Self-locking hydraulic lifting device and method of use thereof

Abstract

The application provides a self-locking hydraulic jacking device and a use method thereof, and belongs to the technical field of heavy load lifting equipment. The hydraulic jacking unit is used for hydraulic lifting operation on the pressure bearing plate. After the pressure bearing plate is lifted to a preset height, the first lock body unit, the second lock body unit, the third lock body unit and the fourth lock body unit form a multiple interlocking mechanical safety bearing state, so as to provide mechanical locking protection independent of the power source for the hydraulic jacking unit, and the hydraulic system pressure maintaining is not needed. The inherent risk of low safety redundancy and dependence on system pressure maintaining in the prior art is effectively solved, and the safety guarantee is provided for various high-safety construction heavy load lifting operations including hanging basket jacking.

Description

Technical Field

[0001] This invention relates to the field of heavy-duty lifting equipment technology, specifically to a self-locking hydraulic jacking device and its usage method. Background Technology

[0002] In the field of vertical lifting and safety locking of heavy-duty equipment, hydraulic lifting systems are widely used due to their large lifting capacity and stable control. However, current mainstream hydraulic lifting devices generally suffer from a fundamental safety defect: maintaining their lifting state is highly dependent on the continuous pressure holding of the hydraulic system itself. In actual operation, hydraulic pipelines may leak due to aging or vibration, hydraulic valves may fail, or the power system may experience sudden malfunctions. These can all lead to system depressurization, causing an instantaneous loss of lifting capacity, resulting in the load platform (or platform of load) sliding or even falling, causing a major safety accident.

[0003] To overcome these shortcomings, some solutions attempt to introduce a mechanical locking mechanism after the hydraulic jacking is in place. However, existing mechanical locking methods often suffer from insufficient reliability and low automation. For example, the common single-point pin lock has only one locking point and lacks redundancy; if this point fails, the entire locking system fails. Furthermore, the engagement and disengagement of these mechanical locks typically rely on manual observation and operation, which is not only inefficient but also carries the risk of misoperation or incomplete locking (such as the pin not being fully inserted), posing a significant safety hazard when the hydraulic system fails to maintain pressure.

[0004] The aforementioned safety issues are particularly prominent in demanding conditions such as bridge cantilever construction, where safety requirements are extremely high. In such construction, the hanging basket, as the core mobile work platform, undergoes frequent lifting and locking operations, which directly affect the safety of construction personnel and the quality of the project. Traditional hanging basket lifting methods, whether relying on hydraulic pressure maintenance or simple mechanical locks, are difficult to effectively avoid the risk of slippage due to system depressurization or human negligence. Summary of the Invention

[0005] This invention provides a self-locking hydraulic jacking device and its usage method. The invention first uses a hydraulic lifting unit to hydraulically lift a pressure plate. After the pressure plate rises to a preset height, a multi-layered interlocking mechanical safety bearing state is formed by a first locking unit, a second locking unit, a third locking unit, and a fourth locking unit. This provides the hydraulic lifting unit with mechanical locking protection independent of the power source, eliminating the need to rely on the hydraulic system for pressure maintenance. This effectively solves the inherent risks of low safety redundancy and reliance on system pressure maintenance in existing technologies, providing safety assurance for various high-safety construction heavy-load lifting operations, including hanging basket jacking.

[0006] This device is suitable for lifting and safely locking large components such as hanging baskets in bridge construction, and can also be used in other situations requiring high-safety vertical lifting.

[0007] In a first aspect, the present invention provides a self-locking hydraulic lifting device, comprising a lifting work platform and a base fixedly connected to the lifting work platform, and further comprising a lifting module, the lifting module comprising:

[0008] A fixed frame is fixedly connected to the lifting work platform, and a functional unit is connected to the bottom of the fixed frame;

[0009] The hydraulic lifting unit includes a hydraulic pump fixed to the inner wall of the functional body, the hydraulic pump is connected to a hydraulic lifting shaft, and the end of the hydraulic lifting shaft is connected to a pressure plate.

[0010] The first lock body unit includes a locking ring disposed within the functional body, which can be driven to move along the height direction of the functional body and rotate about the axis of the functional body.

[0011] The third lock body unit includes a lock frame body disposed on the inner bottom wall of the lock ring, a safety seat disposed on the side of the lock frame body facing the hydraulic lifting shaft, a support block seat disposed on the top of the lock frame body, a first lock shaft that can pass through the support block seat and extend to the side of the hydraulic lifting shaft, and a second lock shaft that can pass through the lock frame body and extend to the side of the inner wall of the functional body.

