A steel structural member twist degree detection device

Abstract

The application discloses a kind of steel structure component distortion detection equipment, including support frame, the top of the support frame is equipped with the installation plate of movable arrangement, the bottom of the installation plate is equipped with rotatable vertical rod, the bottom of the connecting rod is rotatably connected with abutting rod, the outside of the vertical rod is equipped with connecting block, the connecting block is fixed with piston cylinder communicated with circular groove, the piston cylinder is slidably connected with moving piston, the moving piston is fixed with horizontal rod, and the end of the horizontal rod is fixed with laser range finder.The application sets up horizontal straight line movement and two detection modes of rotation, which can be used separately or in combination: the former is suitable for component single horizontal section distortion detection, and the latter is suitable for component overall distortion detection;Meanwhile, the moving stroke, rotation range and detection position of laser range finder can be flexibly adjusted, which is suitable for steel structure components of different sizes and different detection positions, and the detection coverage and applicability are strong.

Description

Technical Field

[0001] This invention relates to the field of steel structure engineering testing technology, and in particular to a device for testing the torsion of steel structure components. Background Technology

[0002] In the field of steel structure engineering, the torsional deformation of components such as rods, columns, and beams is a key hidden danger affecting the structural safety, stability, and service life. Torsion testing is a core part of steel structure production acceptance, installation, commissioning, and operation and maintenance monitoring, and must strictly adhere to relevant industry standards and geometric tolerance requirements. During processing, transportation, installation, and service, steel structures are susceptible to external forces, temperature changes, welding stress, and other factors, resulting in deformations such as cross-sectional warping and overall torsion. If the torsional degree exceeds the allowable range, it will lead to uneven stress on the structure, and in severe cases, cause safety accidents.

[0003] Currently, steel structure torsion testing mainly employs manual contact measurement and traditional optical measurement methods. Manual contact measurement relies on tools such as dial indicators and steel rulers, which are cumbersome, time-consuming, and labor-intensive. Measurement accuracy is significantly affected by human operation, and it is difficult to achieve efficient testing of high-altitude and large components, posing safety risks to personnel. Traditional optical measurement methods, such as total station measurement and digital imaging, can achieve non-contact testing, but they suffer from high equipment costs, complex operation, and cumbersome data processing. Furthermore, they struggle to accurately capture local deformations along the circumferential direction of the component surface, making it impossible to quickly achieve simultaneous detection of cross-sectional torsion and overall torsional deformation.

[0004] The prior art, disclosed in CN217083675U, discloses a device for detecting the torsion of steel structure components, relating to the technical field of steel structure component testing equipment. It includes a base, a column fixedly connected to the top of the base, and an angle scale engraved on the top of the base. A first testing element is slidably sleeved on the column, and a second testing element is slidably sleeved on the column above the first testing element. The first and second testing elements have the same structure.

[0005] Existing laser inspection technologies mostly use fixed-point measurements, which cannot achieve a full scan of the component surface around its perimeter and make it difficult to obtain continuous radial distance data. This results in deviations in the calculation of torsion and fails to meet the needs of efficient and accurate inspection on engineering sites.

[0006] Therefore, this application proposes a device for detecting the torsion of steel structure components. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned technical problems by providing a steel structure component torsion detection device.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A torsion testing device for steel structure components includes a support frame, a movable mounting plate on the top of the support frame, a rotatable vertical rod at the bottom of the mounting plate, a circular groove at the bottom of the vertical rod, a lifting piston slidably connected within the circular groove, a connecting rod fixed to the bottom of the lifting piston, a clamping rod rotatably connected to the bottom of the connecting rod, a connecting block outside the vertical rod, a piston cylinder communicating with the circular groove fixed on the connecting block, a movable piston slidably connected within the piston cylinder, a horizontal rod fixed on the movable piston, and a laser rangefinder fixed to the end of the horizontal rod. When the vertical rod rotates, it can drive the laser rangefinder to rotate. The laser rangefinder measures the distance between itself and the component, and the twist of the component can be calculated. If the lifting piston moves upward within the circular groove, it can compress the internal air into the piston cylinder, forcing the moving piston, horizontal rod, and laser rangefinder to move. Thus, the laser rangefinder can detect the torsion by moving horizontally along the surface of the component, or it can detect the torsion of the component by rotating it.

[0009] Preferably, a mounting frame is fixed on the support frame, a first motor is mounted on the mounting frame, a lead screw is fixed to the output end of the first motor, the lead screw is rotatably connected to the inner wall of the mounting frame, a first guide rail is mounted inside the mounting frame, a slide table is slidably connected to the first guide rail, and the lead screw passes through the slide table and is threadedly connected to it.

[0010] Preferably, a vertical plate is fixed to the upper end of the slide table, a horizontal plate is fixed to the upper end of the vertical plate, an electric push rod is installed on the horizontal plate, a drive rod is fixed to the output end of the electric push rod, and the drive rod is fixedly connected to the upper end of the mounting plate.

