Wireless distributed synchronous lifting system and use method thereof

Abstract

The present invention relates to the field of synchronous fluid pressure actuators of two or more servo motors, and specifically to a wireless distributed synchronous jacking system and a method for using the same. A wireless distributed synchronous jacking system comprises an oil cylinder (1) and a distributed pump station (2), wherein the number of the oil cylinder (1) and the distributed pump station (2) are equal and not less than three, and is characterized in that: it also comprises a main control computer (3), each oil cylinder (1) is connected to a distributed pump station (2) through an oil pipeline; the distributed pump station (2) comprises a DC motor (21), a motor driver (22), an oil pressure sensor (23), a wireless communication module (24), a hydraulic module (25), an embedded controller (26) and a power supply (27). The present invention simplifies the equipment, has strong adaptability, and is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the field of synchronous fluid pressure actuators of two or more servo motors, and in particular to a wireless distributed synchronous jacking system and a method for using the same. Background Art

[0002] Synchronous jacking system is widely used in construction fields such as building maintenance and bridge bearing replacement. At present, various types of jacking equipment on the market are often centralized, that is, all hydraulic cylinders are powered by a unified large centralized pump station, and correspond to a set of automatic control systems, using proportional relief valves to control the flow of hydraulic oil. The control system controls the motors and valves in the centralized pump station to achieve synchronous control of the cylinders.

[0003] This centralized control system has the following problems: 1. There are many pipelines such as oil pipelines and cables, which are easily damaged accidentally at the construction site; 2. The size and weight of a single device are large, and its transportation and layout process often requires large lifting equipment; 3. The system has poor scalability and versatility. When the number of synchronization points changes, it is easy to cause channel waste, and it does not have complete single-point independent control capabilities; 4. It needs to be connected to power, and a generator is required for field construction, which increases construction costs and difficulty. Summary of the invention

[0004] In order to overcome the defects of the prior art and provide a simplified, adaptable, safe and reliable hydraulic device, the present invention discloses a wireless distributed synchronous jacking system and a method for using the same.

[0005] The present invention achieves the purpose of the invention through the following technical solutions:

[0006] A wireless distributed synchronous jacking system includes an oil cylinder and a distributed pump station, the number of the oil cylinder and the distributed pump station is equal and not less than three, and is characterized in that it also includes a main control computer,

[0007] Each oil cylinder is connected to a distributed pump station through an oil pipeline, and a displacement sensor is provided on the piston rod of the oil cylinder;

[0008] The distributed pump station includes a DC motor, a motor driver, an oil pressure sensor, a wireless communication module, a hydraulic module, an embedded controller and a power supply. The hydraulic module includes a valve, a pump head, an oil tank, an oil nozzle and an oil pressure sensor. The motor driver is connected to the DC motor through a signal line. The motor driver, the oil pressure sensor, the wireless communication module and the hydraulic module are all connected to the embedded controller through a signal line. The power supply is respectively connected to the DC motor, the motor driver, the oil pressure sensor, the wireless communication module, the hydraulic module and the embedded controller through wires. The output shaft of the DC motor is connected to the pump head of the hydraulic module.

[0009] The distributed pumping station is wirelessly connected to the main control computer via a wireless communication module.

[0010] The wireless distributed synchronous lifting system is characterized by:

[0011] The displacement sensor on the oil cylinder piston rod uses a pull rope displacement sensor;

[0012] The wireless communication module uses the LoRa wireless communication protocol;

[0013] In the hydraulic module: the oil tank is connected to the oil inlet end of the pump head through an oil pipe connected in series with a valve, the oil delivery end of the pump head is connected to the oil cylinder, the valve is provided with an oil pressure sensor and an oil nozzle, and the output shaft of the DC motor is connected to the pump head;

[0014] The power supply has a built-in power management module;

[0015] The operator performs read and write operations on the embedded controller through the human-computer interaction interface.