[0012] The second lock body unit is located on the hydraulic lifting shaft; the second lock body unit has a first lock groove; the bottom of the second lock body unit has a lock insert; when the lock ring rises to the point where the safety seat contacts the bottom surface of the second lock body unit, rotating the lock ring can position and connect the safety seat groove of the safety seat with the lock insert. After the safety seat groove is positioned and connected with the lock insert, the first lock shaft can be driven to extend into the first lock groove.

[0013] The fourth lock body unit includes a slide rail fixed to the functional body and a lock platform that can be driven to move along the slide rail. When the first lock shaft extends into the first lock groove and the lock platform rises to be coaxial with the second lock shaft, the second lock shaft can be driven to pass through the lock hole of the lock ring and extend into the second lock groove of the lock platform.

[0014] Optionally, the first lock body unit further includes:

[0015] The first drive motor is mounted on the inner top wall of the functional body;

[0016] A turntable is located above the hydraulic pump. The top surface of the turntable is connected to the first drive motor via a rotating shaft, and multiple second drive motors are provided on the bottom surface. The multiple second drive motors are arranged in a circular array relative to the axis of the turntable.

[0017] The first lead screw is connected to the second drive motor, and the locking ring is sleeved on the first lead screw;

[0018] The second drive motor can drive the first lead screw to rotate, thereby causing the locking ring to move along the height direction of the functional body;

[0019] The first drive motor can drive the turntable to rotate, thereby causing the lock to rotate around the axis of the functional body.

[0020] Optionally, multiple third lock body units are provided, and the multiple third lock body units are circumferentially distributed around the hydraulic lifting shaft; a first pressure sensor is provided on the upper part of the safety seat; when the pressure value detected by the first pressure sensor reaches a preset value, it is determined that the safety seat is in contact with the bottom surface of the second lock body unit, and the lock ring stops rising.

[0021] Optionally, the third lock body unit further includes:

[0022] A fixed plate base is provided on the top surface of the lock frame body. A third drive motor is provided on the fixed plate base. The third drive motor is connected to a second lead screw. A slide block is connected to the second lead screw. The slide block is slidably engaged with a sliding groove on the top surface of the lock frame body. One end of the first lock shaft is connected to the slide block through the fixed frame body. The other end is provided with a second pressure sensor.

[0023] The third drive motor can drive the second lead screw to rotate, thereby causing the slide to drive the first locking shaft to extend into the first locking groove on the second lock body unit. When the pressure value detected by the second pressure sensor reaches the preset value, it is determined that the first locking shaft is fully extended into the first locking groove, the first locking shaft abuts against the bottom wall of the first locking groove, and the third drive motor stops rotating.

[0024] Optionally, the third lock body unit further includes:

[0025] The fourth drive motor is located in the mounting slot on the safety seat facing the fourth lock body unit. The fourth drive motor is connected to the third lead screw, which is connected to the slide frame. The front end of the slide frame is connected to the second lock shaft that passes through the lock frame body through a fixed shaft. The end of the second lock shaft facing the fourth lock body unit is provided with a third pressure sensor. The second lock shaft is embedded with a first position sensor.

[0026] The fourth drive motor can drive the third lead screw to rotate, thereby causing the slide frame to extend the second locking shaft. When the pressure value detected by the third pressure sensor reaches the preset value, it is determined that the second locking shaft is fully inserted into the second locking groove of the locking platform. The second locking shaft abuts against the bottom wall of the second locking groove, and the fourth drive motor stops rotating.

[0027] Optionally, the fourth lock body unit further includes:

[0028] The top and bottom fixed plates are used to fix the slide rail frame to the functional body.

[0029] A gear slide frame is slidably disposed within the slide rail frame, and a locking platform is disposed on the side of the gear slide frame facing the locking ring. A second position sensor is provided on the locking platform.

[0030] The fifth drive motor is connected to a rotating shaft, on which a fixed lifting gear shaft that meshes with the gear slide frame is installed. The end of the rotating shaft away from the fifth drive motor is connected to a rotating frame. Both the rotating frame and the fifth drive motor are fixedly connected to the inner wall of the functional body through a fixed mesh frame.

[0031] The fifth drive motor can drive the gear slide frame to move along the slide rail frame through the fixed lifting gear shaft, and the locking platform can move along the slide rail frame with the gear slide frame.

[0032] Optionally, bearing plate positioners are installed on both sides of the bearing plate.

[0033] Optionally, the bottom of the fixed frame is provided with a fixed top frame, and the functional body includes a first functional body and a second functional body arranged sequentially at the bottom of the fixed top frame. The second functional body is installed on the base through a fixing ring at the bottom. A base groove is provided on the inner side of the fixing ring, and the locking ring can be lowered into the base groove.

