JP6901363B2 - Sliding nozzle device - Google Patents

Description

The present invention relates to a sliding nozzle device that controls the flow rate of molten steel.

The sliding nozzle device is attached to, for example, the discharge port of a ladle, and generally has two upper and lower refractory plates (upper plate and lower plate) having nozzle holes and is loaded with surface pressure. The flow rate of molten steel is controlled by changing the opening degree of the nozzle hole by sliding the lower plate linearly with respect to the upper plate.

Such a sliding nozzle device generally includes a fixed metal frame that holds the upper plate and a slide metal frame that holds the lower plate and slides linearly to slide the lower plate with respect to the upper plate. It has an opening / closing metal frame that holds the slide metal frame slidably, an elastic body for applying a surface pressure between the upper and lower plates, and a driving device for driving the slide metal frame.

In this sliding nozzle device, a hydraulic cylinder or an electric cylinder is used as a drive device, and these cylinders have rods for advancing and retreating, and the tip end portion of the rod is attached to a slide metal frame. Then, the slide metal frame is driven by the advancement and retreat of the rod of the drive device.

In some sliding nozzle devices, the drive device is removable from the sliding nozzle device body. Specifically, drive devices are provided at two locations, a plate replacement workshop and a foundry, and the drive devices are attached to and detached from the sliding nozzle device main body at each location. Since one drive device can drive a plurality of sliding nozzle devices, there is an advantage of low cost. In addition, it is possible to prevent the heat effect and the contamination of the hydraulic oil during the movement of the molten steel container (ladle, etc.). Further, when preheating the molten steel container to which the sliding nozzle device is attached, the drive device may be removed in order to prevent the drive device from overheating.

For example, Patent Document 1 discloses a mechanism for attaching / detaching a connecting rod (5) connected to a sliding metal frame (25) and a drive cylinder device (3). Specifically, the flange (32d) of the hydraulic cylinder case (32) is slidably engaged with the U-shaped groove (9c) of the U-shaped member (9b) of the holding case (9), and the female of the piston rod (31). A detachable mechanism for slidingly engaging the coupling member (7) with the male coupling member (6) of the connecting rod (5) is disclosed.

The mechanism of Patent Document 1 is designed so that the piston rod (31) of the drive cylinder device (3) attaches and detaches the drive cylinder device (3) at the position of the forward limit or the reverse limit, and is usually aligned with the piston rod (3). Goes smoothly. However, when the operator removes the drive cylinder device (3) with the piston rod (31) at an intermediate position between the forward limit and the reverse limit, the next time the operator tries to install a different drive cylinder device. In addition, there is a problem that the male coupling member (6) of the connecting rod (5) of the sliding metal frame (25) and the female coupling member (7) of the piston rod (31) of the drive cylinder device (3) do not match. is there.

Further, Patent Document 2 discloses a mechanism in which a stopper is used for positioning the rod of the drive device when attaching / detaching the drive device. However, in this mechanism, if the operator forgets to use the stopper and removes the drive device at the wrong position, there is a problem that the position is displaced when another drive device is attached.

Microfilm of Jitsugyo No. 54-097409 (Jitsukai Sho No. 03-015000) International Publication No. 2017/033953

An object to be solved by the present invention is to provide a mechanism in a sliding nozzle device for attaching and detaching a driving device so that the rods of the driving device are not mistaken for advancing and retreating positions when the driving device is removed.

