JP2009202207A - Sliding nozzle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding nozzle device where, upon the exchange of a plate brick, when an operation for releasing facial pressure and a facial pressure applying operation after the exchange are performed, the phenomenon that the operations are complicated by the presence of heat preventive covers is reduced. <P>SOLUTION: In the sliding nozzle device which performs the application and release of facial pressure utilizing driving force for sliding a plate brick, and has a facial pressure operating member therefor, heat preventive covers 16, and 26 are provided at an opening/closing metal flask or a sliding metal flask or both of the opening/closing metal flask and sliding metal flask, and the heat preventive covers 22, 26 are provided with small windows 17, 43 for performing the operation of the facial pressure operating member, so as to be openable/closable. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sliding nozzle device provided in a molten metal container, and more particularly to a sliding nozzle device that applies and releases a surface pressure using a driving force for sliding a plate brick.

  The sliding nozzle device provided in various molten metal containers can open and close a flow path for cutting out molten steel in the molten metal container as necessary, thereby enabling accurate flow control of the molten metal. Yes.

  As this sliding nozzle device, there are a two-plate type in which an upper fixed plate and a lower sliding plate are combined, and a three-plate type in which two upper and lower fixed plates are provided and a sliding plate is disposed between them. In order to prevent molten steel from entering between these plate bricks, it is common to provide a mechanism that applies a surface pressure to the sliding surface of the plate bricks so as not to hinder the operation. .

  As a means for applying this surface pressure, a coil spring is usually used, and a bolt tightening system is adopted as a surface pressure load and release mechanism. However, this bolt tightening method usually requires a worker to tighten the bolt with a tool while hot, and there is a problem that the bolt is easy to seize in addition to heavy work.

  In view of this, a mechanism has been studied in which the load and release of the surface pressure are performed using a driving force for sliding the plate brick.

  For example, the applicant of the present application disclosed in Patent Document 1 a sliding nozzle device that applies and releases a surface pressure between a sliding plate and a fixed plate by selectively moving an opening / closing metal frame.

  In Patent Document 2, a pair of surface pressure load mechanisms provided on both sides of a plate brick and the plate drive means are connected by a link member so that the surface pressure load is applied using the drive force of the plate drive means. In addition, there is disclosed a surface pressure load device for a slide valve in which the surface pressure is released even when the connection release is forgotten after the surface pressure load so that the molten metal does not leak.

  However, the sliding nozzle device is usually provided with a metal heat insulating cover so as to cover the entire lower surface of the sliding nozzle device in order to prevent high heat and splash received from the molten steel. According to the techniques of Patent Documents 1 and 2 described above, the load and release of the surface pressure can be automated to some extent, but still require manual work by the operator. For example, in Patent Document 1, it is necessary to manually attach and detach the surface pressure operating member, and in Patent Document 2, it is necessary to manually connect the link member as the surface pressure operating member and the fret drive means. Therefore, the presence of the heat insulating cover hinders the work by the worker's manual operation when the surface pressure is applied and released.

  Therefore, as disclosed in Patent Document 3, there is a case where the heat insulating cover itself can be opened and closed.

  However, in the sliding nozzle device, when replacing the plate brick, it is usual to open the opening and closing metal frame of the sliding nozzle device and replace the plate brick. For this reason, when the heat insulating cover is provided in an openable / closable manner regardless of the type, the opening / closing operation of the heat insulating cover is added to the opening / closing operation of the opening / closing metal frame, thereby increasing the burden on the operator.

In addition, since the heat insulating cover is used at a high temperature, distortion occurs, and the opening / closing operation does not go smoothly, and troubles are likely to occur. For this reason, a special structure for preventing distortion is required, resulting in high costs and complicated handling.
Japanese Patent Laid-Open No. 11-179531 JP 2005-262289 A JP 2007-326120 A

  The problem to be solved by the present invention is that when replacing a plate brick, the operation for releasing the surface pressure and the surface pressure load operation after replacing the plate brick are complicated due to the presence of the heat insulating cover. It is to reduce.

  The present invention relates to a sliding nozzle device having a surface pressure operating member for applying and releasing a surface pressure by using a driving force for sliding a plate brick. It is provided in both the metal frame or both the opening and closing metal frame and the sliding metal frame, and a small window for performing the operation of the surface pressure operating member is provided in the heat insulating cover so as to be openable and closable.

  By providing a small window in the heat insulation cover that can be opened and closed, the surface pressure operation member can be operated through this small window, so there is no need to move the heat insulation cover and double handling of heavy objects is not required. The burden on the person is greatly reduced.

