Automatic loading detection device for bearing capacity of prefabricated staircase

Abstract

The invention relates to the technical field of building prefabricated part detection equipment, in particular to a prefabricated stair bearing capacity automatic loading detection device which comprises a base, two T-shaped guide rails and a plurality of mounting frames are arranged on the base, each mounting frame comprises two vertical stand columns and a cross beam, and the two ends of each cross beam are connected with the top ends of the two stand columns; the first lead screw transmission assembly is arranged on the stand column, when the prefabricated stair component is detected, a first lead screw is vertically upward under the counter-acting force of the prefabricated stair component, the first lead screw is parallel to the stand column under the counter-acting force of the prefabricated stair component, and swing of the top end of the stand column is limited by the cross beam; the lower ends of the two stand columns are connected with the T-shaped guide rail in a sliding mode, so that the stand columns are prevented from flexural deformation when bearing counter-acting force of the prefabricated stair component, the problem of detection data deviation caused by structural deformation is solved, and the bearing capacity of the prefabricated stair component and the accuracy of anti-flexural data are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of building prefabricated component detection equipment, in particular to an automatic loading detection device for the bearing capacity of a prefabricated staircase. Background Art

[0002] In order to ensure the structural safety and stability of plate-type prefabricated staircase components, each batch of plate-type prefabricated staircase components produced needs to undergo structural performance testing to verify the load-bearing capacity and anti-deflection data of the plate-type prefabricated staircase components. The traditional plate-type prefabricated staircase component testing device is an integral type, which makes it difficult to place the plate-type prefabricated staircase components during actual testing, and the accuracy of the test data is poor, which is easily affected by the deflection of the plate-type prefabricated staircase components.

[0003] In response to the above problems, the existing technology provides some solutions. For example, the invention patent with patent application number 202411328984.6 provides a precast concrete slab staircase structural performance test device. The invention detects the condition of the bottom surface of the stairs through a first pressure sensor and a laser ranging sensor, and then can detect the deflection and deformation of the stairs. The deflection and deformation data of the bottom surface of the stairs can be detected by the first pressure sensor and the laser ranging sensor. It can be widely used in deflection and deformation detection scenarios and can ensure the accuracy of the deflection detection data of slab precast staircase components; however, this technical solution mainly relies on the traditional hydraulic loading test method, and is a single-point hydraulic loading method. The supporting structure of the detection device is prone to flexural deformation when subjected to force, which not only affects the accuracy of load transfer, but also interferes with the displacement measurement data, reducing the credibility of the test results. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic loading detection device for the bearing capacity of prefabricated stairs to solve the problem in the prior art that the test results cannot specifically reflect the changes in the stairs, and at the same time solve the problem that the supporting structure of the detection device is prone to deflection when subjected to force, thereby causing deviations in the detection results.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A prefabricated staircase bearing capacity automatic loading detection device includes a base, a support frame, a guide frame, an optical ranging module and a data processing module. The support frame and the data processing module are fixedly mounted on the base. Two V-shaped guide rails are fixedly mounted on the base. The two V-shaped guide rails are symmetrically arranged and arranged along the front and back of the base. The guide frame is slidably mounted on the two V-shaped guide rails. A hydraulic support module is provided on the guide frame. The hydraulic support module includes two hydraulic cylinders and a support plate. The two hydraulic cylinders are fixedly mounted on the guide frame. The support plate is arranged at the upper end of the hydraulic cylinder. , and the output ends of the two hydraulic cylinders are fixedly connected to the support plate, and a No. 3 screw transmission assembly is provided on the base, and the No. 3 screw transmission assembly includes a No. 3 screw, a No. 3 nut and a No. 3 drive motor, the No. 3 screw is rotatably connected to the base, and the No. 3 screw is arranged parallel to the V-shaped guide rail, the No. 3 drive motor is fixedly connected to the base, the output shaft of the No. 3 drive motor is coaxially fixedly connected to the No. 3 screw, the No. 3 nut is threadedly connected to the No. 3 screw, the No. 3 nut is fixedly connected to the guide frame, and the No. 3 drive motor is electrically connected to the data processing module.