[0011] Preferably, the system further includes a guiding mechanism, which includes a sliding sleeve fixed to the mounting plate, and a second guide rail fixed to the bottom of the horizontal plate. The second guide rail is located inside the sliding sleeve and slides in cooperation with it.

[0012] Preferably, a sleeve is fixed to the outside of the vertical rod, the connecting block is sleeved on the sleeve and fixedly connected to it, and the mounting plate is provided with a drive mechanism for driving the sleeve to rotate.

[0013] Preferably, the drive mechanism includes a second motor mounted on the upper end of the mounting plate, a power shaft fixed to the output end of the second motor, a first gear fixedly connected to the power shaft, and a second gear fixed to the sleeve, wherein the first gear and the second gear mesh.

[0014] Preferably, it also includes a protective cover, which is fixed to the bottom of the mounting plate, and the sleeve passes through the protective cover and is rotatably connected to it.

[0015] Preferably, the horizontal rod is a rectangular rod, a guide ring is fixed inside the piston cylinder, and the horizontal rod passes through the guide ring and is slidably connected to it.

[0016] Preferably, a spring is fixed on the movable piston, and the other end of the spring is fixedly connected to the inner wall of the piston cylinder.

[0017] Preferably, the upper end of the clamping rod is connected to the connecting rod via a bearing, and the lower end of the clamping rod is tapered.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The laser detection stroke can be controlled by adjusting the moving distance of the lifting piston, adapting to the detection needs of components of different widths. It can also flexibly change the horizontal detection section, collect continuous distance data in real time, and accurately reflect the local distortion degree of the section through deviation calculation. The detection efficiency is far higher than that of manual contact measurement.

[0019] 2. The motor-driven gear transmission drives the laser rangefinder to rotate around the component, realizing omnidirectional scanning in the circumferential direction. This breaks through the limitations of traditional fixed-point measurement and can capture continuous radial distance data around the component surface, enabling comprehensive inspection of steel structure components and improving the accuracy of the inspection.

[0020] 3. The detection radius can be changed by adjusting the horizontal extension position of the laser rangefinder to adapt to steel structure components of different sizes. It can also flexibly control the rotation angle for targeted detection, making it highly applicable.

[0021] 4. This invention overcomes the problems of cumbersome operation, low accuracy and high-altitude operation risks of manual contact measurement, and also solves the defects of traditional optical measurement equipment such as high cost, complicated operation and inability to achieve continuous scanning; moreover, the equipment is easy to disassemble and maintain, can achieve non-contact, efficient and accurate detection, and can accurately acquire continuous radial distance data to meet the needs of efficient and accurate detection on the engineering site.

[0022] In summary, this invention provides two detection methods: horizontal linear movement and rotation, which can be used individually or in combination. The former is suitable for detecting the torsion of a single horizontal cross-section of a component, while the latter is suitable for detecting the overall torsion of a component. At the same time, the movement stroke, rotation range, and detection position of the laser rangefinder can be flexibly adjusted to adapt to steel structure components of different sizes and detection locations, resulting in strong detection coverage and applicability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a steel structure component torsion detection device proposed in this invention; Figure 2 This is a rear view of a steel structure component torsion detection device proposed in this invention; Figure 3 This is a front view of a steel structure component torsion detection device proposed in this invention; Figure 4 This is a schematic diagram of the mounting plate in a steel structure component torsion detection device proposed in this invention; Figure 5 This is a schematic diagram of the structure of the first gear and the second gear in a steel structure component torsion detection device proposed in this invention. Figure 6 This is a schematic diagram of the piston cylinder in a steel structure component torsion detection device proposed in this invention; Figure 7 This is a schematic diagram of the disassembled piston cylinder in a steel structure component torsion detection device proposed in this invention; Figure 8 This is a schematic diagram of the circular groove in a steel structure component torsion detection device proposed in this invention.

[0024] In the diagram: 1. Support frame, 2. Mounting frame, 3. First motor, 4. Lead screw, 5. Slide table, 6. Vertical plate, 7. Horizontal plate, 8. Electric push rod, 9. Mounting plate, 10. First guide rail, 11. Drive rod, 12. Protective cover, 13. Clamping rod, 14. Second motor, 15. Second guide rail, 16. Sliding sleeve, 17. Laser rangefinder, 18. Power shaft, 19. First gear, 20. Sleeve, 21. Second gear, 22. Vertical rod, 23. Connecting block, 24. Piston cylinder, 25. Horizontal rod, 26. Connecting rod, 27. Guide ring, 28. Moving piston, 29. Spring, 30. Lifting piston, 31. Circular groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figures 1-8 A steel structure component torsion testing device includes a support frame 1. The support frame, as the basic support component of the device, is made of high-strength steel and has an overall frame design. The bottom is provided with an anti-slip pad (not shown in the figure). The anti-slip pad is made of rubber and has anti-slip texture on the surface, which can increase the friction between the support frame and the ground, prevent the device from sliding during operation, and ensure the stability of the testing work. The upper end of the support frame 1 is used to place the steel structure component to be tested.

