshore wind farm equipment is subjected to extreme marine environmental conditions, including humidity, salt spray, and unstable wind speeds, posing a severe challenge to the structural safety of the equipment. As a critical connecting component in wind turbine equipment, bolt loosening is one of the main hidden dangers affecting the safety and reliability of the equipment.
[0003] Currently, methods for detecting bolt hole loosening mainly include manual periodic inspection, traditional sensor technology, and acoustic detection. Manual methods are time-consuming and rely heavily on operator experience, making them difficult to widely apply in large-scale wind farms. Furthermore, manual inspections often fail to detect deep-seated or hidden loosening problems in a timely manner. Sensors and strain gauges require direct contact with the bolts being tested to detect loosening, and are easily affected by environmental factors, leading to insufficient accuracy and reliability. While acoustic detection offers certain non-contact advantages, underwater noise and medium inhomogeneity in complex marine environments can interfere with the detection results. Based on these considerations, we propose a structure for a laser detection device for bolt hole loosening. Utility Model Content
[0004] To address the aforementioned issues of existing manual periodic inspections being difficult to widely apply in large-scale wind farms, sensor detection requiring direct contact with the bolts being tested and being susceptible to environmental factors leading to insufficient detection accuracy and reliability, and acoustic detection in complex marine environments where underwater noise and medium inhomogeneity can interfere with the detection results, this invention provides a structure for a laser detection device for loose bolt holes.
[0005] This utility model provides a structure for a laser detection device for loose bolt holes, employing the following technical solution:
[0006] A structure for a bolt hole loosening laser detection device includes an upper wind turbine tower and a lower wind turbine tower, with the lower wind turbine tower located below the upper wind turbine tower. The upper and lower wind turbine towers are connected by a plurality of bolts. A laser signal receiving band is installed on the inner wall of the upper wind turbine tower, and a plurality of laser emitters are installed on the inner wall of the lower wind turbine tower.
[0007] By adopting the above technical solution, when all bolt structures are secure, the four laser emitters emit laser signals. The laser signals received in the laser signal receiving band should be at the same height and on the same horizontal line. When a bolt structure becomes loose, the upper and lower wind turbine towers are not in complete contact. This causes the laser signal emitted by a certain laser emitter along its original laser path to be received in the laser signal receiving band at a lower position compared to the normal signal. At this time, the laser signal receiving band can determine the specific location of the loose bolt structure by the received signal, enabling the device to automatically calculate and accurately locate the position of the loose bolt structure.
[0008] Optionally, the number of laser emitters is set to four, and the four laser emitters are evenly distributed in a square at the four corners on the same horizontal plane.
[0009] By adopting the above technical solution, laser signals are emitted by multiple laser emitters, which enables the detection of loose bolt structures at multiple locations, making the detection results of the device more accurate.
[0010] Optionally, a laser path is provided between each of the four laser emitters and the laser signal receiving band, and each laser emitter can emit a laser signal along the laser path, with each laser path forming an angle of 45° with the vertical direction.
[0011] By adopting the above technical solution, four laser emitters emit laser signals along the same laser path at the same angle, thereby automatically calculating and accurately locating the position of loose bolts without the need for manual monitoring, which can effectively reduce assembly time and costs.
[0012] Optionally, the laser signal receiving strip is uniformly distributed in a strip shape at the same horizontal height.
[0013] By adopting the above technical solution, when a bolt structure becomes loose, the laser transmitter at the corresponding position will receive a lower signal on the laser signal receiving band along the original angle laser path. At this time, the laser signal receiving band can determine the specific location of the loose bolt structure by the received signal.
[0014] Optionally, multiple laser signal receiving devices are evenly distributed on the laser signal receiving band.
[0015] By adopting the above technical solution, the device can accurately receive laser signals from various locations during the detection process.
[0016] In summary, this utility model has at least one of the following beneficial effects:
[0017] By combining a laser transmitter and a laser signal receiver, the system can automatically calculate and accurately locate the positions of loose bolts, and display the looseness of bolts in real time. This significantly improves the safety of the connection between the upper and lower wind turbine towers. Furthermore, due to the simple structure of the device, no human monitoring is required after installation, which can effectively reduce assembly time and costs, reduce the workload of offshore operations, and achieve cost savings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a top view schematic diagram of the lower wind turbine tower structure of this utility model;
[0021] Figure 3 This is a top view schematic diagram of the upper wind turbine tower structure of this utility model;
[0022] Figure 4 This is a front view of the structure of this utility model. Figure 1 ;
[0023] Figure 5 This is a front view of the structure of this utility model. Figure 2 .
