Construction steel bar quality bearing degree detection equipment

Abstract

The invention relates to the technical field of steel bar bearing detection, and discloses construction steel bar quality bearing degree detection equipment which comprises a mounting frame, a telescopic mechanism, a limiting mechanism and a stress detection mechanism. The limiting mechanism comprises a central column and two discs vertically and fixedly connected to the two ends of the central column, each disc is provided with a plurality of installation positions evenly arranged in the circumferential direction of the disc, and each installation position is connected with a stress detection mechanism. The stress detection mechanism comprises a support, a pressed wheel rotationally connected to the support, two half wheels and a moving assembly, one ends of the two half wheels are connected to the support, and a reinforcing steel bar is placed between the pressed wheel and the half wheels; when a steel bar is detected, the half wheels are located above the pressed wheel, the two half wheels make contact and are combined into a whole, the telescopic mechanism stretches to press the steel bar downwards, the disc is driven to rotate when the telescopic mechanism resets, the two half wheels are located below the pressed wheel and are far away from each other, and the steel bar subjected to punching detection is separated from the stress detection mechanism. The accuracy and comparability of a detection result can be improved.

Description

Technical Field

[0001] This invention relates to the field of steel reinforcement load-bearing capacity testing technology, and in particular to a device for testing the quality and load-bearing capacity of building steel reinforcement. Background Technology

[0002] Steel bars are widely used in the construction industry and are an indispensable material. After production, steel bars undergo load-bearing tests using testing equipment to ensure that steel bars of different materials can be used in different fields.

[0003] Currently, the industry commonly uses universal testing machines or dedicated bending test devices to test the load-bearing capacity of reinforcing bars. The typical testing procedure is as follows: the operator manually places the reinforcing bar specimen on two fixed support rollers, and then applies a load (three-point bending or four-point bending) from above the reinforcing bar through a hydraulic or mechanical drive device until the reinforcing bar yields or fractures. The load-displacement curve is recorded by sensors to determine whether it is qualified. Due to the low level of automation and inefficiency of the aforementioned devices, other testing devices have emerged in the industry. For example, Chinese Patent No. CN119290618A discloses a steel bar bending resistance testing device for civil engineering. Its structure includes: a locator, a main unit, a control panel, a support column, a parallel plate, a testing structure, and a testing cavity. Based on the newly added components inside the testing cavity, three steel bars can be inserted in parallel simultaneously through the restraining plates on the left and right sides of the load-bearing body and three slots. This allows the middle section of the steel bar to be suspended in the cavity area. Therefore, when the testing structure presses down for testing, the two ends of the steel bar are restricted by the restraining plates and will not tilt, thereby improving the parallel fixation of the steel bar. This also prevents the middle section from shifting during the pressing test, thus improving the accuracy and safety factor of the steel bar testing. At the same time, the limiting ring at the edge of the slot, combined with the reinforcing column, can improve the overall hardness and avoid deformation caused by continuous pressure on the two ends of the steel bar. This ensures that the steel bar maintains a circular shape and prevents the steel bar from getting stuck inside after deformation.

[0004] When using such testing devices, the reinforcing bars need to be inserted into the restraint plate to test their load-bearing capacity. When taking out normal and deformed reinforcing bars, the internal reinforcing bars need to be pulled out one by one before new reinforcing bars can be placed. This method makes it difficult to ensure that the support point position of the reinforcing bars is exactly the same each time. Slight deviations may affect the accuracy and comparability of the test results, and also lead to low efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a testing device for the load-bearing capacity of reinforcing steel bars in buildings, which can improve the accuracy and comparability of the test results.

[0006] This invention provides a device for testing the load-bearing capacity of reinforcing steel bars in construction, including a mounting frame, a telescopic mechanism connected to the mounting frame and capable of pressing down on the reinforcing steel bars, a limiting mechanism connected to the telescopic mechanism via a first transmission component, and a force detection mechanism. The limiting mechanism includes: a central column rotatably connected to the mounting frame and two discs symmetrically and perpendicularly fixed to both ends of the central column. The discs are connected to the first transmission component to cause them to rotate. The central column is perpendicular to the telescopic direction of the telescopic mechanism. Each disc has multiple mounting positions evenly arranged along its circumference, and each mounting position is connected to a force detection mechanism. The force testing mechanism includes: a bracket fixed in the installation position, a pressure wheel rotatably connected to the bracket, two half-wheels facing the pressure wheel away from the central column, and a moving component that drives the two half-wheels to move closer or further apart. One end of each half-wheel is connected to the bracket, and the reinforcing bar is placed between the pressure wheel and the half-wheels. When testing the reinforcing bar, the half-wheels are located above the pressure wheel, and the two half-wheels are in contact and integrated. The telescopic mechanism extends and presses down on the reinforcing bar. When the telescopic mechanism resets, it drives the disc to rotate, and the two half-wheels are located below the pressure wheel and further apart. After the reinforcing bar is tested by the pressure, it is removed from the force testing mechanism.

[0007] Optionally, the telescopic mechanism includes a hydraulic telescopic rod, two fixed cylinders, and a transmission rod. The hydraulic telescopic rod is fixedly connected to the mounting frame, and the transmission rod is vertically fixedly connected to the hydraulic telescopic rod. The two fixed cylinders are set perpendicular to both ends of the central column and are rotatably connected to the mounting frame. The surface of the fixed cylinders is provided with a spiral groove, and a vertical groove is provided between the two ends of the spiral groove. The two ends of the transmission rod are slidably connected in the vertical groove or the spiral groove. The central column and the fixed cylinders are connected through a first transmission component.

[0008] Optionally, the first transmission component includes: a third gear shaft and a first bevel gear, the third gear shaft being fixedly connected to a fixed cylinder, the first bevel gear being fixedly connected to a central column, and the third gear shaft and the first bevel gear meshing perpendicularly.

[0009] Optionally, the force detection mechanism may also include a torsion spring column, which includes a column body and a torsion spring sleeved thereon. One end of the torsion spring is fixed to the column body, the bottom of the column body is fixed to the bottom wall of the mounting position, and a first gear shaft is movably inserted into the upper end of the column body. The end of the torsion spring away from the column body is fixed to the first gear shaft.

[0010] Optionally, the moving component includes: a deflection plate, two connecting rods hinged to both ends of the deflection plate, and a vertical plate vertically hinged to the connecting rods. The first gear shaft is fixedly connected to the deflection plate, and a slide is fixed at the mounting position. The two vertical plates are perpendicular to the slide and slide in a sliding fit. The deflection plate is connected to a moving component that drives it to reciprocate.

[0011] Optionally, the moving part includes a second gear shaft, and the bracket includes two side plates symmetrically fixed in the mounting position. The first gear shaft is perpendicularly meshed with the second gear shaft. One end of the second gear shaft is rotatably connected to the side plate. The lower end of the side plate is fixed to the slide. One end of the half wheel passes through the side plate and is rotatably connected to the vertical plate. The second gear shaft is connected to the through rod via a transmission belt. Both ends of the through rod are rotatably connected to the mounting position, and both ends pass through the vertical plate and the side plate in sequence. A pressure wheel is fixedly sleeved on the through rod.

