Full-automatic deviation rectifying device controlled by PLC (Programmable Logic Controller)

Abstract

The utility model relates to the technical field of tide gate control, and discloses a full-automatic deviation rectifying device controlled by a PLC (Programmable Logic Controller). A tide gate lifting deviation correction control module; a PLC control module; a touch display screen; a sensor and a controller in the tide gate lifting deviation rectification control module are connected through a cable, the controller is connected with the PLC control module through a communication interface, and the integrated hydraulic hoist and the touch display screen are both connected with the PLC control module. The integrated hydraulic hoist comprises a hydraulic pump, a motor and an electromagnetic valve, wherein the hydraulic pump is used for controlling opening and closing of the gate and deviation rectification control. According to the utility model, the failure rate of gate lifting is reduced (by 90%), the operation efficiency is improved, and the operation time is shortened to 30 seconds through the PLC self-control deviation rectifying equipment; the labor cost is saved, one person can operate in place, the maintenance cost is saved, and a PLC engineer does not need to remove faults on site unless serious faults occur through the PLC self-control deviation rectifying equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of tide gate control, in particular to the deviation correction control of tide gates, and specifically is a full-automatic deviation correction device controlled by a PLC. Background Art

[0002] Tidal gates are sluices located near tidal river mouths, used to block tides, prevent brine, and drain water. During high tide, when the water level is higher than the river level, the gates are closed to prevent the tide. During low tide, when the water level is lower than the river level, the gates are opened to drain water. Tidal gates, with their bidirectional water blocking and frequent operation, are difficult to maintain.

[0003] After searching, patent application number CN201921766879.5 discloses a double-gate system for a tide gate, comprising a main gate system and a secondary gate system with a one-way water flow function connected in series with the main gate system. The main gate system includes a main gate and a hoist. The main gate is installed in a gate slot pre-opened at a set position in the flow channel of the gate chamber. The hoist is installed above the main gate, which is connected to the main gate and provides power to control the opening and closing of the main gate. The secondary gate system includes a secondary gate frame and a secondary gate. The secondary gate frame is fixed to the flow channel of the gate chamber. The secondary gate includes at least two secondary gate plates hinged from top to bottom, with the uppermost secondary gate plate hinged to the secondary gate frame. The main gate system of this utility model is dedicated to drainage and river water level control, while the secondary gate system is dedicated to tide control. The two systems work together to solve the problem of balancing water resource regulation with water environment and water ecological management.

[0004] In actual operation, operators do not have the ability to program and correct deviations, and sometimes they have to leave the monitoring console in the central control room and go to the gate site to check the opening and closing balance. They cannot see the gate's takeoff and lowering through the monitoring. The left and right opening and closing errors of a single gate are large, and the imbalance in the gate's takeoff and lowering often leads to takeoff and landing failures.

[0005] In existing technology, after years of operation, when mechanical equipment or limit sensor measurement errors occurred, the tidal gate equipment needed to enter the PLC system program to adjust the relevant parameters to ensure normal operation. The original supplier was an out-of-town manufacturer, and each repair cost was relatively high and the timeliness was poor.

[0006] Therefore, we need to propose a fully automatic deviation correction device controlled by PLC, so that the on-duty personnel can adjust the relevant process parameters at any time in the control room according to the on-site situation to reduce the failure rate of the equipment. Utility Model Content

[0007] The purpose of this utility model is to provide a fully automatic correction device controlled by PLC, which reduces the failure rate of gate lifting and lowering (reduces the failure rate by 90%), improves operating efficiency, saves labor costs, and can be operated by one person, saving maintenance costs. PLC engineers are no longer needed for on-site troubleshooting, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fully automatic deviation-correcting device controlled by a PLC, comprising:

[0009] Multiple integrated hydraulic hoists for driving the raising and lowering of tide gates;

[0010] Tide gate lift and correction control modules that integrate multiple sensors and controllers and monitor gate position and status in real time;

[0011] PLC control module responsible for receiving sensor signals, processing data, and issuing control instructions;

[0012] Touch screen display for configuring and setting device variables, signal source combinations, position sensors, and control parameters;

[0013] The sensor and controller in the tide gate lifting and lowering correction control module are connected by a cable, the controller is connected to the PLC control module through a communication interface, and the integrated hydraulic hoist and touch display are both connected to the PLC control module.

