A test platform for prefabricated building structure performance and test method thereof

Abstract

The present invention relates to the field of prefabricated building test technology, and discloses a prefabricated building structure performance test platform and a test method thereof, comprising a bottom plate, a lower wall, and an upper wall, wherein the bottom plate and the lower wall are movably connected and fixed by a connecting mechanism. During the experiment, a plurality of lifting rings are used to lift the upper wall to the top of the lower wall, and the lifting motor drives the screw to rotate, so that the circular plate and the like rise, and then the guide plate is flipped to an inclined state through the gear rack transmission, so as to facilitate the alignment of the first through hole of the upper wall and the upper steel bar. During the descent of the upper wall, the upper steel bar extends to the grouting cavity and contacts the extrusion plate. When the upper wall and the annular plate are in contact, the sensor prompts that the connection is in place, the lifting is released, and the mass of the upper wall is measured. Subsequently, the electric cylinder drives the upper wall and the like to descend, and its length in the grouting cavity is calculated based on the initial and descending data of the upper steel bar. Finally, concrete mortar is poured into the grouting hole, and the wall connection stability is enhanced after solidification.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building testing, and more particularly to a prefabricated building structure performance testing platform and a testing method thereof. Background Art

[0002] Prefabricated buildings are structures assembled on-site using prefabricated components. Similar to building with building blocks, prefabricated factory beams, slabs, columns, walls, and other components are transported to the construction site and assembled using reliable connections to create a complete building.

[0003] The structural safety of prefabricated buildings is crucial. Repeated testing, such as static and dynamic load testing of prefabricated components, verifies their mechanical properties under various loads, ensuring they will not fail due to stress during use. This safeguards the stability and safety of the building structure and ensures that the materials meet design requirements.

[0004] Currently, during testing, a hoisting device is used to lift the wall into position, and then workers manually dock the prefabricated components to complete the connection and testing. However, this manual docking procedure during wall installation poses a significant safety hazard. If the rope breaks or the wall collapses, it could easily cause injury to the workers. Therefore, there is an urgent need to design a test device with automatic docking capabilities to improve test safety and efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a prefabricated building structure performance test platform and a test method thereof to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: an assembled building structure performance test platform, comprising a bottom plate, a lower wall, and an upper wall, the bottom plate and the lower wall being movably connected and fixed by a connecting mechanism, the connecting mechanism being used to support the lower wall, a lifting cavity being opened in the lower wall, three sliding holes being opened at the top of the lifting cavity, upper steel bars being slidably installed in the three sliding holes, the bottom ends of the three upper steel bars extending into the lifting cavity and connected to a quality detection mechanism, three grouting cavities being opened in the upper wall, and in-place detection mechanisms being respectively provided in the three grouting cavities for matching with the three upper steel bars, a circular groove being opened at the bottom of the lifting cavity, a plurality of rectangular sliding holes being opened on the side inner wall of the circular groove, lifting blocks being slidably installed in the plurality of rectangular sliding holes through the lifting mechanism, lifting plates being installed on the sides of the plurality of lifting blocks through a detachable mechanism, and guide mechanisms being provided on the tops of the plurality of lifting plates, so that the plurality of guide mechanisms enable the upper wall to automatically align with the lower wall when moving downward.

[0007] Furthermore, the connecting mechanism includes multiple lower steel bars, multiple lower steel bar grooves are opened on the top of the bottom plate, and the lower parts of the multiple lower steel bars are respectively fixed in the multiple lower steel bar grooves, and multiple upper steel bar grooves are opened at the bottom of the lower wall, and the upper parts of the multiple lower steel bars extend into the multiple upper steel bar grooves respectively. Two U-shaped blocks are fixedly installed on the top of the bottom plate and the side of the lower wall, and mounting shafts are fixedly installed on the two U-shaped blocks located on the bottom plate, and support rods are rotatably installed on the two mounting shafts. Mounting holes are opened on the two U-shaped blocks located on the lower wall, and fixing bolts are passed through the mounting holes of each U-shaped block on the lower wall. A nut is threaded on each fixing bolt, and the upper end of the support rod is rotatably connected to the fixing bolt on the corresponding side.

[0008] Furthermore, the quality inspection mechanism includes a weighing plate, and a plurality of mounting grooves are provided at the bottom of the lifting chamber. Electric cylinders are fixedly installed in the plurality of mounting grooves, and the movable ends of the plurality of electric cylinders are fixedly connected to the bottom of the weighing plate. A rectangular plate is fixedly installed on the top of the weighing plate, and the top of the rectangular plate is fixedly connected to the bottom ends of the plurality of upper steel bars.

[0009] Furthermore, the in-place detection mechanism includes an upper sensor and a lower sensor, an annular plate is fixedly installed on the top of the grouting chamber, an upper sensing groove is provided at the bottom end of the annular plate, and the upper sensor is fixedly installed in the upper sensing groove, a sliding chamber is provided in the upper wall, a sliding shaft is slidably installed in the annular plate, the top end of the sliding shaft extends into the sliding chamber and is fixedly installed with a limiting plate, the bottom end of the sliding shaft extends into the grouting chamber and is fixedly installed with an extrusion plate, a lower sensing groove is provided at the top of the extrusion plate, and the lower sensor is fixedly installed in the lower sensing groove, a first through hole is provided at the bottom of the grouting chamber, the upper steel bar extends into the grouting chamber through the first through hole and conflicts with the bottom of the extrusion plate.

