A scaffold mechanical properties test device and method

Abstract

The present invention relates to the technical field of mechanical property testing equipment, and in particular to a scaffold mechanical property testing equipment and method. A scaffold mechanical property testing equipment comprises a rotating disk, a plurality of clamping mechanisms and a plurality of loading mechanisms. Each clamping mechanism comprises a clamping assembly, and the clamping assembly is used to clamp a scaffold sample. Each loading mechanism comprises a loading hydraulic cylinder and an impact cylinder. When the rotating disk rotates, the plurality of clamping mechanisms and the plurality of loading mechanisms are driven to rotate synchronously, and each scaffold sample moves back and forth along the radial direction of the rotating disk, and the loading hydraulic cylinder can apply loads to different positions of the scaffold sample. The present invention provides a scaffold mechanical property testing equipment and method to solve the problems that the detection methods and data of the existing mechanical property testing equipment are relatively single, and it cannot simulate the actual load-bearing situation of the scaffolding assembly, and the detection results are inaccurate and the detection efficiency is low.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical property testing equipment, and in particular to a scaffold mechanical property testing equipment and method. Background Art

[0002] Mechanical properties testing equipment is an instrument and equipment used for testing the mechanical properties of materials, mainly including static tests such as tension, compression, bending, and dynamic test equipment such as fatigue and impact. Static load testing machines include universal testing machines, hydraulic universal testing machines, electronic universal testing machines, etc., which mainly conduct static mechanical properties tests such as tension, compression, bending, shearing, and torsion. Non-metallic material testing equipment is mainly used for mechanical properties testing of plastics, rubber, composite materials, etc., such as determining elastic modulus, fracture strength, compression deformation, etc.

[0003] The loads that scaffolding is subjected to during actual work can be divided into three categories: Static load: Under static load, scaffolding mainly bears conventional static loads, such as the weight of personnel and tools, etc. Its stress is relatively stable, and it mainly examines the static bearing capacity and stability of the structure. Dynamic load: Dynamic load generated when people or objects move on the scaffolding, such as load changes when workers walk on the scaffolding or operate equipment. Investigate the response ability and stability of the structure under dynamic loads. Impact load: Impact load simulates a short-term, high-intensity load suddenly applied to the scaffolding, such as unexpected situations such as falling objects that may occur on a construction site. Investigate its bearing capacity and structural stability when unforeseen impact events occur.

[0004] For example, the Chinese invention patent with the announcement number CN117804891B provides a mechanical properties test equipment for steel pipe scaffold fasteners. By setting a flow groove, a flow block, a fixed seat, a movable groove, an elastic member and a reinforcement plate, the time for the electronic universal testing machine to drive the pressure head up and down is reduced, which greatly improves the efficiency of the anti-slip test. However, the detection method and data of the mechanical properties test equipment are relatively simple, and it cannot simulate the actual load-bearing situation of the scaffolding components. The detection results are inaccurate and the detection efficiency is low. Summary of the invention

[0005] The invention provides a scaffold mechanical property test device and method to solve the problems that the existing mechanical property test device has a relatively simple detection method and data, cannot simulate the actual load-bearing condition of the scaffold component, has inaccurate detection results, and has low detection efficiency.

[0006] A scaffold mechanical properties test device and method of the present invention adopts the following technical scheme:

[0007] A scaffold mechanical property test device comprises a chassis, a rotating disk, a plurality of clamping mechanisms and a plurality of loading mechanisms. The axis of the chassis is arranged in the up-down direction, an elliptical groove is provided on the chassis, and the elliptical groove and the chassis are arranged coaxially. The rotating disk is rotatably arranged on the chassis, and the rotating disk and the chassis are arranged coaxially. The rotating disk is provided with a plurality of sliding grooves, and the plurality of sliding grooves are distributed along the circumference of the rotating disk, and each sliding groove is arranged along the radial direction of the rotating disk.

[0008] A plurality of clamping mechanisms are distributed along the circumference of the rotating disk, and each clamping mechanism includes a first mounting frame and a clamping assembly. A sliding column is fixedly arranged on each first mounting frame, and the sliding column is arranged vertically. Each sliding column is slidably arranged in a sliding groove, and the sliding column is slidably arranged in the elliptical groove. The clamping assembly is arranged on the first mounting frame, and the clamping assembly is used to clamp a scaffolding sample, and the scaffolding sample includes a vertical rod and a horizontal rod, and the vertical rod and the horizontal rod are connected by a right-angle fastener. The vertical rod is arranged vertically, and the horizontal rod is arranged along the radial direction of the rotating disk.

