Locking device of foundation pit supporting system

Abstract

The invention provides a locking device of a foundation pit supporting system, which comprises a locking device used for locking a first force transmission seat on a steel sheet pile; the locking device comprises a mounting frame, a lifting part, a locking part and an adjusting part, the mounting frame is vertically movably arranged through the lifting part, the locking part is arranged on the mounting frame through the adjusting part, the mounting frame comprises an adjusting beam and a mounting beam, the lifting part is mounted on the adjusting beam, and the locking part is mounted on the adjusting beam. The mounting beam is fixedly mounted below the adjusting beam through a connecting frame, and the adjusting part is arranged between the adjusting beam and the mounting beam. When the device is used, the first force transmission base can be conveniently locked on the steel sheet pile, efficiency is high, operation is easy, and the labor amount of workers is small.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of foundation pit support, in particular to a locking device of a foundation pit support system. BACKGROUND

[0002] Sometimes, the foundation pit engineering is set up in a crowded road section with many surrounding buildings and roads, which is easy to cause the settlement, cracking or local damage of the surrounding buildings and municipal pipelines during the foundation pit construction process, so the construction quality and deformation control have very high requirements. In the related technology, the underground continuous wall and the horizontal support are often used to form a retaining structure to effectively control the influence of the foundation pit excavation on the surrounding pipelines and buildings. The safety and deformation control effect of the foundation pit is closely related to the reasonable design of the retaining structure, and the safety and engineering cost are two key indicators that need to be considered comprehensively when designing the retaining structure.

[0003] The concrete support and the steel support are commonly used foundation pit retaining structures, and the load condition is closely related to the size of the axial force acting on the support during the excavation process. Since the size of the support load changes with the change of the excavation process, it is not only helpful to reduce the influence of the foundation pit excavation on the surrounding buildings, but also plays a crucial role in the safety of the foundation pit construction to clarify the change and correspondingly compensate the axial force of the steel support.

[0004] According to the Chinese invention patent CN117107781B "Steel support system for foundation pit support", a steel support system is disclosed for supporting the foundation pit in the foundation pit engineering. Since the weight of the steel support system is large, in order to facilitate the installation of the steel support system, an operation simple, installation convenient, high efficiency and less labor support device is needed. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a locking device of a foundation pit support system, which solves the technical problems of the large weight and inconvenient installation of the steel support system in the prior art.

[0006] To achieve the above-mentioned purposes and other related purposes, the present application provides a locking device of a foundation pit support system, comprising: The locking device is used for locking the first force transmission seat on the steel sheet pile; The locking device comprises a mounting frame, a lifting part, a locking part and an adjusting part, the mounting frame is movably arranged up and down through the lifting part, the locking part is arranged on the mounting frame through the adjusting part, the mounting frame comprises an adjusting beam and a mounting beam, the lifting part is mounted on the adjusting beam, the mounting beam is fixedly mounted below the adjusting beam through a connecting frame, and the adjusting part is arranged between the adjusting beam and the mounting beam.

[0007] Thus, the two bolts on both sides can be locked into the steel sheet pile through the locking device, the work efficiency is improved, the height of the locking device is adjusted by the lifting part, the spacing between the locking parts is adjusted by the adjusting part, and the locking device is suitable for foundation pits with different heights and different widths.

[0008] Optionally, the adjusting part comprises a first motor, a second bidirectional screw rod and a moving frame, the first motor is fixedly installed on the adjusting beam, the second bidirectional screw rod is rotatably installed on the lower side of the adjusting beam, and the first motor drives the second bidirectional screw rod to rotate through a synchronous belt wheel mechanism; The moving frame is symmetrically arranged in an L shape and comprises a connecting plate arranged vertically and a moving plate fixedly arranged on the lower side of the connecting plate, the top of the connecting plate is slidably arranged below the adjusting beam through a linear sliding rail sliding block mechanism, and is threadedly connected with both ends of the second bidirectional screw rod, respectively, when the second bidirectional screw rod rotates, the moving frame is driven to move closer to or away from each other on the second bidirectional screw rod, and the lower side of the moving frame is movably arranged above the mounting beam through a linear sliding rail sliding block mechanism. The first motor drives the second bidirectional screw rod to rotate, which can drive the moving frame to move closer to or away from each other on the mounting frame, so as to be suitable for foundation pits with different widths.

