EP0183613A1 - Induktionsofen mit vertikalen Kanälen - Google Patents

Induktionsofen mit vertikalen Kanälen Download PDF

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Publication number
EP0183613A1
EP0183613A1 EP85402265A EP85402265A EP0183613A1 EP 0183613 A1 EP0183613 A1 EP 0183613A1 EP 85402265 A EP85402265 A EP 85402265A EP 85402265 A EP85402265 A EP 85402265A EP 0183613 A1 EP0183613 A1 EP 0183613A1
Authority
EP
European Patent Office
Prior art keywords
pins
motor
oven
oven according
controlling
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
Application number
EP85402265A
Other languages
English (en)
French (fr)
Other versions
EP0183613B1 (de
Inventor
André Berson
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0183613A1 publication Critical patent/EP0183613A1/de
Application granted granted Critical
Publication of EP0183613B1 publication Critical patent/EP0183613B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • F27D25/001—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag comprising breaking tools, e.g. hammers, drills, scrapers
    • F27D25/005—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag comprising breaking tools, e.g. hammers, drills, scrapers used for cleaning the channels of induction furnaces
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/16—Furnaces having endless cores
    • H05B6/20—Furnaces having endless cores having melting channel only

Definitions

  • the present invention relates to electric induction ovens, with vertical channels, used for melting and keeping an alloy, for example an aluminum alloy, at temperature.
  • the metal or alloy melts inside the vertical channels, which causes rapid fouling of the latter and forces them to be regularly cleaned.
  • the vertical channel cleaning is carried out using cleaning brushes which have hitherto been operated by hand.
  • the operator communicates to the spindle a vertical reciprocating rectilinear movement by striking with a mass on the spindle rod if the force required by the descent is too great.
  • To reassemble the spindle the operator strikes using the ground under the handle of the spindle or uses a hoist and a sling. This work is all the more painful as it is performed above the bath of molten metal.
  • the present invention relates to an induction furnace with vertical channels which is improved so as to remedy this drawback.
  • the oven according to the invention is characterized in that it comprises a series of scouring pins which are each arranged in the axis of a channel and which are mounted vertically movable relative to the oven so that they can be moved in the channels or extracted therefrom, a motor for moving all of the spindles, and automatic timed means for controlling the motor so as to impart vertical reciprocating motion to the spindles at given time intervals.
  • the automatic timed motor control means may include a timed control clock transmitting a periodic signal capable of controlling the motor in the direction corresponding to the lowering of the spindles, a contactor detecting the low position of the spindles, and a timer sensitive to the signal of the contactor and suitable for controlling the motor in the direction corresponding to the ascent of the pins.
  • the oven advantageously comprises means for allowing heating only when the pins are in the high position. The heating is thus stopped during the descaling maneuver, which prevents the mixing of the metal which would cause erosion of the pins.
  • the motor can be constituted by a double-acting cylinder, preferably pneumatic, the rod of which is integral with all of the pins. It can also be constituted by an electric motor, the output shaft of which is connected via a torque limiter to a pinion engaged with a rack fixed to the set of pins.
  • the pins can be mounted on a cross member which is integral with the rod of the jack or the rack and which is movable relative to a gantry supporting the motor and disposed above the oven.
  • each channel 2 In the axis of each channel 2 is a scouring spindle 6, all of the spindles being fixed to a cross-member 7. This is integral with the piston rod 8 of a pneumatic cylinder 9, with double effect, which is arranged vertically and carried by a gantry 10 resting on the furnace 1. This gantry carries at its lower part a guide 11 for the scouring pins 6.
  • the jack 9 is supplied with compressed air by a distributor 12.
  • This distributor is controlled in the direction of lowering of the spindles by a timed control clock 13 and, in the opposite direction, by a timed control device 14 which is dependent a contactor 15. The latter is actuated by the cross member 7 in the low position.
  • An alarm 16 is connected by a timer 17 to the devices 13 and 14 so as to enter into action a given time after an order has been given to these devices, if these have not worked.
  • the timed clock 13 sends a signal which ensures the displacement of the distributor valve 12 and brings it into its position corresponding to the lowering of the pins.
  • the contactor 18 opens, which cuts the power to the coils 3 and ensures the heating stops.
  • the pins 6 descend, enter the molten metal bath, then into the channels 2 which they clean up.
  • the cross member 7 actuates the contactor 15.
  • the timer 14 ensures the return of the distributor valve 12 to its initial position so that the pins go up.
  • the cross member 7 actuates the contactor 18 so that the coils 3 are supplied and the heating resumes.
  • the lifter 7 is integral with a vertical rack 19 engaged with a pinion 20 which is fixed on a shaft 21.
  • the latter is connected by a torque limiter 22 to the shaft of an electric motor 23 with two directions of rotation.
  • the power supply to the motor 23 is connected to the network 24 by an inverter switch 25 which is controlled by the timed devices 13 and 14 and by a microswitch 26 itself controlled by the torque limiter 22.
  • This embodiment operates like that of FIG. 1.
  • the clock 13 rotates the motor 23 in the direction corresponding to the descent of the pins 6.
  • the microswitch 26 stops the engine 23.
  • the timer 14 turns the engine in the opposite direction; the pins go up.
  • the motor 23 is again stopped by the microswitch 26 and the contactor 18 actuated by the cross-member 7 returns the heating to service.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP19850402265 1984-11-23 1985-11-21 Induktionsofen mit vertikalen Kanälen Expired EP0183613B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8418138 1984-11-23
FR8418138A FR2573856B1 (fr) 1984-11-23 1984-11-23 Four a induction a canaux verticaux

Publications (2)

Publication Number Publication Date
EP0183613A1 true EP0183613A1 (de) 1986-06-04
EP0183613B1 EP0183613B1 (de) 1988-03-30

Family

ID=9310026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850402265 Expired EP0183613B1 (de) 1984-11-23 1985-11-21 Induktionsofen mit vertikalen Kanälen

Country Status (3)

Country Link
EP (1) EP0183613B1 (de)
DE (1) DE3562049D1 (de)
FR (1) FR2573856B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210030546A (ko) * 2019-09-09 2021-03-18 코닝 인코포레이티드 토크 리미터를 구비한 용융 퍼니스 전극 푸시 어셈블리

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519344C (de) * 1929-03-13 1931-05-05 Emil Friedrich Russ Elektrischer Ofen zum Schmelzen von Metallen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519344C (de) * 1929-03-13 1931-05-05 Emil Friedrich Russ Elektrischer Ofen zum Schmelzen von Metallen

Also Published As

Publication number Publication date
FR2573856A1 (fr) 1986-05-30
FR2573856B1 (fr) 1987-01-23
DE3562049D1 (en) 1988-05-05
EP0183613B1 (de) 1988-03-30

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