[0010] Furthermore, two connecting columns are fixedly installed on the top of the lower wall, and the outer walls of the two connecting columns are provided with multiple fixing holes. Two connecting cavities are opened in the upper wall, and the bottom ends of the two connecting cavities are provided with second through holes. The two connecting columns pass through the two second through holes and extend into the two connecting cavities respectively. A grouting hole is opened at the top of one of the connecting cavities, and the multiple grouting cavities are connected to the multiple connecting cavities through connecting holes. Multiple lifting rings are fixedly provided on the top of the upper wall.

[0011] Furthermore, the lifting mechanism includes a circular plate, which is slidably arranged in a circular groove, and four screws are rotatably installed on the bottom inner wall of the circular groove, and the screws are threadedly connected to the circular plate. The top ends of the four screws are rotatably installed on the top inner wall of the lifting chamber, and each adjacent two screws are connected by a transmission assembly, and the transmission assembly includes two first synchronous pulleys, and the two first synchronous pulleys are respectively fixedly sleeved on two of the screws, and the two first synchronous pulleys are connected by a first synchronous belt. A motor slot is provided at the bottom of the circular groove, and a lifting motor for driving one of the screws to rotate is fixedly installed in the motor slot.

[0012] Furthermore, the detachable mechanism includes a connecting bolt, two pins are fixedly installed on the side of the lifting plate, two pin grooves are provided on the side of the lifting block, the two pins extend into the two pin grooves respectively, and a threaded groove is provided on the side of the lifting block. The connecting bolt slides through the lifting plate and extends into the threaded hole and is threadedly connected to the lifting block.

[0013] Furthermore, the guide mechanism includes a guide plate, a flip groove is provided on the top of the lifting plate, a square groove is provided on the bottom of the lifting plate, a rectangular groove is provided on the lifting plate between the flip groove and the square groove, a rotating shaft is rotatably installed in the flip groove, one end of the rotating shaft extends into the rectangular groove, the guide plate is fixedly sleeved on the rotating shaft, and a control component for driving the rotating shaft to rotate is provided in the square groove.

[0014] Furthermore, the control component includes a transmission shaft, which is rotatably installed in a square groove, one end of the transmission shaft extends into a rectangular groove, and a second synchronous pulley is fixedly sleeved on the transmission shaft and the outside of the rotating shaft, and the two second synchronous pulleys are connected by a second synchronous belt, a transmission gear is fixedly installed on the transmission shaft, a spur rack is fixedly installed on the side of the lower wall, and the spur rack is meshed with the transmission gear, and an avoidance groove adapted to the spur rack is opened on one side of the square groove.

[0015] A test method for the above-mentioned prefabricated building structure performance test platform is characterized by comprising the following steps:

[0016] S1. Guide and install the lower wall on the top of the base plate through multiple lower steel bars, flip the two support rods so that their upper ends are placed in the U-shaped blocks on the sides of the lower wall, and fix them with fixing bolts;

[0017] S2. The upper wall is lifted to the top of the lower wall. The lifting motor drives the screw to rotate, causing the circular plate, lifting block, and lifting plate to move synchronously. When the lifting plate reaches a suitable position, the meshing action of the transmission gear and the spur rack drives the transmission shaft to rotate, thereby causing the guide plate to flip to an inclined state. When the upper wall moves downward, the first through hole at the bottom thereof is aligned with the upper steel bar through the guidance of the multiple guide plates.

[0018] S3. As the upper wall continues to move downward, the upper steel bar extends through the first through hole into the grouting cavity and contacts the extrusion plate. When the upper wall and the annular plate continue to descend until the annular plate and the extrusion plate are in contact, the upper sensor and the lower sensor contact, thereby sending an electrical signal to indicate that the upper steel bar is properly connected to the upper wall. The lifting is then released, and the mass of the upper wall is measured using a weighing plate.

[0019] S4. After monitoring the quality data of the upper wall, multiple electric cylinders are used to drive the rectangular plate, the upper steel bars, and the upper wall to move downward synchronously until the upper wall falls to the top of the lower wall. The length of the upper steel bars initially extending out of the lower wall is recorded as x, and the distance the upper steel bars are lowered by the electric cylinders is recorded as y. The length of the upper steel bars extending into the grouting cavity is calculated as xy.

[0020] S5. Concrete mortar is poured into the connection cavity through the grouting holes. Its fluidity is used to make it flow into the grouting cavity through the connecting holes. After solidification, it is connected to the upper steel bar. At the same time, the concrete mortar will flow into the fixing holes of the connection column. After solidification, it is connected to the connection column, thereby enhancing the stability of the wall after connection.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By lifting the upper wall to the top of the lower wall, the lifting motor drives the screw to rotate, so that the circular plate, lifting block and lifting plate move upward synchronously. When the lifting plate reaches the appropriate position, the meshing action of the transmission gear and the spur rack drives the transmission shaft to rotate, thereby causing the guide plate to flip to an inclined state, so that when the upper wall moves downward, the first through hole at the bottom thereof is aligned with the upper steel bar through the guiding action of multiple guide plates. With this arrangement, the upper wall and the lower wall can be automatically aligned without the assistance of staff, thereby improving safety performance.

