CN103161988A - High-precision proportional valve comprising angular displacement amplifying mechanism - Google Patents
High-precision proportional valve comprising angular displacement amplifying mechanism Download PDFInfo
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- CN103161988A CN103161988A CN2013100847973A CN201310084797A CN103161988A CN 103161988 A CN103161988 A CN 103161988A CN 2013100847973 A CN2013100847973 A CN 2013100847973A CN 201310084797 A CN201310084797 A CN 201310084797A CN 103161988 A CN103161988 A CN 103161988A
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Abstract
A high-precision proportional valve comprising an angular displacement amplifying mechanism comprises a valve body, wherein a valve rod of the valve body is connected with one end of an output shaft of a stepping motor through a lower coupling, a transmission shaft and an upper coupling. The stepping motor is connected with a controller, and the other end of the stepping motor is connected with a hand wheel. Sensor swing arms, a large synchronous pulley, a fully-open position detecting switch, a fully-closed position detecting switch, a forward over-travel protection switch and a reverse over-travel protection switch are arranged on the transmission shaft, wherein the large synchronous pulley is connected to a small synchronous pulley through a synchronous belt, a photoelectric encoder is arranged on the small synchronous pulley, and a data output end of the photoelectric encoder is connected with the controller. The stepping motor receives instructions from the controller and rotates, then synchronous rotation is transmitted to the valve rod through a speed reducer, the upper coupling, the transmission shaft and the lower coupling to drive a valve core to rotate, the transmission shaft amplifies angular displacement through the angular displacement amplifying mechanism, the photoelectric encoder detects angular displacement signals and transmits the angular displacement signals to the controller for carrying out feedback control on a valve position, and therefore closed-loop fine control of the valve opening can be realized, and the accuracy of the valve can be improved.
Description
Technical field
The present invention relates to a kind of valve, particularly a kind of high-precision quantitative valve that adopts the angular displacement enlarger.
Background technique
(the paper industry term refers to the parameters such as quantitative in the paper production process, moisture content, ash and thickness are detected online and control for QCS, QuanlityControl System by quality control system in the quantitative control of papermaking.) record the aperture that paper basis weight removes to control proportional valve, proportional valve both domestic and external all adopts stepper motor to drive through retarder the mode that Spool rotating is realized Flow-rate adjustment, do not detect the real opening of spool, belonging to open loop drives, for example domestic utility model patent 200620130207.1 discloses a kind of " proportional valve ", namely adopts this structure.Existing valve relies on the segmentation of stepper motor, reaches so-called 10000 steps, 50000 even higher levels of controls of step are not real, with predictability and conjecture property, because do not have after all the angular displacement of real detection valve to be used for feedback control.Because belonging to open loop, stepper motor drives, cause the valve running resistance to increase in valve long-play back valve core, valve rod or driving mechanism wearing and tearing, phenomenon that as easy as rolling off a log appearance " is lost the step ", be that drive motor has received control impuls, but motor does not rotate for a certain reason, and spool does not produce corner yet, has occurred and control impuls inconsistent location situation, therefore, the precision of valve has been subject to impact.For this problem, need the proportional valve of development of new, improve the precision of valve.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the invention is to propose a kind of high-precision quantitative valve that adopts the angular displacement enlarger, the actual angle of swing that adopts technology of closed loop to detect spool feeds back to control system and carries out closed loop control, can solve simple employing stepper motor and drive " losing the step " problem that exists, effectively improve the precision of valve.
