WO2001068295A1 - Arrangement for control device - Google Patents

Arrangement for control device Download PDF

Info

Publication number
WO2001068295A1
WO2001068295A1 PCT/SE2001/000401 SE0100401W WO0168295A1 WO 2001068295 A1 WO2001068295 A1 WO 2001068295A1 SE 0100401 W SE0100401 W SE 0100401W WO 0168295 A1 WO0168295 A1 WO 0168295A1
Authority
WO
WIPO (PCT)
Prior art keywords
guides
actuator
support
carriage
driving motor
Prior art date
Application number
PCT/SE2001/000401
Other languages
French (fr)
Inventor
Rolf Backberg
Original Assignee
Precimeter Ab
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 Precimeter Ab filed Critical Precimeter Ab
Priority to AU2001237851A priority Critical patent/AU2001237851A1/en
Publication of WO2001068295A1 publication Critical patent/WO2001068295A1/en

Links

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 adjusting device for actuators, and of the type being intended to perform on the one hand a linear regulating movement for positioning the actuator, and on the other hand an accelerated movement for displacement of the actuator between two end positions, of which one is the chosen regulating position, and which adjusting device comprises a support and a carriage displaceable along guide rails in the support by means of a driving device, and to which carriage the actuator is attached.
  • Adjusting devices of the type mentioned above are used i.a. to open and close a valve, through which molten metal flows.
  • the valve body is constituted of a ceramic rod passing through the charge and which in co-operation with the outlet opening of the melting crucible determining the through flow quantity as well as the opening- and the closing function.
  • Normal adjusting movement may occur by means of linear controls, e.g. with a ballnut screw, which is driven by a stepping motor.
  • the object of the invention is to provide an adjusting device of the type mentioned above, which
  • the construction is simple, and thereby, may be manufactured to a low cost
  • the driving motor being arranged on a motor bracket, the carriage being provided with a second set of guides arranged parallel to the first set of guides, the guide rails of the second set of guides being attached to said motor bracket, that a second driving motor is attached to the support and arranged by means of the displacement device to displace the motor bracket along the second set of guides, and that the displacement device of the second driving motor is designed to perform accelerated movements between two end positions.
  • Fig.1 shows the adjusting device of the invention in a side-view.
  • Fig.2 shows the adjusting device according to Fig. 1 in a front-view.
  • Fig. 3 shows a section along line III-III of Fig. 1.
  • the adjusting device -denoted by 11- comprises a console-shaped support 12, of which the rear 13 is intended to be attached to a wall or the like. Inside the support 12 a carriage 14 is vertically displaceable serving as a holder for a bar 15, which is transversely arranged at the upper end of the support. The carriage 14 is guided by means of a set of guides 16, of which the inner guide rails 17 are attached to the carriage, and the exterior guide rails 18 are attached to the support 12.
  • a second set of parallel guides 19 are attached to the carriage 14.
  • a driving motor 23 is arranged on the motor bracket 22, preferably a stepping motor, of which the output shaft 24 is a ballnut screw arranged to cooperate with a ballnut 25 which is attached to the console 26 of the support.
  • the console also supports a second driving motor 27, which is preferably a pneumatic piston cylinder 28, of which the piston rod 29 is connected to the motor bracket 22 by its free end.
  • An actuator 30 is clampable at the end of the bar 15 facing away from the adjusting device 11, which in the chosen embodiment is constituted by a component of a valve, which is not shown in greater detail.
  • the actuator 30 is the valve body of the valve and is constituted by a ceramic rod 31.
  • the first driving motor 23 is started as much as corresponds to the desired opening gap. This occurs via the ball screw 24 and the ballnut 25, which displace the carriage 14, and thereby the bar 15, and the rod 31 vertically upwards.
  • the second driving motor 27 is activated (air cylinder, spring cylinder or magnetic cylinder, alternatively), which via the piston rod 29, the motor bracket 22, the ballnut screw 24 and the ballnut 25 displaces the carriage 14 along the second guide 19, from one of its end positions to the opposite end position.
  • the invention is not limited to the embodiment shown, but the adjusting device can be varied within the scope of the appending claims.
  • the guides can be of another known type, provided that the movement is linear and free from play.
  • the driving motors can be operated with media other than electricity or pneumatics, e.g. the accelerated movement can be achieved magnetically.
  • the adjusting device can be provided with a position indicator for a feed-back coupling to an operative control system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Control Of Position Or Direction (AREA)
  • Transmission Devices (AREA)