[0009] Optionally, the locking part comprises a second driving mechanism and a bolt clamping seat, the bolt clamping seat is slidably arranged above the moving plate through a linear sliding rail mechanism, and is located at one end close to the connecting plate, the bolt clamping seat is hollowly arranged and has a bolt placing groove in the middle, and the upper side of the bolt placing groove penetrates the upper side of the bolt clamping seat. The bolt placing groove of the bolt clamping seat can facilitate the locking of the bolt into the threaded hole of the steel sheet pile under the action of the second driving mechanism.

[0010] Optionally, the second driving mechanism comprises a second motor, a gear reversing device, a driving rod, a second spline shaft, a second spline shaft sleeve, a third motor, a third bidirectional screw rod and a push plate, the axes of the second spline shaft, the second spline shaft sleeve, the driving rod and the third bidirectional screw rod are arranged in parallel; The second motor is fixedly installed on the mounting beam through a second motor seat and is located on the upper side of the moving plate, the gear reversing device is fixedly installed on the second motor seat and is located between the second motor seat and the moving plate, and the output shaft of the second motor is fixedly connected with the input shaft of the gear reversing device. The second motor and the gear reversing device can drive two driving rods to rotate at the same time, thereby driving the second spline shaft and the second spline shaft sleeve on both sides to rotate at the same time and in opposite directions, and the bolts on both sides can be locked at the same time.

[0011] Optionally, the mounting beam is symmetrically and fixedly provided with a fixed block, the drive rod is symmetrically arranged between the fixed block and the gear reverser, and one end is rotatably arranged in the fixed block and the other end is fixedly connected with the output shaft of the gear reverser; The third bidirectional screw rod is rotatably arranged between the fixed blocks, the third motor is fixedly arranged on the mounting beam, the rotation of the third bidirectional screw rod is driven by the third motor, and the push plate is symmetrically arranged at two ends of the third bidirectional screw rod in a threaded manner and moves away from or approaches each other when the third bidirectional screw rod rotates. Through the third bidirectional screw rod, the push plate can move away from or approach each other on the third bidirectional screw rod, and then the second spline shafts on both sides are simultaneously axially moved in the respective second spline shaft sleeves.

[0012] Optionally, the second spline shaft sleeve is rotatably arranged on the fixed block through a bearing, the second spline shaft is inserted and matched in the second spline shaft sleeve, and the second spline shaft is coaxially and fixedly provided with a locking column at one end close to the bolt clamping seat and rotatably arranged on the push plate at the other end; The locking column is clearance-fitted in the bolt placing groove, one end of the locking column close to the bolt placing groove is provided with a locking head matched with the bolt, and the locking column is driven to rotate in the circumferential direction and axially move in the bolt placing groove by the second driving mechanism. The third motor drives the third bidirectional screw rod, which can drive the rotating second spline shaft to move in the axial direction, so that the locking column can push the bolt out of the bolt placing groove to the outside of the steel sheet pile and screw the bolt into the threaded hole of the steel sheet pile.

[0013] Optionally, one end of the bolt clamping seat close to the second driving mechanism is provided with an elastic mechanism, the elastic mechanism comprises a movable block, a first elastic telescopic column and a chuck, two ends of the first elastic telescopic column are fixedly connected with the bolt clamping seat and the movable block respectively, the chuck is fixedly arranged on the locking column, the movable block is provided with a clamping groove, and the chuck is clearance-fitted in the clamping groove. When the locking column axially moves, the chuck pushes the movable block to move, so that the bolt clamping seat moves on the moving plate. By using the elastic mechanism, the bolt clamping seat can move together when the second spline shaft axially moves, the bolt clamping seat is tightly pressed on the first force transmission seat, the second spline shaft can still axially move after the bolt clamping seat is tightly pressed by the action of the elastic telescopic column, the bolt in the bolt clamping seat is pushed out of the bolt placing groove and screwed into the threaded hole of the steel sheet pile, the deviation of the bolt axial position can be reduced, and the bolt locking is facilitated.

