A hydraulically driven intelligent capping DCAC electronic control system and control method for a mixed-rail vehicle

Abstract

This invention discloses a DC / AC electronic control system and method for a hydraulically driven intelligent cover application system for molten iron cars. The electronic control system is simple and reasonable in design, adopting a DC / AC module and enabling remote or local operation via PLC, wireless AP, frequency converter, etc. It drives the on-board hydraulic actuator to automatically complete the lifting and lowering of the insulation cover of the molten iron car, and complete the work processes such as receiving or pouring molten iron, avoiding the operation of personnel in high-risk environments. At the same time, the electrical control system adopts VVVF-PLC control mode, driving the hydraulic station oil pump motor to provide hydraulic pressure (the pressure is provided by the accumulator before the pressure reaches the rated value). The corresponding solenoid valves of each oil cylinder control the hydraulic actuator to complete the corresponding action requirements. The built-in magnetic ring displacement sensors in each hydraulic actuator control the stroke and feedback, so that the electronic control system can complete the operation quickly, efficiently and accurately.

Description

Technical Field

[0001] This invention belongs to the field of electric control technology for mixed-rail vehicles, and relates to a DCAC electric control system and control method for a hydraulically driven intelligent cover-adding system for mixed-rail vehicles. Background Technology

[0002] As an indispensable equipment for transporting and storing molten iron in modern metallurgical industry, the molten iron mixing car plays an important role in metallurgical enterprises. The molten iron mixing car consists of a tank that is movable between the main and driven ends for storing and transporting molten iron. The tank opening is located at the center of the top of the tank. In order to avoid air pollution caused by the smoke and dust emitted by the molten iron in the tank, and to prevent the temperature of the molten iron from falling too quickly due to the open tank opening, the molten iron mixing car is usually equipped with an insulation cover.

[0003] Currently, the existing insulated capping devices at the mouths of mixed iron ore cars in China are mostly controlled by onboard control cabinet buttons or handheld remote controls, which drive related mechanisms to complete on-site capping and uncapping operations such as iron receiving and can tipping. Handheld remote transmitters are complex in structure and cumbersome to operate, making it impossible to remotely control multiple cars simultaneously. Furthermore, in actual capping operations, at least two operators are required at each iron outlet to perform on-site operations, monitoring, and coordination. The on-site environment for iron receiving and can tipping poses significant safety hazards to operators. In addition, the onboard power packs are mostly configured to directly drive DC load systems with battery packs or drive AC loads with inverters. This results in rapid battery consumption and excessively long system cycle times, failing to meet the timeliness and instantaneous operation requirements of iron receiving and can tipping. Summary of the Invention

[0004] To address the technical deficiencies in the background art, this invention provides a hydraulically driven intelligent cover-adding DCAC electronic control system and control method for mixed-rail vehicles. The technical solution to the problem is as follows:

[0005] This invention discloses a hydraulically driven intelligent lid-adding DCAC electronic control system for a mixed-rail vehicle. The mixed-rail vehicle includes an active end, a driven end, and a tank body with a can opening located between the two. A can lid is movably disposed at the can opening. The active end includes a housing, inside which is a hydraulic station. A hydraulic actuator with its front end fixed to the can lid is movably disposed at the top. The electronic control system includes an electronic control cabinet and a battery pack, frequency converter, PLC, and feedback unit disposed inside the cabinet. The hydraulic station is sequentially connected to an oil pump, a solenoid valve platform, and an accumulator via pipelines. The solenoid valve platform is connected to the hydraulic actuator via pipelines. The hydraulic actuator and the accumulator... The device is equipped with a detection device; the output terminals of the battery pack are respectively connected to a DC / AC module and a control power supply, the output terminal of the DC / AC module is connected to the input terminal of the frequency converter, and the output terminal of the frequency converter is connected to the oil pump; the input terminal of the PLC is connected to an operation unit and a feedback unit, and its output terminals are respectively connected to a drive circuit and a protection circuit, the drive circuit is respectively connected to the frequency converter, the solenoid valve platform, and the protection circuit; the battery pack, DC / AC module, detection device, and protection circuit are respectively connected to the feedback unit; the output terminal of the control power supply is respectively connected to the PLC, the drive circuit, the protection circuit, the detection device, and the feedback unit.

[0006] Furthermore, the electronic control system also includes a ground power supply unit installed on the ground and an external power supply unit installed on the hybrid vehicle, the external power supply unit including a charger connected to the battery pack.

[0007] Furthermore, the ground power supply unit includes a power plug with AC power, and the external power unit includes an emergency charging socket and a charging indicator light connected to the charger.

[0008] Furthermore, the ground power supply unit includes an external power connection device installed on the ground, and the external power connection unit includes a power connection port that is adapted to the external power connection device and connected to the charger.

[0009] Furthermore, the hydraulic actuator includes a telescopic guide seat movably mounted on the top of the housing. A telescopic hydraulic cylinder is provided on the outer side of the telescopic guide seat, and a telescopic rod is movably mounted on the inner side. A lifting and lowering hydraulic cylinder is movably mounted between the bottom and the housing. The telescopic rod is connected to the hydraulic rod end of the telescopic hydraulic cylinder. A fixed seat is provided on the top of the housing. A rotating lug seat and a mounting seat are respectively installed at the front and rear ends of the fixed seat. A rotating shaft is provided inside the rotating lug seat. A bent arm is movably mounted on the mounting seat. One end of the bent arm is movably connected to the hydraulic rod of the lifting and lowering hydraulic cylinder, and the other end is movably connected to the bottom of the telescopic guide seat through a connecting seat. A rotating lug is provided at the bottom front side of the telescopic guide seat, and the rotating lug is rotatably connected to the rotating shaft.

[0010] Furthermore, the solenoid valve platform includes an overflow valve connected to an oil pump via a pipeline. The overflow valve is connected to a cover-raising solenoid valve, a cover-lowering solenoid valve, an arm-extending solenoid valve, an arm-retracting solenoid valve, and an accumulator solenoid valve via pipelines. The cover-raising and cover-lowering solenoid valves are connected to the cover-raising and lowering hydraulic cylinders via pipelines. The arm-extending and arm-retracting solenoid valves are connected to the telescopic hydraulic cylinders via pipelines. The accumulator solenoid valve is connected to the accumulator via a pipeline. The detection device includes an X-axis displacement sensor and a Y-axis displacement sensor respectively installed inside the cover-raising and lowering hydraulic cylinder and the telescopic hydraulic cylinder, as well as an overflow valve pressure sensor installed on the accumulator. The X-axis displacement sensor, the Y-axis displacement sensor, and the overflow valve pressure sensor are connected to a feedback unit via lines.

[0011] Furthermore, both the X-axis displacement sensor and the Y-axis displacement sensor are built-in magnetic ring type displacement sensors.

[0012] Furthermore, the electrical control system also includes a DC / AC working relay and a frequency converter starting relay. The drive circuit includes coils for the DC / AC working relay, the frequency converter starting relay, the cover lifting solenoid valve, the cover lowering solenoid valve, the arm extending solenoid valve, the arm retracting solenoid valve, the overflow valve, and the accumulator solenoid valve, which are respectively connected to the PLC output terminal. The protection circuit includes a normally open contact of the DC / AC working relay connected between the PLC output terminal and the DC / AC module input terminal, and a normally open contact of the frequency converter starting relay connected to the frequency converter input terminal.

[0013] Furthermore, the operation unit is one or more of a remote operation unit, a local operation unit, and a touch screen operation unit;

[0014] The remote operation unit includes a wireless AP connected to the PLC and a ground control unit wirelessly connected to the wireless AP.

[0015] The local operation unit includes an onboard operation box located at the edge of the active end. The mechanical operation box is equipped with a one-button lift-up button, a one-button lower-up button, and an emergency stop button with built-in indicator lights. The two ends of the one-button lift-up button, the one-button lower-up button, and the emergency stop button are respectively connected to the output end of the control power supply and the input end of the PLC.

[0016] The touch screen operation unit includes a touch screen HMI connected to the input terminal of the PLC, and the touch screen HMI is connected to the output terminal of the control power supply.

[0017] Furthermore, the ground power supply unit and the external power supply unit, the electrical control cabinet and the airborne operation box and detection device, and the detection device and the hydraulic actuator and hydraulic station are all connected by a module coupling device.