[0023] 2. As the upper wall continues to move downward, the upper steel bar extends through the first through hole into the grouting cavity and contacts the extrusion plate. When the upper wall and the annular plate continue to descend until the annular plate fits the extrusion plate, the upper sensor and the lower sensor contact each other, thereby sending an electrical signal to indicate that the upper steel bar is connected to the upper wall. Then the lifting is released and the weighing plate is used to measure the mass of the upper wall.

[0024] 3. After monitoring the upper wall quality data, multiple electric cylinders are used to drive the rectangular plate, upper steel bars, and upper wall to move downward synchronously until the upper wall falls to the top of the lower wall. The initial length of the upper steel bars extending out of the lower wall is recorded as x, and the distance the electric cylinder drives the upper steel bars down is recorded as y. The length of the upper steel bars extending into the grouting cavity is calculated as xy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of this embodiment;

[0026] Figure 2 This is a schematic diagram of the partial cross-section structure of the side cover in this embodiment;

[0027] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0028] Figure 4 This is a schematic diagram of the partial cross-section structure of the lower wall and the circular plate in this embodiment;

[0029] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0030] Figure 6 This is a schematic diagram of the partial cross-section structure of the upper wall, annular plate, and extruded plate in this embodiment;

[0031] Figure 7 for Figure 6 The enlarged structural diagram at C in the middle;

[0032] Figure 8 This is a schematic diagram of the partial cross-section structure of the lower wall and lifting block in this embodiment;

[0033] Figure 9 for Figure 8 The enlarged structural diagram at D in the middle;

[0034] Figure 10 This is a schematic diagram of a partial cross-section structure of the lifting plate in this embodiment;

[0035] Figure 11 for Figure 10 The enlarged structural diagram at E in the middle;

[0036] Figure 12 for Figure 10 The enlarged structural diagram at F in the middle;

[0037] Figure 13 This is a partially cutaway and enlarged structural diagram of the lifting plate and lifting block in this embodiment;

[0038] Figure 14 for Figure 13 Enlarged structural diagram at G in the middle.

[0039] The accompanying drawings are marked as follows: 1. bottom plate; 2. lower wall; 3. upper wall; 4. guide plate; 5. lower steel bar; 6. U-shaped block; 7. mounting shaft; 8. support rod; 9. fixing bolt; 10. lifting chamber; 11. upper steel bar; 12. rectangular plate; 13. electric cylinder; 14. weighing plate; 15. grouting chamber; 16. annular plate; 17. upper sensor; 18. sliding chamber; 19. sliding shaft; 20. limit plate; 21. extrusion plate; 22. lower sensor; 23. connecting column; 24. connecting chamber; 25. grouting hole; 26. connecting Through hole; 27. Lifting ring; 28. Rectangular slide hole; 29. Lifting block; 30. Round groove; 31. Screw; 32. First synchronous pulley; 33. First synchronous belt; 34. Lifting motor; 35. Round plate; 36. Lifting plate; 37. Rectangular groove; 38. Rotating shaft; 40. Square groove; 41. Drive shaft; 42. Second synchronous pulley; 43. Second synchronous belt; 44. Drive gear; 45. Straight rack; 46. Avoidance groove; 47. Pin; 48. Connecting bolt; 49. PLC controller; 50. Side cover. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation. The structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement solutions or common means, they will not be described in detail herein, but they still fall within the scope of protection of this application.

[0041] Figures 1-14 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1-14 The present invention is further described.

[0042] Refer to the attached Figure 1 -Attached Figure 14, an assembled building structure performance test platform, including a bottom plate 1, a lower wall 2, and an upper wall 3. The bottom plate 1 and the lower wall 2 are movably connected and fixed by a connecting mechanism. The connecting mechanism is used to support the lower wall 2. A lifting cavity 10 is opened in the lower wall 2. The top of the lifting cavity 10 is provided with three sliding holes that pass through the lower wall 2. Upper steel bars 11 are slidably installed in the three sliding holes. The bottom ends of the three upper steel bars 11 extend into the lifting cavity 10 and are connected to a quality inspection mechanism. Three grouting holes are opened in the upper wall 3. Cavity 15, the three grouting cavities 15 are respectively provided with an in-place detection mechanism adapted to the three upper steel bars 11, a toroidal groove 30 is provided at the bottom of the lifting cavity 10, and a plurality of rectangular sliding holes 28 are provided on the side of the toroidal groove 30, and lifting blocks 29 are slidably installed in the plurality of rectangular sliding holes 28 through the lifting mechanism, and the sides of the plurality of lifting blocks 29 are all installed with lifting plates 36 through a detachable mechanism, and the tops of the plurality of lifting plates 36 are provided with guide mechanisms, and the plurality of guide mechanisms enable the upper wall 3 to automatically align with the lower wall 2 when moving downward.

