Steel structure multi-point detection device and detection method thereof

Abstract

The invention relates to the technical field of detection, in particular to a steel structure multi-point detection device and a detection method thereof. The device comprises a rack, a control box, a multi-point loading mechanism, a clamping mechanism, a conveying mechanism and a stress detection mechanism, the multi-point loading mechanism is installed at the top of the rack through a loading longitudinal adjusting module, the stress detection mechanism is arranged at the bottom of the rack through a distance adjusting mechanism, the stress detection mechanism comprises a plurality of installation lifting hydraulic cylinders installed on the distance adjusting mechanism, and angle adjusting gears are installed on cylinder bodies of the installation lifting hydraulic cylinders; the angle adjusting gears are all connected with an angle adjusting driving mechanism on the rack, a mounting plate is fixed to the telescopic end of the mounting lifting hydraulic cylinder, at least one mounting groove is formed in the mounting plate, and a surface stress meter is arranged in the mounting groove. Meanwhile, the invention discloses a detection method based on the device, by adopting the steel structure multi-point detection device and the detection method thereof, multi-point loading can be achieved, meanwhile, automatic arrangement of different surface stress meter layouts is achieved, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a multi-point testing device and method for steel structures. Background Technology

[0002] Steel structures are structures made of steel materials and are one of the main types of building structures. The structure mainly consists of components such as beams, columns, and trusses made of shaped steel and steel plates, and is primarily composed of relatively long components. In steel structure engineering, the quality of the steel structure directly affects the safety and stability of the entire building or equipment; therefore, accurate and comprehensive testing of steel structures is crucial. Existing technologies for surface stress gauges involve cumbersome installation and are time-consuming, reducing testing efficiency. Furthermore, they generally use fixed-point stress application for testing, failing to provide comprehensive multi-point stress testing. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-point detection device and method for steel structures, thereby solving the aforementioned technical problems.

[0004] To achieve the above objectives, the present invention provides a multi-point testing device for steel structures, including a frame and a control box. The frame is arranged from top to bottom as a multi-point loading mechanism, a clamping mechanism, a conveying mechanism, and a stress testing mechanism. The multi-point loading mechanism is installed on the top of the frame via a loading longitudinal adjustment module. The clamping mechanism is used to clamp the steel structure to be tested. The conveying mechanism is used to convey the steel structure to be tested. The stress testing mechanism is set at the bottom of the frame via a spacing adjustment mechanism. The stress testing mechanism includes several installation lifting hydraulic cylinders installed on the spacing adjustment mechanism. An angle adjustment gear is installed on the cylinder body of the installation lifting hydraulic cylinder. The several angle adjustment gears are all connected to the angle adjustment drive mechanism on the frame. An installation plate is fixed to the telescopic end of the installation lifting hydraulic cylinder. At least one installation groove is provided on the installation plate, and a surface stress gauge is installed in the installation groove. The multi-point loading mechanism, clamping mechanism, conveying mechanism, and stress detection mechanism are all electrically connected to the control box.

[0005] Preferably, the multi-point loading mechanism includes a loading hydraulic cylinder, which is mounted on the loading moving block of the loading longitudinal adjustment module. L-shaped limit plates are provided on both sides of the loading moving block to prevent the loading moving block from rotating. Both the loading hydraulic cylinder and the loading longitudinal adjustment module are electrically connected to the control box.

[0006] Preferably, the clamping mechanism includes a fixed clamping component disposed at the feed end of the frame and a movable clamping component mounted on the clamping longitudinal adjustment module, wherein the clamping longitudinal adjustment module is mounted on the frame; Both the fixed clamping assembly and the movable clamping assembly include two clamping structures arranged in a mirror image. Each clamping structure includes a limiting rail, in which a first movable clamping hydraulic cylinder, a fixed clamping hydraulic cylinder, and a second movable clamping hydraulic cylinder are sequentially arranged. The first and second movable clamping hydraulic cylinders are respectively mounted within the limiting rail via a first and a second lateral adjustment hydraulic cylinder, and are symmetrically arranged. The limiting rail of the upper clamping structure is mounted on the frame via an extension rod. The two limiting rails of the movable clamping assembly are connected by a connecting plate, which is connected to the clamping longitudinal adjustment module. A photoelectric sensor is installed in the middle of the limiting rail on the movable clamping assembly to detect the position of the first and last ends of the steel structure being measured. The photoelectric sensor, the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, the second moving clamping hydraulic cylinder, the first lateral adjustment hydraulic cylinder, the second lateral adjustment hydraulic cylinder, and the clamping longitudinal adjustment module are all electrically connected to the controller.