[0012] Optionally, the limiting mechanism and the force detection mechanism are connected through a second transmission mechanism, which includes a fourth gear shaft and a second bevel gear. The fourth gear shaft is movably inserted into the disc, and the second bevel gear is fixedly sleeved on the outer wall of the column. The fourth gear shaft and the second bevel gear mesh perpendicularly.

[0013] Optionally, the limiting mechanism also includes: a hollow disc, a first arc toothed plate and a second arc toothed plate, a fourth gear shaft fixedly connected to a gear column, the hollow disc movably sleeved on the central column and coaxially arranged with the disc, the outer wall of the hollow disc fixedly connected to the first arc toothed plate, the outer side of the hollow disc provided with a second arc toothed plate, the second arc toothed plate fixedly connected to the bottom bracket, the bottom bracket fixedly connected to the bottom of the mounting frame, the hollow disc fixed to the bottom bracket, and the gear column capable of meshing with the first arc toothed plate or the second arc toothed plate.

[0014] Optionally, each disc has four mounting positions, a placement rack is fixed to one side of the bottom bracket, a placement mechanism is connected to the placement rack, a receiving compartment is fixed to the other side of the bottom bracket, and an inclined panel is provided in the lower middle part of the bottom bracket and is mounted on the bottom bracket.

[0015] Optionally, the mounting position is a groove formed on the outer periphery of the disc.

[0016] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art: The present invention provides a structural steel reinforcement quality load-bearing capacity testing device. In each stress testing mechanism, the two half-wheels and the pressure wheel together form a clamping unit for precise positioning of the steel reinforcement. The steel reinforcement is placed between the pressure wheel and the two half-wheels that are integrated into one unit, and its support point (the contact point with the pressure wheel) is strictly defined.

[0017] This structure rigidly defines the support span and force application point for each tested rebar, completely eliminating positional deviations caused by traditional manual placement or plug-and-play fixing methods. This ensures that test data for the same or different batches of rebars are obtained under identical geometric conditions, guaranteeing high accuracy and excellent comparability of test results, providing a reliable basis for rebar quality grading and qualification determination. Through the transmission connection between the telescopic mechanism and the limiting mechanism, a single testing cycle (pressing down, testing, resetting) and station switching are integrated. After a test is completed, the resetting process of the telescopic mechanism drives the central column and disc to rotate at a fixed angle, allowing the completed testing station to rotate out, while simultaneously accurately delivering a new station with a pre-placed rebar to the testing position. This enables parallel operation of testing and loading / unloading, allowing the equipment to remove tested rebars and install new ones in non-testing areas while the current rebar is being tested for load capacity. This fundamentally solves the problem of sequential extraction and low efficiency, achieving quasi-continuous operation and significantly increasing the testing throughput per unit time. At the inspection station, two half-wheels, driven by a moving component, come together to stably support the rebar. After inspection, as the disc rotates, the station moves to the loading / unloading area below. At this point, the moving component drives the two half-wheels away from each other, and the rebar, no longer supported, automatically detaches under gravity. The handling of rebar no longer requires complex manual insertion, extraction, or alignment operations. Especially for rebar that may have deformed (bent) after inspection, the automatic detachment mechanism avoids the safety risks and operational difficulties associated with manual forced extraction. The loading / unloading process is simple, fast, and safe, further improving overall efficiency and reducing labor intensity. All load-bearing inspection mechanisms are evenly distributed on the rotating disc, resulting in a symmetrical and compact structure. The integrated design minimizes the equipment's footprint. Simultaneously, the rotary indexing operation avoids unnecessary loads on the inspection mechanisms when not in use, ensuring more reasonable stress distribution on each component. Furthermore, the evenly distributed multiple identical stations around the disc balance the rotational load, ensuring smooth operation and helping to reduce fatigue wear on key components, thus improving the long-term operational stability and service life of the entire inspection equipment. Attached Figure Description

[0018] Figure 1 This is a frontal three-dimensional structural diagram of a building steel reinforcement quality and load-bearing capacity testing device provided in an embodiment of the present invention; Figure 2 This is a side-view three-dimensional structural diagram of a building steel reinforcement quality and load-bearing capacity testing device provided in an embodiment of the present invention; Figure 3 This is a cross-sectional three-dimensional structural schematic diagram of a building steel reinforcement quality and load-bearing capacity testing device provided in an embodiment of the present invention; Figure 4 A three-dimensional structural diagram showing the connection between the limiting mechanism and the force detection mechanism provided in an embodiment of the present invention; Figure 5 A three-dimensional structural diagram showing the connection between the telescopic mechanism and the force detection mechanism provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the force detection mechanism provided in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the limiting mechanism provided in an embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram of the placement mechanism provided in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the telescopic mechanism provided in an embodiment of the present invention; Figure 10 This is a three-dimensional structural diagram of the second transmission mechanism provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Mounting bracket; 2. Telescopic mechanism; 21. Hydraulic telescopic rod; 22. Fixed cylinder; 23. Spiral groove; 24. Transmission rod; 25. Circular column; 26. Third gear shaft; 3. First bevel gear; 4. Limiting mechanism; 41. Disc; 42. Mounting position; 43. Hollow disc; 44. First arc tooth plate; 45. Second arc tooth plate; 5. Second transmission mechanism; 51. Fourth gear shaft; 52. Gear column; 6. Force detection mechanism; 61. Torsion spring column; 62. Second bevel gear; 63. Deflection plate; 64. Connecting rod; 65. First gear shaft; 66. Second gear shaft; 67. Transmission belt; 68. Through rod; 69. Pressure wheel 610. Vertical plate; 611. Sliding chamber; 612. Half wheel; 613. Side plate; 7. Reinforcing bar; 8. Placement rack; 9. Placement mechanism; 91. Fixed rod; 92. Drive motor; 93. Rotating column; 94. First connecting rod; 95. First square block; 96. Rocking rod; 97. Concave plate; 98. Right angle plate; 99. Second connecting rod; 910. Second square block; 911. Moving column; 912. T-shaped telescopic column; 913. Movable chamber column; 914. Spring column; 915. Irregular plate; 916. Support column; 917. Mechanical gripper; 10. Bottom support; 11. Receiving chamber; 12. Sloping panel; 13. Central column. Detailed Implementation

