PLC numerical control mobile hydraulic top-pulling device intelligent control system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OVERHAUL SECTION OF SHANGHAI PUBLIC WORKS OF CHINA RAILWAY SHANGHAI BUREAU GRP CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-21
Smart Images
Figure CN224530506U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of synchronous jacking technology, and more specifically to an intelligent control system for a PLC numerical control mobile hydraulic jacking device. Background Technology
[0002] With the development of industries and other fields, the demand for synchronous control of multiple actuators is becoming increasingly strong. For example, in bridge construction, the requirements for synchronous lifting of multiple hydraulic cylinders are strict, and the overall platform structure is complex and affected by various random loads. Asynchronous hydraulic cylinder power groups can affect the bridge's posture and deformation control. To improve the synchronous lifting effect, existing technologies often use PLC to synchronously control multiple hydraulic jacks to lift simultaneously to complete the lifting process.
[0003] However, during the lifting process, relying solely on multiple hydraulic jacks to support the object can lead to a hydraulic system malfunction, such as a broken hydraulic hose or a faulty hydraulic pump. Furthermore, the increased number of hydraulic jacks used increases the probability of one or more malfunctions. This can result in insufficient support or tilting of the lifting surface due to jack damage, potentially causing the object to fall rapidly or become damaged and deformed, posing a safety hazard.
[0004] Therefore, how to provide a PLC-controlled hydraulic jacking system with a self-locking support mechanism that can simultaneously raise and lower the hydraulic jack and provide self-locking support when stopped is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] In view of this, the present invention provides an intelligent control system for a PLC-controlled mobile hydraulic jacking device. By setting a self-locking support mechanism between the intervals of two adjacent hydraulic jacks, the mechanism can lift synchronously with the hydraulic jacks. When the hydraulic jacks stop or malfunction, the self-locking support mechanism uses the locking teeth of its support column and the locking groove on the slider to complete the self-locking process, thereby supporting the object being lifted and preventing local deformation. This solves the technical problem in the prior art where insufficient support force or local deformation and damage are caused by the failure of the hydraulic jacks themselves.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A PLC-controlled intelligent control system for a mobile hydraulic jacking device includes:
[0008] Equipment box;
[0009] A hydraulic power unit, which is assembled inside the equipment box and whose output end is connected in parallel to multiple hydraulic jacks;
[0010] The self-locking support mechanism comprises multiple self-locking support mechanisms spaced apart between adjacent hydraulic jacks and supporting the lifting action together. Each self-locking support mechanism includes a support base, a support column, and multiple sets of electrically controlled unlocking components. Assembly holes are provided along the support direction, and a booster spring is coaxially installed within each assembly hole. The support column is vertically movable within the assembly hole, with its bottom end abutting against the elastic end of the booster spring. The top surface of the support column abuts against the bottom surface of the object being lifted. Engaging teeth are circumferentially arranged on the outer wall of the support column, and these teeth are all inclined downwards along the axial direction of the support column. Multiple first inner cavities are spaced apart circumferentially on the inner side of the support base. Each of the first inner cavities has an opening on one side corresponding to the axis of the support base. Multiple sliders are elastically installed within each first inner cavity, and each slider can reciprocate radially along the support base. Each slider has a slot on its side wall facing the axis of the support base, which engages with the locking teeth. The locking teeth are fitted into the slots to prevent the support column from descending. The support base has multiple second inner cavities below the first inner cavities. Multiple sets of electrically controlled unlocking components are installed inside the multiple second inner cavities, and their driving ends are connected to the multiple sliders to push the sliders, thereby disengaging the locking teeth from the slots.
[0011] The PLC controller is installed inside the equipment box and is electrically connected to the hydraulic station and multiple electrically controlled unlocking components.
[0012] Based on the above technical solution, this utility model discloses an intelligent control system for a PLC-controlled mobile hydraulic jacking device. When the equipment box is moved to the position where the object to be lifted needs to be lifted, the hydraulic station starts working, and multiple hydraulic jacks connected in parallel at its output end move synchronously to lift the object upwards. During the lifting process, because the top of the support column of the self-locking support mechanism abuts against the bottom support surface of the object being lifted, and its bottom is elastically installed in the assembly hole through a booster spring, when the object being lifted is subjected to the lifting force of the hydraulic jacks, the support column is subjected to the booster spring force, allowing it to rise together with the object. When the hydraulic jacks stop lifting or one or more of them malfunction or fail, the support column... The object being lifted is subjected to downward pressure, causing the locking teeth on its outer peripheral wall to engage with the locking groove on the slider in the first inner cavity of the support base. Under the elastic action, the slider locks the locking teeth, preventing the support column from descending and allowing the support column to support the object, preventing local deformation and damage. When it is necessary to lower the object, the PLC controller controls the electric unlocking component to work. The drive end of the electric unlocking component pushes the slider, causing the locking groove on the slider to disengage from the locking teeth, releasing the locking state of the support column, allowing the support column to move downward along the axial direction of the assembly hole. At this time, under the control of the hydraulic station, the hydraulic jack slowly retracts, driving the support column to descend, ultimately achieving a smooth descent of the object. Therefore, the intelligent control system of this PLC-controlled mobile hydraulic jacking equipment can provide reliable support in the event of a hydraulic system failure through a self-locking support mechanism, preventing objects from suddenly falling and causing accidents. Moreover, the support for the object is more stable during the jacking process, reducing the risk of object tilting and damage. Furthermore, it can achieve automated control through the PLC controller. Operators only need to issue simple commands to complete complex jacking and lowering operations, reducing the possibility of human error and ensuring the safety of operators.