[0007] Preferably, the conveying mechanism includes several rotating shafts arranged in parallel on the frame. Two transmission gears are arranged in parallel at one end of each rotating shaft. Adjacent rotating shafts are connected by a chain. One of the transmission gears on the rotating shaft at one end of the frame is connected to a drive motor through a meshing gear.

[0008] Preferably, a fixed plate is provided in the middle of the rotating shaft, and two support plates are slidably provided on the rotating shaft on both sides of the fixed plate. A drive roller is provided on the top of the support plate. Adjacent drive gears in the longitudinal direction are connected by a gear chain structure. A conveying motor is connected to the drive roller of one of the support plates. A rotating plate is connected to the fixed plate through a spacing adjustment motor. A hinge plate is connected to both ends of the rotating plate. The two hinge plates are hinged to the two support plates respectively. The spacing adjustment motor drives the rotating plate to rotate so that the two support plates move closer or further apart. The conveyor motor, the spacing adjustment motor, and the engagement drive motor are all electrically connected to the controller.

[0009] Preferably, the spacing adjustment mechanism includes a pull-out plate and a spacing adjustment frame that are slidably mounted on the frame. A limit groove is provided in the middle of the pull-out plate. The spacing adjustment frame includes several X-shaped hinge components connected in sequence. The central hinge shaft of the X-shaped hinge component at the first end is hinged to one end of the pull-out plate. A spacing adjustment hydraulic cylinder is provided on the X-shaped hinge component at the first end. The central hinge shaft of the X-shaped hinge components at the non-first end is rotatably mounted with a lifting hydraulic cylinder, and the central hinge shaft is located in the limit groove. The contraction and extension of the spacing adjustment hydraulic cylinder drives the central hinge shaft of the X-shaped hinge components at the non-first end to move along the limit groove to adjust the spacing of each lifting hydraulic cylinder. The spacing adjustment hydraulic cylinder is electrically connected to the controller.

[0010] Preferably, the angle adjustment drive mechanism includes a drive rack slidably mounted on the frame, the drive rack meshing with an angle adjustment gear, and one end of the drive rack being connected to an angle adjustment hydraulic cylinder mounted on the frame; The angle-adjusting hydraulic cylinder is electrically connected to the controller.

[0011] Preferably, several mounting slots are linearly distributed, and an electromagnet is installed in each mounting slot; The electromagnet, surface stress gauge, and lifting hydraulic cylinder are all electrically connected to the controller.

[0012] Preferably, it also includes a feeding mechanism, which includes two mounting frames symmetrically arranged at the feed end of the frame. A feeding hydraulic cylinder is mounted on the mounting frame. A feeding plate is provided at the telescopic end of the feeding hydraulic cylinder. The feeding plate is embedded with a number of anti-wear balls. The material handling hydraulic cylinder is electrically connected to the controller.