[0034] Optionally, the mounting end of the hydraulic pump is fixed to the inner wall of the functional body by a plurality of fixed shafts circumferentially distributed relative to the axis of the functional body.

[0035] Secondly, the present invention provides a method of using the self-locking hydraulic lifting device described in the first aspect, comprising the following steps:

[0036] Start the hydraulic pump, which drives the pressure plate upward through the hydraulic lifting shaft;

[0037] After the pressure plate reaches the preset height position, the locking ring is driven to move along the height direction of the functional body. When the locking ring rises to the point where the safety seat contacts the bottom surface of the second lock body unit, the locking ring is rotated to position and connect the safety seat and the lock plug. After the safety seat and the lock plug are positioned and connected, the first lock shaft is driven to extend into the first lock groove.

[0038] When the first locking shaft extends into the first locking groove and the locking platform rises to be coaxial with the second locking shaft, the second locking shaft is driven to pass through the lock hole of the locking ring and extend into the second locking groove of the locking platform.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] 1. In use, the self-locking hydraulic jacking device of the present invention first starts the hydraulic pump, which drives the pressure plate to a preset height position through the hydraulic jacking shaft. After the pressure plate reaches the preset height position, the locking ring is driven to move along the height direction of the functional body. When the locking ring rises to the point where the safety seat of the third lock body unit contacts the bottom surface of the second lock body unit, the locking ring is rotated to position and connect the safety seat groove of the safety seat with the locking plug. After the safety seat groove is positioned and connected with the locking plug, the first locking shaft is driven to extend into the first locking groove. When the first locking shaft extends into the first locking groove and the locking platform rises to the same axis as the second locking shaft, the second locking shaft is driven to pass through the locking hole of the locking ring and extend into the second locking groove of the locking platform, thereby realizing multi-level, redundant rigid locking, and finally forming a mechanical load-bearing locking structure that does not rely on a hydraulic system. The self-locking hydraulic jacking device of the present invention provides a rigid and stable direct jacking mode: the jacking force is applied vertically and directly to the load bearing surface through the pressure plate, and the force transmission path is clear without intermediate swing or flexible traction. Unlike traditional methods that use flexible components such as steel wire ropes for suspension, this method eliminates the risks of swaying and impact, making the lifting process more stable and controllable. It is particularly suitable for heavy-load lifting scenarios with high requirements for precision and stability.

[0041] 2. The self-locking hydraulic jacking device of this invention employs a multi-step, multi-point sequential interlocking logic in its mechanical self-locking process, forming a multi-layered, redundant interlocking rigid network. An unexpected event in a single component will not cause overall locking failure. Simultaneously, integrated position and pressure sensors form a network working in synergy, achieving intelligent closed-loop control and real-time monitoring throughout the entire process, from jacking start-up and precise positioning to multi-level locking status verification. This ensures the accuracy and reliability of each operation and significantly improves the maintainability and fault diagnosis efficiency of the equipment. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the self-locking hydraulic lifting device of the present invention;

[0043] Figure 2 This is a front view of the self-locking hydraulic lifting device of the present invention;

[0044] Figure 3 This is a partial schematic diagram of the self-locking hydraulic lifting device of the present invention;

[0045] Figure 4 This is a schematic diagram of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0046] Figure 5 This is a front view of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0047] Figure 6 This is a partial cross-sectional view of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0048] Figure 7 This is a partially cutaway front view of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0049] Figure 8 This is a cross-sectional view of the internal locking ring structure of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0050] Figure 9 This is a partially enlarged cross-sectional view of the internal locking ring of the lifting module of the self-locking hydraulic lifting device of the present invention;

[0051] Figure 10 This is a schematic diagram of the structure of the third locking body unit of the self-locking hydraulic lifting device of the present invention;

[0052] Figure 11 This is a cross-sectional view of the third locking body unit of the self-locking hydraulic lifting device of the present invention;

[0053] Figure 12 This is a schematic diagram of the structure of the fourth locking body unit of the self-locking hydraulic lifting device of the present invention;

[0054] Figure 13 This is a front view of the fourth locking body unit of the self-locking hydraulic lifting device of the present invention;

[0055] Figure 14 This is a partially enlarged view of the self-locking structure of the self-locking hydraulic lifting device of the present invention;

[0056] Figure 15 This is a schematic diagram of the self-locking structure of the self-locking hydraulic lifting device of the present invention;

[0057] Figure 16 This is a front view of the self-locking structure of the self-locking hydraulic lifting device of the present invention.