[0009] Multiple loading mechanisms are distributed along the circumference of the rotating disk, and each loading mechanism includes a second mounting frame, a loading hydraulic cylinder and an impact cylinder. The second mounting frame is fixedly arranged on the rotating disk, and the loading hydraulic cylinder and the impact cylinder are both vertically arranged. The upper ends of the loading hydraulic cylinder and the impact cylinder are both fixedly arranged on the second mounting frame. The loading hydraulic cylinder is used to continuously apply load to the cross bar, and the impact cylinder intermittently impacts the cross bar.

[0010] Furthermore, each loading mechanism further comprises an articulated pressure block, which comprises a connection shell, a pressure belt and a plurality of rotating rollers. The connection shell is arranged at the lower end of the loading hydraulic cylinder, the connection shell is triangular, a rotating shaft is fixedly arranged at the upper end of the connection shell, the rotating shaft is arranged along the tangent direction of the cross bar, and the rotating shaft is rotatably connected to the lower end of the loading hydraulic cylinder. The rotating roller is arranged on the connection shell, the rotating roller is arranged along the tangent direction of the cross bar, and the plurality of rotating rollers are distributed along the circumference of the connection shell.

[0011] The pressure belt is sleeved on the outside of multiple rotating rollers, and the pressure belt includes an inner support belt and an outer deformation belt. The inner support belt and the outer deformation belt are fixedly arranged, and the inner support belt and the outer deformation belt are distributed in sequence from the inside to the outside. A liquid cavity is arranged between the inner support belt and the outer deformation belt, and hydraulic oil is arranged in the liquid cavity. The outer deformation belt can be deformed, and the outer deformation belt and the peripheral wall of the cross bar are against each other.

[0012] Furthermore, an impact hammer is fixedly arranged at the lower end of the impact cylinder.

[0013] Furthermore, a limiting ring is fixedly arranged on each first mounting frame, and a triangular chuck is fixedly arranged on each first mounting frame. The upper end of the vertical rod is arranged in the limiting ring, and the triangular chuck clamps the lower end of the vertical rod.

[0014] Further, the rotating plate includes an upper plate, a lower plate and a connecting rod, the upper plate and the lower plate are sequentially distributed along the up and down direction, and the connecting rod connects the upper plate and the lower plate. The sliding groove is arranged on the lower plate, and the second mounting frame is fixedly arranged on the upper plate.

[0015] Further, a connecting pipe is fixedly arranged on the lower side of the lower plate, and the connecting pipe and the lower plate are coaxially arranged. A rotating shaft is fixedly arranged on the upper side of the chassis, and the rotating shaft and the chassis are coaxially arranged. The connecting pipe is rotatably sleeved on the rotating shaft.

[0016] Furthermore, a scaffold mechanical property test device also includes a driving mechanism, the driving mechanism includes a driving motor, the driving motor is fixedly arranged on the chassis, the output shaft of the driving motor is arranged along the radial direction of the chassis, and a bevel gear is fixedly arranged on the output shaft of the driving motor. A bevel gear ring is arranged on the peripheral wall of the lower plate, and the bevel gear ring is meshed with the bevel gear.

[0017] Furthermore, the sliding column includes a square column and a rolling ring. The square column is vertically arranged. The upper end of the square column is fixedly connected to the first mounting frame. The square column is slidably arranged in the sliding groove. The rolling ring is rotatably arranged at the lower end of the square column. The rolling ring is slidably arranged in the elliptical groove.

[0018] Furthermore, a loading control box and a plurality of sensors are arranged on the rotating disk, the loading control box is used to control the load applied by the loading hydraulic cylinder to the cross bar, and control the frequency and impact load of the impact cylinder to the cross bar. Each sensor is used to sense the strain of a cross bar.

[0019] A scaffold mechanical properties test method comprises the following steps:

[0020] S1: Rotate the rotating disk, and when the rotating disk rotates, it drives multiple clamping mechanisms and multiple loading mechanisms to rotate synchronously.