[0020] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this 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 this invention.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment of the invention provides a load-bearing capacity testing device for reinforcing steel bars 7, including a mounting frame 1, a telescopic mechanism 2 connected to the mounting frame 1 and capable of pressing down on the reinforcing steel bars 7, a limiting mechanism 4 connected to the telescopic mechanism 2 via a first transmission component, and a force detection mechanism 6. The mounting frame 1 serves as the support and installation platform for the entire device and can be constructed by welding or bolting high-strength structural steel to ensure overall rigidity and stability, capable of withstanding the high loads and vibrations generated during the testing process. The telescopic mechanism 2 serves as the power and pressure application unit and can be a hydraulic cylinder, an electric push rod, or a servo electric cylinder. Its cylinder body or main body is fixed to the upper part of the mounting frame 1, with the piston rod or push rod facing downwards. This mechanism is responsible for providing controllable and repeatable downward pressure, acting directly or indirectly on the reinforcing steel bars 7 to be tested. The limiting mechanism 4 is a key mechanism for realizing the positioning of the reinforcing steel bars 7, the conversion of the testing station, and automated unloading. The limiting mechanism 4 includes: a central column 13 rotatably connected to the mounting frame 1 and two discs 41 symmetrically and vertically fixed to both ends of the central column 13. The discs 41 are connected to the first transmission component to make the discs 41 rotate. The central column 13 is perpendicular to the extension and retraction direction of the telescopic mechanism 2. The central column 13 is horizontally rotatably connected to the mounting frame 1 through bearings. Its axis is perpendicular to the extension and retraction (i.e., up and down) direction of the telescopic mechanism 2. The discs 41 have multiple mounting positions 42 evenly arranged along their circumference. The number of mounting positions 42 determines the number of steel bars 7 samples that the equipment can continuously detect in a single cycle, thus improving the batch detection efficiency. Each mounting position 42 is connected to a force detection mechanism 6, which is a unit that directly performs clamping, support and force measurement. The stress detection mechanism 6 includes: a bracket fixed at the mounting position 42; a pressure wheel 69 rotatably connected to the bracket; two half-wheels 612 facing the pressure wheel 69 away from the central column 13; and a moving component that moves the two half-wheels 612 closer to or further away from each other. The pressure wheel 69 serves as the lower support point (pressure bearing point) for the reinforcing bar 7 during testing. Rolling contact reduces friction interference with pressure measurement. One end of each of the two half-wheels 612 is connected to the bracket. The reinforcing bar 7 is placed between the pressure wheel 69 and the half-wheels 612, with the two half-wheels 612 facing each other and located on the side of the pressure wheel 69 away from the axis of the central column 13 (i.e., the outer side). The arc-shaped working surfaces of the two half-wheels 612 face each other and can be combined to form a complete circular or near-circular clamping / releasing cavity. The moving component controls the opening and closing of the half-wheels 612, realizing the clamping and releasing of the reinforcing bar 7. When testing the reinforcing bar 7, half-wheel 612 is located above the pressure wheel 69, and the two half-wheels 612 are in contact and integrated. The telescopic mechanism 2 extends and presses down on the reinforcing bar 7. When the telescopic mechanism 2 is reset, it drives the disc 41 to rotate. The two half-wheels 612 are located below the pressure wheel 69 and are far apart. After the pressing test, the reinforcing bar 7 is separated from the force testing mechanism 6.

[0023] During operation, a steel bar 7 to be tested is horizontally placed in the force-testing mechanism 6 at the top of the testing position. At this time, the two half-wheels 612 of the mechanism are in the closed position above, working together with the pressure roller 69 below to initially position the steel bar 7. The telescopic mechanism 2 is activated, and its piston rod extends downward, pressing down on the middle of the steel bar 7 at a constant speed or according to a preset pressure program. The pressure is transmitted through the steel bar 7 to the pressure roller 69 below. After the test is completed, the telescopic mechanism 2 retracts and resets. During its reset process, it drives the central column 13 and the two discs 41 to rotate synchronously by a fixed angle (i.e., degrees divided by the number of installation positions 42). This causes the steel bar 7 that has just completed the test and its force-testing mechanism 6 to leave the top testing position, while a new force-testing mechanism 6 with the steel bar 7 already installed is moved to the testing position, ready for the next test. The steel bar 7 that has completed the test rotates with its force-testing mechanism 6 to the bottom unloading position. At this time, the moving component of the force-testing mechanism 6 moves, driving the two half-wheels 612 away from each other. Since half-wheel 612 is now below the pressure wheel 69, the reinforcing bar 7 loses its support and lateral restraint, and automatically falls onto the collection box or conveyor belt below under the action of gravity, completing the automatic unloading. At the same time, the freed-up force detection mechanism 6 continues to rotate with the disc 41, and can be reloaded at subsequent workstations.

[0024] The present invention provides a load-bearing capacity testing device for building steel bars 7. In each load testing mechanism 6, the two half-wheels 612 and the pressure wheel 69 together form a clamping unit for precisely positioning the steel bar 7. The steel bar 7 is placed between the pressure wheel 69 and the two half-wheels 612 that are integrated together, and its support point (the contact point with the pressure wheel 69) is strictly defined.

[0025] This structure rigidly defines the support span and force application point for each tested rebar 7, completely eliminating positional deviations caused by traditional manual placement or plug-and-play fixing methods. This ensures that test data for the same or different batches of rebar 7 are obtained under identical geometric conditions, guaranteeing high accuracy and excellent comparability of test results, providing a reliable basis for rebar 7 quality grading and qualification determination. Through the transmission connection between the telescopic mechanism 2 and the limiting mechanism 4, a single testing cycle (pressing down, testing, resetting) and station transition are combined into one. When a test is completed, the resetting process of the telescopic mechanism 2 drives the central column 13 and the disc 41 to rotate at a fixed angle, causing the completed testing station to rotate out, while simultaneously accurately delivering a new station with a pre-placed rebar 7 to the testing position. This achieves parallel operation of testing and loading / unloading, allowing the equipment to perform load-bearing testing on the current rebar 7 while simultaneously removing the tested rebar 7 and installing a new rebar 7 in a non-testing area. This fundamentally solves the problem of sequential extraction and low efficiency, achieving quasi-continuous operation and significantly increasing the testing throughput per unit time. At the inspection station, the two half-wheels 612, driven by the moving component, come together to stably support the rebar 7. After inspection, as the disc 41 rotates, the station moves to the loading and unloading area below. At this time, the moving component drives the two half-wheels 612 away from each other, and the rebar 7, no longer supported, automatically falls off under gravity. The handling of the rebar 7 no longer requires complex manual insertion, extraction, or alignment operations. Especially for rebar 7 that may have been deformed (bent) after inspection, the automatic detachment mechanism avoids the safety risks and operational difficulties caused by manual forced extraction. The loading and unloading process is simple, fast, and safe, further improving overall efficiency and reducing labor intensity. All force-bearing detection mechanisms 6 are evenly distributed on the rotating disc 41, with a symmetrical and compact structure. The integrated design makes the equipment occupy a small area. At the same time, the rotary indexing operation avoids unnecessary loads on the detection mechanisms when not in operation, and the force on each component is more reasonable. In addition, the 41 discs are evenly arranged with multiple identical workstations, which balances the rotational load and ensures smooth operation. This helps reduce fatigue wear of key components and improves the long-term operational stability and service life of the entire testing equipment.