[0014] Optionally, a clamping mechanism is further provided below the movable plate. The clamping mechanism includes a plug-in plate and a fourth bidirectional lead screw. The plug-in plate is movably disposed below the movable plate, and the moving direction of the plug-in plate is the same as the moving direction of the bolt holder. The fourth bidirectional lead screw is rotatably disposed below the mounting beam, and the rotation of the fourth bidirectional lead screw is driven by the third motor. Connecting columns are symmetrically provided at both ends of the fourth bidirectional lead screw through threaded engagement. The plug-in plate and the connecting columns are connected by a second elastic telescopic column. Optionally, the plug-in board is provided with magnets.

[0015] The plug-in plate has a placement surface that can accommodate the first force transmission seat, allowing the first force transmission seat to be stably placed on the plug-in plate. Furthermore, the use of magnets prevents the first force transmission seat from shifting or falling during movement. The first force transmission seat is located on the front side of the bolt holder. After the first force transmission seat is pressed against the sheet pile, the bolt holder is then pressed against the first force transmission seat by the drive of the third motor. Through the second elastic telescopic column, the movement of the second spline shaft driven by the third motor remains unaffected after the first force transmission seat is pressed against the sheet pile.

[0016] Optionally, the bolt placement groove has mounting grooves on both its side and bottom surfaces. An elastic plate is installed within each mounting groove, and the elastic plate is arc-shaped, facing the axis of the bolt placement groove, with its end pointing towards the side of the pit to support the bolt and ensure that the bolt's axis is collinear with the axis of the locking column. This reduces deviations in the bolt's axis position and facilitates the bolt's tightening onto the sheet pile.

[0017] The beneficial effects of this invention are as follows: When using this invention, it is easy to lock the first force transmission seat onto the sheet pile, which is efficient, simple to operate, and requires less labor from workers. Attached Figure Description

[0018] Figure 1 The diagram shows the installation of the present invention on a gantry crane.

[0019] Figure 2 Displayed as Figure 1 A structural diagram from another location.

[0020] Figure 3 The diagram shown is a structural schematic of the locking device in this invention.

[0021] Figure 4 Displayed as Figure 3 An enlarged schematic diagram of point A in the diagram.

[0022] Figure 5 Displayed as Figure 3 Enlarged diagram of point B.

[0023] Figure 6Displayed as Figure 3 A schematic diagram of the structure after removing some components.

[0024] Figure 7 Displayed as Figure 1 A schematic diagram of the gripping device.

[0025] Figure 8 Displayed as Figure 7 A cross-sectional view of the gripping device. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] Please see Figures 1 to 8 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0028] Chinese invention patent CN117107781B, "A Steel Support System for Foundation Pit Support," discloses a steel support system including a steel support 23, a first force transmission seat 21, a steel waler 2224, and a second force transmission seat 24. The first force transmission seat 21 supports the steel waler, and the second force transmission seat 24 is fixedly installed on the steel waler. The steel support 23 is then supported between the second force transmission seats. To facilitate the installation of the steel support system and achieve better support, steel sheet piles 22 are inserted into the side of the foundation pit 1. The first force transmission seat 21 is fixedly installed on the steel sheet piles, so that the steel waler 2224 is in close contact with the steel sheet piles 22, and the steel support 23 supports the steel sheet piles 22, thereby better supporting the sidewall of the foundation pit 1.