[0021] S2: Each scaffolding specimen rotates around the chassis once, which is a cycle. In each cycle, each scaffolding specimen moves back and forth along the radial direction of the rotating disk, and the loading hydraulic cylinder can apply load to different positions of the crossbar.

[0022] S3: In each cycle, the loading hydraulic cylinder first applies a load to the crossbar, and then unloads the load applied to the crossbar. The period of applying the load is the loading period, and the period of unloading the load is the unloading period. By changing the size of the loading period and the speed of the rotating disk, the time for the loading hydraulic cylinder to apply the load to the crossbar can be changed.

[0023] S4: The impact cylinder applies random multiple impact loads to the crossbar during both the loading cycle and the unloading cycle, thereby obtaining different impact loads in the same cycle.

[0024] S5: In different cycles, the loads applied by the impact loading hydraulic cylinder and the impact cylinder to the crossbar can be changed, so as to obtain different load amounts and different impact loads on the crossbar in different cycles.

[0025] The beneficial effects of the present invention are as follows: the scaffolding mechanical properties testing equipment of the present invention can test different scaffolding samples by providing multiple clamping mechanisms and multiple loading mechanisms, and the testing efficiency is higher.

[0026] Each scaffolding specimen rotates one circle around the chassis as one cycle. In each cycle, since each scaffolding specimen moves back and forth along the radial direction of the rotating disk, the loading hydraulic cylinder and the crossbar continuously move relative to each other, so the loading hydraulic cylinder can apply load to different positions of the crossbar.

[0027] In each cycle, the loading hydraulic cylinder first applies load to the crossbar, and then unloads the load applied to the crossbar. The period of applying load is the loading period, and the period of unloading load is the unloading period. By changing the size of the loading period and the speed of the rotating disk, the time for the loading hydraulic cylinder to apply load to the crossbar can be changed.

[0028] In each cycle, the impact cylinder applies random multiple impact loads to the crossbar during the loading cycle and the unloading cycle, so that different impact loads are obtained in the same cycle.

[0029] In different cycles, the loads applied by the impact loading hydraulic cylinder and the impact air cylinder to the crossbar can be changed, so as to obtain different load amounts and different impact loads received by the crossbar in different cycles.

[0030] After the experiment was completed, each scaffolding specimen experienced different load amounts, different impact loads and different loading times at different loading positions, making the inspection of the scaffolding specimens more comprehensive, the inspection method simple and easy to operate, and the inspection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A structural schematic diagram of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0033] Figure 2A top view of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0034] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0035] Figure 4 An exploded diagram of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0036] Figure 5 A schematic structural diagram of a clamping mechanism and a scaffolding sample of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0037] Figure 6 A partial structural schematic diagram of a loading mechanism of a scaffold mechanical properties testing device provided by an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the cooperation between a clamping mechanism and a loading mechanism of a scaffold mechanical properties testing device provided by an embodiment of the present invention;

[0039] Figure 8 A structural schematic diagram of an articulated pressing block of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0040] Fig. 9 A cross-sectional view of an articulated pressing block of a scaffolding mechanical properties testing device provided by an embodiment of the present invention;

[0041] Fig.10 A cross-sectional view from another perspective of an articulated pressing block of a scaffold mechanical properties testing device provided by an embodiment of the present invention.

[0042] In the figure: 100, chassis; 110, drive motor; 111, bevel gear; 120, rotating shaft; 130, elliptical groove; 200, rotating plate; 210, lower plate; 211, bevel gear ring; 212, sliding groove; 220, upper plate; 221, second mounting frame; 222, hollow groove; 300, scaffolding sample; 310, first mounting frame; 311, square column; 312, rolling ring; 313, sliding column; 3 14. Limiting ring; 320. Triangular chuck; 330. Right-angle fastener; 340. Cross bar; 350. Vertical bar; 410. Loading hydraulic cylinder; 411. Articulated pressure block; 4111. Rotating shaft; 412. Rotating roller; 413. Pressing belt; 4131. Inner supporting belt; 4132. Outer deformation belt; 4133. Liquid chamber; 414. Connecting shell; 420. Impact cylinder; 421. Impact hammer; 500. Loading control box. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Reference Figures 1 to 10 As shown, a scaffold mechanical property test device provided by an embodiment of the present invention includes a chassis 100, a rotating disk 200, a plurality of clamping mechanisms and a plurality of loading mechanisms. The axis of the chassis 100 is arranged in the up-down direction, and an elliptical groove 130 is provided on the chassis 100, and the elliptical groove 130 and the chassis 100 are arranged coaxially. The rotating disk 200 is rotatably arranged on the chassis 100, and the rotating disk 200 and the chassis 100 are arranged coaxially. The rotating disk 200 is provided with a plurality of sliding grooves 212, and the plurality of sliding grooves 212 are distributed along the circumference of the rotating disk 200, and each sliding groove 212 is arranged along the radial direction of the rotating disk 200.

