CN103757968B - A kind of dilution water for head box controls the intelligent actuator of paper cross direction ration - Google Patents
A kind of dilution water for head box controls the intelligent actuator of paper cross direction ration Download PDFInfo
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- CN103757968B CN103757968B CN201410013126.2A CN201410013126A CN103757968B CN 103757968 B CN103757968 B CN 103757968B CN 201410013126 A CN201410013126 A CN 201410013126A CN 103757968 B CN103757968 B CN 103757968B
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Abstract
The invention discloses the intelligent actuator that a kind of dilution water for head box controls paper cross direction ration, the dilution water valve of this actuator is connected by shaft coupling with the output shaft lower end of reduction box; Stepper motor adopts double output shaft structure, and its front output shaft end is arranged on the input of reduction box; Reduction box comprises two pairs of transmissions, and the Spur Gear Driving be made up of gear wheel and pinion for a pair is secondary, and another is secondary to the Worm and Worm Gear Driving be made up of worm and worm wheel; Worm gear is arranged on the output shaft of reduction box, and the casing of reduction box arranges banking pin, and worm gear arranges 90 degree of mechanical position limitation grooves, 0 degree of position of the corresponding dilution water valve of lower mechanical position limitation, 90 degree of positions of the corresponding dilution water valve of upper mechanical position limitation.Intelligent actuator of the present invention can accurately control to dilute the dilution water yield that adds of water valve, and the minimum space distance control of dilution water is less than 60mm, ensures the accurate control of paper local cross direction ration, improves quality of paper products.
Description
Technical field
The present invention relates to pulp and paper technology field, particularly relate to a kind of for regulating local slurry concentration to control the dilution water valve actuator of the head box of page horizontal quantification distribution by dilution water in paper machine, be specifically related to the dilution water intelligent actuator based on CAN, adapt to high speed paper machine to the control overflow of paper cross direction ration.
Background technology
For the control of paper cross direction ration, the nineties middle and later periods in last century, the companies such as U.S. Beloit, German Voith are proposed the head box that dilution water controls paper cross direction ration, on the slurry banner of head box, be divided into several subregions, different subregion adds dilution water respectively, regulate the slurry concentration of subregion, thus the over dry changing this subregion is quantitative, reaches the object reducing paper cross direction ration difference.This method overcomes that old-fashioned lip mechanical fine adjustment device degree of regulation is poor, adjacent adjustment points influences each other larger shortcoming greatly, makes page quantitative difference of banner reduce to less than 1%, and governing speed is faster, the reaction time is shorter.
The method of traditional adjustment headbox dilution water addition has manual site to regulate and pneumatic or motorized adjustment two kinds of methods.
Manual site's control method is the experience according to operating personnel, and the dilution water valve of the corresponding subregion of artificial manual adjustments, change the dilution water yield of corresponding subregion, thus the over dry changing corresponding subregion is quantitative.The method that manual site regulates has the following disadvantages: the poor real of adjustment quantitative, and lag time is long, comparatively large by operating personnel's experience influence factor, can only as a kind of adjustment cross direction ration means roughly.
Pneumatic or motorized adjustment method adopts generally pneumatic or electric control valve to change the dilution water of subregion.This pneumatic or electric control valve be substantially all by 4 ?the analog quantity of 20mA carry out the aperture of control valve, and valve opening is not generally closed-loop control, or the position adopting analog quantity to detect valve realizes the closed-loop control of valve opening, accurately cannot control the aperture of dilution water valve, control accuracy is low.Because a head box has tens usually to up to a hundred dilution water valves, adopt the valve that this non-bus controls, wiring is many, and fault rate is high, poor anti-interference, cannot meet the control overflow of high speed paper machine to paper cross direction ration.
There are Honywell company, Metso company, Voith company etc. in the dilution water intelligent actuator producer producing head box in the world, precision and better performances, but expensive, only has the high-grade paper machine of minority import to use at home.