To achieve these goals, the technical solution used in the present invention is:
a kind of high-precision quantitative valve that adopts the angular displacement enlarger, comprise valve body 19, be connected with housing 16 with valve body 19, be provided with stepper motor 1 in housing 16, controller 18 is connected with stepper motor 1 by electric interfaces, stepper motor 1 output shaft one end is connected with retarder 2, the other end of stepper motor 1 output shaft is connected with handwheel 17, be connected with upper coupling 3 with retarder 2, be connected with transmission shaft 4 with upper coupling 3, be equipped with on transmission shaft 4 and synchronize the first swing arm 5-1 that rotates with it, the second swing arm 5-2 and large synchronous pulley 7, transmission shaft 4 outer installment have fully open position detecting switch 6-1, complete shut-down position detecting switch 6-2, forward overtravel switch 6-3, reverse overtravel switch 6-4, wherein fully open position detecting switch 6-1 and complete shut-down position detecting switch 6-2 are optoelectronic switch, optical axis both is spaced apart 90 degree, forward overtravel switch 6-3 and reverse overtravel switch 6-4 are the mechanical trip switch, contact pitch both is between the 90-95 degree, large synchronous pulley 7 is connected to small synchronous pulley 9 by Timing Belt 8, small synchronous pulley 9 is provided with photoelectric encoder 10, the data output end of photoelectric encoder 10 is connected with controller 18, be provided with dunnage 11 on housing 16 inwalls, transmission shaft 4 passes dunnage 11, be connected to valve rod 13 by lower coupler 12, be provided with the hard limit stoper 14 of machinery and valve opening machinery pointer 15 on transmission shaft 4, the hard limit stoper 14 of machinery comprises the hard limiting stopper 14-0 that is connected on transmission shaft 4, be outside equipped with at transmission shaft 4 and coordinate spacing pass caging bolt 14-2 with profile line 14-1 on limiting stopper and coordinate the spacing caging bolt 14-4 that opens with limiting stopper lower whorl profile 14-3, close caging bolt 14-2 and open caging bolt 14-4 and be arranged on threaded limiting board 14-5.
Described hard limiting stopper 14-0 is involute contour, and synchronizes rotation with transmission shaft 4.
Because the present invention has adopted the angular displacement enlarger, spool can be amplified in the minor rotation angular displacement of 0-90 degree, improve the feedback accuracy of photoelectric encoder, and relied on the precision corner Displacement Feedback of photoelectric encoder, realize accurate control of closed loop of valve opening; Adopt retarder slow down and increase driving torque, make dynamical stability and the moment of torsion increase of device actuator, more reliable than the dependence Design of Stepper Motor Subdivision raising valve precision that prior art is used; For causing valve, the excessive rotation that prevents spool damages; set up the electic protection of limit position; adopt technology of closed loop to detect the actual angle of swing of spool; and feed back to control system and carry out closed loop control, therefore can solve well " losing the step " problem that adopts stepper motor to drive and exist by simple.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is switching group structural representation of the present invention.
Fig. 3 is switching group electrical connection schematic diagram of the present invention.
Fig. 4 is the hard limit stoper work schematic diagram of valve of the present invention machinery under the complete shut-down location status.
Fig. 5 is the hard limit stoper work schematic diagram of valve of the present invention machinery under the fully open position state.
Fig. 6 is loop control theory figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, structural principle of the present invention and working principle are described in further detail.