[0007] Furthermore, the base is provided with two T-shaped guide rails and multiple mounting brackets, the mounting bracket includes two vertical columns and a crossbeam, the two ends of the crossbeam are connected to the top ends of the two columns, the two T-shaped guide rails are symmetrically arranged, and the lower ends of the multiple columns are slidably connected to the T-shaped guide rails, each of the columns is provided with a set of vertically arranged No. 1 screw rod transmission components, the No. 1 screw rod transmission component includes a No. 1 screw rod, a No. 1 nut and a No. 1 drive motor, the No. 1 screw rod is vertically arranged, and the No. 1 screw rod is rotatably connected to the mounting bracket, the No. 1 drive motor is fixedly connected to the mounting bracket, and the No. 1 The output shaft of the No. 1 drive motor is coaxially fixedly connected to the No. 1 screw rod, and the No. 1 nut is threadedly connected to the No. 1 screw rod. A pressure block is provided between the two groups of No. 1 screw rod transmission assemblies on each of the mounting frames, and the pressure blocks are respectively connected to the No. 1 nuts in the No. 1 screw rod transmission assemblies on the left and right sides. Two groups of optical ranging modules are symmetrically provided on the base, and the two groups of optical ranging modules are both located in the vertical projection of the prefabricated staircase component. A torque sensor is provided on the No. 1 drive motor of each No. 1 screw rod transmission assembly, and the No. 1 drive motor, optical ranging module, and torque sensor are all electrically connected to the data processing module.

[0008] Before inspecting the prefabricated stair components, the prefabricated stair components are hoisted onto the support frame and the support plate, and the two hydraulic cylinders are started to push the support plate to a horizontal position, and the support plate is pushed until the step surface of the prefabricated stair components is in a horizontal state; the multiple mounting frames are moved to the set positions, and the mounting frames are fixed to the base; the No. 1 drive motor is started to rotate forward, and the No. 1 drive motor drives the No. 1 screw rod to rotate forward, and the No. 1 nut moves downward. It is worth noting that when the No. 1 drive motor is set to rotate forward, the No. 1 screw rod rotates forward, and the No. 1 nut moves downward; the downward movement of the No. 1 nut drives the pressure block to move downward until the pressure block After the block contacts the prefabricated stair component, the torque of the No. 1 drive motor gradually increases, and the torque of the motor is converted into the downward force of the pressure block on the prefabricated stair component through the No. 1 screw rod and the No. 1 nut. The torque of the No. 1 drive motor can be obtained through the torque sensor, and the pressure applied by the pressure block on the prefabricated stair component can be obtained through the data processing module. The distance between the lower surface of the prefabricated stair component and the upper surface of the base is measured by the optical ranging module. The data processing module obtains the bearing capacity and anti-deflection data of the prefabricated stair component by analyzing the change in the distance between the lower surface of the prefabricated stair component and the upper surface of the base under each pressure data.

[0009] By arranging a No. 1 screw drive assembly on the column, when the prefabricated stair component is inspected, the No. 1 screw is vertically upward by the reaction force of the prefabricated stair component. Since the No. 1 screw is arranged on the column, the No. 1 screw is parallel to the column by the reaction force of the prefabricated stair component. Since a crossbeam is arranged between the two columns on each of the mounting frames, the crossbeam limits the swinging of the top end of the column. The lower ends of the two columns are slidably connected to the T-shaped guide rail, thereby avoiding the column from being flexurally deformed when subjected to the reaction force of the prefabricated stair component, avoiding the problem of detection data deviation caused by structural deformation, and ensuring the bearing capacity of the prefabricated stair component and the accuracy of the anti-flexure data.

[0010] Furthermore, during the inspection process of the prefabricated stairs, the base does not deform, and the optical ranging module is arranged on the base to prevent the problem of the reference changing, and the optical ranging module is arranged into two groups on the left and right. Through the cross-data processing of the two groups of optical ranging modules, the deviation or distortion of the data of a single group of optical ranging modules after the prefabricated stairs are bent and deformed can be avoided, thereby ensuring the accuracy of the anti-bending data of the prefabricated staircase components.

[0011] Preferably, a plurality of mounting seats are provided on the upper end surface of the pressing block, and two steel cables are provided between the two groups of No. 1 screw transmission assemblies on each of the mounting frames, and the two ends of the two steel cables are respectively fixedly connected to the No. 1 nuts in the No. 1 screw transmission assemblies on both sides, and both of the steel cables pass through the mounting seats of the corresponding pressing blocks, and both of the steel cables are fixedly connected to the mounting seats, the length of the steel cable is L1, and the minimum distance between the No. 1 nuts in the two groups of No. 1 screw transmission assemblies on each of the mounting frames is L2, and L1>L2, the lower end of the pressing block is provided with an arc surface, and each of the mounting frames is provided with two downward-measuring laser ranging sensors, and the multiple laser ranging sensors are electrically connected to the data processing module, and the multiple laser ranging sensors are respectively located in the vertical projection surfaces of the nuts of the multiple No. 1 screw transmission assemblies.

