A hydraulic control system for flat opening of a subway single-leaf flood gate

Abstract

The utility model belongs to the automation control technical field especially relates to a subway single leaf floodgate flat -open's hydraulic control system, including sensor module, control module and execution module, execution module is flat -open type floodgate hydraulic system, sensor module includes environment monitoring sensor unit, oil circuit monitoring sensor unit and execution monitoring sensor unit, is respectively used in gathering environment water level data, oil circuit pressure and flow data, oil cylinder or hydraulic motor position state data, control module includes PLC controller, man -machine interaction screen and alarm unit, and PLC controller is used for receiving sensor module data and exports control instruction to execution module, and man -machine interaction screen is used for showing system state, and alarm unit is used for triggering sound light warning in abnormal time. Through using the utility model, can realize the automation control of hydraulic system.

Description

Technical Field

[0001] This utility model belongs to the field of automation control technology, and in particular relates to a hydraulic control system for a single-leaf flood-proof door of a subway. Background Technology

[0002] As the lifeline of modern cities, the safe operation of urban subway systems is of paramount importance. Subway lines are mostly located underground, with some sections even passing beneath rivers, lakes, and seas, thus facing the potential risk of flooding. Flood doors, as the last physical barrier in subway tunnels against massive floods and to prevent the escalation of accidents, are crucial to the safety of the entire line and even the entire subway network.

[0003] Hinged floodgates are a common type of gate in subway systems, used to seal and open tunnels by rotating the gate panels. Currently, the operation and control of these large floodgates mainly rely on hydraulic systems to provide enormous thrust, enabling smooth movement of the floodgates.

[0004] However, existing hydraulic systems for swing-type floodgates rely on manual judgment and operation, resulting in low automation. These systems lack a comprehensive sensor network, making it impossible to monitor key parameters such as water level within the tunnel, hydraulic system pressure, temperature, and flow rate in real time. The opening and closing of the gates often depends on manual judgment and control, leading to slow response times. In emergency flood situations, this may cause the optimal closing time to be missed, and also poses a threat to the safety of operators. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic control system for a single-leaf floodproof door in a subway, which aims to solve the problem of low automation in existing hydraulic control systems for swing-type floodproof doors.

[0006] To achieve the above objectives, this utility model provides a hydraulic control system for a single-leaf flood-proof door swing-out mechanism in a subway system, comprising a sensor module, a control module, and an execution module, wherein: The execution module is a swing-type floodgate hydraulic system, which includes a main cylinder, a pin cylinder, a hydraulic motor, a return oil passage, a hydraulic oil tank, an electromagnetic reversing valve unit, an electro-hydraulic lock, a multi-pump unit, an electro-throttle valve, and an electromagnetic relief valve unit. The sensor module includes an environmental monitoring sensor unit, an oil circuit monitoring sensor unit, and an execution monitoring sensor unit, which are used to collect environmental water level data, oil circuit pressure and flow data, and position status data of oil cylinders or hydraulic motors, respectively. The control module includes a PLC controller, a human-machine interface screen, and an alarm unit. The PLC controller is used to receive data from the sensor module and output control commands to the execution module. The human-machine interface screen is used to display the system status. The alarm unit is used to trigger audible and visual alarms in case of abnormality. The electromagnetic reversing valve unit includes a first electromagnetic reversing valve disposed on the main oil cylinder, a second electromagnetic reversing valve disposed on the pin oil cylinder, and a third electromagnetic reversing valve disposed on the hydraulic motor. The electromagnetic relief valve unit includes a first electromagnetic relief valve disposed on the main oil cylinder, a second electromagnetic relief valve disposed on the pin oil cylinder, and a third electromagnetic relief valve disposed on the hydraulic motor.

[0007] As an optional solution of this utility model, the oil circuit monitoring sensor unit includes a pressure sensor group, a flow sensor, and an integrated liquid level and temperature sensor, wherein: The pressure sensor group includes a first pressure sensor disposed at the inlet of the rodless chamber of the main hydraulic cylinder and a second pressure sensor disposed in the rodless chamber of the pin cylinder; the first sensor detects the pressure in the rodless chamber of the main hydraulic cylinder; the second pressure sensor is used to detect the pressure in the rodless chamber of the pin cylinder. The flow sensor is installed in the oil inlet pipe of the main oil cylinder and is used to detect the oil inlet flow rate of the main oil cylinder.