  In addition, since the heat insulating cover is attached to the opening / closing metal frame or the sliding metal frame, or both the opening / closing metal frame and the sliding metal frame, it does not cause trouble even if it receives distortion due to heat.

  Hereinafter, embodiments of the present invention will be described by way of examples.

  FIG. 1 shows a sliding nozzle device according to an embodiment of the present invention as viewed from below, and FIG. 2 shows its components. 3 shows a state in which the heat insulating cover is removed in FIG. 1, and FIG. 4 shows a cross section taken along the line AA in FIG.

  First, a mechanism for loading and releasing the surface pressure will be described with reference to FIGS. 3 and 4.

  A sliding metal frame 3 is assembled between the fixed metal frame 1 and the open / close metal frame 2 in the same direction as the moving direction of the open / close metal frame 2, and a bracket 1 b and a bracket 1 c are provided at predetermined positions of the fixed metal frame 1. The hinge shaft 1a is laterally provided between them.

  The opening / closing metal frame 2 is provided with brackets 2a that are extrapolated to the hinge shafts 1a. The opening / closing metal frame 2 is ST2 in the A or B direction with respect to the fixed metal frame 1 by the hinge shafts 1a and the brackets 2a. It is connected so that it can move with the stroke of. When the opening / closing metal frame 2 moves in the A direction and reaches the position of the forward limit V of the stroke, the surface pressure is released, and when it moves in the B direction and reaches the position of the backward limit W of the stroke, the surface pressure is loaded. Is set to

  On the other hand, as shown in FIG. 4, a fixed plate 5 is fixedly held on the fixed metal frame 1, and a slide plate 6 whose upper surface is a sliding surface with respect to the fixed plate 5 is the same on the slide metal frame 3. Is held fixed.

  The sliding metal frame 3 includes a sleeve 3a that passes through an oval opening 2b perforated in the opening / closing metal frame 2 and protrudes below the lower surface of the opening / closing metal frame 2, and the sleeve 3a includes a holder 11. The lower nozzle 10 is attached via As shown in FIG. 3, the sliding metal frame 3 is connected to an advanceable / retractable rod 4a connected to a drive source (not shown). Alternatively, it is movable in the B direction. However, the moving range of the sliding metal frame 3 is limited to the stroke represented by ST1 from the position of the forward limit X on the A direction side to the position of the backward limit Y on the B direction side. Note that, at the position of the backward limit Y, the opening of the lower nozzle 10 matches the fixed plate opening 5 a provided in the fixed plate 5.

  FIG. 5 is a perspective view showing a schematic structure of a surface pressure block which is a surface pressure operating member.

  Fig.5 (a) shows the state before rotation of a surface pressure block. As shown in the figure, end portions 9a of a pair of surface pressure blocks 9 are pivotally mounted in the vicinity of a bracket 2a located on the bottom surface side of the opening / closing metal frame 2 and on the rod 4a side, and the pair of surface pressure blocks 9 can be rotated around the end 9a. Then, as shown in FIG. 5 (b), these surface pressure blocks 9 are rotated as necessary, and each of them is hung on the hinge shaft 1 a of the fixed metal frame 1. Thereby, even if the opening and closing metal frame 2 tries to move in the direction A in FIG. 3, the movement of the opening and closing metal frame 2 is prevented by the bracket 2 a engaging with the surface pressure block 9. During the casting operation, the contact pressure block 9 is always hung on the hinge shaft 1a so that the opening / closing metal frame 2 does not move.

  Returning to FIG. 3, a surface pressure load member 12, which is a surface pressure operating member, is attached to and detached from the outer peripheral surface of the sleeve 3 a located at the opening 2 b of the opening / closing metal frame 2 and the end of the inner surface of the opening 2 b on the B direction side. It is freely attached to the opening / closing metal frame 2. As will be described later, the opening / closing metal frame 2 can be retracted through the surface pressure load member 12 in conjunction with the retraction of the sliding metal frame 3.

  The surface pressure load member 12 is applied when a surface pressure load is applied or released in order to prevent the position of the retracting limit W of the opening / closing metal frame 2 from being affected by the change in the position of the retracting limit Y of the sliding metal frame 3. Wear only when you do.

  The operation of loading or releasing the surface pressure is as disclosed in detail in the above-mentioned Patent Document 1, and an outline thereof will be described with reference to FIG.

  First, immediately after exchanging the fixed plate 5 and the sliding plate and closing the opening / closing metal frame, the surface pressure load member 12 and the auxiliary block 13 are attached to the opening 2b as shown in FIG. The block 9 is removed. Then, by moving the sliding metal frame 3 in the A direction, the opening / closing metal frame 2 is moved in the A direction via the sleeve 3a, and is positioned at the forward limit V (see FIG. 3).

