JP2007054849A - Sliding nozzle mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding nozzle having a compact structure, in which the uneven wearing of a refractory plate is reduced at the sliding time, and a work at the exchanging time of the refractory plate is allowed to be safely and simply performed. <P>SOLUTION: On the end surface at an arm bracket 14 side of a fixed metal frame 3, a guide bracket 16 having parallel and mutually facing two guide grooves 15 in the sliding direction of a lower plate 5 is installed. On both side surfaces of a connecting metal material 9, a liner 17 for slidably engaged with the guide grooves 15 in this guide bracket 16, and the connecting metal material 9 is slidably held in the parallel direction to the sliding direction of the plate by engaging this liner 17 with the guiding grooves 15 in the guide bracket 16. In the connecting metal material 9, a length adjusting device 21 is fitted, and at the end part of the plate side in the connecting metal material 9, a T-shaped projecting part 18 composed of a neck part formed as semi-circular plate to a head part and the head part, is formed. Also, in the sliding metal frame 6, an engaging hole 19 for engaging and restraining the projecting part 18, is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sliding nozzle device for adjusting the flow rate of molten metal discharged from a molten metal container.

  As shown in FIG. 4, this sliding nozzle device is usually installed under the upper nozzle at the bottom of the molten metal container 1, and a fixed metal frame 3 that holds the upper plate 2, and the fixed metal frame 3. On the other hand, the opening / closing metal frame 4 provided to be openable / closable, the slide metal frame 6 holding the lower plate 5 provided between the fixed metal frame 3 and the opening / closing metal frame 4, and the lower plate 5 with respect to the upper plate 2. It consists of an elastic body (not shown) that presses, and by sliding the slide metal frame 6, the degree of opening according to the positions of the nozzle holes 7 and 8 formed in the upper plate 2 and the lower plate 5 is adjusted to adjust the molten metal. The flow rate is adjusted. In order to adjust the flow rate of the molten metal, an actuator 10 for sliding the slide metal frame 6 for sliding the lower plate 5 is attached to the molten metal container 1.

  As a type of attachment of the actuator 10 to the molten metal container, there are a case where it is attached to the bottom of the molten metal container and a case where it is attached to the side surface of the molten metal container. What is shown shows an example in which the actuator 10 is provided on the side surface of the molten metal container 1.

  The drive mechanism and operation when the actuator 10 is attached to the side surface of the molten metal container will be described below with reference to FIG.

  The actuator 10 is pivotally attached to a fixed plate 11 fixed to the side surface of the molten metal container 1. The tip of the rod 13 of the actuator 10 is connected to one end of a substantially triangular arm bracket 14 pivotally attached to the fixed plate 11. The other end of the arm bracket 14 is connected to the slide metal frame 6 by a connection pin 42 via a length adjuster 41 for positioning a plate pivotally attached to the end of the slide metal frame 6. Has a structure.

  This length adjuster 41 adjusts the variation in the dimensions of the plate during manufacture and the variation in the mounting position on the slide metal frame 6, and the upper and lower nozzle holes 7 and 8 match at the position where the actuator 10 is reduced. Thus, the position of the slide metal frame 6 is adjusted.

  When the actuator rod 13 is extended and advanced by the operation of the actuator 10, the arm bracket 14 is rotated clockwise with respect to the pivot shaft 12 as a fulcrum. By this rotation of the arm bracket 14, the slide metal frame 6 advances leftward on the paper surface, and the nozzle hole 8 of the lower plate 5 that slides relative to the nozzle hole 7 of the fixed upper plate 2 is displaced. The communication between the nozzle holes is cut off and the pouring of molten metal is stopped.

  On the other hand, when the actuator rod 13 contracts and retracts, the arm bracket 14 rotates counterclockwise about the pivot shaft 12 as a fulcrum. As a result, the slide metal frame 6 retreats in the right direction, and the nozzle holes 7 and 8 of the upper plate 2 and the lower plate 5 are made to coincide with each other so that the nozzle holes are fully opened and the molten metal in the molten metal container 1 is poured out. become.

  In this sliding nozzle device, there is a problem that occurs because the sliding surfaces of the upper and lower plates 2 and 5 wear due to friction.