Summary of the invention
In order to overcome the deficiencies in the prior art, solving the expensive problem of import intelligent actuator, the invention provides the intelligent actuator that a kind of precision is high, good stability, the functional dilution water for head box by force control paper cross direction ration.
Object of the present invention is achieved through the following technical solutions:
Dilution water for head box controls an intelligent actuator for paper cross direction ration, primarily of CAN controller, stepper motor, dilution water position sensor of valve, reduction box and dilution water valve; Dilution water valve is connected by shaft coupling with the output shaft lower end of reduction box; Dilution water valve position indicator is connected with the output shaft upper end of reduction box; Stepper motor adopts double output shaft structure, and its front output shaft end is arranged on the input of reduction box; Dilution water position sensor of valve is arranged on the rear output shaft of stepper motor; CAN controller is connected with stepper motor and dilution water position sensor of valve; Reduction box comprises two pairs of transmissions, and the Spur Gear Driving be made up of gear wheel and pinion for a pair is secondary, and another is secondary to the Worm and Worm Gear Driving be made up of worm and worm wheel; Worm gear is arranged on the output shaft of reduction box, and the casing of reduction box arranges banking pin, and worm gear arranges 90 degree of mechanical position limitation grooves, 0 degree of position of the corresponding dilution water valve of lower mechanical position limitation, 90 degree of positions of the corresponding dilution water valve of upper mechanical position limitation.
Preferably, described intelligent actuator also comprises dilution water valve position indicator, and dilution water valve position indicator is connected with the output shaft upper end of reduction box.
Described dilution water position sensor of valve adopts optical encoder.
Described CAN controller, stepper motor, dilution water position sensor of valve, reduction box are all arranged in shell.
Described CAN controller is connected by cable with stepper motor and dilution water position sensor of valve.
Described actuator Breadth Maximum is less than or equal to 59mm.
The actuator automatic backlash compensating module of described CAN controller, CAN communication module, parameter memory module, valve location power-fail memory function module, valve automatic calibration module, fault alarm self diagnosis module, driving stepper motor module are connected with DSP microprocessor respectively with valve location closed loop feedback module; Described driving stepper motor module is rotated according to the order-driven stepper motor that DSP microprocessor is given; Described valve location closed loop feedback module is connected with optical encoder cable, and valve location closed loop feedback module receives the data of dilution water position sensor of valve, data is delivered to DSP microprocessor, carries out the control of valve location closed loop feedback; Described parameter memory module is for storing the characterisitic parameter of the controling parameters of actuator and stepper motor, dilution water position sensor of valve, reduction box; The rotate backward gap error of described automatic backlash compensating module to actuator carries out auto-compensation; Described valve automatic calibration module detects the lower mechanical position limitation of reduction box automatically, and demarcating dilution water valve is 0 degree in this position; The upper mechanical position limitation of automatic detection reduction box, demarcating dilution water valve is 90 degree in this position; The actual location data of dilution water valve is preserved at actuator shutdown transient by described valve location power-fail memory function module, the dilution water valve location date restoring will preserved when actuator re-powers; Described CAN communication module receives the given dilution water valve opening data of paper cross direction ration control system, and the actual open position data of dilution water valve and the alert data of actuator are sent to paper cross direction ration control system; Each module operational factor of described fault alarm self diagnosis module Real-Time Monitoring CAN controller, when parameter reaches presetting alarming value, this alert data is sent to paper cross direction ration control system by CAN communication module and carries out troubleshooting.
Relative to prior art, tool of the present invention has the following advantages and beneficial effect:
Intelligent actuator of the present invention adopts full-digital control, driving stepper motor, valve location closed loop feedback, actuator automatic backlash compensates, can accurately control to dilute the dilution water yield that adds of water valve, and the minimum space distance control of dilution water is less than 60mm, ensures the accurate control of paper local cross direction ration, effective to improve the horizontal overall situation of paper quantitatively poor, improves quality of paper products; Intelligent actuator of the present invention also has dilution water valve location power failure memory function and dilution water valve zero offset capability, saves a large amount of manpowers and time, and convenient composition CAN network, improves the reliability of control system simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural facades schematic diagram of intelligent actuator controlling paper cross direction ration for the dilution water of head box.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is CAN controller 3 high-level schematic functional block diagram of Fig. 1.
