CN105298966A - Monitoring and controlling system and control method of piston type adjusting valve - Google Patents
Monitoring and controlling system and control method of piston type adjusting valve Download PDFInfo
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- CN105298966A CN105298966A CN201510804557.5A CN201510804557A CN105298966A CN 105298966 A CN105298966 A CN 105298966A CN 201510804557 A CN201510804557 A CN 201510804557A CN 105298966 A CN105298966 A CN 105298966A
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- oil
- oil cylinder
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- actuating motor
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Abstract
The invention relates to a monitoring and controlling system and control method of a piston type adjusting valve. The monitoring and controlling system comprises a servo motor and a signal processing control module. The servo motor is used for driving an oil pump to work. A servo valve is opened and closed for controlling oil injection. The signal processing control module is used for processing signals collected by a signal collecting module and outputting a processing result to a servo driver. The rotating speed of the servo motor is changed through the servo driver, meanwhile, the servo valve is controlled to be opened and closed by outputting signals, the oil amount is obtained through detection and calculation, and the oil amount Q is converted into a digital signal to be output to the servo driver, so that the rotating speed of the servo motor is changed. By means of the signal collecting module and the signal processing module, oil pressure input signals of a valve body of the adjusting valve and an oil cylinder are collected and monitored in real time and fed back to the servo motor; the oil injection amount of the oil pump is changed by changing the rotating speed of the servo motor; and the servo valve is opened so that oil can pass through the oil pump to be injected into the oil cylinder, and the opening and closing amount of the valve body of the adjusting valve is automatically achieved in the whole process.
Description
Technical field
The present invention relates to a kind of automatic on-line Monitoring and Controlling energy conserving system, particularly a kind of monitor control system of piston type regulating valve and controlling method thereof.
Background technique
At present, large-scale water undertaking has reached increasingly automated all, and from the recovery of water, storage, purified treatment to distribution, hundreds of data and measured value are all collected by process control computer system, store and process, measuring, operate, regulating the process control reaching technical elements the best all whereby.
Piston type axial flow modulating valve primarily of valve body, piston, lead the compositions such as cap, seal ring, guide rod, connecting rod, crank, actuator.Main valve body is inside and outside cylinder mode, have in valve body some following currents to gusset couple together two-layer inside and outside valve body, form a complete axisymmetric annular fluid passage.Regulation structure is slidercrank mechanism, and slide block is columnar piston, and piston nose connects mouse cage, and mouse cage periphery is grid runner, by rail guidance in inner cylinder, can do axial displacement along pipeline, changes runner by area, to realize regulating and controlling.Runner is axialsymmetric flow road, and it is large that grid crosses water cross section, and can prevent foreign material from blocking, fluid is guided well in cleanliness valve body, and low water head loses; In valve pocket, current transverse section, any position is ring-type, guarantees linear operation characteristic, and high-velocity flow flows into from grid simultaneously, mutually clashes at valve flowing channel central core region, eliminates energy, makes cavitation phenomenon occur in valve central position, not damage threshold door part.Slidercrank mechanism stable operation is reliable, and output torque is constant, closes first quick and back slow, thus without any water hammer.Should, according to outlet pressure, control to drive Electric actuator change valve opening or closed condition to realize automatic pressure reducing function through regulator.
Summary of the invention
In order to the valve opening and closing overcoming modulating valve does not reach optimally-controlled deficiency, the invention provides a kind of monitor control system and controlling method thereof of piston type regulating valve.
The technical solution adopted in the present invention is: a kind of monitor control system of piston type regulating valve, it comprises the hydraulic station, oil pump, the oil cylinder that connect successively, and modulating valve oil cylinder actuator, described modulating valve oil cylinder actuator comprises and is positioned at in-oil cylinder piston, described hydraulic station is by oil pump toward oiling in oil cylinder, and described oil cylinder is positioned at modulating valve, also comprises actuating motor, described actuating motor is connected with oil pump, drives operation of oil pump; Servovalve, described servovalve is connected between oil pump and oil cylinder, controls oiling by the keying of servovalve; Signal acquisition module, gathers the oil pressure input signal of the displacement amount of piston in oil cylinder, control valve position command signal and oil cylinder; Signal transacting control module, is connected with signal acquisition module, processes, and processing result is outputted to servo driver, changed the rotating speed of actuating motor by servo driver to the signal gathered, and output signal controls the keying of servovalve simultaneously.
Described signal acquisition module comprises linear displacement transducer, and this linear displacement transducer is arranged on piston, for gathering the displacement amount of piston in oil cylinder.