[0008] As an optional embodiment of this invention, the execution monitoring sensor unit includes a displacement sensor group and a speed sensor, wherein: The displacement sensor group includes a first displacement sensor mounted on the piston rod of the main hydraulic cylinder and a second displacement sensor mounted on the piston rod of the pin hydraulic cylinder; the first displacement sensor is used to monitor the position state of the piston rod of the main hydraulic cylinder; the second displacement sensor is used to monitor the position state of the piston rod of the pin hydraulic cylinder. The speed sensor is installed on the output shaft of the hydraulic motor and is used to detect the speed of the hydraulic motor.

[0009] As an optional solution of this utility model, the integrated liquid level and temperature sensor is installed inside the hydraulic oil tank to detect the oil level and temperature in the hydraulic oil tank in real time; the integrated liquid level and temperature sensor is communicatively connected to the PLC controller to transmit the oil level and temperature to the PLC controller.

[0010] As an optional solution of this utility model, the pressure sensor group further includes a fourth pressure sensor disposed at the outlet of the multi-pump unit for detecting the output pressure of the multi-pump unit. The fourth pressure sensor is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the multi-pump unit to adjust the number of hydraulic pumps started by the multi-pump unit in real time according to the output pressure of the multi-pump unit.

[0011] As an optional embodiment of this invention, the pressure sensor group further includes a third pressure sensor disposed in the return oil pipeline, the third pressure sensor being used to monitor the return oil pressure.

[0012] As an optional solution of this utility model, the environmental monitoring sensor unit includes multiple liquid level sensors arranged at fixed height intervals in the subway tunnel for detecting environmental water level data.

[0013] As an optional solution of this utility model, the electro-hydraulic lock is connected in parallel to the oil circuit of the pin cylinder for preventing accidental locking after the pin is unlocked.

[0014] The above-mentioned technical solutions in the hydraulic control system for a single-leaf floodproof door of a subway provided in this embodiment of the utility model have at least one of the following technical effects: 1. By setting up multi-dimensional sensor modules covering the environment, oil circuit and actuator modules, the status of the hydraulic system can be accurately and comprehensively monitored, and anomalies can be identified and warnings issued in real time.

[0015] 2. Through multi-dimensional sensor data feedback, the PLC controller adjusts the number of hydraulic pumps started by the multi-pump unit based on the output pressure of the multi-pump unit and the ambient water level data; the PLC controller adjusts the opening of the electronic throttle valve and the electromagnetic relief valve unit based on the oil inlet flow data of the main oil cylinder and the speed data of the hydraulic motor, and has a strong adaptive adjustment capability.

[0016] 3. By constructing a process control system for the opening of a single floodproof door in the subway, no manual intervention is required. The PLC is automatically triggered when the environmental water level data reaches a safe range, completing the entire process of opening and closing the single floodproof door, reducing response time and significantly improving flood control efficiency in emergency scenarios. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the hydraulic control system for a single-leaf flood-proof door of a subway, according to the present invention.

[0019] Figure 2 This is a schematic diagram of the sensor module of the hydraulic control system for a single-leaf flood-proof door of a subway, according to this utility model. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0021] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] In specific embodiments of this utility model, such as Figure 1 As shown, a hydraulic control system for a single-leaf flood-proof door in a subway is provided, including a sensor module, a control module, and an execution module, wherein: The execution module is a swing-type floodgate hydraulic system. Since the swing-type floodgate hydraulic system is existing technology, this utility model will not describe the swing-type floodgate hydraulic system in detail. Only the structure related to the control system and sensor arrangement of this utility model will be selected for description. The swing-type floodgate hydraulic system includes a main cylinder, a pin cylinder, a hydraulic motor, a return oil passage, a hydraulic oil tank, an electromagnetic reversing valve unit, an electro-hydraulic lock, a multi-pump unit, an electro-throttle valve, and an electromagnetic relief valve unit. The sensor module includes an environmental monitoring sensor unit, an oil circuit monitoring sensor unit, and an execution monitoring sensor unit, which are used to collect environmental water level data, oil circuit pressure and flow data, and position status data of oil cylinders or hydraulic motors, respectively. The control module includes a PLC controller, a human-machine interface screen, and an alarm unit. The PLC controller is used to receive data from the sensor module and output control commands to the execution module. The human-machine interface screen is used to display the system status, and the alarm unit is used to trigger audible and visual alarms in case of abnormality. The electromagnetic directional valve unit includes a first electromagnetic directional valve installed in the main cylinder, a second electromagnetic directional valve installed in the pin cylinder, and a third electromagnetic directional valve installed on the hydraulic motor. The electromagnetic relief valve unit includes a first electromagnetic relief valve installed in the main oil cylinder, a second electromagnetic relief valve installed in the pin oil cylinder, and a third electromagnetic relief valve installed on the hydraulic motor.

