A test device for inspection of prefabricated stair plate structures

Abstract

The application discloses a test device for prefabricated stair plate structure inspection, and relates to the technical field of concrete engineering test, which comprises a support rack, wherein the support rack is provided with an auxiliary moving mechanism, the auxiliary moving mechanism comprises a first sliding component vertically slidingly arranged on a first support plate and a second sliding component vertically slidingly connected to a second support plate; the first sliding component and the second sliding component both comprise a placing frame and a plurality of translation rollers rotatingly arranged in the placing frame. When the prefabricated stair is hoisted onto the support rack, the translation rollers can provide support for the prefabricated stair and then return to the original position. If the position of the prefabricated stair deviates during hoisting, the prefabricated stair can be directly pushed on the support rack to move to a suitable position on the support rack through the first sliding component and the second sliding component.

Description

Technical Field

[0001] This application relates to the technical field of concrete engineering testing, and in particular to a testing apparatus for inspecting precast stair slab structures. Background Technology

[0002] In recent years, my country has vigorously promoted industrialized construction, leading to a rapid expansion of the market and a growing number of prefabricated staircase manufacturers. The quality of prefabricated staircases has a significant impact on the quality of prefabricated buildings, and the structural performance testing of prefabricated staircases is an important aspect of prefabricated concrete structure inspection. Currently, a testing device is commonly used in the structural performance testing of prefabricated staircases to simulate the working conditions of prefabricated stair slabs and conduct loading tests on them.

[0003] During the test, a hoist is typically used to transport the prefabricated stairs to the test support platform. After the stairs are placed stably, loading is applied. During the process of lifting and lowering the stairs onto the test support platform, a dedicated person needs to constantly observe the stairs' position and adjust them to ensure they are in the correct location. If there is a misalignment, the stairs must be lifted and repositioned. This complex operation requires close cooperation between the hoist operator and the staff, and demands a high level of skill from the hoist operator. Summary of the Invention

[0004] To improve the operational difficulty of hoisting prefabricated stairs to the test support frame during structural performance testing, this application provides a test device for testing prefabricated stair structures.

[0005] This application provides a testing device for inspecting precast stair slab structures, employing the following technical solution:

[0006] A test device for inspecting the structure of precast stair slabs includes a support frame, which includes a horizontally arranged support base and a support platform vertically arranged on the support base; a first support plate is arranged above the support platform, and a second support plate is arranged at one end of the support base;

[0007] The support frame is equipped with an auxiliary moving mechanism, which includes a first sliding component that is vertically slidably disposed on the first support plate, and a second sliding component that is vertically slidably connected to the second support plate;

[0008] Both the first sliding assembly and the second sliding assembly include a mounting frame and a plurality of translation rollers rotatably disposed within the mounting frame, and the rotation axes of each translation roller are parallel and perpendicular to the support platform; the support platform is provided with a first driving member for driving the first sliding assembly and the second sliding assembly to move simultaneously in the vertical direction, and the first driving member can simultaneously make the translation roller of the first sliding assembly higher than the surface of the first support plate, and the translation roller of the second sliding assembly higher than the surface of the second support plate.

[0009] By adopting the above technical solution, the first support plate on the support platform and the second support plate on the support base are used to provide support for the prefabricated stairs; a first sliding assembly is slidably arranged on one side of the first support plate, and a second sliding assembly is slidably arranged on one side of the second support plate; both the first and second sliding assemblies include a mounting frame and several translation rollers rotatably arranged in the mounting frame; the first driving member can drive the first and second sliding assemblies to rise so that the translation rollers of the first sliding assembly are higher than the surface of the first support plate, and the translation rollers of the second sliding assembly are higher than the surface of the second support plate.

[0010] When the prefabricated staircase is hoisted onto the support frame, the first and second sliding components support the staircase, and the translation rollers abut against the bottom of the staircase, allowing it to slide. If the staircase deviates from its intended position during hoisting, the first and second sliding components can directly push the staircase onto the support frame to move it to the correct position. This eliminates the need for constant manual adjustments by operators during hoisting, ensuring the staircase is placed correctly on the support frame and reducing the difficulty of hoisting operations.