[0058] In the picture:

[0059] 1. Lifting work platform; 2. Movable fixed frame; 3. Fixed frame; 4. Base; 5. Guardrail; 6. Lifting module; 7. Pressure plate; 8. Plate positioner; 61. Fixed top frame; 62. First functional unit; 63. Second functional unit; 64. Fixing ring; 641. Base groove; 65. First locking unit; 651. First drive motor; 652. Rotating shaft; 6521. Turntable; 653. Second drive motor 654. First lead screw; 655. Locking ring; 6551. Locking hole; 66. Hydraulic lifting unit; 661. Hydraulic pump; 662. Fixed shaft; 663. Hydraulic lifting shaft; 6631. Second lock body unit; 6632. Lock insert; 6633. First lock groove; 67. Third lock body unit; 671. Lock frame body; 6711. Slide groove; 672. Safety seat; 6721. Safety seat groove; 6722. First Pressure sensor; 673, support block seat; 674, third drive motor; 6741, second lead screw; 6742, slide block; 6743, fixed frame; 6744, first locking shaft; 6745, second pressure sensor; 675, fixed plate seat; 676, fourth drive motor; 6761, third lead screw; 6762, slide frame; 6763, fixed shaft; 6764, second locking shaft; 6765, third pressure sensor; 6766, first position sensor; 68, fourth lock body unit; 681, slide rail frame; 682, top fixed frame plate; 683, bottom fixed frame plate; 684, gear slide frame; 6841, locking platform; 6842, second locking groove; 6843, second position sensor; 685, fifth drive motor; 686, rotating shaft; 687, fixed lifting gear shaft; 688, rotating frame; 689, fixed mesh frame. Detailed Implementation

[0060] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0061] Combination Figures 1 to 3 This embodiment provides a self-locking hydraulic jacking device, including a jacking work platform 1 and a base 4 fixedly connected to the jacking work platform 1. The self-locking hydraulic jacking device also includes jacking modules 6. In a specific embodiment, five sets of jacking modules 6 are arranged on the upper part of the base 4, and jacking modules 6 are also symmetrically arranged on both sides of the movable fixed frame 2. The jacking module 6 includes a fixed frame 3, a hydraulic lifting unit 66, a first locking body unit 65, a second locking body unit 6631, a third locking body unit 67, and a fourth locking body unit 68.

[0062] The fixed frame 3 is fixedly connected to the movable fixed frame 2 on the lifting work platform 1, and the base 4 is fixedly installed on the movable fixed frame 2; a guardrail 5 is provided on the upper part of the base 4; combined with Figure 4 and Figure 5A functional body is connected below the fixed frame 3. A fixed top frame 61 is provided at the bottom of the fixed frame 3. The functional body includes a first functional body 62 and a second functional body 63 arranged sequentially at the bottom of the fixed top frame 61. The second functional body 63 is mounted on the base 4 through a fixed ring 64 at the bottom. A base groove 641 for supporting the locking ring 655 of the first locking body unit 65 is provided on the inner side of the fixed ring 64.

[0063] Combination Figure 6 and Figure 7 The hydraulic lifting unit 66 includes a hydraulic pump 661 fixed to the inner wall of the functional body. The hydraulic pump 661 is connected to a hydraulic lifting shaft 663. The end of the hydraulic lifting shaft 663 is connected to a pressure plate 7. The pressure plate 7 is equipped with a plate position locator 8 on both sides. The mounting end of the hydraulic pump 661 is fixed to the inner wall of the functional body by a plurality of fixed shafts 662 distributed circumferentially relative to the axis of the functional body.

[0064] Combination Figure 6 and Figure 7 The first lock body unit 65 includes a locking ring 655 disposed within the functional body. The locking ring 655 can be driven to move along the height direction of the functional body and rotate about the axis of the functional body. The first lock body unit 65 also includes a first drive motor 651, a turntable 6521, and a first lead screw 654. The first drive motor 651 is mounted on the inner top wall of the functional body. The turntable 6521 is disposed above the hydraulic pump 661, and the top surface of the turntable 6521 is connected to the first drive motor 651 via a rotating shaft 652. Multiple second drive motors 653 are provided on the surface, and the multiple second drive motors 653 are arranged in a circular array relative to the axis of the turntable 6521. The first lead screw 654 is connected to the second drive motors 653, and the locking ring 655 is sleeved on the first lead screw 654. The second drive motor 653 can drive the first lead screw 654 to rotate, thereby driving the locking ring 655 to move along the height direction of the functional body. The first drive motor 651 can drive the locking ring 655 to rotate around the axis of the functional body through the turntable 6521. In this embodiment, the turntable 6521 is restricted to rotating within a 30° range to avoid interference between the first lead screw 654 and the fixed shaft 662 of the hydraulic pump 661.

