EP0049225A1 - Dispositif interchangeable de commande pour le déplacement axial de la quenouille d'une poche de coulée - Google Patents

Dispositif interchangeable de commande pour le déplacement axial de la quenouille d'une poche de coulée Download PDF

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Publication number
EP0049225A1
EP0049225A1 EP81830166A EP81830166A EP0049225A1 EP 0049225 A1 EP0049225 A1 EP 0049225A1 EP 81830166 A EP81830166 A EP 81830166A EP 81830166 A EP81830166 A EP 81830166A EP 0049225 A1 EP0049225 A1 EP 0049225A1
Authority
EP
European Patent Office
Prior art keywords
stopper
ladle
actuator
regulating
commutable
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
EP81830166A
Other languages
German (de)
English (en)
Other versions
EP0049225B1 (fr
Inventor
Ferruccio Della Vedova
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.)
CEDA SpA
Original Assignee
CEDA SpA
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 CEDA SpA filed Critical CEDA SpA
Priority to AT81830166T priority Critical patent/ATE11383T1/de
Publication of EP0049225A1 publication Critical patent/EP0049225A1/fr
Application granted granted Critical
Publication of EP0049225B1 publication Critical patent/EP0049225B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/20—Stopper-rod operating equipment

Definitions

  • This invention concerns a commutable device for regul-. -ating the stopper of a ladle.
  • the invention concerns a device able to impart and regulate an axial motion in the stopper . .so as to govern the flow of the casting of molten metal through the outlet of a ladle.
  • the invention in question envisages the. embodiment of a device which can be commuted, depending on . the source of energy used, so as to employ electromechanical and/or only mechanical means belonging to said device.
  • this operation is generally carried out by. using a. stopper which is immersed in the molten metal in the ladle and positioned above the outlet.
  • Variation of the outgoing flow is brought about by moving said stopper axially. If the operation to fill the infot mould is to be carried out properly, it is important that, the displacement of the stopper should be very accurately controlled. This is necessary to prevent even small variations in the flow from leading to variations in the volume of molten metal in the ingot mould.
  • the invention in question, therefore, proposes to em*- body a device to regulate the temporary position of the ladle stopper in a very accurate manner, said device boing able to cooperate, by means of its mechanical part, with a rod or axial structure substantially parallel to the stopper so as to govern the movements of the stepper itself.
  • the device is extremely safe or indeed is free from risks and is affected to a negligible extent by creep due to changes in temperature. Moreover, the invention enables a fully automated regulating device to be obtained.
  • one or more signals can be derived from a suitable transducer device able to measure the level of the molten metal in the ingot mould, and said signals can be employed to govern the device in question for regulating the stopper.
  • the invention therefore, consists of a commutable device to regulate the stopper of a ladle, whereby the stopper immersed in the ladle is connected to a rod which moves axially in respect of the stopper itself and which comprises advantageously a tract cooperating with axial drive means, said device being characterized by including in mutual cooperation and coordination:
  • Fig. I show diagrammatically the connections between the regulating and actuating elements comprised in the device in question.
  • the signal IO indicating the level II is picked up by a transducer 12 of any desired type and is conformed and sent in the form of a signal 15 of a suitable nature to an absolute comparator 16.
  • Said comparator I6 controls the level II of the molten material in the ingot mould 17.
  • the comparator 16 is placed within the means 13 controlling and regulating the speed of the actuator 14, which in our example is of an electromechanical type.
  • the signal 10 is also sent to a summation means I8.
  • the absolute comparator 16 are preset, by means of suitable regulators I9 and 20, values of maximum and minimum threshold corresponding to the maximum and minimum values respectively of the level II in the ingot mould 17.