[0045] A plurality of clamping mechanisms are distributed along the circumference of the rotating disk 200, and each clamping mechanism includes a first mounting frame 310 and a clamping assembly. A sliding column 313 is fixedly arranged on each first mounting frame 310, and the sliding column 313 is arranged vertically. Each sliding column 313 is slidably arranged in a sliding groove 212, and the sliding column 313 is slidably arranged in the elliptical groove 130. The clamping assembly is arranged on the first mounting frame 310, and the clamping assembly is used to clamp a scaffolding sample 300. The scaffolding sample 300 includes a vertical rod 350 and a horizontal rod 340, and the vertical rod 350 and the horizontal rod 340 are connected by a right-angle fastener 330. The vertical rod 350 is arranged vertically, and the horizontal rod 340 is arranged along the radial direction of the rotating disk 200.

[0046] Multiple loading mechanisms are distributed along the circumference of the rotating disk 200, and each loading mechanism includes a second mounting frame 221, a loading hydraulic cylinder 410 and an impact cylinder 420. The second mounting frame 221 is fixedly set on the rotating disk 200, and the loading hydraulic cylinder 410 and the impact cylinder 420 are both vertically set. The upper ends of the loading hydraulic cylinder 410 and the impact cylinder 420 are both fixedly set on the second mounting frame 221. The loading hydraulic cylinder 410 is used to continuously apply a load to the cross bar 340, and the impact cylinder 420 intermittently impacts the cross bar 340.

[0047] The rotating disk 200 is rotated, and when the rotating disk 200 rotates, the multiple clamping mechanisms and the multiple loading mechanisms are driven to rotate synchronously. Since the sliding post 313 on the first mounting frame 310 is slidably arranged in the sliding groove 212 and the elliptical groove 130. When the rotating disk 200 drives the first mounting frame 310 to revolve, the first mounting frame 310 slides in the sliding groove 212. Whenever the rotating disk 200 rotates one circle and the sliding post 313 rotates one circle in the elliptical groove 130, the sliding post 313 moves back and forth in the sliding groove 212, gradually approaches the axis of the rotating disk 200 and then gradually moves away from the axis of the rotating disk 200, or gradually moves away from the axis of the rotating disk 200 and then gradually approaches the axis of the rotating disk 200, and finally returns to the initial position.

[0048] One cycle is one rotation of each scaffolding sample 300 around the base plate 100. In each cycle, since each scaffolding sample 300 moves back and forth along the radial direction of the rotating disk 200, the loading hydraulic cylinder 410 and the cross bar 340 continuously move relative to each other, so the loading hydraulic cylinder 410 can apply load to different positions of the cross bar 340.

[0049] In each cycle, the loading hydraulic cylinder 410 first applies a load to the crossbar 340, and then unloads the load applied to the crossbar 340. The period of applying the load is the loading period, and the period of unloading the load is the unloading period. The time for the loading hydraulic cylinder 410 to apply the load to the crossbar 340 can be changed by changing the size of the loading period and the rotation speed of the rotating disk 200.

[0050] In each cycle, the impact cylinder 420 applies random multiple impact loads to the crossbar 340 in both the loading cycle and the unloading cycle, thereby obtaining different impact loads in the same cycle.

[0051] In different cycles, the loads applied to the crossbar 340 by the impact loading hydraulic cylinder 410 and the impact air cylinder 420 may be changed, thereby obtaining different load amounts and impact loads received by the crossbar 340 in different cycles.

[0052] After the experiment is completed, each scaffolding sample 300 has experienced different load amounts, different impact loads and different loading times at different loading positions, thereby making the detection of the scaffolding sample 300 more comprehensive and more accurate.

