WO2010095638A1

WO2010095638A1 - Sliding nozzle apparatus

Info

Publication number: WO2010095638A1
Application number: PCT/JP2010/052324
Authority: WO
Inventors: 賢一原田; 伸次郎斉藤; 義隆石井; 彰能登原
Original assignee: 黒崎播磨株式会社
Priority date: 2009-02-19
Filing date: 2010-02-17
Publication date: 2010-08-26
Also published as: JP2010188398A; CN102317009A

Abstract

Provided is a sliding nozzle apparatus in which a failure to lock or unlock a stop which is adapted to prevent the release of a surface pressure does not occur. A surface pressure loading means comprises a pair of spring cases (30) attached to opposite sides of a stationary metal frame (18), a pair of guide cases (22) which are formed on opposite sides of an opening and closing metal frame (16) and which are located below the respective spring cases (30), and a transmission member (13) which transmits the spring force of compression springs (31) received in the spring cases (30) to a sliding metal frame (17). The transmission member (13) is comprised of a pair of loading bars (12) which hold therebetween the spring cases (30) and the guide cases (22), and a lateral member which extends between rear ends (12c) of the loading bars (12). A heat insulation cover (14) rotates within a vertical plane including a movement direction of the transmission member (13) and is provided with an engagement portion (15) in the form of a block, at a rotating front end of the heat insulation cover. The engagement portion (15) prevents the surface pressure from being released due to the backward movement of the transmission member (13) when the heat insulation cover (14) is closed.

Description

Sliding nozzle device

The present invention relates to a sliding nozzle device that controls the outflow amount of molten metal in a molten metal container, and more particularly, to a sliding nozzle device that includes a surface pressure loading means that loads a surface pressure between a fixed plate and a sliding plate. .

The sliding nozzle device includes a fixed plate and a sliding plate, a holding unit that holds each plate, a sliding unit that slides the sliding plate, and a surface that applies a surface pressure between the fixed plate and the sliding plate. Pressure loading means.

As the surface pressure loading means, a method of pressing the sliding plate against the fixed plate using the elastic force of the compression spring is generally used. For example, in the case of the conventional sliding nozzle device shown in FIG. 9, a loading case 50 is used to sandwich a spring case 52 in which a compression spring 51 is housed and a guide case 53 connected to an opening / closing metal frame (not shown). The surface pressure is loaded. The loading bar 50 is J-shaped when viewed from the side, and a notch having an inclined portion is formed on the lower side of the tip of the rod-

like portions

50a and 50b. When the loading bar 50 is pushed in using the roller 54, the spring case 52 is pushed down, the opening / closing metal frame is pushed up by the elastic force of the compression spring 51 in the spring case 52, and slides on the fixing plate (not shown). This is a mechanism in which a surface pressure is applied between the moving plate (not shown).

In the above surface pressure loading means, a stopper 55 is provided so that the surface pressure is not accidentally released during operation. The stopper 55 is rotatable about the advancing / retreating direction of the loading bar 50. After the loading bar 50 is pushed in, the stopper 55 is rotated, and the stopper 55 is disposed immediately after the rear end portion 50c of the loading bar 50 to prevent the loading bar 50 from coming off.

Also, Patent Document 1 discloses a mechanism in which the load and release of the surface pressure are interlocked with the slide metal frame. In Patent Document 1, a substantially U-shaped cross section including a projecting edge projecting from a side portion of a base frame (fixed metal frame) fixed to the bottom of a molten metal container and a lower side surface of a slide case (slide metal frame). A slide case is provided with a rail-like surface pressure load member, a compression spring interposed between the upper side of the surface pressure load member and the upper surface of the base frame, and a rail laid on the upper surface of the lower side of the surface pressure load member. It is set as the structure which supports the roller attached to the both sides of this. The end of the rail is an inclined portion, and the surface pressure is released by moving the roller to the inclined portion. A stopper is provided between the base frame and the rod connecting portion of the slide case so that the slide case does not move to the inclined portion by mistake during operation.

JP 2006-136912 A

However, in the conventional sliding nozzle device, forgetting to apply the stopper may cause the surface pressure to be released accidentally, or conversely forgetting to remove the stopper, and pulling the loading bar with the stopper set may damage the stopper. Trouble is sporadic.