[0012] The pressure block is connected to the No. 1 nut by using a steel cable, and an arc-shaped surface is provided on the lower end surface of the pressure block. When the prefabricated stair component is inspected, the height of the No. 1 nut is measured and fed back by the laser ranging sensor, and the two No. 1 nuts on the same mounting frame are controlled to be at different heights, thereby changing the angle between the steel cable and the horizontal plane, and then changing the angle between the pressure block and the horizontal plane; since the lower side of the pressure block is provided with an arc-shaped surface, the position of the pressure block acting on the prefabricated stair component is changed, thereby achieving the application of non-uniform load on the prefabricated stair component, simulating the stress conditions of more complex prefabricated stair components, and being more in line with actual use conditions, so that the bearing capacity and anti-deflection data of the prefabricated stair components are more comprehensive.

[0013] Furthermore, by arranging two steel cables on each pressing block, it is avoided that after the pressing block applies pressure to the prefabricated staircase component, the pressing block is shifted in position under the action of the reaction force, causing the force point of the pressing block on the prefabricated staircase component to shift, thereby affecting the experimental data, thereby ensuring the accuracy of the bearing capacity and anti-deflection data of the prefabricated staircase component.

[0014] Preferably, the arcuate surface is provided with a plurality of grooves, the plurality of grooves are arranged at equal intervals, and the opening directions of the plurality of grooves are toward the left and right sides, and the surface of the arcuate surface is treated to 50-60HRC by a surface hardening process.

[0015] The multiple grooves prevent the compression block from slipping against the prefabricated staircase components after they flex under pressure, potentially shifting the point at which the compression block acts on the components and affecting the test data. This ensures the accuracy of the prefabricated staircase component's load-bearing capacity and deflection resistance data. Furthermore, by hardening the curved surface to 50-60 HRC, wear or elastic deformation of the curved surface upon contact with the prefabricated staircase components is avoided, thereby preventing test data deviations caused by structural deformation and ensuring the accuracy of the prefabricated staircase component's load-bearing capacity and deflection resistance data.

[0016] Preferably, the support frame is provided with a T-slot running through the left and right sides, and a No. 2 screw rod is provided in the T-slot, and the No. 2 screw rod is rotatably connected to the support frame, and a No. 2 drive motor is provided at one end of the support frame, and the output shaft of the No. 2 drive motor is coaxially and fixedly connected to the No. 2 screw rod, and a No. 1 thread and a No. 2 thread are provided on the No. 2 screw rod, and the No. 1 thread and the No. 2 thread are symmetrical to each other and rotate in opposite directions, and the No. 1 thread and the No. 2 thread are both threadedly connected with a No. 2 nut, and the upper end surfaces of the two No. 2 nuts are provided with clamping blocks, and the clamping blocks extend to the outside of the support frame.

[0017] By setting the No. 2 screw and the pressure block, before the inspection of the prefabricated staircase components, the No. 2 drive motor drives the No. 2 screw to rotate, and the No. 2 screw drives the two No. 2 nuts to move towards each other, and the two clamping blocks respectively move towards the prefabricated staircase components until the two clamping blocks are in contact with the sides of the prefabricated staircase components, thereby completing the centering of the prefabricated staircase components, ensuring that the prefabricated staircase components are in the middle position of the base, ensuring the accuracy of the measurement results of the prefabricated staircase components by the optical ranging modules on both sides, and ensuring the accuracy of the anti-deflection data of the prefabricated staircase components.

[0018] Furthermore, by clamping the prefabricated staircase components in the center with the clamping blocks, the accuracy of the position of the pressure block on the prefabricated staircase components is ensured, avoiding the problem of the force point of the pressure block on the prefabricated staircase components being offset, thereby affecting the experimental data, and ensuring the accuracy of the bearing capacity and anti-deflection data of the prefabricated staircase components.

[0019] Preferably, a plurality of protrusions are provided on one side wall of the two clamping blocks facing each other, the plurality of protrusions are all conical, and the large ends of the protrusions are connected to the side wall of the clamping block.

