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EP2574414A1 - Entraînement de bouchon électromagnétique - Google Patents

Entraînement de bouchon électromagnétique Download PDF

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Publication number
EP2574414A1
EP2574414A1 EP11183395A EP11183395A EP2574414A1 EP 2574414 A1 EP2574414 A1 EP 2574414A1 EP 11183395 A EP11183395 A EP 11183395A EP 11183395 A EP11183395 A EP 11183395A EP 2574414 A1 EP2574414 A1 EP 2574414A1
Authority
EP
European Patent Office
Prior art keywords
linear drive
lifting rod
drive
plug
stopper
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Withdrawn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
EP11183395A
Other languages
German (de)
English (en)
Inventor
Markus Mairhofer
Christian Froehlich
Johannes Kehrer
Karl Geiselhofer
Alfred Kontriner
Friedrich Derflinger
Josef Guttenbrunner
Johann Penn
Helmut Sulzner
Alfred Trauner
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.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to EP11183395A priority Critical patent/EP2574414A1/fr
Priority to PCT/EP2012/069015 priority patent/WO2013045520A1/fr
Publication of EP2574414A1 publication Critical patent/EP2574414A1/fr
Withdrawn legal-status Critical Current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
    • 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

  • the present invention relates to an electromechanical plug drive, a method for balancing elasticities and mechanical play in the automated control of the plug drive and the use of the plug drive.
  • Plug drives for raising and lowering a typically elongate closure member, the so-called plug, whereby the effluent from a melt vessel can be changed are known to those skilled in different fields of secondary metallurgy and foundry technology, in particular continuous casting and two-roll casting.
  • the invention relates to a method for compensating elasticities and mechanical games in the automated control of a plug drive.
  • the invention relates to the use of the plug drive according to the invention for carrying out the method according to the invention.
  • the SERT is a plug drive with a lifting rod, a stationary housing and an electromechanical linear drive for raising and lowering the lifting rod known, the linear drive of an electric motor and a transmission for implementing the rotational movement of the electric motor is formed into a translational movement. Due to the so-called "in-line" arrangement of the electric motor and the lifting rod, the lifting force of the linear drive is optimized introduced into the lifting rod. In order to keep the investment costs per distribution truck low, it is possible to decouple the electric motor from the transmission and the lifting rod by means of a coupling which is designed as a bayonet lock before a distributor change.
  • the electric motor including the control electrics can remain on the distributor car so that the electric motor can be reconnected to a gearbox of a plug drive associated with the new distributor.
  • Due to the structural separation of the engine and transmission the manufacturing costs and the length of the linear drive are increased, so that this solution can often not be used in continuous casting for long products due to the length.
  • the mass moment of inertia is increased by the physical separation and the mandatory coupling between the electric motor and the transmission.
  • the drive torque and therefore the size of the motor must be increased, which in turn, however, has a negative effect on the compactness of the plug drive.
  • the Danieli is also a plug drive with a lifting rod, a stationary housing and an electromechanical linear drive known, wherein the linear drive is formed of an electric motor and a transmission for implementing the rotational movement of the electric motor in a translational movement.
  • the linear actuator can not be removed from the lifting rod, so that each distributor must be carried out with a complete plug drive including electric motor, whereby the acquisition cost is significantly increased.
  • the object of the invention is to overcome the disadvantages of the prior art and to present a low-cost, compact, highly dynamic plug drive with good controllability as well as a method for controlling the plug drive with which any existing elasticities or bearing play in the plug drive can be compensated.
  • the compactness should make it possible to use the plug drive both for continuous casters for long (e.g., billet, pre-profile or bloom) and flat products (e.g., slab plants). Due to the high dynamics, a good controllability of the plug drive is to be achieved so that the plug drive can quickly approach a desired position or set a desired flow from the metallurgical vessel. Finally, the plug drive should be inexpensive to display.
