CN111594492A - Control method and system for ground service system - Google Patents
Control method and system for ground service system Download PDFInfo
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- CN111594492A CN111594492A CN202010464238.5A CN202010464238A CN111594492A CN 111594492 A CN111594492 A CN 111594492A CN 202010464238 A CN202010464238 A CN 202010464238A CN 111594492 A CN111594492 A CN 111594492A
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- way valve
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/28—Liquid-handling installations specially adapted for fuelling stationary aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/36—Other airport installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/36—Other airport installations
- B64F1/362—Installations for supplying conditioned air to parked aircraft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
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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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
- F15B11/048—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member with deceleration control
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- 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
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/18—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in axial direction
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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
- F15B2201/00—Accumulators
- F15B2201/50—Monitoring, detection and testing means for accumulators
- F15B2201/51—Pressure detection
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/86—Control during or prevention of abnormal conditions
-
- 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
- F15B2211/8755—Emergency shut-down
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a control method for a ground service system, which comprises the following steps: starting an oil pump motor, and closing the oil pump motor when the oil pressure of the energy storage tank continuously rises to a preset pressure value; switching on the three-position five-way valve to open, and continuously lifting the hydraulic cylinder bearing lifting platform to a specified upper limit position; opening a lifting box door, switching on the open circuit of the three-position five-way valve to drive the hydraulic motor to rotate forwards, pumping up the flexible pipeline and completing pipeline butt joint; switching on a three-position five-way valve loop, drawing away the flexible pipeline to descend, and closing the lifting box door; the control system adopts a hydraulic system, can stably, safely and quickly complete the lifting action and the action of a conveying pipeline, effectively reduces the control steps, improves the safety and the stability of control, and conveniently and quickly provides service supply for a ground airport.
Description
Technical Field
The invention relates to the technical field of lifting, in particular to a control method and a control system for a ground service system.
Background
The airport surface service supply mainly comprises the following steps: the airplane is used for power supply, air conditioning, oil, sewage treatment, clear water, aviation food and the like, and most of domestic airports at present adopt various special vehicles to guarantee the supply of the resources. The safeguard system has great safety defect, various different large-scale equipment can guarantee the airplane at the same time and at the same airport bridge position, various pipelines are mixed and disorderly, and safety accidents such as collision and the like are easy to happen between vehicles due to distance problems, so that great potential safety hazards are caused; secondly, the shuttle of various large-scale special fuel vehicles back and forth on the airport apron also inevitably brings certain environmental pollution to the airport apron, and the large-scale use of the equipment also causes the problems of high cost, low efficiency, high operation and management cost and the like.
Therefore, the applicant designs an airport ground vehicle-free service system, which can eliminate potential safety hazards and cost problems caused by the back-and-forth shuttle of the traditional large special fuel vehicles on the airport, but the lifting stability and safety requirements of the lifting platform are high due to the large weight of various supply modules, and the quality requirements of the airport ground vehicle-free service system cannot be met by the traditional lifting platform control method and control system.
Disclosure of Invention
In view of the above problems, the present invention provides a control method and system for a ground service system, which mainly solve the problems in the background art.
The invention discloses a control method for a ground service system, which comprises the following steps:
s1, turning on a system power switch, starting an oil pump motor, and turning off the oil pump motor when the oil pressure of the energy storage tank continuously rises to a preset pressure value;
s2, when the oil pressure of the energy storage pipe reaches a preset pressure value, a hydraulic cylinder rising signal switch is turned on, a three-position five-way valve is switched on and is opened, the hydraulic cylinder bearing lifting platform continuously rises to a specified upper limit position, then the three-position five-way valve is turned off, and the hydraulic cylinder keeps static;
s3, opening the lifting box door, starting the pipeline conveyor, switching on the three-position five-way valve to open the circuit to drive the hydraulic motor to rotate forwards, pumping up the flexible pipeline to a specified length, and then closing the three-position five-way valve to complete pipeline butt joint;
s4, switching on a three-position five-way valve circuit to drive a hydraulic motor to rotate reversely, closing the three-position five-way valve after the flexible pipeline is pulled away and the flexible pipeline is descended to a specified length, and closing the door of the lifting box;
and S5, turning on a hydraulic cylinder descending signal switch, switching on a three-position five-way valve loop, and turning off the three-position five-way valve after the hydraulic cylinder bearing lifting platform continuously descends to a specified lower limit position.