[0020] By arranging a plurality of conical protrusions on a side wall of the clamping block close to the prefabricated stair component, when the two clamping blocks clamp the prefabricated stair component, the tips of the protrusions are embedded in the prefabricated stair component, thereby preventing the lower side of the prefabricated stair component from warping after being subjected to force, or the lower side of the prefabricated stair component from twisting when the prefabricated stair component is subjected to uneven load, thereby affecting the experimental data, thereby ensuring the accuracy of the bearing capacity and anti-deflection data of the prefabricated stair component.

[0021] Preferably, wing plates are provided on both the front and rear sides of the mounting frame, the cross section of the mounting frame is a channel steel structure, and the notch faces inward, and the No. 1 screw in the No. 1 screw transmission assembly is rotatably installed in the notch of the column.

[0022] By arranging wing plates on the front and rear sides of the mounting frame, the columns and beams are both channel steel structures, thereby improving the flexural deformation resistance of the columns and beams, and the No. 1 screw is rotatably installed in the slot of the column, further avoiding the flexural deformation of the column when it is subjected to the reaction force of the prefabricated staircase components, avoiding the problem of detection data deviation caused by structural deformation, and ensuring the bearing capacity of the prefabricated staircase components and the accuracy of the anti-flexural data.

[0023] Preferably, a limiting column is provided on the base, and the limiting column is provided on the front side of the support frame. The height of the limiting column is H1, and the height of the support frame is H2, and H1>H2.

[0024] By setting limit columns on the base, when the prefabricated staircase components are tested, the limit columns limit the prefabricated staircase components from moving forward after being subjected to force, thereby affecting the experimental data, thereby ensuring the accuracy of the bearing capacity and anti-deflection data of the prefabricated staircase components.

[0025] Preferably, a rack is provided on the upper end face of any of the T-shaped guide rails, the rack is of the same length as the T-shaped guide rail and is arranged parallel to it, a stepper motor and a gear set are provided on the column, the output shaft of the stepper motor is coaxially fixedly connected to the input wheel of the gear set, and the output wheel of the gear set is meshed with the rack.

[0026] Through the arrangement of the rack, stepper motor and gear set, when the prefabricated stair components are hoisted onto the support frame and the support plate, the stepper motor drives the gear set to rotate, and under the meshing action of the gear set and the rack, the mounting frame slides on the T-shaped guide rail and moves toward the rear end of the T-shaped guide rail, thereby avoiding the prefabricated stair components and facilitating the hoisting of the prefabricated stair components onto the support frame and the support plate; after the prefabricated stair components are hoisted onto the support frame and the support plate, the stepper motor drives the mounting frame to move along the T-shaped guide rail to the set position, and the prefabricated stair components can be inspected, thereby improving the degree of automation of the equipment; not only that, by adjusting the position of the mounting frame, prefabricated stair components with different step widths can be inspected, thereby improving the applicability of the equipment.

[0027] Preferably, two visual sensors are provided on the base, both of the visual sensors are located within the vertical projection of the prefabricated staircase component, and both of the visual sensors are electrically connected to the data processing module.

[0028] By arranging two visual sensors on the base, when the prefabricated staircase detection component is inspected, the surface image of the lower surface of the prefabricated staircase component is obtained through the visual sensor, and the position and size of the surface cracks are obtained. Through the intelligent sensing system composed of a torque sensor, an optical ranging module, a laser ranging sensor and a visual sensor, the integrity and accuracy of the detection data of the prefabricated staircase component are improved; further, through the cross-data processing of the two visual sensors, the imaging blind spots and image distortion of a single visual sensor after the prefabricated staircase is deflected can be avoided, thereby ensuring the accuracy of the anti-deflection data of the prefabricated staircase component.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention arranges a No. 1 screw drive assembly on the column. When the prefabricated staircase component is inspected, the No. 1 screw is vertically upward by the reaction force of the prefabricated staircase component, and the No. 1 screw is parallel to the column by the reaction force of the prefabricated staircase component. The crossbeam limits the top end of the column from swinging. The lower ends of the two columns are slidably connected to the T-shaped guide rail, thereby avoiding the column from being flexurally deformed when subjected to the reaction force of the prefabricated staircase component, avoiding the problem of detection data deviation caused by structural deformation, and ensuring the bearing capacity of the prefabricated staircase component and the accuracy of the anti-flexure data.