[0029] like Figures 1-8As shown, a locking device for a foundation pit support system includes: a gantry crane with a main beam 11, secondary beams 12 fixedly and parallel to one side of the main beam 11, an mounting plate 121 fixedly installed on the secondary beam 12, and a locking device 2 provided on the mounting plate 121. The locking device 2 fixes the first force transmission seat 21 to the steel sheet pile 22. The main beam 11 has a traveling lifting mechanism 13. A gripping device 3 for gripping steel support 23 is fixedly installed below the steel cable of the traveling lifting mechanism 13. After the gripping device 3 grips the steel support 23, the traveling lifting mechanism 13 moves the steel support 23 to the top of the foundation pit 1 and places the steel support 23 between the second force transmission seats 24. In this embodiment, the gripping device 3 includes a base 31, with gripping grooves 311 on both sides of the base 31. A hydraulic motor 312, a first connecting part 313, a gripper mounting seat 314, and grippers 315 are mounted on the base 31. The hydraulic motor 312 is fixedly mounted in the middle of the base 31, with its output end 3121 facing downwards. The gripper mounting seats 314 are symmetrically arranged and slidably mounted in the gripping grooves 311 on both sides of the base 31. The grippers 315 are arranged in pairs on the gripper mounting seats 314. Driven by the hydraulic motor 312, the grippers 315 move closer or further apart on the gripper mounting seats 314 through the first connecting part 313, thereby achieving the gripping and release of the steel support 23.

[0030] Specifically, the first connecting part 313 includes a first spline shaft 3131 and a first spline shaft sleeve 3132. The first spline shaft sleeve 3132 is horizontally and rotatably mounted on the base 31 via a rolling bearing 3133. The first spline shaft sleeve 3132 is located below the hydraulic motor 312. The axis of the first spline shaft sleeve 3132 is perpendicular to the axis of the output end 3121 of the hydraulic motor 312. The first spline shaft sleeve 3132 and the hydraulic motor 312 are meshed by a bevel gear. The hydraulic motor 312 drives the first spline shaft sleeve 3132 to rotate.

[0031] The first spline shaft 3131 is symmetrically arranged, with one end inserted into and engaged in the first spline shaft sleeve 3132, and the other end rotatably mounted in the jaw mounting seat 314.

[0032] The gripper mounting base 314 is slidably fitted in the gripping groove 311 via the mounting block 3141. The sliding direction is the same as the axial direction of the first spline shaft 3131. A first bidirectional lead screw 3142 is rotatably mounted in the gripper mounting base 314. The axis of the first bidirectional lead screw 3142 is perpendicular to the axis of the first spline shaft 3131. The middle part of the first bidirectional lead screw 3142 meshes with the end of the first spline shaft 3131 via bevel gears. Pairs of grippers 315 are screwed onto the two ends of the first bidirectional lead screw 3142 respectively. When the first spline shaft 3131 rotates, it can drive the first bidirectional lead screw 3142 to rotate in the gripper mounting base 314, thereby causing the pairs of grippers 315 to move closer or further apart, thus gripping or releasing the steel support 23.

[0033] The gripper 315 is arranged in an inverted L-shape. The upper end of the gripper 315 is screwed onto the first bidirectional lead screw 3142, and the lower side of the upper end is in contact with the bottom of the gripping groove 311. The side of the gripper 315 adjacent to the gripper has an arc-shaped clamp 3151 that matches the diameter of the steel support 23. In this embodiment, the gripper 315 is also equipped with a pushing mechanism 316. The pushing mechanism 316 is used to push the force ring 231 of the steel support 23, so that the force ring 231 moves axially, thereby adjusting the length of the steel support 23 and making the steel support 23 play a better supporting role.

[0034] Specifically, the pushing mechanism 316 is installed on one side of the base 31. The pushing mechanism 316 includes a fixed plate 3161, an electric push rod 3162, and a plug-in frame 3163. The fixed plate 3161 and the plug-in frame 3163 are both arranged in an n-shape. The electric push rod 3162 is fixedly installed between the fixed plate 3161 and the plug-in frame 3163. The upper side of the fixed plate 3161 is fixedly connected to the gripper mounting seat 314, and the lower end is slidably fitted to the two grippers 315 facing the hydraulic motor 312. The upper end of the plug-in frame 3163 is slidably fitted to the base 31. The plug-in frame 3163 has a downwardly positioned slot 3164. During the clamping process of the steel support 23, the slot 3164 is inserted into the force ring 231 of the steel support 23.