[0013] Furthermore, the self-locking support mechanism also includes a spring, which is arranged radially along the support base within the first inner cavity and located between the inner wall of the first inner cavity and the side wall of the slider, so as to elastically support the slider.
[0014] The beneficial effects of adopting the above technical solution are: the spring setting makes the slider always tend to move towards the axis of the support base when it is not subjected to other external forces, thereby strongly locking the locking teeth in the slot, ensuring that the support column will not slide down due to unexpected situations during the lifting process, and improving the support reliability of the self-locking support mechanism for the lifted object.
[0015] Furthermore, the self-locking support mechanism also includes a guide post, which is located inside the first inner cavity and coaxially arranged with the spring. The first end of the guide post is vertically fixed on the inner side wall of the first inner cavity. The slider has a guide hole corresponding to the guide post. The guide post is slidably assembled in the guide hole, and an assembly gap is reserved between the bottom wall of the guide hole and the end of the guide post to facilitate the slider sliding along the axial direction of the guide post. The spring is coaxially sleeved on the outer side wall of the guide post.
[0016] The beneficial effects of adopting the above technical solution are as follows: the guide post and the guide hole on the slider cooperate to provide precise guidance for the radial movement of the slider, ensuring that the slider always maintains a stable linear motion state during the movement, avoiding phenomena such as skewing and jamming when the slider is under force, improving the motion accuracy and reliability of the self-locking support mechanism, and also ensuring that the spring always works normally along its axial direction, thereby ensuring that the spring force can act stably on the slider, making the engagement between the slider and the locking teeth tighter and more reliable, and improving the self-locking effect.
[0017] Furthermore, the electrically controlled unlocking assembly includes an electric push rod and a push plate. The electric push rod is installed in the second inner cavity, and its output direction is arranged radially along the support base. One side plate of the push plate is vertically fixed to the output end of the electric push rod. A reset groove is formed on one side wall of the push plate corresponding to the slider. The reset groove extends radially along the support base. The end of the push plate away from the electric push rod is assembled in the reset groove. The electric push rod is electrically connected to the PLC controller to control and push the slider to slide in an axial direction away from the support base.
[0018] The beneficial effects of adopting the above technical solution are: the output direction of the electric push rod is arranged radially along the support base, which can directly and accurately act on the reset groove of the slider, thereby pushing the slider to slide in a direction away from the axis of the support base, realizing the reliable disengagement of the slider from the locking teeth on the support column, the reset action is accurate and stable, and effectively avoids the situation where the slider fails to reset due to problems such as jamming.
[0019] Furthermore, the self-locking support mechanism also includes limiting posts. The assembly hole is provided with a plurality of limiting holes spaced apart on the side wall corresponding to the second inner cavity. The limiting posts are multiple and are slidably assembled in the limiting holes respectively. One end of the limiting post is fixedly installed on the side wall of the push plate so that the electric push rod drives the limiting post to move radially along the assembly hole. An annular protrusion is integrally fixed at the bottom edge of the support post. The side wall of the end of the limiting post that extends into the assembly hole can abut against the upper end face of the annular protrusion to limit and stop the annular protrusion.
[0020] The beneficial effects of adopting the above technical solution are as follows: the limiting post is driven by an electric push rod and works in coordination with the reset action of the slider. When it is necessary to unlock the support post, the electric push rod pushes the limiting post to move, causing it to separate from the annular protrusion, thereby precisely controlling the unlocking and reset process of the support post and ensuring accurate positioning of the support post at different working stages.
[0021] Furthermore, the hydraulic station includes a drive motor, an oil pump, and an oil tank. The output end of the drive motor is connected to the input end of the oil pump. The oil inlet of the oil pump is connected to the oil tank. Multiple control valve groups are connected in parallel to the oil outlet of the oil pump. Multiple hydraulic jacks are connected to the oil outlets of the multiple control valve groups one by one. The control valve groups are solenoid valve groups. Both the drive motor and the solenoid valve groups are electrically connected to the PLC controller.