[0011] Optionally, a base plate is vertically slidably connected to the support pedestal, and a first driving member is used to drive the base plate to move. The base plate is used to simultaneously drive the first sliding component and the second sliding component to rise or fall.

[0012] By adopting the above technical solution, the first driving component is connected to the base plate and directly drives the base plate to move in the vertical direction. During the up and down movement of the base plate, the first sliding component and the second sliding component can be driven to rise or fall at the same time, so as to adjust the positional relationship between the first sliding component and the first support plate and the positional relationship between the second sliding components.

[0013] Optionally, the first support plate is slidably disposed on the support platform, and a first driving mechanism for driving the first support plate to move is provided between the first support plate and the support platform; the support base includes two parallel support bars, the second support plate is slidably connected to the support bars, and a first locking member for locking the second support plate in its slidable position is provided on the second support plate.

[0014] By adopting the above technical solution, the first support plate is slidably mounted on the support platform, and the first driving mechanism is set between the first support plate and the support platform to drive the first support platform to move in the vertical direction; the second support plate is slidably mounted on the support bar, and the second support plate can be fixed to different positions on the support bar by the first locking member; the height adjustment of the first support plate and the horizontal position adjustment of the second support plate are realized, so that the support frame can be used for prefabricated stairs of different sizes.

[0015] Optionally, the support bar near the second support plate has a plurality of threaded grooves spaced apart along the length of the support bar, and the first locking member includes an adjusting bolt that passes through the second support plate for threaded connection with the threaded grooves.

[0016] By adopting the above technical solution, several threaded grooves are opened at intervals on the support bar. When the horizontal sliding support plate is positioned at a suitable position on the support bar, the adjusting bolts passing through the second support plate are threadedly connected to the threaded grooves, so that the position of the second support plate can be fixed after the position is changed.

[0017] Optionally, the first drive mechanism includes two scissor bar assemblies respectively disposed on both sides of the bottom of the first support plate and a second drive member for driving the scissor bar assemblies to extend and retract.

[0018] By adopting the above technical solution, two scissor bar assemblies are respectively set on both sides of the bottom of the first support plate to provide stable support for the first support plate; the second driving component is used to drive the scissor bar assemblies to extend and retract to adjust the height of the scissor bar assemblies, thereby indirectly driving the first support plate above the scissor bar assemblies to move in the vertical direction.

[0019] Optionally, a second drive mechanism is provided on the base plate. The second drive mechanism is used to drive the first sliding component to move in the vertical direction and to drive the second sliding component to move in the direction of approaching or moving away from the support platform.

[0020] By adopting the above technical solution, the first sliding component is driven to move vertically by the second driving mechanism, and the second sliding component moves horizontally. When the positions of the first support plate and the second support plate are adjusted according to the different sizes of prefabricated stairs, the first sliding component can move towards the first support plate under the action of the second driving component, and the second sliding component can move towards the second support plate under the action of the second driving component, so that the auxiliary moving mechanism can also be applied to prefabricated stairs of different sizes.

[0021] Optionally, the second drive mechanism includes a first link group for driving the first sliding component to move and a second link group for driving the second sliding component to move; there are two second link groups, which are respectively arranged on both sides of the first link group; a connecting rod is provided at one end of the base plate near the support platform, and both the first link group and the second link group include a first linkage rod that is rotatably connected to the connecting rod.

[0022] By adopting the above technical solution, the first linkage group is used to drive the first sliding component to move, and the second linkage group is used to drive the second sliding component to move; the first linkage rod of the first linkage group and the second linkage group are rotatably connected to the connecting rod provided on the base plate. When the base plate moves in the vertical direction, it can drive the first linkage group and the second linkage group to move in the vertical direction, so that the first sliding component at one end of the first linkage group passes through the first support plate, and at the same time, the second sliding component at one end of the second connecting rod group can also pass through the second support plate.