According to the present invention, the following sliding nozzle devices (1) to (3) are provided.
(1) A sliding nozzle device that moves the drive device in a direction perpendicular to the drive direction of the slide metal frame and attaches / detaches it to / from the sliding nozzle device main body.
The width of the tip connecting portion of the rod of the drive device is formed to be larger than the width of the main body portion of the rod of the drive device.
When removing the drive device from the sliding nozzle device main body, if the position of the tip connecting portion is not at the attachment / detachment position of the drive device, the tip connecting portion comes into contact with the obstacle portion provided on the fixed metal frame to bring the drive device. Cannot be removed,
A sliding nozzle device capable of taking out a drive device without the rod coming into contact with the obstacle only when the position of the tip connecting portion is in the attachment / detachment position of the drive device.
(2) The impaired portion includes a first impaired portion and a second impaired portion.
The first obstacle portion includes the front surface of the first obstacle portion and the rear surface of the first obstacle portion, and the front surface of the first obstacle portion and the rear surface of the first obstacle portion are driven by the maximum length of the tip connecting portion. Installed at a distance including the required clearance size when attaching and detaching
The second obstacle is installed on the main body side of the drive device from the first obstacle so that only the main body of the rod can pass through and the tip connecting portion cannot pass when the drive device is attached or detached. Sliding nozzle device.
(3) The sliding nozzle device according to (1) or (2), wherein the obstacle portion is provided on an extension portion of the fixed metal frame, and the drive device is attached / detached from the side opposite to the slide metal frame of the fixed metal frame.

According to the present invention, the obstacle portion provided in the fixed metal frame makes it possible to take out the drive device only when the position of the tip connecting portion of the rod of the drive device is at the attachment / detachment position of the drive device. As a result, it is possible to provide a mechanism in which the advancing / retreating position of the rod of the driving device is not mistaken when the driving device is removed.

It is a perspective view which shows the main part of the sliding nozzle device which is 1st Example of this invention, is the perspective view which saw the sliding nozzle device from the fixed metal frame side, and is the perspective view of the drive device (hydraulic cylinder). It is a partially enlarged view of FIG. FIG. 1 is a perspective view showing a state in which a hydraulic cylinder is mounted. FIG. 3 is a perspective view of FIG. 3 as viewed from the slide metal frame side. It is a perspective view which shows the main part of the sliding nozzle apparatus which is 2nd Embodiment of this invention, and is the perspective view which saw the sliding nozzle apparatus from the fixed metal frame side. It is a perspective view which shows the main part of the sliding nozzle apparatus which is 3rd Example of this invention, and is the perspective view which looked at the sliding nozzle apparatus from the fixed metal frame side.

Hereinafter, embodiments of the present invention will be described based on the examples shown in the drawings.

FIG. 1 is a perspective view showing a main part of a sliding nozzle device according to a first embodiment of the present invention. In the figure, the rod 162 and the tip connecting portion 163 of the hydraulic cylinder 16 as the drive device pass through the spaces 133 and 143 of the fixed metal frame 11 of the sliding nozzle device main body 10, and the substrate 161 of the hydraulic cylinder main body 164 is the fixed metal frame. It is detachable by fitting into the drive unit holder 17 of 11 and at the same time fitting the tip connecting portion 163 of the rod 162 of the hydraulic cylinder 16 into the slide metal frame side connecting portion 121 of the slide metal frame 12.

A rectangular substrate 161 is attached to the hydraulic cylinder 16 so as to penetrate the columnar rod 162 of the hydraulic cylinder and to be perpendicular to the advancing / retreating direction of the rod 162. The tip of the rod 162 of the hydraulic cylinder 16 has a columnar tip connecting portion 163 as a connecting portion. The width (outer diameter) B of the tip connecting portion 163 is larger than the width (outer diameter) C of the main body portion of the rod 162. The hydraulic cylinder 16 can be detachably attached to the drive unit holder 17 by inserting the edge portion of the substrate 161 into the gap 178 of the drive unit holder 17.

As shown in FIG. 2, which is a partially enlarged view of FIG. 1, the drive unit holder 17 has a box shape formed by a front wall 171 and a rear wall 172, two side walls 173 and 174, and a bottom wall 175. The front wall 171 has a notch 176 for inserting the main body of the rod 162, and the rear wall 172 has a notch 177 for inserting the hydraulic cylinder main body 164. The substrate 161 of the hydraulic cylinder 16 is fitted and fixed in the gap 178 between the front wall 171 and the rear wall 172. When the substrate 161 comes into contact with the inner surface of the front wall 171 and the inner surface of the rear wall 172, the hydraulic cylinder 16 can receive a reaction force when sliding the slide metal frame 12. In this way, since the substrate 161 of the hydraulic cylinder 16 is fitted so as to be perpendicular to the slide direction (slide surface) of the slide metal frame 12, the hydraulic cylinder 16 can be attached and detached in the slide direction of the slide metal frame 12. That is, it is performed by moving the rod 162 of the hydraulic cylinder 16 in a direction perpendicular to the advancing / retreating direction.

