CN113280021A - Integrated proportional valve control method - Google Patents
Integrated proportional valve control method Download PDFInfo
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- CN113280021A CN113280021A CN202110508153.7A CN202110508153A CN113280021A CN 113280021 A CN113280021 A CN 113280021A CN 202110508153 A CN202110508153 A CN 202110508153A CN 113280021 A CN113280021 A CN 113280021A
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- proportional valve
- signal
- controller
- main
- actuating mechanism
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- 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
- F15B21/087—Control strategy, e.g. with block diagram
-
- 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
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an integrated proportional valve control method, which consists of a main proportional valve bank, a standby proportional valve bank and a proportional valve control device which are integrated in a control cabinet, wherein the proportional valve control device comprises the following steps: the main proportional valve group works as follows: the upper control side gives an actuating mechanism position signal, a main proportional valve signal is started, a main proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control side controller, and the signal isolator 1 uploads the actuating mechanism position signal; the invention has the beneficial effects that: the two paths of proportional valves and the control device are integrated, the control structure is simple, the occupied space of the device is small, the original control mode is simplified, the equipment installation material cost and the labor cost are reduced, and the on-site debugging time of the whole set of equipment is reduced; the device realizes high-precision and high-reliability control of the hydraulic actuating mechanism, can realize maintenance and component replacement without shutdown, and is suitable for maintenance and component replacement requiring long-term operation of equipment and without shutdown.
Description
Technical Field
The invention belongs to the technical field of proportional valve control, and particularly relates to an integrated proportional valve control method.
Background
The proportional valve is a new type of hydraulic control device, on the common pressure valve, flow valve and direction valve, the proportional electromagnet is used to replace the original control part, and the pressure, flow or direction of the oil flow is controlled remotely according to the input electric signal continuously and proportionally; the proportional valve generally has pressure compensation performance, and output pressure and flow can not be influenced by load change.
The existing proportional valve control system is generally separated from a hydraulic part and an electric control part, generally comprises a PLC (programmable logic controller) or an upper computer, a proportional valve driver, a proportional valve and a sensor, and is complex in structure, large in debugging workload due to the separation of the control part and the hydraulic part; the existing method is that the structure of a single control point and a multipoint control part is not changed greatly; and under the condition that a single control point is needed, the cost of the control part is high, the size is large, and the debugging workload is large.
Disclosure of Invention
The invention aims to provide an integrated proportional valve control method, which aims to solve the problems that the conventional proportional valve control system proposed in the background art is generally separated from a hydraulic part and an electric control part, generally consists of a PLC (programmable logic controller) or an upper computer, a proportional valve driver, a proportional valve and a sensor, is complex in structure, is separated from the hydraulic part and has large debugging workload; the existing method is that the structure of a single control point and a multipoint control part is not changed greatly; under the condition that a single control point is needed, the cost of a control part is high, the size is large, and the debugging workload is large.
In order to achieve the purpose, the invention provides the following technical scheme: an integrated proportional valve control method comprises a main proportional valve group, a standby proportional valve group and a proportional valve control device which are integrated in a control cabinet, wherein:
the main proportional valve group works as follows:
the upper control party gives an actuating mechanism position signal, a main proportional valve signal is started, a main proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 1 uploads the actuating mechanism position signal, the controller outputs and controls the reversing valve to be 4.1/4.2 to be opened, and the controller outputs current to control the flow of the oil way A, B according to the received actuating mechanism sensor signal through PID operation and the opening size of the main proportional valve 3.1, so that the position of the actuating mechanism 6 is controlled;
the standby proportional valve group works as follows:
the upper control party gives an actuating mechanism position signal, a spare proportional valve signal is started, a spare proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 2 uploads the actuating mechanism position signal, the controller outputs and controls the reversing valve to be 4.3/4.4 to be opened, and the controller outputs current to control the flow of the oil way A, B according to the received actuating mechanism sensor signal through PID operation and the opening size of the main proportional valve 3.2, so that the position of the actuating mechanism 6 is controlled;
the control method comprises the following steps:
the method comprises the steps that an upper controller gives a command signal of the position of an executing mechanism, a proportional valve signal is started, after the proportional valve control device receives the command signal, the controller outputs current to drive a main proportional valve 1 and start a corresponding reversing valve 4.1/4.2, an external oil source provides a power oil path P and an oil return path T which are not more than 35Mpa for the proportional valve control device, the proportional valve works to output A, B oil paths to the executing mechanism 6, a displacement sensor connected with the executing mechanism 6 detects position analog quantity signals and transmits the position analog quantity signals to a signal isolator 1/2 in the proportional valve control device, the signal isolator transmits one path of feedback signals to the upper controller to monitor the position condition, the other path of feedback signals is output to a proportional valve controller 1/2, the controller outputs and controls the output flow and direction of the proportional valve, and closed-loop control is conducted on the speed and direction of the executing mechanism 6.
In a preferred embodiment of the present invention, the proportional valve controller is developed according to the characteristics of the proportional valve, controls A, B the flow rate and direction of the oil path, and controls the actuator to slowly start, to rapidly run midway, and to decelerate to accurately reach the command signal position by PID calculation.