[0065] Combination Figure 8 and Figure 9 The inner bottom wall of the locking ring 655 is provided with a third locking body unit 67; there are multiple third locking body units 67, which are distributed circumferentially around the hydraulic lifting shaft 663.

[0066] Combination Figure 10 and Figure 11The third lock body unit 67 includes a lock frame 671 disposed on the inner bottom wall of the lock ring 655, a safety seat 672 disposed on the side of the lock frame 671 facing the hydraulic lifting shaft 663, a support block seat 673 disposed on the top of the lock frame 671, a first lock shaft 6744 that can pass through the support block seat 673 and extend to the side of the hydraulic lifting shaft 663, and a second lock shaft 6764 that can pass through the lock frame 671 and extend to the inner wall of the functional body. The second lock body unit 6631 is mounted on the hydraulic lifting shaft 663. A first lock groove 6633 is formed on the second lock body unit 6631. A lock insert 6632 is provided at the bottom of the second lock body unit 6631. The safety seat 672 has a safety seat groove 6721 for positioning and connecting with the lock insert 6632. When the lock ring 655 rises to contact the bottom surface of the second lock body unit 6631, rotating the lock ring 655 can position and connect the lock insert 6632 with the safety seat groove 6721. After the safety seat groove 6721 and the lock insert 6632 are positioned and connected, the first lock shaft 6744 can be driven to extend into the first lock groove 6633. A first pressure sensor 6722 is provided on the upper part of the safety seat 672. When the pressure value detected by the first pressure sensor 6722 reaches a preset value, it is determined that the safety seat 672 is in contact with the bottom surface of the second lock body unit 6631. At this time, the second drive motor 653 needs to stop rotating, and the lock ring 655 stops rising.

[0067] Combination Figure 10 and Figure 11 The third lock body unit 67 further includes a fixed plate base 675, which is disposed on the top surface of the lock frame 671. A third drive motor 674 is provided on the fixed plate base 675. The third drive motor 674 is connected to a second lead screw 6741. A slide block 6742 is connected to the second lead screw 6741. The slide block 6742 is slidably engaged with a sliding groove 6711 on the top surface of the lock frame 671. The first lock shaft 6744 passes through the support block base 673. One end of the first lock shaft 6744 is connected to the slide block 6742 through the fixed frame 6743, and the other end is provided with a second pressure sensor 6745.

[0068] The third drive motor 674 can drive the second lead screw 6741 to rotate, thereby driving the slide block 6742 to drive the first locking shaft 6744 to extend into the first locking groove 6633 on the second lock body unit 6631. When the pressure value detected by the second pressure sensor 6745 reaches the preset value, it is determined that the first locking shaft 6744 is fully extended into the first locking groove 6633 and the first locking shaft 6744 abuts against the bottom wall of the first locking groove 6633. The third drive motor 674 needs to stop rotating.

[0069] Combination Figure 11The third lock body unit 67 further includes a fourth drive motor 676, which is disposed in a mounting groove on the safety seat 672 facing the fourth lock body unit 68. The fourth drive motor 676 is connected to a third lead screw 6761, which is connected to a slide frame 6762. The front end of the slide frame 6762 is connected to a second locking shaft 6764 that passes through the lock frame 671 via a fixed shaft 6763. A third pressure sensor 6765 is provided at one end of the second locking shaft 6764 facing the fourth lock body unit 68, and a first position sensor 6766 is embedded inside the second locking shaft 6764.

[0070] Combination Figure 12 and Figure 13 The fourth lock body unit 68 includes a slide rail frame 681 fixed within the functional body and a lock platform 6841 that can be driven to move along the slide rail frame 681. When the first lock shaft 6744 extends into the first lock groove 6633 and the lock platform 6841 rises to be coaxial with the second lock shaft 6764, the second lock shaft 6764 can be driven to pass through the lock hole 6551 of the lock ring 655 and extend into the second lock groove 6842 of the lock platform 6841. A first position sensor 6766 is embedded inside the second lock shaft 6764. The fourth lock body unit 68 also includes a top fixing plate 682, a bottom fixing plate 683, a gear slide frame 684, and a fifth drive motor 685. The slide rail frame 681 is connected to the inner wall of the functional body via a top fixing plate. Plate 682 and bottom support plate 683 connected to the bottom wall of the functional body are fixed inside the functional body; the gear slide frame 684 is slidably disposed inside the slide rail frame 681, the locking platform 6841 is disposed on the side of the gear slide frame 684 facing the locking ring 655, and the locking platform 6841 is provided with a second position sensor 6843; the fifth drive motor 685 is connected to a rotating shaft 686, and a fixed lifting gear shaft 687 that meshes with the gear slide frame 684 is installed on the rotating shaft 686. The end of the rotating shaft 686 away from the fifth drive motor 685 is connected to a rotating frame 688, and the rotating frame 688 and the fifth drive motor 685 are both fixedly connected to the inner wall of the functional body through a fixed mesh frame 689;