Described signal acquisition module comprises pressure transmitter, and this pressure transmitter is arranged on hydraulic station, for gathering the oil pressure input signal of oil cylinder.
Described servo driver is provided with actuating motor power signal and gathers port and display floater, and described actuating motor power signal gathers port and is connected with upper-position unit, and to obtain actuating motor power signal, and display on a display panel.
Described signal transacting control module comprises the analog output module of electrical connection, analog output module 2, digital module and encoder, processing result is outputted to motor servo driver and digital module by described analog output module 2 respectively, described encoder is connected with actuating motor, obtain the real-time dynamic speed of actuating motor, and feed back to motor servo driver and digital module.
A controlling method for piston type regulating valve, its step is as follows:
S1: the displacement amount L1 being recorded piston by linear displacement transducer, obtain the command signal L2 of modulating valve, carry out mathematic interpolation, obtain absolute value L3, namely
L3=|L1-L2|；
S2: the dynamic time T2 calculating cylinder movement, namely
T1/L4=T2/L3
T2=L3·（T1/L4）
Wherein, the time of T1-piston whole stroke of movement in oil cylinder;
The whole length of oil cylinder of L4-;
S3: according to oil mass formula,
Q=V/T；
Wherein, the volume of V-oil cylinder;
T-oil is full of the time required for oil hydraulic cylinder;
The oil mass Q mended can be needed,
Q=V/T2=（A·L3）/T2
Wherein, effective work area of A-piston;
S4: converting oil mass Q to digital signal by tabling look-up, outputting to servo driver, changing the rotating speed of actuating motor.
The invention has the beneficial effects as follows: the present invention is by signal acquisition module and signal processing module, Real-time Collection and monitoring are carried out to the valve of modulating valve and the oil pressure input signal of oil cylinder, and feed back to actuating motor, by the change of actuating motor rotating speed, change the oil filling amount of oil pump, and open servovalve, oil can be injected in oil cylinder through oil pump, and whole-course automation realizes the keying amount of modulating valve valve.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Fig. 2, Fig. 3 are the circuit connection diagrams that the present invention is complete.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of monitor control system of piston type regulating valve, it comprises the hydraulic station, oil pump, the oil cylinder that connect successively, and modulating valve oil cylinder actuator, described modulating valve oil cylinder actuator comprises and is positioned at in-oil cylinder piston, described hydraulic station by oil pump toward oiling in oil cylinder, described oil cylinder is positioned at modulating valve, also comprise actuating motor, described actuating motor is connected with oil pump, drives operation of oil pump, servovalve, described servovalve is connected between oil pump and oil cylinder, controls oiling by the keying of servovalve, signal acquisition module, gathers the oil pressure input signal of the displacement amount of piston in oil cylinder, control valve position command signal and oil cylinder, signal transacting control module, be connected with signal acquisition module, the signal gathered is processed, and processing result is outputted to servo driver, the rotating speed of actuating motor is changed by servo driver, output signal controls the keying of servovalve simultaneously, by signal acquisition module and signal processing module, Real-time Collection and monitoring are carried out to the valve of modulating valve and the oil pressure input signal of oil cylinder, and feed back to actuating motor, by the change of actuating motor rotating speed, change the oil filling amount of oil pump, and open servovalve, oil can be injected in oil cylinder through oil pump, whole-course automation realizes the keying amount of modulating valve valve, thus reach the deceleration of oil pump and the minimizing of the electric motor starting frequency, prolonged mechanical life-span and minimizing energy consumption, reach the object of energy-saving and emission-reduction.
Described signal acquisition module comprises linear displacement transducer, and this linear displacement transducer is arranged on piston, for gathering the displacement amount of piston in oil cylinder, and this linear displacement transducer control accuracy 0.2%.
Described signal acquisition module comprises pressure transmitter, and this pressure transmitter is arranged on hydraulic station, for gathering the oil pressure input signal of oil cylinder, and this pressure transmitter control accuracy 0.1%.The detection of oil cylinder dynamic value is carried out with displacement transducer plus-pressure sensor, and then the rotating speed of control oil pump, reach the ability of Intelligent Measurement and the self adaptive control of Oil pump electrical machinery rotating speed.
Described servo driver is provided with actuating motor power signal and gathers port and display floater, described actuating motor power signal gathers port and is connected with upper-position unit, to obtain actuating motor power signal, and display on a display panel, and described servo driver adopts AB755.