Fig. 4 is that intelligent actuator controls workflow diagram.
Detailed description of the invention
For understanding the present invention further, below in conjunction with accompanying drawing, the invention will be further described, it should be noted that, detailed description of the invention is not construed as limiting the scope of protection of present invention.
As shown in Figure 1, dilution water for head box controls an intelligent actuator for paper cross direction ration, forms primarily of CAN controller 3, stepper motor 4, dilution water position sensor of valve 5, reduction box 6, dilution water valve 7, dilution water valve position indicator 1, shell 2.Dilution water valve 7 is connected by shaft coupling with the output shaft lower end of reduction box 6; Dilution water valve location instruction 1 is connected with the output shaft upper end of reduction box 6; Stepper motor 4 adopts double output shaft structure, and its front output shaft end is arranged on the input of reduction box 6; Dilution water position sensor of valve 5 is arranged on the rear output shaft of stepper motor 4; CAN controller 3, stepper motor 4, dilution water position sensor of valve 5, reduction box 6, dilution water valve position indicator 1 are all arranged on inside shell 2; CAN controller 3 is connected by cable with stepper motor 4 and dilution water position sensor of valve 5; CAN controller 3 control step motor 4 rotates, and stepper motor 4 drives reduction box 6 to rotate, and reduction box 6 output shaft drives dilution water valve 7 to rotate.Dilution water valve position indicator 1 is connected with the output shaft upper end of reduction box 6, can show the position of current dilution water valve on actuator, and handled easily personnel on site checks.
Fig. 2 shows the profile of intelligent actuator, and as shown in Figure 2, intelligent actuator Breadth Maximum is less than or equal to 59mm; Reduction box 6 comprises two pairs of transmissions, and the Spur Gear Driving be made up of gear wheel 8 and pinion 9 for a pair is secondary, and another is secondary to the Worm and Worm Gear Driving be made up of worm screw 10 and worm gear 11; Worm gear 11 is arranged on the output shaft of reduction box 6, and the output of reduction box 6 has auto-lock function; The casing 14 of reduction box 6 arranges banking pin 13, worm gear 11 arranges 90 degree of mechanical position limitation grooves 12,0 degree of position of the corresponding dilution water valve 7 of lower mechanical position limitation, 90 degree of positions of the corresponding dilution water valve 7 of upper mechanical position limitation.
Fig. 3 shows CAN controller 3 high-level schematic functional block diagram, as shown in Figure 3, the functional module of CAN controller 3 comprises DSP microprocessor 15, actuator automatic backlash compensating module 16, CAN communication module 17, parameter memory module 18, valve location power-fail memory function module 19, valve automatic calibration module 20, fault alarm self diagnosis module 21, driving stepper motor module 22 and valve location closed loop feedback module 23; DSP microprocessor 15 is cores of controller, and actuator automatic backlash compensating module 16, CAN communication module 17, parameter memory module 18, valve location power-fail memory function module 19, valve automatic calibration module 20, fault alarm self diagnosis module 21, driving stepper motor module 22 are connected with DSP microprocessor 15 respectively with valve location closed loop feedback module 23; Driving stepper motor module 22 is also connected with stepper motor 4, rotates according to the order-driven stepper motor 4 that DSP microprocessor 15 is given; Dilution water position sensor of valve 5 adopts optical encoder, optical encoder is arranged on the rear output shaft of stepper motor 4, for detecting the actual rotary position of stepper motor 4, thus detect the actual open position of dilution water valve 7, and the data source of closed loop feed back as dilution water valve 7 open position; Optical encoder cable is connected with valve location closed loop feedback module 23, and valve location closed loop feedback module 23 receives the data of dilution water position sensor of valve 5, data is delivered to DSP microprocessor 15, carries out the control of valve location closed loop feedback; Because the reduction box 5 in actuator exists reverse drive gap, stepper motor 4 drive reduction box 5 from forward forward to rotate backward time, the output shaft of reduction box 5 does not rotate immediately, until stepper motor 4 have rotated clearance distance after the output shaft of reduction box 5 just really rotate, affect transmission accuracy.Actuator is exported to the impact of locating to eliminate reverse drive