referring to Fig. 1, Fig. 2, Fig. 4, Fig. 5, a kind of high-precision quantitative valve that adopts the angular displacement enlarger, comprise valve body 19, be connected with housing 16 with valve body 19, be provided with stepper motor 1 in housing 16, controller 18 is connected with stepper motor 1 by electric interfaces, stepper motor 1 output shaft one end is connected with retarder 2, the other end of stepper motor 1 output shaft is connected with handwheel 17, in order to manual regulating valve under off-position, be connected with upper coupling 3 with retarder 2, be connected with transmission shaft 4 with upper coupling 3, be equipped with on transmission shaft 4 and synchronize the first swing arm 5-1 that rotates with it, the second swing arm 5-2 and large synchronous pulley 7, transmission shaft 4 outer installment have fully open position detecting switch 6-1, complete shut-down position detecting switch 6-2, forward overtravel switch 6-3, reverse overtravel switch 6-4, wherein fully open position detecting switch 6-1 and complete shut-down position detecting switch 6-2 are optoelectronic switch, optical axis both is spaced apart 90 degree, forward overtravel switch 6-3 and reverse overtravel switch 6-4 are the mechanical trip switch, contact pitch both is between the 90-95 degree, large synchronous pulley 7 is connected to small synchronous pulley 9 by Timing Belt 8, small synchronous pulley 9 is provided with photoelectric encoder 10, the data output end of photoelectric encoder 10 is connected with controller 18, be provided with dunnage 11 on housing 16 inwalls, transmission shaft 4 passes dunnage 11, be connected to valve rod 13 by lower coupler 12, be provided with the hard limit stoper 14 of machinery and valve opening machinery pointer 15 on transmission shaft 4, valve opening machinery pointer 15 is in order to show valve opening, the hard limit stoper 14 of machinery comprises the hard limiting stopper 14-0 that is connected on transmission shaft 4, be outside equipped with at transmission shaft 4 and coordinate spacing pass caging bolt 14-2 with profile line 14-1 on limiting stopper and coordinate the spacing caging bolt 14-4 that opens with limiting stopper lower whorl profile 14-3, close caging bolt 14-2 and open caging bolt 14-4 and be arranged on threaded limiting board 14-5.Hard limiting stopper 14-0 is involute contour, and synchronizes rotations with transmission shaft 4, the degree of depth that can be screwed into by adjusting bolt, thereby the position of adjusting mechanical position limitation.
Referring to Fig. 1, Fig. 6, working principle of the present invention is:
Turn to the position of fully open position detecting switch 6-1 as the first swing arm 5-1, fully open position detecting switch 6-1 action, signaling to controller 18 represents that valve position arrives fully open position; Turn to the position of complete shut-down position detecting switch 6-2 as the second swing arm 5-2, complete shut-down position detecting switch 6-2 action arrives the complete shut-down position to the controller 18 expression valve position of signaling.
Referring to accompanying drawing 3; cross the position of standard-sized sheet and complete shut-down when spool and continued rotation; the end that 24V controls power supply by forward overtravel switch 6-3 be connected coil one end of an auxiliary reclay in normally-closed contact and the controller 18 of overtravel switch 6-4 and be connected, a pair of normally opened contact of auxiliary reclay is connected on the contactor coil of stepper motor 1.If the second swing arm 5-2 touches one of lower forward excess of stroke position limit switch 6-3 and reverse excess of stroke position limit switch 6-4 in rotary course, the normally-closed contact of position limit switch disconnects, cut off the power supply of auxiliary reclay, auxiliary reclay disconnects, the a pair of normally opened contact of auxiliary reclay disconnects, and disconnects the power supply of ac contactor coil, cuts off the step actuator power supply after A.C. contactor disconnects, stepper motor can not be rotated further, and has prevented the excessive rotation of spool.Excess of stroke disengage button is installed in controller 18; one end of excess of stroke disengage button connects the 24V positive source; the other end directly stride across forward excess of stroke position limit switch 6-3 and oppositely the normally-closed contact of excess of stroke position limit switch 6-4 be connected to an end of auxiliary reclay coil; if excess of stroke outage has occured in valve, press excess of stroke disengage button, connect the 24V power supply; the conducting of auxiliary reclay coil; the drive power supply of stepper motor 1 is connected, manually carried out reversing motion, remove electric overtravel protection.
Referring to Fig. 4, valve is at the complete shut-down location status, if valve continues to the direction rotation that closes, the upper profile line 14-1 of limiting stopper can meet pass caging bolt 14-2, will stop being rotated further of valve; Referring to Fig. 5, valve is at the fully open position state, if valve continues to the direction rotation that closes, the lower whorl profile 14-3 of limiting stopper can encounter and holds caging bolt 14-4, will stop being rotated further of valve.
