EP0515596A1 - Automatic product feed system and process for controlling a mill roller frame. - Google Patents
Automatic product feed system and process for controlling a mill roller frame.Info
- Publication number
- EP0515596A1 EP0515596A1 EP91920198A EP91920198A EP0515596A1 EP 0515596 A1 EP0515596 A1 EP 0515596A1 EP 91920198 A EP91920198 A EP 91920198A EP 91920198 A EP91920198 A EP 91920198A EP 0515596 A1 EP0515596 A1 EP 0515596A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- feed
- product
- automatic
- analog signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/286—Feeding devices
Definitions
- the invention relates to an automatic product feed for a milling roller mill with a mechanical sensor, a product feeding device with adjustable drive means for the feed rollers and a grinding roller engagement and disengagement, as well as a method for controlling the grinding of a milling roller mill.
- the instantaneous setting of the quantity of product to be fed to the grinding rollers can basically be done in two ways, by regulating the speed of the feed rollers, or by regulating the metering gap between a metering slide and the feed roller, which is also referred to as segment adjustment.
- the grinding is recognized as the heart of every mill. A number of parameters therefore influence the quality of the grinding work. Of particular importance is the regulation of the product feed to the grinding rollers, as well as the trouble-free operation of the elements required for this.
- the level of automation in a modern mill has already reached a remarkably high level. Last but not least, in terms of quality assurance, a further increase in automation is required, at least to the extent that the parameters, which are already influenced by the device, can be exploited for even greater perfection, so that easier access is created by human intervention or the control of the process .
- the object of the invention is now to at least partially alleviate these disadvantages, that the task can be solved with or without a higher-level control, and in particular the possibility of an immediate or later integration into a higher-level computer control is possible without the need for complex conversion work.
- the device according to the invention is characterized in that it has a first mechanical signal transmitter for a digital signal and a second mechanical signal transmitter for an analog signal.
- a mechanical system is still the cheapest version compared to all other sensor technologies.
- a mechanical system is reliable and does not require any specialized training for the support.
- the new invention now allows a large number of particularly preferred configurations.
- the speed of the feed roller can be regulated via the analog signal and the engagement and disengagement can be controlled via the digital signal.
- This separation has the particular advantage that the practical setting of both the product feed control and the engagement and disengagement can be carried out independently.
- Each function is understandable and manageable.
- the drive means or a drive motor for the feed roller can be regulated continuously by the analog signal via an electrical converter unit.
- Another solution is to assign the analog signal to the control of a product feed slide and the digital signal to the engagement and disengagement.
- the control of the product feed slide (segment adjustment) can be carried out in accordance with EP-PS No. 38 054.
- the mechanically movable sensor is preferably designed in a manner known per se as a probe which extends under spring tension in the direction of the product stream to be moved (for example Christmas tree or perforated plate) and the signal transmitter as a contact element moved by the sensor.
- the probe is a contact element as a signal generator for the analog signal, respectively. for the digital signal, preferably each assigned to an outer end side of the roller mill.
- a proximity switch for converting the mechanical signal into an analog electrical signal is assigned to the signal transmitter for the analog signal, and a contact switch of an electrical valve can control the engagement and disengagement of the signal transmitter for the digital signal.
- the signal transmitter for the analog signal is directly associated with a voltage converter unit and a current converter unit, or is integrated into the roller mill.
- a frequency converter unit for regulating at least two or a plurality of feed rollers is preferably arranged at a distance from the roller mill.
- the drive motor is flanged directly to a reversing direction of rotation, both for the feed roller and for a distribution roller arranged in parallel.
- the reversing direction of rotation For this purpose, has a reduction ratio of 1: 5 to 1:20, preferably about 1:10, it being possible for the reduction and reversing gear to be formed from only three pairs of gearwheels.
- the drive motor is assigned an adjusting gear and a control unit for the selection of different speed levels of the feed rollers, and the analog signal for regulating a product feed slide valve and the engagement and disengagement are controlled via the digital signal.