[0027] A mounting frame 2 is fixed to the support frame 1. The mounting frame 2 is a rectangular frame structure welded from steel plates. Its dimensions are adapted to the top dimensions of the support frame 1. It is fixedly connected to the support frame 1 with bolts, ensuring reliable connection and facilitating disassembly and maintenance. The function of the mounting frame 2 is to support components such as the first motor 3, the lead screw 4, and the first guide rail 10, providing a mounting foundation and guidance for the horizontal movement of the slide table 5. The inner wall of the mounting frame 2 is precision machined to ensure the installation accuracy of the lead screw 4 and the first guide rail 10, preventing the slide table 5 from jamming or shifting due to installation deviations, thus affecting the accuracy of the detection position.

[0028] To enable horizontal position adjustment of the mounting plate 9 and the detection components below it, and to adapt to the detection of steel structure components of different lengths and positions, this invention provides a horizontal moving mechanism consisting of a first motor 3, a lead screw 4, a slide table 5, and a first guide rail 10. This mechanism operates smoothly and is accurately positioned, enabling stepless adjustment of the detection components.

[0029] Specifically, the first motor 3 is fixedly mounted on one end of the mounting frame 2 by bolts. The first motor 3 is a servo motor, preferably model MF140D-2020, with a rated power of 1.5kW and a rated speed of 1500r / min. It has the advantages of stable speed, high positioning accuracy, and fast response speed, and can accurately control the rotation angle of the lead screw 4, thereby realizing the precise horizontal movement of the slide table 5. The output end of the first motor 3 is fixedly connected to the lead screw 4 through a coupling. The coupling is an elastic coupling, which can buffer the vibration during motor operation and prevent the vibration from being transmitted to the lead screw 4, affecting the rotation accuracy of the lead screw 4. It also facilitates the disassembly and assembly of the lead screw 4 and the motor output end.

[0030] The lead screw 4 is a ball screw, with both ends rotatably connected to the inner wall of the mounting frame 2 via bearings. The bearings are deep groove ball bearings, preferably model 6208, which have the advantages of flexible rotation, low friction, and high load-bearing capacity, ensuring the stability and smoothness of the lead screw 4 during rotation. The ball screw pitch is preferably 5mm, with a precision grade of C7, enabling precise movement of the slide table 5, with a movement accuracy of ±0.01mm, meeting the requirements of high-precision detection. The lead screw 4 passes through the slide table 5 and is threadedly connected to it. The slide table 5 has a nut adapted to the ball screw inside, which is fixedly connected to the slide table 5. When the lead screw 4 rotates under the drive of the first motor 3, the nut drives the slide table 5 to move horizontally along the axis of the lead screw 4, thereby adjusting the horizontal position of the mounting plate 9 and the detection components above it.

[0031] A first guide rail 10 is installed inside the mounting frame 2. The first guide rail 10 is a linear guide rail, preferably a THKSSR15 model, and its length is the same as that of the lead screw 4. It is fixed to the inner wall of the mounting frame 2 by bolts and is set parallel to the lead screw 4. A slide table 5 is slidably connected to the first guide rail 10. The bottom of the slide table 5 is provided with a slider that matches the first guide rail 10. The slider is fixedly connected to the slide table 5. The slider contains ball bearings, which can reduce the friction between the slide table 5 and the first guide rail 10, making the movement of the slide table 5 smoother. It also plays a guiding role, preventing the slide table 5 from deviating or tilting during movement and ensuring the straightness of the movement of the slide table 5. It should be noted that in this embodiment, the fit clearance between the slide table 5 and the first guide rail 10 is controlled at 0.002-0.003mm, which ensures the smooth movement of the slide table 5 and avoids positioning deviation caused by excessive clearance.

[0032] To enable the mounting plate 9 and the detection components below it to move up and down, and to adapt to the detection of steel structure components of different heights, this invention provides a lifting mechanism consisting of a vertical plate 6, a horizontal plate 7, an electric push rod 8, and a drive rod 11. This mechanism has a simple structure, is easy to operate, and can achieve smooth lifting and lowering of the mounting plate 9, with the lifting height being precisely adjustable.

