JP5079564B2 - Open / close assist mechanism for open / close metal frame - Google Patents

Description

The present invention provides a sliding nozzle device that takes out molten metal from the inside of a molten metal container while controlling the flow rate of the molten metal container so that the lower plate brick is in close contact with the lower surface of the upper plate brick and is slidably supported. The present invention relates to an opening / closing assist mechanism for an opening / closing metal frame that assists in the opening / closing operation of an opening / closing metal frame coupled to a fixed metal frame fixed to a bottom portion.

Conventionally, when a molten metal is taken out from a hot water outlet formed at the bottom of a molten metal container such as a ladle or tundish, a sliding nozzle device is attached to the hot water outlet to control the flow rate of the molten metal. Here, the sliding nozzle device includes an upper plate brick connected to the tap through an upper nozzle, a fixed metal frame that is installed at the bottom of the molten metal container and holds and fixes the upper plate brick, and a lower surface of the upper plate brick. A lower plate brick that is placed in close contact with the slide plate, a slide metal frame that holds the lower plate brick and slides against the upper plate brick, and is attached to the fixed metal frame so as to be openable and closable. An opening / closing metal frame is provided that is slidably supported and includes pressing means for pressing the slide metal frame against the fixed metal frame in the closed position to bring the upper plate brick and the lower plate brick into close contact with each other. Then, by changing the relative position of the lower plate brick with respect to the upper plate brick, an upper nozzle hole formed in the upper plate brick and communicating with the upper nozzle and a lower nozzle formed in the lower plate brick and discharging molten metal By adjusting the degree of overlap with the connected lower nozzle hole, the flow rate of the molten metal passing through the upper and lower nozzle holes is adjusted.

Therefore, if one or both of the upper and lower plate bricks are worn out or damaged and need to be replaced, the pressing means is operated to release the close contact between the lower plate bricks and open and close manually. After opening the metal frame, the upper and lower plate bricks are exposed, the bricks are replaced, and the opening and closing metal frame is again closed manually. Here, the exchange of the upper and lower plate bricks is performed in a state where there is residual heat in the molten metal container in order to increase the operating rate of the molten metal container, and the opening and closing of the opening and closing metal frame is performed at a high temperature by heat radiation from the molten metal container. It becomes work. Further, since the lower plate brick and the slide metal frame are accommodated in the opening / closing metal frame, a large force is required to open / close the opening / closing metal frame. Therefore, in order to facilitate the opening / closing operation of the opening / closing metal frame, an apparatus for automatically opening / closing the opening / closing metal frame has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 3538186

However, in the invention described in Patent Document 1, the reciprocating motion of the cylinder rod sliding on the lower plate brick is converted into the rotational motion of the pinion by the rack, and the rotational motion is applied to the crank by the support shaft coupled to the pinion. The cover is opened and closed by rotating the arm that supports the cover by the pivot pin of the crank that is transmitted, and there is a problem that the device configuration becomes complicated and the manufacturing cost increases. Furthermore, if foreign matter adheres to a portion that operates in conjunction with the rack, pinion, or the like, normal operation cannot be guaranteed, resulting in an increase in the maintenance burden of the apparatus.

The present invention has been made in view of such circumstances, and when opening and closing the opening and closing metal frame of the sliding nozzle device manually, the opening and closing operation of the opening and closing metal frame is facilitated by assisting the opening and closing operation of the opening and closing metal frame. It is an object of the present invention to provide an opening / closing assist mechanism for an opening / closing metal frame that can be used.

The opening / closing assist mechanism for the opening / closing metal frame according to the present invention that meets the above object supports the lower plate brick that slides in close contact with the lower surface of the upper plate brick fixed to the bottom of the molten metal container via the fixed metal frame. And an opening / closing assist mechanism for the opening / closing metal frame that assists the opening / closing operation of the opening / closing metal frame connected to the fixed metal frame via a connection pin arranged along the sliding direction of the lower plate brick. There,
Rotation drive means attached to the fixed metal frame and provided with a rotation output shaft parallel to the connecting pin;
An opening / closing connection member having a base side connected to the rotation output shaft and a front side connected to the opening / closing metal frame to convert the rotation force around the rotation output shaft into a rotation force around the connection pin of the opening / closing metal frame; Yes.