- the invention further relates to an automatic product feed for a milling roller mill with a mechanical sensor, a product feed device and means for regulating the product feed, wherein an analog signal can be generated via the sensor and a mechanical signal transmitter, the automatic product feed also being a control and memory unit is assigned for different positions of an adjustment device.
- either the opening position of a feed segment is regulated via the analog signal corresponding to the product quantity fed to the roller mill, and various speed stages of the feed roller are set via the control and storage unit, or the speed of the feed rollers is set via the analog signal according to the product quantity fed to the roller mill regulated and various positions of a food segment set via the control and storage unit.
- the analog signal can e.g. A digital signal is generated via limit switches, which controls the engagement and disengagement.
- the new invention allows a control unit to use memory and computer means, which can be used in a coordinated manner with a control signal for setting the grinding gap according to a program which can be determined beforehand.
- the invention further relates to a new method for controlling the grinding of a mill roller mill, which has an adjusting device and an engagement and disengagement device for the milling rollers and a product feed on the milling rollers controlled by a product feed sensor, which is characterized in that an analog sensor is used via a mechanical sensor Signal is generated via which is regulated depending on the amount of product fed to the roller mill, and furthermore at least one independently adjustable digital signal is generated which either engages and disengages the grinding rollers or different basic settings depending on superordinate parameters (mill output, product quality) controls the product feed.
- the new invention only brought about the knowledge that the generation of an analog and an independently adjustable digital signal allows the greatest possible freedom of choice for influencing the grinding and thus for the first time enables optimum grinding conditions for each application via the parameters involved.
- each function can be guaranteed autonomously at the lowest possible level.
- Two digital signals are very particularly preferably generated, a first digital signal from the mechanical sensor controlling the engagement and disengagement of the grinding rollers as a function of the product feed, and a second digital signal generated by an independent control unit determining basic settings of the product feed.
- a certain number of revolutions can be preselected for the feed roller, or this can be adjusted at any time in the event of product changes.
- basic settings can be selected for the segment or the metering gap or adjusted when changing products.
- the product feed control takes place autonomously or automatically via the analog signal generated by the mechanical sensor.
- control unit memory Contains computer means and can be used coordinated with a control signal for setting the grinding gap according to a previously defined program.
- an optimum feed roller speed can be set depending on the grinding conditions.
- a digital unit signal from a control unit can be used to set an optimal value for the metering gap.
- Fig. 1 shows schematically the basic elements of the milling of a milling roller mill
- Fig. 2 shows an example with analog signal converter and digital contact switch
- Fig. 3 shows a particular embodiment of Fig. 1 with an electropneumatic valve for engaging and disengaging the grinding roller;
- Fig. 4 shows schematically the generation of a mechanical-electrical converter unit with a rotary potentiometer
- Fig. 5 shows schematically a transmission for the operation of the feed roller
- 6 shows an example of a feed control by pneumatic control of a segment slide and the control of different speed levels of the feed rollers
- Fig. 7 shows a section through an 8-roll mill.
- FIG. 1 shows a mill roller mill 1 which is normally built in duplicate, but only half of which is shown.
- the product is fed in via a feed cylinder 2 in a product feed area 3, which in the lower part has a distribution roller 4 and a feed roller 5 which can be brought into the same direction by a gear 6 and drive means 7.
- a mechanical sensor 8 which is directly connected in an articulated manner to a mechanical signal transmitter 9.
- the sensor 8 is held in its highest position by a clamping field 10 without a product inlet.
- the incoming product pushes the sensor 8 down, the signal generator 9 executing an analog movement or. an in itself known analog signal is transmitted to a converter unit 11.
- a feed gap 12 is formed by a segment 13, with a segment adjustment device 14 being shown schematically.
- the two basic possibilities are shown in FIG. 1, starting from the signal of the sensor 8 and a shaping device (S / R) 15 via dashed lines 16, respectively. 16 'is either influenced on the speed of the feed roller 5 or on the position of the feed segment 13.