On the other hand, in the case of the sliding nozzle device described in Patent Document 1, since the inclined portion of the rail cannot be used when the surface pressure is applied, there is a problem that the full stroke cannot be used when controlling the flow rate of the molten steel. Since the plate slides by rotating in a state where the roller is subjected to surface pressure, there is a problem that the load applied to the roller is large. In addition, in this sliding nozzle device, as in the conventional sliding nozzle device, the possibility of forgetting to put on and removing the stopper cannot be excluded.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sliding nozzle device that does not cause forgetting to put on or remove a stopper that prevents release of surface pressure.

In order to achieve the above object, the present invention is installed at the bottom of a molten metal container, and stores a fixed metal frame that holds a fixed plate, a slide metal frame that slides while holding a sliding plate, and a compression spring. A spring case connected to the fixed metal frame, and a transmission member that transmits the elastic force of the compression spring to the slide metal frame, and a load of surface pressure between the fixed plate and the slide plate; In the sliding nozzle device in which the release is performed by the movement of the transmission member, the thermal insulation cover that is rotatably installed on the fixed metal frame is engaged with the transmission member with the thermal insulation cover closed, and the surface pressure It is characterized in that a locking portion is provided for restraining the movement of the transmission member in the direction in which is released. Here, the “direction in which the surface pressure is released” is a direction in which the transmission member moves in order to release the surface pressure. In addition, the following “direction in which the surface pressure is applied” refers to a direction in which the transmission member moves in order to apply the surface pressure.

¡The heat-resistant cover that is provided on the fixed metal frame so as to be freely rotatable takes up a large area in the sliding nozzle device, so you can never forget to close it. Therefore, in the present invention, the heat insulating cover is provided with a locking portion (stopper) that engages with the transmission member in a state where the heat insulating cover is closed and restricts the movement of the transmission member in the direction in which the surface pressure is released. In this way, after moving the transmission member in the direction in which the surface pressure is applied, closing the heat insulating cover prevents the forgetting to apply the stopper, while the surface pressure is released if the heat insulating cover is not opened. Since the transmission member cannot be moved, the stopper is not damaged due to forgetting to remove the stopper.

In the sliding nozzle device according to the present invention, it is preferable that the heat insulating cover can be closed only in a state where the transmission member is moved in a direction in which the surface pressure is applied. No more forgetting to work with pressure.

In the sliding nozzle device according to the present invention, it is preferable that the rotation shaft of the heat insulating cover is disposed in a direction orthogonal to the moving direction of the transmission member. When the rotation shaft of the heat insulating cover is arranged in a direction orthogonal to the moving direction of the transmission member, the force by the transmission member acting on the heat insulating cover acts as an in-plane compressive force when the heat insulating cover is closed. Therefore, a torsional moment does not act on the heat insulating cover, and a large load is not applied to the rotating shaft.

In the sliding nozzle device according to the present invention, the heat insulating cover is provided with a locking portion that engages with the transmission member with the heat insulating cover closed and restricts the movement of the transmission member in the direction in which the surface pressure is released. In addition to not forgetting to apply the stopper, the transmission member cannot be moved in the direction in which the surface pressure is released unless the heat insulating cover is opened, so that the forgetting to remove the stopper does not occur.

In the sliding nozzle device concerning one embodiment of the present invention, it is a bottom view showing the state where surface pressure was canceled. In the sliding nozzle device, it is a side view showing a state in which the surface pressure is released. It is a bottom view which shows the state which pushed in the transmission member in the sliding nozzle apparatus. It is a side view which shows the state which pushed in the transmission member in the sliding nozzle apparatus. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. It is a bottom view which shows the state which closed the heat insulation cover in the sliding nozzle apparatus. FIG. 7 is a cross-sectional view taken along the line BB in FIG. 6. FIG. 3 is a side view showing a state in which the heat insulating cover is closed in the sliding nozzle device. It is a schematic diagram for demonstrating the surface pressure load mechanism of the conventional sliding nozzle apparatus.

Subsequently, an embodiment of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. In the following description, for the sake of convenience, the side where the nozzle hole is provided is referred to as the “front” side of the sliding nozzle device, and the side where the heat insulating cover is installed is referred to as the “rear” side of the sliding nozzle device.