[0026] like Figure 5As shown, the telescopic mechanism 2 includes a hydraulic telescopic rod 21, two fixed cylinders 22 and a transmission rod 24. The hydraulic telescopic rod 21 is fixed to the mounting frame 1. The tail of the cylinder is rigidly fixed to the top crossbeam of the mounting frame 1 by a hinge or flange. The end of the piston rod is used to apply direct pressure to the reinforcing bar 7. The transmission rod 24 is vertically fixed to the hydraulic telescopic rod 21. Two fixed cylinders 22 are set perpendicular to both ends of the central column 13 and are rotatably connected to the mounting bracket 1. The surface of the fixed cylinders 22 is provided with a spiral groove 23. The central column 13 and the fixed cylinders 22 are connected through the first transmission component. The spiral groove 23 is an Archimedean spiral groove around the surface of the fixed cylinder 22 at a certain angle (e.g., ° or °). Its function is to guide the end of the transmission rod 24 and convert the vertical movement of the hydraulic telescopic rod 21 into the rotational movement of the fixed cylinder 22. A vertical groove is provided between the two ends of the spiral groove 23. The vertical groove is an axial straight groove parallel to the generatrix of the fixed cylinder 22. It connects the beginning and end of the spiral groove 23 to form a closed loop. Its function is to allow the transmission rod 24 to slide up and down in it without driving the fixed cylinder 22 to rotate, forming a continuous closed spatial trajectory groove. The transmission rod 24 is slidably connected at both ends to the vertical groove or helical groove 23. The transmission rod 24 is a rigid horizontal bar, vertically welded or rigidly connected to the piston rod of the hydraulic telescopic rod 21, and moves up and down synchronously with the piston rod. Each end of the transmission rod 24 is equipped with a guide bearing or slider, which is respectively embedded in the helical groove 23 / vertical groove on the surface of the two fixed cylinders 22. This connection is a sliding pair, allowing the end of the transmission rod 24 to move along the groove trajectory and converting its own vertical linear motion into a rotational drive for the fixed cylinders 22.

[0027] The workflow is as follows: The hydraulic telescopic rod 21 is in the retracted state, and the transmission rod 24 is at its highest point. At this time, the guide bearings at both ends of the transmission rod 24 are precisely located at the starting end of the spiral groove 23 on the two fixed cylinders 22 (i.e., the upper end connected to the vertical groove). The reinforcing bar 7 is installed in the detection mechanism at the top position. The hydraulic system drives the piston rod of the hydraulic telescopic rod 21 to extend downwards, and the transmission rod 24 moves vertically downwards accordingly. Since the end of the transmission rod 24 is at the top of the vertical groove at this time, it will slide freely within the vertical groove. During this stage, the end of the transmission rod 24 moves within the vertical groove without generating any circumferential force, so the fixed cylinders 22 remain stationary. All the kinetic energy of the hydraulic rod is used to stabilize and press down the reinforcing bar 7 for load-bearing testing, ensuring that the position of the force-bearing frame and the tested reinforcing bar 7 is absolutely stable during the testing process, and that the data is free from interference. After the test is completed, the hydraulic system reverses direction, and the piston rod of the hydraulic telescopic rod 21 begins to retract and move upwards. The transmission rod 24 rises accordingly. When its end rises from the bottom of the vertical groove to the connection point with the end of the spiral groove 23, it enters the track of the spiral groove 23. As the transmission rod 24 continues to move upward, its end, constrained by the inclined surface of the spiral groove 23, generates a tangential force that pushes the fixed cylinder 22 to rotate around its axis. This force drives the fixed cylinder 22 to rotate. The two fixed cylinders 22 are synchronously connected to the central column 13 of the limiting mechanism 4 through the transmission mechanism. Therefore, the rotation of the fixed cylinder 22 is transmitted to the central column 13, thereby driving the entire disk 41 and all force detection mechanisms 6 to rotate by a predetermined angle (this angle is determined by the rotation angle of the spiral groove 23; for example, if the spiral groove 23 rotates around the cylinder at °, then the disk 41 rotates at °, exchanging the detection station and the unloading station). When the end of the transmission rod 24 moves upward to the top of the spiral groove 23 (i.e., the beginning of the vertical groove), the fixed cylinder 22 has just rotated into position, and the hydraulic rod has also fully reset. The end of the transmission rod 24 disengages from the spiral groove 23 and returns to the vertical groove, ready for the next cycle.

[0028] The two key actions of pressure application and station switching are perfectly integrated into a single extension-retraction cycle of a hydraulic cylinder, eliminating the need for additional drive motors or cylinders to control rotation. This simplifies the control system and achieves highly efficient fully automatic operation. During the crucial pressure detection phase, the transmission rod 24 moves within the vertical groove, and the mechanism is disengaged, ensuring no relative movement tendency between the pressure frame and the disc 41. This fundamentally eliminates minor vibrations or lateral forces generated during pressure application due to the linkage of drive components, greatly ensuring the accuracy and reliability of load-bearing data acquisition. The station switching angle is guaranteed by the machining precision of the spiral groove 23 on the fixed cylinder 22. The rotation angle for each position change is constant and accurate, with high repeatability, avoiding the error accumulation problems that may occur with sensor or program control, ensuring that each detection station stops accurately directly below the hydraulic cylinder.

[0029] In this embodiment of the invention, the first transmission component is a key power transmission hub connecting the fixed cylinder 22 and the central column 13 of the telescopic mechanism 2. It accurately and stably transmits the rotational motion of the fixed cylinder 22 to the disk 41 assembly. Its core is a spatial intersecting shaft gear pair. The first transmission component includes a third gear shaft 26 and a first bevel gear 3. The third gear shaft 26 is fixed to the fixed cylinder 22, and the axis of the third gear shaft 26 is completely coincident with the axis of the fixed cylinder 22. The two are connected by a circular column 25 to form a synchronously rotating integrated component. The other end of the third gear shaft 26 is machined with a gear structure, which serves as the input end of the entire transmission chain. The first bevel gear 3 is fixed to the central column 13. The third gear shaft 26 and the first bevel gear 3 mesh perpendicularly. The rotation of the first bevel gear 3 will directly drive the central column 13 and the entire disk 41 assembly to rotate.

[0030] When the hydraulic telescopic rod 21 retracts and moves upward, it drives the end of the transmission rod 24 to move in the spiral groove 23, thus driving the fixed cylinder 22 to start rotating. This rotational power is directly transmitted to the third gear shaft 26 fixed to it. The gear at the end of the rotating third gear shaft 26 drives the first bevel gear 3, which meshes perpendicularly with it, to rotate. Because of the perpendicular meshing, the gear pair completes the degree space conversion of the power transmission plane from one horizontal axis to another. Although the input shaft and the output shaft are both horizontal axes, they are usually located on different sides or at different heights of the equipment. The bevel gear pair is one of the most compact and efficient ways to achieve this power transmission between non-parallel shafts. The rotation of the first bevel gear 3 directly drives the central column 13 fixed to it to rotate synchronously. The central column 13 then drives the discs 41 fixed at both ends and all the force detection mechanisms 6 mounted on the discs 41 to rotate together, realizing the precise switching between the detection station and the unloading station. During the detection phase when the hydraulic rod is moving downward, the transmission rod 24 slides in the vertical groove, and the fixed cylinder 22 does not rotate. At this time, the transmission chain consisting of the third gear shaft 26 and the first bevel gear 3 is in a static load holding state. However, due to the self-locking property of gear meshing (especially spiral bevel gears) or system inertia, the disk 41 can be reliably kept in a fixed position and can withstand the small vibrations or recoil forces that may be generated during testing.