- the material discharged in the feed roller 6 is fed to a pair of grinding rollers 18 in accordance with the arrow 17.
- the grinding roller pair consists of a fixed roller 19 and a loose roller 20.
- the loose roller 20 is assigned an engagement and disengagement device 21, which is controlled as a function of a control signal by the sensor 8 via a control line 22.
- the loose roller 20 is also assigned a flour gap setting device 23, which can be adjusted, if necessary, by hand or by means of a motor 24 and an electronic memory computer unit 25, depending on whether it is a function of the specific grinding work or the quality of the grinding material, or the throughput through the roller mill 1.
- FIG. 2 shows a preferred embodiment of FIG. 1 with further details on the control and regulation elements, two signal generators being shown, one signal generator 9 for the analog signal, which is generated by the movement or. the position of a cam plate 30 is generated and transferred via an analog signal converter 31 as an electrical analog voltage signal via a control line 32 to evaluation electronics 33. With a second signal generator 34 for a digital signal, the evaluation electronics 33 are also transferred via a contact switch 35 and a control line 36, from which a digital signal is given to the engagement and disengagement device 21 via a control line 37. The analog signal is converted in a frequency converter 38 directly for a drive motor 39, via which the speed of the feed roller 5 is regulated.
- FIG. 3 shows a further embodiment, in a somewhat simplified structure, in which case the analog signal from the analog signal converter 31 can be overridden via the digital signal for special operating positions.
- the digital signal directly controls an electro-pneumatic valve 40 which controls two pneumatic cylinders 41 and 42 for engaging and disengaging the grinding rollers.
- electro-pneumatic valve 40 which controls two pneumatic cylinders 41 and 42 for engaging and disengaging the grinding rollers.
- various basic positions (automatic manual service etc.) can be selected for the desired operating states by supplying compressed air.
- FIG. 4 the processing of the analog signal, here converted by a rotary potentiometer, is shown in a more simplified form and shows the conversion of a mechanical into an electrical analog signal.
- the tension spring 10 can be brought into different positions in this way and, depending on the specific product quality and inlet conditions, can be introduced via a tension screw 51 under different tensile stresses.
- FIG. 5 shows the very simple reduction gear, each with a gear set on the feed roller 5 and on the distribution roller 4 and only one set of overdrive rollers 60 and 61.
- This configuration has the advantage that the overdrive required for the overdrive from the feed roller to the distribution roller is simultaneously a reduction gear from a drive motor to the feed roller.
- FIG. 6 shows a further particularly advantageous embodiment for a complete self-regulation of the product feed via an analog signal and the possibility of the motor presetting of a feed roller speed stage, be it by manual input 70 via a control 71.
- a shift lever 73 and automatic adjusting means 74 are brought into one of the speed stages 1, 2, 3, 4 or 5.
- the digital signal is introduced via the controller according to external parameters.
- an analog signal is sent from the mechanical signal transmitter 9 to the controller via an analog signal converter.
- FIG. 7 shows the two halves of a milling mill with 8 rollers.