FIGS. 1 and 2 are views showing the sliding nozzle device 10 in a state where the surface pressure between the sliding plate 24 and the fixed plate 25 (see FIG. 7) is released, and the transmission member 13 is located on the rearmost side. ing. 3 to 8 are views showing a state in which the transmission member 13 is pushed forward and a surface pressure is applied between the sliding plate 24 and the fixed plate 25. FIG. FIG. 7 is a cross-sectional view taken along the line BB in FIG. 6 taken perpendicularly to the sliding direction along the centers of the

nozzle holes

24a and 25a. As shown in the figure, the sliding nozzle device 10 according to an embodiment of the present invention includes a fixed plate 25 and a sliding plate 24, holding means for holding the

plates

24 and 25, and a sliding plate 24. In addition to the sliding means to be moved and the surface pressure loading means for applying a surface pressure between the fixed plate 25 and the sliding plate 24, a heat insulating cover 14 is provided.

The

nozzle holes

25a and 24a are formed in the fixed plate 25 and the sliding plate 24, respectively. The fixed plate 25 is fixed to the bottom surface of the molten metal container 27 via a fixed metal frame 18 (holding means), and the upper nozzle 26 is connected to the nozzle hole 25a. On the other hand, the slide plate 24 is fixed on a slide metal frame 17 (holding means) disposed inside an open / close metal frame 16 provided to be openable / closable with respect to the fixed metal frame 18, and is attached to the lower surface of the fixed plate 25. Slide along. A lower nozzle 23 is connected to the nozzle hole 24 a of the sliding plate 24.

The fixed metal frame 18 extends in the sliding direction of the slide metal frame 17, and a hydraulic cylinder 28 (sliding means) is installed at the rear end of the extending direction (see FIG. 2). And the front-end | tip part of the rod 29 of the hydraulic cylinder 28 is connected to the rear-end part of the slide metal frame 17 via the sliding block 43 (refer FIG. 3).

A guide case 22 described later is formed on the side surface of the opening / closing metal frame 16. In addition, a pair of arms 21 extending rearward is formed at the rear end portion, and the front end portions of the arms 21 are connected to both side portions of the fixed metal frame 18 via the rotation shafts 20 respectively. Has been. As a result, the opening and closing metal frame 16 can be opened and closed with the pivot shaft 20 arranged in a direction orthogonal to the sliding direction of the slide metal frame 17 as a fulcrum.

The surface pressure load means includes a pair of spring cases 30 mounted on both sides of the fixed metal frame 18, a pair of guide cases 22 formed on both sides of the opening / closing metal frame 16 and positioned below each spring case 30, and a spring case. 30 is provided with a transmission member 13 for transmitting the elastic force of the compression spring 31 accommodated in 30 to the slide metal frame 17 (see FIGS. 2 and 7).

As shown in FIGS. 1 and 2, the transmission member 13 includes a pair of loading bars 12 extending in the sliding direction of the slide metal frame 17 and a horizontal member laid between the rear end portions 12 c of the loading bars 12. 11. The loading bar 12 has a J-shape when viewed from the side, is positioned on the lower side, is inserted into the guide case 22, is longer than the first rod-shaped portion 12 a longer than the guide case 22, and is positioned on the upper side. It has the 2nd rod-shaped part 12b shorter than the rod-shaped part 12a. In addition, inclined portions that are inclined upward toward the tip are formed on the lower sides of the tip portions of the first rod-like portion 12a and the second rod-like portion 12b of the loading bar 12, respectively.

A connecting jig 40 for connecting the rod 29 of the hydraulic cylinder 28 and the transmission member 13 is provided at an intermediate portion of the horizontal member 11. Specifically, when the horizontal member 11 is retracted, the convex fitting 41 provided at the tip of the rod 29 and the connecting jig 40 are connected by a detachable surface pressure releasing jig 42 (see FIG. 1). ). The surface pressure releasing jig 42 is provided with a pair of claw portions 42a facing each other at one end portion and a hole portion 42b into which the convex metal fitting 41 is fitted at the other end portion. On the other hand, concave portions 40a into which the claw portions 42a of the surface pressure releasing jig 42 are fitted are formed on both side surfaces of the connecting jig 40 (see FIG. 3). As shown in FIG. 5, the lower surface 43 a of the sliding block 43 that connects the rear end portion of the slide metal frame 17 and the tip end portion of the rod 29 of the hydraulic cylinder 28 is fixed to the fixed metal rather than the connecting jig 40. The frame 18 is located on the alligator. For this reason, when the slide metal frame 17 is slid, the sliding block 43 does not come into contact with the connecting jig 40, and the convex metal fitting 41 comes into contact with the connecting jig 40 to move the horizontal member 11 forward. The surface pressure is applied by pushing.