[0025] Preferably, the oil circuit monitoring sensor unit includes a pressure sensor group, a flow sensor, and an integrated liquid level and temperature sensor, wherein: The pressure sensor group includes a first pressure sensor located at the inlet of the rodless chamber of the main hydraulic cylinder and a second pressure sensor located in the rodless chamber of the latch cylinder. The first sensor detects the pressure in the rodless chamber of the main hydraulic cylinder and monitors the driving force for the horizontal rotation of the floodproof door. The PLC controller receives the pressure in the rodless chamber of the main hydraulic cylinder and adjusts the first electromagnetic relief valve according to the pressure in the rodless chamber of the main hydraulic cylinder to ensure that the pressure in the rodless chamber of the main hydraulic cylinder meets the water pressure resistance requirements. The second pressure sensor is used to detect the pressure in the rodless chamber of the latch cylinder and monitor the locking pressure. The PLC controller receives the pressure in the rodless chamber of the latch cylinder and adjusts the first electromagnetic relief valve according to the pressure in the rodless chamber of the latch cylinder (mainly to automatically replenish pressure when the pressure is insufficient) to ensure that the latch is fully extended and pressed.

[0026] A flow sensor is installed in the oil inlet pipe of the main oil cylinder to detect the oil flow rate of the main oil cylinder. The PLC controller receives the oil flow rate of the main oil cylinder and calculates the horizontal rotation speed of the floodgate based on the oil flow rate of the main oil cylinder. It then adjusts the opening of the electronically controlled throttle valve to regulate the horizontal rotation speed of the floodgate and avoid impact when the floodgate body starts and stops.

[0027] Preferably, the monitoring sensor unit includes a displacement sensor group and a speed sensor, wherein: The displacement sensor group includes a first displacement sensor mounted on the piston rod of the main hydraulic cylinder and a second displacement sensor mounted on the piston rod of the latch cylinder. The first displacement sensor is used to monitor the position of the piston rod of the main hydraulic cylinder, monitor the extension or retraction length of the piston rod, and convert it into the horizontal rotation angle of the floodgate to accurately determine the "fully open", "half closed", and "fully closed" states of the floodgate. The second displacement sensor is used to monitor the position of the piston rod of the latch cylinder, monitor the extension or retraction position of the piston rod to confirm whether the latch is "unlocked" (the latch is fully retracted) or "locked" (the latch is fully extended).

[0028] The speed sensor is installed on the output shaft of the hydraulic motor. Since it detects the speed of the hydraulic motor, the speed of the hydraulic motor can be converted into the horizontal rotation speed. It can be verified with the horizontal rotation speed of the floodgate obtained by measuring the oil flow rate of the main oil cylinder. When the horizontal rotation speed of the floodgate is abnormal, the PLC controller adjusts the third electromagnetic overflow valve to ensure the stability of the gate's movement speed.

[0029] Preferably, the integrated level and temperature sensor is installed inside the hydraulic oil tank to monitor the oil level and temperature in real time. The sensor communicates with the PLC controller to transmit the oil level and temperature information. When the oil level is too low, the PLC controller automatically triggers an alarm and suspends non-emergency operations to prevent the multi-pump unit from running dry. When the oil temperature is too high, the PLC controller automatically starts the tank cooling fan.

[0030] Preferably, the pressure sensor group also includes a fourth pressure sensor located at the outlet of the multi-pump unit, used to detect the output pressure of the multi-pump unit. The fourth pressure sensor is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the multi-pump unit. The PLC controller adjusts the number of hydraulic pumps started by the multi-pump unit in real time according to the output pressure of the multi-pump unit to prevent power waste of the multi-pump unit and reduce damage to the pipeline caused by overpressure.

[0031] Preferably, the pressure sensor group also includes a third pressure sensor installed in the return oil line. The third pressure sensor is used to monitor the return oil pressure and determine whether the return oil line is blocked. If the return oil line pressure exceeds the threshold, the PLC controller automatically controls the opening of the backup return oil valve.