[0022] The beneficial effects of adopting the above technical solution are as follows: Under the control of the PLC controller, the solenoid valve assembly can accurately control the flow direction and flow rate of hydraulic oil, thereby achieving precise control of multiple hydraulic jacks, ensuring that the extension and retraction of each jack meets expectations, and improving the control accuracy and working efficiency of the entire lifting system; it also enables centralized control and automated operation. Operators do not need to manually operate the hydraulic valves, reducing operational difficulty and error rate, while improving the system's automation level and working efficiency.
[0023] Furthermore, it also includes a pressure and displacement dual closed-loop control module, which includes a pressure sensor mounted on the top of the hydraulic jack and a displacement sensor mounted on the top side wall of the hydraulic jack. Both the pressure sensor and the displacement sensor are connected to the signal input terminal of the PLC controller via signal cables to achieve synchronous lifting and load balancing of multiple hydraulic jacks.
[0024] The beneficial effects of adopting the above technical solution are as follows: Displacement sensors monitor the extension and retraction displacement of each hydraulic jack in real time and feed the data back to the PLC controller. The PLC controller precisely adjusts the hydraulic oil flow of each jack based on the displacement difference, thereby achieving synchronous lifting and avoiding tilting or damage to the object due to asynchrony, and improving the accuracy and quality of the lifting operation. Pressure sensors monitor the load pressure borne by each hydraulic jack in real time and feed the data back to the PLC controller. The PLC controller precisely adjusts the hydraulic oil pressure of each jack based on the pressure difference, achieving load balance and preventing damage to the hydraulic system or deformation of the object caused by uneven load, thus enhancing the stability and safety of the system. In other words, the dual closed-loop control enables the hydraulic jacks to respond and adjust rapidly when displacement changes or load fluctuations occur, ensuring smooth lifting operations and improving the system's adaptability and reliability to complex working conditions.
[0025] Furthermore, the hydraulic jack includes a lifting hydraulic jack and a lateral pushing hydraulic jack, and the control valve group includes a lifting control valve interface and a lateral movement control valve interface respectively connected to the lifting hydraulic jack and the lateral pushing hydraulic jack.
[0026] The beneficial effects of adopting the above technical solution are: the lifting hydraulic jack is responsible for the vertical lifting of the object, and the horizontal pushing hydraulic jack is responsible for the horizontal movement of the object. This structure realizes precise motion control of the object in the vertical and horizontal directions, making the system functions more diversified and able to meet the needs of object position adjustment in different scenarios.
[0027] Furthermore, the top of the hydraulic jack is also equipped with a weighing sensor to detect the supporting weight of its lifting end, and the weighing sensor is connected to the signal input terminal of the PLC controller.
[0028] The beneficial effects of adopting the above technical solution are: the weighing sensor can detect the weight supported by each hydraulic jack lifting end in real time. This data is transmitted to the PLC controller via signal cable, providing operators with immediate load feedback, making it easier to have a clear understanding of the weight distribution during the lifting operation, and thus to more accurately control the overall lifting operation.
[0029] Furthermore, a touch screen is embedded in the equipment box, and the touch screen is electrically connected to the data interface of the PLC controller.
[0030] The beneficial effects of adopting the above technical solution are: the touch screen provides an intuitive graphical interface, and operators can directly select, adjust and monitor various action parameters of the hydraulic jack on the screen through simple touch operations, which greatly improves the convenience and ease of use of operation. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0032] Figure 1 This is a schematic diagram of the equipment box of this utility model.
[0033] Figure 2 This is a schematic diagram of the intelligent control system of the PLC numerical control mobile hydraulic jacking equipment of this utility model.
[0034] Figure 3This is a structural diagram of the synchronous lifting state of the hydraulic jack and self-locking support mechanism of this utility model.
[0035] Figure 4 This is a cross-sectional view of the self-locking support mechanism of this utility model in the lifting state.
[0036] Figure 5 This is a cross-sectional view of the self-locking support mechanism of this utility model in its stowed state.