[0031] 2. The present invention uses a steel cable to connect the pressure block and the No. 1 nut, and provides an arc surface on the lower end surface of the pressure block. When inspecting prefabricated stair components, the two No. 1 nuts on the same mounting frame are controlled to be at different heights, thereby changing the angle between the pressure block and the horizontal plane, changing the position of the pressure block acting on the prefabricated stair component, and realizing the application of non-uniform load on the prefabricated stair component, simulating more complex stress conditions of prefabricated stair components, and more in line with actual usage conditions, thereby making the load-bearing capacity and anti-deflection data of the prefabricated stair components more comprehensive.

[0032] 3. The present invention arranges the No. 2 screw and the pressure block. Before the inspection of the prefabricated staircase components, the No. 2 screw is rotated to drive the two clamping blocks to move respectively in the direction close to the prefabricated staircase components, thereby completing the centering of the prefabricated staircase components, ensuring that the prefabricated staircase components are in the middle position of the base, ensuring the accuracy of the measurement results of the prefabricated staircase components by the optical ranging modules on both sides, and ensuring the accuracy of the anti-deflection data of the prefabricated staircase components. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the overall structure of the automatic loading detection device for the bearing capacity of prefabricated stairs during detection according to the present invention;

[0034] Figure 2 This is a front view of the automatic loading detection device for the bearing capacity of prefabricated stairs of the present invention;

[0035] Figure 3 for Figure 1 Magnified view at point A in the middle;

[0036] Figure 4 Schematic diagram of the overall structure of the automatic loading detection device for the bearing capacity of prefabricated stairs of the present invention when not testing;

[0037] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0038] Figure 6 It is a structural schematic diagram of the pressing block in the automatic loading detection device for the bearing capacity of prefabricated stairs of the present invention.

[0039] In the figure: 1. Base; 2. Support frame; 3. Guide frame; 4. Optical ranging module; 5. Data processing module; 6. V-shaped guide rail; 7. Hydraulic cylinder; 8. Support plate; 9. T-shaped guide rail; 10. Column; 11. Beam; 12. Screw rod No. 1; 13. Nut No. 1; 14. Drive motor No. 1; 15. Pressure block; 16. Mounting seat; 17. Steel cable; 18. Arc surface; 19. Groove; 20. T-slot; 21. Screw rod No. 2; 22. Nut No. 2; 23. Drive motor No. 2; 24. Clamp; 25. Protrusion; 26. Wing plate; 27. Limit column; 28. Rack; 29. ​​Stepper motor; 30. Gear set; 31. Visual sensor; 32. Screw rod No. 3; 33. Nut No. 3; 34. Drive motor No. 3; 35. Prefabricated staircase component. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention; please refer to Figures 1 to 6 The present invention provides an automatic loading detection device for the bearing capacity of prefabricated stairs, and the technical solution is as follows:

[0041] See also Figure 1 、 Figure 3 and Figure 4, a prefabricated stair bearing capacity automatic loading detection device, including a base 1, a support frame 2, a guide frame 3, an optical ranging module 4 and a data processing module 5, the support frame 2 and the data processing module 5 are fixedly installed on the base 1, two V-shaped guide rails 6 are fixedly installed on the base 1, the two V-shaped guide rails 6 are symmetrically arranged and arranged along the front and back of the base 1, the guide frame 3 is slidably installed on the two V-shaped guide rails 6, a hydraulic support module is provided on the guide frame 3, the hydraulic support module includes two hydraulic cylinders 7 and a support plate 8, the two hydraulic cylinders 7 are fixedly installed on the guide frame 3, the support plate 8 is arranged at the upper end of the hydraulic cylinder 7, and the two hydraulic The output ends of the pressure cylinders 7 are fixedly connected to the support plates 8, and a No. 3 screw rod 32 transmission assembly is provided on the base 1. The No. 3 screw rod 32 transmission assembly includes a No. 3 screw rod 32, a No. 3 nut 33 and a No. 3 drive motor 34. The No. 3 screw rod 32 is rotatably connected to the base 1, and the No. 3 screw rod 32 is arranged parallel to the V-shaped guide rail 6. The No. 3 drive motor 34 is fixedly connected to the base 1, and the output shaft of the No. 3 drive motor 34 is coaxially fixedly connected to the No. 3 screw rod 32. The No. 3 nut 33 is threadedly connected to the No. 3 screw rod 32. The No. 3 nut 33 is fixedly connected to the guide frame 3, and the No. 3 drive motor 34 is electrically connected to the data processing module 5.