[0023] Optionally, a guide bar is provided at the end of the first linkage group away from the connecting rod, and the end of the guide bar away from the base plate is connected to the first sliding assembly; the guide bar includes a slider near the end of the support platform, and the end face of the support platform near the first linkage group is provided with a guide groove for the slider to slide.

[0024] By adopting the above technical solution, one end of the guide bar is connected to the first linkage group, and the other end is connected to the first sliding component. The slider on the guide bar slides in the guide groove opened at the end of the support platform near the first linkage group, so as to restrict the movement direction of the first sliding component and enable the first sliding component to move vertically under the drive of the first linkage group.

[0025] Optionally, the first linkage group and the second linkage group include a second linkage rod rotatably connected to the first linkage rod. The second linkage rod of the first linkage group is fixedly connected to the guide bar. One end of the second linkage rod of the second linkage group is rotatably connected to a third linkage rod. The third linkage rod is fixedly connected to the second sliding assembly. A telescopic rod is provided between the connected second linkage rod and the first linkage rod. The telescopic rod includes a locking rod and a locking sleeve that are slidably connected. The opposite ends of the telescopic rod and the locking sleeve are respectively rotatably connected to the outer circumferential side wall of the locking sleeve of the first linkage rod or the second linkage rod, and a plurality of locking bolts for abutting the telescopic rod are threaded on them.

[0026] By adopting the above technical solution, the second linkage rod of the first linkage group is fixedly connected to the guide bar, and indirectly drives the second sliding component to move by driving the guide bar to move; the second linkage rod of the second linkage group is connected to the third linkage rod, and drives the second sliding component to move by pushing the third linkage rod; the locking rod is rotatably connected to the first linkage rod, and the locking sleeve is slidably sleeved on the locking rod and its other end is rotatably connected to the second linkage rod. When the first linkage rod and the second linkage rod move relative to each other, the locking sleeve slides relative to the locking rod; tightening the locking bolt abuts the telescopic rod to reduce the possibility of the locking sleeve sliding again, so that the included angle between the first linkage rod and the second linkage rod remains unchanged, thereby locking the second drive mechanism.

[0027] Optionally, a V-shaped support strip is provided at the end of the second support plate away from the support platform along a direction perpendicular to the axis of the translation roller, with the opening of the V-shaped support strip facing downward; a support roller parallel to the V-shaped support strip is slidably provided on the second support plate, and the second support plate has a movable groove for the support roller to roll.

[0028] By adopting the above technical solution, the first support plate provides support for the precast staircase through V-shaped support strips, and the second support plate provides support for the precast staircase through support rollers, so as to reduce the contact area between the precast staircase and the first and second support plates, so that the first and second support plates provide vertical upward force for the precast staircase, and reduce the interference caused by the horizontal force at the contact point between the precast staircase and the support frame to the structural performance testing of the precast staircase.

[0029] In summary, this application includes at least one of the following beneficial effects:

[0030] 1. The first and second sliding components allow operators to directly adjust the position of the precast stairs on the support frame, reducing the difficulty of hoisting the precast stairs and effectively reducing the need for repeated hoisting due to hoisting errors.

[0031] 2. The setting of the first drive mechanism between the support platform and the first support plate, and the setting of the threaded groove on the support bar and the adjusting bolt on the second support plate, realize the position adjustment of the first support plate and the second support plate, so that the support platform can be used for prefabricated stairs of different sizes;

[0032] 3. The addition of reinforcing ribs and reinforcing rods can improve the support stability of the support frame. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure when used in the embodiments of this application;

[0034] Figure 2 This is a side view schematic diagram of an embodiment of this application;

[0035] Figure 3 This is a schematic diagram highlighting the structure of the first link assembly in the embodiments of this application;