[0071] The fifth drive motor 685 can drive the gear slide frame 684 to move along the slide rail frame 681 via the fixed lifting gear shaft 687, and the locking platform 6841 can move along the slide rail frame 681 with the gear slide frame 684. The first position sensor 6766 and the second position sensor 6843 can determine whether the locking platform 6841 has risen to be coaxial with the second locking shaft 6764. When the locking platform 6841 rises to be coaxial with the second locking shaft 6764, the fourth drive motor 676 drives the third lead screw 6761 to rotate, thereby driving the slide frame 6762 to extend the second locking shaft 6764. When the pressure value detected by the third pressure sensor 6765 reaches the preset value, it is determined that the second locking shaft 6764 passes through the locking hole 6551 of the locking ring 655 and is fully inserted into the second locking groove 6842 of the locking platform 6841. The second locking shaft 6764 abuts against the bottom wall of the second locking groove 6842, and the fourth drive motor 676 needs to stop rotating.

[0072] In this embodiment, the hydraulic lifting unit 66 can hydraulically lift the pressure plate 7. The first locking unit 65, the second locking unit 6631, the third locking unit 67, and the fourth locking unit 68 form a mechanical self-locking combination to provide mechanical locking protection for the hydraulic lifting unit 66. The self-locking hydraulic jacking device of this embodiment can effectively solve the operational risks in specific scenarios such as basket lifting.

[0073] Furthermore, the working principle of the self-locking hydraulic lifting device in this embodiment is as follows: First, the hydraulic pump 661 is started. The hydraulic pump 661 drives the pressure plate 7 to a preset height position through the hydraulic lifting shaft 663. After the pressure plate 7 reaches the preset height position, the locking ring 655 is driven to move along the height direction of the functional body. When the locking ring 655 rises to the point where the safety seat 672 contacts the bottom surface of the second lock body unit 6631, the locking ring 655 is rotated to position and connect the safety seat 672 and the locking plug 6632. After the positioning connection is completed (32), the first locking shaft 6744 is driven to extend into the first locking groove 6633. When the first locking shaft 6744 extends into the first locking groove 6633 and the locking platform 6841 rises to be coaxial with the second locking shaft 6764, the second locking shaft 6764 is driven to pass through the locking hole 6551 of the locking ring 655 and extend into the second locking groove 6842 of the locking platform 6841, thereby realizing multi-level, redundant rigid locking. This ultimately forms a mechanical load-bearing locking structure that does not rely on a hydraulic system, supplemented by full-process electronic sensing monitoring to ensure safety. This embodiment realizes the inherently safe paradigm of "hydraulic drive, mechanical load protection": after the lifting is completed, the device can automatically construct a rigid safety load-bearing frame independent of the hydraulic system through the multiple mechanical self-locking combinations composed of the first locking body unit 65, the second locking body unit 6631, the third locking body unit 67, and the fourth locking body unit 68. This means that even if the hydraulic power fails, the load can be locked at the current height by multi-level mechanical locks, solving the safety hazard of pressure loss and slippage that exists in traditional hydraulic jacking equipment that relies on system pressure maintenance. It provides safety assurance for high-risk operations such as high-altitude and heavy-load operations, and the entire workflow is automated. Example 2

[0074] Combination Figures 14 to 16 This embodiment provides a method for using the self-locking hydraulic lifting device described in Embodiment 1. The specific steps are as follows:

[0075] S1. The pressure plate 7 is lifted. The position and pressure value related preset information are input into the controller fixed to the movable fixed frame 2. The hydraulic pump 661 is started. The hydraulic pump 661 drives the pressure plate 7 at its bottom to be lifted vertically upward through the hydraulic lifting shaft 663. During the lifting process, the position information of the pressure plate 7 is monitored in real time by the plate position positioners 8 on both sides of the pressure plate 7 to ensure that it reaches the preset position and remains horizontal.