  The first problem is a problem that occurs when the refractory plates 2 and 5 are periodically replaced because they are worn by the contact slide. When the plate is replaced, the molten metal container 1 is tilted sideways, and at that time, the actuator 10 is positioned below or above the molten metal container 1, and in order to remove the plate from the metal frame. It is necessary to manually remove the pin 42 connecting the length adjuster 41 to release the connection with the arm bracket 14 and open the slide metal frame 6. The operation for removing the pin 42 is a manual operation, which is not only labor-intensive, but is an operation directly above or immediately below a container in a high heat state, which has a poor working environment and sometimes involves danger.

  The second problem is a problem of uneven wear of the plate during the operation of the sliding nozzle. Since the arm bracket 14 for driving the slide metal frame is swung with the pivot shaft 12 as a fulcrum, the lower plate 5 cannot be moved horizontally precisely, and the front end portion thereof is stronger than the rear end portion. As a result of sliding while contacting with each other, uneven wear occurs on the contact surfaces of the upper plate 2 and the lower plate 5, and it is necessary to frequently replace both plates. Therefore, it is necessary to reserve a large number of replacement plates. And the cost is high.

  Therefore, in Patent Document 1, the plate replacement operation is simplified by eliminating the manual removal operation of the pins connecting the slide metal frame and the arm bracket side when the upper and lower plates are replaced in this conventional sliding nozzle device. A structure having a connecting member including a length adjuster has been proposed as a sliding nozzle driving device for preventing uneven wear of the plate.

  In the apparatus according to this proposal, as shown in FIG. 5, a connecting member 52 having a plurality of pairs of upper wheels 51 disposed on the upper surface is arranged between the slide metal frame 6 and the arm bracket 14 shown in FIG. A rail 53 is constructed so as to extend from the side of the molten metal container in the same direction as the sliding direction of the lower plate 5, and the connecting member 52 is suspended by the upper wheel 51 so as to be able to run. The connecting member 52 is formed by integrating a first member 55 provided with a downwardly opening type locking portion 54 and a second member 56 for connecting an arm bracket via a length adjuster 57. The connecting shaft provided at the base end of the slide metal frame 6 is engaged with the locking portion 54 of the lower open type provided in the first member 55 of the connecting member 52.

  With such a structure, the connecting member 52 moves horizontally along the rail 53, and the lower plate 5 slides horizontally, so that uneven wear of the plate is prevented. When replacing the plate, the connecting shaft of the slide metal frame 6 is pulled downward from the engaging portion, so that the lower plate 5 can be easily removed.

  However, in the structure having a connecting member including the length adjuster, the connecting member has a rail and other absorption mechanisms and the like, so that there is a problem that the entire length becomes long and the entire apparatus becomes large.

For this reason, the positional relationship between the mounting position of the actuator and the nozzle hole is limited, the size of the ladle used is limited, and in fact it can only be attached to some ladles. Most ladles require major modifications and are difficult to implement.
Japanese Patent No.3051294

  The present invention provides a compact structure in a sliding nozzle device that can reduce uneven wear of a refractory plate during sliding and can safely and easily perform work when replacing the refractory plate.

  The present invention relates to a sliding nozzle device in which a slide metal frame is driven by an arm bracket that is oscillated by an actuator provided on a side surface of a molten metal container. , And the movement of the slide metal frame by the swing drive of the arm bracket of the connecting hardware can be moved horizontally, so that the lower plate is moved in parallel to the upper plate.

  That is, the present invention provides a fixed metal frame for holding an upper plate fixed to the bottom of a molten metal container, an opening / closing metal frame disposed below the fixed metal frame, and between the fixed metal frame and the opening / closing metal frame. A slide metal frame that holds the lower plate disposed on the elastic plate and an elastic body provided between the fixed metal frame and the opening / closing metal frame. The slide metal frame is rotated by an actuator provided on a side surface of the molten metal container. In a sliding nozzle device connected via an arm bracket that is oscillated by a moving arm bracket and a length adjuster, the end surface of the fixed metal frame on the arm bracket side is parallel to the sliding direction of the lower plate and is mutually connected. A guide bracket is formed with two guide grooves facing each other, and between the length adjuster and the slide metal frame, a connecting hardware with liners protruding on both sides is arranged. The liner projecting on both sides of the coupling hardware is slidably fitted in the guide groove of the guide bracket, and the coupling hardware is held slidable in the direction parallel to the sliding direction of the plate. Features.