In a further improvement, the step S2 further includes:
and when the lifting platform breaks down in the lifting process, the hydraulic cylinder lifting signal switch is turned off, the three-position five-way valve is automatically turned off, the hydraulic cylinder keeps in a static position, and the step S2 is restarted after the fault maintenance is finished.
In a further improvement, the step S3 further includes:
and when the safety grating detects that the flexible pipeline rises to the wrong height, the three-position five-way valve is automatically closed, the hydraulic motor stops rotating, and the step S3 is restarted after the rising direction of the flexible pipeline is adjusted.
In a further improvement, the step S3 further includes:
and when the flexible pipeline breaks down in the ascending process, pressing an emergency stop button, automatically closing the three-position five-way valve, stopping the rotation of the hydraulic motor, and restarting the step S3 after the breakdown maintenance is finished.
In a further improvement, the step S5 further includes:
and when the lifting platform breaks down in the descending process, the hydraulic cylinder descending signal switch is closed, the three-position five-way valve is automatically closed, the hydraulic cylinder keeps in the original position and is static, and the step S5 is restarted after the fault maintenance is finished.
In a further improvement, the step S5 further includes:
when the hydraulic cylinder descends to a preset position, the throttle oil path valve is opened, the hydraulic cylinder is switched to a low-speed oil return mode, the hydraulic cylinder slowly descends to a specified lower limit position, and the height of the preset position is higher than the specified lower limit position.
The invention also discloses a control system for the ground service system, which comprises the control method for the ground service system, and further comprises an energy storage tank hydraulic pressure detection control unit, a hydraulic valve action signal control unit, a safety limit detection unit and a hydraulic motor control unit, wherein the energy storage tank hydraulic pressure detection control unit is used for detecting the hydraulic pressure value in the energy storage tank and controlling the closing of the oil pump motor; the hydraulic valve action signal control unit is used for opening and closing the three-position five-way valve and the throttling oil circuit valve; the safety limit detection unit is used for detecting the ascending/descending condition of the flexible pipeline; the hydraulic motor control unit is used for controlling the rotating speed and the forward and reverse rotating directions of the hydraulic motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the control system adopts a hydraulic system, can stably, safely and quickly bear the lifting platform to complete the lifting action and the action of a conveying pipeline, reduces the insertion of other power sources, can effectively reduce the control steps, improves the safety and the stability of control, and conveniently and quickly provides service supply for a ground airport;
2. according to the invention, the throttle oil circuit valve is added in the lifting process of the lifting platform, so that the lifting platform can be stably lifted, and the safety grating is arranged in the door of the lifting box, so that the safety of pipeline transportation can be improved.
Drawings
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Fig. 1 is a control flow diagram according to an embodiment of the present invention.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, in one aspect, the present invention discloses a control method for a ground service system, the control method including:
s1, turning on a system power switch, starting an oil pump motor, and turning off the oil pump motor when the oil pressure of the energy storage tank continuously rises to a preset pressure value;
s2, when the oil pressure of the energy storage pipe reaches a preset pressure value, a hydraulic cylinder rising signal switch is turned on, a three-position five-way valve is switched on and is opened, the hydraulic cylinder bearing lifting platform continuously rises to a specified upper limit position, then the three-position five-way valve is turned off, and the hydraulic cylinder keeps static;
s3, opening the lifting box door, starting the pipeline conveyor, switching on the three-position five-way valve to open the circuit to drive the hydraulic motor to rotate forwards, pumping up the flexible pipeline to a specified length, and then closing the three-position five-way valve to complete pipeline butt joint;
s4, switching on a three-position five-way valve circuit to drive a hydraulic motor to rotate reversely, closing the three-position five-way valve after the flexible pipeline is pulled away and the flexible pipeline is descended to a specified length, and closing the door of the lifting box;
and S5, turning on a hydraulic cylinder descending signal switch, switching on a three-position five-way valve loop, and turning off the three-position five-way valve after the hydraulic cylinder bearing lifting platform continuously descends to a specified lower limit position.