[0076] S2. After the pressure plate 7 reaches the preset position, the second drive motor 653 starts working. The first lead screw 654 drives the locking ring 655 to move vertically upward. At the same time, the first pressure sensor 6722 senses the pressure information in real time. When the pressure value detected by the first pressure sensor 6722 reaches the preset value, it indicates that the safety seat 672 has abutted the bottom of the second lock body unit 6631. The first drive motor 651 drives the turntable 6521 to rotate, thereby driving the locking ring 655 to rotate counterclockwise by a preset angle, which is set to 30° in this embodiment. The lock insert 6632 is inserted into the safety seat groove 6721, and then the third drive... When the motor 674 starts, the second lead screw 6741 rotates, thereby driving the slide 6742 to move forward along the slide groove 6711. The fixed frame 6743 set at the front end of the slide 6742 pushes the first locking shaft 6744 forward. After the first locking shaft 6744 extends out of the support block seat 673, it is inserted into the first locking groove 6633 until the pressure value detected by the second pressure sensor 6745 reaches the preset value, indicating that the first locking shaft 6744 is fully inserted into the first locking groove 6633. The first locking shaft 6744 abuts against the bottom wall of the first locking groove 6633, clamping and fixing the second lock body unit 6631.

[0077] S3. Using the first position sensor 6766 and the second position sensor 6843 to locate the position information of the second locking shaft 6764 and the locking platform 6841 in real time, the fifth drive motor 685 is started, driving the fixed lifting gear shaft 687 to rotate. The fixed lifting gear shaft 687 drives the gear slide frame 684 to move upward, thereby driving the locking platform 6841 to move upward until the locking platform 6841 is coaxial with the second locking shaft 6764. Then, the fourth drive motor 676 is started, driving the third lead screw 6761 to rotate. The slide frame 6762 moves forward, causing the second locking shaft 6764 to pass through the lock hole 6551 and insert into the second locking groove 6842. When the pressure value detected by the third pressure sensor 6765 reaches the preset value, it indicates that the second locking shaft 6764 is fully inserted into the second locking groove 6842. The second locking shaft 6764 abuts against the bottom wall of the second locking groove 6842, and the second locking shaft 6764 and the second locking groove 6842 form a fixed clamping.

[0078] The third locking unit 67 can form a mechanical lock with the first locking unit 65, the second locking unit 6631 and the fourth locking unit 68 respectively. In this embodiment, the third locking unit 67 can provide a safe mechanical self-locking position for the hydraulic lifting unit 66. In this embodiment, a safety monitoring network is formed by the first pressure sensor 6722, the second pressure sensor 6745 and the third pressure sensor 6765. When the detected pressure value is abnormal, it needs to automatically notify the management personnel, and the operators need to check and confirm the maintenance on site.

[0079] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-locking hydraulic jacking device, comprising a jacking work platform and a base fixedly connected to the jacking work platform, characterized in that, It also includes a lifting module, which includes: A fixed frame is fixedly connected to the lifting work platform, and a functional unit is connected to the bottom of the fixed frame; The hydraulic lifting unit includes a hydraulic pump fixed to the inner wall of the functional body, the hydraulic pump is connected to a hydraulic lifting shaft, and the end of the hydraulic lifting shaft is connected to a pressure plate. The first lock body unit includes a locking ring disposed within the functional body, which can be driven to move along the height direction of the functional body and rotate about the axis of the functional body. The third lock body unit includes a lock frame body disposed on the inner bottom wall of the lock ring, a safety seat disposed on the side of the lock frame body facing the hydraulic lifting shaft, a support block seat disposed on the top of the lock frame body, a first lock shaft that can pass through the support block seat and extend to the side of the hydraulic lifting shaft, and a second lock shaft that can pass through the lock frame body and extend to the side of the inner wall of the functional body. The second lock body unit is located on the hydraulic lifting shaft; the second lock body unit has a first lock groove; the bottom of the second lock body unit has a lock insert; when the lock ring rises to the point where the safety seat contacts the bottom surface of the second lock body unit, rotating the lock ring can make the safety seat groove on the safety seat and the lock insert position and connect. After the safety seat groove and the lock insert are position and connected, the first lock shaft can be driven to extend into the first lock groove. The fourth lock body unit includes a slide rail frame fixed in the functional body and a lock platform that can be driven to move along the slide rail frame. When the first lock shaft extends into the first lock groove and the lock platform rises to be coaxial with the second lock shaft, the second lock shaft can be driven to pass through the lock hole of the lock ring and extend into the second lock groove of the lock platform. The first lock body unit further includes: The first drive motor is mounted on the inner top wall of the functional body; A turntable is located above the hydraulic pump. The top surface of the turntable is connected to the first drive motor via a rotating shaft, and multiple second drive motors are provided on the bottom surface. The multiple second drive motors are arranged in a circular array relative to the axis of the turntable. The first lead screw is connected to the second drive motor, and the locking ring is sleeved on the first lead screw; The second drive motor can drive the first lead screw to rotate, thereby causing the locking ring to move along the height direction of the functional body; The first drive motor can drive the turntable to rotate, thereby causing the lock to rotate around the axis of the functional body.