[0037] Among them, 100-equipment box, 101-touch screen, 1-hydraulic station, 11-drive motor, 12-oil pump, 121-control valve group, 13-oil tank, 2-hydraulic jack, 21-lifting hydraulic jack, 22-horizontal push hydraulic jack, 3-self-locking support mechanism, 31-support base, 311-assembly hole, 3111-boosting spring, 312-first inner cavity, 313-slider, 3131-slot, 3132-reset slot, 314-second inner cavity, 315-limiting post, 32-support post, 321-locking tooth, 33-electric unlocking component, 331-electric push rod, 332-push plate, 34-spring, 35-guide post, 4-PLC controller. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0039] This utility model discloses an intelligent control system for a PLC-controlled mobile hydraulic jacking device, comprising: an equipment box 100, a hydraulic station 1, a self-locking support mechanism 3, and a PLC controller 4. The equipment box 100 has wheels at its lower end. The hydraulic station 1 is installed inside the equipment box 100, and its hydraulic output end is connected in parallel to multiple hydraulic jacks 2. Multiple self-locking support mechanisms 3 are spaced apart between adjacent hydraulic jacks 2 and support the jacking operation together. The support includes a support base 31, a support column 32, and multiple sets of electrically controlled unlocking components 33. The support base 31 has mounting holes 311 along its supporting direction. A booster spring 3111 is coaxially installed in the mounting holes 311. The support column 32 is vertically movable within the mounting holes 311, and its bottom end abuts against the elastic end of the booster spring 3111. The top surface of the support column 32 can abut against the bottom surface of the object being lifted. The outer side wall of the support column 32 is circumferentially arranged with locking teeth 321, and the locking teeth 321 are all along the support column 32. The support base 31 is arranged with its axis tilting downwards. Multiple first inner cavities 312 are spaced apart circumferentially on its inner side. Each first inner cavity 312 is open on one side corresponding to the axis of the support base 31. Multiple sliders 313 are elastically installed in each first inner cavity 312, and each slider 313 can reciprocate radially along the support base 31. Each slider 313 has a slot 3131 on its side wall facing the axis of the support base 31, which engages with a locking tooth 321. The locking tooth 321 is adapted to engage... The support base 31 is positioned inside the slot 3131 to prevent the support column 32 from descending. The support base 31 has multiple second inner cavities 314 below the multiple first inner cavities 312. Multiple sets of electrically controlled unlocking components 33 are installed inside the multiple second inner cavities 314, and their drive ends are connected to multiple sliders 313 to push the sliders 313 to unlock the engagement state of the locking teeth 321 and the slot 3131. The PLC controller 4 is installed inside the equipment box 100 and is electrically connected to the hydraulic station 1 and the multiple electrically controlled unlocking components 33.
[0040] In a specific embodiment of the self-locking support mechanism 3 of this utility model, the self-locking support mechanism 3 further includes a spring 34. The spring 34 is arranged radially along the support base 31 within the first inner cavity 312 and is located between the inner side wall of the first inner cavity 312 and the side wall of the slider 313 to elastically support the slider 313. The spring 34 ensures that the slider 313 always tends to move towards the axis of the support base when no other external force is applied, thereby strongly locking the locking teeth 321 into the slots 3131, ensuring that the support column 32 will not slide down due to unexpected circumstances during the lifting process, and improving the reliability of the self-locking support mechanism 3 in supporting the lifted object.
[0041] In the above embodiment, the self-locking support mechanism 3 further includes a guide post 35. The guide post 35 is located inside the first inner cavity 312 and is coaxially arranged with the spring 34. The first end of the guide post 35 is vertically fixed on the inner side wall of the first inner cavity 312. The slider 313 has a guide hole corresponding to the guide post 35. The guide post 35 is slidably assembled in the guide hole, and an assembly gap is reserved between the bottom wall of the guide hole and the end of the guide post 35 so that the slider 313 can slide along the axial direction of the guide post 35. The spring 34 is coaxially sleeved on the outer side wall of the guide post 35. The guide post 35 cooperates with the guide hole on the slider 313 to provide precise guidance for the radial movement of the slider 313, ensuring that the slider 313 always maintains a stable linear motion state during the movement, avoiding phenomena such as skewing or jamming when the slider 313 is under force, improving the motion accuracy and reliability of the self-locking support mechanism 3, and also ensuring that the spring 34 always works normally along its axial direction, thereby ensuring that the elastic force of the spring 34 can act stably on the slider 313, making the engagement between the slider 313 and the locking tooth 321 tighter and more reliable, and improving the self-locking effect.
[0042] In a specific embodiment of the present invention, the electrically controlled unlocking component 33 includes an electric push rod 331 and a push plate 332. The electric push rod 331 is installed in the second inner cavity 314 and its output direction is arranged radially along the support base 31. One side plate of the push plate 332 is vertically installed on the output end of the electric push rod 331. A reset groove 3132 is provided on one side wall of the slider 313 corresponding to the push plate 332. The reset groove 3132 extends radially along the support base 31. The end of the push plate 332 away from the electric push rod 331 is fitted into the reset groove 3132. The electric push rod 331 is electrically connected to the PLC controller 4 to control the slider 313 to slide in the axial direction away from the support base 31. The output direction of the electric push rod 331 is arranged radially along the support base 31, which can directly and accurately act on the reset groove 3132 of the slider 313, thereby pushing the slider 313 to slide in a direction away from the axis of the support base 31, realizing the reliable disengagement of the slider 313 from the locking teeth 321 on the support column 32. The reset action is accurate and stable, effectively avoiding the situation where the slider 313 fails to reset due to jamming or other problems.