gap, gap error value is rotated backward by manual detection actuator, this value is input to the parameter memory module 18 li storage of CAN controller 3, when actuator from forward forward to rotate backward time, actuator needs counter-rotational desired value to be added with the gap error value that rotates backward being stored in parameter memory module 18 by actuator automatic backlash compensating module 16 automatically, and additive value is rotated backward fresh target value as actuator, CAN controller 3 is pressed fresh target value with regard to control step motor 4 and is rotated, because stepper motor more than 4 have rotated gap error value, actuator just really turns to the desired value that user needs, realize actuator backlass auto-compensation, valve automatic calibration module 20 can detect the mechanical position limitation of reduction box 6 automatically, and the worm gear 11 of reduction box is provided with the stopper slot 12 of 90 degree, and banking pin 13 one end is fixed on the casing 14 of reduction box 6, and the other end is arranged on stopper slot 12 li, when stepper motor rotating forward drives worm gear 11 to rotate, the lower limit of the stopper slot 12 of worm gear 11 bumps against banking pin 13, worm gear 11 stops operating, stepper motor 4 is also passive to stop operating, the dilution water position sensor of valve 5 being arranged on stepper motor 4 does not just have data to export, valve automatic calibration module 20 detects that dilution water position sensor of valve 5 data stop, and demarcating the aperture of dilution water valve 7 in this position is 0 degree, sends instruction control step motor 4 simultaneously stop to DSP microprocessor 15.Equally when stepper motor reversion drives worm gear 11 to rotate, automatically detect the upper limit of the stopper slot 12 of worm gear 11, demarcating the aperture of dilution water valve 7 in this position is 90 degree; Valve location power-fail memory function module 19 is provided with large value capacitor, at actuator shutdown transient, the electricity that large value capacitor stores can work hold controller 5 short time, in the meantime, the current data of dilution water position sensor of valve 5 is preserved by valve location power-fail memory function module 19, also the actual open position data of dilution water valve 7 are just saved, the date restoring will preserved when actuator re-powers and initializes; Paper cross direction ration control system 24 is for On-line Control paper cross direction ration in paper making process, ensure that paper horizontal quantification is evenly distributed unanimously, mainly comprise the scanning support equipment of paper cross direction ration on-line measurement, cross direction ration control software design and actuating mechanism controls interface.The CAN communication module 17 of actuator carries out communication with the actuating mechanism controls interface of paper cross direction ration control system 24, paper cross direction ration control system 24 is according to the paper cross direction ration data of scanning support on-line measurement, calculate the addition of each subregion dilution water, obtain the aperture data of each subregion dilution water valve, and dilution water valve opening data are sent to the CAN communication module 17 of actuator by the interface of control system, control the aperture of each subregion dilution water valve 7, reach the dilution water addition that paper cross direction ration control system 24 requires, thus regulate respective partition slurry concentration, thus realize the uniformity of paper cross direction ration.After dilution water valve arrives the aperture required, the current data of dilution water position sensor of valve 5 and the alert data of actuator are sent to paper cross direction ration control system 24 by CAN communication module 17, carry out the closed-loop control of paper cross direction ration control system.Parameter memory module 18, for storing the characterisitic parameter of the controling parameters of actuator and stepper motor 4, dilution water position sensor of valve 5, reduction box 6, reads when actuator initializes, and is supplied to other module and calls.Each module operational factor of fault alarm self diagnosis module 21 Real-Time Monitoring CAN controller 3, when parameter reaches presetting alarming value, this alert data is sent to paper cross direction ration control system 24 by CAN communication module 17 and carries out troubleshooting.Intelligent actuator, owing to having CAN communication module 17, can form CAN network, and a CAN network can connect 1 to 100 intelligent actuator, and actuator is by CAN network and paper cross direction ration control system 24 communication.