[0043] Specifically, an equipment slot is opened on the side of the lower wall 2, and a PLC controller 49 is fixedly installed in the equipment slot. The PLC controller 49 is an existing technology, and its specific installation method and working principle are not described here. A wireless transmission module is provided on the PLC controller 49, which can be connected to a computer through the wireless transmission module. Specifically, the wireless transmission module can be a Bluetooth transmission module or a wifi module, which are both existing technologies. The specific transmission method is not described here. A side cover 50 is detachably installed on the side of the lower wall 2 to protect the PLC controller 49.

[0044] like Figure 2 and Figure 3 As shown, the connecting mechanism includes multiple lower steel bars 5, multiple lower steel bar grooves are opened at the top of the bottom plate 1, and the lower parts of the multiple lower steel bars 5 are respectively fixedly arranged in the multiple lower steel bar grooves, and multiple upper steel bar grooves are opened at the bottom of the lower wall 2, and the upper parts of the multiple lower steel bars 5 extend into the multiple upper steel bar grooves, respectively. Two U-shaped blocks 6 are fixedly installed on the top of the bottom plate 1 and the side of the lower wall 2, and the two U-shaped blocks 6 on the bottom plate 1 are fixedly installed with mounting shafts 7. A support rod 8 is provided between the two corresponding U-shaped blocks 6 on the bottom plate 1 and the lower wall 2, and the lower end of the support rod 8 is rotatably connected to the mounting shaft 7 on the corresponding side. A mounting hole is opened on the two U-shaped blocks 6 on the lower wall 2, and a fixing bolt 9 is passed through the mounting hole of each U-shaped block 6 on the lower wall 2. A nut is threaded on each fixing bolt 9, and the upper end of the support rod 8 is rotatably connected to the fixing bolt 9 on the corresponding side.

[0045] In this embodiment, the lower wall 2 can be positioned through the guiding cooperation of multiple lower steel bars 5 and multiple lower steel bar grooves, and the lower wall 2 can be fixed and limited by multiple support rods 8, so that the lower wall 2 can be more stable after placement.

[0046] like Figure 4 and Figure 5 As shown, the quality inspection mechanism includes a weighing plate 14. Specifically, the weighing plate 14 is prior art. Its specific installation method and working principle can refer to the technical content of a weight sensor disclosed in utility model patent CN205228599U. The bottom of the lifting chamber 10 is provided with multiple mounting slots, each of which is fixedly installed with an electric cylinder 13. Specifically, the electric cylinder 13 can be controlled by a hydraulic station and a solenoid valve connected to the PLC controller 49. The movable ends of the multiple electric cylinders 13 are fixedly connected to the bottom of the weighing plate 14. The top of the weighing plate 14 is fixedly installed with a rectangular plate 12. The top of the rectangular plate 12 is fixedly connected to the bottom ends of the multiple upper steel bars 11. The lower wall 2 is provided with a threading hole for the cable of the electric cylinder 13 to pass through.

[0047] In this embodiment, after the upper wall 3 is lifted, the quality of the upper wall 3 is detected by the weighing plate 14, and the weighing plate 14 and the rectangular plate 12 are driven downward by the electric cylinder 13 to measure the length of the upper steel bar 11 extending into the grouting cavity 15.

[0048] like Figure 6 and Figure 7 As shown, the in-place detection mechanism includes an upper sensor 17 and a lower sensor 22. Specifically, the upper sensor 17 and the lower sensor 22 are both existing technologies, and their specific working principles are not described here. The upper sensor 17 and the lower sensor 22 are both electrically connected to the PLC controller 49. The top of the grouting chamber 15 is fixedly installed with an annular plate 16, and the bottom end of the annular plate 16 is provided with an upper sensing groove. The upper sensor 17 is fixedly installed in the upper sensing groove. A sliding cavity 18 is provided in the upper wall 3, and a sliding shaft 19 is slidably installed in the annular plate 16. The top end of the sliding shaft 19 extends into the sliding cavity 18 and is fixedly mounted with a limit plate 20. The limit plate 20 and the sliding cavity 18 can slide relative to each other, and the limit plate 20 is provided with an upper balancing port. The bottom end of the sliding shaft 19 extends into the grouting cavity 15 and is fixedly mounted with an extrusion plate 21. The top of the extrusion plate 21 defines a lower sensing groove, and a lower sensor 22 is fixedly mounted in the lower sensing groove. The bottom of the grouting cavity 15 defines a first through-hole, through which the upper rebar 11 extends into the grouting cavity 15 and contacts the bottom of the extrusion plate 21. In this embodiment, the upper sensor 17 and the lower sensor 22 can be photoelectric sensors.

[0049] In this embodiment, after the upper steel bar 11 contacts the extrusion plate 21, it acts as a limiter on the extrusion plate 21, so that when the upper wall 3 continues to move downward, it can drive the annular plate 16 and the upper sensor 17 to move downward synchronously until they contact the lower sensor 22, thereby transmitting an electrical signal to the PLC controller 49, indicating that the upper steel bar 11 is connected to the upper wall 3 in place.

