The present invention relates to a slide valve device for automatic surface pressure application, and to a surface pressure application method therefor. In particular, the present invention relates to a novel improvement for simplifying work of surface pressure application in a slide valve device constructed of a fixed plate, a slide plate, and a seal plate.
In general, in continuous casting facilities, as means for controlling outflow of a molten metal from a molten metal vessel, a slide valve device for opening and closing an outflow port of the molten metal vessel is provided at a bottom portion of the molten metal vessel.
As the slide valve device, the applicant of the present invention has invented and developed a slide valve device constructed of a fixed plate, a slide plate, and a seal plate (Patent Literature 1).
Specifically, as illustrated in
Further, as illustrated in
As illustrated in
Patent Literature
[PTL 1] JP 2007-326120 A
The slide valve device disclosed in Patent Literature 1 (hereinafter, referred to as “device of Patent Literature 1”) is structured as described above, and hence the following problem is inherent therein.
That is, in the device of Patent Literature 1, when the surface pressure is applied and released, the slide case 4 and the seal case 21 need to be coupled to each other using a connecting pin serving as the coupling means 23. Therefore, the structure of the device becomes complicated and the work involved becomes cumbersome. Further, in order to rotate the stopper 52, a certain size of clearance is necessary, but due to this clearance, the seal case may move in a little gap during the casting.
The present invention provides a slide valve device for automatic surface pressure application, including: a fixed plate fixed inside a base frame that is mounted onto a bottom lower surface of a molten metal vessel; a slide case including a slide plate, the slide case being provided below the fixed plate so as to be slidable by an actuator; a seal case provided below the slide case, the seal case including a seal plate or including a seal plate and a shooting nozzle; and a movable member provided to each side portion of the seal case so as to be movable on a support surface situated at each side portion of the base frame, the slide case and the seal case being slidable by the actuator so that a surface pressure is appliable and releasable, in which the base frame includes: a positioning member for determining an arrangement location of the seal case; and a stopper for fixing the seal case at the arrangement location, and in which the slide case or a guide piece includes a pusher for sliding the seal case together with the slide case when sliding the slide case in a surface pressure application direction. Further, the positioning member and the stopper are arranged so as to sandwich the seal case with respect to a sliding direction of the slide case. Further, a contact portion of the positioning member with respect to the seal case forms a pressing portion having elasticity. Further, the present invention provides a surface pressure application method for a slide valve device for automatic surface pressure application, the slide valve device for automatic surface pressure application including: a fixed plate fixed inside a base frame that is mounted onto a bottom lower surface of a molten metal vessel; a slide case including a slide plate, the slide case being provided below the fixed plate so as to be slidable by an actuator; a seal case provided below the slide case, the seal case including a seal plate or including a seal plate and a shooting nozzle; and a movable member provided to each side portion of the seal case so as to be movable on a support surface situated at each side portion of the base frame, the slide case and the seal case being slidable by the actuator so that a surface pressure is appliable and releasable, the base frame of the slide valve device for automatic surface pressure application including: a positioning member for determining an arrangement location of the seal case; and a stopper for fixing the seal case at the arrangement location, the guide piece or a slide case of the slide valve device for automatic surface pressure application including a pusher provided for pushing or drawing the seal case, the surface pressure application method including: sliding the slide case in a surface pressure application direction to move the seal case to the arrangement location together with the slide case through the intermediation of the pusher; and fitting the stopper to the seal case that has been moved to the arrangement location to fix the seal case at the arrangement location.
The slide valve device for automatic surface pressure application and the surface pressure application method therefor according to the present invention are structured and configured as described above, and hence the following effects can be obtained.