[0016] The method for using the wireless distributed synchronous lifting system is characterized by being implemented in sequence according to the following steps:

[0017] ① Arrange the oil cylinders according to the construction requirements, place the distributed pump station nearby, connect the oil pipeline, install the displacement sensor on the piston rod of the oil cylinder, and the valve of the hydraulic module is equipped with an oil pressure sensor. The stroke of the oil cylinder is measured by the displacement sensor, or the stroke of the oil cylinder lifting point is measured according to the on-site conditions;

[0018] ② Turn on the power button of each distributed pump station and start the self-test process on the main control computer to ensure that the oil pressure, displacement, and battery power data of each distributed pump station are normal;

[0019] ③ Create a new jacking project in the main control computer and input the displacement graded control target of each jacking point (the graded control table can be imported as the process control of jacking construction);

[0020] ④ Click the start button on the main control computer, and the main control computer drives each cylinder through the distributed pump station to start the first-level lifting control and lift the component. The main control computer will reset all displacement data at this time, and send the displacement control value and rate of each cylinder lifting point to the distributed pump station connected to the cylinder through calculation. After receiving the control target instruction, the distributed pump station implements local control on the corresponding connected cylinder according to the control target instruction through the embedded controller;

[0021] ⑤ When the current level is completed, the main control computer prompts the user. After the user clicks to start the next level, the main control computer starts the next level of control;

[0022] ⑥ And so on, until all lifting and lowering processes are completed according to the predetermined control target;

[0023] ⑦ During the jacking process, if any distributed pumping station has a displacement or oil pressure data alarm, the main control computer will suspend all distributed pumping stations; similarly, if any distributed pumping station fails to complete the control target of this level, the main control computer cannot start the next level of jacking control. In all abnormal situations, the system will prompt the user to intervene manually, and subsequent operations can only be carried out after the abnormal situation is eliminated.

[0024] The present invention discloses a wireless distributed synchronous jacking system, which adopts a miniaturized single-channel low-voltage DC pump station (which can be battery-powered) and realizes on-site wireless ad hoc network control through wireless communication technologies such as LoRa. Each single-point pump station is independently controlled by the on-site master control computer. The system will greatly improve the convenience, reliability and applicability of the site. Specifically, the technical features of the present invention are as follows:

[0025] 1. Fully distributed (each lifting point can be controlled independently) wireless control architecture;

[0026] 2. It adopts low-voltage DC motor design and is battery-powered (the default configuration battery can be used for one day. For long-term projects, it can be equipped with an external large-capacity battery or connected to 220V mains electricity). No large-scale power generation equipment is required.

[0027] 3. The PID control is used to adjust the motor speed to accurately control the lifting rate and displacement value; compared with the proportional relief valve control, it can greatly reduce the loss of functions and hydraulic components.

[0028] 4. Target hierarchical synchronous control: The distributed pumping stations are synchronously controlled through the system host. If any pumping station alarms or fails to complete the current level of control, the system cannot enter the next level of control and gives a prompt

[0029] 5. The present invention is not limited to synchronous jacking construction, but can also be applied to synchronous construction such as synchronous pushing and lifting.

[0030] The present invention has the following beneficial effects:

[0031] 1. Convenience: Greatly simplify the layout and construction of on-site equipment, pipelines, power supplies, etc., reduce construction costs, and improve efficiency

[0032] 2. High flexibility: the lifting points can be temporarily increased or decreased according to the lifting requirements or on-site conditions.

[0033] 3. High reliability: Compared with centralized solutions, there is no risk of large-scale failure of jacking points

[0034] 4. High real-time performance: Distributed pumping stations have high-speed local control and alarm functions. The main control computer only sends the target value and does not participate in the control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a system block diagram of a distributed pump station in the present invention;

[0037] Figure 3 It is a structural schematic diagram of the distributed pump station in the present invention. DETAILED DESCRIPTION

[0038] The present invention is further described below by means of specific examples.