[0042] Furthermore, two T-shaped guide rails 9 and multiple mounting frames are provided on the base 1. The mounting frame includes two vertical columns 10 and a crossbeam 11. The two ends of the crossbeam 11 are connected to the top ends of the two columns 10. The two T-shaped guide rails 9 are symmetrically arranged, and the lower ends of multiple columns 10 are slidably connected to the T-shaped guide rails 9. Each column 10 is provided with a set of vertically arranged No. 1 screw transmission components. The No. 1 screw transmission component includes No. 1 screw rod 12, No. 1 nut 13 and No. 1 drive motor 14. The No. 1 screw rod 12 is vertically arranged and rotatably connected to the mounting frame. The No. 1 drive motor 14 is fixedly connected to the mounting frame. The output shaft of the No. 1 drive motor 14 is coaxially fixedly connected to the No. 1 screw rod 12. The No. 1 nut 13 is threadedly connected to the No. 1 screw rod 12. Wing plates 26 are provided on the front and back sides of the mounting frame. The cross section of the mounting frame is a channel steel structure with the notch facing inward. The No. 1 screw rod The No. 1 screw rod 12 in the transmission assembly is rotatably installed in the slot of the column 10; a pressure block 15 is provided between the two groups of No. 1 screw rod transmission assemblies on each mounting frame, and the pressure block 15 is respectively connected to the No. 1 nut 13 in the No. 1 screw rod transmission assembly on the left and right sides. Two groups of optical ranging modules 4 are symmetrically provided on the base 1, and the two groups of optical ranging modules 4 are both located in the vertical projection of the prefabricated stair component 35. A torque sensor is provided on the No. 1 drive motor 14 of each No. 1 screw rod transmission assembly, and two visual sensors 31 are provided on the base 1. The two visual sensors 31 are both located in the vertical projection of the prefabricated stair component 35. The No. 1 drive motor 14, the optical ranging module 4, the torque sensor, and the visual sensor 31 are all electrically connected to the data processing module 5. The torque sensor, the optical ranging module 4, the laser ranging sensor, the visual sensor 31 and the data processing module 5 constitute an intelligent sensing system.

[0043] See also Figure 4 and Figure 6 , a plurality of mounting seats 16 are provided on the upper end surface of the pressing block 15, and two steel cables 17 are provided between the two sets of No. 1 screw drive assemblies on each mounting frame. The two ends of the two steel cables 17 are fixedly connected to the No. 1 nuts 13 in the No. 1 screw drive assemblies on both sides, and the two steel cables 17 pass through the mounting seats 16 of the corresponding pressing block 15. The two steel cables 17 are fixedly connected to the mounting seats 16. The length of the steel cables 17 is 2000mm, and the minimum distance between the No. 1 nuts in the two sets of No. 1 screw drive assemblies on each mounting frame is 18 00mm, an arc-shaped surface 18 is provided at the lower end of the pressing block 15, and two downward-measuring laser ranging sensors are provided on each mounting bracket. The multiple laser ranging sensors are electrically connected to the data processing module 5, and the multiple laser ranging sensors are respectively located in the vertical projection plane of the nuts of the multiple No. 1 screw transmission assemblies; a plurality of grooves 19 are provided on the arc-shaped surface 18, and the multiple grooves 19 are arranged at equal intervals, and the opening direction of the multiple grooves 19 is toward the left and right sides, and the surface of the arc-shaped surface 18 is treated to 52-55HRC by a surface hardening process.

[0044] See also Figure 4 and Figure 5 The support frame 2 is provided with a T-slot 20 running through the left and right sides, and a second screw rod 21 is provided in the T-slot 20, and the second screw rod 21 is rotatably connected to the support frame 2. One end of the support frame 2 is provided with a second drive motor 23, and the output shaft of the second drive motor 23 is coaxially fixedly connected to the second screw rod 21. A No. 1 thread and a No. 2 thread are provided on the No. 2 screw rod 21, and the No. 1 thread and the No. 2 thread are symmetrical with each other and have opposite rotation directions. A No. 2 nut 22 is threadedly connected to the No. 1 thread and the No. 2 thread, and the upper end surfaces of the two No. 2 nuts 22 are provided with a clamping block 24, which extends to the outside of the support frame 2; a plurality of protrusions 25 are provided on the side walls facing each other of the two clamping blocks 24, and the plurality of protrusions 25 are conical, and the large ends of the protrusions 25 are connected to the side walls of the clamping block 24; a limiting column 27 is provided on the base 1, and the limiting column 27 is provided on the front side of the support frame 2. The height of the limiting column 27 is 300mm, and the height of the support frame 2 is 450mm.