[0031] The telescopic mechanism 2 (located at the top or middle of the equipment) and the limiting mechanism 4 (disc 41 assembly) are not on the same axial plane. Using a pair of vertically meshing bevel gears, the power span direction can be transmitted most efficiently to the central column 13 on the other side within a limited space, avoiding the extra space required by using lengthy parallel shaft systems, chains, or belt drives, making the equipment structure more compact and integrated. Gear drives, especially rigidly mounted bevel gear drives, have the advantages of no slippage and a constant transmission ratio. This ensures a strict proportional relationship (typically :) between the rotation angle of the disc 41 and the rotation angle of the fixed cylinder 22 (determined by the helical groove 23), guaranteeing extremely high positioning accuracy and excellent repeatability for each repositioning. Its rigid connection can also withstand the impacts and vibrations transmitted through the frame during testing. Since there are two fixed cylinders 22, each connected to both ends of the central column 13 via an identical third gear shaft 26 and first bevel gear 3, this constitutes a structure with synchronous drive at both ends. This ensures that the central column 13 is subjected to balanced force and rotates synchronously at both ends, avoiding the torsion or asynchronous problems that may occur with single-point drive, making the huge disk 41 assembly run more smoothly and reliably, and reducing the wear and tear of the bearings.

[0032] like Figure 6 and Figure 9 As shown, the force detection mechanism 6 also includes a torsion spring column 61. The torsion spring column 61 is a core energy storage and reset element in the force detection mechanism 6, combining mechanical energy storage with gear transmission. The torsion spring column 61 includes a column body and a torsion spring sleeved on it. The column body is a short shaft or column that is vertically fixed on the bottom wall of the mounting position 42. Its installation must be absolutely stable and can be fastened with bolts or welded. It serves as the static reference for the entire torsion spring column 61. One end of the torsion spring is fixed to the column body, and the bottom of the column body is fixed to the bottom wall of the mounting position 42. The first gear shaft 65 is movably inserted into the upper end of the column body. The end of the torsion spring away from the column body is fixed to the first gear shaft 65. One end of the torsion spring is rigidly fixed to the column body through drilling, slotting, or pins. This end is the fixed reference point for the entire torsional motion. The first gear shaft 65 is a composite shaft, and its lower end is movably inserted into the upper end hole or bearing of the column body, forming a support connection that can rotate freely relative to the column body. The first gear shaft 65 has only rotational freedom with respect to the cylinder, without a fixed circumferential connection. Their rotational relationship is entirely determined and controlled by the torsional state of the torsion spring.

[0033] When the force detection mechanism 6 is in the detection position, the two half-wheels 612 should be in a closed state to clamp the reinforcing bar 7. At this time, the first gear shaft 65 is in a specific initial angle position, and the torsion spring is pre-twisted by an angle (i.e., has a preload torque). This preload force, through the first gear shaft 65 and the subsequent transmission system, continuously applies a force to keep the two half-wheels 612 closed, ensuring that the reinforcing bar 7 is reliably clamped before and during detection and will not loosen due to vibration or gravity. When the detection mechanism rotates to the unloading position, the half-wheels 612 need to be opened to release the reinforcing bar 7. This action is initiated by an external triggering mechanism. The external triggering force drives the first gear shaft 65 to rotate in the opposite direction to the preload direction of the torsion spring. This causes the torsion spring to be further twisted, increasing the stored energy. The rotation of the first gear shaft 65, through the gears on it, drives the moving assembly, causing the two half-wheels 612 to overcome friction and other resistance, move away from each other, and open. When the external triggering force is removed, the elastic potential energy stored in the extra-twisted torsion spring immediately begins to be released. The torsion spring drives the first gear shaft 65 to rotate in the opposite direction, returning it to its initial angular position. The reset rotation of the first gear shaft 65, through gear transmission, drives the moving component to move, causing the two half-wheels 612 to move closer to each other again, returning to the closed state, preparing for the next cycle of feeding and clamping.

[0034] The torsion spring column 61 provides a reliable automatic reset function. It ensures that after unloading, the half-wheel 612 automatically and quickly returns to its closed standby state without the need for an additional power source (such as a cylinder or motor). This greatly simplifies the local control system of each inspection station, reducing cost and complexity. The preload of the torsion spring provides the closing torque, ensuring that the initial clamping force remains essentially constant for each clamping action, unaffected by air pressure fluctuations or power instability, thus improving clamping reliability and consistency. Integrating the energy storage element (torsion spring) and the power output shaft (gear shaft) into a compact columnar unit, directly fixed to the bottom wall of mounting position 42, maximizes space savings, resulting in a very compact and efficient structure. The energy storage and release process of the torsion spring is almost instantaneous, ensuring a rapid response in the opening and closing action of the half-wheel 612. Simultaneously, the spring force is gradual, making the start and end of the opening and closing action smooth and gentle, reducing mechanical shock and noise, and contributing to improved equipment lifespan.

[0035] The core function of the moving component is to precisely convert the rotational motion of the first gear shaft 65 into the synchronous, opposite linear motion of the two vertical plates 610, thereby driving the opening and closing of the half-wheel 612. The moving component includes: a deflection plate 63, two connecting rods 64 hinged to both ends of the deflection plate 63, and vertical plates 610 perpendicularly hinged to the connecting rods 64. The first gear shaft 65 is fixedly connected to the deflection plate 63, which is a rigid plate whose center position is fixedly mounted on the first gear shaft 65. Therefore, the deflection plate 63 will rotate synchronously with the first gear shaft 65, and its plane is usually designed to be perpendicular to the axis. The deflection plate 63 has hinge holes at both ends (away from the center) for connecting drive rods. A slide 611 is fixed on the mounting position 42. Two vertical plates 610 are perpendicular to and slidably fitted with the slide 611. The deflection plate 63 is connected to a moving component that drives its reciprocating swing. There are two connecting rods 64, each hinged to one end of the deflection plate 63 via a ball joint or pin. The hinge allows the connecting rods 64 to rotate freely relative to the deflection plate 63 as it swings, converting the swing into a pull / push force. The other end of the connecting rod 64 is also hinged to the vertical plate 610. The slide 611 is a rigid guide seat fixed to the bottom wall or bracket of the mounting position 42. It has two high-precision linear guide rails or grooves machined inside, their direction parallel to the line connecting the two half-wheels 612 (i.e., horizontal). The two vertical plates 610 are perpendicular to and slidably fitted with the grooves of the slide 611 via sliders or flanges on their sides. This ensures that the vertical plates 610 can only move closer to or further away from each other along a preset straight trajectory, with precise movement without jamming or deviation.

[0036] Working process: Under the preload torque of the torsion spring, the first gear shaft 65 and the deflection plate 63 fixed thereto are held in an initial angular position (e.g., the deflection plate 63 is parallel to the line connecting the two half-wheels 612). At this time, through the transmission of the connecting rod 64, the two vertical plates 610 are pulled to the closest position to each other in the slide 611, thereby closing the two half-wheels 612 fixed on the vertical plates 610 and putting them in a clamping and ready state. When the detection mechanism rotates with the disc 41 to the bottom unloading position, the moving part fixed on the deflection plate 63 comes into contact with the inclined protrusion fixed on the frame. With the continued slight rotation of the disc 41 or the active action of the protrusion, the moving part is pushed. This external force forces the deflection plate 63 to swing around the axis of the first gear shaft 65 by an angle (e.g., from a parallel position to a position perpendicular to the line connecting the half-wheels 612). The swing of the deflection plate 63 is converted into a pushing / pulling force on the two vertical plates 610 through the hinged connecting rods at both ends. Due to the forced guidance of the slide 611, this force drives the two vertical plates 610 to slide synchronously and in opposite directions along the slide rail, moving away from each other. The movement of the vertical plates 610 directly causes the two half-wheels 612 on them to separate and open, and the steel bar 7 loses its lateral restraint and falls under the action of gravity. During this process, the rotation direction of the first gear shaft 65 is opposite to the pre-tightening direction of the torsion spring, causing the torsion spring to be tightened and store more energy. As the detection mechanism continues to rotate and leaves the unloading station, driven by the elastic restoring force stored in the tightened torsion spring, the first gear shaft 65 rotates in the opposite direction, causing the deflection plate 63 to swing back to its initial angular position. The swing back of the deflection plate 63, through the connecting rod 64, pulls the two vertical plates 610 to slide synchronously and in opposite directions along the slide rail in the slide 611, bringing them closer to each other again until they return to the initial closed position, preparing for the next loading clamping.