Embodiment one:
Large synchronous pulley 7 and small synchronous pulley 9 gear ratios are 3:1, the angle range of transmission shaft 4 is the 0-90 degree, strict Synchronous Transmission through Timing Belt 8, the angle range of transmission shaft 4 is amplified to the 0-270 degree, the roll angle inspection scope of photoelectric encoder 10 is the 0-270 degree, the corner that transmission shaft 4 occurs 1 " corner, photoelectric encoder 10 produces 3 " has improved the Angular Displacement Detecting precision.
Embodiment two:
Large synchronous pulley 7 and small synchronous pulley 9 gear ratios are N:1, the angle range of transmission shaft 4 is the 0-90 degree, strict Synchronous Transmission through Timing Belt 8, the N that the angle range of transmission shaft 4 is amplified to the transmission shaft corner doubly, transmission shaft 4 occurs 1 " corner; photoelectric encoder 10 produces N " corner, improved the Angular Displacement Detecting precision.
Claims (2)
1. high-precision quantitative valve that adopts the angular displacement enlarger, comprise valve body (19), it is characterized in that, be connected with housing (16) with valve body (19), be provided with stepper motor (1) in housing (16), controller (18) is connected with stepper motor (1) by electric interfaces, stepper motor (1) output shaft one end is connected with retarder (2), the other end of stepper motor (1) output shaft is connected with handwheel (17), be connected with upper coupling (3) with retarder (2), be connected with transmission shaft (4) with upper coupling (3), be equipped with on transmission shaft (4) and synchronize first swing arm (5-1) of rotating with it, the second swing arm (5-2) and large synchronous pulley (7), transmission shaft (4) outer installment has fully open position detecting switch (6-1), complete shut-down position detecting switch (6-2), forward overtravel switch (6-3), reverse overtravel switch (6-4), wherein fully open position detecting switch (6-1) and complete shut-down position detecting switch (6-2) are optoelectronic switch, optical axis both is spaced apart 90 degree, forward overtravel switch (6-3) and reverse overtravel switch (6-4) are the mechanical trip switch, contact pitch both is between the 90-95 degree, large synchronous pulley (7) is connected to small synchronous pulley (9) by Timing Belt (8), small synchronous pulley (9) is provided with photoelectric encoder (10), the data output end of photoelectric encoder (10) is connected with controller (18), be provided with dunnage (11) on housing (16) inwall, transmission shaft (4) passes dunnage (11), be connected to valve rod (13) by lower coupler (12), be provided with the hard limit stoper (14) of machinery and valve opening machinery pointer (15) on transmission shaft (4), the hard limit stoper (14) of machinery comprises the hard limiting stopper (14-0) that is connected on transmission shaft (4), be outside equipped with at transmission shaft (4) and coordinate spacing pass caging bolt (14-2) with profile line (14-1) on limiting stopper and coordinate the spacing caging bolt (14-4) of opening with limiting stopper lower whorl profile (14-3), close caging bolt (14-2) and open caging bolt (14-4) and be arranged on threaded limiting board (14-5).
