JP2011212704A - Sliding nozzle apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding nozzle apparatus using an intermediate rod in order to be attachable/detachable to/from a driving mechanism, wherein the intermediate rod is prevented from falling off when changing a plate.SOLUTION: The sliding nozzle apparatus includes a fixed metal frame 2 fixed to a bottom part of a molten metal container 1, an opening/closing metal frame 3 which is openably/closably connected to the fixed metal frame, a sliding metal frame 4 which is slidably arranged in the opening/closing metal frame, and an intermediate rod 10. One end 10a of the intermediate rod is attachably/detachably fitted to the sliding metal frame, and the other end 10b of the intermediate rod is attachably/detachably fitted to the driving mechanism 11 for sliding the sliding metal frame. An engagement part 10c to be engaged with an intermediate rod supporter for supporting the intermediate rod is provided on the intermediate rod.

Description

  The present invention relates to a sliding nozzle device (hereinafter referred to as “SN device”).

  The SN device is widely used in molten metal containers such as ladle and tundish because it has an advantage that the flow rate of molten metal can be accurately controlled. The SN device includes a fixed metal frame fixed to the bottom of the molten metal container, an open / close metal frame connected to the fixed metal frame so as to be openable and closable, and a sliding metal frame slidably disposed on the open / close metal frame. Equipped with two or three plates on these metal frames, and after applying a surface pressure between the plates, sliding the sliding metal frame with a drive mechanism such as a hydraulic cylinder, Control of the flow rate of the molten metal is performed (see, for example, Patent Document 1).

  Conventionally, the SN device and the drive mechanism are fixed to a molten metal container. For this reason, when a molten metal container is put in a vacuum processing tank and vacuum degassing is performed on the molten metal, the drive mechanism fixed to the molten metal container is exposed to high temperature in the vacuum processing tank, and then the drive mechanism It was the cause of trouble. Therefore, the use of detachable drive mechanisms is increasing. In this case, for reasons such as workability and safety, the drive mechanism is installed at a position protruding from the bottom of the molten metal container. Therefore, an intermediate rod serving as a joint is provided in the molten metal container, one end of this intermediate rod is detachably attached to the sliding metal frame, and the other end is detachably attached to the drive mechanism.

  By the way, in the SN device, the plates are periodically exchanged. Since this plate exchange operation is performed by tilting the molten metal container, the SN device is turned 90 ° from the posture at the time of use, so that the plate stands vertically. In addition, since a drive mechanism obstructs an operation | work, it removes before inclining a molten metal container. Then, the surface pressure is released in a posture in which the plate stands vertically, and the opening / closing metal frame is opened. At this time, the sliding metal frame held by the opening / closing metal frame is also opened. For this reason, one end of the intermediate rod comes off from the sliding metal frame and falls downward due to its own weight (position shift). As a result, when closing the opening and closing metal frame, it is necessary to adjust the position of the intermediate rod in accordance with the sliding metal frame, and there is a problem that it takes time to position and mount the intermediate rod. In particular, the replacement of the plate is performed at a high temperature after using the SN device, so that the above-described operation is a hot operation, and the burden on the operator is large.

WO 02/090017 pamphlet

  The problem to be solved by the present invention is to prevent the intermediate rod from falling off when replacing the plate in the SN device using the intermediate rod so as to be detachable from the drive mechanism.

  The present invention includes a fixed metal frame fixed to the bottom of the molten metal container, an open / close metal frame connected to the fixed metal frame so as to be openable and closable, and a sliding metal frame slidably disposed on the open / close metal frame, A sliding nozzle device including an intermediate rod, wherein one end of the intermediate rod is detachably attached to the sliding metal frame, and the other end of the intermediate rod is detachably attached to a drive mechanism for sliding the sliding metal frame The intermediate rod is provided with an engaging portion that can be engaged with an intermediate rod support that supports the intermediate rod.

  In the present invention, the engaging portion of the intermediate rod is preferably provided so as to be movable in the axial direction of the intermediate rod.

  In the present invention, when the plate is replaced, the intermediate rod can be prevented from falling off by engaging the intermediate rod support with the engaging portion of the intermediate rod.

  Also, if the intermediate rod can be moved in the axial direction, the intermediate rod support can be moved to the position of the intermediate rod support so that the vertical position does not shift when the intermediate rod is supported by the intermediate rod support. In addition, the engaging portion can be moved. Therefore, after the plate is replaced, when the opening and closing metal frame and the sliding metal frame are closed, it can be reattached to the sliding metal frame without adjusting the position of the intermediate rod, and work efficiency and burden reduction can be achieved. .

The whole structure of SN device of the present invention is shown, (a) is a sectional view and (b) is a bottom view. It is a disassembled perspective view which shows the structure of the intermediate | middle rod used with SN apparatus of FIG. The state in the vicinity of the intermediate rod at the time of exchanging the plate is shown, (a) shows the state before mounting the intermediate rod support, and (b) shows the state where the intermediate rod support is mounted. The other Example of this invention is shown, (a) shows the state before mounting | wearing with an intermediate rod support, (b) shows the state which mounted | wore with the intermediate rod support.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  FIG. 1 shows the overall configuration of the SN device of the present invention, where (a) is a cross-sectional view and (b) is a bottom view. The SN device shown in the figure is used to control the flow rate of molten steel discharged from the ladle, and is connected to the fixed metal frame 2 fixed to the bottom of the ladle 1 and the fixed metal frame 2 so as to be opened and closed. The opening / closing metal frame 3 and the sliding metal frame 4 slidably disposed on the opening / closing metal frame 3 are provided. An upper plate 5 is disposed on the fixed metal frame 2, and a sliding plate 6 is disposed on the sliding metal frame 4. An upper nozzle 7 is connected to the upper plate 5, a long nozzle 9 is connected to the lower plate 6 via a lower nozzle 8, and the upper nozzle 7 is fitted in the tuyere tuyere 1a.