- Each sensor which is designed here as a vertical perforated plate, is assigned to a vertical half, that is to say two pairs of rollers 19/20, 19 '/ 20 1 lying one above the other.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Adjustment And Processing Of Grains (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3931/90 | 1990-12-12 | ||
CH3931/90A CH682809A5 (en) | 1990-12-12 | 1990-12-12 | Automatic product feed system, method for controlling the grinding of a Müllereiwalzenstuhles. |
PCT/CH1991/000248 WO1992010295A1 (en) | 1990-12-12 | 1991-12-05 | Automatic product feed system and process for controlling a mill roller frame |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0515596A1 true EP0515596A1 (en) | 1992-12-02 |
EP0515596B1 EP0515596B1 (en) | 1994-11-30 |
Family
ID=4266577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91920198A Expired - Lifetime EP0515596B1 (en) | 1990-12-12 | 1991-12-05 | Automatic product feed system and process for controlling a mill roller frame |
Country Status (10)
Country | Link |
---|---|
US (2) | US5361995A (en) |
EP (1) | EP0515596B1 (en) |
JP (1) | JPH0832309B2 (en) |
KR (1) | KR970001781B1 (en) |
AT (1) | ATE114503T1 (en) |
CH (1) | CH682809A5 (en) |
DE (1) | DE59103700D1 (en) |
ES (1) | ES2067959T3 (en) |
RU (1) | RU2066564C1 (en) |
WO (1) | WO1992010295A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6502773B1 (en) | 1997-06-23 | 2003-01-07 | Buhler Ag | Feed sensor system and method of operation |
JP2021514835A (en) * | 2018-05-25 | 2021-06-17 | ビューラー・アクチエンゲゼルシャフトBuehler AG | Roller mills with distributed metering and feeding equipment for roller mills, roller mills with such distributed weighing and feeding equipment, methods for crushing milled raw materials, and switchboard cabinets with cooling systems. |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH682809A5 (en) * | 1990-12-12 | 1993-11-30 | Buehler Ag | Automatic product feed system, method for controlling the grinding of a Müllereiwalzenstuhles. |
US5509612A (en) * | 1991-02-11 | 1996-04-23 | Gerteis; Paul | Process and device for the continuous shaping of particulate materials |
DE4226182A1 (en) * | 1992-08-07 | 1994-02-10 | Kloeckner Humboldt Deutz Ag | Hydraulically powered twin roller mill for granular raw materials - has feed unit with controlled flaps adjustable to suit measured gap between rollers |
US5865382A (en) * | 1997-01-24 | 1999-02-02 | Beloit Technologies, Inc. | Protection system for a wood chip destructuring device |
DE19722523A1 (en) * | 1997-05-30 | 1998-12-03 | Buehler Ag | Method and device for hydraulic-electrical gap control |
JP2003071314A (en) * | 2001-08-31 | 2003-03-11 | Kobe Steel Ltd | Hydrothermal curing equipment and method for producing hydrothermal curing granulated material |
JP2004041984A (en) * | 2002-07-15 | 2004-02-12 | Taiheiyo Cement Corp | Crushing system of plate material |
JP4599492B2 (en) * | 2003-12-09 | 2010-12-15 | 明治機械株式会社 | Grain / seed / solid resin mill |
EP1768662A2 (en) | 2004-06-24 | 2007-04-04 | Novartis Vaccines and Diagnostics, Inc. | Small molecule immunopotentiators and assays for their detection |
DE102004052084B4 (en) * | 2004-10-26 | 2016-10-27 | Bühler AG | rolling mill |
DE102007006092A1 (en) * | 2007-02-07 | 2008-08-14 | Polysius Ag | Process for comminuting regrind with a roller mill |
JP5854835B2 (en) * | 2008-07-02 | 2016-02-09 | ビューラー・アクチエンゲゼルシャフトBuehler AG | Apparatus and method for producing fine flour and / or coarse flour |
DE102008036784C5 (en) * | 2008-08-07 | 2013-06-20 | Thyssenkrupp Polysius Ag | Roller mill and method for comminution of regrind |
US8070081B2 (en) | 2009-05-14 | 2011-12-06 | Wark Rickey E | Pressure monitor for pulverizer |