[0035] When it is necessary to push the force ring 231 to adjust the length of the steel support 23, the gripper 315 always clamps the steel support 23. The force ring 231 is pushed by the electric push rod 3162. When the force ring 231 is under force, the length of the steel support 23 extends. Under the action of the first spline shaft 3131 and the first spline shaft sleeve 3132, the gripper mounting seat 314 can move synchronously during the clamping process. A return spring 3143 is sleeved on the outside of the mounting block 3141 on the side without the push mechanism 316. The two ends of the return spring 3143 are fixedly connected to the gripper mounting seat 314 and the base 31. After the steel support 23 is released, the gripper mounting seat 314 can be restored to the initial position by the return spring 3143.

[0036] Specifically, a limit block 3152 is provided on the gripper 315 near the fixed plate 3161, and a limit groove 31611 is provided on the fixed plate 3161, and the limit block 3152 moves within the limit groove 31611.

[0037] Specifically, a guide post 3144 is provided on the gripper mounting base 314, and the gripper 315 is inserted into and slidably engaged with the guide post 3144.

[0038] Specifically, a fixing post 317 is provided on the base 31, and the fixing post 317 is fixedly connected to the steel cable 131.

[0039] In this embodiment, the locking device 2 includes a mounting frame 25, a lifting part 26, a locking part 27, and an adjusting part 28. The mounting frame 25 is movably positioned below the mounting plate 121 via the lifting part 26. The lifting part 26 includes a fourth motor 261 and a screw 262. The fourth motor 261 is fixedly mounted on the mounting frame 25, and the screw 262 is vertically rotatably mounted on the upper side of the mounting frame 25. The rotation of the screw 262 is driven by the fourth motor 261. The screw 262 and the mounting plate 121 are threadedly engaged. When the fourth motor 261 drives the screw 262 to rotate, the screw 262 screwed onto the mounting plate 121 can move in the vertical direction, thereby allowing the mounting frame 25 to move in the vertical direction for height adjustment.

[0040] The locking part 27 is mounted on the mounting frame 25 via the adjusting part 28. The mounting frame 25 includes an adjusting beam 251 and a mounting beam 252. The mounting beam 252 is fixedly mounted below the adjusting beam 251 via a connecting frame 253. The adjusting part 28 is located between the adjusting beam 251 and the mounting beam 252. The adjusting part 28 includes a first motor 281, a second bidirectional lead screw 282, and a moving frame 283. The second bidirectional lead screw 282 is rotatably mounted below the adjusting beam 251. The first motor 281 is fixedly mounted on the adjusting beam 251. The first motor 281 drives the second bidirectional lead screw 282 to rotate via a synchronous belt pulley mechanism 2811. The movable frame 283 is L-shaped and symmetrically arranged on the second bidirectional lead screw 282. The movable frame 283 includes a vertically arranged connecting plate 2831 and a horizontally fixed movable plate 2832 below the connecting plate 2831. The top of the connecting plate 2831 is slidably arranged on the lower side of the adjusting beam 251 through a linear slide rail slider mechanism and is screwed to the second bidirectional lead screw 282. The lower side of the movable plate 2832 is movably arranged on the upper side of the mounting beam 252 through a linear slide rail slider mechanism. When the second bidirectional lead screw 282 rotates, it drives the movable frame 283 to move closer to or further away from each other between the adjusting beam 251 and the mounting beam 252.

[0041] In this embodiment, the locking part 27 includes a second driving mechanism 271 and a bolt holder 272. The bolt holder 272 is slidably disposed above the moving plate 2832 by a linear slide rail mechanism and is driven to move by the second driving mechanism 271. It is located at one end close to the connecting plate 2831. The bolt holder 272 is hollow and has a bolt placement groove 2722. The upper side of the bolt placement groove 2722 passes through the upper side of the bolt holder 272.

[0042] Specifically, the bolt placement groove 2722 has mounting grooves 2723 on both its side and bottom. An elastic plate 2724 is installed in the mounting groove 2723. The elastic plate 2724 is arranged in an arc shape facing the axis of the bolt placement groove 2722, and its end points to the side of the pit to support the bolt 29. This makes the axis of the bolt 29 collinear with the axis of the locking post 2711, which facilitates the engagement of the locking post 2711 and the bolt 29.