[0014] Preferably, the integrated hydraulic gate opening and closing machine includes a hydraulic pump, a motor, and a solenoid valve for controlling the opening and closing of the gate and the deviation correction control, and the PLC control module is connected to the hydraulic pump, the motor, and the solenoid valve through an output module.

[0015] Preferably, the equipment variables of the integrated hydraulic hoist include: hydraulic oil temperature, hydraulic oil pressure, cylinder stroke, and motor current;

[0016] The equipment variables of the tide gate lifting and lowering correction control module include the opening of the tide gate, the stroke difference of the oil cylinders at both ends of the tide gate, and the correction control signal;

[0017] The device variables of the PLC control module include input signals, output signals, and fault alarm signals.

[0018] Preferably, the sensor is configured as an opening meter or a displacement sensor capable of monitoring the gate operation status in real time, and the gate operation status includes the gate opening, position and cylinder stroke.

[0019] Preferably, the parameters of the displacement sensor include range, resolution, and zero point calibration, and the displacement sensor is selected from any one of a grating sensor, a magnetostrictive displacement sensor, and a potentiometer displacement sensor.

[0020] Preferably, there are 23 tide gate gate lifting and lowering correction control modules, and 2 PLC control modules, one of which controls 12 tide gate gate lifting and lowering correction control modules, and the other PLC control module controls 11 tide gate gate lifting and lowering correction control modules.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This utility model reduces the failure rate of gate lifting and lowering in large tidal dam applications (reducing the failure rate by 90%) and improves operational efficiency. Previously, lifting and lowering gates required repeated corrections on the host computer, resulting in a high failure rate and requiring 1-2 minutes to lift and lower a gate. Now, with the PLC automatic correction device, the time is shortened to 30 seconds.

[0023] 2. This new model saves labor costs. Originally, when a correction failure occurred, two people were needed, one to operate the host computer and one to check on site. Now the failure rate is reduced by 90%, and one person can operate it in place.

[0024] 3. The utility model saves maintenance costs. In the past, every time a gate correction failure occurred, a PLC engineer would need to come to the site to enter the PLC system for troubleshooting. Now, with the PLC automatic control correction equipment, unless a serious failure occurs, there is no need for a PLC engineer to troubleshoot on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the system frame of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1The utility model provides a technical solution: a fully automatic deviation correction device controlled by a PLC. This device adds relevant equipment variables to the PLC program, transmits the program variables and signal source combination in the PLC control cabinet to the touch screen of the PLC automatic deviation correction device, and configures the relevant setting parameters of the displacement sensor on the touch screen. In this way, the on-duty personnel can adjust the relevant process parameters at any time in the central control room according to the on-site situation, thereby reducing the failure rate of the equipment, including:

[0028] Multiple integrated hydraulic hoists are used to raise and lower the tidal gates; specifically, this solution includes 46 of these hoists. These hoists are powered by a hydraulic system, enabling smooth, rapid, and precise control of the gates.

[0029] Tide gate lift and correction control modules that integrate multiple sensors and controllers and monitor gate position and status in real time;

[0030] Sensors are used to monitor the gate's operating status in real time, including its opening, position, and cylinder stroke. Common sensors include opening meters (such as multi-turn absolute rotary encoders) and displacement sensors. These sensors convert the collected data into electrical signals and transmit them to the controller for processing.

[0031] The controller is the core component of the correction control module. It receives electrical signals from sensors and processes them according to pre-set algorithms and logic. When it detects that the difference in piston rod travel between the cylinders at either end of the gate exceeds a set value, the controller outputs a control signal to adjust the flow rate of the proportional valve (or throttle valve) to achieve correction control of the gate.