That is, in the slide valve device for automatic surface pressure application, including: the fixed plate fixed inside the base frame that is mounted onto the bottom lower surface of the molten metal vessel; the slide case including the slide plate, the slide case being provided below the fixed plate so as to be slidable by the actuator; the seal case provided below the slide case, the seal case including the seal plate or including the seal plate and the shooting nozzle; and the movable member provided to the each side portion of the seal case so as to be movable on the support surface situated at the each side portion of the base frame, the slide case and the seal case being slidable by the actuator so that the surface pressure is appliable and releasable, the base frame includes: the positioning member for determining the arrangement location of the seal case; and the stopper for fixing the seal case at the arrangement location, and the slide case or a guide piece includes the pusher for sliding the seal case together with the slide case when sliding the slide case in the surface pressure application direction.
Further, the positioning member and the stopper are arranged so as to sandwich the seal case with respect to the sliding direction of the slide case. Further, the contact portion of the positioning member with respect to the seal case forms the pressing portion having elasticity. Further, in the surface pressure application method for the slide valve device for automatic surface pressure application, the slide valve device for automatic surface pressure application including: the fixed plate fixed inside the base frame that is mounted onto the bottom lower surface of the molten metal vessel; the slide case including the slide plate, the slide case being provided below the fixed plate so as to be slidable by the actuator; the seal case provided below the slide case, the seal case including the seal plate or including the seal plate and the shooting nozzle; and the movable member provided to the each side portion of the seal case so as to be movable on the support surface situated at the each side portion of the base frame, the slide case and the seal case being slidable by the actuator so that the surface pressure is appliable and releasable, the base frame of the slide valve device for automatic surface pressure application including: the positioning member for determining the arrangement location of the seal case; and the stopper for fixing the seal case at the arrangement location, the slide case or the guide piece of the slide valve device for automatic surface pressure application including the pusher provided for pushing or drawing the seal case, by sliding the slide case in the surface pressure application direction, the seal case can be moved to the arrangement location together with the slide case through the intermediation of the pusher, and by fitting the stopper to the seal case that has been moved to the arrangement location, the seal case can be fixed at the arrangement location. The seal case can be pushed by the pusher, and hence, unlike the conventional case, the work of applying and releasing the surface pressure can be performed without coupling the slide case and the seal case to each other by the coupling means. Further, the seal case is pushed by the pusher until the seal case reaches the positioning member, and hence the seal case can be moved to the arrangement location with high accuracy. Further, the positioning member is provided opposite to the stopper with respect to the sliding direction, and hence the seal case can be fixed at the arrangement location by the positioning member and the stopper so that the seal case is not moved during operation. Further, when the contact portion of the positioning member with respect to the seal case is the pressing portion having elasticity, due to deformation of the pressing portion as an elastic member, a clearance, that is, a backlash, which is necessary to move the stopper, can be ensured. In addition, due to an elastic force of the pressing portion as an elastic member, the seal case is pressed against the stopper, and as a result, it is possible to prevent the seal case from moving during operation due to the clearance.
It is an object of the present invention to provide a slide valve device for automatic surface pressure application that is constructed of a fixed plate, a slide plate, and a seal plate, and a surface pressure application method therefor, which are capable of simplifying work of applying and releasing a surface pressure by using a pusher and a positioning member instead of using a coupling pin as in the conventional case.
Embodiments
In the following, a slide valve device for automatic surface pressure application and a surface pressure application method therefor according to a preferred embodiment of the present invention are described with reference to the drawings.
Note that, the same or similar components as those in the conventional example are represented by the same reference symbols when being described.
Below the fixed plate 3, a slide case 4 including a slide plate 5 provided with a nozzle hole 5a is connected through the intermediation of a guide piece 4b to a hydraulic or electrical actuator 7. With the activation of the actuator 7, only the slide case 4 is independently slidable together with the slide plate 5 in a horizontal direction in
The slide case 4 can be turned downward in
On a lower surface of the slide case 4 or the guide piece 4b, a pusher 53 formed of a protruding member is provided. When the slide case 4 is slid in a surface pressure application direction by the actuator 7, the seal case 21 is slidable together with the slide case 4 by the pusher 53.
Further, at an end portion of the base frame 2 which is opposite to the actuator 7, a pair of positioning members 51 are provided so as to determine an arrangement location X of the seal case 21 described later.