  • the signal I5 is added algebraically in the summation means 18 to a comparison signal 23 which is of the same physical nature as the signal 15 and which corresponds to the value of the optimal level II and is sent by a suitable adjustable 25 generator 24.
  • the error signal 26 obtained from the algebraic sum of the signals 15 and 23 is compared in a comparator 27.
  • the margin of the variations in level II is preset with a threshold of a positive value and a threshold of a negative value by means of two regulators 28 and 29.
  • Suitable signalling means 30, 31 and 32 indicate either the surpassing of the value of the one or the other of said thresholds by the error signal 26 or else a condition of optimal level II determined by the presence of said level II within the field of values enclosed between said thresholds.
  • the error signal 26 is also sent to a regulation system 33 which comprises two regulating groups 34 and 36 suitably controlled (38-39-40-41 and 42-43-44-45), a summation means 35, a position transducer 37 and a converter 48.
  • the error signal 26 is sent to a regulating group PID 34 having a proportional, integrating and derivative action.
  • Said signal of retroaction 49 of position of the stopper 47 is obtained by monitoring the movements of the rod 50 by means of the position transducer 37.
  • a converter 48 processes the signals coming from the position transducer 37 and emits the retroaction signal 49 conformed in such a way that it can be compared with the signal of position 46 of the stopper 47.
  • the summation means 35 sends a position error signal 51 to the regulating group PID 36, where the regulation parameters are controlled by means of the regulators 42, 43, 44 and 45.
  • the signal 52 emitted by the regulating group 36 is amplified by an amplifier 53 and is used thereafter to regulate the speed of the actuator 14 or the position of the stopper 47.
  • regulation of the speed of the actuator 14 can be done continuously or step-by-step or in a proportional manner.
  • a clutch 54 which can be operated by hand with means 55 that are rod means in our example, enables the shaft 56 of the actuator 14 to be connected to the drive means 57.
  • Said axial drive means which are conformed with a toothed sector 57 in our example, are meshed with a suitable equipped tract 58, which in the present example is conformed rack-vrise and is present on the shaft or axial structure 50 able to cooperate with the closure stopper 47 of the outlet hole 59 of the ladle 60.
  • the toothed sector 57 can also be operated by hand with a suitably placed rod 6I.
  • operation by hand is usually carried out after the toothed sector 57 has been disconnected from the shaft 56 of the actuator 14 by means of the clutch 54.
  • the clutch 54 acts also as a means to limit. torque for the actuator 14.
  • Said clutch allows its parts to be released from each other whenever, owing to accidental causes, the electro - mechanical actuator 14 forces the stopper 47 against an obstacle. In such a case it is possible to act by hand on the shaft 50 in an emergency so as to bring the stopper 47 back to its released position without disengaging the clutch 54 beforehand.
  • An "ON-OFF" transducer 62 monitors the condition of the clutch 54 and signals by means of an appropriate indicator (or signalling means) 63 the connection of the actuator 14 to the toothed sector 57.
  • the transducer 62 governs the disconnection of the activator 14 from the regulating group PID 36 and the restoring of electrical conditions of starting the regulation in both the regulating groups 34 - 36.
  • the regulating circuit 33 is employed advantageously with actuators which have a very quick response in time, and its performance is excessive if used with slow actuators.
  • the error signal 26 coming from the summation means 18 enters the group PD 64 employed to regulate the speed of the actuator I4 or the position of the stopper 47.
  • the factors or parameters of proportionality and derivation used in the regulation are preset and controlled by means of suitable regulators 65 and 66.
  • Fig. 3 gives an example of the application of the actuator system 67 to the ladle 60 stopper 47.
  • the actuator system 67 which is suitably anchored to a supporting structure 68, comprises the toothed sector 57; which in the examples of Figs. I, 2, 3, 4 and 5 is connected axially 56 to the actuator 14 and to the clutch 54 having a mechanical coupling and is connected radially to the hand- operated rod 61 by fork means 73.
