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WO2000058186A1 - Systeme non continu de nettoyage automatique d'aimants permanents ou d'electro-aimants - Google Patents

Systeme non continu de nettoyage automatique d'aimants permanents ou d'electro-aimants Download PDF

Info

Publication number
WO2000058186A1
WO2000058186A1 PCT/US1999/023383 US9923383W WO0058186A1 WO 2000058186 A1 WO2000058186 A1 WO 2000058186A1 US 9923383 W US9923383 W US 9923383W WO 0058186 A1 WO0058186 A1 WO 0058186A1
Authority
WO
WIPO (PCT)
Prior art keywords
sweeper
magnet
magnetic
cleaning
automatic cleaning
Prior art date
Application number
PCT/US1999/023383
Other languages
English (en)
Inventor
Bon Carlos Andres J. Stipicic
Original Assignee
Eriez Manufacturing Co.
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 Eriez Manufacturing Co. filed Critical Eriez Manufacturing Co.
Priority to AU65106/99A priority Critical patent/AU771654B2/en
Publication of WO2000058186A1 publication Critical patent/WO2000058186A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/284—Magnetic plugs and dipsticks with associated cleaning means, e.g. retractable non-magnetic sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts

Definitions

  • the field for this invention includes any type of industry which needs to transfer or transport bulk materials by means of conveyor belts or through chutes, on tables, inclined planes, vibratory transporters or any other form, such as the mining, metallurgical, agricultural, forestry, plastics, chemical, cellulose and paper industries among others.
  • This non-continuous self cleaning system acts as a scraping device and cleaner of metals trapped by permanent magnets or electromagnets.
  • the non-continuous, self cleaning system of magnets and electromagnets will displace and clean off the ferrous metals, avoiding their accumulation on the magnetic faces which would reduce their efficiency as separators, and will also avoid the trapped particles from falling or being brushed off again into the flow of materials due to the overload of particles on the magnetic separators.
  • a manually operated sliding plate is used.
  • the plate is made from a non-magnetic material, generally series 300 stainless steel, containing one or more metallic sections which move the trapped iron particles away from the coverage of the magnetic field. Some manufacturers call this mechanism a "stripper pan" .
  • arm stripper which consists of a non-magnetic arm which is moved manually on a pivot from one corner of the magnetic face of the magnet, covering the whole surface.
  • a self cleaning system consisting of an endless rubber band or belt which revolves round the magnet, driven by a four or two pulley mechanism with shafts and bearings, one of which is powered by a motor and reduction gear drive system.
  • the belt is equipped with metal or rubber sweeper strips, which slide the trapped iron particles away from the area covered by the magnetic field until they fall or are displaced to one side or in line, depending on the position of the magnet in relation to the flow of material and depending on the direction of travel of the belt.
  • the trapped iron particles can also be removed manually from the face of the separator. Generally, however, the electromagnet is switched off so that the iron particles fall by gravity or are easier to remove manually.
  • the iron particles either fall directly onto the transporter over which the magnet is suspended and are then removed manually, or it becomes necessary to move the equipment from its working position to avoid the iron particles falling into the material or into undesirable places, and once the magnet is clean, the equipment is returned to its original position.
  • Automatic cleaning A self cleaning system identical to the one described for permanent magnets and for which it is not necessary to switch off the electromagnet.
  • the disadvantages of the foregoing methods, mechanisms and systems for cleaning are basically those of inefficiency and danger for the operator, especially in the case of manual methods, with or without mechanical assistance, as they depend entirely on the skill of the person in charge of cleaning the surface of the magnet .
  • This person runs the risk of injury through being trapped by the magnetic field or by sudden release of the iron particles, which can also fall back into the material flow from which they should be separated.
  • these manual methods, with or without mechanical assistance are slow, and therefore, relatively unproductive. Their speed will depend on the skill acquired by the operator to meticulously carry out the cleaning process in the minimum time.
  • the systems of automatic cleaning using a cleaning belt have the disadvantage of taking up too much space, especially in the case of those with two pulleys whose diameters must be greater than the height of the magnet .
  • the belts lose their alignment, especially when working on an inclined plane, and they stretch with use. This requires continual adjustment to regulate belt tension and subjects the shafts and bearings of the drive and driven pulleys to mechanical stress.
  • the belts and their sweeper strips are subject to continuous wear and the drive system must function without stoppages. These are high cost mechanisms due to the number of moving parts involved in the consequent wear and maintenance and lubrication requirements, etc. Their direction of expulsion of the trapped metal particles and direction of rotation are closely linked to the design of the magnets, and once they have left the factory, these are difficult to change or modify.