  • the displacement measuring device is designed as a rotary encoder, wherein the rotary encoder is technically connected to a rotor of the electric motor and the rotary encoder can output two phase-shifted output signals for determining the rotational speed and the direction of rotation of the rotor.
  • rotary encoders are known to the person skilled in the art under the term "resolver”.
  • the resolver can be fully integrated into the structural unit of the liner drive in a compact manner without increasing its overall length.
  • the thrust spindle, the lifting rod, the boom or even form the plug itself with a path measuring device for determining the stroke can be fully integrated into the structural unit of the liner drive in a compact manner without increasing its overall length.
  • the thrust spindle, the lifting rod, the boom or even form the plug itself with a path measuring device for determining the stroke for example, the thrust spindle, the lifting rod, the boom or even form the plug itself with a path measuring device for determining the stroke.
  • the force measuring device is designed as a current measuring device.
  • the current measuring device measures either at least one motor current in the electric motor itself or preferably in power electronics that is assigned to the electric motor. From the motor current can be deduced on the torque of the motor, wherein the torque via the transmission defines the lifting force of the linear drive. Also in this embodiment, the force measuring device can be completely integrated into the electric motor or its power electronics, without the length of the linear drive is increased. As an alternative, e.g. the lifting rod having a force measuring device for determining the lifting force.
  • the assembly and disassembly of the linear drive is easily possible, it is advantageous if either the housing of the linear drive or an electrical connector that can connect power electronics with the linear drive, at least two switches (eg push button) for extending and retracting the thrust spindle exhibit.
  • the stroke of the linear drive can be quickly adapted to different positions of the lifting rod.
  • the plug is releasably attached to one end of the boom.
  • Suitable guide elements are, for example, linear ball bearings, guide rings, plain bearings, spring-loaded or prestressed guide rollers or balls in question.
  • a hand lever engages via a lever tab which is pivotally supported on the housing in the lifting rod, so that the lifting rod can be moved manually by means of the hand lever.
  • this mechanism has a force transmission i of 3 ⁇ i ⁇ 10, preferably 5 ⁇ i ⁇ 8, so that the operator can move the plug with little effort.
  • the hand lever is removable, and preferably by at least 180 ° pivotally formed. This allows the operator to take different positions to the metallurgical vessel during manual operation.
  • the housing has a visual height indication, e.g. in the form of a ruler, for the position of the lifting rod.
  • the plug drive has a friction-locked and / or a form-fitting torque support.
  • the positive torque support takes place via a parallel to the longitudinal axis of the lifting rod aligned Guide pin, which is connected to the housing, and a guide portion (eg a guide groove or a guide bore) in the boom for guiding the guide pin.
  • a guide portion eg a guide groove or a guide bore
  • the frictional torque support via a parallel to the longitudinal axis of the lifting rod aligned support pin, which supports the boom relative to the housing.
  • the support pin preferably pressed by a compression spring, against the boom, so defined by the friction between the support pin or a flange plate, which is connected to the support bolt, and the support pin, the rotatability of the arm relative to the housing frictionally.
  • the linear drive can be made particularly low-power and compact, when the boom is connected to a weight balancing device to compensate for the weight of at least a portion of the moving masses of the plug drive, and the weight compensation device is supported on the housing. As a result, at least a part of the weight of the moving masses of the plug drive, ie the lifting rod, the boom and the plug, compensated.
  • the weight compensation device has a mechanical, pneumatic or hydraulic compression spring, in particular a prestressable one.
  • Weight compensation is particularly efficient when the longitudinal axis of the compression spring is parallel to the direction of the lifting rod, i. vertically, is aligned.