  • the toothed sector 57 cooperates with the tract provided with a rack 58 on the shaft having an axial structure 50.
  • FIG. 3 does not show- the clutch 54, which is shown instead in Fig. 4 and 5.
  • the shaft 50 is anchored substantially parallel to the stopper 47 with a rigid arm 69 and is guided at its upper end by a bush 70 upheld by the plate 71 screwed to the ladle 60.
  • the stopper 47 is clamped to the rigid arm 69 inside a lateral regulation slot 72.
  • the fork 73 is connected to the toothed sector 57 with a bolt 74 and nut which permit a given sideways angulation of the rod 61 so as to facilitate the work of the machine operator.
  • the fork 73 is connected to the rod 61 with a locking- pin 75 so as to make replacement easy.
  • reaction block 76 which can be replaced and is employed to prevent bending of the shaft 50 and to maintain good mechanical connection between the rack 58 and toothed sector 57 so as to improve their manoeuvrability and working life.
  • the reaction block 76 includes an upper layer made of wear-resistant material; said material can be of a plastic type, for instance, of the type commercially known under the name of Rulon-LD.
  • the shaft 50 slides with its lower part in a movable sleeve 77, which is guided axially by a support 78 and guide 79 which are solidly fixed to the plate 71.
  • the movable sleeve 77 includes an elastic clamping half-ring 80, which makes it solidly fixed to the shaft 50; and a threaded tract 81 cooperating with a threaded ring 82 that can be revolved by means of the handwheel 83.
  • the threaded ring 82 By acting on the handwheel 83 circumferentially, the threaded ring 82 is caused to revolve and displaces axially the sleeve 77 and the shaft 50 solidly fixed thereto.
  • the rotation of the handwheel 83 leads to micrometric displacements of the shaft 50 and thereby to a fine adjustment of the course of the ladle 60 stopper 47.
  • the upper part of the shaft 50 is protected by means of bellows 84 and an insulated enclosing screen-85.
  • the shaft 50 By means of its weight the shaft 50 enables the whole mechanical structure of the actuator system 67 to be loaded or pre-loaded so as to eliminate mechanical play which could be created in said structure owing to the stresses which it undergoes during working.
  • the actuator system 67 shown in Figs. 4 and 5 can be readily put in a working position or withdrawn from said position; in the example shown it is equipped with pins 86 positioned above it and with two engagement devices 88.
  • the pins 86 are suitable for being lodged in two appropriate containing seatings 87 machined in the supporting structure 68 placed near the shaft 50, while the two en - gagement devices 88 can be inserted into the engagement seatings 89 so as to clamp the whole actuator system 67.
  • Fig. 5 shows the elements constituting the actuator 14, clutch 54 and toothed sector 57.
  • the actuator 14 comprises a motor 90 the rotation of which is transmitted to a toothed wheel 91 by known means.
  • the magnitude of the output of the actuator I4 is represented by the angular speed of the shaft 56 to which the toothed wheel 91 is keyed.
  • the motor 90 employed in the actuator 14 is fed with low tension so as to obviate the risks caused by the presence of high tensions.
  • the toothed sector 57 is solidly fixed with a coupling pin 93 to the outer housing 94 of the clutch 54.
  • the hub 95 of the clutch 54 is solidly fixed to the shaft 56.
  • a torsional pin 96 which is engaged with the means 55 by means of a clamping knob 97 is able to rotate a fork means 98 cooperating with a grooved ring (drum) 99.
  • Said grooved ring (drum) 99 is conformed outwardly in such a way as to be able to operate a suitably hinged 101 lever 100 between two extreme stable positions corresponding with the engagement or disengagement of the clutch 54 when said ring 99 is displaced by rotation of the fork means 98.
  • the lever 100 compresses the clutch plates Io2 - Io3 and clamps them together and thereby compresses the outer housing 94 against the hub 95,thereby connecting the motor 90 to the toothed sector 57.
  • Two frames 106 and I07 able to support and hold the actuator 14 and clutch 54 respectively are solidly fixed together with suitable connecting elements 108 which sur - mount the toothed sector 57 and remain separate therefrom.