Described signal transacting control module comprises the analog output module of electrical connection, analog output module 2, digital module and encoder, processing result is outputted to motor servo driver and digital module by described analog output module 2 respectively, described encoder is connected with actuating motor, obtain the real-time dynamic speed of actuating motor, and feed back to motor servo driver and digital module, two-way output quantity, form two-way closed loop control, be used for the rotating speed of automated closed-loop actuating motor, both the rotating speed of actuating motor had been controlled, simultaneously again by the speed feedback after changing in motor servo driver, thus the oily flow supply needed for control oil cylinder.
A controlling method for piston type regulating valve, its step is as follows:
S1: the displacement amount L1 being recorded piston by linear displacement transducer, obtain the command signal L2 of modulating valve, carry out mathematic interpolation, obtain absolute value L3, namely
L3=|L1-L2|；
S2: the dynamic time T2 calculating cylinder movement, namely
T1/L4=T2/L3
T2=L3·（T1/L4）
Wherein, the time of T1-piston whole stroke of movement in oil cylinder;
The whole length of oil cylinder of L4-;
S3: according to oil mass formula,
Q=V/T；
Wherein, the volume of V-oil cylinder;
T-oil is full of the time required for oil hydraulic cylinder;
The oil mass Q mended can be needed,
Q=V/T2=（A·L3）/T2
Wherein, effective work area of A-piston;
S4: oil mass Q is outputted to servo driver, by tabling look-up, (referring to table 1) converts oil mass Q to rotating speed, changes the rotating speed of actuating motor.
Below described by reference to the accompanying drawings embodiment is only the preferred embodiment of the present invention, and the restriction not to protection scope of the present invention, and any improvement done based on the present invention's spirit all ought within scope.
Claims (6)
1. a monitor control system for piston type regulating valve, it comprises the hydraulic station, oil pump, the oil cylinder that connect successively, and is positioned at in-oil cylinder piston, and described hydraulic station is by oil pump toward oiling in oil cylinder, and described oil cylinder is positioned at modulating valve, it is characterized in that: also comprise
Actuating motor, described actuating motor is connected with oil pump, drives operation of oil pump;
Servovalve, described servovalve is connected between oil pump and oil cylinder, controls oiling by the keying of servovalve;
Signal acquisition module, gathers the oil pressure input signal of the displacement amount of piston in oil cylinder, control valve position command signal and oil cylinder;
Signal transacting control module, is connected with signal acquisition module, processes, and processing result is outputted to servo driver, changed the rotating speed of actuating motor by servo driver to the signal gathered, and output signal controls the keying of servovalve simultaneously.
2. the monitor control system of a kind of piston type regulating valve according to claim 1, it is characterized in that: described signal acquisition module comprises linear displacement transducer, this linear displacement transducer is arranged on piston, for gathering the displacement amount of piston in oil cylinder.
3. the monitor control system of a kind of piston type regulating valve according to claim 1, it is characterized in that: described signal acquisition module comprises pressure transmitter, this pressure transmitter is arranged on hydraulic station, for gathering the oil pressure input signal of oil cylinder.
4. the monitor control system of a kind of piston type regulating valve according to claim 1, it is characterized in that: described servo driver is provided with actuating motor power signal and gathers port and display floater, described actuating motor power signal gathers port and is connected with upper-position unit, to obtain actuating motor power signal, and display on a display panel.
5. the monitor control system of a kind of piston type regulating valve according to claim 1, it is characterized in that: described signal transacting control module comprises the analog output module of electrical connection, analog output module 2, digital module and encoder, processing result is outputted to motor servo driver and digital module by described analog output module 2 respectively, described encoder is connected with actuating motor, obtain the real-time dynamic speed of actuating motor, and feed back to motor servo driver and digital module.