[0018] This invention provides a control method for a hydraulically driven intelligent cover-adding DCAC electronic control system for mixed-rail vehicles, based on the above-described technical solution, comprising:

[0019] Control preparation: The battery pack supplies power to the DC / AC module. The DC / AC module performs a self-test and transmits the self-test result to the PLC via the feedback unit. If the DC / AC module self-test is successful, the PLC outputs a signal to the drive circuit. The coil of the DC / AC working relay in the drive circuit is energized and closes. The normally open contact of the DC / AC working relay in the protection circuit closes, so that the DC / AC module outputs AC power to supply the inverter. If the DC / AC module self-test fails, an alarm message is issued through the PLC.

[0020] "One-button lid lifting" control: The operation unit inputs a "one-button lid lifting" start signal to the PLC and executes the action program. The PLC outputs a signal to the drive circuit, energizing the inverter start relay coil and closing its normally open contact. The inverter starts working, outputting AC power of the set frequency to the oil pump motor in the hydraulic station. The oil pump motor starts running under no-load. The PLC executes a delay action program, outputting a signal to the drive circuit after N seconds. The overflow valve coil in the drive circuit is energized, and the hydraulic system begins to load. The oil pump motor runs at full load, delivering pressure. Simultaneously, the PLC executes the action program and outputs a signal to the drive circuit, energizing the accumulator solenoid valve coil and the lid lifting solenoid valve coil. The rated pressure stored in the accumulator begins to be released, acting on the lifting hydraulic cylinder in the hydraulic actuator to complete the lid lifting action. The Y-axis displacement sensor in the detection device simultaneously sends a signal to the feedback unit, which sends a dynamic position signal to the PLC. When the lid lifting position setting value is reached, the lid lifting solenoid valve coil is de-energized, and the hydraulic actuator stops. Lifting the lid: The PLC executes the action program, energizing the arm retraction solenoid valve coil in the drive circuit, which acts on the telescopic hydraulic cylinder in the hydraulic actuator to complete the arm retraction action. The X-axis displacement sensor in the detection device simultaneously sends a signal to the feedback unit, which sends a dynamic position signal to the PLC. When the arm retraction position setting value is reached, the arm retraction solenoid valve coil is de-energized, and the hydraulic actuator stops the arm retraction action. The PLC executes the program, and the overflow valve coil and accumulator solenoid valve coil in the drive circuit continue to be energized to supplement the pressure of the accumulator. The pressure sensor in the detection device simultaneously sends a signal to the feedback unit, which sends a dynamic pressure signal to the PLC. When the accumulator pressure reaches the rated value, the PLC executes the program, de-energizing the overflow valve coil and accumulator solenoid valve coil in the drive circuit, de-energizing the DC / AC working relay and the inverter starting solenoid valve coil, opening the normally open contacts of the DC / AC working relay and the inverter starting solenoid valve in the drive circuit, stopping the inverter and the DC / AC module, stopping the oil pump motor in the hydraulic station, and ending the one-button lifting lid action.

[0021] "One-button lid closing" control: The operation unit inputs a "one-button lid closing" start signal to the PLC and executes the action program. The PLC outputs a signal to the drive circuit, energizing the inverter start relay coil and closing its normally open contact. The inverter starts working, outputting AC power of the set frequency to the oil pump motor in the hydraulic station. The oil pump motor starts running under no-load. The PLC executes a delay action program, outputting a signal to the drive circuit after N seconds. The overflow valve coil in the drive circuit is energized, and the hydraulic system begins to load. The oil pump motor runs at full load, delivering pressure. Simultaneously, the PLC executes the action program and outputs a signal to the drive circuit, energizing the accumulator solenoid valve coil and the extension arm solenoid valve coil. The rated pressure stored in the accumulator begins to be released, acting on the telescopic hydraulic cylinder in the hydraulic actuator to complete the extension arm action. The X-axis displacement sensor in the detection device simultaneously sends a signal to the feedback unit, which sends a dynamic position signal to the PLC. When the extension arm reaches the set value, the extension arm solenoid valve coil is de-energized, and the hydraulic actuator stops extending. Arm movement; the PLC executes the action program, the cover-dropping solenoid valve coil in the drive circuit is energized, acting on the lifting and lowering hydraulic cylinder in the hydraulic actuator to complete the cover-dropping action. The Y-axis displacement sensor in the detection device synchronously sends a signal to the feedback unit, which sends a dynamic position signal to the PLC. When the cover-dropping position setting value is reached, the cover-dropping solenoid valve coil is de-energized, and the hydraulic actuator stops the cover-dropping action. The PLC executes the program, the overflow valve coil and the accumulator solenoid valve coil in the drive circuit continue to be energized, supplementing the pressure of the accumulator. The pressure sensor in the detection device synchronously sends a signal to the feedback unit, which sends a dynamic pressure signal to the PLC. When the accumulator pressure reaches the rated value, the PLC executes the program, the overflow valve coil and the accumulator solenoid valve coil in the drive circuit are de-energized, the DC / AC working relay and the inverter starting relay coil are de-energized, the normally open contacts of the DC / AC working relay and the inverter starting relay in the drive circuit are opened, the inverter and the DC / AC module stop working, the oil pump motor in the hydraulic station stops, and the one-button cover-dropping action ends.

[0022] "Lift" jog control: The "lift" start signal is sent to the PLC through the operation unit. The PLC executes the action program and outputs a signal to the drive circuit. The accumulator solenoid valve coil and the cover lifting solenoid valve coil in the drive circuit are energized. The rated pressure stored in the accumulator begins to be released, which acts on the lifting and lowering hydraulic cylinder in the hydraulic actuator to complete the cover lifting action. After the operation unit sends the stop "lift" signal to the PLC or the cover lifting position setting value of the Y-axis displacement sensor is reached, the cover lifting solenoid valve coil and the accumulator solenoid valve coil are de-energized, and the hydraulic actuator stops the cover lifting action.

[0023] "Retraction" inching control: The "retraction" start signal is sent to the PLC through the operation unit. The PLC executes the action program and outputs a signal to the drive circuit. The accumulator solenoid valve coil and the arm retraction solenoid valve coil in the drive circuit are energized. The rated pressure stored in the accumulator begins to be released, which acts on the telescopic hydraulic cylinder in the hydraulic actuator to complete the arm retraction action. After the operation unit sends the stop "retraction" signal to the PLC or the X-axis displacement sensor reaches the retraction position setting value, the arm retraction solenoid valve coil and the accumulator solenoid valve coil are de-energized, and the hydraulic actuator stops the arm retraction action.

[0024] "Extend" inching control: The "extend" start signal is sent to the PLC through the operation unit. The PLC executes the action program and outputs a signal to the drive circuit. The accumulator solenoid valve coil and the extension arm solenoid valve coil in the drive circuit are energized. The rated pressure stored in the accumulator begins to be released, which acts on the telescopic hydraulic cylinder in the hydraulic actuator to complete the extension arm action. After the operation unit sends the stop "extend" signal to the PLC or the extension arm position setting value of the X-axis displacement sensor is reached, the extension arm solenoid valve coil and the accumulator solenoid valve coil are de-energized, and the hydraulic actuator stops the extension arm action.

[0025] "Drop" inching control: The operation unit sends the "drop" start signal to the PLC. The PLC executes the action program and outputs a signal to the drive circuit. The accumulator solenoid valve coil and the cover-dropping solenoid valve coil in the drive circuit are energized. The rated pressure stored in the accumulator begins to be released, which acts on the lifting and lowering hydraulic cylinder in the hydraulic actuator to complete the cover-dropping action. After the operation unit sends the stop "drop" signal to the PLC or the cover-dropping position setting value of the Y-axis displacement sensor is reached, the cover-dropping solenoid valve coil and the accumulator solenoid valve coil are de-energized, and the hydraulic actuator stops the cover-dropping action.

[0026] During operation of the "lift," "retract," "extend," and "lower" jog controls, the pressure sensor in the hydraulic station's detection device synchronously sends signals to the feedback unit. The feedback unit then sends the dynamic pressure signal to the PLC. When the accumulator pressure falls below the set value, the PLC executes the accumulator pressure replenishment program. The PLC outputs a signal to the drive circuit, energizing the DC / AC working relay coil and closing the normally open contact of the DC / AC working relay in the protection circuit. The DC / AC module outputs AC power to the inverter, powering it on. Simultaneously, the inverter's starting relay coil in the drive circuit is energized, closing its normally open contact and starting the inverter. The inverter outputs AC power of the set frequency to the oil pump in the hydraulic station. The motors of the oil pump and the hydraulic pump start running under no-load. The PLC executes a delayed action program, and after N seconds, it outputs a signal to the drive circuit. The overflow valve coil and the accumulator solenoid valve coil in the drive circuit are energized, and the hydraulic system begins to load. The oil pump motor runs at full load, delivering pressure to the accumulator. The pressure sensor in the hydraulic station detection device synchronously sends the signal to the feedback unit, which sends the dynamic pressure signal to the PLC. When the accumulator pressure reaches the rated value, the PLC executes the program, and the overflow valve coil and the accumulator solenoid valve coil in the drive circuit are de-energized. The coils of the DC / AC working relay and the inverter starting relay are also de-energized. The normally open contacts of the DC / AC working relay and the inverter starting relay in the drive circuit open, and the inverter and DC / AC module stop working. The oil pump motor in the hydraulic station stops, and the accumulator pressure replenishment ends.