[0033] A vertical plate 6 is fixed to the upper end of the slide table 5. The vertical plate 6 is made of steel plate and is vertically arranged. Its bottom is fixed to the slide table 5 by bolts. The connection surface is ground to ensure the flatness and reliability of the connection. The height of the vertical plate 6 is preferably 0.8-1.0m to provide sufficient installation space for the horizontal plate 7 and the electric push rod 8, while adapting to detection requirements of different heights. A horizontal plate 7 is fixed to the upper end of the vertical plate 6. The horizontal plate 7 is made of rectangular steel plate and is horizontally arranged. One end of the horizontal plate 7 is welded to the top of the vertical plate 6. The welding is full welding to ensure the connection strength and prevent deformation or loosening during the operation of the electric push rod 8.

[0034] An electric actuator 8 is installed on the horizontal plate 7. The electric actuator 8 is an electro-hydraulic actuator, preferably model DYTZ1000-500, with a rated thrust of 1000N and a stroke of 500mm. It can realize the up-and-down adjustment of the mounting plate 9, and the lifting speed can be adjusted within a range of 5-10mm / s to meet the needs of different testing scenarios. The electric actuator 8 is fixed to the middle of the horizontal plate 7 with bolts. Its output end is set vertically downward and fixedly connected to the upper end of the drive rod 11. The drive rod 11 is made of round steel tube, and its lower end is fixedly connected to the upper middle part of the mounting plate 9 by welding to ensure reliable connection. It can transmit the thrust of the electric actuator 8 and drive the mounting plate 9 to move up and down.

[0035] To further improve the stability and straightness of the mounting plate 9 during the lifting process and to prevent the mounting plate 9 from shifting during the lifting process and affecting the detection accuracy, the present invention also provides a guide mechanism. The guide mechanism includes a sliding sleeve 16 fixed on the mounting plate 9 and a second guide rail 15 fixed at the bottom of the horizontal plate 7. The structure is simple and the guiding effect is good.

[0036] The sliding sleeve 16 is made of copper and has a smooth through hole inside. The size of the through hole is adapted to the size of the second guide rail 15. The sliding sleeve 16 is fixed to the upper end of the mounting plate 9 by bolts and is symmetrically arranged on both sides of the drive rod 11, parallel to the drive rod 11. The second guide rail 15 is a linear guide rail, preferably of model THKSSR12. Its length is adapted to the stroke of the electric push rod 8. It is fixed to the bottom of the horizontal plate 7 by bolts and is arranged corresponding to the sliding sleeve 16. The axis of the second guide rail 15 coincides with the axis of the sliding sleeve 16.

[0037] The second guide rail 15 is located inside the sliding sleeve 16 and slides with it. The inner wall of the sliding sleeve 16 and the surface of the second guide rail 15 are coated with lubricating oil, which can reduce the friction between the two, making the lifting and lowering of the mounting plate 9 smoother. At the same time, it plays a guiding role, limiting the horizontal displacement of the mounting plate 9, and preventing the mounting plate 9 from shifting left and right or swaying back and forth during the lifting and lowering process. This ensures that the mounting plate 9 is always in a vertical lifting and lowering state, thereby ensuring the positional accuracy of the detection components such as the vertical rod 22 and the laser rangefinder 17, and improving the accuracy of the detection results.

[0038] It also includes components such as a vertical rod 22, a sleeve 20, a connecting block 23, a piston cylinder 24, a moving piston 28, a horizontal rod 25, a laser rangefinder 17, a lifting piston 30, a connecting rod 26, and a clamping rod 13. These components work together to enable the horizontal movement and rotation of the laser rangefinder 17, completing multi-mode detection of the component's torsion degree, as detailed below: The vertical rod 22 is made of a circular steel tube, and its upper end is rotatably connected to the bottom of the mounting plate 9 via a bearing. The bearing is a thrust ball bearing, preferably model 51108, which can withstand the axial pressure of the vertical rod 22 while ensuring the smoothness of the vertical rod 22 during rotation. The length of the vertical rod 22 is preferably 0.5-0.8m, and its interior has a circular groove 31, which is a blind hole, opened on the lower end face of the vertical rod 22. The inner diameter of the circular groove 31 is preferably 20-30mm, and the depth is preferably 100-150mm, for installing the lifting piston 30.

[0039] The lifting piston 30 is a rubber piston whose outer diameter matches the inner diameter of the circular groove 31. It is slidably connected within the circular groove 31, and a sealed fit is used between the lifting piston 30 and the inner wall of the circular groove 31 to ensure airtightness within the circular groove 31 and prevent air leakage that could affect the piston's movement. A connecting rod 26 is fixed to the bottom of the lifting piston 30. The connecting rod 26 is a circular steel rod, with its upper end fixedly connected to the bottom of the lifting piston 30 and its lower end passing through the bottom of the vertical rod 22 and extending to the outside, where it is rotatably connected to the clamping rod 13.