Abstract

An adjusting device for an actuator (30) and of the type intended to perform on the one hand a linear regulating movement for positioning the actuator and, on the other hand, an accelerated movement for displacement of the actuator between two end positions, of which one is the chosen regulating position. The adjusting device (11) comprises a support (12) and a carriage (14) displaceable by means of a driving device along guide rails (17, 18), to which carriage (14) the actuator is attached. The driving motor (23) is arranged on a motor bracket movable relative to the support (12). The carriage (14) is provided with a second set of guides (19) arranged in parallel with the first set of guides (16). The rail guides (20, 21) of the second set of guides (19) are attached to said motor bracket (22). A second driving motor (27) is attached to the support (12) and arranged by means of its displacement device (29) to displace the motor bracket (22) along the second set of guides (20, 21), and that the displacement device (29) of the second driving motor (27) is designed to perform accelerated movements between two end positions.

Description

Title
ARRANGEMENT FOR CONTROL DEVICE
TECHNICAL AREA
The present invention relates to an adjusting device for actuators, and of the type being intended to perform on the one hand a linear regulating movement for positioning the actuator, and on the other hand an accelerated movement for displacement of the actuator between two end positions, of which one is the chosen regulating position, and which adjusting device comprises a support and a carriage displaceable along guide rails in the support by means of a driving device, and to which carriage the actuator is attached.
THE BACKGROUND OF THE INVENTION AND THE PROBLEM
Adjusting devices of the type mentioned above are used i.a. to open and close a valve, through which molten metal flows. In this case the valve body is constituted of a ceramic rod passing through the charge and which in co-operation with the outlet opening of the melting crucible determining the through flow quantity as well as the opening- and the closing function. Normal adjusting movement may occur by means of linear controls, e.g. with a ballnut screw, which is driven by a stepping motor.
It occurs that an accelerated effort is necessary for closing or opening the valve, something which is not possible with the normal adjusting movement, which is slow and focussed on a relatively exact positioning. THE OBJECT OF THE INVENTION AND THE SOLUTION OF THE PROBLEM
The object of the invention is to provide an adjusting device of the type mentioned above, which
• in one and the same construction has combined the accurate positioning of the actuator and the accelerated movement,
the construction is simple, and thereby, may be manufactured to a low cost, and
is reliable.
These objects have been solved by means of the driving motor being arranged on a motor bracket, the carriage being provided with a second set of guides arranged parallel to the first set of guides, the guide rails of the second set of guides being attached to said motor bracket, that a second driving motor is attached to the support and arranged by means of the displacement device to displace the motor bracket along the second set of guides, and that the displacement device of the second driving motor is designed to perform accelerated movements between two end positions.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the invention will be described with reference to an embodiment according to the enclosed drawings, in which:
Fig.1 shows the adjusting device of the invention in a side-view.
Fig.2 shows the adjusting device according to Fig. 1 in a front-view.
Fig. 3 shows a section along line III-III of Fig. 1. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The adjusting device -denoted by 11- comprises a console-shaped support 12, of which the rear 13 is intended to be attached to a wall or the like. Inside the support 12 a carriage 14 is vertically displaceable serving as a holder for a bar 15, which is transversely arranged at the upper end of the support. The carriage 14 is guided by means of a set of guides 16, of which the inner guide rails 17 are attached to the carriage, and the exterior guide rails 18 are attached to the support 12.
A second set of parallel guides 19 are attached to the carriage 14. The inner guide rails
20 of the guides 19 are attached to the carriage, and the free ends of the exterior guide rails 21 of the guides 19 are attached to a motor bracket 22, which is located below the support. A driving motor 23 is arranged on the motor bracket 22, preferably a stepping motor, of which the output shaft 24 is a ballnut screw arranged to cooperate with a ballnut 25 which is attached to the console 26 of the support. The console also supports a second driving motor 27, which is preferably a pneumatic piston cylinder 28, of which the piston rod 29 is connected to the motor bracket 22 by its free end.
An actuator 30 is clampable at the end of the bar 15 facing away from the adjusting device 11, which in the chosen embodiment is constituted by a component of a valve, which is not shown in greater detail. The actuator 30 is the valve body of the valve and is constituted by a ceramic rod 31.
During normal regulating movement, e.g. for opening the valve by lifting the ceramic rod 31, the first driving motor 23 is started as much as corresponds to the desired opening gap. This occurs via the ball screw 24 and the ballnut 25, which displace the carriage 14, and thereby the bar 15, and the rod 31 vertically upwards. In, for instance an emergency situation, when an accelerated closing or opening of the valve must be accomplished, the second driving motor 27 is activated (air cylinder, spring cylinder or magnetic cylinder, alternatively), which via the piston rod 29, the motor bracket 22, the ballnut screw 24 and the ballnut 25 displaces the carriage 14 along the second guide 19, from one of its end positions to the opposite end position. The invention is not limited to the embodiment shown, but the adjusting device can be varied within the scope of the appending claims. Thus, the guides can be of another known type, provided that the movement is linear and free from play. Further, the driving motors can be operated with media other than electricity or pneumatics, e.g. the accelerated movement can be achieved magnetically. Also, the adjusting device can be provided with a position indicator for a feed-back coupling to an operative control system.
11 adjusting device
12 support
13 rear
14 carriage
15 bar
16 1st guide
17, 18 interior and exterior guide rails
19 2nd guide
20, 21 interior and exterior guide rails
22 motor bracket
23 driving motor
24 ballnut screw
25 ballnut
26 console
27 2nd driving motor
28 piston cylinder
29 piston rod
30 actuator
31 ceramic rod