  A guide bracket having a guide groove parallel to the sliding direction of the lower plate is provided at the end of the fixed metal frame on the arm bracket side, and the guide groove of the guide bracket is connected to the slide metal frame and the length adjuster. Therefore, the slide surface of the plate is not subject to uneven wear, and the connection between the slide metal frame and the arm bracket has a compact structure.

  Embodiments of the present invention will be described based on examples.

  1 to 3 show an embodiment of the present invention. In these drawings, FIG. 1 is a diagram in which the connecting portion between the arm bracket 14 and the slide metal frame 6 is seen from the horizontal plane in the sliding nozzle device shown in FIG. 4, and FIG. 2 is the same as FIG. The cross section seen from the AA line shown to a figure is shown. FIG. 3 shows a configuration diagram of the assembly member, but for the convenience of drawing, the fixed metal frame 3 is arranged on the lower side and the slide metal frame 6 is arranged on the upper side.

  In these drawings, reference numeral 9 denotes a connecting hardware disposed between the length adjuster 21 and the slide metal frame 6.

  A guide bracket 16 having two guide grooves 15 that are parallel to the sliding direction of the lower plate 5 and that face each other is provided on the end surface of the fixed metal frame 3 on the actuator side, that is, on the arm bracket 14 side.

  A liner 17 is slidably fitted to the guide groove 15 of the guide bracket 16 on both side surfaces of the connecting hardware 9. The liner 17 is fitted into the guide groove 15 of the guide bracket 16. By joining, the connecting hardware 9 is slidably held in a direction parallel to the sliding direction of the plate.

  As shown in FIG. 3, the liner 17 projecting on both side surfaces of the connecting hardware 9 is formed of a wear-resistant material in which a ridge portion of a rectangular parallelepiped is rounded and a vertical section has an oval shape. . The R chamfering of the liner 17 is performed by tilting the arm bracket 14 so that the liner 17 is inclined in the guide groove 15 instead of being in a horizontal state. Therefore, two diagonal ridges are formed on the upper and lower surfaces of the guide groove 15 in the rectangular parallelepiped. This is for avoiding the problem that the frictional resistance is increased due to the contact, and it becomes caught and cannot slide. In this manner, by chamfering the edge of the liner 17, the frictional resistance with the upper and lower surfaces of the guide groove is reduced, and the slide metal frame 6 can be moved smoothly.

  The liners 17 formed on both side surfaces of the connecting hardware 9 are detachably attached by screws so that they can be replaced when the life due to wear comes. In general, the liner 17 preferably has a length of 50 to 150 mm and a thickness of 10 to 40 mm from the viewpoint of wear rate and overall size.

  Further, a T-shaped projecting portion 18 formed of a neck portion and a head portion having a head portion formed in a semi-disc shape is formed at an end portion on the plate side of the connection hardware 9. On the other hand, the slide metal frame 6 is formed with a fitting hole 19 for fitting and locking the protruding portion 18. When the opening / closing metal frame 4 is closed from the state in which the opening / closing metal frame 4 shown in FIG. 4 is opened, the protruding portion 18 formed on the connection metal 9 is connected to the fitting hole 19 of the slide metal frame. . Further, when the opening and closing metal frame 4 is opened, the slide metal frame 6 held by the opening and closing metal frame 6 is opened, and the connection with the connection hardware 9 is released, so that it is not necessary to attach and detach the arm bracket 14 when opening and closing.

  Reference numeral 20 denotes a through hole formed in the lower central portion of the connecting hardware 1, and the length adjuster 21 is pivoted by passing the connecting shaft 26 through the through hole 20.