[0040] The upper end of the clamping rod 13 is connected to the connecting rod 26 via a bearing. The bearing is a deep groove ball bearing, preferably model 6204, which ensures that the clamping rod 13 can rotate freely around the connecting rod 26, preventing jamming when the clamping rod 13 contacts the surface of the steel structure component, and ensuring that the clamping rod 13 can fit tightly against the component surface. The lower end of the clamping rod 13 is tapered, and the tapered tip is made of hard alloy material, which has high hardness and strong wear resistance. This reduces the contact area between the clamping rod 13 and the component surface, increases the contact pressure, and allows the clamping rod 13 to be firmly pressed against the component surface, while avoiding scratches on the component surface.

[0041] A sleeve 20 is fixed to the outside of the vertical rod 22. The sleeve 20 is made of circular steel pipe, and its inner diameter is adapted to the outer diameter of the vertical rod 22. It is fitted onto the vertical rod 22 and fixedly connected to it by welding. The welding joint adopts a full welding process to ensure the connection strength and prevent relative rotation between the sleeve 20 and the vertical rod 22. The sleeve 20 can increase the strength of the vertical rod 22 and prevent its deformation.

[0042] A connecting block 23 is fitted on the outside of the sleeve 20. The connecting block 23 is a rectangular iron block with a through hole inside that is compatible with the sleeve 20. It is fitted onto the sleeve 20 and fixedly connected to it by bolts, which facilitates the disassembly, assembly, and position adjustment of the connecting block 23.

[0043] A piston cylinder 24 is fixed on the connecting block 23. The piston cylinder 24 is made of a circular steel tube and is horizontally positioned. One end of the piston cylinder 24 is welded and fixed to the connecting block 23. It is connected to the circular groove 31 through a connecting pipe (not shown in the figure). A sealing element is provided at the connection point to ensure airtightness. A movable piston 28 is slidably connected inside the piston cylinder 24. The movable piston 28 is a rubber piston, and its outer diameter is adapted to the inner diameter of the piston cylinder 24. It is sealed to the inner wall of the piston cylinder 24, allowing it to slide freely inside the piston cylinder 24 while ensuring airtightness within the piston cylinder 24.

[0044] A horizontal rod 25 is fixed to the moving piston 28. The horizontal rod 25 is a rectangular rod made of high-strength aluminum alloy, which is lightweight and high-strength, reducing the overall weight of the equipment while ensuring sufficient rigidity to prevent deformation during movement. One end of the horizontal rod 25 is fixedly connected to the moving piston 28, and the other end passes through the end of the piston cylinder 24 and extends to the outside, where a laser rangefinder 17 is fixed. The laser rangefinder 17 is a high-precision laser rangefinder, preferably a KEYENCEIL-1000 model, with a measuring range of 0-1000mm and a measuring accuracy of ±0.01mm. It can accurately measure the distance between the rangefinder and the surface of the steel structure component. The measurement data can be transmitted to external data processing equipment (such as a computer or PLC controller) via a data cable for subsequent calculation and analysis.

[0045] To ensure the straightness of the horizontal rod 25 during movement and prevent it from shifting or wobbling, a guide ring 27 is fixed inside the piston cylinder 24. The guide ring 27 is made of copper and has a rectangular through hole inside that matches the horizontal rod 25. The horizontal rod 25 passes through the guide ring 27 and slides with it. The guide ring 27 is fixed to the end of the piston cylinder 24 by bolts, which can guide and limit the horizontal rod 25, restricting its rotation and shift, and ensuring that the horizontal rod 25 always moves horizontally along the axis of the piston cylinder 24, thereby ensuring the detection position accuracy of the laser rangefinder 17.

[0046] In addition, a spring 29 is fixed on the movable piston 28. The spring 29 is a compression spring, preferably of model GB / T2089-2009. One end of the spring 29 is welded to the side of the movable piston 28, and the other end is welded to the inner wall of the piston cylinder 24. When the spring 29 is in its natural state, the movable piston 28 is located at the end of the piston cylinder 24 closest to the connecting block 23. The function of the spring 29 is to provide a restoring force. When the lifting piston 30 moves upward, the air pressure in the circular groove 31 increases and is delivered to the piston cylinder 24. The increased air pressure in the piston cylinder 24 can push the movable piston 28 to move away from the connecting block 23, thereby moving the horizontal rod 25 and the laser rangefinder 17. When the lifting piston 30 returns to its original position, the laser rangefinder 17 can be reset under the action of the spring 29.

[0047] To achieve the rotation of the vertical rod 22, which in turn drives the laser rangefinder 17 to rotate, thereby enabling omnidirectional torsion detection of the steel structure components, the present invention provides a driving mechanism, which includes a second motor 14, a power shaft 18, a first gear 19, and a second gear 21. The mechanism is compact, has high transmission efficiency, and is highly accurate in positioning.