[0013] The specific steps of the detection method based on the above-mentioned multi-point detection device for steel structures are as follows: Step S1: Input the dimensional data of the steel structure to be measured, the surface stress gauge arrangement requirements, and the loading data through the controller. The loading data includes the loading location and the loading force value. Step S2: Adjust the position of the moving clamping component according to the size data using the clamping longitudinal adjustment module; adjust the distance between the two support plates according to the size data using the distance adjustment motor; adjust the position of the first moving clamping hydraulic cylinder and the second moving clamping hydraulic cylinder according to the size data using the first lateral adjustment hydraulic cylinder and the second lateral adjustment hydraulic cylinder. Step S3: Start the engagement drive motor to drive several rotating shafts to rotate simultaneously, so that several support plates rotate synchronously, so that the support plates change from an inclined state to a vertical state, and the drive rollers on the support plates are higher than the height of the extension end of the first or second moving clamping hydraulic cylinder. Step S4: After the steel structure to be tested is pushed into the machine frame from the feed end, adjust the extension and retraction of the hydraulic cylinder according to the size data so that the material feeding plate fits the two sides of the steel structure to be tested and the bottom of the steel structure to be tested contacts the drive roller. Start the conveyor motor in the conveying mechanism. After the photoelectric sensor detects the first end of the steel structure to be tested and delays for a set time, the conveyor motor is turned off, stopping the conveying of the steel structure to be tested, so that the steel structure to be tested is conveyed to the detection position. Step S5: After the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, and the second moving clamping hydraulic cylinder extend and clamp the two ends of the steel structure to be tested, the engagement drive motor is started to rotate in the opposite direction, so that the support plate changes from a vertical state to an inclined state, and the drive roller is disengaged from the bottom of the steel structure to be tested, so that the steel structure to be tested is in a state of being clamped and fixed at both ends and suspended in the middle. Step S6: Start the angle adjustment hydraulic cylinder, which causes the drive rack to move and drive several angle adjustment gears to rotate synchronously, so that the mounting plate is parallel to the steel structure being measured. Start the lifting hydraulic cylinder, which causes the mounting plate to rise. After the mounting plate passes through the conveying mechanism, according to the surface stress gauge arrangement requirements, start the angle adjustment hydraulic cylinder to adjust the angle between the mounting plate and the longitudinal direction of the steel structure being measured. The mounting plate continues to rise, so that the surface stress gauge in the mounting groove is in contact with the bottom of the steel structure being measured. Then, the lifting hydraulic cylinder descends to the set distance and stops retracting. Step S7: Load the longitudinal adjustment module to adjust the longitudinal position of the loading hydraulic cylinder, and load different points of the steel structure under test in sequence, while collecting stress data through a surface stress gauge. Step S8: After collecting all the stress data after loading, start the lifting hydraulic cylinder to raise the mounting plate to the bottom of the steel structure under test and stop. Start the electromagnet to return the surface stress gauge to the mounting groove. Start the angle adjustment hydraulic cylinder to make the mounting plate parallel to the steel structure under test. Start the lifting hydraulic cylinder to lower the mounting plate to the initial position. Then, the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, and the second moving clamping hydraulic cylinder simultaneously retract and release both ends of the steel structure under test. Start the engagement drive motor to rotate, so that the support plate changes from an inclined state to a vertical state. The drive roller contacts the bottom of the steel structure under test. After starting the conveyor motor, the tested steel structure is output from the frame.

[0014] Therefore, the present invention employs the above-mentioned multi-point detection device and method for steel structures, which has the following beneficial effects: (1) The multi-point loading mechanism is installed on the top of the frame by loading longitudinal adjustment module. It can adjust the force application position according to the length of the specific steel structure and the specific force application position to realize multi-point stress detection.

[0015] (2) The stress detection mechanism includes several installation lifting hydraulic cylinders installed on the spacing adjustment mechanism. The cylinder body of the installation lifting hydraulic cylinder is equipped with angle adjustment gears. Several angle adjustment gears are connected to the angle adjustment drive mechanism on the frame. The telescopic end of the installation lifting hydraulic cylinder is fixed with an installation plate. At least one installation groove is provided on the installation plate. A surface stress gauge is provided in the installation groove to realize the detection of different positions and different layouts of the surface stress gauge and improve the detection efficiency.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a multi-point detection device for steel structures according to the present invention; Figure 2 This is a side view of a multi-point detection device for steel structures according to the present invention; Figure 3 This is a partial structural diagram of the multi-point loading mechanism of the present invention; Figure 4 This is a schematic diagram of the clamping structure of the present invention; Figure 5 This is a schematic diagram of the rotating shaft structure of the present invention; Figure 6 This is a schematic diagram of the spacing adjustment mechanism of the present invention; Figure 7 This is a schematic diagram of the lifting hydraulic cylinder structure of the present invention; Figure 8 This is a schematic diagram of the material handling mechanism of the present invention.

