CN102297282A - Online zeroing method for proportional valve - Google Patents
Online zeroing method for proportional valve Download PDFInfo
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- CN102297282A CN102297282A CN2010102092669A CN201010209266A CN102297282A CN 102297282 A CN102297282 A CN 102297282A CN 2010102092669 A CN2010102092669 A CN 2010102092669A CN 201010209266 A CN201010209266 A CN 201010209266A CN 102297282 A CN102297282 A CN 102297282A
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Abstract
The invention provides an online zeroing method for a proportional valve. In the method, online accurate zeroing is realized by feeding back a position state signal of a main valve core by using a proportional valve control system and judging whether the valve core undergoes zero drift. The zero point of the valve is adjusted through the position feedback signal of the main valve core, so that the proportional valve can work close to a real zero point regardless of the offset of the natural zero point of a return spring of the proportional valve, signal errors caused by mechanical deformation of the spring in the conventional method are avoided, the working stability of the proportional valve is ensured, online debugging is realized, the maintenance load is lowered, investment and purchase of special debugging equipment are not required, adjusting and testing time can be saved by 8 hours every time, and the down time can be reduced by 48 hours all the year around.
Description
Technical field
The invention belongs to instrument and apparatus adjustment method field, relate in particular to a kind of method that is used for the online zeroing of seamless factory's continuous mill core rod hydraulic back-up roll Proportional valve.
Background technique
Proportional valve generally all is applied on the important quality control system, is the key link of end product quality control.The quality of its working state directly has influence on the quality index of product.Quality of production accident very easily takes place in Proportional valve under bad working state, bring about great losses to enterprise.The core rod support roller of seamless factory continuous mill adopts Proportional valve dicyclo feedback control system, and the adjusting method at zero point of Proportional valve is based on the position of Proportional valve spool feedback rod and regulates, and Returnning spring is adjusted the natural zero point under no stressing conditions.But the fatal shortcoming of this method is: if spring mechanical bias takes place at zero point, also be offset electric zero point, thereby cause the Proportional valve job insecurity.In addition, the Proportional valve zeroing needs to carry out in the laboratory, and needs to regulate by specialized equipment.Therefore, the Proportional valve processing of must rolling off the production line, in case Proportional valve can't proper functioning, then whole system is all wanted the stopping production maintenance of long period, has a strong impact on carrying out smoothly of production.
Summary of the invention
Purpose of the present invention is intended to overcome above-mentioned defective, and then provides a kind of method simple, easy to operate, can online accurate judgement valve element position, avoid the Proportional valve adjusting zero method of signal errors.
The concrete solution that the present invention taked is:
The online adjusting zero method of a kind of Proportional valve, proportion of utilization valve control system be to the position state signal of main valve plug feedback, judges whether zero shift of spool, thereby realize online accurate zeroing.
Its concrete steps and method are:
1, whole back-up roll position control system is set at closed loop control mode, opens oil hydraulic pump, make hydrovalve P mouth reach rated pressure, thereafter by the oil hydraulic pump automatic pressure regulation and remain on rated pressure.
2, add setting value by continuous-rolling system programmable logic controller (being called for short PLC), oil hydraulic cylinder cylinder bar is moved on to desired location.
3, hydrovalve is closed in the PLC instruction, with the measuring point I testing hydraulic cylinder position value of feedback of multimeter on proportional amplifier plate I, at measuring point II testing hydraulic cylinder position setting value, adjusts the PLC setting value then, and the two equates to make value of feedback and setting value.
4, multimeter is moved on the measuring point III that measures valve element position proportional amplifier plate II, test out the valve element position value of feedback of measuring point III with multimeter, adjust the spool zero-regulator resistor, making the spool value of feedback is zero; Close oil hydraulic pump then, regulate for the first time and finish.
5, open oil hydraulic pump again, certain interval of time continues to observe the spool feedback signal, if the non-vanishing value of hydrovalve feedback signal is then adjusted once more, is zero until the hydrovalve feedback signal, and adjusting finishes.
Compared with prior art, beneficial effect of the present invention is:
Owing to adjust the zero point of valve by the position feed back signal of main valve plug, therefore no matter whether be offset the natural zero point of Proportional valve Returnning spring, all the time can guarantee that Proportional valve was operated near true zero point, overcome the signal errors that conventional method forms owing to the mechanically deformation of spring, thereby guaranteed the stability of Proportional valve work.And realized online field adjustable, avoided repeatedly removing and installing of Proportional valve, reduced maintenance load; need not investment and purchase special-purpose commissioning device; can save at every turn and adjust and 8 hours test times, can reduce 48 hours dead times the whole year, guarantee the direct motion of producing.