[0053] In this embodiment, each loading mechanism further includes an articulated pressing block 411, which includes a connecting shell 414, a pressing belt 413, and a plurality of rotating rollers 412. The connecting shell 414 is disposed at the lower end of the loading hydraulic cylinder 410, and the connecting shell 414 is triangular in shape. A rotating shaft 4111 is fixedly disposed at the upper end of the connecting shell 414, and the rotating shaft 4111 is disposed along the tangent direction of the cross bar 340, and the rotating shaft 4111 is rotatably connected to the lower end of the loading hydraulic cylinder 410. The rotating roller 412 is disposed on the connecting shell 414, and the rotating roller 412 is disposed along the tangent direction of the cross bar 340, and a plurality of rotating rollers 412 are distributed along the circumference of the connecting shell 414.

[0054] The pressure belt 413 is sleeved on the outer side of multiple rotating rollers 412, and the pressure belt 413 includes an inner support belt 4131 and an outer deformation belt 4132. The inner support belt 4131 and the outer deformation belt 4132 are fixedly arranged, and the inner support belt 4131 and the outer deformation belt 4132 are distributed in sequence from the inside to the outside. A liquid cavity 4133 is arranged between the inner support belt 4131 and the outer deformation belt 4132, and hydraulic oil is arranged in the liquid cavity 4133. The outer deformation belt 4132 can be deformed, and the outer deformation belt 4132 and the peripheral wall of the cross bar 340 are abutted, and the pressure belt 413 has a certain width.

[0055] During operation, the outer peripheral wall of the pressing belt 413 and the cross bar 340 abut against each other. Since the pressing belt 413 has a certain width, the force-bearing area of ​​the cross bar 340 is larger, and it is no longer a point contact. The detection result is more representative and the detection effect is better.

[0056] Since hydraulic oil is arranged in the liquid cavity 4133, the outer deformation band 4132 can be deformed so that the outer deformation band 4132 can wrap the outer peripheral wall of the cross bar 340, so that the force on the cross bar 340 is more even, and it is prevented that impurities are adhered to the outer peripheral wall of the cross bar 340, and the impurities form bulges on the outer side of the cross bar 340. When the pressure belt 413 squeezes the cross bar 340, the local force on the cross bar 340 is greater.

[0057] After the cross bar 340 is squeezed by the loading hydraulic cylinder 410 and impacted by the impact cylinder 420, the cross bar 340 will bend after being deformed by the force, and the hinged pressure block 411 and the loading hydraulic cylinder 410 are rotationally connected, so that after the cross bar 340 is bent, the pressure belt 413 can still be set parallel to the cross bar 340, and still be in surface contact, thereby preventing the cross bar 340 from having point contact with the pressure belt 413 after bending.

[0058] In this embodiment, an impact hammer 421 is fixedly disposed at the lower end of the impact cylinder 420 .

[0059] In this embodiment, a limiting ring 314 is fixedly disposed on each first mounting frame 310, and a triangular chuck 320 is fixedly disposed on each first mounting frame 310. The upper end of the vertical rod 350 is disposed in the limiting ring 314, and the triangular chuck 320 clamps the lower end of the vertical rod 350. The limiting ring 314 and the triangular chuck 320 are used to limit the vertical rod 350.

[0060] In this embodiment, the rotating disk 200 includes an upper disk 220, a lower disk 210 and a connecting rod, the upper disk 220 and the lower disk 210 are sequentially distributed along the up-down direction, the upper disk 220, the lower disk 210 and the bottom disk 100 are coaxially arranged, and the connecting rod connects the upper disk 220 and the lower disk 210. The sliding groove 212 is arranged on the lower disk 210, the second mounting frame 221 is fixedly arranged on the upper disk 220, and a plurality of hollow grooves 222 are opened on the upper disk 220, and the hollow grooves 222 are distributed along the circumference of the upper disk 220, and the extended ends of the loading hydraulic cylinder 410 and the impact cylinder 420 on each second mounting frame 221 are arranged in a hollow groove 222 to slide up and down.

[0061] In this embodiment, a connecting pipe is fixedly provided on the lower side of the lower plate 210, and the connecting pipe and the lower plate 210 are coaxially arranged. A rotating shaft 120 is fixedly provided on the upper side of the chassis 100, and the rotating shaft 120 and the chassis 100 are coaxially arranged. The connecting pipe is rotatably sleeved on the rotating shaft 120, so that the rotating plate 200 and the chassis 100 can rotate relative to each other.