[0037] The high-precision sliding engagement between the slide 611 and the vertical plate 610 strictly constrains the opening and closing trajectory of the half-wheels 612, ensuring that the two half-wheels 612 always maintain centered movement with high concentricity, thus avoiding problems such as jamming, wear, or unstable clamping caused by deviations in the movement trajectory. The use of linear bearings or hardened steel rails ensures long-term accuracy and smoothness.

[0038] Optionally, the moving part includes a second gear shaft 66, and the bracket includes two side plates 613 symmetrically fixed at the mounting position 42. The first gear shaft 65 is perpendicularly meshed with the second gear shaft 66. One end of the second gear shaft 66 is rotatably connected to the side plate 613. The lower end of the side plate 613 is fixed to the slide 611. One end of the half wheel 612 passes through the side plate 613 and is rotatably connected to the vertical plate 610. The second gear shaft 66 is connected to the through rod 68 via a transmission belt 67. Both ends of the through rod 68 are rotatably connected to the mounting position 42, and both ends pass through the vertical plate 610 and the side plate 613 in sequence. A pressure wheel 69 is fixedly sleeved on the through rod 68.

[0039] When the first gear shaft 65 rotates due to the action of the torsion spring or external triggering, power is transmitted to the second gear shaft 66 through the first-stage bevel gear pair, completing the directional conversion from vertical to horizontal. The rotation of the second gear shaft 66 is further transmitted to the through rod 68 via the transmission belt 67. The belt drive serves to increase the transmission distance, buffer minor vibrations, and provide overload protection. The rotation of the through rod 68 directly drives the pressure wheel 69, which is integrally fixed on it, to rotate synchronously. Therefore, regardless of the position of the detection mechanism (detection position or unloading position), the pressure wheel 69 is always in a standby state where it can rotate freely. At the top detection position, the reinforcing bar 7 is placed between the closed half-wheel 612 and the pressure wheel 69 below. When the upper telescopic mechanism 2 presses down on the reinforcing bar 7, the pressure is transmitted to the pressure wheel 69 through the reinforcing bar 7. This downward force attempts to cause the pressure wheel 69 and its shaft (through rod 68) to flexurally deform. However, since both ends of the through rod 68 are firmly supported on the mounting position 42, and the entire mechanism is surrounded by a rigid frame formed by the side plates 613 and the slide 611, the pressure is effectively and directly transmitted to the mounting position 42 and the entire disc 41 structure, and ultimately dissipated through the frame. The vertical plate 610 can slide freely on the through rod 68, while the through rod 68 itself can rotate freely. This achieves the decoupling of two key movements: the opening and closing movement (linear) of the half-wheel 612, driven by the moving component to the vertical plate 610, is unaffected by the rotation of the through rod 68; the rotational movement of the pressure wheel 69 is driven by the rotation of the through rod 68 and is unaffected by the sliding position of the vertical plate 610. Both work independently without interference, ensuring the purity and reliability of the function.

[0040] like Figure 10 As shown, the limiting mechanism 4 and the force detection mechanism 6 are connected through the second transmission mechanism 5. The second transmission mechanism 5 includes: a fourth gear shaft 51 and a second bevel gear 62. The fourth gear shaft 51 is movably inserted into the disc 41, and the second bevel gear 62 is fixedly sleeved on the outer wall of the column. The fourth gear shaft 51 and the second bevel gear 62 mesh perpendicularly.

[0041] The core function of the second transmission mechanism 5 is to convert the rotational motion (revolution) of the disc 41 into the rotational motion (rotation input) that drives the internal action of the force detection mechanism 6. Its working principle is synchronized with the main cycle of the equipment: the power source is the rotation of the disc 41. When the telescopic mechanism 2 drives the central column 13 and the disc 41 to rotate through the first transmission component, all the fourth gear shafts 51 inserted on the disc 41 rotate around the central column 13 along with the disc 41. The second bevel gear 62, which continuously meshes perpendicularly with the fourth gear shaft 51, is fixed and does not rotate (relative to the bottom wall of its mounting position 42). When the fourth gear shaft 51 revolves with the disc 41, the geometry of the gear pair forces the fourth gear shaft 51 to rotate around its own axis because its lower gear meshes with the fixed second bevel gear 62. While the fourth gear shaft 51 revolves around the central column 13, it also rotates due to its meshing with the fixed second bevel gear 62. The rotational speed and direction of the fourth gear shaft 51 are determined by the revolution speed of the disk 41 and the gear ratio of the two bevel gears. Typically, it is designed so that for every revolution of the disk 41 (60° revolution), the fourth gear shaft 51 rotates by a specific angle, such as 60° or 100°, to match the required driving cycle. The rotational motion of the fourth gear shaft 51 is transmitted through its upper output section.

[0042] like Figure 7 As shown, the limiting mechanism 4 also includes: a hollow disc 43, a first arc toothed plate 44 and a second arc toothed plate 45, a gear column 52 fixedly connected to the fourth gear shaft 51, the hollow disc 43 being movably sleeved on the central column 13 and coaxially arranged with the disc 41, the first arc toothed plate 44 being fixedly connected to the outer wall of the hollow disc 43, the second arc toothed plate 45 being provided on the outer side of the hollow disc 43, the second arc toothed plate 45 being fixedly connected to the bottom bracket 10, the bottom bracket 10 being fixedly connected to the bottom of the mounting frame 1, the hollow disc 43 being fixed to the bottom bracket 10, and the gear column 52 being able to mesh with the first arc toothed plate 44 or the second arc toothed plate 45.

[0043] Phase 1: Inspection Station. The gear column 52 meshes with the second arc-tooth plate 45 (stationary state). When a force-bearing detection mechanism 6 rotates with the disc 41 to the top inspection station, the gear column 52 at the lower end of its corresponding fourth gear shaft 51, driven by the rotation of the disc 41, enters and meshes with the fixed second arc-tooth plate 45. Since the second arc-tooth plate 45 is fixed, the result of the gear column 52 meshing with it is that the gear column 52 is locked and cannot rotate around its own axis, thus forcing the fourth gear shaft 51 to stop rotating as well. At this time, the fourth gear shaft 51 only revolves with the disc 41, without any rotational output. The second bevel gear 62 and torsion spring column 61 meshing with it are also in a static torque-holding state. The half-wheel 612 remains closed under the preload of the torsion spring, ready to clamp the reinforcing bar 7 and perform a pressure test. In this stage, the mechanism is locked to ensure absolute stability during inspection.