As a preferred technical solution of the present invention, the present invention further includes a main position sensor 1, and the main position sensor 1 is electrically connected to the signal isolator 1.
As a preferred technical solution of the present invention, the present invention further includes a backup position sensor 2, and the backup position sensor 2 is electrically connected to the signal isolator 2.
As a preferable technical scheme of the invention, the device also comprises a proportional valve controller 1, and the proportional valve controller 1 is electrically connected with the reversing valve 4.1/4.2.
As a preferable technical scheme of the invention, the device also comprises a proportional valve controller 2, and the proportional valve controller 2 is electrically connected with the reversing valve 4.3/4.4.
As a preferred technical solution of the present invention, the main proportional valve 3.1 and the main proportional valve 3.2 are both electrically connected to the actuator.
Compared with the prior art, the invention has the beneficial effects that:
(1) the two paths of proportional valves and the control device are integrated, the control structure is simple, the occupied space of the device is small, the original control mode is simplified, the equipment installation material cost and the labor cost are reduced, and the on-site debugging time of the whole set of equipment is reduced;
(2) the device realizes high-precision and high-reliability control on the hydraulic actuating mechanism, can realize maintenance and replacement of components without shutdown, and is suitable for maintenance and replacement of components requiring long-term operation of equipment and without shutdown;
(3) through set up the support ring that supports power oil circuit P in the switch board to and set up the buffering subassembly on the support ring, help further playing the support to power oil circuit P, reduce the load that power oil circuit P received, prolong power oil circuit P's life.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the appearance structure of the control cabinet of the present invention;
FIG. 3 is a schematic diagram of the control principle of the electric appliance part of the present invention;
FIG. 4 is a side cross-sectional structural view of a support ring of the present invention;
in the figure: 6. an actuator; 9. a support ring; 10. a spring; 12. a containing groove; 13. a protruding portion; 15. a movable block; 16. a resisting block; 17. a main proportional valve bank; 18. a standby proportional valve bank; 19. an external oil source; 20. a control cabinet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: an integrated proportional valve control method is composed of a main proportional valve group 17, a standby proportional valve group 18 and a proportional valve control device which are integrated in a control cabinet 20, wherein:
the main proportional valve group 17 works as follows:
the upper control party gives a position signal of the actuating mechanism 6, a signal of the main proportional valve is started, a main proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 1 uploads the position signal of the actuating mechanism, the controller outputs and controls the reversing valve to be 4.1/4.2 to be opened, and the controller outputs current to control the opening size of the main proportional valve 3.1 to control the flow of the oil way A, B through PID operation according to a received sensor signal (4-20mA) of the actuating mechanism, so that the position of the actuating mechanism 6 is controlled;
the standby proportional valve block 18 works as follows:
the upper control party gives a position signal of the actuating mechanism 6, a spare proportional valve signal is started, a spare proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 2 uploads the position signal of the actuating mechanism, the controller outputs and controls the reversing valve to be 4.3/4.4 to be opened, and the controller outputs current to control the opening size of the main proportional valve 3.2 to control the flow of the oil way A, B through PID operation according to a received sensor signal (4-20mA) of the actuating mechanism, so that the position of the actuating mechanism 6 is controlled;
the control method comprises the following steps:
an upper control party gives a command signal of 4-20mA of the position of an execution mechanism 6, a proportional valve signal is started (a main proportional valve 3.1 or a main proportional valve 3.2 is started), the proportional valve control device receives the command signal and then outputs current to drive the main proportional valve 1 and start a corresponding reversing valve 4.1/4.2, an external oil source 19 provides a power oil path P and an oil return path T which are not more than 35Mpa for the proportional valve system control device, the proportional valve outputs A, B oil paths to the execution mechanism 6, a displacement sensor connected with the execution mechanism 6 detects a position analog quantity signal 4-20mA and transmits the signal to a signal isolator 1/2 in the proportional valve control device, the signal isolator transmits one path of a feedback signal to the upper control party to monitor the position condition, the other path of the feedback signal is output to a proportional valve controller 1/2, and the controller outputs and controls the output flow and direction of the proportional valve, a closed loop control of the speed and direction of the actuator 6 is performed.
In this embodiment, preferably, the proportional valve controller is developed according to the characteristics of the proportional valve, controls A, B oil path flow and direction, and controls the actuator to slowly start, to run quickly in the middle of the process, and to decelerate to accurately reach the command signal position through PID calculation, so as to avoid overshoot and oscillation of the actuator 6 at the target position.
In this embodiment, it is preferable that the sensor further includes a main position sensor 1, and the main position sensor 1 is electrically connected to the signal isolator 1.
In this embodiment, it is preferable that the apparatus further includes a backup position sensor 2, and the backup position sensor 2 is electrically connected to the signal isolator 2.
In this embodiment, it is preferable that the proportional valve controller 1 is further included, and the proportional valve controller 1 is electrically connected to the directional valve 4.1/4.2.
In this embodiment, it is preferable that the proportional valve controller 2 is further included, and the proportional valve controller 2 is electrically connected to the directional valve 4.3/4.4.