Description of drawings
Accompanying drawing is a Proportional valve feedback structure schematic representation.
Among the figure: 1-continuous-rolling system programmable logic controller is PLC, 2-measuring point II, 3-measuring point I, 4-proportional amplifier plate I, 5-proportional amplifier plate II, 6-power amplifier, 7-oil hydraulic cylinder, 8-positioning control sensor, the 9-hydrovalve, 10-oil hydraulic pump, 11-measuring point III, 12-zero-regulator resistor.
Embodiment
Below, the present invention will be further described in conjunction with the accompanying drawings.
By accompanying drawing as seen, whole Proportional valve feedback control system mainly is to be that PLC1, proportional amplifier plate I4, proportional amplifier plate II5, power amplifier 6, oil hydraulic cylinder 7, sensor 8, hydrovalve 9 and oil hydraulic pump 10 are constituted by the continuous-rolling system programmable logic controller.Proportional amplifier plate I4 mainly is responsible for oil hydraulic cylinder cylinder bar positioning control; Proportional amplifier plate II5 then is responsible for the proportional valve spool positioning control.Be respectively equipped with measuring point II2 and measuring point I3 on proportional amplifier plate I4, proportional amplifier plate II5 is provided with measuring point III11, and inside is provided with zero-regulator resistor 12.Sensor 8 is responsible for the cylinder bar position feedback of the oil hydraulic cylinders 7 that will receive and is given the proportional amplifier plate I4 that is responsible for oil hydraulic cylinder cylinder bar positioning control, by power amplifier 6 with proportional amplifier plate II5 and sensor 8 is carried and the signal of feedback carries out outputing to hydrovalve 9 again after the power amplification.
The online adjusting zero method of the present invention's Proportional valve mainly is the proportion of utilization valve control system to the position state signal feedback of main valve plug, judges whether zero shift of spool, thereby realizes online accurate zeroing.Because under the normal state, spool was to be in zero-bit when each mouthful of Proportional valve closed, and leakage a little P mouth and T mouth between can occur at the engagement edge of spool and valve body this moment, this leakage be called Proportional valve in let out.Spool can not cause main valve plug slowly to move to a side of low fuel pressure (oil mass is few) in zero-bit; If spool is in zero-bit, then the left chamber of main valve identical with right ventricle's oil pressure (oil mass is identical), it is motionless that main valve plug is in neutral position (zero point).
Just be based on above-mentioned consideration, the present invention amplifies plate zero point by resize ratio, impels spool to be in dead-center position.Its concrete steps and method are:
1, whole back-up roll position control system is set at closed loop control mode, opens oil hydraulic pump 10, make the P mouth of hydrovalve 9 reach rated pressure, thereafter by the oil hydraulic pump automatic pressure regulation and remain on rated pressure.
2, add setting value by tandem rolling PLC1, oil hydraulic cylinder 7 cylinder bars are moved on to desired location.
3, hydrovalve 9 is closed in the PLC instruction, and with measuring point I3 test fluid cylinder pressure 9 location feedback value of multimeter on proportional amplifier plate I4, test fluid cylinder pressure 9 position setting values are adjusted the PLC setting value then on measuring point II2, and the two equates to make value of feedback and setting value.
4, multimeter is moved on the measuring point III11 of the proportional amplifier plate II5 that measures valve element position, test out the valve element position value of feedback of measuring point III11 with multimeter, adjust spool zero-regulator resistor 12, making the spool value of feedback is zero; Close oil hydraulic pump then, regulate for the first time and finish.
5, opening oil hydraulic pump 10 again, continue inspecting valve core feedback signal behind the certain interval of time, if the non-vanishing value of the feedback signal of hydrovalve 9 is then adjusted once more, is zero until the feedback signal of hydrovalve 9, and adjusting finishes.