[0044] Phase Two: Transition Process. During this phase, gear shaft 52 disengages from the arc-shaped gear plate (neutral state). After the inspection is completed, the disc 41 begins to rotate, causing the inspection mechanism to move away from the top position. During rotation, gear shaft 52 will disengage from the second arc-shaped gear plate 45 successively, and before contacting the first arc-shaped gear plate 44, it will be in a neutral state, not meshing with any gear plate. During this brief interval, the fourth gear shaft 51 is neither constrained by the fixed rack nor driven by the movable rack, and is in a free state. Its rotation is determined by inertia or minute frictional forces, and it does not perform any effective action.

[0045] Phase Three: Unloading / Resetting Station. Gear post 52 meshes with the first arc-tooth plate 44 (driving state). When the detection mechanism rotates to the bottom unloading station, its gear post 52 meshes with the first arc-tooth plate 44 on the hollow disk 43. Under external control, the hollow disk 43 is set to maintain a fixed angular position in the unloading station area, or to rotate at a small predetermined angle. Therefore, when the gear post 52 meshes with the first arc-tooth plate 44 and continues to revolve with the disk 41, since the first arc-tooth plate 44 itself is not fixed (it has limited movement with the hollow disk 43), the meshing of the gear post 52 with it will force the gear post 52 to rotate around its own axis. The direction and angle of this rotation are jointly determined by the tooth profile of the first arc-tooth plate 44 and the controlled movement of the hollow disk 43. The fourth gear shaft 51 generates precise rotation. This rotation, through its engagement with the second bevel gear 62 (which acts as a fixed "reaction seat"), is converted into torsion of the torsion spring column 61. This torsion means the torsion spring is tightened or released, thereby driving the moving assembly via the first gear shaft 65 to precisely execute the opening or closing action of the half-wheel 612. For example, opening and releasing the reinforcing bar 7 at the unloading position, and closing and resetting before leaving the unloading position.

[0046] Phase 4: Reverse transition and reset. After completing the unloading / reset action, the disc 41 continues to rotate, the gear column 52 disengages from the first arc tooth plate 44, enters neutral again, and finally re-engages with the fixed second arc tooth plate 45 when it returns to the top inspection station, is locked, and prepares for the next cycle.

[0047] Optionally, each disc 41 has four mounting positions 42, a placement rack 8 is fixedly connected to one side of the bottom bracket 10, a placement mechanism 9 is connected to the placement rack 8, a receiving compartment 11 is fixedly connected to the other side of the bottom bracket 10, and a sloping panel 12 is provided at the lower center of the bottom bracket 10 and the sloping panel 12 is mounted on the bottom bracket 10.

[0048] like Figure 8As shown, the placement mechanism 9 includes a fixed rod 91, which is fixedly connected to the placement frame 8. A rotating column 93 passes through the inside of the fixed rod 91. A drive motor 92 is inserted into one end of the rotating column 93. A protective cover is provided on the outside of the drive motor 92. The drive motor 92 is fixedly connected to the mounting frame 1. A first connecting rod 94 is fixedly connected to the end of the rotating column 93 away from the drive motor 92. A first square block 95 is movably sleeved at one end of the first connecting rod 94. A rocker arm 96 is slidably engaged with the outer wall of the first square block 95. The lower end of the rocker arm 96 is hinged to the fixed rod 91. A concave plate 97 is fixedly connected to the top of the fixed rod 91. A movable column 911 is fixedly connected to the inner side of the concave plate 97. A T-shaped telescopic column 912 is sleeved on the outer wall of the movable column 911.

[0049] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, a right-angle plate 98 is fixedly connected to one side of the concave plate 97. A movable column 913 is rotatably connected to one end of the right-angle plate 98. A second connecting rod 99 is fixedly connected to the movable column 913. A second square block 910 is hinged to the end of the second connecting rod 99 away from the movable column 913. The second square block 910 is slidably disposed in a rectangular groove opened on the rocker arm 96. A spring column 914 passes through the interior of the movable column 913. The spring column 914 consists of a round rod and a helical spring assembly. The coil spring is movably sleeved on the round rod, with one end of the coil spring fixedly connected to the side of the round rod and the other end of the coil spring fixedly connected to the movable chamber column 913. One end of the spring column 914 is hinged to an irregular plate 915, and the bottom column of the T-shaped telescopic column 912 passes through the irregular plate 915. A support column 916 is fixedly connected to the bottom of the irregular plate 915, and a mechanical gripper 917 is fixedly connected to one end of the support column 916. The mechanical gripper 917 adopts the existing technology structure.

[0050] Optionally, the mounting position 42 is a groove formed on the outer periphery of the disc 41.

[0051] The present invention provides a method for using a structural steel reinforcement load-bearing capacity testing device, the working process of which is as follows: S1: Loading Material When performing a quality bearing capacity test on the reinforcing bar 7, the reinforcing bar 7 is placed on the placement frame 8. The drive motor 92 is used to rotate the rotating column 93, which in turn rotates the first connecting rod 94. This causes the first square block 95 and the second square block 910 connected to slide up and down inside the rocker arm 96. The lower end of the rocker arm 96 makes an arc-shaped reciprocating motion under the connection of the fixed rod 91. At the same time, the second square block 910 at the upper end drives the second connecting rod 99 and the movable chamber column 913 to rotate as it slides. This causes the spring column 914 connected inside the movable chamber column 913 to make a reciprocating motion, which drives the irregular plate 915 to make the T-shaped telescopic column 912 connected above slide back and forth on the moving column 911. This allows the supporting column 916 and the mechanical gripper 917 connected to the irregular plate 915 to clamp and place the reinforcing bar 7, thus realizing the feeding of the reinforcing bar 7. S2: Detection The hydraulic telescopic rod 21 extends and presses down, while the connected transmission rod 24 slides inside the vertical groove on the surface of the fixed cylinder 22. Then, the lower steel bar 7 is pressed down, causing the steel bar 7 to bend. At the same time, the lower pressure wheel 69 is driven to rotate, so that the pressure wheels 69 at both ends rotate relative to each other. The connected through rod 68 drives the second gear shaft 66 to rotate through the transmission belt 67. The connected first gear shaft 65 drives the deflection plate 63 to rotate clockwise, opening the connecting rods 64 at both ends to the sides. This pushes the connected vertical plate 610 to slide inside the slide chamber 611, opening the half wheel 612 connected to the upper end of the vertical plate 610 from the middle to both sides. At this time, the hydraulic telescopic rod 21 stops extending and retracts. Under the compressive stress of the steel bar 7, the pressure wheels 69 are driven to rotate in opposite directions to reset. If the steel bar 7 can reset and straighten, it means that the steel bar 7 is a qualified product. S3: Categorized Collection When the hydraulic telescopic rod 21 retracts, the transmission rod 24 slides in the spiral groove 23 on the surface of the fixed cylinder 22, causing the fixed cylinder 22 to rotate. This causes the third gear shaft 26 connected to the lower circular cylinder 25 to rotate one revolution, driving the connected first bevel gear 3 and the disc 41 to rotate 90 degrees. Then, the pressing step is repeated. When the internal gear column 52 contacts the second arc tooth plate 45, the gear column 52 rotates counterclockwise, causing the half-wheels 612 to rotate in opposite directions and open to both sides, dropping the intact steel bar 7 onto the inclined plate 12. Then, the rotation continues. At this time, the mechanical gripper 917 will move the clamped steel bar 7 to the top of the half-wheel 612 for placement. Then, the connected gear column 52 will contact the second arc tooth plate 45, causing the bottom gear column 52 to contact the first arc tooth plate 44 again and rotate clockwise under its action, driving the first bevel gear 3 to rotate counterclockwise, causing the connected two half-wheels 612 to close towards the middle, completing the pressing test. If the steel bar 7 is bent by the hydraulic telescopic rod 21 and cannot be reset, it indicates that the steel bar 7 is of unqualified quality. The bent steel bar 7 will cause the half wheel 612 to be in an open state, and then the pressing step will be repeated. When the bent steel bar 7 rotates to the receiving chamber 11, the steel bar 7 inside the half wheel 612 will fall into the receiving chamber 11 under its own weight. When the internal gear column 52 contacts the surface of the second arc tooth plate 45, the connected gear column 52 will rotate counterclockwise, causing the second arc tooth plate 45 to drive the connected first bevel gear 3 to rotate, causing the internally connected torsion spring column 61 to rotate and reset. Then the above steps are repeated to complete the pressing test of the steel bar 7 quality.