[0027] "Emergency Stop" Control: An "emergency stop" start signal is input to the PLC through the operation unit. The PLC executes the program and outputs a signal that de-energizes the coils of the DC / AC working relay and the inverter start relay. The normally open contacts of the DC / AC working relay and the inverter start relay in the drive circuit are opened, and the system stops working.

[0028] Compared with existing technologies, the present invention provides a hydraulically driven intelligent cover-adding DC / AC electrical control system for molten iron cars. Its design is simple and reasonable. Utilizing a DC / AC module, it achieves remote or local operation via PLC, wireless AP, and frequency converter. This drives the onboard hydraulic actuator to automatically lift and lower the insulation cover of the molten iron car, completing the processes of receiving or pouring molten iron, thus avoiding the need for personnel to work in high-risk environments. Simultaneously, the electrical control system employs VVVF-PLC control, driving the hydraulic station pump motor to provide hydraulic pressure (before the pressure reaches the rated value, it is provided by an accumulator). Corresponding solenoid valves in each cylinder control the hydraulic actuator to complete the required actions. Built-in magnetic ring displacement sensors in the hydraulic actuator control the stroke and feedback, enabling the electrical control system to complete operations quickly, efficiently, and accurately. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the control process of the electronic control system described in this invention;

[0030] Figure 2 This is a schematic diagram of the main interface of the touch screen HMI in this invention;

[0031] Figure 3 This is a schematic diagram of the touchscreen HMI maintenance interface in this invention;

[0032] Figure 4 This is a schematic diagram of the airborne control box panel in this invention;

[0033] Figure 5 This is a schematic diagram of the DC / AC system control principle in this invention;

[0034] Figure 6 This is a schematic diagram of the present invention installed on a mixed-rail vehicle;

[0035] Figure 7 This is an enlarged schematic diagram of the hydraulic actuator in this invention;

[0036] Figure 8 This is a modular schematic diagram of the electronic control system of the present invention;

[0037] In the diagram: 1. Ground power supply unit; 2. External power supply unit; 3. Battery pack; 4. DC / AC module; 5. Control power supply; 6. Wireless AP; 7. Inverter; 8. Hydraulic station; 81. Oil pump; 82. Solenoid valve console; 9. Hydraulic actuator; 10. Detection device; 11. PLC; 12. Drive circuit; KA1. DC / AC working relay; KA2. Inverter start relay; Y1. Lid lifting solenoid valve; Y2. Lid lowering solenoid valve; Y3. Arm extension solenoid valve; Y4. Arm retraction solenoid valve; Y5. Relief valve; Y6. Accumulator solenoid valve; 13. Protection circuit; 14. Touch screen HMI; 15. Local operation unit; 16. Feedback unit; 17. Accumulator; 18. Emergency stop button; 19. One-button lid lift button; 20. One-button lid lower button; 21. Charging indicator light; 22. Emergency charging socket; 23. Electrical control cabinet; 24. Onboard control box; 25. X-axis displacement sensor; 26. Y-axis displacement sensor; 27. Telescopic hydraulic cylinder; 28. Lifting and lowering hydraulic cylinder; 29. ​​Module coupling device; 30. Telescopic guide seat; 31. Telescopic rod; 32. Tank lid; 33. Tank body; 34. Driving end; 35. Driven end; 36. Tank opening; 37. Shell; 38. Pressure sensor; 39. Ground control unit; 40. Fixed seat; 41. Rotary lug; 42. Rotary lug seat; 43. Rotary shaft; 44. Bent arm; 45. Connecting seat; 46. Mounting seat. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the present patent application specification and claims are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in this invention are well-known to those skilled in the art.

[0039] Example 1:

[0040] like Figures 1 to 8As shown, this invention discloses a hydraulically driven intelligent lid-applying DCAC electronic control system for a mixed-rail vehicle. The mixed-rail vehicle includes an active end 34 and a driven end 35, with a tank body 33 positioned between them. The top of the tank body 33 has a tank opening 36, and a lid 32 is movably mounted at the tank opening 36. The active end 34 includes a housing 37, inside which is a hydraulic station 8. A hydraulic actuator 9, whose front end is fixedly connected to the lid 32, is movably mounted on the top. The hydraulic station 8 is connected to the hydraulic actuator 9 via pipelines to form a hydraulic system, providing hydraulic oil to the actuator 9 and enabling the lid 32 to be applied to or removed from the tank opening 36. Specifically, the hydraulic station 8 is sequentially connected to an oil pump via pipelines. 81. Solenoid valve platform 82 and accumulator 17. Solenoid valve platform 82 is connected to hydraulic actuator 9 through pipeline. Hydraulic actuator 9 and accumulator 17 are equipped with detection device 10. Hydraulic oil is supplied through oil pump 81. Hydraulic actuator 9 includes multiple hydraulic devices. Solenoid valve platform 82 includes multiple solenoid valves and is connected to each hydraulic device in hydraulic actuator 9 and accumulator 17 respectively. Detection device 10 is used to detect the position (X, Y axis) of can lid 32 when adding or removing lid through hydraulic actuator 9. Accumulator 17 is used to release stored pressure during adding or removing lid to quickly perform the action of lifting and lowering the insulated can lid, thus alleviating the long response time of hydraulic cylinder in building up rated pressure. More specifically, the hydraulic actuator 9 includes a telescopic guide seat 30 movably mounted on the top of the housing 37. A telescopic hydraulic cylinder 27 is provided on the outer side of the telescopic guide seat 30, and a telescopic rod 31 is movably mounted on the inner side. A lifting hydraulic cylinder 28 is movably mounted between the bottom and the housing 37. The telescopic rod 31 is connected to the hydraulic rod end of the telescopic hydraulic cylinder 27. To facilitate the arrangement of the components of the hydraulic actuator 9, a fixed seat 40 is provided on the top of the housing 37. A rotating lug seat 42 and a mounting seat 46 are respectively installed at the front and rear ends of the fixed seat 40. The rotating lug seat 42 contains... A rotating shaft 43 is provided, and a curved arm 44 is movably mounted on the mounting base 46. One end of the curved arm 44 is movably connected to the hydraulic rod of the lifting and lowering hydraulic cylinder 28, and the other end is movably connected to the bottom of the telescopic guide seat 30 through the connecting seat 45. A rotating ear 41 is provided at the bottom front side of the telescopic guide seat 30, and the rotating ear 41 is rotatably connected to the rotating shaft 43. The telescopic guide seat 30 can be lifted and lowered by the lifting and lowering hydraulic cylinder 28, thereby enabling the can cover 32 installed at the end of the telescopic rod 31 to complete the lifting and lowering action. Similarly, the can cover 32 can be telescopically extended and retracted by the telescopic hydraulic cylinder 27.

[0041] The entire electrical control system includes an electrical control cabinet 23 located on one side of the active end 34, adjacent to the hydraulic station 8. The cabinet contains a battery pack 3, a frequency converter 7, a PLC 11, and a feedback unit 16. The battery pack 3 can use a 30kWh lithium iron phosphate battery and includes an RS-485 communication interface for reading, uploading, and monitoring battery information. It has dual DC48V / DC24V outputs; the DC48V output is connected to a DC / AC module 4, providing power, while the DC24V output is connected to a control power supply 5. The control power supply 5 provides control power to the various control units in the electrical control system. The DC24V output can also be directly used as control power supply 5. The output of the DC / AC module 4 is connected to the R, S, and T inputs of the inverter 7. It has low power consumption, meets long standby requirements, and has an output power of not less than 5.5KW, providing AC380V power to the inverter. It includes an RS-485 communication interface for reading, uploading, and monitoring module information. The inverter 7 uses an ABB series inverter, and its U, V, and W outputs are connected to the oil pump 81, supplying power to the hydraulic system. The PLC 11 provides hydraulic pressure and replenishes the accumulator 17; it controls the entire electrical control system and can be a Siemens S7-200Smart series PLC, including AI / AO and wireless AP modules. Its input terminals are connected to an operation unit for inputting control commands and a feedback unit 16 for receiving various information from various components of the electrical control system. Its output terminals are connected to a drive circuit 12 and a protection circuit 13, respectively. The drive circuit 12 controls the normal operation of the frequency converter 7 and the solenoid valve platform 82, and is connected to the frequency converter 7, the solenoid valve platform 82, and the protection circuit, respectively. The protection circuit 13 is connected to the drive circuit 12 to ensure its safe operation. The battery pack 3, DC / AC module 4, detection device 10 and protection circuit 13 are connected to the feedback unit 16 by communication cables to collect information such as battery power, output voltage / current, actuator amplitude, hydraulic pressure and temperature, and then transmit it to the PLC 11 through the feedback unit 16. The output terminal of the control power supply 5 is connected to the PLC 11, drive circuit 12, protection circuit 13, detection device 10 and feedback unit 16 respectively and provides them with control power.