[0043] In this embodiment, the second drive mechanism 271 includes a second motor 2712, a gear commutator 2713, a drive rod 2714, a second spline shaft 2715, a second spline shaft sleeve 2716, a third motor 2717, a third bidirectional lead screw 2718, and a push plate 2719. The axes of the second spline shaft 2715, the second spline shaft sleeve 2716, the drive rod 2714, and the third bidirectional lead screw 2718 are all arranged in parallel.

[0044] Specifically, the second motor 2712 is fixedly mounted on the mounting beam 252 via the second motor base 27121. The second motor 2712 is located above the moving plate 2832. The gear commutator 2713 is a T-shaped commutator, fixedly mounted on the second motor base 27121, located below the second motor 2712. The output shaft of the second motor 2712 is fixedly connected to the input shaft of the gear commutator 2713. Fixed blocks 2521 are symmetrically and fixedly mounted on the mounting beam 252. The drive rod 2714 is symmetrically and rotatably arranged between the gear commutator 2713 and the fixed blocks 2521. One end of the drive rod 2714 is rotatably mounted in the fixed block 2521, and the other end is fixedly connected to the output shaft of the gear commutator 2713.

[0045] Specifically, the third motor 2717 is fixedly mounted on the mounting beam 252, and the third bidirectional lead screw 2718 is rotatably mounted between two fixed blocks 2521 via bearings. The rotation of the third bidirectional lead screw 2718 is driven by the third motor 2717. The push plates 2719 are symmetrically fitted at both ends of the third bidirectional lead screw 2718 via threads. When the third bidirectional lead screw 2718 rotates, the two push plates 2719 move closer or further away at the same time.

[0046] Specifically, the second splined bushing 2716 is rotatably mounted on the fixed block 2521 via a bearing. The second splined shaft 2715 is fitted inside the second splined bushing 2716. One end of the second splined shaft 2715 is rotatably mounted with the push plate 2719, and the other end has a locking pin 2711 coaxially fixed. The locking pin 2711 is clearance-fitted into the bolt placement groove 2722 of the bolt holder 272. The end of the locking pin 2711 located in the bolt placement groove 2722 has a locking head that mates with the bolt 29. The second drive mechanism 271 can drive the locking pin 2711 to rotate circumferentially and move axially within the bolt placement groove 2722, thereby locking the bolt 29 and the first force transmission seat 21 onto the sheet pile 22.

[0047] Specifically, when multiple bolts 29 need to be tightened simultaneously on the same side, multiple second spline shaft sleeves 2716 and second spline shafts 2715 can be set up. The second spline shaft sleeves 2716 are connected by a synchronous belt pulley mechanism so that the second spline shafts 2715 rotate synchronously.

[0048] In this embodiment, an elastic mechanism is provided at one end of the bolt holder 272 near the second drive mechanism 271. The elastic mechanism includes a movable block 2731, a first elastic telescopic column 2732, and a chuck 2733. Four first elastic telescopic columns 2732 are provided and are evenly distributed circumferentially between the end of the bolt holder 272 and the movable block 2731. The chuck 2733 is fixedly installed on the locking column 2711. The movable block 2731 has a slot 2734. The chuck 2733 is fitted and inserted into the slot 2734. When the locking column 2711 moves axially, the chuck 2733 pushes the movable block 2731 to move, thereby pushing or pulling the bolt holder 272 to move on the moving plate 2832.

[0049] In this embodiment, a clamping mechanism 274 is also provided below the movable plate 2832. The clamping mechanism 274 includes a plug plate 2741 and a fourth bidirectional lead screw 2742. The plug plate 2741 is movably disposed below the movable plate 2832. The moving direction of the plug plate 2741 is the same as the moving direction of the bolt holder 272. The fourth bidirectional lead screw 2742 is rotatably disposed below the mounting beam 252. The rotation of the fourth bidirectional lead screw 2742 is driven by the third motor 2717 and the synchronous belt pulley mechanism. The two ends of the fourth bidirectional lead screw 2742 are symmetrically provided with connecting posts 2743 through threaded engagement. The plug plate 2741 and the connecting posts 2743 are connected by the second elastic telescopic post 2744.