[0032] PLC control module responsible for receiving sensor signals, processing data, and issuing control instructions;

[0033] The PLC control module receives signals from sensors and controllers and performs logical analysis and data processing according to pre-set programs. Through the output module, the PLC controls the hydraulic gate hoist's motor, solenoid valve, and other actuators, enabling gate opening, closing, and correction. The PLC also transmits system operating status, fault information, and other data to the touchscreen display via a communication interface for display and alarms.

[0034] Touch screen display for configuring and setting device variables, signal source combinations, position sensors, and control parameters;

[0035] The touchscreen display is the human-machine interface for the automation control system. It receives data transmitted by the PLC and displays it graphically. Operators can use the touchscreen to monitor and operate the system, including viewing the real-time status of the gate, setting operating parameters, and starting or stopping equipment. The touchscreen also provides fault alarms and event logging, helping operators identify and address problems promptly.

[0036] The total length of the tide gate in this plan is 290 meters, the gate top is 5 meters high, the gate is 10 meters wide, and it consists of 23 hydraulic vertical lift flat steel gates.

[0037] The sensor and controller in the tide gate lifting and lowering correction control module are connected by cables, and the collected data are transmitted to the controller in real time for processing.

[0038] The controller is connected to the PLC control module via a communication interface and transmits processed data and control signals to the PLC control module.

[0039] The integrated hydraulic gate hoist and touchscreen display are both connected to a PLC control module. The PLC control module controls the hydraulic gate hoist's motor, solenoid valve, and other actuators through an output module, enabling gate opening, closing, and correction. The PLC control module is connected to the touchscreen display via a communication interface (such as a serial port or Ethernet), transmitting real-time data such as the system's operating status and fault information to the touchscreen display for display and alarms.

[0040] The tidal gate control system occasionally experiences module deviation in its stability module. The gate displacement sensor needs to be adjusted based on site conditions. Failure to do so can result in poor correction and improper opening and closing. Each parameter adjustment requires a PLC engineer to visit the site to adjust the program parameters.

[0041] The integrated hydraulic hoist includes a hydraulic pump, a motor, and a solenoid valve for controlling the opening and closing of the gate and the deviation correction control. The PLC control module is connected to the hydraulic pump, the motor, and the solenoid valve through an output module. The hydraulic pump, the motor, and the solenoid valve are all actuators of the hydraulic hoist.

[0042] The equipment variables of the integrated hydraulic gate hoist include: hydraulic oil temperature (integrated hydraulic gate hoist), hydraulic oil pressure (indicates the pressure value in the hydraulic system, which is an important parameter for controlling the opening and closing of the gate), cylinder stroke (describes the displacement of the cylinder piston rod, used to determine the opening of the gate), and motor current (reflects the working status of the motor, used to monitor the load and fault conditions of the motor);

[0043] The equipment variables of the tide gate lifting and lowering correction control module include the opening of the tide gate (the current opening of the gate is monitored in real time by the sensor, which is the basic data for controlling the opening and closing and correction of the gate), the stroke difference of the oil cylinders at both ends of the tide gate (used to determine whether the gate is deflected, which is the key parameter for correction control), and the correction control signal (used to adjust the flow of the proportional valve or throttle valve to achieve gate correction);

[0044] The device variables of the PLC control module include input signals (various signals from sensors and controllers, such as gate opening, cylinder stroke difference, hydraulic oil temperature, etc.), output signals (control signals calculated by the PLC according to program logic, used to control the actions of actuators such as motors and solenoid valves), and fault alarm signals (when a system fault occurs, the PLC will output a fault alarm signal, which will be displayed on the touch screen or trigger an alarm device).