[0050] like Figure 6 As shown, two connecting columns 23 are fixedly installed on the top of the lower wall 2, and the outer walls of the two connecting columns 23 are provided with multiple fixing holes. Two connecting cavities 24 are provided in the upper wall 3, and the bottom ends of the two connecting cavities 24 are provided with second through holes. The two connecting columns 23 pass through the two second through holes and extend into the two connecting cavities 24 respectively. A grouting hole 25 is provided at the top of one of the connecting cavities 24. The multiple grouting cavities 15 and the multiple connecting cavities 24 are connected through connecting holes 26. Multiple lifting rings 27 are fixedly provided on the top of the upper wall 3.

[0051] In this embodiment, concrete mortar is poured into the grouting holes 25 , so that the concrete mortar flows into the grouting cavity 15 and the fixing holes due to its fluidity, thereby improving the stability of the upper wall 3 and the lower wall 2 after solidification.

[0052] like Figure 8 and Figure 9 As shown, the lifting mechanism includes a circular plate 35, which is slidably arranged in a circular groove 30. Four screws 31 are rotatably installed at the bottom of the circular groove 30. The screws 31 are threadedly connected to the circular plate 35. The top ends of the four screws 31 are rotatably installed on the lifting chamber 10. Every two adjacent screws 31 are connected by a transmission assembly. The transmission assembly includes two first synchronous pulleys 32. The two first synchronous pulleys 32 are respectively fixedly sleeved on the outside of the two adjacent screws 31. The two first synchronous pulleys 32 are connected by a first synchronous belt 33. A motor slot is provided at the bottom of the circular groove 30. A lifting motor 34 for driving one of the screws 31 to rotate is fixedly installed in the motor slot. Specifically, the lifting motor 34 can be controlled by a PLC controller 49.

[0053] In this embodiment, the lifting motor 34 drives one of the screws 31 to rotate, and then drives the other three screws 31 to rotate synchronously under the meshing action of multiple first synchronous pulleys 32 and multiple first synchronous belts 33, so that the circular plate 35 moves upward under the action of the thread. The entire lifting process is relatively stable and avoids jamming.

[0054] like Figure 13 and Figure 14As shown, the detachable mechanism includes a connecting bolt 48, two pins 47 are fixedly installed on the side of the lifting plate 36, two pin grooves are provided on the side of the lifting block 29, and the two pins 47 extend into the two pin grooves respectively. A threaded hole is provided on the side of the lifting block 29, and the connecting bolt 48 slides through the lifting plate 36 and extends into the threaded hole and is threadedly connected to the lifting block 29.

[0055] In this embodiment, the lifting plate 36 can be positioned by the pin connection function of the two pins 47 and the pin grooves, and then the lifting plate 36 and the lifting block 29 can be connected by the connection function of the connecting bolts 48.

[0056] like Figure 10 and Figure 11 As shown, the guide mechanism includes a guide plate 4, a flip groove is provided on the top of the lifting plate 36, a square groove 40 is provided on the bottom of the lifting plate 36, a rectangular groove 37 is provided on the lifting plate 36 between the flip groove and the square groove 40, a rotating shaft 38 is rotatably installed in the flip groove, one end of the rotating shaft 38 extends into the rectangular groove 37, the guide plate 4 is fixedly sleeved on the rotating shaft 38, and a control component for driving the rotating shaft 38 to rotate is provided in the square groove 40.

[0057] In this embodiment, the guide plate 4 is set to be flipped to a certain angle, and then guided to the hoisted upper wall 3 by its inclined surface, so that the first through hole at the lower part is aligned with the upper steel bar 11.

[0058] like Figure 10 、 Figure 11 and Figure 12 As shown, the control component includes a transmission shaft 41, which is rotatably installed in the square groove 40, and one end of the transmission shaft 41 extends into the rectangular groove 37. The transmission shaft 41 and the rotating shaft 38 are fixedly sleeved with a second synchronous pulley 42, and the two second synchronous pulleys 42 are connected by a second synchronous belt 43. A transmission gear 44 is fixedly installed on the transmission shaft 41, and a straight rack 45 is fixedly installed on the side of the lower wall 2. The straight rack 45 is meshed with the transmission gear 44, and an avoidance groove 46 adapted to the straight rack 45 is opened on one side of the square groove 40.

[0059] In this embodiment, when the lifting plate 36 moves upward, it can drive the transmission gear 44 to move upward synchronously. When it engages with the spur rack 45, it drives the transmission shaft 41 to rotate synchronously. Then, under the meshing action of the two second synchronous pulleys 42 and the second synchronous belt 43, it drives the rotating shaft 38 and the guide plate 4 to rotate synchronously by a certain angle, thereby realizing the guiding and limiting effect on the upper wall 3.