[0039] Example 1

[0040] A wireless distributed synchronous jacking system includes an oil cylinder 1, a distributed pump station 2 and a main control computer 3. Figure 1 to Figure 3 As shown, the specific structure is:

[0041] The number of oil cylinders 1 and distributed pumping stations 2 is equal and not less than three, each oil cylinder 1 is connected to a distributed pumping station 2 through an oil pipeline, and a displacement sensor is provided on the piston rod of the oil cylinder 1;

[0042] Distributed pumping station 2 Figure 2 and Figure 3 As shown: the distributed pump station 2 includes a DC motor 21, a motor driver 22, an oil pressure sensor 23, a wireless communication module 24, a hydraulic module 25, an embedded controller 26 and a power supply 27. The hydraulic module 25 includes a valve 251, a pump head 252, an oil tank 253 and an oil nozzle 254. The motor driver 22 is connected to the DC motor 21 through a signal line. The motor driver 22, the oil pressure sensor 23, the wireless communication module 24 and the hydraulic module 25 are all connected to the embedded controller 26 through a signal line. The power supply 27 is respectively connected to the DC motor 21, the motor driver 22, the oil pressure sensor 23, the wireless communication module 24, the hydraulic module 25 and the embedded controller 26 through wires. The output shaft of the DC motor 21 is connected to the pump head 252 of the hydraulic module 25.

[0043] The distributed pump station 2 is wirelessly connected to the main control computer 3 via the wireless communication module 24 .

[0044] In this embodiment:

[0045] The displacement sensor on the piston rod of oil cylinder 1 is a pull-rope displacement sensor;

[0046] The wireless communication module 24 uses the LoRa wireless communication protocol;

[0047] Hydraulic module 25 such as Figure 3As shown: in the hydraulic module 25: the oil tank 253 is connected to the oil inlet end of the pump head 252 through an oil pipe connected in series with a valve 251, the oil delivery end of the pump head 252 is connected to the oil cylinder 1, the valve 251 is provided with an oil pressure sensor 23 and an oil nozzle 254, and the output shaft of the DC motor 21 is connected to the pump head 252;

[0048] The power supply 27 has a built-in power management module;

[0049] The operator performs read and write operations on the embedded controller 26 through the human-machine interaction interface 28 .

[0050] When this embodiment is used, the following steps are implemented in sequence:

[0051] ① Arrange the oil cylinder 1 according to the construction requirements, place the distributed pump station 2 nearby, connect the oil pipeline, install a displacement sensor on the piston rod of the oil cylinder 1, and provide an oil pressure sensor 23 on the valve 251 of the hydraulic module 25. Measure the stroke of the oil cylinder 1 through the displacement sensor, or measure the stroke of the jacking point of the oil cylinder 1 according to the on-site conditions;

[0052] ② Turn on the power button of each distributed pump station 2, start the self-check process on the main control computer 3, and ensure that the oil pressure, displacement, and battery power data of each distributed pump station 2 are normal;

[0053] ③ Create a new jacking project in the main control computer 3, and input the displacement graded control target of each jacking point (the graded control table can be imported as the process control of the jacking construction);

[0054] ④ Click the start button on the main control computer 3, and the main control computer 3 drives each cylinder 1 through the distributed pump station 2 to start the first-level lifting control, and lifts the component 4. The main control computer 3 will reset all displacement data at this time, and send the displacement control value and rate of each cylinder 1 lifting point to the distributed pump station 2 connected to the cylinder 1 through calculation. After receiving the control target instruction, the distributed pump station 2 implements local control on the corresponding connected cylinder 1 according to the control target instruction through the embedded controller 26;

[0055] ⑤ When the current level is completed, the main control computer 3 prompts the user, and after the user clicks to start the next level, the main control computer 3 starts the next level of control;

[0056] ⑥ And so on, until all lifting and lowering processes are completed according to the predetermined control target;

[0057] ⑦ During the jacking process, if any distributed pump station 2 has a displacement or oil pressure data alarm, the main control computer 3 will suspend all distributed pump stations 2; similarly, if any distributed pump station 2 fails to complete the control target of this level, the main control computer 3 cannot start the next level of jacking control. In all abnormal situations, the system will prompt the user to intervene manually, and subsequent operations can only be carried out after the abnormal situation is eliminated.