[0045] It also includes variables on the touch screen: system operation variables (including real-time gate opening, hydraulic oil temperature, pressure and other system status information, used for display and monitoring), operation variables (parameters and instructions set by the operator through the touch screen, such as gate target opening, correction control parameters, etc.), and alarm information variables (when a system failure occurs, the touch screen displays the alarm information and fault code to guide the operator to troubleshoot and handle the fault).

[0046] The sensor is configured as an opening meter or a displacement sensor capable of monitoring the gate operation status in real time. The gate operation status includes the gate opening, position, and cylinder stroke.

[0047] The displacement sensor can monitor the gate's displacement in real time, ensuring it is always in the correct position during lift and lowering. This helps to promptly detect and correct any deviations in the gate's movement, thus avoiding potential malfunctions and safety hazards.

[0048] The displacement sensor can monitor the gate's displacement in real time, ensuring it is always in the correct position during lift and lowering. This helps to promptly detect and correct any deviations in the gate's movement, thus avoiding potential malfunctions and safety hazards.

[0049] Displacement sensors can also be used for fault diagnosis. If an abnormality occurs during gate operation, the displacement sensor captures these abnormal signals and transmits them to the PLC control module. Based on these signals, the PLC control module can perform fault diagnosis and early warning, enabling timely action to prevent further escalation of the problem.

[0050] The parameters of the displacement sensor include range, resolution, and zero point calibration. The displacement sensor is selected from any one of a grating sensor, a magnetostrictive displacement sensor, and a potentiometer displacement sensor.

[0051] There are 23 tide gate lifting and lowering correction control modules, and 2 PLC control modules. One of the PLC control modules controls 12 tide gate lifting and lowering correction control modules, and the other PLC control module controls 11 tide gate lifting and lowering correction control modules.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic deviation-correcting device controlled by PLC, characterized in that: include: Multiple integrated hydraulic hoists for driving the raising and lowering of tide gates; Tide gate lift and correction control modules that integrate multiple sensors and controllers and monitor gate position and status in real time; PLC control module responsible for receiving sensor signals, processing data, and issuing control instructions; Touch screen display for configuring and setting device variables, signal source combinations, position sensors, and control parameters; The sensor and controller in the tide gate lifting and lowering correction control module are connected by a cable, the controller is connected to the PLC control module through a communication interface, and the integrated hydraulic hoist and touch display are both connected to the PLC control module.

2. A PLC-controlled fully automatic deviation-correcting device according to claim 1, characterized in that: The integrated hydraulic gate hoist includes a hydraulic pump, an electric motor, and an electromagnetic valve for controlling the opening and closing of the gate and the deviation correction control. The PLC control module is connected to the hydraulic pump, the electric motor, and the electromagnetic valve through an output module.

3. The PLC-controlled fully automatic deviation-correcting device according to claim 1, characterized in that: The equipment variables of the integrated hydraulic hoist include: hydraulic oil temperature, hydraulic oil pressure, cylinder stroke, and motor current; The equipment variables of the tide gate lifting and lowering correction control module include the opening of the tide gate, the stroke difference of the oil cylinders at both ends of the tide gate, and the correction control signal; The device variables of the PLC control module include input signals, output signals, and fault alarm signals.

4. The PLC-controlled fully automatic deviation-correcting device according to claim 1, characterized in that: The sensor is configured as an opening meter or a displacement sensor capable of monitoring the gate operation status in real time. The gate operation status includes the gate opening, position, and cylinder stroke.

5. The PLC-controlled fully automatic deviation-correcting device according to claim 4, characterized in that: The parameters of the displacement sensor include range, resolution, and zero point calibration. The displacement sensor is selected from any one of a grating sensor, a magnetostrictive displacement sensor, and a potentiometer displacement sensor.

6. The PLC-controlled fully automatic deviation-correcting device according to claim 1, characterized in that: There are 23 tide gate lifting and lowering correction control modules, and 2 PLC control modules. One of the PLC control modules controls 12 tide gate lifting and lowering correction control modules, and the other PLC control module controls 11 tide gate lifting and lowering correction control modules.

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