[0042] In this embodiment, the solenoid valve platform 82 includes an overflow valve Y5 connected to the oil pump 81 via a pipeline. The overflow valve Y5 is connected to a cover-raising solenoid valve Y1, a cover-lowering solenoid valve Y2, an arm-extending solenoid valve Y3, an arm-retracting solenoid valve Y4, and an accumulator solenoid valve Y6 via pipelines. The cover-raising solenoid valve Y1 and the cover-lowering solenoid valve Y2 are connected to the cover-raising / lowering hydraulic cylinder 28 via pipelines. The arm-extending solenoid valve Y3 and the arm-retracting solenoid valve Y4 are connected to the telescopic hydraulic cylinder 27 via pipelines. The accumulator solenoid valve Y6 is connected to the accumulator 17 via a pipeline. The detection device 10 includes... The X-axis displacement sensor 25 and Y-axis displacement sensor 26 are installed inside the telescopic hydraulic cylinder 27 and the lifting hydraulic cylinder 28, and the overflow valve pressure sensor 38 is installed on the accumulator 17. The X-axis displacement sensor 25 and Y-axis displacement sensor 26 are both built-in magnetic ring type displacement sensors (such as the Nadu MH series built-in magnetic ring displacement sensor). The X-axis displacement sensor 25, Y-axis displacement sensor 26 and overflow valve pressure sensor 38 are respectively connected to the feedback unit 16 through lines, and respectively transmit the information monitored by each to the feedback unit 16.

[0043] In this embodiment, the operating unit can be one or more of a remote operating unit, a local operating unit 15, and a touch screen operating unit. It can be controlled using a single method or multiple methods can be coordinated according to the site conditions. Each control unit is specifically configured as follows:

[0044] The remote operation unit includes a wireless AP6 connected to the PLC11 and a ground control unit 39 wirelessly connected to the wireless AP6. The ground control unit 39 includes a host computer and other equipment. It establishes communication with the PLC11 through the wireless AP6, receives relevant information of the controlled mixed-rail vehicle, and sends instructions for adding or removing covers through the host computer.

[0045] The local operation unit 15 includes an onboard operation box 24 located on the edge of the active end 34. Typically, one is installed on each side of the active end 34, both before and after, for easy operation. The mechanical operation box 24 is equipped with a one-button lift-up button 19, a one-button lower-up button 20, and an emergency stop button 18, each with its own indicator light. The two ends of the one-button lift-up button 19, the one-button lower-up button 20, and the emergency stop button 18 are respectively connected to the output terminal of the control power supply 5 and the input terminal of the PLC 11. When the system is working, pressing the one-button lift button 19 will cause the indicator light to flash. The hydraulic actuator 9 will then begin lifting the lid to the limit value, followed by retracting the arm. The action will end when the arm retraction limit value is reached, and the indicator light on the one-button lift button 19 will remain on. Pressing the one-button lower button 20 will turn off the one-button lift button 19 indicator light and cause the one-button lower button 20 indicator light to flash. The hydraulic actuator 9 will then begin extending the arm to the extension limit value and continue lowering the lid to the lowering limit value, after which the action will end, and the indicator light on the one-button lower button 20 will remain on. In case of an emergency, pressing the emergency stop button 18 will immediately stop the operation.

[0046] The touch screen operation unit includes a touch screen HMI14 connected to the input terminal of PLC11. The touch screen HMI14 is connected to the output terminal of the control power supply 5. The touch screen HMI14 is usually located in the electrical control cabinet. It is connected to PLC11 via DP9 / RS-485 communication line and communicates with it. It has relevant programs for the control of the mixed-rail vehicle set in advance and receives and displays various information from various sensors, devices, etc. Figure 2 and Figure 3The diagram shows the main interface and maintenance interface of the HMI. The main interface includes buttons for switching between "Home," "Maintenance," "I / O," and "Alarm" screens. The "Home" screen includes a "Battery" information box, providing real-time feedback on battery pack 3's current, output voltage, remaining charge, health, and remaining capacity; a "DC / AC" information box, providing real-time feedback on DC / AC module 4's temperature, input voltage, output voltage, and output current; and a "Hydraulic Actuator" information box, providing real-time feedback on the pressure in hydraulic station 8, hydraulic actuator 9, and accumulator 17, as well as the X-axis and Y-axis extension / retraction values ​​of the can lid. The home screen also features a real-time animation of lid application, flashing "Lid Lifting" and "Lid Lowering" indicators, and constantly lit "Completed" and "Timeout" indicators. The home screen also includes buttons for "One-Click Lid Lifting," "One-Click Lid Lowering," and "Reset" for local system control. The "Maintenance" screen includes a "Vehicle Sensor X-Axis" information box. The system includes a pop-up window that provides real-time feedback on the position of the hydraulic actuator 9 telescopic arm, featuring constantly lit indicators for "Extended" and "Retracted," a display of the actual value of "Can lid X-axis extension," and editable settings for "Extended >", "Extended <", "Retracted >", and "Retracted <". A "Vehicle-mounted Sensor Y-axis" window provides real-time feedback on the lifting and lowering position of the hydraulic actuator 9, also featuring constantly lit indicators for "Lifted" and "Lowered," a display of the actual value of "Can lid Y-axis extension," and editable settings for "Lifted >", "Lifted <", "Lower >", and "Lower <". A "Equipment Operation" window enables local jogging control with separate "Jogging Mode," "Lift," "Lower," "Extend," and "Retract" buttons. In jogging mode, pressing these four buttons will perform the lifting, lowering, extending, and retracting actions. An alarm page displays fault records; the I / O page allows checking the emergency stop button position, one-button lid lifting, and one-button lid lowering actions.

[0047] In this embodiment, the electrical control system also includes a DC / AC working relay KA1 and a frequency converter start relay KA2. The drive circuit 12 includes coils of the DC / AC working relay KA1, the frequency converter start relay KA2, the cover lifting solenoid valve Y1, the cover lowering solenoid valve Y2, the arm extension solenoid valve Y3, the arm retraction solenoid valve Y4, the overflow valve Y5, and the accumulator solenoid valve Y6, which are respectively connected to the output terminal of the PLC 11. The protection circuit 13 includes a normally open contact of the DC / AC working relay KA1 connected to the output terminal of the PLC 11 and the input terminal of the DC / AC module 4, and a normally open contact of the frequency converter start relay KA2 connected to the input terminal of the frequency converter 7.

[0048] In this embodiment, the electronic control system also includes a ground power supply unit 1 installed on the ground and an external power supply unit 2 installed on the mixed-rail vehicle. The external power supply unit 2 includes a charger connected to the battery pack 3 for charging the battery pack 3. The ground power supply unit 1 can provide a three-phase four-wire AC 380V power supply to the external power supply unit 2 to charge the battery pack 3 through the charger. In this embodiment, there are two implementation methods. The first method is that the ground power supply unit 1 includes a power plug with AC power, and the external power supply unit 2 includes an emergency charging socket 22 connected to the charger and a charging indicator light 21. The emergency charging socket 22 and the charging indicator light 21 can be installed on the panel of the onboard operation box 24 for convenient emergency charging. When charging, the charging indicator light 21 lights up. The other power supply method is that the ground power supply unit 1 includes an external power connection device installed on the ground, and the external power supply unit 2 includes a power connection port adapted to the external power connection device and connected to the charger. When the mixed-rail vehicle moves to the vicinity of the external power connection device, it automatically connects to the external power supply unit 2 for charging.

[0049] In this embodiment, to facilitate the rapid disassembly, assembly, maintenance, and replacement of the electronic control system, each control unit can be set as a discrete module. For example, the main control components of the electronic control system are all placed in the electronic control cabinet 23, and can be connected to the airborne operation box 24, detection device 10, etc. through the module coupling device 29. The ground power supply unit 1 and the external power supply unit 2 can also be connected by the module coupling device 29. Various sensors in the detection device 10 can be installed on the hydraulic actuator 9 and the hydraulic station 8. The supporting equipment for each sensor can be integrated and installed together and connected through the module coupling device 29.