[0060] A test method for an assembled building structure performance test platform comprises the following steps:

[0061] S1. Guide and install the lower wall 2 on the top of the base plate 1 through multiple lower steel bars 5. Turn over the two support rods 8 so that their upper ends are placed in the U-shaped blocks 6 on the sides of the lower wall 2 and fix them with fixing bolts 9;

[0062] S2. The upper wall 3 is lifted to the top of the lower wall 2. The lifting motor 34 drives the screw 31 to rotate, causing the circular plate 35, the lifting block 29, and the lifting plate 36 to move synchronously. When the lifting plate 36 reaches a suitable position, the meshing action of the transmission gear 44 and the spur rack 45 drives the transmission shaft 41 to rotate, thereby causing the guide plate 4 to flip to an inclined state. When the upper wall 3 moves downward, the first through hole at the bottom thereof is aligned with the upper steel bar 11 through the guidance of the multiple guide plates 4.

[0063] S3: As the upper wall 3 continues to move downward, the upper steel bar 11 extends through the first through hole into the grouting cavity 15 and contacts the extrusion plate 21. When the upper wall 3 and the annular plate 16 continue to descend until the annular plate 16 is in contact with the extrusion plate 21, the upper sensor 17 and the lower sensor 22 contact each other, thereby sending an electrical signal to indicate that the upper steel bar 11 is in place with the upper wall 3. Then, the lifting is released, and the mass of the upper wall 3 is measured using the weighing plate 14.

[0064] S4. After the quality data monitoring of the upper wall 3 is completed, the rectangular plate 12, the upper steel bar 11, and the upper wall 3 are synchronously driven downward by the multiple electric cylinders 13 until the upper wall 3 falls to the top of the lower wall 2. The length of the upper steel bar 11 initially extending out of the lower wall 2 is recorded as x, and the distance the upper steel bar 11 is lowered by the electric cylinder 13 is recorded as y. The length of the upper steel bar 11 extending into the grouting cavity 15 is calculated as xy.

[0065] S5. Concrete mortar is poured into the connecting cavity 24 through the grouting hole 25. Its fluidity is used to make it flow into the grouting cavity 15 through the connecting hole 26. After solidification, it is connected to the upper steel bar 11. At the same time, the concrete mortar will flow into the fixing hole of the connecting column 23. After solidification, it is connected to the connecting column 23, thereby enhancing the stability of the wall after connection.

[0066] The working principle and usage process of the present invention: When in use, the lower wall 2 is installed on the top of the base plate 1 through the guidance of multiple lower steel bars 5, and the two support rods 8 are flipped over, and the upper ends of the two support rods 8 are flipped over to the two U-shaped blocks 6 on the side of the lower wall 2, and the support rods 8 are fixed by two fixing bolts 9.

[0067] The upper wall 3 is lifted to the top of the lower wall 2 through multiple lifting rings 27, and the lifting motor 34 drives one of the screws 31 to rotate, and then, under the meshing action of multiple first synchronous pulleys 32 and multiple first synchronous belts 33, drives the other three screws 31 to rotate synchronously, so that the circular plate 35 moves through the thread action. When the circular plate 35 moves, it can drive multiple lifting blocks 29 and multiple lifting plates 36 to move synchronously. When the lifting plate 36 moves to a suitable position, the transmission shaft 41 is driven to rotate through the meshing action of the transmission gear 44 and the spur rack 45, and then the meshing action of the two second synchronous pulleys 42 and the second synchronous belt 43 drives the rotating shaft 38 and the guide plate 4 to synchronously flip a certain angle, so that the multiple guide plates 4 are in an inclined state. When the upper wall 3 moves downward, the multiple first through holes at the bottom of the upper wall 3 can be aligned with the multiple upper steel bars 11 through the extrusion action with the inclined surfaces of the multiple guide plates 4.

[0068] The upper wall 3 continues to move downward, so that the multiple upper steel bars 11 extend into the multiple grouting chambers 15 through the multiple first through holes and contact the multiple extrusion plates 21 respectively. When the upper wall 3 continues to move downward, the upper steel bars 11 squeeze the extrusion plates 21, so that the extrusion plates 21, the sliding shaft 19, and the limit plate 20 remain stationary. When the upper wall 3 and the annular plate 16 continue to move downward until the annular plate 16 fits the extrusion plate 21, an electrical signal is sent under the action of the upper sensor 17 and the lower sensor 22, thereby prompting the staff that the connection between the upper steel bars 11 and the upper wall 3 is in place. At this time, the lifting of the upper wall 3 is released, so that the upper wall 3 squeezes the multiple upper steel bars 11, and the mass of the upper wall 3 is measured by the weighing plate 14.

[0069] When the wall quality data monitoring is completed, the rectangular plate 12, the multiple upper steel bars 11, and the upper wall 3 are driven to move downward synchronously by multiple electric cylinders 13 until the upper wall 3 falls to the top of the lower wall 2. Assuming that the initial length of the upper steel bar 11 extending outside the lower wall 2 is x, and the distance the electric cylinder 13 drives the upper steel bar 11 to descend is y, then the length of the upper steel bar 11 extending into the grouting cavity 15 is xy, thereby realizing the measurement of the length of the upper steel bar 11 extending into the grouting cavity 15.