[0018] Figure Labels 1. Frame; 2. Multi-point loading mechanism; 21. Loading longitudinal adjustment module; 22. Loading hydraulic cylinder; 23. Loading moving block; 24. L-shaped limiting plate; 3. Clamping mechanism; 31. Limiting track; 32. First moving clamping hydraulic cylinder; 33. Fixed clamping hydraulic cylinder; 34. Second moving clamping hydraulic cylinder; 35. First lateral adjustment hydraulic cylinder; 36. Second lateral adjustment hydraulic cylinder; 37. Extension rod; 38. Connecting plate; 39. Clamping longitudinal adjustment module; 310. Photoelectric sensor; 4. Conveying mechanism; 41. Rotating shaft; 42. Transmission gear; 43. Engagement drive motor; 44. Fixing plate; 5. Support plate; 46. Drive roller; 47. Rotating plate; 48. Hinge plate; 49. Spacing adjustment motor; 5. Stress detection mechanism; 51. Mounting lifting hydraulic cylinder; 52. Angle adjustment gear; 53. Mounting plate; 54. Mounting groove; 55. Surface stress gauge; 56. Electromagnet; 6. Spacing adjustment mechanism; 61. Pull-out plate; 62. Spacing adjustment frame; 63. Limiting groove; 64. Spacing adjustment hydraulic cylinder; 7. Angle adjustment drive mechanism; 71. Drive rack; 72. Angle adjustment hydraulic cylinder; 8. Material handling mechanism; 81. Mounting frame; 82. Material handling hydraulic cylinder; 83. Material handling plate; 84. Anti-wear ball bearings. Detailed Implementation

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-2 As shown, a multi-point detection device for steel structures includes a frame 1 and a control box (using existing control equipment, with wiring and fixing according to the specific site conditions).

[0022] The frame 1 is equipped with a multi-point loading mechanism 2, a clamping mechanism 3, a conveying mechanism 4, and a stress detection mechanism 5 from top to bottom.

[0023] like Figure 3 As shown, the multi-point loading mechanism 2 is installed on the top of the frame 1 via the loading longitudinal adjustment module 21 (screw motor module). The multi-point loading mechanism 2 includes a loading hydraulic cylinder 22, which is installed on the loading moving block 23 of the loading longitudinal adjustment module 21. L-shaped limit plates 24 are provided on both sides of the loading moving block 23 to prevent the loading moving block 23 from rotating. Both the loading hydraulic cylinder 22 and the loading longitudinal adjustment module 21 are electrically connected to the control box. The longitudinal position of the loading hydraulic cylinder 22 is adjusted by the loading longitudinal adjustment module 21 to realize stress detection when loading at different points and with different forces.

[0024] The clamping mechanism 3 is used to clamp the steel structure to be measured. The clamping mechanism 3 includes a fixed clamping component set at the feed end of the frame 1 and a movable clamping component installed on the clamping longitudinal adjustment module 39. The clamping longitudinal adjustment module 39 is installed on the frame 1 and can realize the clamping of steel structures of different lengths.

[0025] Both the fixed clamping assembly and the movable clamping assembly include two clamping structures arranged in a mirror image configuration, such as... Figure 4As shown, the clamping structure includes a limiting track 31. A first movable clamping hydraulic cylinder 32, a fixed clamping hydraulic cylinder 33, and a second movable clamping hydraulic cylinder 34 are sequentially arranged in the limiting track 31. The first movable clamping hydraulic cylinder 32 and the second movable clamping hydraulic cylinder 34 are respectively installed within the limiting track 31 via a first lateral adjusting hydraulic cylinder 35 and a second lateral adjusting hydraulic cylinder 36, and the first lateral adjusting hydraulic cylinder 35 and the second lateral adjusting hydraulic cylinder 36 are symmetrically arranged. The limiting track 31 of the upper clamping structure in the fixed clamping assembly is installed on the frame 1 via an extension rod 37. The two movable clamping assemblies... Each limiting track 31 is connected to a connecting plate 38, which is connected to a clamping longitudinal adjustment module 39 (screw motor module). The longitudinal position is adjusted by clamping the longitudinal adjustment module 39. A photoelectric sensor 310 is installed in the middle of the limiting track 31 on the moving clamping assembly to detect the position of the first and last ends of the steel structure being measured. The photoelectric sensor 310, the first moving clamping hydraulic cylinder 32, the fixed clamping hydraulic cylinder 33, the second moving clamping hydraulic cylinder 34, the first lateral adjustment hydraulic cylinder 35, the second lateral adjustment hydraulic cylinder 36, and the clamping longitudinal adjustment module 39 are all electrically connected to the controller.

[0026] The conveying mechanism 4 is used to convey the steel structure under test. The conveying mechanism 4 includes several rotating shafts 41 arranged in parallel on the frame 1. Two parallel transmission gears 42 are provided at one end of each rotating shaft 41. Adjacent rotating shafts 41 are connected by a chain. One of the transmission gears 42 on the rotating shaft 41 at one end of the frame 1 is connected to a drive motor 43 through a meshing gear. The drive motor 43 is electrically connected to a controller. This enables one motor to drive the simultaneous rotation of multiple rotating shafts 41.