[0048] The second motor 14 is mounted on the upper end of the mounting plate 9 and fixed to the edge of the mounting plate 9 with bolts to avoid affecting the installation and operation of other components. The second motor 14 is a servo motor, preferably model MF110D-1515, with a rated power of 1.0kW and a rated speed of 1500r / min. It has the advantages of adjustable speed and high positioning accuracy, and can accurately control the rotation angle and rotation speed of the vertical rod 22 to meet the needs of different detection scenarios.

[0049] A power shaft 18 is fixed to the output end of the second motor 14. The power shaft 18 is a round steel shaft, one end of which is fixedly connected to the output end of the second motor 14 via a coupling, and the other end passes through the mounting plate 9 and extends to the bottom of the mounting plate 9. The power shaft 18 and the mounting plate 9 are rotatably connected by bearings to ensure smooth rotation of the power shaft 18. A first gear 19 is fixedly connected to the power shaft 18. The first gear 19 is a spur gear and is fixed to the power shaft 18 via a key connection, ensuring reliable connection and transmitting the rotational motion of the power shaft 18.

[0050] A second gear 21 is fixed on the sleeve 20. The second gear 21 is a spur gear that meshes with the first gear 19 and is fixed to the sleeve 20 by a key connection, ensuring a reliable connection. The transmission ratio between the first gear 19 and the second gear 21 is 1:2, which enables speed reduction transmission, making the rotation speed of the vertical rod 22 more stable, while increasing the torque to ensure that the vertical rod 22 can drive the laser rangefinder 17 to rotate smoothly, avoiding inaccurate detection data due to excessive rotation speed. When the second motor 14 starts, the power shaft 18 drives the first gear 19 to rotate, the first gear 19 drives the second gear 21 to rotate, which in turn drives the sleeve 20 and the vertical rod 22 to rotate, ultimately driving the laser rangefinder 17 to rotate around the axis of the vertical rod 22, realizing all-round detection of the steel structure components.

[0051] To protect the connection points of the first gear 19, the second gear 21, the sleeve 20, and the vertical rod 22 from dust and debris, and to prevent accidental contact with rotating parts by inspection personnel during operation, thus avoiding safety accidents, the present invention also includes a protective cover 12. The protective cover 12 is made of transparent plastic material (such as PC material), which has good transparency, allowing inspection personnel to easily observe the operating status of the internal components, while also possessing sufficient strength to provide effective protection.

[0052] The protective cover 12 is fixed to the bottom of the mounting plate 9 and has a cover-like structure. Its size is adapted to the size of the drive mechanism and the sleeve 20, and it can completely cover the connection parts of the first gear 19, the second gear 21, the sleeve 20, and the vertical rod 22. The protective cover 12 is fixed to the mounting plate 9 by bolts, which makes it easy to disassemble and assemble, and facilitates the maintenance and repair of internal components. The sleeve 20 passes through the protective cover 12 and is rotatably connected to it. A seal is provided at the penetration point, which not only ensures the normal rotation of the sleeve 20, but also prevents dust and debris from entering the interior of the protective cover 12, thus protecting the normal operation of the internal components.

[0053] This steel structure component torsion testing equipment detects the torsion of steel structure components through two testing methods: detection by moving the laser rangefinder 17 horizontally along the component and detection by rotating the laser rangefinder 17. These two methods can be used individually or in combination to ensure the accuracy and comprehensiveness of the test results. The specific working principle is as follows: Adjust the position of the equipment according to the size and placement of the steel structure component to be tested: start the first motor 3, the first motor 3 drives the lead screw 4 to rotate, the lead screw 4 drives the slide table 5 to move horizontally along the first guide rail 10, and move the mounting plate 9 and the testing components to directly above the component to be tested; Start the electric push rod 8, which drives the drive rod 11 and the mounting plate 9 to move up and down. Adjust the height of the vertical rod 22 and the clamping rod 13 so that the conical tip of the clamping rod 13 can press against the surface of the component to be tested, and the laser rangefinder 17 can be aligned with the test surface of the component to ensure that the measurement distance is within the measurement range of the laser rangefinder 17.

[0054] The first detection method is suitable for detecting the torsion of a horizontal section of a steel structure component. A laser rangefinder 17 is moved horizontally along the surface of the component to measure distance data at different locations. After calculation and processing, the torsion parameters of the component are obtained. The specific working process is as follows: When the conical tip of the clamping rod 13 presses against the surface of the steel structure component to be inspected, the lifting piston 30 is in the initial position in the circular groove 31, the spring 29 is in the natural state, the moving piston 28 is located at one end of the piston cylinder 24 near the connecting block 23, and the laser rangefinder 17 is in the initial detection position.

[0055] The inspector controls the electric push rod 8 to drive the drive rod 11 and mounting plate 9 to continue moving downwards. Since the clamping rod 13 is unable to move downwards due to its contact with the steel structure component, the clamping rod 13 drives the connecting rod 26 and the lifting piston 30 to move upwards within the circular groove 31. As the lifting piston 30 moves upwards, it compresses the air within the circular groove 31, increasing the air pressure. Because the circular groove 31 is connected to the piston cylinder 24, high-pressure air enters the piston cylinder 24, generating a horizontal thrust on the moving piston 28, pushing it to move axially away from the connecting block 23 along the piston cylinder 24.