[0032] Preferably, the environmental monitoring sensor unit includes multiple liquid level sensors installed at fixed height intervals in the subway tunnel for detecting environmental water level data. In a preferred embodiment of this invention, the fixed height interval is 50mm, and a total of four liquid level sensors are used. The range of 0-50mm is divided into a completely safe range, 50-100mm into a warning safe range, 100-150mm into a warning danger range, and 150mm-200mm into a danger range. When the environmental water level is within the completely safe range, the PLC system does not trigger any operation. When the environmental water level is within the warning safe range, the PLC system triggers a status self-check to respond to flooding. When the environmental water level is within the warning danger range, the PLC system triggers the process of closing the floodgates. When the environmental water level is within the danger range, the PLC system skips the status self-check and directly triggers the process of closing the floodgates, and also triggers an audible and visual alarm.

[0033] Preferably, the electro-hydraulic lock is connected in parallel to the oil circuit of the pin cylinder to prevent accidental locking after the pin is unlocked.

[0034] The data flow control process of this utility model in the working state is as follows: 1. The PLC controller performs a status self-test, collecting and receiving the piston rod position status of the main hydraulic cylinder, the piston rod position status of the pin hydraulic cylinder, the output pressure status of the multi-pump unit, the oil level and temperature status in the hydraulic oil tank, and the status of the manual pump. If all the above status parameters are within the normal range, the self-test passes. If any of the above status parameters are abnormal, the PLC controller sends an alarm signal to the alarm unit and sends abnormal status information to the human-machine interface screen. The alarm unit issues an audible and visual warning, and the human-machine interface screen displays the abnormal status information.

[0035] 2. The PLC controller collects and receives ambient water level data. If the ambient water level is higher than the preset range, the subsequent actions of process 3 will proceed; if the ambient water level is lower than the preset range, the subsequent actions of process 3 will not proceed.

[0036] 3. The PLC controller sends an action control electrical signal to the second solenoid directional valve. The second solenoid directional valve controls the oil supply to the rod chamber of the pin cylinder and the oil return to the rodless chamber of the pin cylinder, causing the pin of the pin cylinder to retract. During the pin retraction process, the PLC controller collects and receives the position status data of the piston rod of the pin cylinder in real time. When the position status data of the piston rod of the pin cylinder indicates that the pin has been fully retracted, the PLC controller outputs a control signal to control the second solenoid directional valve to stop the pin cylinder from moving. At the same time, the PLC controller outputs a control signal to open the electro-hydraulic lock to prevent the pin from extending accidentally.

[0037] 4. The PLC controller starts the corresponding number of hydraulic pumps in the multi-pump unit based on the environmental water level data. Simultaneously, it sends an action control signal to the first solenoid directional valve. Hydraulic oil enters the rodless chamber of the main cylinder through the electronically controlled throttle valve, pushing the piston rod of the main cylinder to extend and causing the floodgate to rotate and close. During the rotation and closing process, the PLC controller collects and receives real-time data on the oil flow rate of the main cylinder and the speed of the hydraulic motor. If the oil flow rate and speed of the main cylinder are higher than the preset safety range, the PLC controller controls the electronically controlled throttle valve to reduce its opening; if they are lower than the preset safety range, the PLC controller controls the electronically controlled throttle valve to increase its opening. During the rotation and closing process, the PLC controller collects and receives real-time data on the piston rod position of the main cylinder. If the piston rod position is greater than the preset range (indicating that the floodgate is about to rotate to the door frame position), the PLC controller controls the multi-pump unit to reduce the number of hydraulic pumps activated.

[0038] 5. When the piston rod position data of the main cylinder indicates that the piston rod is fully extended, the PLC controller outputs a control signal to disconnect the power supply to the first solenoid directional valve, stopping the main cylinder's movement. Simultaneously, the PLC controller outputs a control signal to close the electro-hydraulic lock. The PLC controller outputs a control signal to the second solenoid directional valve, which controls the hydraulic oil to enter the rodless chamber of the pin cylinder, pushing the pin out. The PLC controller collects and receives the pressure data of the rodless chamber of the pin cylinder. When the pressure data of the rodless chamber of the pin cylinder reaches the set value, it indicates that the pin is locked in place. The PLC controller outputs a control signal to control the second solenoid directional valve to stop the pin's movement.