[0062] In this embodiment, a scaffold mechanical properties test device further includes a driving mechanism, which includes a driving motor 110, the driving motor 110 is fixedly arranged on the chassis 100, the output shaft of the driving motor 110 is arranged along the radial direction of the chassis 100, and a bevel gear 111 is fixedly arranged on the output shaft of the driving motor 110. A bevel gear ring 211 is arranged on the peripheral wall of the lower plate 210, and the bevel gear ring 211 is meshed with the bevel gear 111. When the driving motor 110 is started, the driving motor 110 drives the bevel gear 111 to rotate, and then drives the lower plate 210 to rotate through the bevel gear ring 211.

[0063] In this embodiment, the sliding column 313 includes a square column 311 and a rolling ring 312. The square column 311 is vertically arranged, and the upper end of the square column 311 is fixedly connected to the first mounting frame 310. The square column 311 is slidably arranged in the sliding groove 212. The square column 311 and the sliding groove 212 cooperate to prevent the sliding column 313 from driving the first mounting frame 310 to rotate around the axis of the sliding column 313. The rolling ring 312 is rollingly arranged at the lower end of the square column 311, and the rolling ring 312 is slidably arranged in the elliptical groove 130, thereby reducing the friction between the sliding column 313 and the elliptical groove 130.

[0064] In this embodiment, a loading control box 500 and a plurality of sensors are provided on the rotating disk 200. The loading control box 500 is used to control the load applied by the loading hydraulic cylinder 410 to the cross bar 340, and to control the frequency and impact load of the impact cylinder 420 on the cross bar 340. Each sensor is used to sense the strain of one cross bar 340.

[0065] A scaffold mechanical properties test method comprises the following steps:

[0066] S1: Start the driving motor 110. The driving motor 110 drives the rotating disk 200 to rotate through the bevel gear 111 and the bevel gear ring 211. When the rotating disk 200 rotates, it drives multiple clamping mechanisms and multiple loading mechanisms to rotate synchronously. Since the sliding post 313 on the first mounting frame 310 is slidably arranged in the sliding groove 212 and the elliptical groove 130. When the rotating disk 200 drives the first mounting frame 310 to revolve, the first mounting frame 310 slides in the sliding groove 212. Whenever the rotating disk 200 rotates one circle and the sliding post 313 rotates one circle in the elliptical groove 130, the sliding post 313 moves back and forth in the sliding groove 212, gradually approaches the axis of the rotating disk 200 and then gradually moves away from the axis of the rotating disk 200, or gradually moves away from the axis of the rotating disk 200 and then gradually approaches the axis of the rotating disk 200, and finally returns to the initial position.

[0067] First, each scaffolding sample 300 is rotated around the chassis 100 for one circle, which is a cycle. Due to the multiple clamping mechanisms and multiple loading mechanisms, the scaffolding mechanical properties testing equipment can test different scaffolding samples 300.

[0068] S2: Secondly, in each cycle, the outer peripheral wall of the hinged pressing block 411 and the crossbar 340 abut against each other. Since the first mounting frame 310 drives the scaffolding sample 300 to move back and forth along the radial direction of the rotating disk 200, the hinged pressing block 411 and the crossbar 340 continuously move relative to each other, so the loading hydraulic cylinder 410 can apply loads to different positions of the crossbar 340, which simulates the dynamic load of the scaffolding sample 300 at different distances from the right-angle fastener 330. That is, the scaffolding mechanical properties test equipment can detect different loading positions.

[0069] When simulating a static load, the drive motor 110 may be controlled not to rotate, and the loading hydraulic cylinder 410 and the impact cylinder 420 may apply a load to the crossbar 340 , or data at a certain moment in the dynamic load may be captured, which is the data of the static load.

[0070] S3: Furthermore, in each cycle, the loading hydraulic cylinder 410 first applies a load to the crossbar 340, and then unloads the load applied to the crossbar 340. The cycle of applying the load is the loading cycle T1, and the cycle of unloading the load is the unloading cycle T2. For example, 12 scaffolding samples 300 are preset, and each scaffolding sample 300 has a loading cycle of 330° and an unloading cycle of 30°, that is, T1=330°, T2=30°.

