CN111594496A - Low-power-consumption flow self-adaptive hydraulic position closed-loop control system and method - Google Patents

Low-power-consumption flow self-adaptive hydraulic position closed-loop control system and method Download PDF

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Publication number
CN111594496A
CN111594496A CN202010392254.8A CN202010392254A CN111594496A CN 111594496 A CN111594496 A CN 111594496A CN 202010392254 A CN202010392254 A CN 202010392254A CN 111594496 A CN111594496 A CN 111594496A
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China
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oil port
valve
oil
hydraulic
communicated
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丘铭军
焦悦
郭星良
雷丛卉
郭佳
王亚强
赵春丽
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China National Heavy Machinery Research Institute Co Ltd
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China National Heavy Machinery Research Institute Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
    • F15B11/126—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators of the standard type with special circuit controlling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/10—Special arrangements for operating the actuated device with or without using fluid pressure, e.g. for emergency use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/14—Special measures for giving the operating person a "feeling" of the response of the actuated device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/001—Servomotor systems with fluidic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/655—Methods of contamination control, i.e. methods of control of the cleanliness of circuit components or of the pressure fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6656—Closed loop control, i.e. control using feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/895—Manual override

Abstract

The invention relates to the field of molten steel smelting and forming, in particular to a low-power-consumption flow self-adaptive hydraulic position closed-loop control system and a method, wherein the position of a stopper rod hydraulic cylinder is controlled by a pressure-reducing energy-storage filtering unit, an emergency closing unit, a hydraulic closed-loop control unit and an actuator unit, and four groups of pilot type high-frequency response flow self-adaptive control units with the same structure and function in the hydraulic closed-loop control unit to replace the conventional servo valve (proportional valve), so that the defects of poor system anti-pollution capacity, high failure rate, large power consumption, high price and the like caused by the conventional servo valve (proportional valve) are overcome; meanwhile, the speed stepless regulation of the stopper rod hydraulic cylinder at low speed and high speed can be realized by adopting the pilot type high-frequency response flow self-adaptive control unit, and the position of the stopper rod hydraulic cylinder can be accurately controlled.

Description

Low-power-consumption flow self-adaptive hydraulic position closed-loop control system and method
Technical Field
The invention relates to the field of molten steel smelting and forming, in particular to a low-power-consumption flow self-adaptive hydraulic position closed-loop control system and a method.
Background
In the field of molten steel smelting and forming, the closed-loop control of the position of a stopper rod hydraulic cylinder adopts a servo valve (proportional valve) control mode, and the mechanism is that the position of the hydraulic cylinder is detected in real time by a displacement sensor and fed back to a control system so as to adjust the servo valve (proportional valve) to realize accurate position control.
Because the flow regulating range of the servo valve (proportional valve) is large and the response is fast, the system has poor anti-pollution capability, high failure rate and large power consumption; as in chinese patent application No.: 201310417622X hydraulic position closed-loop control system, the position closed-loop control is controlled by servo valve, can realize the position accurate control under low speed and high speed, but this kind of position closed-loop control adopts the servo valve form, because the servo valve antipollution ability is poor, control is complicated, the fault rate is high and the price is expensive etc. shortcoming, so should not be used to the higher, the simpler, operation maintenance more convenient and the lower cost occasion of reliability.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the low-power-consumption flow self-adaptive hydraulic position closed-loop control system and the method, and particularly has the characteristics of lower failure rate, simple structure, larger flow regulation range and lower power consumption.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the low-power-consumption flow self-adaptive hydraulic position closed-loop control system comprises a pressure-reducing and energy-storing filtering unit, an emergency closing unit, a hydraulic closed-loop control unit and an actuator unit, wherein one end of the pressure-reducing and energy-storing filtering unit is communicated with a hydraulic station through an oil pipeline, one ends of the emergency closing unit and the hydraulic closed-loop control unit are connected to the oil pipeline at the other end of the pressure-reducing and energy-storing filtering unit in parallel, and the other ends of the emergency closing unit and the hydraulic closed-loop control unit are communicated with the actuator unit through oil pipelines.
One end of the pressure-reducing and energy-storing filtering unit is provided with an oil inlet P1 and an oil return port T1, the other end of the pressure-reducing and energy-storing filtering unit is provided with an oil port P and an oil port T, one end of the emergency closing unit is provided with the oil port P and the oil port T, the other end of the emergency closing unit is provided with the oil port A, the oil port B, the oil port A1 and the oil port B1, one end of the hydraulic closed-loop control unit is provided with the oil port P and the oil port T, the other end of the hydraulic closed-loop control unit is provided with the oil port A and the oil port B, one end of the actuator unit is provided with the oil port A and the oil port B, the hydraulic station is provided with a hydraulic station pressure oil port P ' and a hydraulic station oil return port T ', the oil inlet P1 of the pressure-reducing and energy-storing filtering unit is communicated with the hydraulic station pressure oil port P ' through an oil pipeline, the oil The oil port P of the unit is communicated, the oil port T of the pressure reduction and energy storage filtering unit is respectively communicated with the oil port T of the emergency closing unit and the oil port T of the hydraulic closed-loop control unit through an oil pipeline, the oil port A of the emergency closing unit is communicated with the oil port A of the actuator unit through an oil pipeline, the oil port B of the emergency closing unit is communicated with the oil port B of the actuator unit through an oil pipeline, the oil port A of the hydraulic closed-loop control unit is communicated with the oil port A1 of the emergency closing unit through an oil pipeline, and the oil port B of the hydraulic closed-loop control unit is communicated with the oil port B1 of the emergency closing unit through.
The pressure reducing and energy storing filtering unit comprises a three-way pressure reducing valve, a filter, a one-way valve, a first ball valve, a second ball valve, an energy accumulator and a first overflow valve, one end of the three-way pressure reducing valve is communicated with a pressure oil port P 'of a hydraulic station and an oil return port T' of the hydraulic station through an oil pipeline, the other end of the three-way pressure reducing valve is communicated with one end of a filter through an oil pipeline, the other end of the filter is communicated with one end of a one-way valve through an oil pipeline, the other end of the one-way valve is communicated with one end of a first ball valve through an oil pipeline, the other end of the first ball valve is communicated with one end of a second ball valve and one end of a first overflow valve through an oil pipeline, an energy accumulator is connected to the oil pipeline, which is communicated with the second ball valve and the first overflow valve, the other ends of the second ball valve and the first overflow valve are communicated with the oil port T of the pressure reducing and energy storing filtering unit through the oil pipeline, and the.
The three-way pressure reducing valve comprises an oil port P, an oil port T and an oil port A, the one-way valve comprises an oil port A and an oil port B, the first ball valve, the second ball valve and the first overflow valve respectively comprise the oil port P and the oil port T, an oil port P of the three-way pressure reducing valve is communicated with a pressure oil port P 'of a hydraulic station through an oil pipeline, an oil port T of the three-way pressure reducing valve is communicated with an oil return port T' of the hydraulic station through the oil pipeline, an oil port A of the three-way pressure reducing valve is communicated with one end of a filter through the oil pipeline, an oil port A of a one-way valve is communicated with the other end of the filter through the oil pipeline, an oil port B of the one-way valve is communicated with the oil port P of a first ball valve through the oil pipeline, the oil port T of the first ball valve is respectively communicated with the oil port P of a second ball valve and the oil port P of a first overflow valve through the oil pipeline, an energy accumulator is connected to the oil pipeline at the oil port T of the first ball valve, and the oil.
The emergency closing unit comprises a first electromagnetic directional valve, a second one-way valve, a third one-way valve, a second electromagnetic directional valve, a second overflow valve, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a first pressure sensor and a second pressure sensor, one end of the first electromagnetic directional valve is respectively communicated with an oil port P and an oil port T of the pressure-reducing energy-storing filtering unit through an oil pipeline, the other end of the first electromagnetic directional valve is respectively communicated with one end of the second one-way valve and one end of the third one-way valve through oil pipelines, the other end of the second one-way valve is respectively communicated with an oil port A of the emergency closing unit and an oil port A1 of the emergency closing unit through oil pipelines, the first pressure sensor is connected to an oil pipeline through which the other end of the second one-way valve is communicated with the oil port A of the emergency closing unit, and the other end of the third one-way valve is respectively communicated with a second pressure sensor, an oil port B of the emergency closing, one end of a second electromagnetic directional valve and one end of a second overflow valve are respectively connected with an oil pipeline communicated with an oil port A of the emergency closing unit through oil pipelines, the other end of the second electromagnetic directional valve and the other end of the second overflow valve are respectively connected with an oil pipeline communicated with the second pressure sensor through an oil pipeline, the second electromagnetic directional valve is communicated with the second overflow valve through an oil pipeline, a first hydraulic control one-way valve is connected with an oil pipeline communicated with an oil port A1 of the emergency closing unit at the other end of the second one-way valve, a second hydraulic control one-way valve is connected with an oil pipeline communicated with an oil port B1 of the emergency closing unit at the other end of the third one-way valve, one end of the first hydraulic control one-way valve and one end of the second hydraulic control one-way valve are respectively communicated with an oil port T of the pressure reduction energy storage filtering unit, an oil port T of the emergency closing unit and an oil port T of the hydraulic closed-loop control unit through, the other end of the first hydraulic control one-way valve and the other end of the second hydraulic control one-way valve are also communicated with an oil pipeline communicated with the other end of the first electromagnetic directional valve and one end of the third one-way valve through the oil pipeline.