[0070] Concrete mortar is poured into one of the connection cavities 24 through the grouting holes 25. Due to its fluidity, the concrete mortar flows through the connecting holes 26 into the grouting cavity 15. After solidification, it connects with the upper reinforcement 11, thereby improving the stability of the connection between the upper wall 3 and the lower wall 2. The concrete mortar also flows into the fixing holes of the connecting column 23. After solidification, it connects with the connecting column 23, further improving the stability of the wall connection. To ensure sufficient flow of the concrete mortar, the upper wall 3 can be appropriately vibrated.

[0071] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A test platform for the performance of assembled building structures, comprising a base plate (1), a lower wall (2), and an upper wall (3), characterized in that: The bottom plate (1) is movably connected to the lower wall (2) and fixed by a connecting mechanism. The connecting mechanism is used to support the lower wall (2). A lifting cavity (10) is provided in the lower wall (2). Three sliding holes are provided at the top of the lifting cavity (10). Upper steel bars (11) are slidably installed in the three sliding holes. The bottom ends of the three upper steel bars (11) extend into the lifting cavity (10) and are connected to a quality inspection mechanism. Three grouting cavities (15) are provided in the upper wall (3). The three grouting cavities (15) are respectively provided with the three The upper steel bar (11) is adapted to the position detection mechanism, the bottom of the lifting chamber (10) is provided with a circular groove (30), the side inner wall of the circular groove (30) is provided with a plurality of rectangular sliding holes (28), the plurality of rectangular sliding holes (28) are all slidably installed with lifting blocks (29) through a lifting mechanism, the sides of the plurality of lifting blocks (29) are all installed with lifting plates (36) through a detachable mechanism, and the tops of the plurality of lifting plates (36) are all provided with a guide mechanism, and the plurality of guide mechanisms enable the upper wall (3) to automatically align with the lower wall (2) when moving downward.

2. The prefabricated building structure performance test platform according to claim 1, characterized in that: The connecting mechanism comprises a plurality of lower steel bars (5), a plurality of lower steel bar grooves are provided on the top of the bottom plate (1), the lower parts of the plurality of lower steel bars (5) are fixedly arranged in the plurality of lower steel bar grooves, a plurality of upper steel bar grooves are provided on the bottom of the lower wall (2), the upper parts of the plurality of lower steel bars (5) extend into the plurality of upper steel bar grooves, two U-shaped blocks (6) are fixedly installed on the top of the bottom plate (1) and the side of the lower wall (2), a mounting shaft (7) is fixedly installed on the two U-shaped blocks (6) on the bottom plate (1), a support rod (8) is rotatably installed on the two mounting shafts (7), a mounting hole is provided on the two U-shaped blocks (6) on the lower wall (2), a fixing bolt (9) is passed through the mounting hole of each U-shaped block (6) on the lower wall (2), a nut is threadedly installed on each fixing bolt (9), and the upper end of the support rod (8) is rotatably connected to the fixing bolt (9) on the corresponding side.

3. The prefabricated building structure performance test platform according to claim 1, characterized in that: The quality inspection mechanism includes a weighing plate (14), a plurality of mounting grooves are provided at the bottom of the lifting chamber (10), electric cylinders (13) are fixedly installed in the plurality of mounting grooves, the movable ends of the plurality of electric cylinders (13) are fixedly connected to the bottom of the weighing plate (14), a rectangular plate (12) is fixedly installed on the top of the weighing plate (14), and the top of the rectangular plate (12) is fixedly connected to the bottom ends of the plurality of upper steel bars (11).

4. The prefabricated building structure performance test platform according to claim 1, characterized in that: The in-place detection mechanism comprises an upper sensor (17) and a lower sensor (22); an annular plate (16) is fixedly mounted on the top of the grouting chamber (15); an upper sensing groove is provided at the bottom end of the annular plate (16); the upper sensor (17) is fixedly mounted in the upper sensing groove; a sliding chamber (18) is provided in the upper wall (3); a sliding shaft (19) is slidably mounted in the annular plate (16); and the top end of the sliding shaft (19) extends to the sliding chamber (18). A limiting plate (20) is fixedly installed inside the grouting cavity (15), the bottom end of the sliding shaft (19) extends into the grouting cavity (15) and is fixedly installed with an extrusion plate (21), the top of the extrusion plate (21) is provided with a lower sensing groove, the lower sensor (22) is fixedly installed in the lower sensing groove, the bottom of the grouting cavity (15) is provided with a first through hole, the upper steel bar (11) extends into the grouting cavity (15) through the first through hole and contacts the bottom of the extrusion plate (21).

5. The prefabricated building structure performance test platform according to claim 4, characterized in that: Two connecting columns (23) are fixedly installed on the top of the lower wall (2), and the outer walls of the two connecting columns (23) are each provided with a plurality of fixing holes. Two connecting cavities (24) are provided in the upper wall (3), and the bottom ends of the two connecting cavities (24) are each provided with a second through hole. The two connecting columns (23) respectively pass through the two second through holes and extend into the two connecting cavities (24). A grouting hole (25) is provided at the top of one of the connecting cavities (24), and the plurality of grouting cavities (15) and the plurality of connecting cavities (24) are connected via a connecting hole (26). A plurality of lifting rings (27) are fixedly provided on the top of the upper wall (3).