  • the actuator I4 can be connected axially through the clutch 54 to a toothed wheel III.
  • Said toothed wheel III is positioned axially parellel to a toothed wheel II3 in such a way as to cooperate therewith II3.
  • the toothed wheel III can be positioned diversely and be inclined diversely in respect of the wheel 113 by using transmission means and supplementary toothed wheels.
  • the toothed wheel II3 is axially solidly fixed to a toothed wheel II4 so as to constitute axial drive means 112.
  • Said axial drive means II2 comprise axially a threaded cylindrical through hole 115 cooperating with a circumferentially threaded tract 58 of the shaft 50.
  • the shaft 50 can be engaged with some guide blocks II6 cooperating with lengthwise flat guide tracts II7 present in the upper and/or lower part of the shaft 50.
  • Said guide blocks 116 enable the shaft 50 to move vertically and prevent it from rotating.
  • the axial drive means II2 can be fixed and contained in a frame wherein the actuator I4, clutch 54 and toothed wheel II2 can also be lodged.
  • the regulation of the shaft 50 by hand is brought about by rotating with the rod 61 a toothed sector 57 cooperating at right angles with the toothed wheel II4 of the axial drive means 112.
  • toothed sector 57 and toothed wheel 114 coplanar. It is possible to make the toothed sector 57 and toothed wheel II3 coplanar by eliminating the toothed wheel II4.
  • a further regulation by hand can be carried out with suitable means 118 present in the lower part of the axial drive means 112.
  • a toothed wheel II9 can be envisaged as being solidly fixed to the toothed wheel III. Said toothed wheel II9 cooperates with a toothed wheel 120 positioned at right angles to itself 119.
  • the toothed wheel 120 can be operated by hand with crank means I2I able to adhere at least partially to the outer flat side 122 of the said wheel I20 during said operation.
  • crank means 121 comprise pins 123 able to be engaged in suitable seatings 124 machined in the outer flat side I23 of the toothed wheel 120 in such a way as to make the crank means 121 and toothed wheel I20 firmly fixed together during rotation by hand.
  • crank means 121 Disengagement of the crank means 121 from the toothed wheel 120 is ensured with elastic axial repelling means 125 cooperating with a catch 126.
  • the actuator 14 and clutch 54 - are positioned on the same axis as the shaft 50, an actuator 14 of a linear type being employed in this case.
  • the axial drive means II2 can be connected to the actuator 14 through the clutch 54 so as to be operated thereby 14.
  • Rotation by hand of the axial drive means 112 to cause vertical displacement of the shaft 50 can be brought about by acting on the toothed sector 57 meshed with the toothed wheel II3 belonging to said axial drive means 112.
  • Said rotation by hand can also take place by acting with the means connected to the rotor of the actuator 14 after the axial drive means II2 have been connecetd to the actuator 14 by the clutch 54.
  • Fig. 9 shows a variant of Fig. 8 wherein the crank activating means already shown in Fig. 7 are employed.
  • the action on the stopper can be continuous or can take place step-by-step or with self-controlled proportional operations, etc.
  • the action on the stopper can also be carried out axially; instead of the electromechanical or electrical actuator an electro-hydraulic actuator can be fitted;-where an electro-hydraulic actuator is employed, a safety valve or by-pass valve, for instance, can be fitted instead of the clutch 54, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Switches With Compound Operations (AREA)
  • Food-Manufacturing Devices (AREA)
  • Seal Device For Vehicle (AREA)
  • Push-Button Switches (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Continuous Casting (AREA)
  • Actuator (AREA)
EP81830166A 1980-09-25 1981-09-17 Dispositif interchangeable de commande pour le déplacement axial de la quenouille d'une poche de coulée Expired EP0049225B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81830166T ATE11383T1 (de) 1980-09-25 1981-09-17 Auswechselbare bedienungsvorrichtung zum axialen verschieben eines giesspfannenstopfens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8343980 1980-09-25
IT83439/80A IT1136500B (it) 1980-09-25 1980-09-25 Dispositivo commutabile per regolazione tampore paniera