  In this state, when the sliding metal frame 3 is moved in the direction B by driving the rod 4a, the sleeve 3a of the sliding metal frame 3 presses the surface 15 via the surface pressure load member 12, so that the opening / closing metal frame 2 is Move in direction B. When the bracket 2a of the opening / closing metal frame 2 comes into contact with the bracket 1b on the rod 4a side of the fixed metal frame 1, the movement is stopped, and the state shown in FIG. The position (see FIG. 3) is reached. At this time, similarly to the method disclosed in Japanese Patent Laid-Open No. 9-122899, the surface pressure is applied because the toggle pin of the fixed metal frame 1 presses the spring provided in the spring chamber of the open / close metal frame 2. .

  After the surface pressure is applied, the surface pressure block 9 is rotated and mounted between the brackets 1b and 1c to prevent the opening / closing metal frame 2 from moving and prevent the surface pressure from being released. . Then, after the surface pressure block 9 is mounted, the sliding metal frame 3 is slightly moved in the A direction to remove the surface pressure load member 12 and also remove the auxiliary block 13 from the opening 2b.

  On the other hand, when releasing the surface pressure, the sliding metal frame 3 is stopped in a state slightly moved in the direction B from the state shown in FIG. 6C, and the surface pressure load member 12 and the auxiliary block 13 are connected to each other in FIG. As shown to b), it arrange | positions in the predetermined location of the opening part 2b. Thereafter, the sliding metal frame 3 is moved in the B direction to bring the sleeve 3a into contact with the surface pressure load member 12, and the bracket 2a of the opening / closing metal frame 2 is pressed against the bracket lb on the rod 4a side of the fixed metal frame 1 In this state, the surface pressure block 9 is rotated and removed from between the brackets 1b and 2a.

  After removing the surface pressure block 9, the sliding metal frame 3 is moved in the A direction. Then, the sleeve 3a presses the auxiliary block 13 positioned on the side opposite to the surface pressure block 9 to move the opening / closing metal frame 2 to the A side. Thereby, the pressing of the spring mounted on the opening / closing metal frame 2 is released, the surface pressure is released, and the state returns to the state of FIG.

  Next, referring to FIG. 1 and FIG. 2, the heat insulating cover according to the present invention comprises two members, a lower heat insulating cover 16 attached to the opening / closing metal frame and an upper heat insulating cover 26 attached to the sliding metal frame. These are arranged so as to be spaced from each other so that the upper heat-insulating cover 26 does not interfere with contact even if it moves within the stroke of the sliding metal frame.

  As shown in FIG. 2, the lower heat insulating cover 16 has a substantially rectangular plate shape, and is fixed to the opening / closing metal frame 2 with four bolts. At the end of the lower heat insulating cover 16 on the long side, two rectangular open / closed small windows 17 are provided at symmetrical positions with respect to the central axis in the longitudinal direction.

  The openable small window 17 includes a rectangular cutout portion 20 provided at the end of the lower heat insulating cover 16 on the long side, and a lower door 18 provided rotatably on the lower heat insulating cover 16.

  The notch 20 is formed in a shape in which a part of the end face of the lower heat insulating cover 16 is cut off, that is, a rectangle having no frame on the outside. By forming the rectangular cutout 20 having no frame on the outside in this way, it becomes easy to attach and detach the contact pressure block 9 (see FIGS. 5 and 6) which is the contact pressure operating member described above. Yes. The rectangular cutout portion 20 is provided at a position facing the surface pressure block 9, and the size of the rectangular notch portion 20 is sufficient to ensure a space that allows the operation for removing the surface pressure block 9 from the hinge shaft 1a.

  The area of the lower door 18 is larger than the area of the notch 20 and is provided so as to be rotatable by a hinge 19. And in order to close the lower side door 18, the pinning mechanism is employ | adopted.

  A pin 21 for pinning is attached to the lower heat insulating cover 16 by a chain 24. The pin 21 is inserted into the hole of the pin holder 22 to prevent the lower door 18 from being opened. The pin 21 is preferably an elongated pin-shaped object such as a pine needle pin, a split pin, or a wire that is hard to come off and is easy to attach and detach and has heat resistance.

  The lower door 18 is provided so as to open downward when replacing plate bricks. That is, the sliding nozzle device of FIG. 2 is attached to the molten metal container so that the hinge 19 of the lower door 18 is positioned on the lower side when the plate brick is replaced.

  A plate-like pressing member 25 is attached to the inside of the lower door 18 so as to be in contact with the surface pressure block 9. The pressing member 25 comes into contact with the surface pressure block 9 when the lower door 18 is closed, or has a height at which the gap is 2 mm or less. By providing the pressing member 25, it is possible to prevent the surface pressure block 9 from coming off from between the brackets during use.