As shown in FIG. 2, the extension portion 111 of the fixed metal frame 11 is provided with a first obstacle portion 13 and a second obstacle portion 14 as obstacle portions. Of these, the first obstacle portion 13 includes the front surface 131 of the first obstacle portion and the rear surface 132 of the first obstacle portion, and these surfaces form a space 133 through which the tip connecting portion 163 passes. On the other hand, the second obstacle portion 14 includes the second obstacle portion surfaces 141 and 142 provided on the hydraulic cylinder main body side from the first obstacle portion 13, and a space 143 is formed on these surfaces. The distance D between the front surface 131 of the first obstacle portion and the rear surface 132 of the first obstacle portion is a distance obtained by adding the clearance dimension required for attaching and detaching the hydraulic cylinder to the maximum length A of the tip connecting portion 163. The distance E between the second obstacle surface 141 and 142 is set to be larger than the width (outer diameter) C of the main body of the rod 162 and smaller than the width (outer diameter) B of the tip connecting portion 163. In this embodiment, the second obstacle surface 141 and 142 are provided so as to face each other, but only one of them may be provided. Further, in this embodiment, the shape of the main body portion and the tip connecting portion 162 of the rod 162 is cylindrical, but in the case of a shape other than the cylindrical shape, the main body portion of the rod can pass through the second obstacle portion. However, it is preferable to provide the rod tip connecting portion at a position where it cannot pass.

3 and 4 show a state in which the hydraulic cylinder 16 is attached to the sliding nozzle device main body 10, and the hydraulic cylinder 16 is fixed by fitting the substrate 161 to the drive unit holder 17, and the tip of the hydraulic cylinder 16 is fixed. The connecting portion 163 is fitted to the slide metal frame side connecting portion 121. Further, although not shown, plates are held in the fixed metal frame 11 and the slide metal frame 12, respectively, and the slide metal frame 12 can be slid by the hydraulic cylinder 16. In addition, in FIGS. 1 to 4, in order to make the configuration of the invention easy to understand, the opening / closing metal frame, the elastic body, etc. for holding the slide metal frame 12 and pressing it against the fixed metal frame 11 side are omitted. For these, known techniques can be adopted. Further, in FIG. 4, the bottom wall 175 of the drive unit holder is removable, and the hydraulic cylinder 16 can also be removed from the slide metal frame 12 side.

Next, the procedure for attaching / detaching the hydraulic cylinder will be described with reference to FIGS. 1 to 4. The following description is for attaching and detaching two hydraulic cylinders having the same stroke length.

In the states of FIGS. 1 to 4, the hydraulic cylinder 16 is in the forward limit position, and the slide metal frame 12 is in the fully closed position where the distance between the nozzle holes of the two plates is the longest. In this state, the position of the first obstacle portion 13 is designed in advance so as to be a position (position of the forward limit of the hydraulic cylinder) through which the tip connecting portion 163 of the hydraulic cylinder 16 can pass. Here, the distance D between the front surface 131 of the first obstacle portion forming the first obstacle portion 13 and the rear surface 132 of the first obstacle portion is slightly larger than the maximum length A of the tip connecting portion 163. Specifically, the distance D is 31 mm, the maximum length of the tip connecting portion is 30 mm, and the gap is 0.5 mm on one side. At this time, it is sufficient that there is a space in the width direction that does not interfere with the passage of the tip connecting portion 163. By pulling out the hydraulic cylinder 16 from the drive unit holder 17 in the state of FIGS. 3 and 4, at the same time, the tip connecting portion 163 is disconnected from the slide metal frame side connecting portion 121, so that the hydraulic cylinder 16 can be removed. At this time, if the advancing / retreating position of the rod 162 of the hydraulic cylinder 16 is wrong, the tip connecting portion 163 cannot contact the first obstacle portion 13 or the second obstacle portion 14 and pass through the spaces 133 and 143. The position of the slide metal frame 12 can be corrected by noticing an error in the position of the slide metal frame 12 (advance / retreat position of the rod 162 of the hydraulic cylinder 16).