6. a controlling method for piston type regulating valve, is characterized in that, its step is as follows:
S1: the displacement amount L1 being recorded piston by linear displacement transducer, obtain the command signal L2 of modulating valve, carry out mathematic interpolation, obtain absolute value L3, namely
L3=|L1-L2|；
S2: the dynamic time T2 calculating cylinder movement, namely
T1/L4=T2/L3
T2=L3·（T1/L4）
Wherein, the time of T1-piston whole stroke of movement in oil cylinder;
The whole length of oil cylinder of L4-;
S3: according to oil mass formula,
Q=V/T；
Wherein, the volume of V-oil cylinder;
T-oil is full of the time required for oil hydraulic cylinder;
The oil mass Q mended can be needed,
Q=V/T2=（A·L3）/T2
Wherein, effective work area of A-piston;
S4: converting oil mass Q to digital signal by tabling look-up, outputting to servo driver, changing the rotating speed of actuating motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510804557.5A CN105298966B (en) | 2015-11-20 | 2015-11-20 | Control method of piston type adjusting valve for piston type adjusting valve monitoring and controlling system |
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|---|---|---|---|
| CN201510804557.5A CN105298966B (en) | 2015-11-20 | 2015-11-20 | Control method of piston type adjusting valve for piston type adjusting valve monitoring and controlling system |
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| CN105298966A true CN105298966A (en) | 2016-02-03 |
| CN105298966B CN105298966B (en) | 2017-05-03 |
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| CN201510804557.5A Active CN105298966B (en) | 2015-11-20 | 2015-11-20 | Control method of piston type adjusting valve for piston type adjusting valve monitoring and controlling system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584000A (en) * | 2017-10-17 | 2018-01-16 | 柳州北斗星液压科技有限公司 | A kind of more siphunculus formation systems and method |
| CN108407383A (en) * | 2018-02-12 | 2018-08-17 | 佛山市宏德机器制造有限公司 | A kind of hydraulic press piston closed-loop control system |
| CN108931077A (en) * | 2018-06-13 | 2018-12-04 | 重庆美的通用制冷设备有限公司 | Control method, control device and the electronic equipment of oil pressure differential regulating valve |
| CN111649933A (en) * | 2020-06-11 | 2020-09-11 | 宁波世纪恒祥自控技术有限公司 | Universal calibration system and calibration method for slide valve |
| CN112327951A (en) * | 2020-12-04 | 2021-02-05 | 中国船舶工业集团公司第七0八研究所 | Automatic flow control system for water pump hydraulic performance test bed |
| CN113236615A (en) * | 2021-04-07 | 2021-08-10 | 华南理工大学 | Hydraulic vibration hammer starting control system and implementation method thereof |
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| JP2005140175A (en) * | 2003-11-04 | 2005-06-02 | Toyooki Kogyo Co Ltd | Hydraulic drive |
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| CN201496562U (en) * | 2009-09-10 | 2010-06-02 | 江南阀门有限公司 | Built-in oil cylinder structure of piston type axial-flow valve |
| CN102226453A (en) * | 2011-06-22 | 2011-10-26 | 太原理工大学 | Dual-redundancy electro hydraulic servo actuator |
| CN104791332A (en) * | 2015-04-10 | 2015-07-22 | 中国航天科技集团公司烽火机械厂 | Electric-hydraulic servo system |
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Patent Citations (7)
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| JP2005140175A (en) * | 2003-11-04 | 2005-06-02 | Toyooki Kogyo Co Ltd | Hydraulic drive |
| CN2725598Y (en) * | 2004-09-14 | 2005-09-14 | 中国石油天然气集团公司 | High performance electrohydraulic servo controller |
| CN201496562U (en) * | 2009-09-10 | 2010-06-02 | 江南阀门有限公司 | Built-in oil cylinder structure of piston type axial-flow valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584000A (en) * | 2017-10-17 | 2018-01-16 | 柳州北斗星液压科技有限公司 | A kind of more siphunculus formation systems and method |
| CN108407383A (en) * | 2018-02-12 | 2018-08-17 | 佛山市宏德机器制造有限公司 | A kind of hydraulic press piston closed-loop control system |
| CN108931077A (en) * | 2018-06-13 | 2018-12-04 | 重庆美的通用制冷设备有限公司 | Control method, control device and the electronic equipment of oil pressure differential regulating valve |
| CN111649933A (en) * | 2020-06-11 | 2020-09-11 | 宁波世纪恒祥自控技术有限公司 | Universal calibration system and calibration method for slide valve |
| CN112327951A (en) * | 2020-12-04 | 2021-02-05 | 中国船舶工业集团公司第七0八研究所 | Automatic flow control system for water pump hydraulic performance test bed |
| CN113236615A (en) * | 2021-04-07 | 2021-08-10 | 华南理工大学 | Hydraulic vibration hammer starting control system and implementation method thereof |
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| CN105298966B (en) | 2017-05-03 |
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Denomination of invention: A control method of piston control valve used in monitoring and control system of piston control valve Effective date of registration: 20200911 Granted publication date: 20170503 Pledgee: Wenzhou Financing Guarantee Co.,Ltd. Pledgor: JIANGNAN VALVE Co.,Ltd. Registration number: Y2020990001107 |
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Date of cancellation: 20220926 Granted publication date: 20170503 Pledgee: Wenzhou Financing Guarantee Co.,Ltd. Pledgor: JIANGNAN VALVE Co.,Ltd. Registration number: Y2020990001107 |