[0045] See also Figure 3 and Figure 4 A rack 28 is provided on the upper end surface of the T-shaped guide rail 9 on the right side. The rack 28 is of the same length and parallel to the T-shaped guide rail 9. A stepper motor 29 and a gear set 30 are provided on the column 10. The output shaft of the stepper motor 29 is coaxially fixedly connected to the input wheel of the gear set 30, and the output wheel of the gear set 30 is meshed with the rack 28.

[0046] How it works: See Figures 1 to 6Before inspecting the prefabricated staircase component 35, the prefabricated staircase component 35 is hoisted onto the support frame 2 and the support plate 8, and the two hydraulic cylinders 7 are started to push the support plate 8 up to the horizontal level, and the support plate 8 is pushed up until the step surface of the prefabricated staircase component 35 is in a horizontal state; before inspecting the prefabricated staircase component 35, the No. 2 drive motor 23 drives the No. 2 screw rod 21 to rotate, and the No. 2 screw rod 21 drives the two No. 2 nuts 22 to move toward each other, and the two clamping blocks 24 are respectively moved toward the prefabricated staircase component 3 5, until the two clamping blocks 24 are in contact with the sides of the prefabricated staircase component 35, thereby completing the centering of the prefabricated staircase component 35; the gear set 30 is driven to rotate by the stepping motor 29, and under the meshing action of the gear set 30 and the rack 28, the mounting bracket slides on the T-shaped guide rail 9 until the mounting bracket moves to the set position along the T-shaped guide rail 9, and the stepping motor 29 is stopped; the No. 1 drive motor 14 is started to rotate forward, and the No. 1 drive motor 14 drives the No. 1 screw rod 12 to rotate forward, and the No. 1 nut 13 moves downward. It is worth mentioning that It is clear that when the No. 1 drive motor 14 is set to rotate forward, the No. 1 screw rod 12 rotates forward, and the No. 1 nut 13 moves downward; the downward movement of the No. 1 nut 13 drives the pressure block 15 to move downward until the pressure block 15 contacts the prefabricated stair component 35, and the torque of the No. 1 drive motor 14 gradually increases. The torque of the motor is converted into the downward force of the pressure block 15 on the prefabricated stair component 35 through the No. 1 screw rod 12 and the No. 1 nut 13. The torque of the No. 1 drive motor 14 can be obtained by the torque sensor, and the pressure applied by the pressure block 15 on the prefabricated stair component 35 can be obtained by the data processing module 5. The distance between the lower surface of the prefabricated stair component 35 and the upper surface of the base plate is measured by the optical ranging module 4. The data processing module 5 analyzes the change in the distance between the lower surface of the prefabricated stair component 35 and the upper surface of the base plate under each pressure data to obtain the bearing capacity and anti-deflection data of the prefabricated stair component 35, and obtains the surface image of the lower surface of the prefabricated stair component 35 through the visual sensor 31 to obtain the position and size of the surface cracks.

[0047] When inspecting the prefabricated stair component 35, the height of the No. 1 nut 13 is measured and fed back by a laser ranging sensor, and the two No. 1 nuts 13 on the same mounting frame are controlled to be at different heights, thereby changing the angle between the steel cable 17 and the horizontal plane, and then changing the angle between the pressure block 15 and the horizontal plane; since the lower side of the pressure block 15 is provided with a curved surface 18, the position of the pressure block 15 acting on the prefabricated stair component 35 is changed, thereby achieving the application of non-uniform load on the prefabricated stair component 35, simulating a more complex stress condition of the prefabricated stair component 35, and being more in line with actual usage conditions.