  • the position of the compression spring is determined by a spring cup and a spring holder, wherein preferably the spring cup with the support bolt and the spring holder is connected to the housing.
  • the spring holder guides the compression spring on its inner circumferential surface; the spring cup guides the torsion spring on its outer lateral surface.
  • a longitudinal section of the cantilever and / or the linear drive is at least partially enclosed by a radiation protection plate.
  • the thrust spindle by means of a mechanical connecting element is pluggable connected to the lifting rod.
  • the plug-in mechanical fastener e.g., a stud threadedly connected to the push spindle engaging, for example, a transverse groove in the lift rod
  • the drive can also remain on the plug drive, so that only the electrical connector must be connected.
  • the nominal force F Nenn is understood to mean a contact pressure of the plug on the perforated brick, which the linear drive can apply without the plug, the perforated brick or the linear drive itself being damaged.
  • the holding time is 2 s ⁇ t hold ⁇ 60 s, preferably 5 s ⁇ t hold ⁇ 20 s . This will ensure that the plug settles in the block, thereby reducing mechanical roughness between the plug and the block.
  • each plug drive 1 serves to adjust the outflow of liquid metal, specifically liquid steel, from the distributor 3.
  • the flow of liquid steel through an unillustrated orifice in the distributor tray can be fully closed, fully opened, or adjusted to any value therebetween.
  • Each plug drive 1 consists essentially of a liftable and lowerable lifting rod 4, which is connected to a boom 5.
  • the boom 5 can be connected to a plug 2, so that a lifting and lowering movement of the lifting rod 2 is transmitted to the boom 5, and from the boom 5 to the plug 2.
  • the lifting rod 4 can either by the linear drive 10 or by means of Hand levers 16 are moved.
  • the outflow from the distributor can be automated, for example flow-controlled, adjusted.
  • the outflow from the distributor 3 is manually adjusted by the hand lever 16.
  • both the linear drive 10 and the hand lever 16 is connected to the lifting rod 4. From the representations of FIGS. 1 and 2 shows that the distributor 3 of a continuous casting plant for long products builds relatively low, so that the linear drive 10 - which is arranged in the concrete case "in-line" with the longitudinal axis 11 of the lifting rod 4 - must be designed to be particularly compact.
  • FIGS. 3 and 4 show a distributor of a continuous casting plant for flat products, specifically for slabs. Unlike the distributor of FIGS. 1 and 2 , the distributor 3 of the FIGS. 3 and 4 a much larger height.
  • the plug drive 1 is shown in more detail.
  • the lifting rod 4, not shown, is at least partially surrounded by a housing 6, wherein the housing can be attached via the tub supports 8 to the manifold.
  • the plug 2, which consists of refractory material (eg ceramic material), is fastened via a screw connection to the outer end of the extension arm 5. Between the housing 6 and the lifting rod 4 two guide elements are integrated, so that an accurate, low-friction guidance of the lifting rod is guaranteed.
  • radiation protection plates 22 are provided which protect these components from radiant heat.
  • a visual height indicator 23 is shown in the form of a ruler, so that an operator of the manual operation of the plug 2, as well as in automatic mode, an indication of its location is available.
  • the Operating personnel also provided a digital indication of the stopper opening.
  • Fig. 7 is an operator on G foolbühenlomi that adjusts the outflow from a manifold 3 manually.
  • the operator moves by means of the hand lever 16, the lifting rod 4, wherein a force increase of about 8 is achieved by the dimensions of the lever lengths of the hand lever 16 and the lever tabs 17.
  • the hand lever 17 can be easily removed from the lever tab 16, so that the hand lever when lifting the distributor 3 by means of a crane, not shown, does not constitute a hindrance.
  • the hand lever 17 can be swiveled ⁇ 90 ° (see FIG. 12 ) educated.
  • the linear drive 10 and the connection of the linear drive 10 to the lifting rod 4 are shown in more detail.
  • the linear drive comprises an AC hollow shaft servomotor 12, a resolver 24, a gear 13 designed as a spindle nut, and a ball screw as a push spindle 14.
  • the rotational movement of the rotor of the electric motor 12 is converted by the gear 13 in a translational movement of the thrust spindle 14, wherein the thrust spindle 14 is connected by means of a mechanical connecting element 15 with the lifting rod 4.