[0027] like Figure 5 As shown, a fixed plate 44 is provided in the middle of the rotating shaft 41. Two support plates 45 are slidably arranged on the rotating shaft 41 on both sides of the fixed plate 44. A drive roller 46 is provided on the top of the support plate 45. Adjacent drive gears in the longitudinal direction are connected by a gear chain structure. One of the drive rollers 46 of the support plate 45 is connected to a conveyor motor, which is electrically connected to the controller, so that one motor drives the rotation of multiple drive rollers 46. A rotating plate 47 is connected to the fixed plate 44 through a spacing adjustment motor 49. Hinged plates 48 are connected to both ends of the rotating plate 47. The two hinged plates 48 are respectively hinged to the two support plates 45. The spacing adjustment motor 49 is electrically connected to the controller. The spacing adjustment motor 49 drives the rotating plate 47 to rotate, so that the two support plates 45 move closer or further apart, realizing steel structural components of different widths.

[0028] The stress testing mechanism 5 is installed at the bottom of the frame 1 via the spacing adjustment mechanism 6, such as... Figure 6As shown, the spacing adjustment mechanism 6 includes a pull-out plate 61 and a spacing adjustment frame 62 slidably mounted on the frame 1. A limiting groove 63 is provided in the middle of the pull-out plate 61. The spacing adjustment frame 62 includes several X-shaped hinge components connected in sequence. The central hinge shaft of the X-shaped hinge component at the first end is hinged to one end of the pull-out plate 61, and a spacing adjustment hydraulic cylinder 64 is provided on the X-shaped hinge component at the first end. The central hinge shaft of the X-shaped hinge components at the non-first end is rotatably mounted with a lifting hydraulic cylinder 51, and the central hinge shaft is located in the limiting groove 63. The spacing adjustment hydraulic cylinder 64 retracts and extends, causing the central hinge shaft of the X-shaped hinge components at the non-first end to move along the limiting groove 63 to adjust the spacing of each lifting hydraulic cylinder 51. The spacing adjustment hydraulic cylinder 64 is electrically connected to the controller.

[0029] The stress detection mechanism 5 includes several lifting hydraulic cylinders 51 mounted on the spacing adjustment mechanism 6, such as... Figure 7 As shown, the cylinder body of the lifting hydraulic cylinder 51 is equipped with angle adjusting gears 52. Several angle adjusting gears 52 are connected to an angle adjusting drive mechanism 7 on the frame 1. The angle adjusting drive mechanism 7 includes a drive rack 71 slidably mounted on the frame 1. The drive rack 71 meshes with the angle adjusting gears 52. One end of the drive rack 71 is connected to the angle adjusting hydraulic cylinder 72 mounted on the frame 1. The angle adjusting hydraulic cylinder 72 is electrically connected to the controller. A mounting plate 53 is fixed to the telescopic end of the lifting hydraulic cylinder 51. The mounting plate 53 has three mounting slots 54, each containing a surface stress gauge 55 (a surface stress gauge 55 with a magnetic attractor). Several mounting slots 54 are linearly distributed, and an electromagnet 56 is installed within each slot. The electromagnet 56, the surface stress gauge 55, and the lifting hydraulic cylinder 51 are all electrically connected to the controller.

[0030] To ensure the steel structure under test is positioned in the center, a material handling mechanism 8 is installed, such as... Figure 8 As shown, the material handling mechanism 8 includes two mounting frames 81 symmetrically arranged at the feeding end of the frame 1. A material handling hydraulic cylinder 82 is mounted on the mounting frame 81. A material handling plate 83 is provided at the telescopic end of the material handling hydraulic cylinder 82. The material handling plate 83 is embedded with a number of anti-wear balls 84. The material handling hydraulic cylinder 82 is electrically connected to the controller.

[0031] The specific steps of the detection method based on the above-mentioned multi-point detection device for steel structures are as follows: Step S1: Input the dimensional data of the steel structure to be measured, the arrangement requirements of the surface stress gauge 55, and the loading data through the controller. The loading data includes the loading position and the loading force value.