[0050] In this embodiment, the panel of the airborne operation box 24 can also be equipped with various jog control buttons and corresponding indicator lights, such as those in the touch screen HMI maintenance interface, so that the corresponding lifting and lowering of the cover can be controlled by these buttons.

[0051] Example 2:

[0052] This invention discloses a control method for a hydraulically driven intelligent cover-addressing DCAC electronic control system for a mixed-rail vehicle, as described in Embodiment 1. The system is described with three types of operation units: a remote operation unit, a local operation unit 15, and a touchscreen operation unit. These three units can operate individually or in combination. Each method will be described in detail below:

[0053] Control preparation: Battery pack 3 supplies DC 48V power to DC / AC module 4. DC / AC module 4 performs self-test and transmits the self-test result to AI / AO module of PLC11 via feedback unit 16. If DC / AC module 4 performs self-test without error, PLC11 outputs a signal to drive circuit 12. The coil of DC / AC working relay KA1 in drive circuit 12 is energized and closed. The normally open contact of DC / AC working relay KA1 in protection circuit 13 is closed, so that DC / AC module 4 outputs AC 380V power to supply the inverter 7. If DC / AC module 4 fails self-test, DC / AC module 4 has no output and sends an alarm message through PLC11. This alarm message can be fed back to the alarm page of touch screen HMI14 and simultaneously sent to ground control unit 39 via wireless AP6 for display in host computer.

[0054] Airborne control box 24 local control:

[0055] "One-button lid lifting" control: Pressing the one-button lid lifting button 19 on the control panel 24 inputs a "one-button lid lifting" start signal to PLC 11, and the action program is executed. PLC 11 outputs a signal to drive circuit 12. In drive circuit 12, the coil of inverter start relay KA2 is energized and closes, the normally open contact of inverter start relay KA2 closes, and inverter 7 starts working. The U, V, and W terminals of inverter 7 output AC power of the set frequency to the motor of oil pump 81 in hydraulic station 8. The motor of oil pump 81 starts running under no-load. PLC 11 executes a delay action program, and after N seconds, outputs a signal to drive circuit 12. In drive circuit 12, the overflow valve Y5 line... When the coil is energized, the hydraulic system begins to load, and the motor of oil pump 81 operates at full load to deliver pressure. Simultaneously, PLC 11 executes the action program and outputs a signal to drive circuit 12. In drive circuit 12, the coils of accumulator solenoid valve Y6 and lid-lifting solenoid valve Y1 are energized, and the rated pressure stored in accumulator 17 begins to be released, acting on the lifting hydraulic cylinder 28 in hydraulic actuator 9 to complete the lid-lifting action. The Y-axis displacement sensor 26 in detection device 10 simultaneously sends a signal to feedback unit 16, which sends a dynamic position signal to PLC 11. When the lid-lifting position setting value is reached, the coil of lid-lifting solenoid valve Y1 is de-energized, and hydraulic actuator 9 stops lifting the lid. The PLC11 executes the action program, energizing the coil of the boom retraction solenoid valve Y4 in the drive circuit 12, which acts on the telescopic hydraulic cylinder 27 in the hydraulic actuator 9 to complete the boom retraction action. Simultaneously, the X-axis displacement sensor 25 in the detection device 10 sends a signal to the feedback unit 16, which then sends the dynamic position signal to the AI / AO module of the PLC11. When the boom retraction position setting value is reached, the boom retraction solenoid valve Y4 coil is de-energized, and the hydraulic actuator 9 stops the boom retraction action. The PLC11 then executes the program, energizing the overflow valve Y5 coil and the accumulator solenoid valve Y6 coil in the drive circuit 12 to supplement the pressure of the accumulator 17. This is then monitored by the detection device. The pressure sensor 38 in the 10th position synchronously sends the signal to the feedback unit 16. The feedback unit 16 sends the dynamic pressure signal to the AI / AO module of PLC11. When the pressure of the accumulator 17 reaches the rated value, PLC11 executes the program. The overflow valve Y5 coil and the accumulator solenoid valve Y6 coil in the drive circuit 12 are de-energized. The DC / AC working relay KA1 and the inverter start solenoid valve KA2 coil are de-energized. The normally open contact of the DC / AC working relay KA1 and the inverter start solenoid valve KA2 in the drive circuit 12 is opened. The inverter 7 and the DC / AC module 4 stop working. The oil pump 81 motor in the hydraulic station 8 stops. The one-button cover lifting action ends.

[0056] "One-touch lid closing" control: Pressing the one-touch lid closing button 20 on the control panel 24 inputs a "one-touch lid closing" start signal to PLC 11 and executes the action program. PLC 11 outputs a signal to drive circuit 12, energizing the coil of inverter start relay KA2 in drive circuit 12. The normally open contact of inverter start relay KA2 closes, and inverter 7 starts working. The U, V, and W terminals of inverter 7 output AC power of the set frequency to the motor of oil pump 81 in hydraulic station 8. The motor of oil pump 81 starts running under no-load. PLC 11 executes a delay action program, and after N seconds, outputs a signal to drive circuit 12. The overflow valve Y5 coil in drive circuit 12... When energized, the hydraulic system begins to load, and the motor of oil pump 81 operates at full load to deliver pressure. Simultaneously, PLC 11 executes the action program and outputs a signal to drive circuit 12. In drive circuit 12, the coils of accumulator solenoid valve Y6 and extension arm solenoid valve Y3 are energized, and the rated pressure stored in accumulator 17 begins to be released, acting on the telescopic hydraulic cylinder 27 in hydraulic actuator 9 to complete the extension arm action. Simultaneously, X-axis displacement sensor 25 in detection device 10 sends a signal to feedback unit 16, which sends a dynamic position signal to PLC 11. When the extension arm position setting value is reached, the coil of extension arm solenoid valve Y3 is de-energized, and hydraulic actuator 9 stops the extension arm action. When PLC11 executes the action program, the coil of the cover-dropping solenoid valve Y2 in the drive circuit 12 is energized, which acts on the lifting and lowering hydraulic cylinder 28 in the hydraulic actuator 9 to complete the cover-dropping action. Simultaneously, the Y-axis displacement sensor 26 in the detection device 10 sends a signal to the feedback unit 16, which then sends the dynamic position signal to the AI / AO module of PLC11. When the cover-dropping position setting value is reached, the coil of the cover-dropping solenoid valve Y2 is de-energized, and the hydraulic actuator 9 stops the cover-dropping action. PLC11 then executes the program, and the coils of the overflow valve Y5 and the accumulator solenoid valve Y6 in the drive circuit 12 remain energized, supplementing the pressure of the accumulator 17. This pressure is then transmitted through the detection device. Pressure sensors 38 in the 10th layer synchronously send signals to feedback unit 16. Feedback unit 16 sends dynamic pressure signals to AI / AO module of PLC11. When the pressure of accumulator 17 reaches the rated value, PLC11 executes the program. The overflow valve Y5 coil and accumulator solenoid valve Y6 coil in drive circuit 12 are de-energized. The DC / AC working relay KA1 and inverter start relay KA2 coils are de-energized. The normally open contacts of DC / AC working relay KA1 and inverter start relay KA2 in drive circuit 12 are opened. Inverter 7 and DC / AC module 4 stop working. The motor of oil pump 81 in hydraulic station 8 stops. The one-button cover closing action ends.

[0057] "Emergency Stop" Control: Press the emergency stop button 18 on the panel of the onboard operation box 24 to input an "emergency stop" start signal to PLC11. PLC11 executes the program and outputs a signal to de-energize the coils of DC / AC working relay KA1 and inverter start relay KA2. The normally open contacts of DC / AC working relay KA1 and inverter start relay KA2 in drive circuit 12 are opened, and the system stops working.

[0058] The remote control unit controls "one-button lid lifting" and "one-button lid lowering":

[0059] The ground control unit 39 establishes communication with the PLC 11 via the vehicle-mounted wireless AP6 of the mixed-rail vehicle. The ground control unit 39 receives relevant information about the controlled mixed-rail vehicle and sends control commands through the host computer screen to perform "one-click lifting" and "one-click lowering" operations on the hydraulic actuator 9 of the mixed-rail vehicle via the vehicle-mounted wireless AP6 and PLC 11. It also receives real-time information such as the action status and action amplitude of the one-click lifting and lowering of the cover from the electronic control system; information such as the battery pack 3's charge, current, and voltage; information such as the DC / AC module 4's temperature, output voltage, current, and input voltage; the working status of the hydraulic station 8's oil pump motor, the pressure of the accumulator 17, and the action status of each solenoid valve on the solenoid valve platform; the PLC 11's input / output point status; and the inverter's working frequency, current, and alarm information. The remote control method is executed according to the "one-click lifting" and "one-click lowering" method described in the above-mentioned onboard operation box 24, and includes the remote self-test process in "control preparation".