The first electromagnetic directional valve and the second electromagnetic directional valve respectively comprise an oil port P, an oil port T, an oil port A and an oil port B, the second one-way valve and the third one-way valve respectively comprise the oil port A and the oil port B, the second overflow valve comprises the oil port P and the oil port T, the first hydraulic control one-way valve and the second hydraulic control one-way valve respectively comprise the oil port A, the oil port B, the oil port X and the oil port Y, the oil port P of the first electromagnetic directional valve is communicated with the oil port P of the emergency closing unit through an oil pipeline, the oil port T of the first electromagnetic directional valve is communicated with the oil port T of the emergency closing unit through an oil pipeline, the oil port A of the first electromagnetic directional valve is communicated with the oil port A of the second one-way valve through an oil pipeline, the oil port B of the first electromagnetic directional valve is communicated with the oil port B of the third one-way valve through an oil pipeline, the oil port B of the second one-way valve is respectively communicated with the oil port, an oil port A of the first hydraulic control one-way valve is communicated with an oil port A1 of the emergency closing unit through an oil pipeline, an oil port A of the third one-way valve is respectively communicated with a second pressure sensor, an oil port B of the emergency closing unit and an oil port B of the second hydraulic control one-way valve through oil pipelines, the oil port A of the second hydraulic control one-way valve is communicated with a B1 of the emergency closing unit through an oil pipeline, an oil port X of the first hydraulic control one-way valve and an oil port X of the second hydraulic control one-way valve are respectively communicated with the oil pipeline communicated with the other end of the first electromagnetic reversing valve and one end of the third one-way valve through pipelines, an oil port Y of the first hydraulic control one-way valve and an oil port Y of the second hydraulic control one-way valve are respectively communicated with an oil port T of the pressure reducing filtering unit, an oil port T of the emergency closing unit and an oil port T of the hydraulic closed-loop control unit through oil pipelines, an oil port P of the second electromagnetic reversing valve and an oil port, an oil port T of the second electromagnetic directional valve and an oil port T of the second overflow valve are respectively communicated with the other end of the oil port A of the third one-way valve and an oil pipeline communicated with an oil port B of the emergency closing unit through pipelines, the oil port A of the second electromagnetic directional valve is communicated with an oil port P of the second overflow valve through a pipeline, and the oil port B of the second electromagnetic directional valve is communicated with the oil port T of the second overflow valve through a pipeline.
The hydraulic closed-loop control unit comprises a first pilot type high-frequency response flow self-adaptive control unit, a second pilot type high-frequency response flow self-adaptive control unit, a third pilot type high-frequency response flow self-adaptive control unit and a fourth pilot type high-frequency response flow self-adaptive control unit which have the same functions, wherein the first pilot type high-frequency response flow self-adaptive control unit, the second pilot type high-frequency response flow self-adaptive control unit, the third pilot type high-frequency response flow self-adaptive control unit and the fourth pilot type high-frequency response flow self-adaptive control unit respectively comprise an oil port A and an oil port P, the oil port A of the first pilot type high-frequency response flow self-adaptive control unit is communicated with the oil port A of the hydraulic closed-loop control unit through an oil pipeline, the oil port P of the first pilot type high-frequency response flow self-adaptive control unit is communicated with the oil port P of the hydraulic closed-loop control unit through an oil pipeline, the oil port P of the second pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port B of the hydraulic closed-loop control unit through an oil pipeline, the oil port A of the second pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port T of the hydraulic closed-loop control unit through an oil pipeline, the oil port A of the third pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port B of the hydraulic closed-loop control unit through an oil pipeline, the oil port P of the third pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port P of the hydraulic closed-loop control unit through an oil pipeline, the oil port P of the fourth pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port A of the hydraulic closed-loop control unit through an oil pipeline, and the oil port A of the fourth pilot-operated high-frequency response flow self-adaptive control unit is communicated with the oil port T of the hydraulic closed-loop control unit through an oil pipeline.
The first pilot high-frequency response flow self-adaptive control unit comprises a first quick valve, a first restrictor and a first hydraulic control on-off valve, the second pilot high-frequency response flow self-adaptive control unit comprises a second quick valve, a second restrictor and a second hydraulic control on-off valve, the third pilot high-frequency response flow self-adaptive control unit comprises a third quick valve, a third restrictor and a third hydraulic control on-off valve, the fourth pilot high-frequency response flow self-adaptive control unit comprises a fourth quick valve, a fourth restrictor and a fourth hydraulic control on-off valve, the first quick valve, the second quick valve, the third quick valve and the fourth quick valve respectively comprise an oil port A and an oil port P, the first hydraulic control, the second hydraulic control, the third restrictor and the fourth hydraulic control on-off valve respectively comprise an oil port A and an oil port B, and the first hydraulic on-off valve, the second hydraulic control on-off valve, the third hydraulic control on-off valve and the fourth hydraulic control on-off valve respectively comprise an oil port A and an oil port B, The oil port A of the first quick valve and the oil port B of the first hydraulic control on-off valve are communicated with the oil port A of the first pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, the oil port P of the first quick valve and the oil port Y of the first hydraulic control on-off valve are communicated with the oil port B of the first restrictor through oil pipelines, the oil port A of the first restrictor and the oil port A of the first hydraulic control on-off valve are communicated with the oil port P of the first pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, the oil port X of the first hydraulic control on-off valve is also communicated with the oil port A of the first hydraulic control on-off valve through oil pipelines, the oil port A of the second quick valve and the oil port B of the second hydraulic control on-off valve are communicated with the oil port A of the second pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, and the oil port P of the second hydraulic control on-off valve and the oil port Y of the second hydraulic control on-off valve are communicated with the oil port B of the second restrictor through, an oil port A of the second restrictor and an oil port A of the second hydraulic on-off valve are communicated with an oil port P of the second pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, an oil port X of the second hydraulic on-off valve is also communicated with the oil port A of the second hydraulic on-off valve through an oil pipeline, an oil port A of the third quick valve and an oil port B of the third hydraulic on-off valve are both communicated with the oil port A of the third pilot-operated high-frequency response flow self-adaptive control unit through the oil pipeline, the oil port P of the third quick valve and the oil port Y of the third hydraulic on-off valve are both communicated with an oil port B of the third restrictor through the oil pipeline, the oil port A of the third restrictor and the oil port A of the third hydraulic on-off valve are both communicated with the oil port P of the third pilot-operated high-frequency response flow self-adaptive control unit through the oil pipeline, and the oil port X of the third hydraulic on-off valve is also communicated with the oil port A of the second hydraulic on, the oil port A of the fourth quick valve and the oil port B of the third hydraulic control on-off valve are communicated with the oil port A of the fourth pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, the oil port P of the third quick valve and the oil port Y of the third hydraulic control on-off valve are communicated with the oil port B of the third flow regulator through oil pipelines, the oil port A of the third flow regulator and the oil port A of the third hydraulic control on-off valve are communicated with the oil port P of the fourth pilot-operated high-frequency response flow self-adaptive control unit through oil pipelines, and the oil port X of the third hydraulic control on-off valve is further communicated with the oil port A of the second hydraulic control on-off valve through oil pipelines.
The hydraulic stopper comprises an actuator unit and a stopper rod, wherein one end of the stopper rod is communicated with an oil port A and an oil port B of the actuator unit through oil pipelines respectively, the displacement sensor is connected to the other end of the stopper rod, a second high-pressure rubber pipe is further connected to the oil pipeline of the oil port A of the actuator unit and the oil pipeline of the oil port A of the emergency closing unit, and a first high-pressure rubber pipe is further connected to the oil pipeline of the oil port B of the actuator unit and the oil pipeline of the oil port B of the emergency closing unit.
A low-power-consumption flow self-adaptive hydraulic position closed-loop control method comprises any one of the above-mentioned low-power-consumption flow self-adaptive hydraulic position closed-loop control systems, and comprises the following steps
S001: when the electromagnetic reversing valve works normally, the first electromagnetic reversing valve is electrified, so that the first hydraulic control one-way valve and the second hydraulic control one-way valve are opened, and the second electromagnetic reversing valve is powered off;
when the execution unit needs to realize a closing function, the first quick valve and the second quick valve are powered on, the third quick valve and the fourth quick valve are powered off, and the stopper rod hydraulic cylinder of the execution unit realizes the closing function;
when the execution unit needs to realize an opening function, the third quick valve and the fourth quick valve are electrified, the first quick valve and the second quick valve are powered off, and the stopper hydraulic cylinder of the execution unit realizes the opening function;
when the whole system needs to realize closed-loop control, the electric control system automatically controls the hydraulic closed-loop control unit in real time according to the position of the stopper rod hydraulic cylinder set by the electric control system and detects the numerical value of a displacement sensor on the execution unit, and realizes high-precision position control of the stopper rod hydraulic cylinder according to the closing and opening functions of the execution unit, so that the position value of the stopper rod hydraulic cylinder required by the process is ensured, meanwhile, when the numerical value of the displacement sensor is within the range value required by the process, the first quick valve, the second quick valve, the third quick valve and the fourth quick valve) and the first hydraulic control on-off valve, the second hydraulic control on-off valve, the third hydraulic control on-off valve and the fourth hydraulic control on-off valve are leakage-free stop hydraulic valves, the position of the stopper rod hydraulic cylinder is locked on the position values of the first quick valve, the second quick valve, the third quick valve and the fourth quick valve when the power is off, when the numerical value of the displacement sensor is larger than (or smaller than) the range value of the process requirement due to the internal leakage of the stopper rod hydraulic cylinder or other hydraulic elements after the system works for a long time, the closing (or opening) action is triggered again, the accurate and automatic control of the position of the stopper rod hydraulic cylinder is realized, and the function of reducing energy consumption is achieved;
s002: when the manual operation is carried out, the first electromagnetic directional valve is electrified, the second electromagnetic directional valve is electrified, the first quick valve is powered off, the second quick valve is powered off, the third quick valve is powered off, and the fourth quick valve is powered off, so that the oil ports of the upper cavity and the lower cavity of the stopper rod hydraulic cylinder in the execution unit are communicated, and the stopper rod hydraulic cylinder is depressurized at the moment, and therefore the position of the stopper rod hydraulic cylinder can be easily manually operated to control the liquid level height of the crystallizer;
s003: under the accident condition, the outage of first solenoid directional valve, the outage of second solenoid directional valve, the outage of first quick valve, the outage of second quick valve, the outage of third quick valve, the outage of fourth quick valve, the high-pressure oil of storing in the energy storage ware gets into hydraulic fluid port P through the hydraulic fluid port T of first high-pressure ball valve and gets into through first solenoid directional valve hydraulic fluid port A through second check valve, second rubber tube entering stopper stick pneumatic cylinder lower chamber, make the stopper stick pneumatic cylinder promptly close, thereby can not lead to the stopper stick pneumatic cylinder out of control, arouse great incident.