Specifically, in this embodiment, the width (outer diameter) B of the tip connecting portion 163 of the rod 162 is formed to be larger than the width (outer diameter) C of the main body portion of the rod 162, so that the hydraulic cylinder 16 has a forward limit. If the position of the tip connecting portion 163 is not in the attachment / detachment position of the hydraulic cylinder 16, the tip connecting portion 163 comes into contact with the second obstacle portion 14 and the hydraulic cylinder 16 cannot be taken out. The width of the tip connecting portion and the width of the main body of the rod are the maximum widths in the projection drawing in the attachment / detachment direction of the hydraulic cylinder.

On the other hand, in the present embodiment, since the second obstacle portion 14 does not come into contact with the main body portion of the rod 162, the hydraulic cylinder 16 is in the position of the forward limit (the position of the tip connecting portion 163 is in the attachment / detachment position of the hydraulic cylinder 16). ), The hydraulic cylinder 16 can always be taken out. Since the two plates are sandwiched by high pressure when the hydraulic cylinder 16 is removed, the slide metal frame 12 does not shift after the hydraulic cylinder 16 is removed.

Next, when the hydraulic cylinder 16 is attached, the tip connecting portion 163 of the hydraulic cylinder 16 is set to the forward limit position as shown in FIG. If the hydraulic cylinder 16 is in the forward limit position, the tip connecting portion 163 and the main body portion of the rod can pass through the spaces 133 and 143 provided in the fixed metal frame 11, and thus pass through the fixed metal frame 11. Then, the tip connecting portion 163 can be fitted to the slide metal frame side connecting portion 121 of the slide metal frame 12.

After the molten steel is discharged, the hydraulic cylinder 16 is attached and detached at two places, a plate replacement work place (maintenance place) and a turret of the foundry before and after casting. On the tarrate, the extension portion 111 of the fixed metal frame of the sliding nozzle device protrudes outside the molten steel container, so that the hydraulic cylinder 16 is hung from above the fixed metal frame 11 by a crane and assisted by human hands. It can be installed with a robot or the like. After mounting the hydraulic cylinder 16 on the drive unit holder 17, it is not necessary to fix the hydraulic cylinder 16 in particular because the sliding nozzle device does not tilt or reverse when injecting it into the tundish as it is, but it is necessary. It may be fixed to prevent it from falling off.

In this way, since the advancing / retreating position of the rod 162 of the hydraulic cylinder 16 is determined so that the hydraulic cylinder 16 can be removed, it is always possible to notice that the advancing / retreating position of the rod 162 is wrong, and the position is immediately corrected. it can. As a result, the hydraulic cylinder 16 can be smoothly mounted even when it is mounted at the following location.

FIG. 5 shows an example in which, in the embodiments of FIGS. 1 to 4, another obstacle portion through which the tip connecting portion 163 can pass is provided as a third obstacle portion 15 on the hydraulic cylinder side. The first obstacle portion 13 is in the fully closed position of the slide metal frame 12, and the third obstacle portion 15 is in the fully open position of the slide metal frame 12, so that the tip connecting portion 163 can pass through. Here, the fully closed position is the position where the nozzle holes of the two plates are farthest from each other and the hydraulic cylinder is the forward limit, and the fully open position is the position where the nozzle holes of the two plates match and the hydraulic cylinder is This is the position where the retreat limit is reached. Further, the width and length of the third obstacle portion 15 are the same dimensions as those of the first obstacle portion 13.