  • the lever 16 is connected via lever tabs 17 which are supported on the housing 6 via a rotatable ring 6 a, with the lifting rod 4.
  • the ring 6a is axially secured on the housing, but rotatable by 180 °, so that an operator can take different positions relative to the plug drive.
  • the connecting element 15 is designed as a cross pin, which engages positively in a likewise aligned transversely to the longitudinal axis 11 groove in the lifting rod 4. Further details are the FIG. 10 and 13 refer to.
  • FIG. 9 the anti-rotation of the boom 5 is shown, wherein the boom 5 by means of two Torque supports is secured against rotation.
  • the housing 6 is connected to a guide pin 18 oriented parallel to the longitudinal axis 11 of the lifting rod 4.
  • the guide pin 18 in conjunction with the guide portion 19 defines the allowable rotational movement of the boom 5 relative to the housing 6 positively, so that it is a form-fitting torque arm.
  • the guide region 19 is formed as a groove, wherein the groove covers a segment of a concentric circle about the longitudinal axis 11. This choice of guide range allows for limited cantilever rotation relative to the housing, which is preferably used on long product distributors (see also US Pat FIG.
  • the boom 5 is supported via the flange plate 28 and the support bolt 27 on the housing 6, wherein the flange plate 28 is pressed against the boom 5 via the prestressable compression spring 21.
  • This torsional moments are frictionally supported so that it is a frictional torque arm.
  • the compression spring 21, whose position is determined on the one hand by a spring holder 25 and the other by a spring cup 26, not only serves to form a positive torque arm; Rather, the compression spring 21 also serves as a weight balancing device 21, which compensates for the weight of at least part of the plug drive 1. Due to the weight compensation, the linear drive can be made more compact and less powerful.
  • Fig. 11 shows the rotation of FIG. 9 in a sectional view.
  • the weight compensation device 20 is designed as a prestressable compression spring 21, which is aligned parallel to the longitudinal axis 11. By the compression spring, the moving masses of the lifting rod 4, the boom 5 and the plug, not shown, partially compensated, so that the linear drive only a reduced force for Shift must apply.
  • the compression spring 21 is held and guided on the underside by a spring holder 25 in the form of a threaded pin; on the top is the compression spring in a spring cup 26, so that a lateral deflection of the compression spring 21 is excluded.
  • Fig. 13 the connection between the linear drive 10 and the lifting rod 4 is shown enlarged.
  • the thrust spindle 14 is connected to the lifting rod 4 via a mechanical connecting element 15, which is designed as a transverse pin lying transversely to the longitudinal axis of the linear drive 10.
  • the cross pin engages in a flat transverse groove in the lifting rod 4, so that the thrust spindle 14 is pluggable connected to the lifting rod 4.
  • an electrical connector that connects the power electronics - eg a frequency converter - with the linear drive 10.
  • the connector has on the side facing away from the electric motor 12 two buttons, through which the thrust spindle 14 can be extended and retracted. This ensures that the linear drive 10 can be easily connected to the lifting rod 4.
  • FIG. 14 shows a schematic representation of the lifting forces F and stroke s of the linear drive 10 in the inventive control of the plug drive 1.
  • the plug 2 is in the open position, wherein the vertical distance between the plug 2 and the hole stone S Max .
  • the linear drive 10 is retracted at a slow speed, wherein the linear drive 10 decelerates the downward movement of the plug 2.
  • the linear drive 10 substantially absorbs the weight of the moving masses of the plug drive 1 and the plug 2, ie, the liner drive presses on the lifting rod.
  • the linear drive 10 pushes the plug 2, wherein at the time t 9, the linear drive reaches a position s> S 0 , so that the outflow from the distributor is opened.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
EP11183395A 2011-09-30 2011-09-30 Entraînement de bouchon électromagnétique Withdrawn EP2574414A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11183395A EP2574414A1 (fr) 2011-09-30 2011-09-30 Entraînement de bouchon électromagnétique
PCT/EP2012/069015 WO2013045520A1 (fr) 2011-09-30 2012-09-27 Dispositif d'entraînement électromécanique pour un bouchon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11183395A EP2574414A1 (fr) 2011-09-30 2011-09-30 Entraînement de bouchon électromagnétique