[0048] A specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiment described above. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A prefabricated staircase bearing capacity automatic loading detection device, comprising a base (1), a support frame (2), a guide frame (3), an optical distance measurement module (4) and a data processing module (5), wherein the support frame (2) and the data processing module (5) are both fixedly mounted on the base (1), the guide frame (3) is slidably mounted on the base (1), and a hydraulic support module is provided on the guide frame (3), characterized in that: The base (1) is provided with two T-shaped guide rails (9) and a plurality of mounting brackets, wherein the mounting brackets include two vertical columns (10) and a crossbeam (11), the two ends of the crossbeam (11) are connected to the top ends of the two columns (10), the two T-shaped guide rails (9) are symmetrically arranged, and the lower ends of the plurality of columns (10) are all slidably connected to the T-shaped guide rails (9), each of the columns (10) is provided with a set of vertically arranged No. 1 screw drive components, and the two sets of No. 1 screw drive components on each mounting bracket are connected to the two sets of No. 1 screw drive components. A pressing block (15) is provided between the components, and the pressing block (15) is respectively connected to the No. 1 nut (13) in the No. 1 screw transmission component on the left and right sides. Two groups of optical ranging modules (4) are symmetrically provided on the base (1), and the two groups of optical ranging modules (4) are both located in the vertical projection of the prefabricated staircase component (35). A torque sensor is provided on the No. 1 drive motor (14) of each No. 1 screw transmission component, and the optical ranging module (4) and the torque sensor are both electrically connected to the data processing module (5).

2. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 1 is characterized in that: A plurality of mounting seats (16) are provided on the upper end surface of the pressure block (15), and two steel cables (17) are provided between the two groups of No. 1 screw transmission assemblies on each of the mounting frames. The two ends of the two steel cables (17) are fixedly connected to the No. 1 nuts (13) in the No. 1 screw transmission assemblies on both sides, and the two steel cables (17) pass through the mounting seats (16) of the corresponding pressure blocks (15). The two steel cables (17) are fixedly connected to the mounting seats (16). The length of the steel cables (17) is The minimum distance between the No. 1 nuts (13) in the two No. 1 screw transmission assemblies on each mounting frame is L1, and L1>L2. The lower end of the pressure block (15) is provided with an arc surface (18). Two downward ranging laser distance measuring sensors are provided on each crossbeam (11). The plurality of laser distance measuring sensors are electrically connected to the data processing module (5). The plurality of laser distance measuring sensors are respectively located in the vertical projection planes of the No. 1 nuts (13) of the plurality of No. 1 screw transmission assemblies.

3. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 2 is characterized in that: The arc surface (18) is provided with a plurality of grooves (19), which are arranged at equal intervals and are opened towards the left and right sides. The surface of the arc surface (18) is treated to 50-60HRC by a surface hardening process.

4. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 2 is characterized in that: The support frame (2) is provided with a T-shaped slot (20) running through the left and right sides, and a second screw rod (21) is provided in the T-shaped slot (20), and the second screw rod (21) is rotatably connected to the support frame (2). One end of the support frame (2) is provided with a second drive motor (23), and the output shaft of the second drive motor (23) is coaxially fixedly connected to the second screw rod (21). The second screw rod (21) is provided with a first thread and a second thread, and the first thread and the second thread are symmetrical to each other and have opposite rotation directions. The first thread and the second thread are both threadedly connected with a second nut (22), and a clamping block (24) is provided on the upper end surface of the two second nuts (22), and the clamping block (24) extends to the outside of the support frame (2).

5. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 4 is characterized in that: A plurality of protrusions (25) are provided on one side wall of the two clamping blocks (24) facing each other. The plurality of protrusions (25) are all conical, and the large ends of the protrusions (25) are connected to the side wall of the clamping block (24).

6. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 2 is characterized in that: The front and rear sides of the mounting frame are both provided with wing plates (26). The cross section of the mounting frame is a channel steel structure with the notch facing inward. The first screw rod (12) in the first screw rod transmission assembly is rotatably mounted in the notch of the column (10).

7. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 1 is characterized in that: The base (1) is provided with a limiting column (27), the limiting column (27) is provided on the front side of the support frame (2), the height of the limiting column (27) is H1, the height of the support frame (2) is H2, and H1>H2.

8. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 1 is characterized in that: A rack (28) is provided on the upper end surface of any of the T-shaped guide rails (9), and the rack (28) is equal in length to the T-shaped guide rail (9) and is arranged in parallel. A stepper motor (29) and a gear set (30) are provided on the mounting frame, and the output shaft of the stepper motor (29) is coaxially fixedly connected to the input wheel of the gear set (30), and the output wheel of the gear set (30) is meshed with the rack (28).

9. The automatic loading detection device for the bearing capacity of prefabricated stairs according to claim 1 is characterized in that: Two visual sensors (31) are provided on the base (1), both of the visual sensors (31) are located within the vertical projection of the prefabricated staircase component (35), and both of the visual sensors (31) are electrically connected to the data processing module (5).

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