It can be understood that, in the embodiment of the present invention, the control object is a lifting platform serving an airport ground service system, the lifting platform includes an embedded part disposed on the ground, and a fixed frame fixedly connected to the embedded part, a movable device assembly is slidably mounted inside the fixed frame, a pipeline conveyor is disposed inside the movable device assembly, a hydraulic cylinder is disposed on a bottom surface of the movable device assembly, the pipeline conveyor and the hydraulic cylinder are both uniformly controlled by a hydraulic system, the flexible pipeline is inserted into the pipeline conveyor, a lifting box door is disposed on an upper end of the movable device assembly, the lifting box door is a pneumatic door, a safety grating is disposed inside the lifting box, and the safety grating is used for monitoring the rising of the flexible pipeline to prevent safety accidents.
It can be understood that, in the embodiment of the present invention, the fixed frame is respectively provided with an upper limit proximity sensor, a lower limit proximity sensor and a delivery sensor, the hydraulic cylinder stops rising when rising to the position of the upper limit proximity sensor, the hydraulic cylinder stops falling when falling to the position of the lower limit proximity sensor, and the delivery sensor can transmit information and assist in controlling the opening and closing of the throttle oil path valve when the hydraulic cylinder is about to reach the upper limit or the lower limit, so as to achieve the purpose of improving the stability of the hydraulic cylinder.
It is understood that in the embodiment of the present invention, a control button box is further provided, and the control button box is provided with a switch button of a system power supply, an up signal/down signal switch, and start/stop and emergency stop buttons of the line conveyor.
It can be understood that in the embodiment of the present invention, the door of the lifting box is further provided with a safety door magnetic induction switch, and the safety door magnetic induction switch can monitor whether the safety door is completely opened or closed, so as to assist in controlling the opening and closing of the pipeline conveyor, prevent a fault from occurring during pipeline conveying, and improve system safety.
In a further improvement, the step S2 further includes:
and when the lifting platform breaks down in the lifting process, the hydraulic cylinder lifting signal switch is turned off, the three-position five-way valve is automatically turned off, the hydraulic cylinder keeps in a static position, and the step S2 is restarted after the fault maintenance is finished.
In a further improvement, the step S3 further includes:
and when the safety grating detects that the flexible pipeline rises to the wrong height, the three-position five-way valve is automatically closed, the hydraulic motor stops rotating, and the step S3 is restarted after the rising direction of the flexible pipeline is adjusted.
In a further improvement, the step S3 further includes:
and when the flexible pipeline breaks down in the ascending process, pressing an emergency stop button, automatically closing the three-position five-way valve, stopping the rotation of the hydraulic motor, and restarting the step S3 after the breakdown maintenance is finished.
In a further improvement, the step S5 further includes:
and when the lifting platform breaks down in the descending process, closing the descending signal of the hydraulic cylinder, automatically closing the three-position five-way valve, keeping the hydraulic cylinder in the original position still, and restarting the step S5 after the fault maintenance is finished.
In a further improvement, the step S5 further includes:
when the hydraulic cylinder descends to a preset position, the throttle oil path valve is opened, the hydraulic cylinder is switched to a low-speed oil return mode, the hydraulic cylinder slowly descends to a specified lower limit position, and the height of the preset position is higher than the specified lower limit position.