  • the obvious solution to the above problem is to have a cleaning mechanism which is not subject to the skill of the operator, which makes the best use of available space and which allows for the sweeping off, extraction and elimination of iron particles from permanent magnets or electromagnets once these particles have been attracted and trapped on their magnetic surfaces, using fewer components subject to wear and requiring maintenance.
  • the mechanism should also be suitable for equipment suspended above conveyor belts or their head pulleys, over chutes or as the base of these, over tables, inclined planes, conveyors and vibratory feeders of any type.
  • the non-continuous, self cleaning system for permanent magnets and electromagnets proposed by this invention is in itself a clear breakthrough in the field as it includes the attachment of a grooved sheet or plate of non-magnetic material to the magnetic or active surface of the magnet over which a non-magnetic toothed sweeper operates.
  • the function of both these elements is to prove a meticulous cleaning of the magnetic surface as the sweeper's teeth fit perfectly into the grooves of the sheet .
  • the sweeper slides across on guides located on each side of the grooved sheet and these guides ensure that the sweeper and the sheet are kept in close contact.
  • the sweeper is connected at each end to a spring and these springs are stretched when the sweeper is moved to its trigger point by the driven nuts on each side.
  • the nuts are driven by the threaded rods on screws which revolve by means of an electric motor connected to each of them. These screws are housed in two tubes which protect them and which guide the moveable nuts.
  • the sweeper Once the sweeper is in place, it is held by a latch device which protrudes through the sheet or plate on one side of the mechanism. The moveable nuts are then returned to the opposite side by a counter clockwise rotation of the screws. On reaching the end of its travel, one of the nuts lifts a bar attached to the latch thus freeing the sweeper, which then sweeps across the face of the magnet being pulled by the force of the stretched springs in the same way as a stone is shot from a catapult.
  • the sweeper slides between the sheet attached to the face of the magnet and the iron particles, which tend to stay in the same place and are then in position to be swept off when the sweeper is again triggered.
  • the sweeper is stopped at the end of its run by means of shock absorbing springs placed on each side and is then ready to start a new cleaning cycle.
  • the positioning of the moveable nuts which push the sweeper back to its trigger point and the subsequent activation of the latch are controlled by limit switches which make contact with them and which, together with an electric control panel, allow the non-continuous self cleaning system to be operated, either manually or automatically, by remote control or from a distance, by means of a sensor of the iron particles trapped by the magnet, with timers, computerized means or by an operator.
  • a warning may be given of the start of the cleaning cycle or release of the wiper by a sound or visual alarm or both.
  • the cleaning cycles may be recorded for operational control, maintenance or statistics.
  • the parts that are subject to wear and tear are easier to change and cost less than the belts of the traditional systems .
  • Sound or visual alarms can be inclined to warn of the cleaning operation and discharge of iron particles.
  • FIGURE 1 is an overhead view of the non-continuous, self cleaning mechanism for magnets.
  • FIGURE 2 is a front elevation of the non-continuous, self cleaning mechanism for magnets shown in Figure 1.
  • FIGURE 3 is a front view of the non-continuous, self cleaning mechanism for magnets taken along line 3-3 of Figure 1.
  • FIGURE 4 is a side view of the non-continuous, self cleaning mechanism for magnets shown in Figure 1.
  • FIGURE 5 is a side view of the non-continuous, self cleaning mechanism for magnets taken along line 5-5 in Figure 1.
  • FIGURE 6 is an under view of the left side of the non- continuous, self cleaning mechanism for magnets.
  • FIGURE 7 is a left side overhead view of the non- continuous, self cleaning mechanism for magnets.
  • the non-continuous, self cleaning system or automatic cleaning system of permanent magnets or electromagnets is formed by a non-magnetic, moveable, toothed sweeper arm 1 which slides across a non-magnetic grooved plate or sheet 2 which is attached to the face of the magnet 3.
  • the sweeper arm 1 has at its ends perforated components 4 to which are connected one of the ends of the catapult springs 5 whose other ends are inserted in a perforation of the projecting plates 6, bolted to the forward edge of the non-magnetic grooved plate 2.
  • Each of the springs 5 is located below the sides of the magnet 3 and above the grooved plate 2 , making a longitudinal movement from the front to the back of the mechanism and vice versa.
  • the endless screws 8 return the moveable nuts 14 to the front of the mechanism by reverse rotation of the motors 9.
  • the tubes 7 and the springs 5 are shielded by a protective covering 13.