[0024] In the diagram: 1. Upper wind turbine tower; 2. Lower wind turbine tower; 3. Bolted structure; 4. Laser transmitter; 5. Laser path; 6. Laser signal receiving band. Detailed Implementation
[0025] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.
[0026] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 4 and Figure 5 The present invention provides an embodiment of a bolt hole loosening laser detection device, comprising an upper wind turbine tower 1 and a lower wind turbine tower 2, wherein the lower wind turbine tower 2 is located below the upper wind turbine tower 1, the upper wind turbine tower 1 and the lower wind turbine tower 2 are connected by a plurality of bolt structures 3, and a laser signal receiving band 6 is installed on the inner wall of the upper wind turbine tower 1.
[0027] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 2 The inner wall of the lower wind turbine tower 2 is equipped with several laser emitters 4. There are four laser emitters 4, which are evenly distributed in a square at the four corners on the same horizontal plane. By emitting laser signals from multiple laser emitters 4, the loosening of bolt structures 3 at multiple locations can be detected, making the detection results of the device more accurate.
[0028] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 4 and Figure 5 Each of the four laser emitters 4 and the laser signal receiving band 6 is connected by a laser path 5. Each laser emitter 4 can emit a laser signal along the laser path 5, and each laser path 5 makes a 45° angle with the vertical direction. This ensures that the four laser emitters 4 emit laser signals along the same laser path 5, thereby automatically calculating and accurately locating the position of the loose bolt structure 3 without the need for manual monitoring, effectively reducing assembly time and costs.
[0029] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 3 The laser signal receiving strip 6 is uniformly distributed in a strip shape at the same horizontal height. When a bolt structure 3 becomes loose, the laser transmitter 4 at the corresponding position will receive a lower signal on the laser signal receiving strip 6 along the original laser path 5 emitted at the original angle. At this time, the laser signal receiving strip 6 can determine the specific location of the loose bolt structure 3 by receiving the signal. Multiple laser signal receiving devices are evenly distributed on the laser signal receiving strip 6. This allows the device to accurately receive laser signals from various locations during the detection process.
[0030] Working principle: When all bolt structures 3 are secure, four laser emitters 4 emit laser signals along laser paths 5 at the same angle. The laser signals received in the laser signal receiving band 6 should be at the same horizontal level. When a bolt structure 3 becomes loose, the upper wind turbine tower 1 and the lower wind turbine tower 2 are not in complete contact. This causes the laser signal emitted by a laser emitter 4 near the opposite corner along the original laser path 5 to be received in the laser signal receiving band 6 at a lower angle compared to the normal signal. The laser signal receiving band 6 can then determine the location of the loose bolt structure 3 based on the received signal. This allows the device to automatically calculate and accurately locate the loose bolt structure 3. Furthermore, the device has a simple structure, requires no manual monitoring after installation, effectively reduces assembly time and costs, lowers the workload of offshore operations, and achieves cost savings.
[0031] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A structure for a laser detection device for loose bolt holes, comprising an upper wind turbine tower (1) and a lower wind turbine tower (2), wherein the lower wind turbine tower (2) is located below the upper wind turbine tower (1), characterized in that: The upper wind turbine tower (1) and the lower wind turbine tower (2) are connected by a number of bolt structures (3). The inner wall of the upper wind turbine tower (1) is equipped with a laser signal receiving band (6), and the inner wall of the lower wind turbine tower (2) is equipped with a number of laser transmitters (4).
2. The structure of the laser detection device for loose bolt holes according to claim 1, characterized in that: The number of laser emitters (4) is set to four, and the four laser emitters (4) are evenly distributed in a square at the four corners on the same horizontal plane.
3. The structure of the laser detection device for loose bolt holes according to claim 1, characterized in that: A laser path (5) is provided between each of the four laser emitters (4) and the laser signal receiving band (6). Each laser emitter (4) can emit a laser signal along the laser path (5). The angle between each laser path (5) and the vertical direction is 45°.
4. The structure of the laser detection device for loose bolt holes according to claim 1, characterized in that: The laser signal receiving band (6) is uniformly distributed in strip shape at the same horizontal height.
5. The structure of the laser detection device for loose bolt holes according to claim 1, characterized in that: Multiple laser signal receiving devices are evenly distributed on the laser signal receiving strip (6).