Claims

1. A wireless distributed synchronous jacking system, comprising an oil cylinder (1) and a distributed pump station (2), wherein the number of the oil cylinder (1) and the distributed pump station (2) is equal and not less than three, and wherein: It also includes a main control computer (3), Each oil cylinder (1) is connected to a distributed pump station (2) via an oil pipeline, and a displacement sensor is provided on the piston rod of the oil cylinder (1); The distributed pump station (2) comprises a DC motor (21), a motor driver (22), an oil pressure sensor (23), a wireless communication module (24), a hydraulic module (25), an embedded controller (26) and a power supply (27). The hydraulic module (25) comprises a valve (251), a pump head (252), an oil tank (253) and an oil nozzle (254). The motor driver (22) is connected to the DC motor (21) via a signal line. The motor driver (22), the oil pressure sensor (23), the wireless communication module (24) and the hydraulic module (25) are all connected to the embedded controller (26) via signal lines. The power supply (27) is respectively connected to the DC motor (21), the motor driver (22), the oil pressure sensor (23), the wireless communication module (24), the hydraulic module (25) and the embedded controller (26) via wires. The output shaft of the DC motor (21) is connected to the pump head (252) of the hydraulic module (25). The distributed pump station (2) is wirelessly connected to a main control computer (3) via the wireless communication module (24). The main control computer (3) drives each oil cylinder (1) to lift the component (4) through the distributed pump station (2) according to the displacement classification control target of each lifting point input.

2. The wireless distributed synchronous lifting system according to claim 1, characterized in that: The displacement sensor on the piston rod of the oil cylinder (1) is a pull-rope displacement sensor; The wireless communication module (24) uses the LoRa wireless communication protocol; In the hydraulic module (25): the oil tank (253) is connected to the oil inlet end of the pump head (252) through an oil pipe connected in series with a valve (251); the oil delivery end of the pump head (252) is connected to the oil cylinder (1); the valve (251) is provided with an oil pressure sensor (23) and an oil nozzle (254); and the output shaft of the DC motor (21) is connected to the pump head (252); The power supply (27) has a built-in power management module; The operator performs read and write operations on the embedded controller (26) through the human-machine interaction interface (28).

3. The method for using the wireless distributed synchronous lifting system according to claim 1 or 2, characterized in that: Follow the steps below to implement: ① Arrange the oil cylinder (1) according to the construction requirements, place the distributed pump station (2) nearby, connect the oil pipeline, install a displacement sensor on the piston rod of the oil cylinder (1), and provide an oil pressure sensor (23) on the valve (251) of the hydraulic module (25), and measure the stroke of the oil cylinder (1) or the stroke of the jacking point of the oil cylinder (1) through the displacement sensor; ② Turn on the power button of each distributed pump station (2), start the self-check process on the main control computer (3), and ensure that the oil pressure, displacement, and battery power data of each distributed pump station (2) are normal; ③ Create a new jacking project in the main control computer (3) and input the displacement classification control target of each jacking point; ④ Click the start button on the main control computer (3), and the main control computer (3) drives each cylinder (1) through the distributed pump station (2) to start the first-level lifting control, and lifts the component (4). The main control computer (3) will reset all displacement data at this time, and send the displacement control value and rate of each cylinder (1) lifting point to the distributed pump station (2) connected to the cylinder (1) through calculation. After receiving the control target instruction, the distributed pump station (2) implements local control on the corresponding connected cylinder (1) according to the control target instruction through the embedded controller (26); ⑤ When the current level is completed, the main control computer (3) prompts the user, and after the user clicks to start the next level, the main control computer (3) starts the next level of control; ⑥ And so on, until all lifting and lowering processes are completed according to the predetermined control target; ⑦ During the lifting process, if any distributed pump station (2) has a displacement or oil pressure data alarm, the main control computer (3) will suspend all distributed pump stations (2); similarly, if any distributed pump station (2) fails to complete the control target of this level, the main control computer (3) cannot start the next level of lifting control. In all abnormal situations, the system will prompt the user to intervene manually, and subsequent operations can only be carried out after the abnormal situation is eliminated.

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