[0052] The above embodiments are merely a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for testing the load-bearing capacity of reinforcing steel bars in buildings, characterized in that, It includes a mounting frame, a telescopic mechanism connected to the mounting frame and capable of pressing down the reinforcing bar, a limiting mechanism that is connected to the telescopic mechanism via a first transmission component, and a force detection mechanism; The limiting mechanism includes: a central column rotatably connected to the mounting frame and two discs symmetrically and vertically fixed to both ends of the central column. The discs are connected to a first transmission component to make the discs rotate. The central column is perpendicular to the extension and retraction direction of the telescopic mechanism. The discs have multiple mounting positions evenly arranged along their circumference, and each mounting position is connected to a force detection mechanism. The force detection mechanism includes: a bracket fixed at the installation position, a pressure wheel rotatably connected to the bracket, two half-wheels facing the pressure wheel away from the central column, and a moving component that drives the two half-wheels to move closer or further away from each other. One end of each half-wheel is connected to the bracket, and a steel bar is placed between the pressure wheel and the half-wheels. When testing reinforcing bars, the two half-wheels are positioned above the pressure wheel and are in contact with each other. The telescopic mechanism extends and presses down on the reinforcing bars. When the telescopic mechanism resets, it drives the disc to rotate. The two half-wheels are positioned below the pressure wheel and are far apart. After the reinforcing bars are tested by the punching, they are removed from the force testing mechanism.

2. The load-bearing capacity testing equipment for reinforcing steel bars in construction as described in claim 1, characterized in that, The telescopic mechanism includes a hydraulic telescopic rod, two fixed cylinders, and a transmission rod. The hydraulic telescopic rod is fixedly connected to the mounting frame, and the transmission rod is vertically fixedly connected to the hydraulic telescopic rod. The two fixed cylinders are arranged perpendicular to both ends of the central column and are rotatably connected to the mounting frame. The surface of the fixed cylinders is provided with a spiral groove, and a vertical groove is provided between the two ends of the spiral groove. The two ends of the transmission rod are slidably connected in the vertical groove or the spiral groove. The central column and the fixed cylinders are connected through a first transmission component.

3. The load-bearing capacity testing equipment for reinforcing steel bars in construction as described in claim 2, characterized in that, The first transmission component includes a third gear shaft and a first bevel gear. The third gear shaft is fixedly connected to a fixed cylinder, and the first bevel gear is fixedly connected to a central column. The third gear shaft and the first bevel gear mesh perpendicularly.

4. The load-bearing capacity testing equipment for reinforcing steel bars as described in claim 1, characterized in that, The force detection mechanism also includes a torsion spring column, which includes a column body and a torsion spring sleeved thereon. One end of the torsion spring is fixed to the column body, the bottom of the column body is fixed to the bottom wall of the mounting position, and a first gear shaft is movably inserted into the upper end of the column body. The end of the torsion spring away from the column body is fixed to the first gear shaft.

5. The load-bearing capacity testing equipment for reinforcing steel bars in construction as described in claim 4, characterized in that, The moving component includes: a deflection plate, two connecting rods hinged to both ends of the deflection plate, and a vertical plate vertically hinged to the connecting rods. The first gear shaft is fixedly connected to the deflection plate. A slide is fixed at the mounting position. The two vertical plates are perpendicular to the slide and slide in a sliding fit. The deflection plate is connected to a moving component that drives it to reciprocate.

6. The load-bearing capacity testing equipment for reinforcing steel bars as described in claim 5, characterized in that, The moving component includes a second gear shaft, and the bracket includes two side plates symmetrically fixed at the mounting position. The first gear shaft is perpendicularly meshed with the second gear shaft. One end of the second gear shaft is rotatably connected to the side plate. The lower end of the side plate is fixed to the slide. One end of the half-wheel passes through the side plate and is rotatably connected to the vertical plate. The second gear shaft is connected to the through rod via a transmission belt. Both ends of the through rod are rotatably connected to the mounting position, and both ends pass through the vertical plate and the side plate in sequence. A pressure wheel is fixedly sleeved on the through rod.

7. The load-bearing capacity testing equipment for reinforcing steel bars as described in claim 6, characterized in that, The limiting mechanism and the force detection mechanism are connected through a second transmission mechanism, which includes a fourth gear shaft and a second bevel gear. The fourth gear shaft is movably inserted into the disc, and the second bevel gear is fixedly sleeved on the outer wall of the column. The fourth gear shaft and the second bevel gear mesh perpendicularly.

8. The load-bearing capacity testing equipment for building steel reinforcement as described in claim 7, characterized in that, The limiting mechanism further includes: a hollow disc, a first arc-tooth plate, and a second arc-tooth plate. The fourth gear shaft is fixedly connected to a gear column. The hollow disc is movably sleeved on the central column and coaxially arranged with the disc. The outer wall of the hollow disc is fixedly connected to the first arc-tooth plate. The outer side of the hollow disc is provided with a second arc-tooth plate. The second arc-tooth plate is fixedly connected to the bottom bracket. The bottom bracket is fixedly connected to the bottom of the mounting frame. The hollow disc is fixed to the bottom bracket. The gear column can mesh with the first arc-tooth plate or the second arc-tooth plate.

9. The load-bearing capacity testing equipment for building steel reinforcement as described in claim 8, characterized in that, Each of the discs has four mounting positions. A placement rack is fixed to one side of the bottom bracket, and a placement mechanism is connected to the placement rack. A receiving compartment is fixed to the other side of the bottom bracket. An inclined panel is provided at the lower center of the bottom bracket and is mounted on the bottom bracket.

10. The load-bearing capacity testing equipment for reinforcing steel bars in construction as described in claim 1, characterized in that, The mounting position is a groove formed on the outer periphery of the disk.

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