[0050] Specifically, the outward-facing side of the plug plate 2741 has a mating surface that engages with the first force transmission seat 21, which supports the first force transmission seat 21 in front of the bolt holder 272, so that the axis of the mounting hole 211 on the first force transmission seat 21 is collinear with the axis of the locking pin 2711. A magnet 2746 is also provided in the mating surface 2745 to further attract the first force transmission seat 21 and prevent the first force transmission seat 21 from shifting during movement.

[0051] Using the first elastic telescopic column 2732 and the second elastic telescopic column 2744, after the first force transmission seat 21 is pressed against the sheet pile 22 and the bolt holder 272 is pressed against the first force transmission seat 21, the third motor 2717 can continuously drive the push plate 2719 and the connecting column 2743 to move to both sides, so that the bolt 29 passes through the mounting hole 211 of the first force transmission seat 21 and is locked in the threaded hole 221 on the sheet pile 22.

[0052] In this embodiment, a support platform 122 is horizontally suspended on the sub-beam 12. The support platform 122 is located below the locking device 2 and the gripping device 3. The support platform 122 is used to place the first force transmission seat 21 and the bolt 29. The worker stands on the support platform 122, puts the bolt 29 into the bolt holder 272, places the first force transmission seat 21 on the plug plate 2741, and then controls the start and stop of the locking device 2 and the gripping device 3. At the same time, the position of the steel support 23 is adaptively adjusted so that the steel support 23 can fall into the second force transmission seat 24.

[0053] In order to reduce the swaying of the support platform 122, the support platform 122 is rigidly connected to the sub-beam 12.

[0054] Working principle: Evenly spaced threaded holes are drilled at the locations where sheet piles require support, and the sheet piles are inserted into the sidewalls of the foundation pit, ensuring they fit snugly against the pit walls. The second force transmission seat is then fixedly installed on the steel waler. The required number of bolts and the first force transmission seat are placed on a support platform. The gantry crane of this invention is then erected above the foundation pit. The support platform has a remote control for operating this invention. Workers stand on the support platform and manually add the first force transmission seats and bolts on both sides during the locking process. Through the locking mechanism, the first force transmission seats are locked onto the sheet piles one by one. The steel waler with the second force transmission seat installed is then hoisted onto the first force transmission seat. The steel support is then lifted and transported using a grabbing device. While the steel support is being transported between the second force transmission seats, the worker controls the position of the steel support, ensuring it falls between the second force transmission seats. Then, the force-bearing ring of the steel support is pushed by a pushing mechanism, causing the steel support to press tightly against the second force transmission seats, thereby providing support for the foundation pit behind the sheet piles.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A locking device for a foundation pit support system, characterized in that, The locking device is used to lock the first force transmission seat onto the sheet pile; The locking device includes a mounting frame, a lifting part, a locking part, and an adjusting part. The mounting frame is movably mounted up and down via the lifting part. The locking part is mounted on the mounting frame via the adjusting part. The mounting frame includes an adjusting beam and a mounting beam. The lifting part is mounted on the adjusting beam. The mounting beam is fixedly mounted below the adjusting beam via a connecting frame. The adjusting part is located between the adjusting beam and the mounting beam.

2. The locking device for the foundation pit support system according to claim 1, characterized in that: The adjustment unit includes a first motor, a second bidirectional lead screw, and a moving frame. The first motor is fixedly mounted on the adjustment beam, and the second bidirectional lead screw is rotatably mounted on the lower side of the adjustment beam. The first motor drives the second bidirectional lead screw to rotate through a synchronous belt pulley mechanism. The movable frame is arranged symmetrically in an L-shape, including a vertically arranged connecting plate and a horizontally fixed movable plate below the connecting plate. The top of the connecting plate is slidably disposed below the adjusting beam through a linear slide rail slider mechanism, and is respectively threadedly connected to both ends of the second bidirectional lead screw. When the second bidirectional lead screw rotates, it drives the movable frame to move closer or further away from each other on the second bidirectional lead screw. The lower side of the movable frame is movably disposed above the mounting beam through the linear slide rail slider mechanism.