The invention has the beneficial effects that:
compared with the prior art, the invention uses the pressure reducing and energy storing filter unit, the emergency closing unit, the hydraulic closed-loop control unit and the actuator unit, and adopts four groups of pilot type high-frequency response flow self-adaptive control units with completely same structures and functions in the hydraulic closed-loop control unit to replace the prior servo valve (proportional valve) to control the position of the stopper rod hydraulic cylinder, thereby overcoming the defects of poor system anti-pollution capability, high failure rate, large power consumption, high price and the like caused by the traditional adoption of the servo valve (proportional valve); meanwhile, the speed stepless regulation of the stopper rod hydraulic cylinder at low speed and high speed can be realized by adopting the pilot type high-frequency response flow self-adaptive control unit, and the position of the stopper rod hydraulic cylinder can be accurately controlled.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the structure principle of the low-power consumption flow adaptive hydraulic position closed-loop control system.
Fig. 2 is a schematic diagram of the structural principle of the pressure reduction and energy storage filtering unit of the invention.
Fig. 3 is a schematic diagram of the structure of the emergency shutdown unit of the present invention.
Fig. 4 is a schematic diagram of the structural principle of the hydraulic closed-loop control unit of the invention.
In the figure: 101-first quick valve, 102-second quick valve, 103-third quick valve, 104-fourth quick valve, 201-first restrictor, 202-second restrictor, 203-third restrictor, 204-fourth restrictor, 301-first hydraulic control on-off valve, 302-second hydraulic control on-off valve, 303-third hydraulic control on-off valve, 304-fourth hydraulic control on-off valve, 401-first check valve, 402-second check valve, 403-third check valve, 501-first high-pressure ball valve, 502-second high-pressure ball valve, 601-first overflow valve, 602-second overflow valve, 701-first hydraulic control check valve, 702-second hydraulic control check valve, 801-first pressure sensor, 802-second pressure sensor, 901-first high-pressure rubber pipe, 902-a second high-pressure rubber pipe, 10-a three-way pressure reducing valve, 11-a filter, 12-an accumulator, 1301-a first electromagnetic directional valve, 1302-a second electromagnetic directional valve, 14-a stopper rod hydraulic cylinder, 15-a displacement sensor, 16-a pressure reducing and energy accumulating filter unit, 17-an emergency closing unit, 18-a hydraulic closed-loop control unit, 19-an actuator unit, 2001-a first pilot type high-frequency response flow self-adaptive control unit, 2002-a second pilot type high-frequency response flow self-adaptive control unit, 2003-a third pilot type high-frequency response flow self-adaptive control unit and 2004-a fourth pilot type high-frequency response flow self-adaptive control unit.
Detailed Description
Example 1:
referring to fig. 1, which is a schematic structural diagram of embodiment 1 of the present invention, a low power consumption flow adaptive hydraulic position closed-loop control system is characterized in that: the emergency closing device comprises a pressure reduction and energy storage filtering unit 16, an emergency closing unit 17, a hydraulic closed-loop control unit 18 and an actuator unit 19, wherein one end of the pressure reduction and energy storage filtering unit 16 is communicated with a hydraulic station through an oil pipeline, one ends of the emergency closing unit 17 and the hydraulic closed-loop control unit 18 are connected to the oil pipeline at the other end of the pressure reduction and energy storage filtering unit 16 in parallel, and the other ends of the emergency closing unit 17 and the hydraulic closed-loop control unit 18 are communicated with the actuator unit 19 through the oil pipeline.
The further pressure reduction energy storage filtering unit 16 is used for pressure reduction and filtering of hydraulic pressure oil and pressure oil supply of an energy storage device in the pressure reduction energy storage filtering unit 16 in an accident state, and meets the requirements of the use pressure of a hydraulic system, the oil cleanliness grade and accident oil source supply in the accident state of the hydraulic system; the emergency closing unit 17 is used for controlling the opening of an oil path by the hydraulic closed-loop control unit 18 during normal work, controlling the closing of the oil path by the hydraulic closed-loop control unit 18 and the quick emergency closing of the actuator unit 19 in an accident state, simultaneously realizing the manual operation function of the actuator unit 19, preventing serious safety production accidents such as equipment burnout, casualties and the like, realizing the stepless speed adjustment of the stopper rod hydraulic cylinder at low speed and high speed through the cooperation of the units, and accurately controlling the position of the stopper rod hydraulic cylinder.
Example 2:
the present embodiment is different from embodiment 1 in that: one end of the pressure-reducing and energy-storing filter unit 16 is provided with an oil inlet P1 and an oil return port T1, the other end of the pressure-reducing and energy-storing filter unit 16 is provided with an oil port P and an oil port T, one end of the emergency closing unit 17 is provided with the oil port P and the oil port T, the other end of the emergency closing unit 17 is provided with an oil port A, an oil port B, an oil port A1 and an oil port B1, one end of the hydraulic closed-loop control unit 18 is provided with the oil port P and the oil port T, the other end of the hydraulic closed-loop control unit 18 is provided with the oil port A and the oil port B, one end of the actuator unit 19 is provided with the oil port A and the oil port B, the hydraulic station is provided with a hydraulic station pressure oil port P 'and a hydraulic station oil return port T', the oil inlet P1 of the pressure-storing filter unit 16, an oil port P of the pressure reducing and energy storing filter unit 16 is respectively communicated with an oil port P of the emergency closing unit 17 and an oil port P of the hydraulic closed-loop control unit 18 through an oil pipeline, the oil port T of the pressure reducing and energy storing filter unit 16 is respectively communicated with the oil port T of the emergency closing unit 17 and the oil port T of the hydraulic closed-loop control unit 18 through an oil pipeline, the oil port A of the emergency closing unit 17 is communicated with an oil port A of the actuator unit 19 through an oil pipeline, the oil port B of the emergency closing unit 17 is communicated with an oil port B of the actuator unit 19 through an oil pipeline, the oil port A of the hydraulic closed-loop control unit 18 is communicated with an oil port A1 of the emergency closing unit 17 through an oil pipeline, and the oil port B of the hydraulic closed-loop control unit 18 is communicated with the.
Example 3:
referring to fig. 2, the present embodiment is different from embodiment 2 in that: the pressure reducing and energy storing filter unit 16 comprises a three-way pressure reducing valve 10, a filter 11, a one-way valve 401, a first ball valve 501, a second ball valve 502, an energy storage 12 and a first overflow valve 601, wherein one end of the three-way pressure reducing valve 10 is communicated with a hydraulic station pressure oil port P 'and a hydraulic station oil return port T' through an oil pipeline, the other end of the three-way pressure reducing valve 10 is communicated with one end of the filter 11 through an oil pipeline, the other end of the filter 11 is communicated with one end of the one-way valve 401 through an oil pipeline, the other end of the one-way valve 401 is communicated with one end of the first ball valve 501 through an oil pipeline, the other end of the first ball valve 501 is respectively communicated with one ends of the second ball valve 502 and the first overflow valve 601 through an oil pipeline, the energy storage 12 is connected to an oil pipeline through which the other end of the first ball valve 501 is communicated with the second ball valve 502 and the first, the oil line of the one-way valve 401 communicated with the first ball valve 501 is also communicated with an oil port P of the pressure reduction and energy storage filtering unit 16 through the oil line.
The pressure of the three-way reducing valve 10 is set according to the designed working pressure, so that the stopper rod mechanism can work reliably, and the stopper rod is prevented from being damaged due to overlarge emergency closing pressure, and safety accidents are avoided; the filter 11 is used for filtering high-pressure oil, so that the situation that equipment cannot normally work due to oil pollution of hydraulic components is prevented, and the reliability of the system is improved; the energy accumulator 12 is used for providing an emergency oil source for closing the stopper rod in an accident state of the hydraulic station, so that the system can still reliably close the stopper rod when the hydraulic station is powered off or a pipeline leaks, and accidents are prevented; when the first high-pressure ball valve 501 and the second high-pressure ball valve 502 are used for overhauling the system, the high-pressure oil in the accumulator 12 is closed and discharged; the first overflow valve 601 is used for setting the highest working pressure of the system to prevent accidents; the second relief valve 602 is used to limit the highest pressure in the lower chamber of the stopper rod to prevent damage to the stopper rod and safety hazards.