[0036] Figure 4 This is a schematic diagram highlighting the structure of the second link assembly in the embodiments of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Support frame; 11. Support column; 12. Support base; 121. Support bar; 122. Threaded groove; 13. Support platform; 131. Guide groove; 14. First support plate; 141. Through groove; 15. Second support plate; 151. Adjusting bolt; 152. Movable groove; 16. First drive mechanism; 161. Scissor bar assembly; 162. Second drive component; 17. Reinforcing rib; 2. Base plate; 21. First sliding assembly; 22. Second sliding assembly Components; 221, mounting frame; 222, translation roller; 23, first driving component; 24, second driving mechanism; 241, first linkage group; 2411, first linkage rod; 2412, second linkage rod; 242, second linkage group; 2421, third linkage rod; 25, connecting rod; 26, telescopic rod; 261, locking rod; 262, locking sleeve; 2621, locking bolt; 3, guide bar; 31, slider; 4, V-shaped support bar; 5, support roller; 6, reinforcing rod. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0039] This application discloses a testing device for inspecting precast stair slab structures, referring to... Figure 1 A testing device for inspecting the structure of precast stair slabs includes a support frame 1. The support frame 1 includes a horizontally arranged support base 12 and a support platform 13 perpendicular to the support base 12. A long strip-shaped first support plate 14 is provided on the top of the support platform 13, and a long strip-shaped second support plate 15 is provided at one end of the support base 12. The length directions of the first and second support plates are the same. A V-shaped support bar 4 is fixedly arranged on the surface of the first support plate 14 away from the support platform 13 along the length direction perpendicular to the first support plate 14, and the opening of the V-shaped support bar 4 is downward. In this embodiment, the V-shaped support bar 4 is made of angle steel. A movable groove 152 parallel to the V-shaped support bar 4 is opened on the end face of the second support plate 15 near the support platform 13. A support roller 5 is rolled in the movable groove 152, and the axis of the support roller 5 is parallel to the length direction of the V-shaped support bar 4. When the precast stair slab is placed on the support frame 1, the support roller 5 and the V-shaped support bar 4 abut against the bottom of the precast stair slab, providing a vertically upward support force for the precast stair slab.

[0040] The support frame 1 also includes several reinforcing ribs 17. In this embodiment, eight reinforcing ribs 17 are provided and are evenly distributed on both sides of the support platform 13. One end of the reinforcing rib 17 is fixed to the side wall of the support platform 13, and the other end is fixed to the side wall of the support base frame 12, which improves the support strength of the support frame 1.

[0041] Reference Figure 1 and Figure 2The support base 12 includes a support column 11 at one end away from the support platform 13, and the support columns 11 are evenly arranged on both sides of the bottom of the support base 12. A base plate 2 is slidably arranged at one end of the support base 12 away from the support platform 13. An auxiliary moving mechanism is movably arranged on the support platform 1. The auxiliary moving mechanism includes a first sliding component 21 slidably arranged on the first support plate 14 in the vertical direction and a second sliding component 22 slidably arranged on the base plate 2 in the direction of approaching or away from the support platform 13. The first sliding component 21 and the second sliding component 22 have the same structure, both including a mounting frame 221 and a plurality of translation rollers 222 rotating in the mounting frame 221. The rotation axes of all translation rollers 222 in each mounting frame 221 are parallel, and the rotation axes of the translation rollers 222 are perpendicular to the axis of the first support roller 5.

[0042] Reference Figure 1 and Figure 2 The first support plate 14 has a through groove 141 at one end near the second support plate 15, and the second support plate 15 also has a through groove 141 at one end near the support platform 13. A first driving member 23 is provided at the end of the base plate 2 away from the support platform 13. In this embodiment, the first driving member 23 is specifically a hydraulic jack, and two hydraulic jacks are provided, located at opposite ends of the base plate 2. Driving the first driving member 23 causes the base plate 2 to move vertically upward, causing the first sliding assembly 21 and the second sliding assembly 22 to move upward along the through groove 141. The top of the translation roller 222 of the first sliding assembly 21 is higher than the V-shaped support strip 4, and the top of the translation roller 222 of the second sliding assembly 22 is higher than the support roller 5. When the operator hoists the prefabricated staircase onto the support frame 1, the prefabricated staircase can be directly placed on the support frame 1 and abutted against the translation rollers 222 on the first sliding component 21 and the second sliding component 22. Then, the prefabricated staircase is pushed on the support frame 1 to place it in the appropriate position. This reduces the difficulty and time of operation for hoisting and operating personnel when placing the prefabricated staircase, and effectively simplifies the operation process of the prefabricated staircase structural performance test.