Intelligent actuator of the present invention controls workflow, as shown in Figure 4, comprises normal control flow journey, automatic backlash compensates flow process, valve automatic calibration flow process and valve location power-fail memory function flow process.Actuator powers on and starts shooting and initialize, and reads controling parameters.Receive CAN data command, judge whether that carrying out valve automatic calibration still enters normal control flow journey.
Normal control flow journey: CAN receives the dilution water valve opening data that cross direction ration control system is sent here, judges that actuator rotates forward or reversion.If rotate forward, rotate according to rotating forward desired value Driving Stepping Motor, if reversion, actuator is rotated backward desired value and rotate backward gap error value with actuator and be added, obtaining actuator and rotate backward fresh target value, rotating according to rotating backward fresh target value Driving Stepping Motor.Control according to optical encoder data closed loop feedback in rotation process at stepper motor, and whether judge that optical encoder exports data normal, as abnormal, then send alarm signal, as normally, after judging that actuator turns puts in place according to the data of optical encoder output, stepper motor stop motion, CAN transmission current optical encoder data and alert data are to cross direction ration control system.
Valve automatic calibration flow process:
Actuator receives command driven stepper motor and rotates, drive reduction box worm gear wheel, optical encoder data export, after judging that data export stopping, if stepper motor rotates forward, represent that the lower limit of worm gear stopper slot bumps against banking pin, and the aperture of demarcation dilution water valve in this position is 0 degree, if stepper motor is reversion, represent that the upper limit of worm gear stopper slot bumps against banking pin, demarcating the aperture of dilution water valve in this position is 90 degree, and stepper motor stops.
Intelligent actuator of the present invention is arranged on head box, and on the cloth slurry banner of head box, be divided into several subregions, a subregion installs an intelligent actuator, changes the dilution water addition of corresponding subregion.The Breadth Maximum of actuator is 59mm, so with the transversely arranged installation actuator of the spacing distance of 59mm on the banner of head box, it is 59mm that dilution water adds spacing.
Intelligent actuator of the present invention adopts full-digital control, driving stepper motor, dilution water valve location closed loop feedback, actuator automatic backlash compensates, accurately can control the dilution water yield that dilution water valve adds, and the minimum spacing that control dilution water adds is less than 60mm, ensures the accurate control of paper local cross direction ration, effective horizontal overall situation improving paper is quantitatively poor, improves quality of paper products; Intelligent actuator of the present invention has dilution water valve location power failure memory function and dilution water valve zero offset capability, saves a large amount of manpowers and time, and convenient composition CAN network, improves the reliability of control system simultaneously.