  The length of the central notch 23 of the lower heat insulating cover 16 in the longitudinal axis direction is to operate the plate brick stroke and the surface pressure operation member (the surface pressure load member 12 and the auxiliary block 13 shown in FIG. 6). The space can be secured. Specifically, it is equal to or longer than the total length of the outer diameter of the lower nozzle sleeve 3a and the stroke length for sliding the plate brick. When the length is smaller than this length, a part of the lower heat-insulating cover 16 comes into contact with and interferes with the operation of attaching and detaching the surface pressure operating member through the openable small window 27.

  The central notch 31 of the upper heat insulating cover 26 includes a space in which the lower nozzle sleeve 3a is inserted, and a space in which the surface pressure load member 12 and the auxiliary block 13 (see FIG. 6) can be taken in and out. That is, it has a shape in which a central circular portion and two rectangular portions on both sides are combined. The length of the central notch 31 in the longitudinal axis direction is the outer diameter of the lower nozzle sleeve 3a and the plate sliding direction length at the position where the surface pressure load member 12 and the auxiliary block 13 are inserted. More than the added length is required. If the length is smaller than this length, the work of attaching and detaching the surface pressure operation member (surface pressure load member 12 and auxiliary block 13) will be hindered.

  A space in which the surface pressure load member 12 and the auxiliary block 13 can be put in and out in the central cutout portion 31 of the upper heat insulating cover 26, that is, two rectangular portions, are provided with upper doors 28, respectively. It has become. In the openable small window 27, an upper door 28 is attached by a bracket 29 and a hinge shaft 30 so that the rotation axis is parallel to the sliding direction of the plate brick. The pinning mechanism for preventing the upper door 28 from opening is the same as that of the lower heat insulating cover.

  The upper heat insulating cover 26 is fixed with a bolt to a mounting plate 32 provided on the side surface of the lower nozzle sleeve 3a attached to the sliding metal frame.

  At the time of loading and releasing the surface pressure, as described with reference to FIG. 6, the surface pressure block 9, the surface pressure load member 12, and the auxiliary block 13 that are surface pressure operation members are attached and detached. The operation member is operated through the openable / closable small window 17 of the lower heat insulating cover 16 and the openable / removable small window 27 of the upper heat insulating cover. Specifically, when the surface pressure block 9 is attached and detached, the lower door 18 of the openable small window 17 of the lower heat insulating cover 16 is opened, and when the surface pressure load member 12 and the auxiliary block 13 are attached and detached. The upper door 28 of the openable small window 27 of the upper heat insulating cover is opened, and when the operation is finished, each door is closed.

The figure which looked at the sliding nozzle apparatus which concerns on the Example of this invention from the bottom is shown. Fig. 2 shows components of the sliding nozzle device of Fig. 1. The state which removed the heat insulation cover in the sliding nozzle apparatus of FIG. 1 is shown. The AA cross section of FIG. 3 is shown. It is a perspective view which shows schematic structure of the surface pressure block which is a surface pressure operation member. The procedure for loading and releasing the surface pressure is shown below.

Explanation of symbols

1: Fixed metal frame 1a: Hinge shaft 1b: Bracket 1c: Bracket 2: Opening / closing metal frame 2a: Bracket 2b: Opening 3: Sliding metal frame 3a: Sleeve 4a: Rod 5: Fixed plate 6: Sliding plate 7: Spring chamber 8: Hanger 9: Surface pressure block 10: Lower nozzle 11: Holder 12: Surface pressure load member 13: Auxiliary block 14: Surface in the direction of travel when surface pressure is applied to the sleeve 15: Inner surface of opening of opening / closing metal frame 16: Lower heat insulating cover 17: Opening / closing type small window 18: Lower door 19: Hinge 20: Notch portion 21: Pin 22: Pin holder 23: Center notch portion 24: Chain 25: Holding member 26: Upper heat insulating member Cover 27: Opening and closing type small window 28: Upper side door 29: Bracket 30: Hinge shaft 31: Notch in the central part 32: Mounting plate

Claims (2)

In a sliding nozzle device having a surface pressure operating member for loading and releasing the surface pressure using a driving force for sliding the plate brick,
A heat insulating cover is provided on the opening / closing metal frame or sliding metal frame, or both the opening / closing metal frame and sliding metal frame,
A sliding nozzle device in which a small window for operating the surface pressure operating member is provided on the heat insulating cover so as to be openable and closable.   The sliding nozzle device according to claim 1, wherein the door of the small window is rotatably attached to the heat insulating cover, and a pressing member that contacts the surface pressure operating member is provided inside the door.

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