Example 4:
the present embodiment is different from embodiment 3 in that: the three-way pressure reducing valve 10 comprises an oil port P, an oil port T and an oil port A, the check valve 401 comprises the oil port A and an oil port B, the first ball valve 501, the second ball valve 502 and the first overflow valve 601 respectively comprise the oil port P and the oil port T, the oil port P of the three-way pressure reducing valve 10 is communicated with a pressure oil port P 'of a hydraulic station through an oil pipeline, the oil port T of the three-way pressure reducing valve 10 is communicated with an oil return port T' of the hydraulic station through an oil pipeline, the oil port A of the three-way pressure reducing valve 10 is communicated with one end of the filter 11 through an oil pipeline, the oil port A of the check valve 401 is communicated with the other end of the filter 11 through an oil pipeline, the oil port B of the check valve 401 is communicated with the oil port P of the first ball valve 501 through an oil pipeline, the oil port T of the first ball valve 501 is respectively communicated with the oil port P of the second ball valve, the oil port T of the second ball valve 502 and the oil port T of the first overflow valve 601 are communicated with the oil port T of the pressure reducing and energy storing filter unit 16 through an oil pipeline.
Example 5:
referring to fig. 3, the present embodiment is different from embodiment 2 in that: the emergency closing unit 17 comprises a first electromagnetic directional valve 1301, a second check valve 402, a third check valve 403, a second electromagnetic directional valve 1302, a second overflow valve 602, a first hydraulic control check valve 701, a second hydraulic control check valve 702, a first pressure sensor 801 and a second pressure sensor 802, one end of the first electromagnetic directional valve 1301 is communicated with an oil port P and an oil port T of the pressure reduction and energy storage filtering unit 16 through oil pipelines respectively, the other end of the first electromagnetic directional valve 1301 is communicated with one end of the second check valve 402 and one end of the third check valve 403 through oil pipelines respectively, the other end of the second check valve 402 is communicated with an oil port a of the emergency closing unit 17 and an oil port a1 of the emergency closing unit 17 through oil pipelines respectively, the first pressure sensor 801 is connected to an oil pipeline through which the other end of the second check valve 402 is communicated with the oil port a of the emergency closing unit 17, and the other end of the third check valve 403 is communicated with the second pressure sensor 802, the oil port a, An oil port B of the emergency closing unit 17 is communicated with an oil port B1 of the emergency closing unit 17, one end of a second electromagnetic directional valve 1302 and one end of a second overflow valve 602 are respectively connected with an oil pipeline communicated with the oil port A of the emergency closing unit 17 through oil pipelines, the other end of the second electromagnetic directional valve 1302 and the other end of the second overflow valve 602 are respectively connected with an oil pipeline communicated with the other end of a third check valve 403 and the second pressure sensor 802 through oil pipelines, the second electromagnetic directional valve 1302 and the second overflow valve 602 are further communicated through oil pipelines, a first hydraulic control check valve 701 is connected with an oil pipeline communicated with the oil port A1 of the emergency closing unit 17 at the other end of the second check valve 402, a second hydraulic control check valve 702 is connected with an oil pipeline communicated with the oil port B1 of the emergency closing unit 17 at the other end of the third check valve 403, and one end of the first hydraulic control check valve 701 and one end of the second hydraulic control check valve 702 are further respectively communicated with a pressure-reducing and energy-storing filter through oil An oil port T of the unit 16, an oil port T of the emergency closing unit 17 and an oil port T of the hydraulic closed-loop control unit 18 are communicated, and the other end of the first hydraulic control one-way valve 701 and the other end of the second hydraulic control one-way valve 702 are also communicated with an oil pipeline communicated with the other end of the first electromagnetic directional valve 1301 and one end of the third one-way valve 403 through oil pipelines.
The first pressure sensor 801 and the second pressure sensor 802 are further used for detecting the pressure of the upper cavity and the lower cavity of the stopper rod hydraulic cylinder, so that reliable control is realized, and the reliability of the system is improved; the second electromagnetic directional valve 1302 is used for communicating the upper and lower chambers of the stopper rod hydraulic cylinder 14, so that the stopper rod hydraulic cylinder 14 can be manually operated.
Example 6:
this embodiment is different from embodiment 5 in that: the first electromagnetic directional valve 1301 and the second electromagnetic directional valve 1302 respectively comprise an oil port P, an oil port T, an oil port A and an oil port B, the second check valve 402 and the third check valve 403 respectively comprise an oil port A and an oil port B, the second overflow valve 602 comprises an oil port P and an oil port T, the first hydraulic control check valve 701 and the second hydraulic control check valve 702 respectively comprise an oil port A, an oil port B, an oil port X and an oil port Y, the oil port P of the first electromagnetic directional valve 1301 is communicated with the oil port P of the emergency closing unit 17 through an oil pipeline, the oil port T of the first electromagnetic directional valve 1301 is communicated with the oil port T of the emergency closing unit 17 through an oil pipeline, the oil port A of the first electromagnetic directional valve 1301 is communicated with the oil port A of the second check valve 402 through an oil pipeline, the oil port B of the first electromagnetic directional valve 1301 is communicated with the oil port B of the third check valve 403 through an oil pipeline, the oil port B of the second check valve 402 is respectively communicated with the oil port A of the emergency closing unit 17 and the oil port B of the first hydraulic, an oil port A of the first hydraulic control one-way valve 701 is communicated with an oil port A1 of the emergency closing unit 17 through an oil pipeline, an oil port A of the third one-way valve 403 is respectively communicated with the second pressure sensor 802, an oil port B of the emergency closing unit 17 and an oil port B of the second hydraulic control one-way valve 702 through oil pipelines, an oil port A of the second hydraulic control one-way valve 702 is communicated with a B1 of the emergency closing unit 17 through an oil pipeline, an oil port X of the first hydraulic control one-way valve 701 and an oil port X of the second hydraulic control one-way valve 702 are respectively communicated with the oil pipelines communicated with the other end of the first electromagnetic reversing valve 1301 and one end of the third one-way valve 403 through pipelines, an oil port Y of the first hydraulic control one-way valve 701 and an oil port Y of the second hydraulic control one-way valve 702 are respectively communicated with an oil port T of the pressure reducing and energy storing filter unit 16, an oil port T of the emergency closing unit 17 and an oil port T of the hydraulic closed-loop control unit 18 through oil pipelines, an oil An oil port T of the second electromagnetic directional valve 1302 and an oil port T of the second overflow valve 602 are respectively communicated with the other end of the oil port A of the third check valve 403, the second pressure sensor 802 and an oil port B of the emergency closing unit 17 through pipelines, the oil port A of the second electromagnetic directional valve 1302 and an oil port P of the second overflow valve 602 are communicated through pipelines, and the oil port B of the second electromagnetic directional valve 1302 and the oil port T of the second overflow valve 602 are communicated through pipelines.
Example 7:
referring to fig. 4, the present embodiment is different from embodiment 2 in that: the hydraulic closed-loop control unit 18 includes a first pilot type high frequency response flow adaptive control unit 2001, a second pilot type high frequency response flow adaptive control unit 2002, a third pilot type high frequency response flow adaptive control unit 2003 and a fourth pilot type high frequency response flow adaptive control unit 2004, which have the same function, the first pilot type high frequency response flow adaptive control unit 2001, the second pilot type high frequency response flow adaptive control unit 2002, the third pilot type high frequency response flow adaptive control unit 2003 and the fourth pilot type high frequency response flow adaptive control unit 2004 all include an oil port a and an oil port P, the oil port a of the first pilot type high frequency response flow adaptive control unit 2001 is communicated with the oil port a of the hydraulic closed-loop control unit 18 through an oil pipeline, the oil port P of the first pilot type high frequency response flow adaptive control unit 2001 is communicated with the oil port P of the hydraulic closed-loop control unit 18 through an oil pipeline, the oil port P of the second pilot-operated high-frequency response flow self-adaptive control unit 2002 is communicated with the oil port B of the hydraulic closed-loop control unit 18 through an oil pipeline, the oil port a of the second pilot-operated high-frequency response flow self-adaptive control unit 2002 is communicated with the oil port T of the hydraulic closed-loop control unit 18 through an oil pipeline, an oil port A of the third pilot-operated high-frequency response flow self-adaptive control unit 2003 is communicated with an oil port B of the hydraulic closed-loop control unit 18 through an oil pipeline, an oil port P of the third pilot-operated high-frequency response flow self-adaptive control unit 2003 is communicated with an oil port P of the hydraulic closed-loop control unit 18 through an oil pipeline, an oil port P of the fourth pilot-operated high-frequency response flow self-adaptive control unit 2004 is communicated with an oil port a of the hydraulic closed-loop control unit 18 through an oil pipeline, and the oil port a of the fourth pilot-operated high-frequency response flow self-adaptive control unit 2004 is communicated with an oil port T of the hydraulic closed-loop control unit 18 through an oil pipeline.
Further, by respectively adjusting the duty ratios (PWM) of the first pilot-type high-frequency response flow adaptive control unit 2001, the second pilot-type high-frequency response flow adaptive control unit 2002, the third pilot-type high-frequency response flow adaptive control unit 2003 and the fourth pilot-type high-frequency response flow adaptive control unit 2004, the hydraulic closed-loop control unit 18 can realize adaptive control of the flow, and the stopper rod hydraulic cylinder 14 can realize a slow-fast stepless speed regulation function under the electrical automatic control.