6. The prefabricated building structure performance test platform according to claim 1, characterized in that: The lifting mechanism includes a circular plate (35), which is slidably arranged in the circular groove (30), and four screws (31) are rotatably installed on the bottom inner wall of the circular groove (30), and the screws (31) are threadedly connected to the circular plate (35). The top ends of the four screws (31) are rotatably installed on the top inner wall of the lifting chamber (10), and each two adjacent screws (31) are connected by a transmission assembly, and the transmission assembly includes two first synchronous pulleys (32), and the two first synchronous pulleys (32) are respectively fixedly sleeved on two of the screws (31). The two first synchronous pulleys (32) are connected by a first synchronous belt (33). A motor slot is opened at the bottom of the circular groove (30), and a lifting motor (34) for driving one of the screws (31) to rotate is fixedly installed in the motor slot.

7. The prefabricated building structure performance test platform according to claim 1, characterized in that: The detachable mechanism includes a connecting bolt (48), two pins (47) are fixedly installed on the side of the lifting plate (36), two pin grooves are provided on the side of the lifting block (29), and the two pins (47) extend into the two pin grooves respectively. A threaded groove is provided on the side of the lifting block (29), and the connecting bolt (48) slides through the lifting plate (36) and then extends into the threaded hole and is threadedly connected to the lifting block (29).

8. The prefabricated building structure performance test platform according to claim 1, characterized in that: The guide mechanism comprises a guide plate (4), a top of the lifting plate (36) is provided with a turnover groove, a bottom of the lifting plate (36) is provided with a square groove (40), a rectangular groove (37) is provided on the lifting plate (36) between the turnover groove and the square groove (40), a rotating shaft (38) is rotatably installed in the turnover groove, one end of the rotating shaft (38) extends into the rectangular groove (37), the guide plate (4) is fixedly sleeved on the rotating shaft (38), and a control component for driving the rotating shaft (38) to rotate is provided in the square groove (40).

9. The prefabricated building structure performance test platform according to claim 8, characterized in that: The control component includes a transmission shaft (41), which is rotatably mounted in the square groove (40), one end of the transmission shaft (41) extends into the rectangular groove (37), and the transmission shaft (41) and the rotating shaft (38) are both fixedly sleeved with a second synchronous pulley (42), and the two second synchronous pulleys (42) are connected by a second synchronous belt (43), a transmission gear (44) is fixedly mounted on the transmission shaft (41), a spur rack (45) is fixedly mounted on the side of the lower wall (2), and the spur rack (45) is meshed with the transmission gear (44), and an avoidance groove (46) adapted to the spur rack (45) is opened on one side of the square groove (40).

10. A test method for the prefabricated building structure performance test platform according to any one of claims 1 to 9, characterized in that: The steps include: S1. Guide and install the lower wall (2) on the top of the bottom plate (1) through multiple lower steel bars (5), turn over the two support rods (8) so that their upper ends are respectively placed in the U-shaped blocks (6) on the sides of the lower wall (2), and fix them with fixing bolts (9); S2. The upper wall (3) is hoisted to the top of the lower wall (2), and the lifting motor (34) drives the screw (31) to rotate, so that the circular plate (35), the lifting block (29) and the lifting plate (36) move synchronously. When the lifting plate (36) reaches a suitable position, the transmission shaft (41) is driven to rotate by the meshing action of the transmission gear (44) and the spur rack (45), thereby causing the guide plate (4) to flip to an inclined state, so that when the upper wall (3) moves downward, the first through hole at the bottom thereof is aligned with the upper steel bar (11) through the guiding action of the multiple guide plates (4); S3, when the upper wall (3) continues to move downward, the upper steel bar (11) extends through the first through hole into the grouting cavity (15) and contacts the extrusion plate (21). When the upper wall (3) and the annular plate (16) continue to descend until the annular plate (16) and the extrusion plate (21) are in contact, the upper sensor (17) and the lower sensor (22) contact each other, thereby sending an electrical signal to prompt that the upper steel bar (11) and the upper wall (3) are connected in place. Then, the lifting is released and the weight of the upper wall (3) is measured using the weighing plate (14); S4. After the quality data monitoring of the upper wall (3) is completed, the rectangular plate (12), the upper steel bar (11) and the upper wall (3) are driven by multiple electric cylinders (13) to move downward synchronously until the upper wall (3) falls to the top of the lower wall (2). The length of the upper steel bar (11) initially extending out of the lower wall (2) is recorded as x, and the distance the electric cylinder (13) drives the upper steel bar (11) to descend is recorded as y, thereby calculating the length of the upper steel bar (11) extending into the grouting cavity (15) as xy; S5. Concrete mortar is poured into the connection cavity (24) through the grouting hole (25). The concrete mortar is made to flow into the grouting cavity (15) through the connecting hole (26) by utilizing its fluidity. After solidification, the concrete mortar is connected to the upper steel bar (11). At the same time, the concrete mortar flows into the fixing hole of the connection column (23). After solidification, the concrete mortar is connected to the connection column (23), thereby enhancing the stability of the wall after connection.

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