  A hydraulic cylinder 11 (drive mechanism) is detachably connected to the sliding metal frame 4 via an intermediate rod 10. That is, the first mounting portion 10a at one end of the intermediate rod 10 is detachably mounted on the sliding metal frame 4, and the second mounting portion 10b at the other end is detachably mounted on the rod of the hydraulic cylinder 11. . The intermediate rod 10 is slidably supported by a support frame 12 fixed to the bottom of the ladle 1. Further, the intermediate rod 10 is provided with an engaging portion 10c that can be engaged with an intermediate rod support described later.

  A detailed configuration of the intermediate rod 10 will be described with reference to an exploded perspective view of FIG. A male screw portion 10d is provided on one end side of the intermediate rod, and the engaging portion 10c is screwed into the male screw portion 10d. Accordingly, the engaging portion 10 c is provided on the intermediate rod 10 so as to be movable in the axial direction of the intermediate rod 10. The first mounting portion 10a is screwed into the male screw portion 10d and then fixed with a set bolt 10e. The first mounting portion 10a is detachably mounted in a mounting hole 4a provided at one end of the sliding plate 4. On the other hand, the second mounting portion 10 b at the other end of the intermediate rod 10 is detachably mounted on a joint 11 a fixed to the rod tip of the hydraulic cylinder 11.

  FIG. 2 also shows an intermediate rod support 13 that engages with the engaging portion 10c of the intermediate rod 10 to support the intermediate rod 10 when replacing a plate, which will be described later.

  In the above configuration, the flow rate of the molten steel is controlled by sliding the sliding metal frame 4 (lower plate 6) in a state where a surface pressure is applied between the plates in use. The sliding metal frame 4 is slid by driving a hydraulic cylinder 11 connected through an intermediate rod 10.

  When the plate is exchanged after use, the hydraulic cylinder 11 is removed from the second mounting portion 10 of the intermediate rod 10, and the plate brick is turned upright by turning 90 ° from the used posture.

  The state in the vicinity of the intermediate rod at this time is shown enlarged in FIG. When replacing the plate, the surface pressure is released in this state, and the opening and closing metal frame is opened. Thereby, the sliding metal frame 4 is also opened together with the opening / closing metal frame. Then, the first mounting portion 10a of the intermediate rod 10 is detached from the sliding metal frame 4.

  If this is the case, the intermediate rod 10 will drop downward, so in the present invention, the locking portion 13a of the intermediate rod support 13 is engaged with the engaging portion 10c of the intermediate rod 10 before the opening / closing metal frame is opened. Thus, the intermediate rod support 13 is mounted and placed on the support frame 12 (see FIG. 3B). At this time, the vertical position of the engaging portion 10c is adjusted in advance so that the vertical position of the intermediate rod 10 does not change before and after the intermediate rod support 13 is mounted.

  In this way, by engaging and supporting the intermediate rod support 13 with the engaging portion 10c of the intermediate rod 10, it is possible to prevent the intermediate rod 10 from dropping downward when the opening / closing metal frame is opened. Further, since the intermediate rod 10 is maintained in the vertical position by the intermediate rod support 13, the first mounting portion 10a of the intermediate rod 10 slides if the opening and closing metal frame and the sliding metal frame are closed after replacing the plate. Reattached to the metal frame 4. Thereafter, when the intermediate rod support 13 is removed, the original state is restored.

  FIG. 4 shows another embodiment of the present invention. In the previous embodiment, the second mounting portion 10b of the intermediate rod 10 is positioned downward when the plate is changed by 90 °, but in the present embodiment, it is positioned upward.

  In this embodiment, the support portion 12a is provided on the lower surface of the support frame 12, and the base portion 13b of the intermediate rod support 13 is mounted so that the intermediate rod support 13 can be suspended and supported. And before opening an opening-and-closing metal frame, while attaching the base 13b of the intermediate rod support tool 13 to the support part 12a, the latching | locking part 13a of the intermediate rod support tool 13 is engaged with the engaging part 10c of the intermediate rod 10. Thus, it is possible to prevent the intermediate rod 10 from falling off as in the previous embodiment. Also in this embodiment, the vertical position of the engaging portion 10c is adjusted in advance so that the vertical position of the intermediate rod 10 does not change before and after the intermediate rod support 13 is mounted.

1 Ladle (molten metal container)
DESCRIPTION OF SYMBOLS 1a Tuyere 2 Fixed metal frame 3 Opening / closing metal frame 4 Sliding metal frame 4a Mounting hole 5 Upper plate 6 Sliding plate 7 Upper nozzle 8 Lower nozzle 9 Long nozzle 10 Intermediate rod 10a First mounting part 10b Second mounting part 10c Joint part 10d Male thread part 10e Set bolt 11 Hydraulic cylinder 11a Joint 12 Support frame 12a Support part 13 Intermediate rod support tool 13a Locking part 13b Base part

Claims (2)

A fixed metal frame fixed to the bottom of the molten metal container, an open / close metal frame connected to the fixed metal frame so as to be opened and closed, a sliding metal frame slidably disposed on the open / close metal frame, and an intermediate rod. A sliding nozzle device in which one end of the intermediate rod is detachably attached to the sliding metal frame, and the other end of the intermediate rod is detachably attached to a drive mechanism for sliding the sliding metal frame.
A sliding nozzle device, wherein the intermediate rod is provided with an engaging portion that can be engaged with an intermediate rod support that supports the intermediate rod.   The sliding nozzle device according to claim 1, wherein the engaging portion of the intermediate rod is provided so as to be movable in the axial direction of the intermediate rod.

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