[0043] Reference Figure 1 and Figure 2A first support plate 14 is slidably mounted on a support platform 13. A first drive mechanism 16 is provided between the first support plate 14 and the support platform 13. The first drive mechanism 16 includes two scissor bar assemblies 161 respectively disposed on both sides of the bottom of the first support plate 14. Each scissor bar assembly 161 is equipped with a second drive component 162 for driving the scissor bar assembly 161 to extend and retract. In this embodiment, the second drive component 162 is specifically a hydraulic cylinder. The support base frame 12 includes two parallel support bars 121. The end of the support bar 121 near the second support plate 15 has a plurality of threaded grooves 122 spaced apart along the length direction of the support bar 121. A plurality of adjusting bolts 151 are passed through the second support plate 15. In this embodiment, six adjusting bolts 151 are specifically provided, evenly disposed on both sides of the second support plate 15 and threadedly connected to the threaded grooves 122 on the support bars 121.

[0044] The first drive mechanism 16 is set to adjust the vertical position of the first support plate 14. The adjusting bolts 151 on the second support plate 15 are connected to the threaded holes at different positions on the support bar 121 to adjust the horizontal position of the second support plate 15, so that the support frame 1 can be used for prefabricated stairs of different sizes.

[0045] Reference Figure 1 and Figure 2 The base plate 2 is provided with a second drive mechanism 24 at one end near the support platform 13. The second drive mechanism 24 includes a first link group 241 for driving the first sliding component 21 and a second link group 242 for driving the second sliding component 22. There are two second link groups 242, which are located on both sides of the first link group 241 respectively, and the two second link groups 242 are reinforced by multiple reinforcing rods 6.

[0046] Reference Figure 2 and Figure 3A connecting rod 25 is fixed on the side of the base plate 2 near the support platform 13. The first link group 241 and the second link group 242 both include a first linkage rod 2411 rotatably connected to the connecting rod 25 and a second linkage rod 2412 hinged to the end of the first linkage rod 2411 away from the connecting rod 25. A vertical guide bar 3 is fixedly connected to the end of the second linkage rod 2412 of the first link group 241 away from the first linkage rod 2411. The end of the guide bar 3 away from the connecting rod 25 is fixedly connected to the bottom wall of the mounting frame 221 of the first sliding component 21; a slider 31 is provided at the end of the guide bar 3 near the support platform 13, and a guide groove 131 is provided vertically at the end of the support platform 13 near the guide bar 3 to allow the slider 31 to slide; when the operator moves the first linkage group 241, the guide bar 3 can move towards or away from the first support plate 14, thereby causing the first sliding component 21 located at one end of the guide bar 3 to move towards or away from the first support plate 14; when the height of the first support plate 14 changes according to the size of the prefabricated staircase, the first linkage group 241 can also adjust the position of the first sliding component 21 according to the position of the first support plate 14 so that the first sliding component 21 can be used for prefabricated staircases of different sizes.

[0047] Reference Figure 2 and Figure 4 The second linkage 2412 of the second linkage group 242 is rotatably connected to a third linkage 2421 at the end away from the first linkage 2411. The third linkage 2421 is horizontally positioned and fixedly connected to the second sliding assembly 22. When the operator moves the second support plate 15, the two second linkage groups 242 can drive the second sliding assembly 22 to move together with the second support plate 15. When the horizontal position of the second support plate 15 changes according to the size of the prefabricated staircase, the second linkage group 242 can adjust the position of the second sliding assembly 22 according to the position of the second support plate 15, so that the second sliding assembly 22 can also be used for prefabricated staircases of different sizes.