[0032] Step S2: Adjust the position of the moving clamping component according to the size data by using the clamping longitudinal adjustment module 39; adjust the distance between the two support plates 45 according to the size data by using the distance adjustment motor 49; adjust the position of the first moving clamping hydraulic cylinder 32 and the second moving clamping hydraulic cylinder 34 according to the size data by using the first lateral adjustment hydraulic cylinder 35 and the second lateral adjustment hydraulic cylinder 36.

[0033] Step S3: Start the engagement drive motor 43 to drive several rotating shafts 41 to rotate simultaneously, so that several support plates 45 rotate synchronously, so that the support plates 45 change from an inclined state to a vertical state, and the drive rollers 46 on the support plates 45 are higher than the height of the extension end of the first moving clamping hydraulic cylinder 32 or the second moving clamping hydraulic cylinder 34.

[0034] Step S4: After the steel structure to be tested is pushed into the feed end of the frame 1, the extension and retraction of the material handling hydraulic cylinder 82 is adjusted according to the size data so that the material handling plate 83 fits against both sides of the steel structure to be tested, and the bottom of the steel structure to be tested contacts the drive roller 46. The conveying motor in the conveying mechanism 4 is started. After the photoelectric sensor 310 detects the first end of the steel structure to be tested and delays for a set time, the conveying motor is turned off, stopping the conveying of the steel structure to be tested, so that the steel structure to be tested is conveyed to the detection position.

[0035] Step S5: After the first moving clamping hydraulic cylinder 32, the fixed clamping hydraulic cylinder 33, and the second moving clamping hydraulic cylinder 34 extend and clamp the two ends of the steel structure under test, the engagement drive motor 43 is started to rotate in the opposite direction, so that the support plate 45 changes from a vertical state to an inclined state, and the drive roller 46 is disengaged from the bottom of the steel structure under test, so that the steel structure under test is in a state of being clamped and fixed at both ends and suspended in the middle.

[0036] Step S6: Start the angle adjustment hydraulic cylinder 72, causing the drive rack 71 to move and drive several angle adjustment gears 52 to rotate synchronously, so that the mounting plate 53 is in a state parallel to the steel structure being measured. Start the lifting hydraulic cylinder, so that the mounting plate 53 rises. After the mounting plate 53 passes through the conveying mechanism 4, according to the arrangement requirements of the surface stress gauge 55, start the angle adjustment hydraulic cylinder 72 to adjust the angle between the mounting plate 53 and the longitudinal direction of the steel structure being measured. The mounting plate 53 continues to rise, so that the surface stress gauge 55 in the mounting groove 54 is in contact with the bottom of the steel structure being measured. Then the lifting hydraulic cylinder descends to the set distance and stops retracting.

[0037] Step S7: The longitudinal adjustment module 21 is loaded to adjust the longitudinal position of the loading hydraulic cylinder 22, and the load is applied to different points of the steel structure under test in sequence. At the same time, stress data is collected by the surface stress meter 55.

[0038] Step S8: After collecting all the stress data after loading, start the lifting hydraulic cylinder so that the mounting plate 53 rises to the bottom of the steel structure under test and stops. Start the electromagnet 56 so that the surface stress gauge 55 returns to the mounting groove 54. Start the angle adjustment hydraulic cylinder 72 so that the mounting plate 53 is in a parallel state with the steel structure under test. Start the lifting hydraulic cylinder so that the mounting plate 53 falls to the initial position. Then, the first moving clamping hydraulic cylinder 32, the fixed clamping hydraulic cylinder 33, and the second moving clamping hydraulic cylinder 34 simultaneously retract and release the two ends of the steel structure under test. Start the engagement drive motor 43 to rotate so that the support plate 45 changes from an inclined state to a vertical state. Drive the roller 46 to contact the bottom of the steel structure under test. After starting the conveyor motor, output the steel structure under test after testing to the frame 1.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-point detection device for steel structures, comprising a frame and a control box, characterized in that: The frame is arranged from top to bottom as follows: a multi-point loading mechanism, a clamping mechanism, a conveying mechanism, and a stress detection mechanism. The multi-point loading mechanism is installed on the top of the frame via a loading longitudinal adjustment module. The clamping mechanism is used to clamp the steel structure under test. The conveying mechanism is used to convey the steel structure under test. The stress detection mechanism is set at the bottom of the frame via a spacing adjustment mechanism. The stress detection mechanism includes several installation lifting hydraulic cylinders installed on the spacing adjustment mechanism. The cylinder body of the installation lifting hydraulic cylinder is equipped with angle adjustment gears. Several angle adjustment gears are connected to the angle adjustment drive mechanism on the frame. The telescopic end of the installation lifting hydraulic cylinder is fixed with a mounting plate. The mounting plate is provided with at least one mounting groove, and a surface stress gauge is installed in the mounting groove. The multi-point loading mechanism, clamping mechanism, conveying mechanism, and stress detection mechanism are all electrically connected to the control box.