[0056] When the moving piston 28 moves, it drives the horizontal rod 25 and the laser rangefinder 17 to move horizontally together. Under the guidance of the guide ring 27, the horizontal rod 25 moves linearly along the axis of the piston cylinder 24, ensuring that the laser rangefinder 17 always moves in the horizontal direction and the detection direction is always aligned with the surface of the steel structure component.

[0057] During horizontal movement, the laser rangefinder 17 measures the distance between itself and the surface of the steel structure component in real time, and transmits the measurement data to an external data processing device via a data cable. The data processing device records and analyzes the measurement data. If the steel structure component is not twisted, the distance data measured by the laser rangefinder 17 during its movement should remain consistent; if the component is twisted, the distance data at different locations will deviate, and the magnitude of the deviation is proportional to the degree of twisting of the component.

[0058] When the laser rangefinder 17 moves to the maximum stroke position of the piston cylinder 24, a horizontal straight-line detection is completed. At this time, the electric push rod 8 drives the drive rod 11 and the mounting plate 9 to move upward, the clamping rod 13 is no longer squeezed, and under the action of the spring 29 itself, the lifting piston 30 is reset, pushing the moving piston 28 to move towards the connecting block 23, driving the horizontal rod 25 and the laser rangefinder 17 to reset, ready for the next detection.

[0059] The horizontal movement distance of the laser rangefinder 17 can be controlled by adjusting the moving distance of the lifting piston 30, adapting to the inspection needs of steel structure components of different widths; at the same time, the detection position can be changed by adjusting the first motor 3 and the electric push rod 8, so as to detect different horizontal sections of the component and fully understand the twisting of the component.

[0060] The second detection method, laser rangefinder 17 rotation detection, is as follows: This detection method is suitable for detecting the overall torsion of steel structure components. A laser rangefinder 17 rotates around the axis of the vertical rod 22 to measure distances to the component's surface from all directions. The overall torsion parameters of the component are then calculated and processed. The specific working process is as follows: The tapered tip of the clamping rod 13 is pressed against the surface of the steel structure component to be inspected. The laser rangefinder 17 is aligned with the initial inspection position of the component. At this time, the lifting piston 30 remains stationary, the air pressure in the circular groove 31 and the piston cylinder 24 remains stable, and the horizontal position of the laser rangefinder 17 remains unchanged.

[0061] The inspector starts the second motor 14 through an external control device. The second motor 14 drives the power shaft 18 to rotate, and the power shaft 18 drives the first gear 19 to rotate. The first gear 19 meshes with the second gear 21, driving the second gear 21 and the sleeve 20 to rotate. The sleeve 20 drives the vertical rod 22 to rotate together.

[0062] When the vertical rod 22 rotates, it drives the connecting block 23, piston cylinder 24, horizontal rod 25 and laser rangefinder 17 to rotate together around the axis of the vertical rod 22. During the rotation, the laser rangefinder 17 is always aligned with the surface of the steel structure component, measures the distance between itself and the surface of the component in real time, and transmits the measurement data to the external data processing equipment.

[0063] The data processing equipment records and analyzes the distance data measured during the rotation. If the steel structure component is not twisted, the distance data measured during the rotation of the laser rangefinder 17 should show a periodic pattern, and the maximum and minimum values ​​should remain consistent. If the component is twisted, the periodic pattern of the distance data will be broken, and the distance data at different rotation angles will show significant deviations. The magnitude of the deviation reflects the degree of twisting of the component.

[0064] Similar to the first detection method, the distance between the laser rangefinder 17 and the axis of the vertical rod 22 can be changed by controlling the electric push rod 8. This can be adapted to the torsion detection of steel structure components of different sizes, and the detection range of steel structure components can be flexibly controlled. Alternatively, the torsion of steel structure components can be measured by controlling the rotation angle of the laser rangefinder 17 according to the width of the steel structure component. This method has wide applicability.

[0065] After the test is completed, turn off the second motor 14, and the laser rangefinder 17 will stop rotating and return to the initial test position. If multiple tests are required, the above steps can be repeated to ensure the reliability of the test results.

[0066] This invention calculates the torsion of steel structure components by combining distance data measured by a laser rangefinder 17 with geometric relationships. The specific calculation method is as follows: For horizontal linear movement detection: Let the moving distance of the laser rangefinder 17 be L, and the distance data measured during the movement be d1, d2, d3, ..., dn (n is the number of measurement points). Calculate the average value of all measurement data d_avg=(d1+d2+...+dn) / n; calculate the deviation of each measurement data from the average value Δdi=|di-d_avg| (i=1,2,...,n), and take the maximum deviation Δd_max; the torsion of the horizontal section of the component is θ1=arctan(Δd_max / L), in radians (rad), which can be converted to angles.