[0060] Touchscreen HMI control:

[0061] Clicking "One-click Lift" or "One-click Lift" on the main interface of the touch screen HMI will enable the control system to complete the corresponding control action. The control method is executed according to the method described in the local operation of the local operation box for "One-click Lift" and "One-click Lift", and includes the self-test process in "Control Preparation". In case of emergency, clicking "Reset" on the main page of the touch screen is similar to the function of the "Emergency Stop" button 18 on the airborne operation box 24, and the electronic control system will immediately stop working.

[0062] Click "Maintenance" on the main touchscreen page to enter this subpage. Click "Jog Mode" in the "Equipment Operation" information box to put the control system into jog operation mode.

[0063] "Lift" jog control: When the finger touches the "Lift" button for a long time, the "Lift" start signal is sent to PLC11. PLC11 executes the action program and outputs a signal to drive circuit 12. The coils of accumulator solenoid valve Y6 and lid lifting solenoid valve Y1 in drive circuit 12 are energized, and the rated pressure stored in accumulator 17 begins to be released, which acts on the lifting hydraulic cylinder 28 in hydraulic actuator 9 to complete the lid lifting action. When the finger leaves the "Lift" button or the Y-axis displacement sensor 26 reaches the lid lifting position setting value, the coils of lid lifting solenoid valve Y1 and accumulator solenoid valve Y6 are de-energized, and hydraulic actuator 9 stops the lid lifting action.

[0064] "Retraction" jog control: A long press of the "Retraction" button sends a "Retraction" start signal to PLC11. PLC11 executes the action program and outputs a signal to drive circuit 12. The coils of accumulator solenoid valve Y6 and retraction solenoid valve Y4 in drive circuit 12 are energized, and the rated pressure stored in accumulator 17 begins to be released, acting on the telescopic hydraulic cylinder 28 in hydraulic actuator 9 to complete the retraction action. When the finger leaves the "Retraction" button or the retraction position is reached by X-axis displacement sensor 25, the coils of retraction solenoid valve Y4 and accumulator solenoid valve Y6 are de-energized, and hydraulic actuator 9 stops the retraction action.

[0065] "Extend" jog control: A long press of the "Extend" button sends an "Extend" start signal to PLC11. PLC11 executes the action program and outputs a signal to drive circuit 12. The coils of accumulator solenoid valve Y6 and extension solenoid valve Y3 in drive circuit 12 are energized, and the rated pressure stored in accumulator 17 begins to be released, acting on the telescopic hydraulic cylinder 28 in hydraulic actuator 9 to complete the extension action. When the finger leaves the "Extend" button or the extension position setting value of X-axis displacement sensor 25 is reached, the coils of extension solenoid valve Y3 and accumulator solenoid valve Y6 are de-energized, and hydraulic actuator 9 stops the extension action.

[0066] "Drop" Inching Control: A long press of the "Drop" button sends a "Drop" start signal to PLC11. PLC11 executes the action program and outputs a signal to drive circuit 12. The coils of accumulator solenoid valve Y6 and cover-dropping solenoid valve Y2 in drive circuit 12 are energized, and the rated pressure stored in accumulator 17 begins to be released, acting on the lifting and lowering hydraulic cylinder 28 in hydraulic actuator 9 to complete the cover-dropping action. When the finger leaves the "Drop" button or the cover-dropping position setting value of Y-axis displacement sensor 26 is reached, the coils of cover-dropping solenoid valve Y2 and accumulator solenoid valve Y6 are de-energized, and hydraulic actuator 9 stops the cover-dropping action.

[0067] During the operation of the "lift," "retract," "extend," and "lower" jog controls, the pressure sensor 38 in the detection device 10 of the hydraulic station 8 synchronously sends signals to the feedback unit 16. The feedback unit 16 sends the dynamic pressure signal to the AI / AO module of the PLC 11. When the pressure of the accumulator 17 is lower than the set value, the PLC 11 executes the accumulator 17 pressure replenishment program. The PLC 11 outputs a signal to the drive circuit 12, energizing the coil of the DC / AC working relay KA1 in the drive circuit 12. The normally open contact of the DC / AC working relay KA1 in the protection circuit 13 closes, and the DC / AC module 4 outputs AC power to supply the inverter 7. The inverter 7 starts to power on. At the same time, the coil of the inverter starting relay KA2 in the drive circuit 12 is energized, and the normally open contact of the inverter starting relay KA2 closes, starting the inverter 7. The inverter 7 outputs AC power of the set frequency to the motor of the oil pump 81 in the hydraulic station 8. The motor of PLC 11 starts running under no-load. PLC 11 executes the delay action program. After N seconds, it outputs a signal to drive circuit 12. The coils of relief valve Y5 and accumulator solenoid valve Y6 in drive circuit 12 are energized, and the hydraulic system starts loading. The motor of oil pump 81 runs at full load to deliver pressure to accumulator 17. The pressure sensor 38 in the detection device 10 of hydraulic station 8 synchronously sends the signal to feedback unit 16. Feedback unit 16 sends the dynamic pressure signal to AI / AO module of PLC 11. When the pressure of accumulator 17 reaches the rated value, PLC 11 executes the program. The coils of relief valve Y5 and accumulator solenoid valve Y6 in drive circuit 12 are de-energized. The coils of DC / AC working relay KA1 and inverter start relay KA2 are de-energized. The normally open contacts of DC / AC working relay KA1 and inverter start relay KA2 in drive circuit 12 are opened. Inverter 7 and DC / AC module 4 stop working. The motor of oil pump 81 in hydraulic station 8 stops, and the pressure replenishment of accumulator 17 ends. In this embodiment, the set values ​​of the telescopic hydraulic cylinder 28, the lifting hydraulic cylinder 28, and the accumulator 17 are set in advance in the relevant program or input through the touch screen HMI, host computer, etc.

Claims

1. A hydraulically driven intelligent lid-sealing DCAC electronic control system for a mixed-rail vehicle, the mixed-rail vehicle comprising an active end (34), a driven end (35), and a tank body (33) disposed between the two and having a tank opening (36), a tank cover (32) movably disposed at the tank opening (36), the active end (34) comprising a housing (37), a hydraulic station (8) disposed inside the housing (37), and a hydraulic actuator (9) movably disposed at the top, the front end of which is fixedly connected to the tank cover (32), characterized in that: The electrical control system includes an electrical control cabinet (23) and a battery pack (3), a frequency converter (7), a PLC (11), and a feedback unit (16) located inside the electrical control cabinet (23); the hydraulic station (8) is connected in sequence to an oil pump (81), a solenoid valve platform (82), and an accumulator (17) via pipelines. The solenoid valve platform (82) is connected to a hydraulic actuator (9) via pipelines. The hydraulic actuator (9) and the accumulator (17) are equipped with detection devices (10); the battery pack (3) includes a DC48V output terminal and a DC24V output terminal. The DC48V output terminal is connected to a DC / AC module (4), and the DC24V output terminal is connected to a control power supply (5). The output terminal of the DC / AC module (4) is connected to... The input terminal of the frequency converter (7) is connected to the oil pump (81), and the output terminal of the frequency converter (7) is connected to the oil pump (81); the input terminal of the PLC (11) is connected to the operation unit and the feedback unit (16), and its output terminal is connected to the drive circuit (12) and the protection circuit (13) respectively. The drive circuit (12) is connected to the frequency converter (7), the solenoid valve platform (82) and the protection circuit (13) respectively; the battery pack (3), the DC / AC module (4), the detection device (10) and the protection circuit (13) are connected to the feedback unit (16) respectively; the output terminal of the control power supply (5) is connected to the PLC (11), the drive circuit (12), the protection circuit (13), the detection device (10) and the feedback unit (16) respectively. The solenoid valve platform (82) includes an overflow valve (Y5) connected to the oil pump (81) via a pipeline. The overflow valve (Y5) is connected to a cover-raising solenoid valve (Y1), a cover-lowering solenoid valve (Y2), an arm-extending solenoid valve (Y3), an arm-retracting solenoid valve (Y4), and an accumulator solenoid valve (Y6) via pipelines. The cover-raising solenoid valve (Y1) and the cover-lowering solenoid valve (Y2) are connected to the cover-raising and lowering hydraulic cylinder (28) via pipelines. The arm-extending solenoid valve (Y3) and the arm-retracting solenoid valve (Y4) are connected to the telescopic hydraulic cylinder (27) via pipelines. The accumulator solenoid valve (Y6) is connected to the cover-raising and lowering hydraulic cylinder (28) via pipelines. The accumulator (17) is connected; the detection device (10) includes an X-axis displacement sensor (25) and a Y-axis displacement sensor (26) respectively installed inside the telescopic hydraulic cylinder (27) and the lifting hydraulic cylinder (28), and an overflow valve pressure sensor (38) installed on the accumulator (17); the X-axis displacement sensor (25), the Y-axis displacement sensor (26) and the overflow valve pressure sensor (38) are respectively connected to the feedback unit (16) through lines; the X-axis displacement sensor (25) and the Y-axis displacement sensor (26) are both built-in magnetic ring type displacement sensors; The electrical control system also includes a DC / AC working relay (KA1) and a frequency converter start relay (KA2). The drive circuit (12) includes coils of the DC / AC working relay (KA1), the frequency converter start relay (KA2), the cover lifting solenoid valve (Y1), the cover lowering solenoid valve (Y2), the arm extension solenoid valve (Y3), the arm retraction solenoid valve (Y4), the overflow valve (Y5), and the accumulator solenoid valve (Y6) respectively connected to the output terminal of the PLC (11). The protection circuit (13) includes the normally open contact of the DC / AC working relay (KA1) connected between the output terminal of the PLC (11) and the input terminal of the DC / AC module (4) and the normally open contact of the frequency converter start relay (KA2) connected to the input terminal of the frequency converter (7).