[0071] When the angles of the loading cycle T1 and the unloading cycle T2 remain unchanged, the loading time of the loading hydraulic cylinder 410 applying the load to the crossbar 340 is changed by changing the rotation speed of the driving motor 110. The greater the rotation speed, the shorter the loading time. The smaller the rotation speed, the longer the loading time. When the rotation speed of the driving motor 110 remains unchanged, the loading time is changed by changing the angles of the loading cycle T1 and the unloading cycle T2. The larger the angle of T1, the longer the loading time.

[0072] S4: Then, in each cycle, the impact cylinder 420 randomly applies multiple impact loads to the cross bar 340 in the loading cycle T1 and the unloading cycle T2, so that different impact loads are obtained in the same cycle. When the impact load is applied in the loading cycle T1, it is a loaded impact, and when the impact load is applied in the unloading cycle T2, it is a no-load impact.

[0073] S5: Finally, in different cycles, the load applied by the impact cylinder 420 to the crossbar 340 can be changed, so as to obtain different loaded impacts and unloaded impacts on the crossbar 340. In different cycles, the load applied by the loading hydraulic cylinder 410 to the crossbar 340 can be changed, so as to obtain different load amounts on the crossbar 340.

[0074] During the experiment, the sensor senses the strain of the crossbar 340 and records the strain, stress, displacement, vibration and other data of the scaffolding sample 300. After the experiment is completed, each scaffolding sample 300 has experienced different load amounts and different impact loads at different loading positions: loaded impact and unloaded impact, and different loading times. When it is necessary to extract the stress and strain of a scaffolding sample 300 at a certain load amount at a certain loading position, it can be extracted by controlling the relevant variables in the recorded data. Because various variables are simulated during the experiment and detected and recorded in real time, the experimental data results under any variable can be extracted.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A scaffolding mechanical properties testing equipment, characterized in that: The invention comprises a chassis, a rotating disk, a plurality of clamping mechanisms and a plurality of loading mechanisms; the axis of the chassis is arranged in the up-down direction, an elliptical groove is provided on the chassis, and the elliptical groove and the chassis are arranged coaxially; the rotating disk is rotatably arranged on the chassis, and the rotating disk and the chassis are arranged coaxially; the rotating disk is provided with a plurality of sliding grooves, and the plurality of sliding grooves are distributed along the circumference of the rotating disk, and each sliding groove is arranged along the radial direction of the rotating disk; A plurality of clamping mechanisms are distributed along the circumference of the rotating disk, each clamping mechanism includes a first mounting frame and a clamping assembly, each first mounting frame is fixedly provided with a sliding column, the sliding column is vertically provided, each sliding column is slidably provided in a sliding groove, and the sliding column is slidably provided in the elliptical groove; the clamping assembly is provided on the first mounting frame, the clamping assembly is used to clamp a scaffolding sample, the scaffolding sample includes a vertical rod and a horizontal rod, the vertical rod and the horizontal rod are connected by a right-angle fastener; the vertical rod is vertically provided, and the horizontal rod is provided along the radial direction of the rotating disk; A plurality of loading mechanisms are distributed along the circumference of the rotating disk, each loading mechanism comprises a second mounting frame, a loading hydraulic cylinder and an impact cylinder, the second mounting frame is fixedly arranged on the rotating disk, the loading hydraulic cylinder and the impact cylinder are both arranged vertically, the upper ends of the loading hydraulic cylinder and the impact cylinder are both fixedly arranged on the second mounting frame, the loading hydraulic cylinder is used to continuously apply a load to the cross bar, and the impact cylinder impacts the cross bar intermittently; The rotating disk is rotated, and when the rotating disk rotates, multiple clamping mechanisms and multiple loading mechanisms are driven to rotate synchronously; each scaffolding sample rotates around the bottom plate once as one cycle, and in each cycle, each scaffolding sample moves back and forth along the radial direction of the rotating disk.

