EP0125117A2 - Kontrolleinrichtung für Kugelmühle - Google Patents

Kontrolleinrichtung für Kugelmühle Download PDF

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Publication number
EP0125117A2
EP0125117A2 EP84303017A EP84303017A EP0125117A2 EP 0125117 A2 EP0125117 A2 EP 0125117A2 EP 84303017 A EP84303017 A EP 84303017A EP 84303017 A EP84303017 A EP 84303017A EP 0125117 A2 EP0125117 A2 EP 0125117A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
revolutions
control device
brake
sensing means
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.)
Withdrawn
Application number
EP84303017A
Other languages
English (en)
French (fr)
Other versions
EP0125117A3 (de
Inventor
Eric F/O William Boulton Limited Birks
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
William Boulton Ltd
Original Assignee
William Boulton Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by William Boulton Ltd filed Critical William Boulton Ltd
Publication of EP0125117A2 publication Critical patent/EP0125117A2/de
Publication of EP0125117A3 publication Critical patent/EP0125117A3/de
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the present invention concerns improvements in or relating to control devices for ball mills or similar apparatus, that is apparatus including a rotatable cylinder containing product to be processed by a tumbling action.
  • apparatus including a rotatable cylinder containing product to be processed by a tumbling action.
  • ball mills such apparatus will be referred to as ball mills.
  • an entry port is provided in the drum side and the mill is intended to be loaded ard unloaded when the port occupies a particular position, for example, at top dead centre.
  • an operator switches off the motor driving the cylinder of the mill when a predetermined time has elapsed or a predetermined number of rotations has been achieved.
  • the cylinder then freewheels to rest and there is no guarantee that the port occupies the desired unloading position.
  • the operator must then operate the start control for the motor in an attempt to bring the port to top dead centre. This is difficult and damaging to the motor and its control gear.
  • a further disadvantage with the existing arrangement is that the drum, during loading and unloading may free-wheel and as a result may move away from the top deal centre position. This could be dangerous and is certainly inconvenient.
  • a ball mill control device comprising brake means for arresting rotation of the cylinder of the mill, sensing means arranged alongside said cylinder, means on the cylinder to actuate said sensing means and counting means actuable by said sensing means, said counting means being adapted to deactuate drive means for said cylinder and apply said brake at a predetermined time.
  • said sensing means is magnetic, alternatively it may be light sensitive.
  • said counting means counts the number of revolutions of the cylinder. It may have two counters, one to count the number of revolutions of the cylinder when it is driven, one to count free-wheeling revolutions.
  • the means on the cylinder for actuating the sensing means are adjustable relative to the cylinder whereby the position of a port in the cylinder may occupy a predetermined position when the brake is applied.
  • the counting means is adjustable whereby varying driven and free-wheeling revolutions can be pre-set therein.
  • the brake is a friction disc brake.
  • it may be a drum brake, or a positive mechanical locking means, for example a latch.
  • a method of controlling a ball mill whereby after operation the cylinder of the mill comes to rest in a predetermined position including counting the number of revolutions of the cylinder, de-actuating the drive to the cylinder when a predetermined number of revolutions has been counted, counting a further predetermined number of revolutions of the cylinder as it decelerates, and applying a brake to stop the cylinder in said predetermined position.
  • a ball mill comprises a cylinder 10 for product to be treated rotatably mounted at each end on trunnions 12.
  • a loading and unloading port is provided in the cylinder wall and the mill is designed for loading and unloading operations with the port at the top dead centre position.
  • a sensing device 14 is adjustably mounted on framework (not shown) supportingthe cylinder 10 and detects a sensor actuator, in the form of a ferrous block 16, mounted on a flanged end of the cylinder.
  • the mounting means for the block 16 are so designed that the block may be mounted at a desired angular position on the flange.
  • a signal is generated by the means 14 and transmitted to a counting means 18 which incorporates controls for the electric motor 20 which drives the cylinder by way of a suitable transmission (not shown) and for a brake assembly 22 actuable on the cylinder or the transmission.
  • the counting means is provided with two presetting arrangements, a first 24 on which a predetermined number of revolutions of the cylinder when it is being driven by the motor can be set, and a second 26 on which a predetermined number of revolutions of the cylinder when it is decelerating to rest can be set.
  • the first number of revolutions is determined by the product to be treated in the cylinder and the degree of treatment to which it is to be subjected and the second is determined on setting up and commissioning the mill.
  • a predetermined number of revolutions is set on the first preset arrangement 24. This number is the total number of revolutions required for complete processing of the product less the number of revolutions which has been predetermined by experimentation which are required for the cylinder to decelerate almost to a stop when drive to the cylinder is discontinued. This second number is preset on the second means 26.
  • the motor.20 is then started and each revolution of the cylinder is detected by the sensing means 14 and signalled to the counting means 18 whereby the revolutions are counted off the first preset means 24.
  • the cylinder begins to free-wheel to rest and the second preset means are subjected to the signal from the sensing means and commence to count down.
  • the second means cause the brake to be actuated to stop the cylinder and by preadjustment of the block 16 and/or the sensing means 14 the cylinder stops and is held with the port in the correct top dead centre position. The brake is only released just prior to the start of the next operating cycle of the mill.
  • the revolution sensing means need not be magnetic but could be mechanical or light sensitive.
  • the brake 22 may be a drum or disc brake actuable on the cylinder or the motor or the transmission therebetween or may be a positive mechanical locking device such as a latch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP84303017A 1983-05-04 1984-05-04 Kontrolleinrichtung für Kugelmühle Withdrawn EP0125117A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08312129A GB2140171A (en) 1983-05-04 1983-05-04 Ball mill control device
GB8312129 1983-05-04