The spring case 30 is disposed on an overhanging portion 18 a that protrudes laterally from the fixed metal frame 18, and is connected to the overhanging portion 18 a via a connecting pin 32. A plurality of compression springs 31 that press the spring case 30 upward against the overhanging portion 18 a are arranged in the spring case 30 along the sliding direction of the slide metal frame 17. Further, a long engagement portion 30 a and a short engagement portion 30 b extending downward are provided at the front end portion and the rear end portion of the spring case 30. The long engagement portion 30a and the short engagement portion 30b are formed of a rectangular frame, and a roller 34 is attached to the lower end portion. The long engagement portion 30a provided at the front end of the spring case 30 has a tip of the first rod-like portion 12a, and the short engagement portion 30b provided at the rear end of the spring case 30 has a tip of the second rod-like portion 12b. Each part is inserted from behind.

A hollow portion 22a extending in the sliding direction of the slide metal frame 17 is formed in the guide case 22, and the first rod-shaped portion 12a of the loading bar 12 is inserted into the hollow portion 22a from the rear. Further, rollers 33 are attached to both ends of the hollow portion 22a, and when the loading bar 12 slides in the forward direction, the roller 33 contacts the overhanging portion 18a.

As shown in FIGS. 1 and 2, the sliding nozzle device 10 having the above configuration has the first rod-like portion 12 a and the first rod-like portion 12 of the loading bar 12 in a state where the transmission member 13 is pulled out rearward and the surface pressure is released. The tip portions of the two-rod-shaped portion 12b are not in contact with the long engagement portion 30a and the short engagement portion 30b of the spring case 30, and the spring case 30 and the guide case 22 are in an unconnected state.

When the loading bar 12 slides in the forward direction, the first rod-shaped portion 12a passes above the roller 34 installed on the long engagement portion 30a extending from the spring case 30 installed on the fixed metal frame 18, and the short The second rod-shaped part 12b passes above the roller 34 installed in the engaging part 30b. At this time, the roller 33 comes into contact with the overhanging portion 18a, and the position of the guide case 22 and thus the position of the opening / closing metal frame 16 is determined. As the roller 34 moves downward according to the inclined portion of the loading bar 12, the spring case 30 also moves downward, and the compression spring 31 is compressed (see FIGS. 3 and 4). As a result, the spring case 30 moves downward, and the opening / closing metal frame 16 is pushed upward by the elastic force generated in the compression spring 31 in the spring case 30. As a result, a surface pressure is applied between the fixed plate 25 and the sliding plate 24. In the present embodiment, the moving direction of the transmission member 13 and the sliding direction of the slide metal frame 17 are the same.

In the sliding nozzle device 10, in order to protect the rod 29 of the hydraulic cylinder 28 from the scattered molten metal, the heat insulating cover 14 is installed immediately below the rod 29. In the present embodiment, one side of the rectangular plate-shaped heat insulating cover 14 is fixed via a rotating shaft 19 arranged in a direction orthogonal to the moving direction of the transmission member 13 (the sliding direction of the slide metal frame 17). It is connected to the frame 18 (see FIG. 1). Thereby, the heat insulating cover 14 can be rotated in a vertical plane including the moving direction of the transmission member 13. Further, a block-shaped locking portion 15 is provided at the rotating tip end portion of the heat insulating cover 14. The locking portion 15 prevents the transmission member 13 from moving in the direction in which the transmission member 13 moves rearward, that is, the surface pressure is released, with the heat insulating cover 14 closed. As shown in FIG. 8, when the heat insulating cover 14 is closed in a state where the transmission member 13 is pushed forward, that is, a surface pressure is applied, the locking portion 15 of the heat insulating cover 14 is set immediately after the horizontal member 11. The

In addition, the pin holding part 35 holding the lock pin 36 which locks the heat-insulating cover 14 so that the closed heat-insulating cover 14 is not opened by its own weight is provided on both sides of the fixed metal frame 18 with the heat-insulating cover 14 in between ( (See FIG. 6).