2. A scaffolding mechanical properties testing device according to claim 1, characterized in that: Each loading mechanism also includes an articulated pressure block, which includes a connecting shell, a pressure belt and a plurality of rotating rollers; the connecting shell is arranged at the lower end of the loading hydraulic cylinder, the connecting shell is triangular, a rotating shaft is fixedly arranged at the upper end of the connecting shell, the rotating shaft is arranged along the tangent direction of the cross bar, and the rotating shaft is rotatably connected to the lower end of the loading hydraulic cylinder; the rotating roller is arranged on the connecting shell, the rotating roller is arranged along the tangent direction of the cross bar, and the plurality of rotating rollers are distributed along the circumference of the connecting shell; The pressure belt is sleeved on the outside of multiple rotating rollers, and the pressure belt includes an inner support belt and an outer deformation belt. The inner support belt and the outer deformation belt are fixedly arranged, and the inner support belt and the outer deformation belt are distributed in sequence from the inside to the outside. A liquid cavity is arranged between the inner support belt and the outer deformation belt, and hydraulic oil is arranged in the liquid cavity. The outer deformation belt can be deformed, and the outer deformation belt and the peripheral wall of the cross bar are against each other.

3. A scaffolding mechanical properties testing device according to claim 1, characterized in that: An impact hammer is fixedly arranged at the lower end of the impact cylinder.

4. A scaffolding mechanical properties testing device according to claim 1, characterized in that: A limiting ring is fixedly arranged on each first mounting frame, and a triangular chuck is fixedly arranged on each first mounting frame; the upper end of the vertical rod is arranged in the limiting ring, and the triangular chuck clamps the lower end of the vertical rod.

5. The scaffolding mechanical properties testing equipment according to claim 1, characterized in that: The rotating disk includes an upper disk, a lower disk and a connecting rod. The upper disk and the lower disk are sequentially distributed along the up and down directions. The connecting rod connects the upper disk and the lower disk. The sliding groove is arranged on the lower disk, and the second mounting frame is fixedly arranged on the upper disk.

6. A scaffold mechanical properties testing device according to claim 5, characterized in that: A connecting pipe is fixedly arranged on the lower side of the lower plate, and the connecting pipe and the lower plate are coaxially arranged; a rotating shaft is fixedly arranged on the upper side of the chassis, and the rotating shaft and the chassis are coaxially arranged; the connecting pipe is rotatably sleeved on the rotating shaft.

7. The scaffolding mechanical properties testing equipment according to claim 5, characterized in that: It also includes a driving mechanism, which includes a driving motor. The driving motor is fixedly arranged on the chassis, and the output shaft of the driving motor is arranged along the radial direction of the chassis. A bevel gear is fixedly arranged on the output shaft of the driving motor; a bevel gear ring is arranged on the peripheral wall of the lower plate, and the bevel gear ring is meshed with the bevel gear.

8. The scaffolding mechanical properties testing equipment according to claim 5, characterized in that: The sliding column includes a square column and a rolling ring. The square column is vertically arranged. The upper end of the square column is fixedly connected to the first mounting frame. The square column is slidably arranged in the sliding groove. The rolling ring is rotatably arranged at the lower end of the square column. The rolling ring is slidably arranged in the elliptical groove.

9. A scaffolding mechanical properties testing device according to claim 1, characterized in that: A loading control box and a plurality of sensors are arranged on the rotating disk. The loading control box is used to control the load applied by the loading hydraulic cylinder to the cross bar, and to control the frequency and impact load of the impact cylinder on the cross bar; each sensor is used to sense the strain of a cross bar.

10. A scaffolding mechanical properties test method, using a scaffolding mechanical properties test device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Rotate the rotating disk, and when the rotating disk rotates, it drives multiple clamping mechanisms and multiple loading mechanisms to rotate synchronously; S2: Each scaffolding specimen rotates around the chassis once, which is a cycle. In each cycle, each scaffolding specimen moves back and forth along the radial direction of the rotating disk, and the loading hydraulic cylinder can apply load to different positions of the crossbar; S3: In each cycle, the loading hydraulic cylinder first applies a load to the crossbar, and then unloads the load applied to the crossbar. The period of applying the load is the loading period, and the period of unloading the load is the unloading period. By changing the size of the loading period and the rotation speed of the rotating disk, the time for the loading hydraulic cylinder to apply the load to the crossbar is changed; S4: The impact cylinder applies random multiple impact loads to the crossbar during both the loading cycle and the unloading cycle, thereby obtaining different impact loads in the same cycle; S5: In different cycles, the loads applied by the impact loading hydraulic cylinder and the impact cylinder to the crossbar can be changed, so as to obtain different load amounts and different impact loads on the crossbar in different cycles.

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