[0043] In the above embodiment, the self-locking support mechanism 3 further includes limiting posts 315. Multiple limiting holes are spaced apart on the side wall of the second inner cavity 314 corresponding to the assembly hole 311. Multiple limiting posts 315 are slidably assembled within the limiting holes. One end of each limiting post 315 is fixedly mounted on the side wall of the push plate 332, so that the electric push rod 331 drives the limiting post 315 to move radially along the assembly hole 311. An annular protrusion is integrally fixed to the bottom edge of the support column 32. The side wall of the limiting post 315 extending into the assembly hole 311 can abut against the upper surface of the annular protrusion to limit and stop its movement. The limiting post 315 is driven by the electric push rod 331 and works in conjunction with the reset action of the slider 313. When it is necessary to unlock the support column 32, the electric push rod 331 pushes the limiting post 315 to move, separating it from the annular protrusion, thereby precisely controlling the unlocking and reset process of the support column 32 and ensuring accurate positioning of the support column 32 at different working stages.
[0044] The embodiment of the hydraulic station in this utility model includes a drive motor 11, an oil pump 12, and an oil tank 13. The output end of the drive motor 11 is connected to the input end of the oil pump 12. The oil inlet of the oil pump 12 is connected to the oil tank 13. Multiple control valve groups 121 are connected in parallel to the oil outlet of the oil pump 12. Multiple hydraulic jacks 2 are connected one-to-one to the oil outlets of the multiple control valve groups 121. The control valve groups 121 are solenoid valve groups. Both the drive motor 11 and the solenoid valve groups are electrically connected to the PLC controller 4. Under the control of the PLC controller 4, the solenoid valve groups can accurately control the flow direction and flow rate of the hydraulic oil, thereby achieving precise control of multiple hydraulic jacks, ensuring that the extension and retraction of each jack meets expectations, improving the control accuracy and working efficiency of the entire lifting system; and enabling centralized control and automated operation. Operators do not need to manually operate the hydraulic valves, reducing the difficulty of operation and the error rate, while improving the automation level and working efficiency of the system.
[0045] Specifically, the solenoid valve assembly includes a solenoid pressure regulating valve, a solenoid directional valve, a balance valve, and a lock-up valve connected in series. A relief valve is also connected in parallel between the oil tank and the pressure regulating valve. The inlet of the solenoid pressure regulating valve is connected to the oil tank, used to pressurize the hydraulic oil in the tank to a set pressure value and output the pressurized hydraulic oil. The solenoid directional valve is a proportional directional valve; its inlet is connected to the outlet of the solenoid pressure regulating valve. It controls the flow of hydraulic oil by receiving electrical signals to achieve the extension and retraction of the hydraulic jack, and can adjust the hydraulic oil flow according to the strength of the electrical signal, thereby controlling the movement speed of the hydraulic jack. The relief valve is connected in parallel with the solenoid pressure regulating valve. When the hydraulic system pressure exceeds the set value, the relief valve opens, allowing the hydraulic oil to flow back to the oil tank, providing safety protection. Functions: The inlet of the balance valve is connected to the working port of the proportional directional valve, and the other port is connected to the inlet of the hydraulic jack. It is used to stabilize the oil pressure during the movement of the hydraulic jack, prevent the hydraulic jack from losing control due to its own weight or sudden changes in external load, and ensure its smooth operation. The inlet of the lock-up valve is connected to the outlet of the hydraulic jack, and the other port is connected to the oil tank. It is used to cut off the return oil path of the hydraulic jack when the hydraulic jack needs to be held in a specific position, so that the hydraulic jack is locked and prevented from falling or moving due to oil backflow when there is no operation.
[0046] In addition, the oil tank 13 is also equipped with a heat exchanger and a level gauge. During the operation of the oil tank system, the oil temperature may rise due to the normal operation of the equipment. The heat exchanger can dissipate the excess heat in the oil, keeping the oil temperature within a relatively stable range and ensuring that the system can work at a suitable oil temperature. The level gauge can monitor the oil level in the tank in real time to ensure that the oil volume in the tank is within a suitable range. If the oil level in the tank is too low, it may cause the equipment to malfunction due to insufficient oil supply during operation.