2. The DCAC electronic control system for hydraulically driven intelligent cover application in a mixed-rail vehicle according to claim 1, characterized in that: The electronic control system also includes a ground power supply unit (1) installed on the ground and an external power supply unit (2) installed on the hybrid vehicle. The external power supply unit (2) includes a charger connected to the battery pack (3).

3. The DCAC electronic control system for hydraulically driven intelligent cover application in a mixed-rail vehicle according to claim 2, characterized in that: The ground power supply unit (1) includes a power plug with AC power, and the external power unit (2) includes an emergency charging socket (22) connected to the charger and a charging indicator light (21).

4. The DCAC electronic control system for hydraulically driven intelligent cover application in a mixed-rail vehicle according to claim 2, characterized in that: The ground power supply unit (1) includes an external power connection device installed on the ground, and the external power connection unit (2) includes a power connection port that is adapted to the external power connection device and connected to the charger.

5. A hydraulically driven intelligent cover-adding DCAC electronic control system for mixed-rail vehicles according to any one of claims 2-4, characterized in that: The hydraulic actuator (9) includes a telescopic guide seat (30) movably disposed on the top of the housing (37). A telescopic hydraulic cylinder (27) is provided on the outside of the telescopic guide seat (30), and a telescopic rod (31) is movably disposed on the inside. A lifting and lowering hydraulic cylinder (28) is movably disposed between the bottom and the housing (37). The telescopic rod (31) is connected to the hydraulic rod end of the telescopic hydraulic cylinder (27). A fixed seat (40) is provided on the top of the housing (37). A rotating ear seat (42) and a mounting seat (46) are respectively installed on the front and rear ends of the fixed seat (40). A rotating shaft (43) is provided inside the rotating ear seat (42). A bent arm (44) is movably mounted on the mounting seat (46). One end of the bent arm (44) is movably connected to the hydraulic rod of the lifting and lowering hydraulic cylinder (28), and the other end is movably connected to the bottom of the telescopic guide seat (30) through a connecting seat (45). A rotating ear (41) is provided on the bottom front side of the telescopic guide seat (30). The rotating ear (41) is rotatably connected to the rotating shaft (43).

6. The DCAC electronic control system for hydraulically driven intelligent cover application in a mixed-rail vehicle according to claim 5, characterized in that: The operation unit is one or more of a remote operation unit, a local operation unit (15), and a touch screen operation unit; The remote operation unit includes a wireless AP (6) connected to the PLC (11) and a ground control unit (39) wirelessly connected to the wireless AP (6). The local operation unit (15) includes an airborne operation box (24) located on the edge of the active end (34). The airborne operation box (24) is equipped with a one-button lift-up button (19), a one-button lower-up button (20), and an emergency stop button (18) with built-in indicator lights. The two ends of the one-button lift-up button (19), the one-button lower-up button (20), and the emergency stop button (18) are respectively connected to the output end of the control power supply (5) and the input end of the PLC (11). The touch screen operation unit includes a touch screen HMI (14) connected to the input terminal of the PLC (11), and the touch screen HMI (14) is connected to the output terminal of the control power supply (5).

7. The DCAC electronic control system for hydraulically driven intelligent cover application in a mixed-rail vehicle according to claim 6, characterized in that: The ground power supply unit (1) and the external power supply unit (2), the electrical control cabinet (23) and the airborne operation box (24) and the detection device (10), and the detection device (10) and the hydraulic actuator (9) and the hydraulic station (8) are all connected by a module coupling device (29).