[0048] Reference Figure 3 and Figure 4Both the first linkage group 241 and the second linkage group 242 are equipped with telescopic rods 26 that serve a locking function. Each telescopic rod 26 includes a locking rod 261 and a locking sleeve 262 that is slidably fitted outside the locking rod 261. The two ends of the telescopic rod 26 are rotatably connected to the first linkage rod 2411 and the second linkage rod 2412, respectively, allowing the locking rod 261 and the locking sleeve 262 to slide relative to each other during adjustment of the first linkage group 241 and the second linkage group 242. In other embodiments, the end of the locking rod 261 furthest from the locking sleeve 262 may be fixedly connected to the first linkage rod 2411, or the end of the locking sleeve 262 furthest from the locking rod 261 may be fixedly connected to the second linkage rod 2412. Several locking bolts 2621 are provided on the outer circumferential side wall of the locking sleeve 262 near the telescopic rod 26. In this embodiment, there are two locking bolts 2621. When the locking sleeve 262 slides out of the telescopic rod 26 to a suitable position, tightening the locking bolts 2621 can reduce the possibility of secondary sliding between the locking sleeve 262 and the telescopic rod 26, so as to ensure that the included angle between the first linkage rod 2411 and the second linkage rod 2412 remains stable. This makes it less likely for the first sliding component 21 to shift position after it is adjusted to a suitable position.

[0049] Once the locking sleeve 262 is fixed in position, the telescopic rod 26 and the locking sleeve 262 form a triangular structure with the first linkage rod 2411 and the second linkage rod 2412 to improve the support stability of the first sliding assembly 21 for the prefabricated staircase during use. The second linkage group 242 is also equipped with the telescopic rod 26, the locking sleeve 262, and the limiting block, and the installation method and working principle are the same as those of the first linkage group 241, which will not be described in detail here.

[0050] The implementation principle of the test device for inspecting the structure of precast stair slabs in this application embodiment is as follows: The operator drives the second drive component 162 according to the size of the precast stair slab to make the first support plate 14 in a suitable position; then the adjusting bolt 151 on the second support plate 15 is screwed into the threaded groove 122 of the support bar 121 to make the second support plate 15 in a suitable position. The second drive mechanism 24 is adjusted so that the first sliding component 21 is close to the through groove 141 of the first support plate 14, and the second sliding component 22 is in the through groove 141 of the second support plate 15; the locking bolts 2621 on each locking sleeve 262 are tightened to fix the position of the locking sleeve 262; then the hydraulic jack is driven to lift the base plate 2 so that the first sliding component 21 passes through the first support plate 14, and the second sliding component 22 is located in the through groove 141 of the second support plate 15. At this time, the translation roller 222 in the first sliding component 21 is higher than the V-shaped support bar 4, and the translation roller 222 in the second sliding component 22 is higher than the support roller 5.