Claims

1. An adjusting device for an actuator (30) and of the type intended to perform on the one hand a linear regulating movement for positioning the actuator and, on the other hand, an accelerated movement for displacement of the actuator between two end positions, of which one is the chosen regulating position, and which adjusting device (11) comprises a support (12) and a carriage (14) displaceable by means of a driving device along guide rails (17, 18), to which carriage (14) the actuator is attached, characterised in that the driving motor (23) is arranged on a motor bracket movable relative to the support (12), that the carriage (14) is provided with a second set of guides (19) arranged in parallel with the first set of guides (16), that the rail guides (20, 21) of the second set of guides (19) are attached to said motor bracket (22), that a second driving motor (27) is attached to the support (12) and arranged by means of its displacement device (29) to displace the motor bracket (22) along the second set of guides (20, 21), and that the displacement device (29) of the second driving motor (27) is designed to perform accelerated movements between two end positions.
2. An adjusting device as claimed in claim 1, characterised in, that the support (12) is provided with a console (26) for carrying the second driving motor (27) and the displacement devices (24, 25) of the first driving motor (23).
PCT/SE2001/000401 2000-03-17 2001-02-23 Arrangement for control device WO2001068295A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001237851A AU2001237851A1 (en) 2000-03-17 2001-02-23 Arrangement for control device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0000884A SE516051C2 (en) 2000-03-17 2000-03-17 Actuators for actuators
SE0000884-7 2000-03-17

Publications (1)

Publication Number Publication Date
WO2001068295A1 true WO2001068295A1 (en) 2001-09-20

Family

ID=20278843

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/000401 WO2001068295A1 (en) 2000-03-17 2001-02-23 Arrangement for control device

Country Status (3)

Country Link
AU (1) AU2001237851A1 (en)
SE (1) SE516051C2 (en)
WO (1) WO2001068295A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333764A (en) * 1993-05-19 1994-08-02 Csi Industrial Systems, Corp. Ladle stopper rod control arrangement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333764A (en) * 1993-05-19 1994-08-02 Csi Industrial Systems, Corp. Ladle stopper rod control arrangement

Also Published As

Publication number Publication date
AU2001237851A1 (en) 2001-09-24
SE0000884L (en) 2001-09-18
SE516051C2 (en) 2001-11-12
SE0000884D0 (en) 2000-03-17

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