Claims (1)
1. the online adjusting zero method of Proportional valve is characterized in that, the proportion of utilization valve control system is to the position state signal of main valve plug feedback, judges whether zero shift of spool, thereby realizes online accurate zeroing; Its concrete steps and method are:
(1), whole back-up roll position control system is set at closed loop control mode, open oil hydraulic pump, make hydrovalve P mouth reach rated pressure, thereafter by the oil hydraulic pump automatic pressure regulation and remain on rated pressure;
(2), be that PLC adds setting value by the continuous-rolling system programmable logic controller, oil hydraulic cylinder cylinder bar is moved on to desired location;
(3), PLC instruction closes hydrovalve, with the measuring point I testing hydraulic cylinder position value of feedback of multimeter on proportional amplifier plate I, at measuring point II testing hydraulic cylinder position setting value, adjusts the PLC setting value then, the two equates to make value of feedback and setting value;
(4), multimeter is moved on the measuring point III that measures valve element position proportional amplifier plate II, test out the valve element position value of feedback of measuring point III with multimeter, adjust the spool zero-regulator resistor, making the spool value of feedback is zero, close oil hydraulic pump then, regulate for the first time and finish;
(5), again open oil hydraulic pump, certain interval of time continues to observe the spool feedback signal, if the non-vanishing value of hydrovalve feedback signal is then adjusted once more, is zero until the hydrovalve feedback signal, and adjusting finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102092669A CN102297282A (en) | 2010-06-25 | 2010-06-25 | Online zeroing method for proportional valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102092669A CN102297282A (en) | 2010-06-25 | 2010-06-25 | Online zeroing method for proportional valve |
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| CN102297282A true CN102297282A (en) | 2011-12-28 |
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| CN2010102092669A Pending CN102297282A (en) | 2010-06-25 | 2010-06-25 | Online zeroing method for proportional valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763698A (en) * | 2014-01-08 | 2015-07-08 | 佛山市恒力泰机械有限公司 | Automatic adjusting method for valve element zero position of moving beam proportional valve of ceramic brick machine |
| CN108425791A (en) * | 2018-02-05 | 2018-08-21 | 中国长江电力股份有限公司 | Position diagnosis and intelligent method for correcting error automatically in real time in a kind of governor main distribution gas |
| CN109944838A (en) * | 2019-04-09 | 2019-06-28 | 鞍钢股份有限公司 | A kind of online adjusting zero method of servo valve mechanical zero |
| CN113446287A (en) * | 2021-06-23 | 2021-09-28 | 河南航天液压气动技术有限公司 | Machine learning algorithm-based 2D reversing valve automatic zero setting system and method |
| CN114183334A (en) * | 2021-11-03 | 2022-03-15 | 内蒙古北方重工业集团有限公司 | Method for suppressing zero drift in debugging of amplification plate of radial plunger pump |
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| CN101672311A (en) * | 2009-09-24 | 2010-03-17 | 中冶赛迪工程技术股份有限公司 | Multi-hydraulic cylinder synchronization control method |
| CN101737371A (en) * | 2010-02-09 | 2010-06-16 | 浙江工业大学 | Zero maintaining mechanism of 2D digital servo valve |
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| US3184913A (en) * | 1963-11-18 | 1965-05-25 | Ford Motor Co | Control system for infinitely variable power transmission mechanism |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763698A (en) * | 2014-01-08 | 2015-07-08 | 佛山市恒力泰机械有限公司 | Automatic adjusting method for valve element zero position of moving beam proportional valve of ceramic brick machine |
| CN108425791A (en) * | 2018-02-05 | 2018-08-21 | 中国长江电力股份有限公司 | Position diagnosis and intelligent method for correcting error automatically in real time in a kind of governor main distribution gas |
| CN111365187A (en) * | 2018-02-05 | 2020-07-03 | 中国长江电力股份有限公司 | Speed regulator main distribution gas neutral position real-time automatic diagnosis and intelligent deviation rectification method |
| CN111365187B (en) * | 2018-02-05 | 2021-09-17 | 中国长江电力股份有限公司 | Speed regulator main distribution gas neutral position real-time automatic diagnosis and intelligent deviation rectification method |
| CN109944838A (en) * | 2019-04-09 | 2019-06-28 | 鞍钢股份有限公司 | A kind of online adjusting zero method of servo valve mechanical zero |
| CN113446287A (en) * | 2021-06-23 | 2021-09-28 | 河南航天液压气动技术有限公司 | Machine learning algorithm-based 2D reversing valve automatic zero setting system and method |
| CN113446287B (en) * | 2021-06-23 | 2024-01-05 | 河南航天液压气动技术有限公司 | Automatic zeroing system and method for 2D reversing valve based on machine learning algorithm |
| CN114183334A (en) * | 2021-11-03 | 2022-03-15 | 内蒙古北方重工业集团有限公司 | Method for suppressing zero drift in debugging of amplification plate of radial plunger pump |
| CN114183334B (en) * | 2021-11-03 | 2024-03-29 | 内蒙古北方重工业集团有限公司 | Method for debugging and inhibiting zero drift of radial plunger pump amplification plate |
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Application publication date: 20111228 |