Publications (1)

Publication Number Publication Date
EP2574414A1 true EP2574414A1 (fr) 2013-04-03

Family

ID=47002844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11183395A Withdrawn EP2574414A1 (fr) 2011-09-30 2011-09-30 Entraînement de bouchon électromagnétique

Country Status (2)

Country Link
EP (1) EP2574414A1 (fr)
WO (1) WO2013045520A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3231532A1 (fr) * 2016-04-12 2017-10-18 Primetals Technologies Austria GmbH Procédé de démarrage et d'arrêt d'une machine à fondre plusieurs filets, entraînement de garniture et machine à fondre plusieurs filets
CN108568515A (zh) * 2018-06-14 2018-09-25 刘中原 一种精确对准塞棒装置及中间包塞棒对准工艺
WO2023194602A1 (fr) * 2022-04-08 2023-10-12 Vesuvius - Sert, Sas Dispositif de commande pour une quenouille de coulée de cuve métallurgique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013218345B4 (de) 2013-09-12 2021-02-04 Sms Group Gmbh Vorrichtung zum Verschließen einer Abflussöffnung in einem metallurgischen Gefäß
CN106694865A (zh) * 2017-02-06 2017-05-24 浙江杭机铸造有限公司 一种座包拔塞装置
AT527598B1 (de) * 2024-03-05 2025-04-15 Sheffield Hi Tech Refractories Germany Gmbh Stopfenhalterung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421344A1 (de) * 1984-06-08 1985-12-12 Krupp Stahl Ag, 4630 Bochum Verfahren und vorrichtung zum automatischen fuellen einer stranggiesskokille beim angiessen eines stranges
JPH02220751A (ja) * 1989-02-21 1990-09-03 Nippon Steel Corp 連続鋳造機の鋳込み制御装置および制御方法
US4953761A (en) * 1988-09-27 1990-09-04 Inductotherm Corp. Stopper rod spatial control mechanism
US5312090A (en) * 1992-12-14 1994-05-17 Cmi International Apparatus and method for controlling a stopper rod of a bottom pouring vessel
JPH06328230A (ja) * 1993-05-19 1994-11-29 Kubota Corp 溶湯保持炉の出湯部
EP0734801A1 (fr) * 1995-03-28 1996-10-02 Concast Standard Ag Dispositif pour régler une alimentation de métal avec un tampon
EP1819466B1 (fr) 2004-11-30 2009-07-15 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif de commande d'une quenouille de coulee
US20100282784A1 (en) * 2009-05-10 2010-11-11 Paiva Marcelo Albano Stopper Rod Positioning and Control Apparatus for Control of Molten Metal Flow Through a Nozzle
CN201735786U (zh) * 2010-08-26 2011-02-09 西安秦翔科技有限责任公司 一种丝杠—电机伺服自动控制塞棒调节执行装置
EP1426126B1 (fr) 2002-12-04 2011-03-23 Societe D'etudes Et De Realisations Techniques S.E.R.T. Ensemble de commande d'un obturateur appartenant à une installation de coulée continue, et installation de coulée continue correspondante

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421344A1 (de) * 1984-06-08 1985-12-12 Krupp Stahl Ag, 4630 Bochum Verfahren und vorrichtung zum automatischen fuellen einer stranggiesskokille beim angiessen eines stranges
US4953761A (en) * 1988-09-27 1990-09-04 Inductotherm Corp. Stopper rod spatial control mechanism
JPH02220751A (ja) * 1989-02-21 1990-09-03 Nippon Steel Corp 連続鋳造機の鋳込み制御装置および制御方法
US5312090A (en) * 1992-12-14 1994-05-17 Cmi International Apparatus and method for controlling a stopper rod of a bottom pouring vessel
JPH06328230A (ja) * 1993-05-19 1994-11-29 Kubota Corp 溶湯保持炉の出湯部
EP0734801A1 (fr) * 1995-03-28 1996-10-02 Concast Standard Ag Dispositif pour régler une alimentation de métal avec un tampon
EP1426126B1 (fr) 2002-12-04 2011-03-23 Societe D'etudes Et De Realisations Techniques S.E.R.T. Ensemble de commande d'un obturateur appartenant à une installation de coulée continue, et installation de coulée continue correspondante
EP1819466B1 (fr) 2004-11-30 2009-07-15 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif de commande d'une quenouille de coulee
US20100282784A1 (en) * 2009-05-10 2010-11-11 Paiva Marcelo Albano Stopper Rod Positioning and Control Apparatus for Control of Molten Metal Flow Through a Nozzle
CN201735786U (zh) * 2010-08-26 2011-02-09 西安秦翔科技有限责任公司 一种丝杠—电机伺服自动控制塞棒调节执行装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3231532A1 (fr) * 2016-04-12 2017-10-18 Primetals Technologies Austria GmbH Procédé de démarrage et d'arrêt d'une machine à fondre plusieurs filets, entraînement de garniture et machine à fondre plusieurs filets
CN108568515A (zh) * 2018-06-14 2018-09-25 刘中原 一种精确对准塞棒装置及中间包塞棒对准工艺
WO2023194602A1 (fr) * 2022-04-08 2023-10-12 Vesuvius - Sert, Sas Dispositif de commande pour une quenouille de coulée de cuve métallurgique

Also Published As

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