By providing the third obstacle portion 15 in this way, the hydraulic cylinder 16 can be removed when the molten steel container is preheated, so that overheating of the hydraulic cylinder 16 can be prevented. That is, since the slide metal frame 12 is set to the fully open position when the molten steel container is preheated, the hydraulic cylinder 12 can be attached and detached even at the fully open position.

Further, the erroneous attachment / detachment prevention lid 151 can be detachably attached to the third obstacle portion 15 as shown in FIG. When the erroneous attachment / detachment prevention lid 151 is attached in this way, the tip connecting portion 163 can pass only in the fully closed position as in the embodiment of FIGS. 1 to 4. On the other hand, when the erroneous attachment / detachment prevention lid 151 is removed, the tip connecting portion 163 can pass through at both the fully closed position and the fully open position as in the embodiment of FIG.

In the above embodiment, an example in which the drive device (hydraulic cylinder 16) is attached / detached from the back side (opposite side to the slide metal frame) of the fixed metal frame has been described. Even when the drive device is attached / detached from the above, the mechanism for preventing an error in the removal position of the drive device can be provided by providing the obstacle portion by the same method as in the above embodiment. Similarly, it can be attached / detached from the slide metal frame side, and is not restricted by the attachment / detachment direction of the drive device.
Further, although the above embodiment uses hydraulic cylinders having the same stroke length, hydraulic cylinders having different stroke lengths can also be used. In this case, as disclosed in Patent Document 2, a stopper can be used to position the tip connecting portion of the rod.

10 Sliding nozzle device body 11 Fixed metal frame 111 Extension of fixed metal frame 12 Slide metal frame 121 Sliding metal frame side connecting part 13 First obstacle part 131 First obstacle part Front 132 First obstacle part Rear surface 133 Space 14 Second obstacle 141 Second obstacle surface 142 Second obstacle surface 143 Space 15 Third obstacle 151 Accidental attachment / detachment prevention lid 16 Hydraulic cylinder 161 Board 162 Rod 163 Tip connection 164 Hydraulic cylinder body 17 Drive Holder 171 Front wall 172 Rear wall 173 Side wall 174 Side wall 175 Bottom wall 176 Notch 177 Notch 178 Gap A Maximum length of tip connecting part B Width of tip connecting part (outer diameter)
Width (outer diameter) of the main body of the C rod
D Distance between the front surface of the first obstacle and the rear surface of the first obstacle E Distance between the surfaces of the second obstacle

Claims (3)

A sliding nozzle device that moves the drive device in a direction perpendicular to the drive direction of the slide metal frame and attaches / detaches it to / from the sliding nozzle device body.
The width of the tip connecting portion of the rod of the drive device is formed to be larger than the width of the main body portion of the rod of the drive device.
When removing the drive device from the sliding nozzle device main body, if the position of the tip connecting portion is not at the attachment / detachment position of the drive device, the tip connecting portion comes into contact with the obstacle portion provided on the fixed metal frame to bring the drive device. Cannot be removed,
A sliding nozzle device capable of taking out a drive device without the rod coming into contact with the obstacle only when the position of the tip connecting portion is in the attachment / detachment position of the drive device. The impaired portion includes a first impaired portion and a second impaired portion.
The first obstacle portion includes the front surface of the first obstacle portion and the rear surface of the first obstacle portion, and the front surface of the first obstacle portion and the rear surface of the first obstacle portion are driven by the maximum length of the tip connecting portion. Installed at a distance including the required clearance size when attaching and detaching
The first aspect of claim 1, wherein the second obstacle is installed on the main body side of the drive device from the first obstacle so that only the main body of the rod can pass through and the tip connecting portion cannot pass when the drive device is attached or detached. Sliding nozzle device. The sliding nozzle device according to claim 1 or 2, wherein the obstacle portion is provided in an extension portion of the fixed metal frame, and the drive device is attached / detached from the side opposite to the slide metal frame of the fixed metal frame.

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