Next, the surface pressure load and the release procedure in the sliding nozzle device 10 having the above-described configuration will be described.
First, a case where a surface pressure is applied will be described.
(1) The state shown in FIGS. 1 and 2 in which the surface pressure is released is defined as an initial state. However, it is assumed that the surface pressure releasing jig 42 is not attached.
(2) The rod 29 of the hydraulic cylinder 28 is extended (advanced), and the convex fitting 41 is brought into contact with the rear surface of the connecting jig 40. Further, by extending the rod 29, the transmission member 13 is pushed forward via the connecting jig 40 and a surface pressure is applied (see FIGS. 3 to 5).
(3) Close the heat insulating cover 14 and insert the lock pin 36 into the pin holding portion 35 (see FIGS. 6 to 8).
(4) The lower nozzle 23 is mounted on the slide metal frame 17 (see FIGS. 6 to 8).

Next, a case where the surface pressure is released will be described.
(1) Remove the lower nozzle 23 from the slide metal frame 17.
(2) The lock pin 36 is pulled out from the pin holding part 35 and the heat insulating cover 14 is opened.
(3) The surface pressure release jig 42 is attached to connect the connecting jig 40 and the convex metal fitting 41 (see FIG. 1). Then, by contracting (retreating) the rod 29 of the hydraulic cylinder 28, the transmission member 13 is pulled rearward to release the surface pressure.

Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above embodiment, the slide metal frame is held by the opening / closing metal frame, and the slide metal frame is pressed through the opening / closing metal frame provided with the guide case. A guide case may be provided on the slide metal frame.

10: sliding nozzle device, 11: horizontal member, 12: loading bar, 12a: first rod-shaped portion, 12b: second rod-shaped portion, 12c: rear end portion, 13: transmission member, 14: heat-insulating cover, 15: engagement Stop part, 16: Opening / closing metal frame, 17: Slide metal frame, 18: Fixed metal frame, 18a: Overhang part, 19, 20: Rotating shaft, 21: Arm, 22: Guide case, 22a: Hollow part, 23 : Lower nozzle, 24: Sliding plate, 24a: Nozzle hole, 25: Fixed plate, 25a: Nozzle hole, 26: Upper nozzle, 27: Molten metal container, 28: Hydraulic cylinder, 29: Rod, 30: Spring case, 30a : Long engagement portion, 30b: Short engagement portion, 31: Compression spring, 32: Connection pin, 33, 34: Roller, 35: Pin holding portion, 36: Lock pin, 40: Connection jig, 40a: Recessed portion , 41: convex metal fittings, 4 : Surface pressure release jig, 42a: Claw part, 42b: Hole part, 43: Sliding block, 43a: Lower surface, 50: Loading bar, 50a, 50b: Bar-shaped part, 50c: Rear end part, 51: Compression spring, 52: Spring case, 53: Guide case, 54: Roller, 55: Stopper

Claims

A fixed metal frame that is installed at the bottom of the molten metal container and holds the fixed plate; a slide metal frame that holds and slides the sliding plate; and a spring case that houses the compression spring and is connected to the fixed metal frame; A sliding member that transmits a resilient force of the compression spring to the slide metal frame, and the load and release of the surface pressure between the fixed plate and the sliding plate are performed by the movement of the transmitting member In the nozzle device,
The heat insulating cover that is rotatably installed on the fixed metal frame is engaged with the transmission member in a state where the heat insulating cover is closed, and the movement of the transmission member in a direction in which the surface pressure is released is restrained. A sliding nozzle device provided with a locking portion.
The sliding nozzle device according to claim 1, wherein the heat insulating cover can be closed only in a state where the transmission member is moved in a direction in which the surface pressure is applied.
3. The sliding nozzle device according to claim 1, wherein a rotating shaft of the heat insulating cover is arranged in a direction orthogonal to a moving direction of the transmission member.