  As shown in FIG. 3, the length adjuster 21 includes a slide-side fork end 22, an arm-side foam end 23, and a connecting rod 24. As shown in the figure, the connecting rod 24 has male screws that can be tightened in the same rotational direction at both ends with right and left screws, respectively, and one end of the connecting rod 24 is screwed to the slide-side fork end 22. The other end is combined with the arm-side fork end 23. One end of the arm-side fork end 23 is pivotally attached to the arm bracket 14 by a pin 25, and the slide-side fork end 22 is pivotally attached to the connection hardware 9 by a connection shaft 26.

  As described with reference to FIG. 4, the lower plate 5 slides relative to the upper plate 2 by the operation of the actuator 10 by the mechanism configured as described above. At that time, when the lower plate 5 moves, the arcuate swing of the arm bracket 14 is received by the length adjuster 21 to drive the connecting hardware 9 connected to the other end of the length adjuster. At this time, since both ends of the length adjuster 21 are pivotally attached by the pin 25 and the connecting shaft 26, the length adjuster 21 moves in a slightly tilted state, and the connecting hardware 9 is not in a direction parallel to the upper play. Alternatively, the driving force is transmitted in a direction slightly shifted downward. However, the liner 17 in which the connecting hardware 9 protrudes on both side surfaces thereof moves in the guide groove 15 of the guide bracket 16 substantially parallel to the driving direction. For this reason, the arc-shaped rocking | fluctuation by the arm bracket 14 with respect to the connection metal fitting 9 is corrected to the movement of a substantially parallel direction with an upper plate. Accordingly, the slide metal frame 6 fitted to the connecting metal piece 9 is also driven in a direction parallel to the upper plate, so that uneven wear of the upper plate 2 and the lower plate 5 is prevented.

  And since the connection metal fitting 9 is provided between the length adjuster 21 and the slide metal frame 6, it becomes possible to make the whole apparatus compact. Further, since the rotating mechanism is not provided, there is no occurrence of sliding failure of the slide due to rotation failure due to deterioration of metal such as heat reception or adhesion of dust.

  In addition, the replacement of the upper plate and the lower plate is made so that the connection between the connection metal 9 and the slide metal frame 6 can be released simply by opening the opening / closing metal frame 4, so that a safe and reliable operation is possible. It becomes.

It is the figure which looked at the structure of the connection hardware part of the sliding nozzle apparatus of this invention from the plane. The cross-sectional structure by the AA line of FIG. 1 is shown. The assembly block diagram for the connection hardware part of this invention is shown. The structural example of a sliding nozzle apparatus is shown. The connection mechanism with the arm bracket with the slide metal frame in the sliding nozzle apparatus in a prior art is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container for molten metal 2 Upper plate 3 Fixed metal frame 4 Opening / closing metal frame 5 Lower plate 6 Slide metal frame 7, 8 Nozzle hole 9 Connecting metal
DESCRIPTION OF SYMBOLS 10 Actuator 11 Fixed plate 12 Pivoting shaft 13 Actuator rod 14 Arm bracket 15 Guide groove 16 Guide bracket 17 Liner 18 Protrusion 19 Fitting hole 20 Through-hole 21 Length adjuster 22 Slide side fork end 23 Arm side foam end 24 Connection Rod 25 pin 26 connecting shaft

Claims (2)

A fixed metal frame for holding an upper plate fixed to the bottom of the molten metal container, an open / close metal frame disposed below the fixed metal frame, and a lower plate disposed between the fixed metal frame and the open / close metal frame A slide metal frame that holds the metal frame and an elastic body provided between the fixed metal frame and the open / close metal frame, and the slide metal frame is swayed by an arm bracket that is rotated by an actuator provided on a side surface of the molten metal container. In a sliding nozzle device connected via an arm bracket that is dynamically driven and a length adjuster,
A guide bracket having two guide grooves formed parallel to the sliding direction of the lower plate and facing each other is provided on the end surface of the fixed metal frame on the arm bracket side, and between the arm bracket and the slide metal frame, Between them, the connecting hardware with liners protruding on both sides is arranged,
A sliding nozzle device in which liners projecting on both side surfaces of a coupling hardware are slidably fitted into guide grooves of a length adjuster, and the coupling hardware is slidably held in a direction parallel to the sliding direction of the plate.   The sliding nozzle device according to claim 1, wherein ridge portions of the liner projecting on both sides of the connecting hardware are rounded.

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