2. The self-locking hydraulic jacking device according to claim 1, characterized in that, The third locking body unit is provided in multiple ways, and the multiple third locking body units are circumferentially distributed around the hydraulic lifting axis; The safety seat is equipped with a first pressure sensor on its upper part; when the pressure value detected by the first pressure sensor reaches a preset value, it is determined that the safety seat is in contact with the bottom surface of the second lock body unit, and the lock ring stops rising.

3. The self-locking hydraulic jacking device according to claim 2, characterized in that, The third lock body unit also includes: A fixed plate base is provided on the top surface of the lock frame body. A third drive motor is provided on the fixed plate base. The third drive motor is connected to a second lead screw. A slide block is connected to the second lead screw. The slide block is slidably engaged with a sliding groove on the top surface of the lock frame body. One end of the first lock shaft is connected to the slide block through the fixed frame body. The other end is provided with a second pressure sensor. The third drive motor can drive the second lead screw to rotate, thereby causing the slide to drive the first locking shaft to extend into the first locking groove on the second lock body unit. When the pressure value detected by the second pressure sensor reaches the preset value, it is determined that the first locking shaft is fully extended into the first locking groove, the first locking shaft abuts against the bottom wall of the first locking groove, and the third drive motor stops rotating.

4. The self-locking hydraulic jacking device according to claim 2, characterized in that, The third lock body unit also includes: The fourth drive motor is located in the mounting slot on the safety seat facing the fourth lock body unit. The fourth drive motor is connected to the third lead screw, and the third lead screw is connected to the slide frame. The front end of the slide frame is connected to the second lock shaft that passes through the lock frame body through a fixed shaft. A third pressure sensor is provided at one end of the second locking shaft facing the fourth locking body unit; a first position sensor is embedded inside the second locking shaft; The fourth drive motor can drive the third lead screw to rotate, thereby causing the slide frame to extend the second locking shaft. When the pressure value detected by the third pressure sensor reaches the preset value, it is determined that the second locking shaft is fully inserted into the second locking groove of the locking platform. The second locking shaft abuts against the bottom wall of the second locking groove, and the fourth drive motor stops rotating.

5. The self-locking hydraulic jacking device according to claim 1, characterized in that, The fourth lock body unit also includes: Top and bottom fixed plates, the slide rail frame is fixed in the functional body by a top fixed plate connected to the inner side wall of the functional body and a bottom fixed plate connected to the bottom wall of the functional body; A gear slide frame is slidably disposed within the slide rail frame, and a locking platform is disposed on the side of the gear slide frame facing the locking ring. A second position sensor is provided on the locking platform. The fifth drive motor is connected to a rotating shaft, on which a fixed lifting gear shaft that meshes with the gear slide frame is installed. The end of the rotating shaft away from the fifth drive motor is connected to a rotating frame. Both the rotating frame and the fifth drive motor are fixedly connected to the inner wall of the functional body through a fixed mesh frame. The fifth drive motor can drive the gear slide frame to move along the slide rail frame through the fixed lifting gear shaft, and the locking platform can move along the slide rail frame with the gear slide frame.

6. The self-locking hydraulic jacking device according to claim 1, characterized in that, The bearing plate is equipped with bearing plate position locators on both sides.

7. The self-locking hydraulic jacking device according to claim 1, characterized in that, The bottom of the fixed frame is provided with a fixed top frame. The functional body includes a first functional body and a second functional body arranged sequentially at the bottom of the fixed top frame. The second functional body is installed on the base through a fixed ring at the bottom. A base groove is provided on the inner side of the fixed ring, and the locking ring can be lowered into the base groove.

8. The self-locking hydraulic jacking device according to claim 1, characterized in that, The mounting end of the hydraulic pump is fixed to the inner wall of the functional body by a plurality of fixed shafts circumferentially distributed relative to the axis of the functional body.

9. A method of using the self-locking hydraulic jacking device according to any one of claims 1-8, characterized in that, The method of use includes the following steps: Start the hydraulic pump, which drives the pressure plate upward through the hydraulic lifting shaft; After the pressure plate reaches the preset height position, the locking ring is driven to move along the height direction of the functional body. When the locking ring rises to the point where the safety seat contacts the bottom surface of the second lock body unit, the locking ring is rotated to position and connect the safety seat and the lock plug. After the safety seat and the lock plug are positioned and connected, the first lock shaft is driven to extend into the first lock groove. When the first locking shaft extends into the first locking groove and the locking platform rises to be coaxial with the second locking shaft, the second locking shaft is driven to pass through the lock hole of the locking ring and extend into the second locking groove of the locking platform.

Images