[0051] When the operator lifts the precast staircase and places it on the support frame 1, the translation roller 222 abuts against the precast staircase to support it. If the first sliding component 21 fails to abut against the precast staircase at this time, the position of the first sliding component 21 and the height of the first support plate 14 can still be adjusted by loosening the locking bolt 2621, pushing the precast staircase to a suitable position on the support frame 1; then, the hydraulic jack is adjusted to reset the base plate 2, allowing the first sliding component 21 to disengage from the first support plate 14. The second sliding component 22 disengages from the second support plate 15. With one end of the precast staircase abutting against the support roller 5 and the other end abutting against the V-shaped support strip 4, static or dynamic loads can be applied to the precast staircase to test its structural performance.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A testing device for inspecting the structure of precast stair slabs, characterized in that: The system includes a support frame (1), which includes a horizontally arranged support base (12) and a support platform (13) vertically arranged on the support base (12); a first support plate (14) is arranged above the support platform (13), and a second support plate (15) is arranged at one end of the support base (12); the support frame (1) is provided with an auxiliary moving mechanism, which includes a first sliding component (21) vertically slidably arranged on the first support plate (14), and a second sliding component (22) vertically slidably connected to the second support plate (15). Both the first sliding assembly (21) and the second sliding assembly (22) include a mounting frame (221) and a plurality of translation rollers (222) rotatably disposed within the mounting frame (221), and the rotation axes of each translation roller (222) are parallel and perpendicular to the support platform (13); the support platform (1) is provided with a first driving member (23) for driving the first sliding assembly (21) and the second sliding assembly (22) to move simultaneously in the vertical direction, and the first driving member (23) can simultaneously make the translation roller (222) of the first sliding assembly (21) higher than the surface of the first support plate (14) and the translation roller (222) of the second sliding assembly (22) higher than the surface of the second support plate (15); A base plate (2) is vertically slidably connected to the support frame (12). The first driving member (23) is used to drive the base plate (2) to move. The base plate (2) is used to simultaneously drive the first sliding component (21) and the second sliding component (22) to rise or fall. The base plate (2) is provided with a second driving mechanism (24), which is used to drive the first sliding component (21) to move in the vertical direction and to drive the second sliding component (22) to move in the direction of approaching or moving away from the support platform (13); The second drive mechanism (24) includes a first link group (241) for driving the first sliding component (21) to move and a second link group (242) for driving the second sliding component (22) to move; there are two second link groups (242) respectively located on both sides of the first link group (241); a connecting rod (25) is provided at one end of the base plate (2) near the support platform (13), and both the first link group (241) and the second link group (242) include a first linkage rod rotatably connected to the connecting rod (25); The first link assembly (241) is provided with a guide bar (3) at one end away from the connecting rod (25), and the guide bar (3) at one end away from the base plate (2) is connected to the first sliding assembly (21); the guide bar (3) includes a slider (31) near one end of the support platform (13), and the end face of the support platform (13) near the first link assembly (241) is provided with a guide groove (131) for the slider (31) to slide. The first linkage group (241) and the second linkage group (242) include a second linkage rod (2412) rotatably connected to the first linkage rod (2411). The second linkage rod (2412) of the first linkage group (241) is fixedly connected to the guide bar (3). One end of the second linkage rod (2412) of the second linkage group (242) is rotatably connected to a third linkage rod (2421). The third linkage rod (2421) is fixedly connected to the second sliding assembly (22). A telescopic rod (26) is provided between the second linkage rod (2412) and the first linkage rod (2411). The telescopic rod (26) includes a slidingly connected telescopic rod (26) and a locking sleeve (262). The opposite ends of the telescopic rod (26) and the locking sleeve (262) are respectively rotatably connected to the first linkage rod (2411) or the second linkage rod (2412). Several locking bolts (2621) for abutting the telescopic rod (26) are threaded on the outer circumferential side wall of the locking sleeve (262).

2. The testing device for inspecting precast stair slab structures according to claim 1, characterized in that: The first support plate (14) is slidably disposed on the support platform (13), and a first driving mechanism (16) for driving the first support plate (14) to move is provided between the first support plate (14) and the support platform (13); the support base frame (12) includes two parallel support bars (121), the second support plate (15) is slidably connected to the support bars (121), and a first locking member for locking the second support plate (15) after sliding is provided on the second support plate (15).

3. The testing device for inspecting precast stair slab structures according to claim 2, characterized in that: The support bar (121) has a plurality of threaded grooves (122) spaced apart along the length of the support bar (121) at one end near the second support plate (15). The first locking member includes an adjusting bolt (151) that passes through the second support plate (15) for threaded connection with the threaded grooves (122).

4. The testing device for inspecting precast stair slab structures according to claim 2, characterized in that: The first drive mechanism (16) includes two scissor bar assemblies (161) respectively disposed on both sides of the bottom of the first support plate (14) and a second drive member (162) for driving the scissor bar assemblies (161) to extend and retract.

5. The testing device for inspecting precast stair slab structures according to claim 1, characterized in that: The second support plate (15) has a V-shaped support strip (4) at one end away from the support platform (13) in a direction perpendicular to the axis of the translation roller (222), and the V-shaped support strip (4) opens downward; the second support plate (15) has a support roller (5) parallel to the V-shaped support strip (121) slidably arranged, and the second support plate (15) has an active groove (152) for the support roller (5) to roll.

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