Example 8:
this embodiment is different from embodiment 7 in that: the first pilot-operated high-frequency response flow adaptive control unit 2001 comprises a first quick valve 101, a first restrictor 201 and a first hydraulic on-off valve 301, the second pilot-operated high-frequency response flow adaptive control unit 2002 comprises a second quick valve 102, a second restrictor 202 and a second hydraulic on-off valve 302, the third pilot-operated high-frequency response flow adaptive control unit 2003 comprises a third quick valve 103, a third restrictor 203 and a third hydraulic on-off valve 303, the fourth pilot-operated high-frequency response flow adaptive control unit 2004 comprises a fourth quick valve 104, a fourth restrictor 204 and a fourth hydraulic on-off valve 304, the first quick valve 101, the second quick valve 102, the third quick valve 103 and the fourth quick valve 104 respectively comprise an oil port A and an oil port P, the first restrictor 201, the second restrictor 202, the third restrictor 203 and the fourth restrictor 204 respectively comprise an oil port A and an oil port B, the first on-off valve 301, the first restrictor 201, the second restrictor 201 and the first hydraulic on-off valve 301, The second hydraulic on-off valve 302, the third hydraulic on-off valve 303 and the fourth hydraulic on-off valve 304 respectively comprise an oil port a, an oil port B, an oil port X and an oil port Y, the oil port a of the first fast valve 101 and the oil port B of the first hydraulic on-off valve 301 are respectively communicated with the oil port a of the first pilot-operated high-frequency response flow adaptive control unit 2001 through oil pipelines, the oil port P of the first fast valve 101 and the oil port Y of the first hydraulic on-off valve 301 are respectively communicated with the oil port B of the first restrictor 201 through oil pipelines, the oil port a of the first restrictor 201 and the oil port a of the first hydraulic on-off valve 301 are respectively communicated with the oil port P of the first pilot-operated high-frequency response flow adaptive control unit 2001 through oil pipelines, the oil port X of the first hydraulic on-off valve 301 is also communicated with the oil port a of the first hydraulic on-off valve 301 through oil pipelines, the oil port a of the second fast valve 102 and the oil port B of the second hydraulic on-off valve 302 are respectively communicated with the oil port a of the second pilot-operated high-frequency response flow adaptive control The oil port P of the second fast valve 102 and the oil port Y of the second hydraulic on-off valve 302 are both communicated with the oil port B of the second restrictor 202 through oil pipelines, the oil port a of the second restrictor 202 and the oil port a of the second hydraulic on-off valve 302 are both communicated with the oil port P of the second pilot-operated high-frequency response flow adaptive control unit 2002 through oil pipelines, the oil port X of the second hydraulic on-off valve 302 is also communicated with the oil port a of the second hydraulic on-off valve 302 through oil pipelines, the oil port a of the third fast valve 103 and the oil port B of the third hydraulic on-off valve 303 are both communicated with the oil port a of the third pilot-operated high-frequency response flow adaptive control unit 2003 through oil pipelines, the oil port P of the third fast valve 103 and the oil port Y of the third hydraulic on-off valve 303 are both communicated with the oil port B of the third restrictor 203 through oil pipelines, the oil port a of the third flow adaptive valve 203 and the oil port a of the third on-off valve 303 are both communicated with the oil port P of the third pilot-operated high-frequency response flow adaptive control unit 2003 through oil pipelines, the oil port X of the third hydraulic on-off valve 303 is further communicated with the oil port a of the second hydraulic on-off valve 303 through an oil line, the oil port a of the fourth fast valve 104 and the oil port B of the third hydraulic on-off valve 304 are both communicated with the oil port a of the fourth pilot-operated high-frequency response flow adaptive control unit 2004 through oil lines, the oil port P of the third fast valve 104 and the oil port Y of the third hydraulic on-off valve 304 are both communicated with the oil port B of the third flow controller 204 through oil lines, the oil port a of the third flow controller 204 and the oil port a of the third hydraulic on-off valve 304 are both communicated with the oil port P of the fourth pilot-operated high-frequency response flow adaptive control unit 2004 through oil lines, and the oil port X of the third hydraulic on-off valve 304 is further communicated with the oil port a of the second hydraulic on-off valve 304 through oil lines.
The stopper rod hydraulic cylinder 14 of the further execution unit 19 can realize the function of stepless speed regulation, and the principle is that the function of stepless speed regulation is realized by regulating the duty ratios (PWM) of the first fast valve 101, the second fast valve 102, the third fast valve 103 and the fourth fast valve 104, and the duty ratio of the first fast valve 101 is regulated to be continuously increased (reduced), so that the oil flow passing through the first fast valve 101 is continuously increased (reduced), and the pressure drop passing through the first throttler 201 is continuously increased (reduced), so that the pressure difference acting on the oil port X side and the oil port Y side of the first hydraulic on-off valve 301 is changed, and the spring on the oil port Y side of the first hydraulic on-off valve 301 is overcome to enable the first hydraulic on-off valve 301 and the duty ratio (PWM) of the first fast valve 101 to be proportionally opened (closed), and the flow self-adaptive regulation of the first pilot type high frequency response flow adaptive control unit 2001 is realized by the actions, therefore, by respectively adjusting the duty ratios (PWM) of the first pilot-type high-frequency response flow adaptive control unit 2001, the second pilot-type high-frequency response flow adaptive control unit 2002, the third pilot-type high-frequency response flow adaptive control unit 2003 and the fourth pilot-type high-frequency response flow adaptive control unit 2004, the hydraulic closed-loop control unit 18 can realize adaptive control of the flow, and the stopper rod hydraulic cylinder 14 can realize a slow-fast stepless speed regulation function under electrical automatic control.
Example 9:
the present embodiment is different from embodiment 2 in that: the actuator unit 19 comprises a stopper rod hydraulic cylinder 14 and a displacement sensor 15, one end of the stopper rod hydraulic cylinder 14 is respectively communicated with an oil port A and an oil port B of the actuator unit 19 through oil pipelines, the displacement sensor 15 is connected to the other end of the stopper rod hydraulic cylinder 14, a second high-pressure rubber pipe 902 is further connected to an oil pipeline through which the oil port A of the actuator unit 19 is communicated with the oil port A of the emergency closing unit 17, and a first high-pressure rubber pipe 901 is further connected to an oil pipeline through which the oil port B of the actuator unit 19 is communicated with the oil port B of the emergency closing unit 17.
A further displacement sensor 15 is used to collect and transmit position information of the stopper rod cylinder 14.
Example 10:
a low-power-consumption flow self-adaptive hydraulic position closed-loop control method comprises any one of embodiments 1 to 9, and comprises the following steps
S001: during normal operation, the first electromagnetic directional valve 1301 is powered on, so that the first hydraulic control one-way valve 701 and the second hydraulic control one-way valve 702 are opened, and the second electromagnetic directional valve 1302 is powered off;
when the execution unit 19 needs to realize a closing function, the first quick valve 101 and the second quick valve 102 are powered on, the third quick valve 103 and the fourth quick valve 104 are powered off, and the stopper rod hydraulic cylinder 14 of the execution unit 19 realizes the closing function;
when the execution unit 19 needs to realize an opening function, the third quick valve 103 and the fourth quick valve 104 are powered on, the first quick valve 101 and the second quick valve 102 are powered off, and the stopper rod hydraulic cylinder 14 of the execution unit 19 realizes the opening function;
when the whole system needs to realize closed-loop control, the electric control system automatically controls the hydraulic closed-loop control unit 18 in real time according to the position of the stopper rod hydraulic cylinder 14 set by the electric control system and detects the value of the displacement sensor 15 on the execution unit 19, and realizes high-precision position control of the stopper rod hydraulic cylinder 14 according to the closing and opening functions of the execution unit 19, so as to ensure the position value of the stopper rod hydraulic cylinder 14 required by the process, meanwhile, when the value of the displacement sensor 15 is within the range value required by the process, the first quick valve 101, the second quick valve 102, the third quick valve 103, the fourth quick valve 104, the first on-off valve 301, the second on-off valve 302, the third on-off valve 303, and the fourth on-off valve 304 are leakage-free stop hydraulic valves, the position of the stopper rod hydraulic cylinder 14 is locked on the position values of the first quick valve 101, the second quick valve 102, the third quick valve 103, and the fourth quick valve 104 when power is off, when the numerical value of the displacement sensor 15 is larger than (or smaller than) the range value of the process requirement due to the internal leakage of the stopper rod hydraulic cylinder 14 or other hydraulic elements after the system works for a long time, the closing (or opening) action is triggered again, the accurate and automatic control of the position of the stopper rod hydraulic cylinder 14 is realized, and the function of reducing energy consumption is achieved;
s002: when the manual operation is performed, the first electromagnetic directional valve 1301 is powered on, the second electromagnetic directional valve 1302 is powered on, the first quick valve 101 is powered off, the second quick valve 102 is powered off, the third quick valve 103 is powered off, and the fourth quick valve 104 is powered off, so that oil ports of the upper cavity and the lower cavity of the plunger hydraulic cylinder 14 in the execution unit 19 are communicated, and the plunger hydraulic cylinder 14 is depressurized at the moment, so that the position of the plunger hydraulic cylinder 14 can be easily manually operated to control the liquid level of the crystallizer;
s003: in an accident state, the first electromagnetic directional valve 1301 is powered off, the second electromagnetic directional valve 1302 is powered off, the first quick valve 101 is powered off, the second quick valve 102 is powered off, the third quick valve 103 is powered off, the fourth quick valve 104 is powered off, high-pressure oil stored in the energy accumulator 12 enters the oil port P through the oil port T of the first high-pressure ball valve 501 and enters the lower cavity of the stopper rod hydraulic cylinder 14 through the oil port A of the first electromagnetic directional valve 1301, the second check valve 402 and the second rubber pipe 902, so that the stopper rod hydraulic cylinder 14 is closed emergently, the stopper rod hydraulic cylinder 14 cannot be out of control, and major safety accidents are caused.