JP5108855B2 (en) * | 2009-10-23 | 2012-12-26 | 明治機械株式会社 | Grain / seed / solid resin mill |
US8544774B1 (en) * | 2012-04-20 | 2013-10-01 | Metso Minerals Industries, Inc. | Roller crusher, and method of protecting a roller crusher from uncrushable objects |
JP6238044B2 (en) * | 2013-04-23 | 2017-11-29 | 株式会社サタケ | Stock level detector in milling mill |
CN105214825B (en) * | 2015-10-27 | 2017-09-01 | 张荣斌 | A kind of automatic control system and method for eight kibbler rolls |
CN105536943B (en) * | 2015-12-24 | 2018-04-10 | 山东理工大学 | One kind swollen tripe detection means of point interconnection system multi-compartment tube grinding machine and pre-swollen tripe regulation and control method |
CN105562148B (en) * | 2016-01-20 | 2018-01-16 | 福建安井食品股份有限公司 | Roller pressing and dispersing device for quick-frozen caked food |
CN107377092B (en) * | 2017-08-17 | 2019-03-26 | 中国电子科技集团公司第十八研究所 | Roll-in feed arrangement of powder |
JP6876896B2 (en) * | 2017-11-06 | 2021-05-26 | アイメックス株式会社 | Moving roll position adjustment device and roll mill equipped with this device |
TR201810955A2 (en) * | 2018-07-30 | 2018-08-27 | Alapala Makina Gida Sanayi Ve Ticaret Anonim Sirketi | A GRINDING MACHINE |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH655251A5 (en) * | 1980-04-11 | 1986-04-15 | Buehler Ag Geb | MILLING ROLLER CHAIR WITH A PRODUCT FEED CONTROL DEVICE AND METHOD FOR OPERATING THE MILLING ROLLER CHAIR. |
WO1986005416A1 (en) * | 1985-03-15 | 1986-09-25 | Gebrüder Bühler Ag | Process for the adjustment of the grinding rollers of a grain mill installation; also, a grain mill installation for carrying out the process |
CH682809A5 (en) * | 1990-12-12 | 1993-11-30 | Buehler Ag | Automatic product feed system, method for controlling the grinding of a Müllereiwalzenstuhles. |
-
1990
- 1990-12-12 CH CH3931/90A patent/CH682809A5/en not_active IP Right Cessation
-
1991
- 1991-12-05 EP EP91920198A patent/EP0515596B1/en not_active Expired - Lifetime
- 1991-12-05 US US07/910,187 patent/US5361995A/en not_active Expired - Fee Related
- 1991-12-05 JP JP4500240A patent/JPH0832309B2/en not_active Expired - Lifetime
- 1991-12-05 AT AT91920198T patent/ATE114503T1/en not_active IP Right Cessation
- 1991-12-05 KR KR1019920701899A patent/KR970001781B1/en not_active IP Right Cessation
- 1991-12-05 WO PCT/CH1991/000248 patent/WO1992010295A1/en active IP Right Grant
- 1991-12-05 DE DE59103700T patent/DE59103700D1/en not_active Expired - Fee Related
- 1991-12-05 ES ES91920198T patent/ES2067959T3/en not_active Expired - Lifetime
- 1991-12-05 RU SU915053092A patent/RU2066564C1/en active
-
1994
- 1994-11-04 US US08/335,980 patent/US5485965A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9210295A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6502773B1 (en) | 1997-06-23 | 2003-01-07 | Buhler Ag | Feed sensor system and method of operation |
JP2021514835A (en) * | 2018-05-25 | 2021-06-17 | ビューラー・アクチエンゲゼルシャフトBuehler AG | Roller mills with distributed metering and feeding equipment for roller mills, roller mills with such distributed weighing and feeding equipment, methods for crushing milled raw materials, and switchboard cabinets with cooling systems. |
Also Published As
Publication number | Publication date |
---|---|
JPH05504721A (en) | 1993-07-22 |
ATE114503T1 (en) | 1994-12-15 |
WO1992010295A1 (en) | 1992-06-25 |
RU2066564C1 (en) | 1996-09-20 |
US5361995A (en) | 1994-11-08 |
DE59103700D1 (en) | 1995-01-12 |
ES2067959T3 (en) | 1995-04-01 |
JPH0832309B2 (en) | 1996-03-29 |
EP0515596B1 (en) | 1994-11-30 |
US5485965A (en) | 1996-01-23 |
KR970001781B1 (en) | 1997-02-15 |
CH682809A5 (en) | 1993-11-30 |
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