[0039] 6. The PLC controller outputs a control signal to control the third electromagnetic reversing valve to fine-tune the speed of the hydraulic motor, causing the floodgate to slightly press against the door frame. Simultaneously, the PLC controller collects and receives all sensor data from the sensor modules. After ensuring all sensor data is within a safe range, the PLC controller sends a signal command to the human-machine interface (HMI) indicating that the floodgate is closed. The HMI displays a green normal indicator light, and the system enters the hydraulic control system.

[0040] 7. When the PLC controller detects that the ambient water level has fallen below the preset safety range, it automatically executes the "open-unlock" process to restore the floodproof door to its normal state.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic control system for a single-leaf flood-proof door in a subway, characterized in that, It includes a sensor module, a control module, and an execution module, wherein: The execution module is a swing-type floodgate hydraulic system, which includes a main cylinder, a pin cylinder, a hydraulic motor, a return oil passage, a hydraulic oil tank, an electromagnetic reversing valve unit, an electro-hydraulic lock, a multi-pump unit, an electro-throttle valve, and an electromagnetic relief valve unit. The sensor module includes an environmental monitoring sensor unit, an oil circuit monitoring sensor unit, and an execution monitoring sensor unit, which are used to collect environmental water level data, oil circuit pressure and flow data, and position status data of oil cylinders or hydraulic motors, respectively. The control module includes a PLC controller, a human-machine interface screen, and an alarm unit. The PLC controller is used to receive data from the sensor module and output control commands to the execution module. The human-machine interface screen is used to display the system status. The alarm unit is used to trigger audible and visual alarms in case of abnormality. The electromagnetic reversing valve unit includes a first electromagnetic reversing valve disposed on the main oil cylinder, a second electromagnetic reversing valve disposed on the pin oil cylinder, and a third electromagnetic reversing valve disposed on the hydraulic motor. The electromagnetic relief valve unit includes a first electromagnetic relief valve disposed on the main oil cylinder, a second electromagnetic relief valve disposed on the pin oil cylinder, and a third electromagnetic relief valve disposed on the hydraulic motor.

2. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 1, is characterized in that... The oil circuit monitoring sensor unit includes a pressure sensor group, a flow sensor, and an integrated liquid level and temperature sensor, wherein: The pressure sensor group includes a first pressure sensor disposed at the inlet of the rodless chamber of the main hydraulic cylinder and a second pressure sensor disposed in the rodless chamber of the pin cylinder; the first pressure sensor detects the pressure in the rodless chamber of the main hydraulic cylinder; the second pressure sensor is used to detect the pressure in the rodless chamber of the pin cylinder. The flow sensor is installed in the oil inlet pipe of the main oil cylinder and is used to detect the oil inlet flow rate of the main oil cylinder.

3. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 1, is characterized in that... The execution monitoring sensor unit includes a displacement sensor group and a speed sensor, wherein: The displacement sensor group includes a first displacement sensor mounted on the piston rod of the main hydraulic cylinder and a second displacement sensor mounted on the piston rod of the pin hydraulic cylinder; the first displacement sensor is used to monitor the position of the piston rod of the main hydraulic cylinder; the second displacement sensor is used to monitor the position of the piston rod of the pin hydraulic cylinder. The speed sensor is installed on the output shaft of the hydraulic motor and is used to detect the speed of the hydraulic motor.

4. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 2, is characterized in that... The integrated liquid level and temperature sensor is installed inside the hydraulic oil tank to detect the oil level and temperature in the hydraulic oil tank in real time. The integrated liquid level and temperature sensor is communicatively connected to the PLC controller to transmit the oil level and temperature to the PLC controller.

5. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 2, is characterized in that... The pressure sensor group also includes a fourth pressure sensor located at the outlet of the multi-pump unit for detecting the output pressure of the multi-pump unit. The fourth pressure sensor is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the multi-pump unit. The PLC controller adjusts the number of hydraulic pumps started by the multi-pump unit in real time according to the output pressure of the multi-pump unit.

6. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 2, is characterized in that... The pressure sensor group also includes a third pressure sensor disposed in the oil return passage, which is used to monitor the oil return pressure.

7. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 1, is characterized in that... The environmental monitoring sensor unit includes multiple liquid level sensors installed at fixed height intervals in the subway tunnel for detecting environmental water level data.

8. The hydraulic control system for a single-leaf flood-proof door of a subway, as described in claim 1, is characterized in that... The electro-hydraulic lock is connected in parallel to the oil circuit of the pin cylinder and is used to prevent accidental locking after the pin is unlocked.

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