The invention also discloses a control system for the ground service system, which comprises the control method for the ground service system, and further comprises an energy storage tank hydraulic pressure detection control unit, a hydraulic valve action signal control unit, a safety limit detection unit and a hydraulic motor control unit, wherein the energy storage tank hydraulic pressure detection control unit is used for detecting the hydraulic pressure value in the energy storage tank and controlling the closing of the oil pump motor; the hydraulic valve action signal control unit is used for opening and closing the three-position five-way valve and the throttling oil circuit valve; the safety limit detection unit is used for detecting the ascending/descending condition of the flexible pipeline; the hydraulic motor control unit is used for controlling the rotating speed and the forward and reverse rotating directions of the hydraulic motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the control system adopts a hydraulic system, can stably, safely and quickly bear the lifting platform to complete the lifting action and the action of a conveying pipeline, reduces the insertion of other power sources, can effectively reduce the control steps, improves the safety and the stability of control, and conveniently and quickly provides service supply for a ground airport;
2. according to the invention, the throttle oil circuit valve is added in the lifting process of the lifting platform, so that the lifting platform can be stably lifted, and the safety grating is arranged in the door of the lifting box, so that the safety of pipeline transportation can be improved.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A control method for a ground service system, the control method comprising:
s1, starting an oil pump motor, and closing the oil pump motor when the oil pressure of the energy storage tank continuously rises to a preset pressure value;
s2, turning on a hydraulic cylinder lifting signal switch, switching on the three-position five-way valve to be opened, turning off the three-position five-way valve after the hydraulic cylinder bearing lifting platform continuously rises to a specified upper limit position, and keeping the hydraulic cylinder static;
s3, opening the lifting box door, starting the pipeline conveyor, switching on the three-position five-way valve to open the circuit to drive the hydraulic motor to rotate forwards, pumping up the flexible pipeline to a specified length, and then closing the three-position five-way valve to complete pipeline butt joint;
s4, switching on a three-position five-way valve circuit to drive a hydraulic motor to rotate reversely, closing the three-position five-way valve after the flexible pipeline is pulled away and the flexible pipeline is descended to a specified length, and closing the door of the lifting box;
and S5, turning on a hydraulic cylinder descending signal switch, switching on a three-position five-way valve loop, and turning off the three-position five-way valve after the hydraulic cylinder bearing lifting platform continuously descends to a specified lower limit position.
2. The control method for a ground service system according to claim 1, wherein the step S2 further comprises:
and when the lifting platform breaks down in the lifting process, the hydraulic cylinder lifting signal is turned off, the three-position five-way valve is automatically turned off, the hydraulic cylinder keeps in a static position, and the step S2 is restarted after the fault maintenance is finished.
3. The control method for a ground service system according to claim 1, wherein the step S3 further comprises:
and when the safety grating detects that the flexible pipeline rises to the wrong height, the three-position five-way valve is automatically closed, the hydraulic motor stops rotating, and the step S3 is restarted after the rising direction of the flexible pipeline is adjusted.
4. The control method for a ground service system according to claim 1, wherein the step S3 further comprises:
and when the flexible pipeline breaks down in the ascending process, pressing an emergency stop button, automatically closing the three-position five-way valve, stopping the rotation of the hydraulic motor, and restarting the step S3 after the breakdown maintenance is finished.
5. The control method for a ground service system according to claim 1, wherein the step S5 further comprises:
and when the lifting platform breaks down in the descending process, closing the descending signal of the hydraulic cylinder, automatically closing the three-position five-way valve, keeping the hydraulic cylinder in the original position still, and restarting the step S5 after the fault maintenance is finished.
6. The control method for a ground service system according to claim 1, wherein the step S5 further comprises:
when the hydraulic cylinder descends to a preset position, the throttle oil path valve is opened, the hydraulic cylinder is switched to a low-speed oil return mode, the hydraulic cylinder slowly descends to a specified lower limit position, and the height of the preset position is higher than the specified lower limit position.
7. A control system for a ground service system is characterized by comprising an energy storage tank hydraulic pressure detection control unit, a hydraulic valve action signal control unit, a safety limit detection unit and a hydraulic motor control unit, wherein the energy storage tank hydraulic pressure detection control unit is used for detecting a hydraulic pressure value in an energy storage tank and controlling the closing of an oil pump motor; the hydraulic valve action signal control unit is used for opening and closing the three-position five-way valve and the throttling oil circuit valve; the safety limit detection unit is used for detecting the ascending/descending condition of the flexible pipeline; the hydraulic motor control unit is used for controlling the rotating speed and the forward and reverse rotating directions of the hydraulic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010464238.5A CN111594492A (en) | 2020-05-27 | 2020-05-27 | Control method and system for ground service system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010464238.5A CN111594492A (en) | 2020-05-27 | 2020-05-27 | Control method and system for ground service system |
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| CN111594492A true CN111594492A (en) | 2020-08-28 |
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| CN202010464238.5A Pending CN111594492A (en) | 2020-05-27 | 2020-05-27 | Control method and system for ground service system |
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Application publication date: 20200828 |