[0047] In the above embodiment of the hydraulic station, to improve the control accuracy, a pressure and displacement dual closed-loop control module is also included. The pressure and displacement dual closed-loop control module includes a pressure sensor mounted on the top of the hydraulic jack 2 and a displacement sensor mounted on the top side wall of the hydraulic jack. Both the pressure sensor and the displacement sensor are connected to the signal input terminal of the PLC controller 4 to realize the synchronous lifting and lowering of multiple hydraulic jacks 2 and load balancing. Displacement sensors monitor the telescopic displacement of each hydraulic jack 2 in real time and feed the data back to the PLC controller 4. The PLC controller 4 precisely adjusts the hydraulic oil flow of each jack based on the displacement difference, thereby achieving synchronous lifting and avoiding tilting or damage to the object due to asynchrony, and improving the accuracy and quality of the lifting operation. Pressure sensors monitor the load pressure borne by each hydraulic jack 2 in real time and feed the data back to the PLC controller 4. The PLC controller 4 precisely adjusts the hydraulic oil pressure of each jack based on the pressure difference, achieving load balance and preventing damage to the hydraulic system or deformation of the object caused by uneven load, thereby enhancing the stability and safety of the system. In other words, the dual closed-loop control enables the hydraulic jacks to respond and adjust quickly when the displacement changes or the load fluctuates, ensuring smooth lifting operations and improving the system's adaptability and reliability to complex working conditions.
[0048] In the above embodiments, to improve its practicality, the hydraulic jack 2 includes a lifting hydraulic jack 21 and a horizontal pushing hydraulic jack 22. The solenoid valve assembly includes a lifting control valve interface and a horizontal movement control valve interface, respectively connected to the lifting hydraulic jack 21 and the horizontal pushing hydraulic jack 22. The lifting hydraulic jack 21 is responsible for the vertical lifting of the object, and the horizontal pushing hydraulic jack 22 is responsible for the horizontal movement of the object. This structure enables precise motion control of the object in both vertical and horizontal directions, making the system more versatile and able to meet the needs of object position adjustment in different scenarios.
[0049] See Figure 2 The diagram shows the oil lines connecting the valve block interface to the jacks, arranged in order from 1 to 6. Interfaces 1 to 4 connect to the vertical jacks and play a crucial role in the system for synchronous lifting and lowering. When the system performs lifting operations, high-pressure oil is precisely delivered to the vertical jacks through these interfaces, propelling them upwards smoothly and ensuring that multiple jacks operate in a coordinated manner to achieve synchronous lifting of the object. During the synchronous lowering phase, the oil return path is also controlled in an orderly manner through interfaces 1 to 4, ensuring that each jack descends at the same speed and stroke, maintaining the stability of the object being lifted and preventing dangerous situations such as tilting or swaying.
[0050] Interfaces 5 and 6 connect to the lateral movement cylinder, primarily used for synchronous lateral pushing and pulling operations. In operations involving lateral displacement, these two interfaces become crucial channels for controlling the movement of the lateral movement cylinder. Through them, the hydraulic system can precisely control the flow and pressure of the hydraulic fluid, driving the lateral movement cylinder to achieve synchronous lateral pushing or pulling movements, thereby completing precise horizontal displacement operations for various equipment and components, meeting diverse engineering operation needs.
[0051] In the above embodiment, the top of the lifting hydraulic jack 21 is also equipped with a load cell to detect the supporting weight of its lifting end. The load cell is connected to the signal input terminal of the PLC controller 4. The load cell can detect the weight supported by the lifting end of each lifting hydraulic jack 21 in real time. This data is transmitted to the PLC controller 4 via a signal cable, providing the operator with immediate load feedback, facilitating a clear understanding of the weight distribution during the lifting operation, and thus enabling more precise control of the overall lifting operation.
[0052] The system uses high-precision load cells to collect pressure signals and convert them into weight data. When an object is placed on a support platform, the load cell generates an electrical signal proportional to the object's weight. This signal is amplified, filtered, and preprocessed before being transmitted to the control system. The control system first performs zero-point calibration and full-scale calibration to eliminate the influence of sensor errors and environmental interference, ensuring the accuracy of the measurement data. During the actual weighing process, the system compares the measured weight with the preset weight range in real time. Once the weight exceeds the set threshold, an alarm mechanism is immediately triggered for fault diagnosis and alarm. The system monitors the operating status in real time, and when a system fault is detected, it can promptly diagnose the fault and issue an alarm signal to remind the operator to handle the situation.
[0053] In the above embodiments, to facilitate control and process monitoring, a touch screen display 101 is embedded in the equipment box 100. The touch screen display 101 is electrically connected to the data interface of the PLC controller 4. The touch screen display 101 provides an intuitive graphical interface, allowing operators to directly select, adjust, and monitor various action parameters of the hydraulic jack 2 on the screen through simple touch operations, greatly improving the convenience and ease of use of operation.