2. a kind of high-precision quantitative valve that adopts the angular displacement enlarger according to claim 1, is characterized in that, described hard limiting stopper (14-0) is involute contour, and synchronize rotation with transmission shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013100847973A CN103161988A (en) | 2013-03-15 | 2013-03-15 | High-precision proportional valve comprising angular displacement amplifying mechanism |
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| CN2013100847973A CN103161988A (en) | 2013-03-15 | 2013-03-15 | High-precision proportional valve comprising angular displacement amplifying mechanism |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020453A (en) * | 2015-06-02 | 2015-11-04 | 山东琅卡博能源科技股份有限公司 | Intelligent and dynamic controller for thermostat valve |
| CN106370250A (en) * | 2016-08-17 | 2017-02-01 | 金卡高科技股份有限公司 | Device for detecting valve opening in-place of gas meter based on photoelectric reflection technology |
| CN106959089A (en) * | 2017-04-13 | 2017-07-18 | 陕西科技大学 | A kind of valve drive gap measurement apparatus, measuring method and compensation method |
| CN107765717A (en) * | 2016-08-19 | 2018-03-06 | 北京普源精电科技有限公司 | The six-way valve control method and system of Ultra Performance Liquid Chromatography instrument |
| CN108147151A (en) * | 2017-12-14 | 2018-06-12 | 华南理工大学 | A kind of arc-shaped movement device for supplying for switching limiting |
| CN108526436A (en) * | 2018-06-21 | 2018-09-14 | 深汕特别合作区力劲科技有限公司 | A kind of injection control device and die casting machine |
| CN109149517A (en) * | 2018-10-31 | 2019-01-04 | 国家电网有限公司 | Electromagnetic valve protector, the system and method for forceful electric power power supply |
| CN113464704A (en) * | 2020-03-30 | 2021-10-01 | 金乡县海阔天空智能科技有限公司 | Freezer liquid ammonia valve control device |
| CN114543735A (en) * | 2022-02-21 | 2022-05-27 | 厦门乃尔电子有限公司 | Testing device of angular displacement sensor |
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| CN102777615A (en) * | 2012-07-27 | 2012-11-14 | 内蒙古工业大学 | Flow control valve |
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| US20040108480A1 (en) * | 2002-12-09 | 2004-06-10 | Lu-Chia Liao | Apparatus for controlling cutting fluid of processing machine |
| CN2602235Y (en) * | 2003-01-20 | 2004-02-04 | 西南石油学院 | Electric multi-path multiple change-over valve |
| CN200971996Y (en) * | 2006-10-25 | 2007-11-07 | 刘铸红 | Valve with device for controlling flow |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020453A (en) * | 2015-06-02 | 2015-11-04 | 山东琅卡博能源科技股份有限公司 | Intelligent and dynamic controller for thermostat valve |
| CN106370250A (en) * | 2016-08-17 | 2017-02-01 | 金卡高科技股份有限公司 | Device for detecting valve opening in-place of gas meter based on photoelectric reflection technology |
| CN106370250B (en) * | 2016-08-17 | 2019-09-20 | 金卡智能集团股份有限公司 | Based on the gas meter, flow meter valve opening of photoelectric reflection technology to level detecting apparatus |
| CN107765717A (en) * | 2016-08-19 | 2018-03-06 | 北京普源精电科技有限公司 | The six-way valve control method and system of Ultra Performance Liquid Chromatography instrument |
| CN107765717B (en) * | 2016-08-19 | 2021-08-06 | 北京普源精电科技有限公司 | Six-way valve control method and system of ultra-high performance liquid chromatograph |
| CN106959089B (en) * | 2017-04-13 | 2023-02-28 | 陕西科技大学 | Valve transmission clearance measuring device, measuring method and compensating method |
| CN106959089A (en) * | 2017-04-13 | 2017-07-18 | 陕西科技大学 | A kind of valve drive gap measurement apparatus, measuring method and compensation method |
| CN108147151A (en) * | 2017-12-14 | 2018-06-12 | 华南理工大学 | A kind of arc-shaped movement device for supplying for switching limiting |
| CN108526436A (en) * | 2018-06-21 | 2018-09-14 | 深汕特别合作区力劲科技有限公司 | A kind of injection control device and die casting machine |
| CN109149517A (en) * | 2018-10-31 | 2019-01-04 | 国家电网有限公司 | Electromagnetic valve protector, the system and method for forceful electric power power supply |
| CN113464704A (en) * | 2020-03-30 | 2021-10-01 | 金乡县海阔天空智能科技有限公司 | Freezer liquid ammonia valve control device |
| CN114543735A (en) * | 2022-02-21 | 2022-05-27 | 厦门乃尔电子有限公司 | Testing device of angular displacement sensor |
| CN114543735B (en) * | 2022-02-21 | 2023-11-14 | 厦门乃尔电子有限公司 | Testing device of angular displacement sensor |
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Application publication date: 20130619 |