2. The multi-point detection device for steel structures according to claim 1, characterized in that: The multi-point loading mechanism includes a loading hydraulic cylinder, which is mounted on the loading moving block of the loading longitudinal adjustment module. L-shaped limit plates are provided on both sides of the loading moving block to prevent the loading moving block from rotating. Both the loading hydraulic cylinder and the loading longitudinal adjustment module are electrically connected to the control box.

3. The multi-point detection device for steel structures according to claim 2, characterized in that: The clamping mechanism includes a fixed clamping component disposed at the feed end of the frame and a movable clamping component mounted on the clamping longitudinal adjustment module, the clamping longitudinal adjustment module being mounted on the frame; Both the fixed clamping assembly and the movable clamping assembly include two clamping structures arranged in a mirror image. Each clamping structure includes a limiting rail, in which a first movable clamping hydraulic cylinder, a fixed clamping hydraulic cylinder, and a second movable clamping hydraulic cylinder are sequentially arranged. The first and second movable clamping hydraulic cylinders are respectively mounted within the limiting rail via a first and a second lateral adjustment hydraulic cylinder, and are symmetrically arranged. The limiting rail of the upper clamping structure is mounted on the frame via an extension rod. The two limiting rails of the movable clamping assembly are connected by a connecting plate, which is connected to the clamping longitudinal adjustment module. A photoelectric sensor is installed in the middle of the limiting rail on the movable clamping assembly to detect the position of the first and last ends of the steel structure being measured. The photoelectric sensor, the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, the second moving clamping hydraulic cylinder, the first lateral adjustment hydraulic cylinder, the second lateral adjustment hydraulic cylinder, and the clamping longitudinal adjustment module are all electrically connected to the controller.

4. The multi-point detection device for steel structures according to claim 3, characterized in that: The conveying mechanism includes several rotating shafts arranged in parallel on the frame. Two transmission gears are arranged in parallel at one end of the rotating shaft. Adjacent rotating shafts are connected by a chain. One of the transmission gears on the rotating shaft at one end of the frame is connected to the drive motor through a meshing gear.

5. A multi-point detection device for steel structures according to claim 4, characterized in that: A fixed plate is provided in the middle of the rotating shaft. Two support plates are slidably arranged on the rotating shaft on both sides of the fixed plate. A drive roller is provided on the top of the support plate. Adjacent drive gears in the longitudinal direction are connected by a gear chain structure. A conveyor motor is connected to the drive roller of one of the support plates. A rotating plate is connected to the fixed plate through a spacing adjustment motor. A hinge plate is connected to both ends of the rotating plate. The two hinge plates are hinged to the two support plates respectively. The spacing adjustment motor drives the rotating plate to rotate, so that the two support plates move closer or further apart. The conveyor motor, the spacing adjustment motor, and the engagement drive motor are all electrically connected to the controller.

6. The multi-point detection device for steel structures according to claim 5, characterized in that: The spacing adjustment mechanism includes a pull-out plate and a spacing adjustment frame that are slidably mounted on the frame. A limit groove is provided in the middle of the pull-out plate. The spacing adjustment frame includes several X-shaped hinge components connected in sequence. The central hinge shaft of the X-shaped hinge component at the first end is hinged to one end of the pull-out plate. A spacing adjustment hydraulic cylinder is provided on the X-shaped hinge component at the first end. The central hinge shaft of the X-shaped hinge components at the non-first end is rotatably mounted with a lifting hydraulic cylinder, and the central hinge shaft is located in the limit groove. The contraction and extension of the spacing adjustment hydraulic cylinder drives the central hinge shaft of the X-shaped hinge components at the non-first end to move along the limit groove to adjust the spacing of each lifting hydraulic cylinder. The spacing adjustment hydraulic cylinder is electrically connected to the controller.

7. A multi-point detection device for steel structures according to claim 6, characterized in that: The angle adjustment drive mechanism includes a drive rack that is slidably mounted on the frame, the drive rack meshing with an angle adjustment gear, and one end of the drive rack being connected to an angle adjustment hydraulic cylinder mounted on the frame. The angle-adjusting hydraulic cylinder is electrically connected to the controller.