[0054] The real-time data displayed on the touch screen during operation is remotely transmitted to the screen via a wireless transmitter and receiver for real-time observation and control. At the same time, the on-site operation data can be observed in real time without distance via a mobile APP.
[0055] The touch screen includes a hardware management module, which mainly performs self-tests on various hardware components before use to ensure normal operation; a communication module with the strongest real-time performance, where serial communication between the touch screen and the PLC is completed; a real-time monitoring module, which mainly performs dynamic decision-making and optimization control on the pressure and displacement of each cylinder, displays the data in real time, and can also observe the data as dynamic curves, facilitating the monitoring of the entire process of pressure and displacement changes; and a data processing module, which can store the system's initialization parameters and real-time database, and can also print data reports.
[0056] The touchscreen display also features a monitoring system, primarily responsible for human-machine interaction. The parameter setting interface provides settings for control parameters before system operation, including pump station selection, displacement sensor grouping, hydraulic cylinder and displacement sensor association, and synchronization accuracy. These parameter settings can be saved in the project and do not need to be reset the next time they are used if there are no changes. The weighing, lifting, and translation interfaces are mainly used to display pressure and displacement in the form of data. If you want to observe the real-time trend of pressure and displacement changes, simply switch to the dynamic curve interface. The single-cylinder debugging interface can be called up at any time to perform human-machine interaction and adjust the pressure rise and fall of the selected hydraulic cylinder.
[0057] The working principle of the intelligent control system for a PLC numerical control mobile hydraulic jacking equipment of this utility model is as follows:
[0058] Move the equipment box to the location where the object needs to be lifted. The hydraulic station starts working, and multiple hydraulic jacks connected in parallel at its output end move synchronously to lift the object upwards. During the lifting process, because the top of the support column of the self-locking support mechanism abuts against the bottom support surface of the object being lifted, and its bottom is elastically installed in the assembly hole through a booster spring, when the object being lifted is subjected to the lifting force of the hydraulic jacks, the support column is subjected to the booster spring force, allowing it to rise together with the object being lifted. When the hydraulic jacks stop lifting, or if one or more of them malfunction or fail, the support column is subjected to the downward pressure of the object being lifted, causing its outer peripheral wall to lock. The teeth engage with the slots on the slider in the first inner cavity of the support base. Under elastic action, the slider locks the teeth, preventing the support column from descending and ensuring it supports the object, preventing localized deformation and damage. When it is necessary to lower the lifted object, the PLC controller activates the electronic unlocking component. The drive end of the electronic unlocking component pushes the slider, disengaging the slots on the slider from the teeth and releasing the locking of the support column. This allows the support column to move downwards along the axial direction of the mounting hole. At this time, under the control of the hydraulic station, the hydraulic jack slowly retracts, lowering the support column and ultimately achieving a smooth descent of the object. Therefore, this PLC-controlled hydraulic lifting system, through its self-locking support mechanism, provides reliable support in case of hydraulic system failure, preventing accidents caused by sudden object falls. Furthermore, during the lifting process, the support for the object is more stable, reducing the risk of tilting and damage.
[0059] Therefore, the lifting system achieves automated control by using a PLC controller. Operators only need to issue simple commands to complete complex lifting and lowering operations, reducing the possibility of human error and ensuring the safety of operators. At the same time, it relies on a self-locking support mechanism for auxiliary support, which greatly improves the stability of the support.
[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.
[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A PLC-controlled intelligent control system for a mobile hydraulic jacking device, characterized in that, include: Equipment box (100), the lower end of which has wheels; Hydraulic station (1), the hydraulic station (1) is installed in the equipment box (100), and its hydraulic output end is connected in parallel to multiple hydraulic jacks (2); The self-locking support mechanism (3) consists of multiple self-locking support mechanisms (3) arranged at intervals between two adjacent hydraulic jacks (2) and supporting the lifting together. The self-locking support mechanism (3) includes a support base (31), a support column (32), and multiple sets of electrically controlled unlocking components (33). The support base (31) has an assembly hole (311) along its support direction. A booster spring (3111) is coaxially installed in the assembly hole (311). The support column (32) The support column (32) is located within the mounting hole (311) and its bottom end abuts against the elastic end of the booster spring (3111). The top surface of the support column (32) abuts against the bottom surface of the object being lifted. The outer side wall of the support column (32) is circumferentially arranged with locking teeth (321), and the locking teeth (321) are all inclined downward along the axial direction of the support column (32). The inner side of the support base (31) is provided with a plurality of first inner cavities (312) spaced apart circumferentially. Each of the first inner cavities (312) has an opening on one side corresponding to the axis of the support base (31). Multiple sliders (313) are elastically installed in each of the first inner cavities (312), and each slider (313) can reciprocate radially along the support base (31). Each slider (313) has a slot (3131) on its side wall facing the axis of the support base (31) that engages with the engaging teeth (321). The engaging teeth (321) are adapted to engage with... The slot (3131) is used to prevent the support column (32) from falling; the support base (31) has multiple second inner cavities (314) below the multiple first inner cavities (312), and multiple sets of electronically controlled unlocking components (33) are respectively installed inside the multiple second inner cavities (314) and their driving ends are respectively connected to multiple sliders (313) to push the sliders (313) to unlock the engagement state between the locking teeth (321) and the slot (3131); The PLC controller (4) is installed in the equipment box (100) and is electrically connected to the hydraulic station (1) and the multiple electrically controlled unlocking components (33).
2. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 1, characterized in that, The self-locking support mechanism (3) further includes a spring (34), which is arranged radially along the support base (31) in the first inner cavity (312) and located between the inner sidewall of the first inner cavity (312) and the sidewall of the slider (313) to elastically support the slider (313).
3. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 2, characterized in that, The self-locking support mechanism (3) further includes a guide post (35), which is located inside the first inner cavity (312) and coaxially arranged with the spring (34). The first end of the guide post (35) is vertically fixed on the inner side wall of the first inner cavity (312). The slider (313) has a guide hole corresponding to the guide post (35). The guide post (35) is slidably assembled in the guide hole, and an assembly gap is reserved between the bottom wall of the guide hole and the end of the guide post (35) so that the slider (313) can slide along the axial direction of the guide post (35). The spring (34) is coaxially sleeved on the outer side wall of the guide post (35).
4. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 1, characterized in that, The electrically controlled unlocking assembly (33) includes an electric push rod (331) and a push plate (332). The electric push rod (331) is installed in the second inner cavity (314) and its output direction is arranged radially along the support base (31). One side plate of the push plate (332) is vertically installed on the output end of the electric push rod (331). The slider (313) has a reset groove (3132) on one side wall corresponding to the push plate (332). The reset groove (3132) extends radially along the support base (31). One end of the push plate (332) away from the electric push rod (331) is fitted into the reset groove (3132). The electric push rod (331) is electrically connected to the PLC controller (4) to control and push the slider (313) to slide along the axis away from the support base (31).
5. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 4, characterized in that, The self-locking support mechanism (3) further includes a limiting post (315). The assembly hole (311) is provided with a plurality of limiting holes spaced apart on the side wall of the second inner cavity (314). The limiting post (315) is a plurality of such limiting posts and is slidably assembled in the limiting holes respectively. One end of the limiting post (315) is fixedly installed on the side wall of the push plate (332) so that the electric push rod (331) drives the limiting post (315) to move radially along the assembly hole (311). The bottom edge of the support post (32) is integrally fixed with an annular protrusion. The side wall of the end of the limiting post (315) that extends into the assembly hole (311) can abut against the upper end face of the annular protrusion to limit and stop the annular protrusion.
6. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 1, characterized in that, The hydraulic station includes a drive motor (11), an oil pump (12), and an oil tank (13). The output end of the drive motor (11) is connected to the input end of the oil pump (12). The oil inlet of the oil pump (12) is connected to the oil tank (13). Multiple control valve groups (121) are connected in parallel to the oil outlet of the oil pump (12). Multiple hydraulic jacks (2) are connected to the oil outlets of multiple control valve groups (121) one by one. The control valve group (121) is a solenoid valve group. The drive motor (11) and the solenoid valve group are both electrically connected to the PLC controller (4).
7. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 6, characterized in that, It also includes a pressure and displacement dual closed-loop control module, which includes a pressure sensor mounted on the top of the hydraulic jack (2) and a displacement sensor mounted on the top side wall of the hydraulic jack. Both the pressure sensor and the displacement sensor are connected to the signal input terminal of the PLC controller (4) to realize the synchronous lifting and load balancing of multiple hydraulic jacks (2).
8. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 6, characterized in that, The hydraulic jack (2) includes a lifting hydraulic jack (21) and a horizontal pushing hydraulic jack (22), and the solenoid valve group includes a lifting control valve interface and a horizontal movement control valve interface that are respectively connected to the lifting hydraulic jack (21) and the horizontal pushing hydraulic jack (22).
9. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to claim 8, characterized in that, The top of the lifting hydraulic jack (21) is also equipped with a weighing sensor to detect the supporting weight of its lifting end. The weighing sensor is connected to the signal input terminal of the PLC controller (4).
10. The intelligent control system for a PLC-controlled mobile hydraulic jacking device according to any one of claims 1-9, characterized in that, A touch screen display (101) is embedded in the equipment box (100), and the touch screen display (101) is electrically connected to the data interface of the PLC controller (4).