Publications (2)

Publication Number Publication Date
EP0125117A2 true EP0125117A2 (de) 1984-11-14
EP0125117A3 EP0125117A3 (de) 1985-08-21

Family

ID=10542101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84303017A Withdrawn EP0125117A3 (de) 1983-05-04 1984-05-04 Kontrolleinrichtung für Kugelmühle

Country Status (2)

Country Link
EP (1) EP0125117A3 (de)
GB (1) GB2140171A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2075072A1 (de) * 2007-12-27 2009-07-01 Claudius Peters Technologies GmbH Vorrichtung und Verfahren zur Überwachung der Mahlkugelbewegung in einer Kugelringmühle
CN105498912A (zh) * 2015-12-24 2016-04-20 山东理工大学 曲柄滑块式多仓管磨机胀肚检测装置及预胀肚调控方法
CN105583038A (zh) * 2015-12-24 2016-05-18 山东理工大学 一种电涡流式多仓管磨机胀肚检测装置及预胀肚调控方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19637275A1 (de) * 1996-09-13 1998-03-19 Deutz Ag Zweiwalzenmaschine, insbesondere Walzenpresse zur Druckbehandlung körnigen Gutes
DE19747628A1 (de) * 1997-10-29 1999-05-06 Bayer Ag Verfahren zur Füllstandsüberwachung bei Strahlmühlen und Prallmühlen
CN104907141B (zh) * 2015-05-25 2018-04-27 湖北富升智能装备股份有限公司 一种弧形及盘形直线电机直驱的数控球磨机
CN111330698A (zh) * 2020-03-26 2020-06-26 厦门理工学院 一种连续式球磨机和控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB860644A (en) * 1957-08-12 1961-02-08 Smidth & Co As F L Mechanism for stopping a rotating power-driven drum
DE2823140A1 (de) * 1978-05-26 1979-11-29 Kloeckner Humboldt Deutz Ag Verfahren und vorrichtung zur einstellung einer definierten ruheposition eines drehrohres
GB2040075A (en) * 1978-12-30 1980-08-20 Toyoda Automatic Loom Works Control of operation of loom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1439665A (en) * 1972-09-26 1976-06-16 Renault Methods of and devices for braking and indexing the spindle of a machine tool rotating at high speed
JPS5854886A (ja) * 1981-09-25 1983-03-31 Sony Corp 映像信号再生装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB860644A (en) * 1957-08-12 1961-02-08 Smidth & Co As F L Mechanism for stopping a rotating power-driven drum
DE2823140A1 (de) * 1978-05-26 1979-11-29 Kloeckner Humboldt Deutz Ag Verfahren und vorrichtung zur einstellung einer definierten ruheposition eines drehrohres
GB2040075A (en) * 1978-12-30 1980-08-20 Toyoda Automatic Loom Works Control of operation of loom

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2075072A1 (de) * 2007-12-27 2009-07-01 Claudius Peters Technologies GmbH Vorrichtung und Verfahren zur Überwachung der Mahlkugelbewegung in einer Kugelringmühle
CN105498912A (zh) * 2015-12-24 2016-04-20 山东理工大学 曲柄滑块式多仓管磨机胀肚检测装置及预胀肚调控方法
CN105583038A (zh) * 2015-12-24 2016-05-18 山东理工大学 一种电涡流式多仓管磨机胀肚检测装置及预胀肚调控方法
CN105498912B (zh) * 2015-12-24 2018-01-19 山东理工大学 曲柄滑块式多仓管磨机胀肚检测装置及预胀肚调控方法

Also Published As

Publication number Publication date
GB8312129D0 (en) 1983-06-08
EP0125117A3 (de) 1985-08-21
GB2140171A (en) 1984-11-21

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Inventor name: BIRKS, ERICF/O WILLIAM BOULTON LIMITED