Further, a stopper 52 is provided to the base frame 2 on the pusher 53 side. The stopper 52 is capable of fixing the seal case 21 at the arrangement location. Note that, the positioning members 51 and the stopper 52 sandwich the seal case 21 along a sliding direction of the slide case 4.
As illustrated in
The contact portion 51a is formed so as to protrude forward from an end portion of the cylindrical member 51A, and is made of such a material that the contact portion 51a is deformed and pressed when a tip end 21A of the seal case 21 abuts against the contact portion 51a, and then the seal case 21 is slightly moved (biased) back in a direction of the original position of the seal case 21.
Note that, the positioning member 51 is not limited to the structure using the cylindrical member 51A, the compression spring 51C, and the like described above. For example, although illustration is omitted herein, the positioning member 51 may have a structure using only an integrally molded member having a rod shape or a T-shape in cross section, which is made of a rubber or resin material, or using only a spring. With this structure, actions and effects similar to those described above can be obtained.
Further, as illustrated in
Next, description is given of a case of operations of applying and releasing the surface pressure, which are performed by the slide valve device 20 according to the present invention structured as described above.
First, in a fully opened state (not shown) of the slide valve device 20 of the present invention, when a molten steel or a molten metal flows through the insertion nozzle 8, only the slide case 4 is slid by means of the actuator 7, whereby it is possible to perform control and an OFF operation of the molten metal which flows from the insertion nozzle 8 into the shooting nozzle 21a through the nozzle holes 3a and 5a.
In the above-mentioned case, the positioning members 51 for determining the arrangement location X of the seal case 21, and the stopper 52 for fixing the seal case 21 at the arrangement location X are provided to the base frame 2, while the pusher 53 for pushing the seal case 21 is provided to the slide case 4 or the guide piece 4b. Therefore, when the slide case 4 or the guide piece 4b is slid in the surface pressure application direction by the actuator 7, as illustrated in
The above-mentioned seal case 21 situated at the arrangement location X, which is illustrated in
Note that, regarding the movement of the seal case 21 by the pusher 53 from the above-mentioned release position (
Next, as described above, when the surface pressure is released under a state in which the seal case 21 is arranged at the arrangement location X as illustrated in
Next,
Specifically, in the second embodiment described above, the positioning member 51 and the pusher 53 of the first embodiment are arranged in an opposite manner. The positioning member 51 is positioned on the actuator 7 side of the base frame 2, and the pusher 53 is provided on a tip end 4A side of the slide case 4, which is opposite to the actuator 7. Similarly, the stopper 52 is disposed at a position opposite to the case of
Thus, in the second embodiment described above, the slide case 4 is drawn by the actuator 7 toward the left of
Industrial Applicability
The slide valve device for automatic surface pressure application and the surface pressure application method therefor according to the present invention are employed as means for controlling outflow of a molten metal between the respective vessels or the like in continuous casting facilities.
Number | Date | Country | Kind |
---|---|---|---|
2009-294034 | Dec 2009 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/JP2010/071462 | 12/1/2010 | WO | 00 | 3/15/2012 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2011/077912 | 6/30/2011 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
3511261 | Bick et al. | May 1970 | A |
4042207 | Nehrlich et al. | Aug 1977 | A |
4573616 | Shapland | Mar 1986 | A |
5582391 | McNair et al. | Dec 1996 | A |
6978980 | Plattner et al. | Dec 2005 | B2 |
20090184139 | Mitsui et al. | Jul 2009 | A1 |
Number | Date | Country |
---|---|---|
2255123 | Jun 1999 | CA |
7-80631 | Mar 1995 | JP |
11-179531 | Jul 1999 | JP |
2007-326120 | Dec 2007 | JP |
Entry |
---|
International Search Report issued Feb. 8, 2011 in International (PCT) Application No. PCT/JP2010/071462. |
Number | Date | Country | |
---|---|---|---|
20120175542 A1 | Jul 2012 | US |