Claims (5)
1., for an intelligent actuator for the dilution water control paper cross direction ration of head box, it is characterized in that, form primarily of CAN controller, stepper motor, dilution water position sensor of valve, reduction box and dilution water valve; Dilution water valve is connected by shaft coupling with the output shaft lower end of reduction box; Dilution water valve position indicator is connected with the output shaft upper end of reduction box; Stepper motor adopts double output shaft structure, and its front output shaft end is arranged on the input of reduction box; Dilution water position sensor of valve is arranged on the rear output shaft of stepper motor; CAN controller is connected with stepper motor and dilution water position sensor of valve; Reduction box comprises two pairs of transmissions, and the Spur Gear Driving be made up of gear wheel and pinion for a pair is secondary, and another is secondary to the Worm and Worm Gear Driving be made up of worm and worm wheel; Worm gear is arranged on the output shaft of reduction box, and the casing of reduction box arranges banking pin, and worm gear arranges 90 degree of mechanical position limitation grooves, 0 degree of position of the corresponding dilution water valve of lower mechanical position limitation, 90 degree of positions of the corresponding dilution water valve of upper mechanical position limitation;
The actuator automatic backlash compensating module of described CAN controller, CAN communication module, parameter memory module, valve location power-fail memory function module, valve automatic calibration module, fault alarm self diagnosis module, driving stepper motor module are connected with DSP microprocessor respectively with valve location closed loop feedback module; Described driving stepper motor module is rotated according to the order-driven stepper motor that DSP microprocessor is given; Described valve location closed loop feedback module is connected with optical encoder cable, and valve location closed loop feedback module receives the data of dilution water position sensor of valve, data is delivered to DSP microprocessor, carries out the control of valve location closed loop feedback; Described parameter memory module is for storing the characterisitic parameter of the controling parameters of actuator and stepper motor, dilution water position sensor of valve, reduction box; The rotate backward gap error of described automatic backlash compensating module to actuator carries out auto-compensation; Described valve automatic calibration module detects the lower mechanical position limitation of reduction box automatically, and demarcating dilution water valve is 0 degree in this position; The upper mechanical position limitation of automatic detection reduction box, demarcating dilution water valve is 90 degree in this position; The actual location data of dilution water valve is preserved at actuator shutdown transient by described valve location power-fail memory function module, the dilution water valve location date restoring will preserved when actuator re-powers; Described CAN communication module receives the given dilution water valve opening data of paper cross direction ration control system, and the actual open position data of dilution water valve and the alert data of actuator are sent to paper cross direction ration control system; Each module operational factor of described fault alarm self diagnosis module Real-Time Monitoring CAN controller, when parameter reaches presetting alarming value, is sent to paper cross direction ration control system by alert data by CAN communication module and carries out troubleshooting.
2. the dilution water for head box according to claim 1 controls the intelligent actuator of paper cross direction ration, it is characterized in that: described dilution water position sensor of valve adopts optical encoder.
3. the dilution water for head box according to claim 1 controls the intelligent actuator of paper cross direction ration, it is characterized in that: described CAN controller, stepper motor, dilution water position sensor of valve, reduction box are all arranged in shell.
4. the dilution water for head box according to claim 1 controls the intelligent actuator of paper cross direction ration, it is characterized in that: described CAN controller is connected by cable with stepper motor and dilution water position sensor of valve.
5. the dilution water for head box according to claim 1 controls the intelligent actuator of paper cross direction ration, it is characterized in that: described actuator Breadth Maximum is less than or equal to 59mm.
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| CN201410013126.2A CN103757968B (en) | 2014-01-10 | 2014-01-10 | A kind of dilution water for head box controls the intelligent actuator of paper cross direction ration |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104480769B (en) * | 2014-11-04 | 2016-08-24 | 陕西科技大学 | A kind of dilution water waterpower type flow box dilution water control valve device and control method |
| CN105508696A (en) * | 2016-02-24 | 2016-04-20 | 贵州安吉华元科技发展有限公司 | Rotary precision regulating valve and method for controlling same |
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| CN2856110Y (en) * | 2006-01-24 | 2007-01-10 | 河南省江河纸业有限责任公司 | Diluting water device of pulp flowing case |
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| CN202030978U (en) * | 2011-03-16 | 2011-11-09 | 西安维亚造纸机械有限公司 | Hydraulic pulp flowing box |
| CN203683986U (en) * | 2014-01-10 | 2014-07-02 | 华南理工大学 | Intelligent actuator for controlling paper transverse width quantification through dilution water |
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2014
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| US5549793A (en) * | 1994-08-02 | 1996-08-27 | Abb Industrial Systems, Inc. | Control of dilution lines in a dilution headbox of a paper making machine |
| CN2856110Y (en) * | 2006-01-24 | 2007-01-10 | 河南省江河纸业有限责任公司 | Diluting water device of pulp flowing case |
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