Landscapes

  • Non-Mechanical Conveyors (AREA)

Abstract

L'invention concerne un système non continu de nettoyage automatique d'aimants équipé d'un balai mécanique (1) maintenu en place et libre de mouvement grâce à des coussinets de guidage reposant sur les côtés correspondants d'un plateau (2). Le mouvement du balai mécanique peut être accompli par des systèmes mécaniques ou à impact, pneumatiques ou hydrauliques et non seulement par des moteurs électriques (9). Le mouvement d'avance rapide d'une face plane du balai mécanique (1) frappe les particules de fer collées à la surface magnétique et les éjecte dans la même direction effectuant ainsi le nettoyage des particules de fer piégées. Le système est commandé par des interrupteurs de fin de cours manuels ou automatiques. Des alarmes sonores et visuelles peuvent être connectées afin de signaler le début du cycle de nettoyage et déclencher le balai mécanique.
PCT/US1999/023383 1999-03-26 1999-10-07 Systeme non continu de nettoyage automatique d'aimants permanents ou d'electro-aimants WO2000058186A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU65106/99A AU771654B2 (en) 1999-03-26 1999-10-07 Non-continuous system for automatic self cleaning of permanent magnets or electromagnets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL1999000577 1999-03-26
CL577-99 1999-03-26

Publications (1)

Publication Number Publication Date
WO2000058186A1 true WO2000058186A1 (fr) 2000-10-05

Family

ID=4574510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/023383 WO2000058186A1 (fr) 1999-03-26 1999-10-07 Systeme non continu de nettoyage automatique d'aimants permanents ou d'electro-aimants

Country Status (2)

Country Link
AU (1) AU771654B2 (fr)
WO (1) WO2000058186A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011092629A3 (fr) * 2010-01-29 2011-11-17 Ecolab Usa Inc. Système de détection de transporteur propre
US9336936B1 (en) 2015-07-13 2016-05-10 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic pathway cleaning assemblies and vehicles incorporating the same
US10758918B2 (en) 2016-04-26 2020-09-01 DRP Ventures Inc. Method and apparatus for cleaning a machine employing permanent magnets to remove ferrous metals from a flow of material
CN111957432A (zh) * 2020-08-20 2020-11-20 李云明 一种造纸分料装置
CN118373154A (zh) * 2024-06-25 2024-07-23 新乡市达升机械制造有限公司 一种矿山石料安全自动输送装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161666A (en) * 1991-08-26 1992-11-10 Hugh D. Eller Conveyor belt cleaner
US5400897A (en) * 1994-03-16 1995-03-28 Doyle Equipment Manufacturing Company Fertilizer conveyor
US5746302A (en) * 1996-04-02 1998-05-05 Bowman; John H. Apparatus for cleaning conveyors
US5893450A (en) * 1997-09-04 1999-04-13 Micron Electronics, Inc. Roller conveyor cleaning apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161666A (en) * 1991-08-26 1992-11-10 Hugh D. Eller Conveyor belt cleaner
US5400897A (en) * 1994-03-16 1995-03-28 Doyle Equipment Manufacturing Company Fertilizer conveyor
US5746302A (en) * 1996-04-02 1998-05-05 Bowman; John H. Apparatus for cleaning conveyors
US5893450A (en) * 1997-09-04 1999-04-13 Micron Electronics, Inc. Roller conveyor cleaning apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011092629A3 (fr) * 2010-01-29 2011-11-17 Ecolab Usa Inc. Système de détection de transporteur propre
US8141695B2 (en) 2010-01-29 2012-03-27 Ecolab Usa Inc. Clean conveyor sensing system
US9336936B1 (en) 2015-07-13 2016-05-10 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic pathway cleaning assemblies and vehicles incorporating the same
US10758918B2 (en) 2016-04-26 2020-09-01 DRP Ventures Inc. Method and apparatus for cleaning a machine employing permanent magnets to remove ferrous metals from a flow of material
CN111957432A (zh) * 2020-08-20 2020-11-20 李云明 一种造纸分料装置
CN111957432B (zh) * 2020-08-20 2023-03-28 李云明 一种造纸分料装置
CN118373154A (zh) * 2024-06-25 2024-07-23 新乡市达升机械制造有限公司 一种矿山石料安全自动输送装置

Also Published As

Publication number Publication date
AU6510699A (en) 2000-10-16
AU771654B2 (en) 2004-04-01

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