3. The locking device for the foundation pit support system according to claim 3, characterized in that: The locking part includes a second drive mechanism and a bolt holder. The bolt holder is slidably disposed above the moving plate via a linear slide rail mechanism, located at one end near the connecting plate. The bolt holder is hollow and has a bolt placement groove in the middle. The upper side of the bolt placement groove extends through the upper side of the bolt holder.

4. The locking device for the foundation pit support system according to claim 3, characterized in that: The second drive mechanism includes a second motor, a gear commutator, a drive rod, a second splined shaft, a second splined shaft sleeve, a third motor, a third double-acting lead screw, and a push plate. The axes of the second splined shaft, the second splined shaft sleeve, the drive rod, and the third double-acting lead screw are all arranged in parallel. The second motor is fixedly mounted on the mounting beam via a second motor mount and is located on the upper side of the movable plate. The gear commutator is fixedly mounted on the second motor mount and is located between the second motor mount and the movable plate. The output shaft of the second motor is fixedly connected to the input shaft of the gear commutator.

5. The locking device for the foundation pit support system according to claim 4, characterized in that: The mounting beam is symmetrically and fixedly provided with fixing blocks, and the drive rod is symmetrically arranged between the fixing blocks and the gear commutator, with one end rotatably disposed in the fixing block and the other end fixedly connected to the output shaft of the gear commutator. The third bidirectional lead screw is rotatably mounted between the fixed blocks, and the third motor is fixedly mounted on the mounting beam. The rotation of the third bidirectional lead screw is driven by the third motor. The push plates are symmetrically arranged at both ends of the third bidirectional lead screw through threaded engagement, and move closer or further apart from each other when the third bidirectional lead screw rotates.

6. The locking device for the foundation pit support system according to claim 5, characterized in that: The second splined shaft sleeve is rotatably mounted on the fixed block via a bearing. The second splined shaft is inserted into the second splined shaft sleeve. A locking post is coaxially fixed at one end of the second splined shaft near the bolt seat, and the other end is rotatably mounted on the push plate. The locking pin is inserted into the bolt placement groove with a gap. The end of the locking pin near the bolt placement groove has a locking head that engages with the bolt. The locking pin is driven to rotate circumferentially and move axially within the bolt placement groove by the second driving mechanism.

7. The locking device for the foundation pit support system according to claim 6, characterized in that: An elastic mechanism is provided at one end of the bolt holder near the second drive mechanism. The elastic mechanism includes a movable block, a first elastic telescopic column, and a chuck. The two ends of the first elastic telescopic column are respectively fixedly connected to the bolt holder and the movable block. The chuck is fixedly installed on the locking column. The movable block has a slot, and the chuck is fitted and inserted into the slot. When the locking column moves axially, the chuck pushes the movable block to move, thereby pushing or pulling the bolt holder to move on the moving plate.

8. The locking device for the foundation pit support system according to claim 6, characterized in that: A clamping mechanism is also provided below the movable plate. The clamping mechanism includes a plug-in plate and a fourth bidirectional lead screw. The plug-in plate is movably disposed below the movable plate. The moving direction of the plug-in plate is the same as the moving direction of the bolt holder. The fourth bidirectional lead screw is rotatably disposed below the mounting beam. The rotation of the fourth bidirectional lead screw is driven by the third motor. The two ends of the fourth bidirectional lead screw are symmetrically provided with connecting columns through threaded engagement. The plug-in plate and the connecting columns are connected by a second elastic telescopic column.

9. The locking device for the foundation pit support system according to claim 7, characterized in that: The connector board is equipped with magnets.

10. The locking device for the foundation pit support system according to claim 7, characterized in that: The bolt placement groove has mounting grooves on both its side and bottom. An elastic plate is installed in the mounting groove. The elastic plate is arranged in an arc shape facing the axis of the bolt placement groove, and its end points to the side of the pit to support the bolt, so that the axis of the bolt is collinear with the axis of the locking column.

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