Publications (2)

Publication Number Publication Date
EP0049225A1 true EP0049225A1 (fr) 1982-04-07
EP0049225B1 EP0049225B1 (fr) 1985-01-23

Family

ID=11321901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81830166A Expired EP0049225B1 (fr) 1980-09-25 1981-09-17 Dispositif interchangeable de commande pour le déplacement axial de la quenouille d'une poche de coulée

Country Status (8)

Country Link
EP (1) EP0049225B1 (fr)
JP (1) JPS5785669A (fr)
AT (1) ATE11383T1 (fr)
DE (1) DE3168506D1 (fr)
ES (1) ES505589A0 (fr)
IT (1) IT1136500B (fr)
SE (1) SE452123B (fr)
ZA (1) ZA816132B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695847A1 (fr) * 1992-09-24 1994-03-25 Leybold Ag Appareil pour ouvrir et fermer une ouverture de coulée.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102133633B (zh) * 2011-04-21 2013-08-07 马鞍山钢铁股份有限公司 一种连铸机中间罐塞棒开闭机构
CN106001531A (zh) * 2016-07-07 2016-10-12 麦格瑞科技（北京）有限公司 一种塞棒升降机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139241B (de) * 1960-08-23 1962-11-08 Juenkerather Maschbau Gmbh Betaetigungsvorrichtung fuer den Stopfen einer Giesspfanne
DE1232604B (de) * 1962-04-18 1967-01-19 Krupp Ag Huettenwerke Mechanische Stopfenfuehrung an einer Abstichpfanne zum Entgasen von Stahl, Gusseisen oder Metall
DE1935782A1 (de) * 1969-07-15 1971-01-28 Bbc Brown Boveri & Cie Stelleinrichtung fuer die Betaetigung des den Zufluss aus einem Verteilergefaess zu einer Durchlaufkokille,insbesondere einer Stranggusskokille steuernden Stopfens
DE2435485A1 (de) * 1974-07-24 1976-02-05 Schloemann Siemag Ag Giesspiegelregelung fuer stranggiessanlagen
EP0006433A1 (fr) * 1978-06-28 1980-01-09 SOCIETE DES ACIERS FINS DE L'EST Société Anonyme française Dispositif de réglage du débit d'un répartiteur dans une installation de coulée continue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139241B (de) * 1960-08-23 1962-11-08 Juenkerather Maschbau Gmbh Betaetigungsvorrichtung fuer den Stopfen einer Giesspfanne
DE1232604B (de) * 1962-04-18 1967-01-19 Krupp Ag Huettenwerke Mechanische Stopfenfuehrung an einer Abstichpfanne zum Entgasen von Stahl, Gusseisen oder Metall
DE1935782A1 (de) * 1969-07-15 1971-01-28 Bbc Brown Boveri & Cie Stelleinrichtung fuer die Betaetigung des den Zufluss aus einem Verteilergefaess zu einer Durchlaufkokille,insbesondere einer Stranggusskokille steuernden Stopfens
DE2435485A1 (de) * 1974-07-24 1976-02-05 Schloemann Siemag Ag Giesspiegelregelung fuer stranggiessanlagen
EP0006433A1 (fr) * 1978-06-28 1980-01-09 SOCIETE DES ACIERS FINS DE L'EST Société Anonyme française Dispositif de réglage du débit d'un répartiteur dans une installation de coulée continue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695847A1 (fr) * 1992-09-24 1994-03-25 Leybold Ag Appareil pour ouvrir et fermer une ouverture de coulée.

Also Published As

Publication number Publication date
EP0049225B1 (fr) 1985-01-23
ZA816132B (en) 1982-09-29
SE452123B (sv) 1987-11-16
DE3168506D1 (en) 1985-03-07
ES8205606A1 (es) 1982-06-16
IT8083439A0 (it) 1980-09-25
ES505589A0 (es) 1982-06-16
JPS5785669A (en) 1982-05-28
IT1136500B (it) 1986-08-27
SE8105226L (sv) 1982-03-26
ATE11383T1 (de) 1985-02-15

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