[0067] For rotation detection: Let the rotation radius of the laser rangefinder 17 be R (i.e., the distance from the laser rangefinder 17 to the axis of the vertical rod 22). The distance data measured during one rotation are d1, d2, ..., dm (m is the number of measurement points). Calculate the distance ri = R - di (i = 1, 2, ..., m) from the component surface point corresponding to each measurement data to the axis of the vertical rod 22. Calculate the average value of all ri, r_avg = (r1 + r2 + ... + rm) / m. Calculate the deviation Δri = |ri - r_avg| between each ri and the average value, and take the maximum deviation Δr_max. The overall twist of the component is θ2 = Δr_max / R, in radians (rad), which can be converted to angles.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting the torsion of steel structure components, comprising a support frame (1), characterized in that, The support frame (1) is provided with a movable mounting plate (9) above it. The bottom of the mounting plate (9) is provided with a rotatable vertical rod (22). The bottom of the vertical rod (22) is provided with a circular groove (31). A lifting piston (30) is slidably connected in the circular groove (31). A connecting rod (26) is fixed at the bottom of the lifting piston (30). A clamping rod (13) is rotatably connected at the bottom of the connecting rod (26). A connecting block (23) is provided on the outside of the vertical rod (22). A piston cylinder (24) communicating with the circular groove (31) is fixed on the connecting block (23). A movable piston (28) is slidably connected in the piston cylinder (24). A horizontal rod (25) is fixed on the movable piston (28). A laser rangefinder (17) is fixed at the end of the horizontal rod (25). When the vertical rod (22) rotates, it can drive the laser rangefinder (17) to rotate. The laser rangefinder (17) measures the distance between itself and the component. The twist of the component can be calculated. The sleeve (20) is fixed to the outside of the vertical rod (22), the connecting block (23) is sleeved on the sleeve (20) and fixedly connected to it, and the mounting plate (9) is provided with a driving mechanism for driving the sleeve (20) to rotate; A spring (29) is fixed on the movable piston (28), and the other end of the spring (29) is fixedly connected to the inner wall of the piston cylinder (24); The detection radius is changed by adjusting the horizontal extension position of the laser rangefinder to adapt to steel structure components of different sizes; the laser rangefinder is driven to rotate around the component to achieve omnidirectional scanning in the circumferential direction; and continuous radial distance data of the component surface is captured.

2. The steel structure component torsion testing device according to claim 1, characterized in that, A mounting frame (2) is fixed on the support frame (1). A first motor (3) is mounted on the mounting frame (2). A lead screw (4) is fixed at the output end of the first motor (3). The lead screw (4) is rotatably connected to the inner wall of the mounting frame (2). A first guide rail (10) is installed inside the mounting frame (2). A slide table (5) is slidably connected on the first guide rail (10). The lead screw (4) passes through the slide table (5) and is threadedly connected to it.

3. The steel structure component torsion testing device according to claim 2, characterized in that, A vertical plate (6) is fixed to the upper end of the slide (5), and a horizontal plate (7) is fixed to the upper end of the vertical plate (6). An electric push rod (8) is installed on the horizontal plate (7), and a drive rod (11) is fixed to the output end of the electric push rod (8). The drive rod (11) is fixedly connected to the upper end of the mounting plate (9).

4. The steel structure component torsion testing device according to claim 3, characterized in that, It also includes a guide mechanism, which includes a sliding sleeve (16) fixed on the mounting plate (9), and a second guide rail (15) fixed at the bottom of the cross plate (7). The second guide rail (15) is located inside the sliding sleeve (16) and slides with it.

5. The steel structure component torsion testing device according to claim 1, characterized in that, The drive mechanism includes a second motor (14) mounted on the upper end of the mounting plate (9). The output end of the second motor (14) is fixed with a power shaft (18). A first gear (19) is fixedly connected to the power shaft (18). A second gear (21) is fixed on the sleeve (20). The first gear (19) meshes with the second gear (21).

6. The steel structure component torsion testing device according to claim 1, characterized in that, It also includes a protective cover (12), which is fixed to the bottom of the mounting plate (9), and the sleeve (20) passes through the protective cover (12) and is rotatably connected to it.

7. The steel structure component torsion testing device according to claim 1, characterized in that, The horizontal rod (25) is a rectangular rod, and a guide ring (27) is fixed inside the piston cylinder (24). The horizontal rod (25) passes through the guide ring (27) and is slidably connected to it.

8. The steel structure component torsion testing device according to claim 1, characterized in that, The upper end of the clamping rod (13) is connected to the connecting rod (26) via a bearing, and the lower end of the clamping rod (13) is tapered.

Images