Further, the stopper rod hydraulic cylinder 14 of the execution unit 19 can realize a speed stepless adjustment function, the principle of which is realized by adjusting duty ratios (PWM) of the first quick valve 101, the second quick valve 102, the third quick valve 103 and the fourth quick valve 104; here, the first pilot type high frequency response adaptive control unit 2001 is explained as follows: hydraulic high-pressure oil enters a first restrictor 201, an oil port A, a first quick valve 101, an oil port B and a first pilot type high-frequency response flow self-adaptive control unit 2001, through an oil port P of the first pilot type high-frequency response flow self-adaptive control unit 2001; when the duty ratio of the first quick valve 101 is adjusted to be increased, the flow rate of the high-pressure oil passing through the first quick valve 101 is increased, so that the pressure drop across the first restrictor 201 is increased, which results in the pressure acting on the port Y side of the first pilot-operated on-off valve 301 being decreased, thereby increasing the pressure difference acting on the oil port X and the oil port Y of the first hydraulic on-off valve 301 and overcoming the spring on the oil port Y side of the first hydraulic on-off valve 301 to move the spool of the first hydraulic on-off valve 301 to the oil port Y side, the hydraulic high-pressure oil enters the oil port a of the first hydraulic on-off valve 301 through the oil port P of the first pilot-operated high-frequency response flow self-adaptive control unit 2001 and then enters the oil port a of the first pilot-operated high-frequency response flow self-adaptive control unit 2001 through the oil port B to be continuously increased, it is thereby achieved that the flow rate of the high-pressure oil passing through the first pilot-operated on-off valve 301 is increased in proportion to the duty ratio of the first quick valve 101. On the contrary, when the duty ratio of the first fast valve 101 is adjusted to be continuously decreased, the flow rate of the high-pressure oil passing through the first fast valve 101 is continuously decreased, so that the pressure drop through the first restrictor 201 is continuously decreased, which results in the pressure acting on the port Y side of the first pilot-operated on-off valve 301 being increased, thereby the spring at the side of the oil port Y of the first hydraulic on-off valve 301 overcomes the pressure difference acting on the oil port X and the oil port Y of the first hydraulic on-off valve 301 and moves the spool of the first hydraulic on-off valve 301 to the side of the oil port X, and the hydraulic high-pressure oil enters the first hydraulic on-off valve 301 oil port a through the first pilot type high-frequency response flow self-adaptive control unit 2001 oil port a through the oil port B after entering the first pilot type high-frequency response flow self-adaptive control unit 2001 oil port a and is continuously reduced, it is thereby achieved that the flow rate of the high-pressure oil passing through the first pilot-operated on-off valve 301 is increased in proportion to the duty ratio of the first quick valve 101. In summary, the adaptive control operation described above causes the first pilot on/off valve 301 to open or close in proportion to the duty ratio (PWM) of the first quick valve 101, thereby realizing adaptive control of the flow rate in the first pilot-operated high-frequency-responsive-flow-rate adaptive control unit 2001, and the actions of the 2002-second pilot-operated high-frequency-responsive-flow-rate adaptive control unit, the 2003-third pilot-operated high-frequency-responsive-flow-rate adaptive control unit, and the 2004-fourth pilot-operated high-frequency-responsive-flow-rate adaptive control unit are the same as those of the first pilot-operated high-frequency-responsive-flow-rate adaptive control unit 2001
Hydraulic high-pressure oil enters a first restrictor 201, an oil port A, a first quick valve 101, an oil port B and a first pilot type high-frequency response flow self-adaptive control unit 2001, through an oil port P of the first pilot type high-frequency response flow self-adaptive control unit 2001; when the duty ratio of the first quick valve 101 is adjusted to be increased, the flow rate of the high-pressure oil passing through the first quick valve 101 is increased, so that the pressure drop across the first restrictor 201 is increased, which results in the pressure acting on the port Y side of the first pilot-operated on-off valve 301 being decreased, thereby increasing the pressure difference acting on the oil port X and the oil port Y of the first hydraulic on-off valve 301 and overcoming the spring on the oil port Y side of the first hydraulic on-off valve 301 to move the spool of the first hydraulic on-off valve 301 to the oil port Y side, the hydraulic high-pressure oil enters the oil port a of the first hydraulic on-off valve 301 through the oil port P of the first pilot-operated high-frequency response flow self-adaptive control unit 2001 and then enters the oil port a of the first pilot-operated high-frequency response flow self-adaptive control unit 2001 through the oil port B to be continuously increased, it is thereby achieved that the flow rate of the high-pressure oil passing through the first pilot-operated on-off valve 301 is increased in proportion to the duty ratio of the first quick valve 101. On the contrary, when the duty ratio of the first fast valve 101 is adjusted to be continuously decreased, the flow rate of the high-pressure oil passing through the first fast valve 101 is continuously decreased, so that the pressure drop through the first restrictor 201 is continuously decreased, which results in the pressure acting on the port Y side of the first pilot-operated on-off valve 301 being increased, thereby the spring at the side of the oil port Y of the first hydraulic on-off valve 301 overcomes the pressure difference acting on the oil port X and the oil port Y of the first hydraulic on-off valve 301 and moves the spool of the first hydraulic on-off valve 301 to the side of the oil port X, and the hydraulic high-pressure oil enters the first hydraulic on-off valve 301 oil port a through the first pilot type high-frequency response flow self-adaptive control unit 2001 oil port a through the oil port B after entering the first pilot type high-frequency response flow self-adaptive control unit 2001 oil port a and is continuously reduced, it is thereby achieved that the flow rate of the high-pressure oil passing through the first pilot-operated on-off valve 301 is increased in proportion to the duty ratio of the first quick valve 101. In summary, since the adaptive control operation described above causes the first pilot-operated on/off valve 301 to open or close in proportion to the duty ratio (PWM) of the first fast valve 101, thereby realizing adaptive control of the flow rate in the first pilot-operated high-frequency-responsive-flow-rate adaptive control unit 2001, and 2002-second, third, and 2004-fourth pilot-operated high-frequency-responsive-flow-rate adaptive control units act in the same manner as the first pilot-operated high-frequency-responsive-flow-rate adaptive control unit 2001, the hydraulic closed-loop control unit 18 can realize adaptive control of the flow rate by adjusting the duty ratios (PWM) of the first, second, third, and fourth pilot-operated high-frequency-responsive-flow-rate adaptive control units 2001, 2002, 2003, and 2004, respectively, the stopper rod hydraulic cylinder 14 can realize the function of slow-fast stepless speed regulation under the electric automatic control.
The position of the stopper rod hydraulic cylinder is controlled by adopting four groups of pilot-operated high-frequency response flow self-adaptive control units with completely same structures and functions to replace a servo valve (proportional valve), so that the defects of poor system anti-pollution capacity, high failure rate, large power consumption, high price and the like caused by the traditional adoption of the servo valve (proportional valve) are overcome; meanwhile, the speed stepless regulation of the stopper rod hydraulic cylinder at low speed and high speed can be realized by adopting the pilot type high-frequency response flow self-adaptive control unit, and the position of the stopper rod hydraulic cylinder can be accurately controlled.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Claims (10)

1. A low-power consumption flow self-adaptation hydraulic pressure position closed-loop control system, characterized by: the emergency closing device comprises a pressure reduction and energy storage filtering unit (16), an emergency closing unit (17), a hydraulic closed-loop control unit (18) and an actuator unit (19), wherein one end of the pressure reduction and energy storage filtering unit (16) is communicated with a hydraulic station through an oil pipeline, one ends of the emergency closing unit (17) and the hydraulic closed-loop control unit (18) are connected to the oil pipeline at the other end of the pressure reduction and energy storage filtering unit (16) in parallel, and the other ends of the emergency closing unit (17) and the hydraulic closed-loop control unit (18) are communicated with the actuator unit (19) through the oil pipeline.
2. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 1, characterized in that: one end of the pressure-reducing and energy-storing filtering unit (16) is provided with an oil inlet P1 and an oil return port T1, the other end of the pressure-reducing and energy-storing filtering unit (16) is provided with an oil port P and an oil port T, one end of the emergency closing unit (17) is provided with the oil port P and the oil port T, the other end of the emergency closing unit (17) is provided with an oil port A, an oil port B, an oil port A1 and an oil port B1, one end of the hydraulic closed-loop control unit (18) is provided with the oil port P and the oil port T, the other end of the hydraulic closed-loop control unit (18) is provided with the oil port A and the oil port B, the hydraulic station is provided with a hydraulic station pressure oil port P ' and a hydraulic station oil return port T ', the oil inlet P1 of the pressure-reducing and energy-storing filtering unit (16) is communicated with the hydraulic station pressure oil port P ' through an oil pipeline, and the oil return, an oil port P of the pressure reducing and energy storing filter unit (16) is respectively communicated with an oil port P of the emergency closing unit (17) and an oil port P of the hydraulic closed-loop control unit (18) through an oil pipeline, an oil port T of the pressure reducing and energy storing filter unit (16) is respectively communicated with the oil port T of the emergency closing unit (17) and the oil port T of the hydraulic closed-loop control unit (18) through the oil pipeline, an oil port A of the emergency closing unit (17) is communicated with an oil port A of the actuator unit (19) through an oil pipeline, an oil port B of the emergency closing unit (17) is communicated with an oil port B of the actuator unit (19) through an oil pipeline, an oil port A of the hydraulic closed-loop control unit (18) is communicated with an oil port A1 of the emergency closing unit (17) through an oil pipeline, and an oil port B of the hydraulic closed-loop control unit (18) is communicated with an oil port B1 of the emergency closing unit (17) through an oil pipeline.
3. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 2, characterized in that: the pressure reduction and energy storage filtering unit (16) comprises a three-way pressure reducing valve (10), a filter (11), a one-way valve (401), a first ball valve (501), a second ball valve (502), an energy accumulator (12) and a first overflow valve (601), one end of the three-way pressure reducing valve (10) is communicated with a pressure oil port P 'of a hydraulic station and an oil return port T' of the hydraulic station through an oil pipeline, the other end of the three-way pressure reducing valve (10) is communicated with one end of the filter (11) through the oil pipeline, the other end of the filter (11) is communicated with one end of the one-way valve (401) through the oil pipeline, the other end of the one-way valve (401) is communicated with one end of the first ball valve (501) through the oil pipeline, the other end of the first ball valve (501) is communicated with one end of the second ball valve (502) and one end of the first overflow valve (601) through the oil pipeline, the energy accumulator (12) is connected to the, the other ends of the second ball valve (502) and the first overflow valve (601) are communicated with an oil port T of the pressure reducing and energy storing filter unit (16) through an oil pipeline, and an oil pipeline of the one-way valve (401) communicated with the first ball valve (501) is also communicated with an oil port P of the pressure reducing and energy storing filter unit (16) through an oil pipeline.
4. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 3, characterized in that: the three-way pressure reducing valve (10) comprises an oil port P, an oil port T and an oil port A, the one-way valve (401) comprises the oil port A and an oil port B, the first ball valve (501), the second ball valve (502) and the first overflow valve (601) respectively comprise the oil port P and the oil port T, the oil port P of the three-way pressure reducing valve (10) is communicated with a pressure oil port P 'of a hydraulic station through an oil pipeline, the oil port T of the three-way pressure reducing valve (10) is communicated with an oil return port T' of the hydraulic station through an oil pipeline, the oil port A of the three-way pressure reducing valve (10) is communicated with one end of the filter (11) through an oil pipeline, the oil port A of the one-way valve (401) is communicated with the other end of the filter (11) through an oil pipeline, the oil port B of the one-way valve (401) is communicated with the oil port P of the first ball valve (501) through an oil pipeline, the oil port T of, the energy accumulator (12) is connected to an oil pipeline at an oil port T of the first ball valve (501), and the oil port T of the second ball valve (502) and the oil port T of the first overflow valve (601) are communicated with the oil port T of the pressure reduction and energy accumulation filtering unit (16) through the oil pipeline.
5. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 2, characterized in that: the emergency closing unit (17) comprises a first electromagnetic directional valve (1301), a second one-way valve (402), a third one-way valve (403), a second electromagnetic directional valve (1302), a second overflow valve (602), a first hydraulic control one-way valve (701), a second hydraulic control one-way valve (702), a first pressure sensor (801) and a second pressure sensor (802), one end of the first electromagnetic directional valve (1301) is communicated with an oil port P and an oil port T of the pressure reduction and energy storage filtering unit (16) through oil pipelines respectively, the other end of the first electromagnetic directional valve (1301) is communicated with one end of the second one-way valve (402) and one end of the third one-way valve (801) through oil pipelines respectively, the other end of the second one-way valve (402) is communicated with the oil port A of the emergency closing unit (17) and the oil port A1 of the emergency closing unit (17) through oil pipelines respectively, and the first pressure sensor (801) is connected with the other end of the second one-way valve (402) and the oil port A of the emergency closing unit (17) On an oil pipeline, the other end of the third one-way valve (403) is respectively communicated with the second pressure sensor (802), the oil port B of the emergency closing unit (17) and the oil port B1 of the emergency closing unit (17) through oil pipelines, one end of the second electromagnetic directional valve (1302) and one end of the second overflow valve (602) are respectively connected on the oil pipeline through which the second pressure sensor (802) is communicated with the oil port A of the emergency closing unit (17), the other end of the second electromagnetic directional valve (1302) and the other end of the second overflow valve (602) are respectively connected on the oil pipeline through which the other end of the third one-way valve (403) is communicated with the second pressure sensor (802), the second electromagnetic directional valve (1302) is also communicated with the second overflow valve (602) through oil pipelines, the first hydraulic control one-way valve (701) is connected on the oil pipeline through which the other end of the second one-way valve (402) is communicated with the oil port A1 of the emergency closing unit (17), the second hydraulic control one-way valve (702) is connected to an oil pipeline, the other end of the third one-way valve (403) is communicated with an oil port B1 of the emergency closing unit (17), one end of the first hydraulic control one-way valve (701) and one end of the second hydraulic control one-way valve (702) are respectively communicated with an oil port T of the pressure reduction energy storage filtering unit (16), an oil port T of the emergency closing unit (17) and an oil port T of the hydraulic closed-loop control unit (18) through oil pipelines, and the other end of the first hydraulic control one-way valve (701) and the other end of the second hydraulic control one-way valve (702) are communicated with oil pipelines, which are communicated with the other end of the first electromagnetic directional valve (1301) and one end of the third one-way valve (403), through.
6. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 5, characterized in that: the first electromagnetic directional valve (1301) and the second electromagnetic directional valve (1302) respectively comprise an oil port P, an oil port T, an oil port A and an oil port B, the second check valve (402) and the third check valve (403) respectively comprise an oil port A and an oil port B, the second overflow valve (602) comprises an oil port P and an oil port T, the first hydraulic control check valve (701) and the second hydraulic control check valve (702) respectively comprise an oil port A, an oil port B, an oil port X and an oil port Y, the oil port P of the first electromagnetic directional valve (1301) is communicated with the oil port P of the emergency closing unit (17) through an oil pipeline, the oil port T of the first electromagnetic directional valve (1301) is communicated with the oil port T of the emergency closing unit (17) through an oil pipeline, the oil port A of the first electromagnetic directional valve (1301) is communicated with the oil port A of the second check valve (402) through an oil pipeline, the oil port B of the first electromagnetic directional valve (1301) is communicated with the oil port B of the third check valve (403) through an oil pipeline, an oil port B of the second check valve (402) is respectively communicated with an oil port A of the emergency closing unit (17) and an oil port B of the first hydraulic control check valve (701) through oil pipelines, the oil port A of the first hydraulic control check valve (701) is respectively communicated with the oil port A1 of the emergency closing unit (17) through oil pipelines, the oil port A of the third check valve (403) is respectively communicated with an oil port B of the second pressure sensor (802), the emergency closing unit (17) and an oil port B of the second hydraulic control check valve (702) through oil pipelines, the oil port A of the second hydraulic control check valve (702) is communicated with a B1 of the emergency closing unit (17) through oil pipelines, the oil port X of the first hydraulic control check valve (701) and the oil port X of the second hydraulic control check valve (702) are respectively communicated with the oil pipelines communicated with the other end of the first electromagnetic directional valve (1301) and one end of the third check valve (403) through oil pipelines, the oil port Y of the first hydraulic control check valve (701) and the oil port Y of the second hydraulic control check valve (702) are respectively communicated with An oil port T of the energy storage filtering unit (16), an oil port T of the emergency closing unit (17) and an oil port T of the hydraulic closed-loop control unit (18) are communicated, an oil port P of the second electromagnetic directional valve (1302) and an oil port P of the second overflow valve (602) are respectively communicated with an oil pipeline communicated with an oil port A of the second pressure sensor (802) and the emergency closing unit (17) through pipelines, the oil port T of the second electromagnetic directional valve (1302) and the oil port T of the second overflow valve (602) are respectively communicated with the other end of the oil port A of the third one-way valve (403) and oil pipelines communicated with the oil port B of the second pressure sensor (802) and the emergency closing unit (17) through pipelines, an oil port A of the second electromagnetic directional valve (1302) is communicated with an oil port P of the second overflow valve (602) through a pipeline, and an oil port B of the second electromagnetic directional valve (1302) is communicated with an oil port T of the second overflow valve (602) through a pipeline.
7. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 2, characterized in that: the hydraulic closed-loop control unit (18) comprises a first pilot type high-frequency response flow self-adaptive control unit (2001), a second pilot type high-frequency response flow self-adaptive control unit (2002), a third pilot type high-frequency response flow self-adaptive control unit (2003) and a fourth pilot type high-frequency response flow self-adaptive control unit (2004) which have the same functions, wherein the first pilot type high-frequency response flow self-adaptive control unit (2001), the second pilot type high-frequency response flow self-adaptive control unit (2002), the third pilot type high-frequency response flow self-adaptive control unit (2003) and the fourth pilot type high-frequency response flow self-adaptive control unit (2004) respectively comprise an oil port A and an oil port P, the oil port A of the first pilot type high-frequency response flow self-adaptive control unit (2001) is communicated with the oil port A of the hydraulic closed-loop control unit (18) through an oil pipeline, and the oil port P of the first pilot type high-frequency response flow self-adaptive control unit (2001) is communicated with the oil port A of the hydraulic closed-loop control unit (18 An oil port P of the control unit (18) is communicated, an oil port P of the second pilot-operated high-frequency response flow self-adaptive control unit (2002) is communicated with an oil port B of the hydraulic closed-loop control unit (18) through an oil pipeline, an oil port A of the second pilot-operated high-frequency response flow self-adaptive control unit (2002) is communicated with an oil port T of the hydraulic closed-loop control unit (18) through an oil pipeline, an oil port A of the third pilot-operated high-frequency response flow self-adaptive control unit (2003) is communicated with the oil port B of the hydraulic closed-loop control unit (18) through an oil pipeline, an oil port P of the third pilot-operated high-frequency response flow self-adaptive control unit (2003) is communicated with the oil port P of the hydraulic closed-loop control unit (18) through an oil pipeline, an oil port P of the fourth pilot-operated high-frequency response flow self-adaptive control unit (2004) is communicated with the oil port A of the hydraulic closed-loop control unit, an oil port A of the fourth pilot type high-frequency response flow self-adaptive control unit (2004) is communicated with an oil port T of the hydraulic closed-loop control unit (18) through an oil pipeline.
8. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 7, characterized in that: the first pilot type high-frequency response flow self-adaptive control unit (2001) comprises a first quick valve (101), a first restrictor (201) and a first hydraulic control on-off valve (301), the second pilot type high-frequency response flow self-adaptive control unit (2002) comprises a second quick valve (102), a second restrictor (202) and a second hydraulic control on-off valve (302), the third pilot type high-frequency response flow self-adaptive control unit (2003) comprises a third quick valve (103), a third restrictor (203) and a third hydraulic control on-off valve (303), the fourth pilot type high-frequency response flow self-adaptive control unit (2004) comprises a fourth quick valve (104), a fourth restrictor (204) and a fourth hydraulic control on-off valve (304), the first quick valve (101), the second quick valve (102), the third quick valve (103) and the fourth quick valve (104) respectively comprise a oil port A and an oil port P, and the first restrictor (201), The second restrictor (202), the third restrictor (203) and the fourth restrictor (204) respectively comprise an oil port A and an oil port B, the first hydraulic control on-off valve (301), the second hydraulic control on-off valve (302), the third hydraulic control on-off valve (303) and the fourth hydraulic control on-off valve (304) respectively comprise an oil port A, an oil port B, an oil port X and an oil port Y, the oil port A of the first quick valve (101) and the oil port B of the first hydraulic control on-off valve (301) are respectively communicated with the oil port A of the first pilot-operated high-frequency response flow self-adaptive control unit (2001) through oil pipelines, the oil port P of the first quick valve (101) and the oil port Y of the first hydraulic control on-off valve (301) are respectively communicated with the oil port B of the first pilot-operated high-frequency response flow self-adaptive control unit (2001) through oil pipelines, the oil port A of the first restrictor (201) and the oil port A of the first hydraulic control on-off valve (301) are respectively communicated with the oil port P of the first pilot-operated high-operated, the oil port X of the first hydraulic on-off valve (301) is also communicated with the oil port A of the first hydraulic on-off valve (301) through an oil pipeline, the oil port A of the second quick valve (102) and the oil port B of the second hydraulic on-off valve (302) are both communicated with the oil port A of the second pilot-operated high-frequency response flow self-adaptive control unit (2002) through oil pipelines, the oil port P of the second quick valve (102) and the oil port Y of the second hydraulic on-off valve (302) are both communicated with the oil port B of the second restrictor (202) through oil pipelines, the oil port A of the second restrictor (202) and the oil port A of the second hydraulic on-off valve (302) are both communicated with the oil port P of the second pilot-operated high-frequency response flow self-adaptive control unit (2002) through oil pipelines, the oil port X of the second hydraulic on-off valve (302) is also communicated with the oil port A of the second hydraulic on-off valve (302) through oil pipelines, the oil port A of the third quick valve (103) and the oil port B of the third hydraulic on-off valve (303) are both communicated with the pilot-operated An oil port A of the formula high-frequency response flow self-adaptive control unit (2003) is communicated, an oil port P of the third quick valve (103) and an oil port Y of the third hydraulic control on-off valve (303) are communicated with an oil port B of the third throttle (203) through oil pipelines, the oil port A of the third throttle (203) and the oil port A of the third hydraulic control on-off valve (303) are communicated with the oil port P of the third pilot-operated high-frequency response flow self-adaptive control unit (2003) through oil pipelines, the oil port X of the third hydraulic control on-off valve (303) is also communicated with the oil port A of the second hydraulic control on-off valve (303) through oil pipelines, the oil port A of the fourth quick valve (104) and the oil port B of the third hydraulic control on-off valve (304) are communicated with the oil port A of the fourth pilot-operated high-frequency response flow self-adaptive control unit (2004) through oil pipelines, and the oil port P of the third quick valve (104) and the oil port Y of the third on-off valve (304) are communicated with the oil port B of the third throttle (204) through oil, an oil port A of the third restrictor (204) and an oil port A of the third hydraulic control on-off valve (304) are both communicated with an oil port P of the fourth pilot-operated high-frequency response flow self-adaptive control unit (2004) through an oil pipeline, and an oil port X of the third hydraulic control on-off valve (304) is also communicated with the oil port A of the second hydraulic control on-off valve (304) through an oil pipeline.
9. The low-power consumption flow adaptive hydraulic position closed-loop control system as claimed in claim 2, characterized in that: the hydraulic control system is characterized in that the actuator unit (19) comprises a stopper rod hydraulic cylinder (14) and a displacement sensor (15), one end of the stopper rod hydraulic cylinder (14) is communicated with an oil port A and an oil port B of the actuator unit (19) through oil pipelines respectively, the displacement sensor (15) is connected to the other end of the stopper rod hydraulic cylinder (14), a second high-pressure rubber pipe (902) is further connected to the oil pipeline through which the oil port A of the actuator unit (19) is communicated with the oil port A of the emergency closing unit (17), and a first high-pressure rubber pipe (901) is further connected to the oil pipeline through which the oil port B of the actuator unit (19) is communicated with the oil port B of the emergency closing unit (17).
10. A low power consumption flow adaptive hydraulic position closed-loop control method comprising a low power consumption flow adaptive hydraulic position closed-loop control system according to any one of claims 1 to 9, characterized in that: comprises the following steps
S001: when the electromagnetic reversing valve works normally, the first electromagnetic reversing valve (1301) is electrified, so that the first hydraulic control one-way valve (701) and the second hydraulic control one-way valve (702) are opened, and the second electromagnetic reversing valve (1302) is powered off;
when the execution unit (19) needs to realize a closing function, the first quick valve (101) and the second quick valve (102) are powered on, the third quick valve (103) and the fourth quick valve (104) are powered off, and the stopper rod hydraulic cylinder (14) of the execution unit (19) realizes the closing function;
when the execution unit (19) needs to realize an opening function, the third quick valve (103) and the fourth quick valve (104) are electrified, the first quick valve (101) and the second quick valve (102) are powered off, and the stopper rod hydraulic cylinder (14) of the execution unit (19) realizes the opening function;
when the whole system needs to realize closed-loop control, the electric control system automatically controls the hydraulic closed-loop control unit (18) in real time according to the position of the stopper rod hydraulic cylinder (14) set by the electric control system and detects the numerical value of the displacement sensor (15) on the execution unit (19), and realizes high-precision position control of the stopper rod hydraulic cylinder (14) according to the closing and opening functions of the execution unit (19), so that the position value of the stopper rod hydraulic cylinder (14) required by the process is ensured, and meanwhile, when the numerical value of the displacement sensor (15) is within the range value required by the process, the first quick valve (101), the second quick valve (102), the third quick valve (103), the fourth quick valve (104), the first hydraulic control on-off valve (301), the second hydraulic control on-off valve (302), the third hydraulic control on-off valve (303), and the fourth hydraulic control on-off valve (304) are leakage-free stop hydraulic valves, the position of the stopper rod hydraulic cylinder (14) is locked on the position values of the first quick valve (101), the second quick valve (102), the third quick valve (103) and the fourth quick valve (104) when the power is off, and the closing (or opening) action is triggered again when the numerical value of the displacement sensor (15) is larger than (or smaller than) the range value of the process requirement due to the internal leakage of the stopper rod hydraulic cylinder (14) or other hydraulic elements after the system works for a long time, so that the accurate and automatic control of the position of the stopper rod hydraulic cylinder (14) is realized, and the function of reducing the energy consumption is achieved;
s002: when the manual operation is carried out, the first electromagnetic directional valve (1301) is electrified, the second electromagnetic directional valve (1302) is electrified, the first quick valve (101) is powered off, the second quick valve (102) is powered off, the third quick valve (103) is powered off, and the fourth quick valve (104) is powered off, so that oil ports of an upper cavity and a lower cavity of a stopper rod hydraulic cylinder (14) in an execution unit (19) are communicated, and the stopper rod hydraulic cylinder (14) is depressurized at the moment, so that the position of the stopper rod hydraulic cylinder (14) can be easily manually operated to control the liquid level of the crystallizer;
s003: in an accident state, the first electromagnetic directional valve (1301) is powered off, the second electromagnetic directional valve (1302) is powered off, the first quick valve (101) is powered off, the second quick valve (102) is powered off, the third quick valve (103) is powered off, the fourth quick valve (104) is powered off, high-pressure oil stored in the energy accumulator (12) enters the oil port P through the oil port T of the first high-pressure ball valve (501) and enters the lower cavity of the stopper rod hydraulic cylinder (14) through the oil port A of the first electromagnetic directional valve (1301) and the second check valve (402) and the second rubber pipe (902), so that the stopper rod hydraulic cylinder (14) is closed emergently, the stopper rod hydraulic cylinder (14) cannot be out of control, and major safety accidents are caused.
CN202010392254.8A 2020-05-11 2020-05-11 Low-power-consumption flow self-adaptive hydraulic position closed-loop control system and method Pending CN111594496A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023214880A1 (en) * 2022-05-03 2023-11-09 Speo Products As Actuator assembly and method of use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023214880A1 (en) * 2022-05-03 2023-11-09 Speo Products As Actuator assembly and method of use

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