8. A control method based on the hydraulically driven intelligent cover-adding DCAC electronic control system for mixed-rail vehicles as described in claim 7, characterized in that, include: Control preparation: The battery pack (3) supplies power to the DC / AC module (4). The DC / AC module (4) performs a self-test and transmits the self-test result to the PLC (11) via the feedback unit (16). If the DC / AC module (4) performs a self-test without error, the PLC (11) outputs a signal to the drive circuit (12). The coil of the DC / AC working relay (KA1) in the drive circuit (12) is energized and closed. The normally open contact of the DC / AC working relay (KA1) in the protection circuit (13) is closed, so that the DC / AC module (4) outputs AC power to supply the inverter (7) for operation. If the DC / AC module (4) performs a self-test without error, the DC / AC module (4) has no output and sends an alarm message through the PLC (11). "One-click lid lifting" control: The operation unit inputs a "one-click lid lifting" start signal to the PLC (11) and executes the action program. The PLC (11) outputs a signal to the drive circuit (12). The coil of the inverter start relay (KA2) in the drive circuit (12) is energized and closes. The normally open contact of the inverter start relay (KA2) closes, and the inverter (7) starts working. The inverter (7) outputs AC power of the set frequency to the motor of the oil pump (81) in the hydraulic station (8). The motor of the oil pump (81) starts running under no-load. The PLC (11) executes the delay action program. After N seconds, it outputs a signal to the drive circuit (12). The coil of the overflow valve (Y5) in the drive circuit (12) is energized, and the hydraulic system starts loading. The oil pump ( 81) The motor is running at full load to deliver pressure; at the same time, PLC (11) executes the action program and outputs a signal to the drive circuit (12). The coils of the accumulator solenoid valve (Y6) and the lid lifting solenoid valve (Y1) in the drive circuit (12) are energized, and the rated pressure stored in the accumulator (17) begins to be released, acting on the lifting hydraulic cylinder (28) in the hydraulic actuator (9) to complete the lid lifting action. The Y-axis displacement sensor (26) in the detection device (10) simultaneously sends a signal to the feedback unit (16). The feedback unit (16) sends the dynamic position signal to PLC (11). When the lid lifting position setting value is reached, the lid lifting solenoid valve (Y1) coil is de-energized, and the hydraulic actuator (9) stops the lid lifting action; PLC (11) When the action program is executed, the coil of the boom retraction solenoid valve (Y4) in the drive circuit (12) is energized, which acts on the telescopic hydraulic cylinder (27) in the hydraulic actuator (9) to complete the boom retraction action. The X-axis displacement sensor (25) in the detection device (10) simultaneously sends a signal to the feedback unit (16), and the feedback unit (16) sends the dynamic position signal to the PLC (11). When the boom retraction position setting value is reached, the coil of the boom retraction solenoid valve (Y4) is de-energized, and the hydraulic actuator (9) stops the boom retraction action. The PLC (11) executes the program, and the coils of the overflow valve (Y5) and the accumulator solenoid valve (Y6) in the drive circuit (12) continue to be energized to supplement the pressure of the accumulator (17). The signal is transmitted through the detection device (10) to the X-axis displacement sensor (25). The pressure sensor (38) synchronously sends the signal to the feedback unit (16), and the feedback unit (16) sends the dynamic pressure signal to the PLC (11). When the pressure of the accumulator (17) reaches the rated value, the PLC (11) executes the program, the overflow valve (Y5) coil and the accumulator solenoid valve (Y6) coil in the drive circuit (12) are de-energized, the DC / AC working relay (KA1) and the inverter start relay (KA2) coils are de-energized, the normally open contacts of the DC / AC working relay (KA1) and the inverter start relay (KA2) in the drive circuit (12) are opened, the inverter (7) and the DC / AC module (4) stop working, the oil pump (81) motor in the hydraulic station (8) stops, and the one-button cover lifting action ends. "One-click lid closing" control: The operation unit inputs the "one-click lid closing" start signal to the PLC (11) and executes the action program. The PLC (11) outputs a signal to the drive circuit (12). The coil of the inverter start relay (KA2) in the drive circuit (12) is energized and closes. The normally open contact of the inverter start relay (KA2) closes and the inverter (7) starts working. The inverter (7) outputs AC power of the set frequency to the motor of the oil pump (81) in the hydraulic station (8). The motor of the oil pump (81) starts to run under no-load. The PLC (11) executes the delay action program and outputs a signal to the drive circuit (12) after N seconds. When the overflow valve (Y5) coil in the drive circuit (12) is energized, the hydraulic system begins to load, and the motor of the oil pump (81) operates at full load to deliver pressure; at the same time, the PLC (11) executes the action program and outputs a signal to the drive circuit (12). The accumulator solenoid valve (Y6) coil and the extension arm solenoid valve (Y3) coil in the drive circuit (12) are energized, and the rated pressure stored in the accumulator (17) begins to be released, acting on the telescopic hydraulic cylinder (27) in the hydraulic actuator (9) to complete the extension arm action. The X-axis displacement sensor (25) in the detection device (10) simultaneously sends a signal to the feedback unit (16), and the feedback unit (16) sends a signal to the feedback unit (17). 6) The dynamic position signal is sent to the PLC (11). When the extension arm reaches the set value, the extension arm solenoid valve (Y3) coil is de-energized, and the hydraulic actuator (9) stops the extension arm movement. The PLC (11) executes the action program, and the cover-dropping solenoid valve (Y2) coil in the drive circuit (12) is energized, which acts on the lifting and lowering hydraulic cylinder (28) in the hydraulic actuator (9) to complete the cover-dropping action. The Y-axis displacement sensor (26) in the detection device (10) simultaneously sends a signal to the feedback unit (16). The feedback unit (16) sends the dynamic position signal to the PLC (11). When the cover-dropping set value is reached, the cover-dropping solenoid valve... (Y2) When the coil is de-energized, the hydraulic actuator (9) stops the cover-closing action; the PLC (11) executes the program, and the overflow valve (Y5) coil and the accumulator solenoid valve (Y6) coil in the drive circuit (12) continue to be energized to supplement the pressure of the accumulator (17). The signal is synchronously sent to the feedback unit (16) through the pressure sensor (38) in the detection device (10). The feedback unit (16) sends the dynamic pressure signal to the PLC (11). When the pressure of the accumulator (17) reaches the rated value, the PLC (11) executes the program to drive the overflow valve (Y5) coil and the accumulator solenoid valve (Y6) coil in the drive circuit (12). When the coil is de-energized, the coils of the DC / AC working relay (KA1) and the inverter starting relay (KA2) are de-energized. The normally open contacts of the DC / AC working relay (KA1) and the inverter starting relay (KA2) in the drive circuit (12) are opened, the inverter (7) and the DC / AC module (4) stop working, the motor of the oil pump (81) in the hydraulic station (8) stops, and the one-button cover closing action ends. "Lift" jog control: The "lift" start signal is sent to PLC (11) through the operation unit. PLC (11) executes the action program and outputs a signal to drive circuit (12). The coils of accumulator solenoid valve (Y6) and cover lifting solenoid valve (Y1) in drive circuit (12) are energized. The rated pressure stored in accumulator (17) begins to be released and acts on the lifting hydraulic cylinder (28) in hydraulic actuator (9) to complete the cover lifting action. After the operation unit sends the stop "lift" signal to PLC (11) or the cover lifting position setting value of Y-axis displacement sensor (26) is reached, the coils of cover lifting solenoid valve (Y1) and accumulator solenoid valve (Y6) are de-energized, and hydraulic actuator (9) stops the cover lifting action. "Retraction" jog control: The "retraction" start signal is sent to PLC (11) through the operation unit. PLC (11) executes the action program and outputs a signal to drive circuit (12). The coils of accumulator solenoid valve (Y6) and retraction solenoid valve (Y4) in drive circuit (12) are energized. The rated pressure stored in accumulator (17) begins to be released and acts on the telescopic hydraulic cylinder (27) in hydraulic actuator (9) to complete the retraction action. After the operation unit sends the stop "retraction" signal to PLC (11) or the retraction position setting value of X-axis displacement sensor (25) is reached, the coils of retraction solenoid valve (Y4) and accumulator solenoid valve (Y6) are de-energized, and hydraulic actuator (9) stops the retraction action. "Extend" jog control: The "Extend" start signal is sent to PLC (11) through the operation unit. PLC (11) executes the action program and outputs a signal to drive circuit (12). The coils of accumulator solenoid valve (Y6) and extension solenoid valve (Y3) in drive circuit (12) are energized. The rated pressure stored in accumulator (17) begins to be released and acts on the telescopic hydraulic cylinder (27) in hydraulic actuator (9) to complete the extension action. After the operation unit sends the stop "Extend" signal to PLC (11) or the extension position setting value of X-axis displacement sensor (25) is reached, the coils of extension solenoid valve (Y3) and accumulator solenoid valve (Y6) are de-energized, and hydraulic actuator (9) stops the extension action. "Drop" jog control: The "drop" start signal is sent to PLC (11) through the operation unit. PLC (11) executes the action program and outputs a signal to drive circuit (12). The coils of accumulator solenoid valve (Y6) and cover-dropping solenoid valve (Y2) in drive circuit (12) are energized. The rated pressure stored in accumulator (17) begins to be released and acts on the lifting and lowering hydraulic cylinder (28) in hydraulic actuator (9) to complete the cover-dropping action. After the operation unit sends the stop "drop" signal to PLC (11) or the cover-dropping position setting value of Y-axis displacement sensor (26) is reached, the coils of cover-dropping solenoid valve (Y2) and accumulator solenoid valve (Y6) are de-energized, and hydraulic actuator (9) stops the cover-dropping action. During the operation of the "lift" jog control, "retract" jog control, "extend" jog control, and "lower" jog control, the pressure sensor (38) in the detection device (10) of the hydraulic station (8) synchronously sends a signal to the feedback unit (16). The feedback unit (16) sends the dynamic pressure signal to the PLC (11). When the pressure of the accumulator (17) is lower than the set value, the PLC (11) executes the accumulator (17) pressure replenishment program. The PLC (11) outputs a signal to the drive circuit (12), and the DC / AC working relay in the drive circuit (12) activates the signal. When the coil of (KA1) is energized and engaged, the normally open contact of the DC / AC working relay (KA1) in the protection circuit (13) closes, and the DC / AC module (4) outputs AC power to supply the inverter (7) for operation. The inverter (7) starts to power on. At the same time, the coil of the inverter starting relay (KA2) in the drive circuit (12) is energized and engaged, and the normally open contact of the inverter starting relay (KA2) closes, and the inverter (7) starts to work. The inverter (7) outputs AC power of the set frequency to the motor of the oil pump (81) in the hydraulic station (8). The motor starts running under no-load. The PLC (11) executes the delay action program. After N seconds, it outputs a signal to the drive circuit (12). The coils of the overflow valve (Y5) and the accumulator solenoid valve (Y6) in the drive circuit (12) are energized, and the hydraulic system starts loading. The motor of the oil pump (81) runs at full load to deliver pressure to the accumulator (17). The signal is synchronously sent to the feedback unit (16) through the pressure sensor (38) in the detection device (10) of the hydraulic station (8). The feedback unit (16) sends the dynamic pressure signal to the PLC (11). When the accumulator (17) pressure... After the force reaches the rated value, the PLC (11) executes the program, the overflow valve (Y5) coil and the accumulator solenoid valve (Y6) coil in the drive circuit (12) are de-energized, the DC / AC working relay (KA1) and the inverter start relay (KA2) coils are de-energized, the normally open contacts of the DC / AC working relay (KA1) and the inverter start relay (KA2) in the drive circuit (12) are opened, the inverter (7) and the DC / AC module (4) stop working, the motor of the oil pump (81) in the hydraulic station (8) stops, and the accumulator (17) finishes pressure replenishment; "Emergency Stop" Control: The "emergency stop" start signal is input to the PLC (11) through the operation unit. The PLC (11) executes the program and outputs a signal to de-energize the coils of the DC / AC working relay (KA1) and the inverter start relay (KA2). The normally open contacts of the DC / AC working relay (KA1) and the inverter start relay (KA2) in the drive circuit (12) are opened, and the system stops working.

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