8. A multi-point detection device for steel structures according to claim 7, characterized in that: Several mounting slots are linearly distributed, and electromagnets are installed in the mounting slots; The electromagnet, surface stress gauge, and lifting hydraulic cylinder are all electrically connected to the controller.

9. A multi-point detection device for steel structures according to claim 8, characterized in that: It also includes a material feeding mechanism, which includes two mounting frames symmetrically arranged at the feed end of the frame. A material feeding hydraulic cylinder is mounted on the mounting frame. A material feeding plate is provided at the telescopic end of the material feeding hydraulic cylinder. The material feeding plate is embedded with several anti-wear balls. The material handling hydraulic cylinder is electrically connected to the controller.

10. A detection method based on the multi-point detection device for steel structures according to claim 9, characterized in that, The specific steps are as follows: Step S1: Input the dimensional data of the steel structure to be measured, the surface stress gauge arrangement requirements, and the loading data through the controller. The loading data includes the loading location and the loading force value. Step S2: Adjust the position of the moving clamping component according to the size data using the clamping longitudinal adjustment module; adjust the distance between the two support plates according to the size data using the distance adjustment motor; adjust the position of the first moving clamping hydraulic cylinder and the second moving clamping hydraulic cylinder according to the size data using the first lateral adjustment hydraulic cylinder and the second lateral adjustment hydraulic cylinder. Step S3: Start the engagement drive motor to drive several rotating shafts to rotate simultaneously, so that several support plates rotate synchronously, so that the support plates change from an inclined state to a vertical state, and the drive rollers on the support plates are higher than the height of the extension end of the first or second moving clamping hydraulic cylinder. Step S4: After the steel structure to be tested is pushed into the machine frame from the feed end, adjust the extension and retraction of the hydraulic cylinder according to the size data so that the material feeding plate fits the two sides of the steel structure to be tested and the bottom of the steel structure to be tested contacts the drive roller. Start the conveyor motor in the conveying mechanism. After the photoelectric sensor detects the first end of the steel structure to be tested and delays for a set time, the conveyor motor is turned off, stopping the conveying of the steel structure to be tested, so that the steel structure to be tested is conveyed to the detection position. Step S5: After the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, and the second moving clamping hydraulic cylinder extend and clamp the two ends of the steel structure to be tested, the engagement drive motor is started to rotate in the opposite direction, so that the support plate changes from a vertical state to an inclined state, and the drive roller is disengaged from the bottom of the steel structure to be tested, so that the steel structure to be tested is in a state of being clamped and fixed at both ends and suspended in the middle. Step S6: Start the angle adjustment hydraulic cylinder, which causes the drive rack to move and drive several angle adjustment gears to rotate synchronously, so that the mounting plate is parallel to the steel structure being measured. Start the lifting hydraulic cylinder, which causes the mounting plate to rise. After the mounting plate passes through the conveying mechanism, according to the surface stress gauge arrangement requirements, start the angle adjustment hydraulic cylinder to adjust the angle between the mounting plate and the longitudinal direction of the steel structure being measured. The mounting plate continues to rise, so that the surface stress gauge in the mounting groove is in contact with the bottom of the steel structure being measured. Then, the lifting hydraulic cylinder descends to the set distance and stops retracting. Step S7: Load the longitudinal adjustment module to adjust the longitudinal position of the loading hydraulic cylinder, and load different points of the steel structure under test in sequence, while collecting stress data through a surface stress gauge. Step S8: After collecting all the stress data after loading, start the lifting hydraulic cylinder to raise the mounting plate to the bottom of the steel structure under test and stop. Start the electromagnet to return the surface stress gauge to the mounting groove. Start the angle adjustment hydraulic cylinder to make the mounting plate parallel to the steel structure under test. Start the lifting hydraulic cylinder to lower the mounting plate to the initial position. Then, the first moving clamping hydraulic cylinder, the fixed clamping hydraulic cylinder, and the second moving clamping hydraulic cylinder simultaneously retract and release both ends of the steel structure under test. Start the engagement drive motor to rotate, so that the support plate changes from an inclined state to a vertical state. The drive roller contacts the bottom of the steel structure under test. After starting the conveyor motor, the tested steel structure is output from the frame.

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