In this embodiment, preferably, the main proportional valve 3.1 and the main proportional valve 3.2 are both electrically connected to the actuator 6.
In this embodiment, preferably, the power oil path control device further includes a support ring 9 located in the control cabinet 20 and supporting the power oil path P, an extending portion 13 is disposed at an end portion of the support ring 9, a buffer assembly is disposed on the support ring 9 and includes a spring 10, an accommodating groove 12, a movable block 15 and a abutting block 16, the accommodating groove 12 is disposed on the surface of the support ring 9, one end of the movable block 15 is embedded in the accommodating groove 12, the other end of the movable block 15 extends out of the accommodating groove 12 and is connected to the abutting block 16, the spring 10 is connected to the movable block 15 and a groove bottom of the spring 10, and the support ring 9 is located outside the power oil path P, so as to further support the power oil path P and reduce a load borne by the power oil path P.
The invention needs to be supplemented by: maintenance without shutdown and component replacement:
when the main proportional valve works, the ball valves 2.3, 2.4, 5.3 and 5.4 can be closed, and the proportional valve 3.2 and the reversing valves 4.3 and 4.4 can be replaced; when the standby proportional valve works, the ball valves 2.1, 2.2, 5.1 and 5.2 can be closed, and the proportional valve 3.1 and the reversing valves 4.1 and 4.2 can be replaced.
The invention needs to be supplemented by: replacing the filter element of the filter without stopping the machine:
the control device uses a double-cylinder filter, and the filter can be manually switched to a non-stop state to replace the filter element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An integrated proportional valve control method is characterized in that: the proportional valve control device comprises a main proportional valve group (17), a standby proportional valve group (18) and a proportional valve control device which are integrated in a control cabinet (20), wherein:
the main proportional valve group (17) works as follows:
the upper control party gives a position signal of the actuating mechanism (6), a main proportional valve signal is started, a main proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 1 uploads the position signal of the actuating mechanism, the controller outputs and controls the reversing valve to be 4.1/4.2 to be opened, and the controller outputs current to control the flow of the oil way A, B according to the received sensor signal of the actuating mechanism through PID operation and the opening size of the main proportional valve 3.1, so that the position of the actuating mechanism (6) is controlled;
the standby proportional valve group (18) works as follows:
the upper control party gives a position signal of the actuating mechanism (6), a spare proportional valve signal is started, a spare proportional valve controller in the proportional valve control device is started and uploads a normal working state signal of the upper control party controller, the signal isolator 2 uploads the position signal of the actuating mechanism, the controller outputs and controls the reversing valve to be 4.3/4.4 to be opened, and the controller outputs current to control the flow of the oil way A, B according to the received sensor signal of the actuating mechanism through PID operation and the opening size of the main proportional valve 3.2, so that the position of the actuating mechanism (6) is controlled;
the control method comprises the following steps:
an upper control party gives a command signal of the position of an executing mechanism (6), a proportional valve signal is started, after the proportional valve control device receives the command signal, the controller outputs current to drive a main proportional valve 1 and start a corresponding reversing valve 4.1/4.2, an external oil source (19) provides a power oil path P and an oil return path T which are not more than 35Mpa for the proportional valve control device, the proportional valve works to output A, B oil paths to the executing mechanism (6), a displacement sensor connected with the executing mechanism (6) detects a position analog quantity signal and transmits the position analog quantity signal to a signal isolator 1/2 in the proportional valve control device, and the signal isolator uploads one path of a feedback signal to the upper control party to monitor the position condition, one output is sent to a proportional valve controller 1/2, which controls the output flow and direction of the proportional valve and performs a closed loop control of the speed and direction of the actuator (6).
2. An integrated proportional valve control method as claimed in claim 1, wherein: the proportional valve controller is developed according to the characteristics of the proportional valve, controls A, B oil path flow and direction, and controls the actuator to slowly start, quickly run midway and decelerate to accurately reach the position of the instruction signal through PID operation.
3. An integrated proportional valve control method as claimed in claim 1, wherein: the device also comprises a main position sensor 1, and the main position sensor 1 is electrically connected with the signal isolator 1.
4. An integrated proportional valve control method as claimed in claim 1, wherein: the device also comprises a standby position sensor 2, and the standby position sensor 2 is electrically connected with the signal isolator 2.
5. An integrated proportional valve control method as claimed in claim 1, wherein: the proportional valve control device further comprises a proportional valve controller 1, and the proportional valve controller 1 is electrically connected with the reversing valve 4.1/4.2.
6. An integrated proportional valve control method as claimed in claim 1, wherein: the proportional valve control device further comprises a proportional valve controller 2, and the proportional valve controller 2 is electrically connected with the reversing valve 4.3/4.4.
7. An integrated proportional valve control method as claimed in claim 1, wherein: the main proportional valve 3.1 and the main proportional valve 3.2 are both electrically connected with the actuating mechanism (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110508153.7A CN113280021A (en) | 2021-05-11 | 2021-05-11 | Integrated proportional valve control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110508153.7A CN113280021A (en) | 2021-05-11 | 2021-05-11 | Integrated proportional valve control method |
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| CN113280021A true CN113280021A (en) | 2021-08-20 |
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