In the opening / closing assist mechanism for the opening / closing metal frame according to the present invention, the opening / closing connecting member includes an arm portion that is mounted orthogonal to the rotation output shaft, and a tip provided on the front side of the arm portion in parallel with the rotation output shaft. It is preferable that the side has a connecting part connected to the opening and closing metal frame.
When the rotation output shaft is rotated, the arm portion mounted orthogonal to the rotation output shaft rotates about the rotation output shaft, and the connecting portion on the front side of the arm portion also rotates about the rotation output shaft. Here, since the rotation output shaft and the connecting portion are arranged in parallel at a distance, the rotational force around the rotation output shaft of the connecting portion is larger than the rotational force of the rotation output shaft itself. As a result, the opening / closing metal frame rotates around the rotation output shaft together with the connecting portion, and the base side of the opening / closing metal frame rotates around the connecting pin, so that the opening / closing metal frame is opened and closed.

In the opening / closing assist mechanism for the opening / closing metal frame according to the present invention, the rotation driving means may be a rotary actuator using compressed air as a working fluid.
By using the rotary actuator, the rotational driving force can be directly generated, the configuration of the rotational driving means can be simplified, and maintenance management becomes easy. Further, since compressed air that can be easily used in the factory is used as the working fluid, the convenience of the opening / closing assist mechanism for the opening / closing metal frame can be improved.

In the opening / closing assist mechanism for the opening / closing metal frame according to the present invention, the rotary actuator is provided with first and second compressed air receiving ports for receiving compressed air for rotating the rotating output shaft forward and backward, respectively. It is preferable.
Accordingly, by selecting the first and second compressed air receiving ports and allowing compressed air to flow in, the rotation output shaft can be rotated forward or backward, and the opening and closing metal frame can be moved in the opening direction, It can be moved in the closing direction.

In the opening / closing assist mechanism for the opening / closing metal frame according to the present invention, it is preferable that the rotation output shaft is connected to a rotation shaft of the rotary actuator via a universal joint.
As a result, when the opening and closing metal frame moved in the opening direction or the closing direction is manually rotated to the final state (open state or closed state), only the play allowance generated between the opening and closing metal frame and the connecting pin is obtained. Even if an uncertain movement occurs in the opening / closing metal frame, the action of the uncertain movement can be prevented from being transmitted to the rotary shaft of the rotary actuator, and the rotary actuator can be prevented from being damaged.

In the opening / closing assist mechanism for the opening / closing metal frame according to the present invention, the opening / closing metal frame can be rotated around the connecting pin while supporting the weight of the opening / closing metal frame during the opening / closing operation of the opening / closing metal frame. It is possible to reduce the manpower required for the opening and closing operation. As a result, the opening / closing operation of the opening / closing metal frame can be facilitated to improve the working efficiency, and the working time at high temperatures can be shortened to ensure safety.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a bottom view of a sliding nozzle device to which an opening / closing assist mechanism for an opening / closing metal frame according to an embodiment of the present invention is applied, and FIG. 2 is a sliding nozzle to which an opening / closing assist mechanism for the opening / closing metal frame is applied. 3 is a bottom view of the opening / closing assist mechanism for the opening / closing metal frame, FIG. 4 is a side view of the opening / closing assist mechanism for the opening / closing metal frame, and FIG. 5 is an opening / closing assist mechanism for the opening / closing metal frame. FIG. 6 is a perspective view of the sliding nozzle device, FIG. 6 is an explanatory view showing a state when the opening / closing metal frame starts to be opened by the opening / closing assist mechanism of the opening / closing metal frame, and FIG. It is explanatory drawing which shows the state at the time of opening.

As shown in FIGS. 1 to 4, an opening / closing assist mechanism 10 for an opening / closing metal frame according to an embodiment of the present invention includes an upper plate brick 13 (see FIG. 6) and a lower plate brick 14. Applied to the sliding nozzle device 12 for controlling the flow rate, and supports the lower plate brick 14 that slides in close contact with the lower surface of the upper plate brick 13 fixed to the bottom of the molten metal container 11 via the fixed metal frame 15. The opening and closing operation of the opening and closing metal frame 17 connected to the fixed metal frame 15 through the connection pins 16 arranged along the sliding direction of the lower plate brick 14 is supported. The rotary drive means is an example of a rotary drive means attached to the frame 15 and provided with a rotary output shaft 18 parallel to the connecting pin 16. The rotary actuator 19 uses compressed air as a working fluid, and the base side is connected to the rotary output shaft 18. Side has an opening connecting member 20 to connecting pin 16 around the rotational force of the coupling to rotate the output shaft 18 around the rotational force and the opening and closing metal frame 17 opening and closing metal frame 17. This will be described in detail below.

The lower plate brick 14 is held in a slide metal frame 44 slidably supported by the opening / closing metal frame 17. The opening / closing metal frame 17 is pressed against the fixed metal frame 15 by a pressing means (for example, a spring) (not shown) at a position where the open / close metal frame 17 is closed with respect to the fixed metal frame 15. Further, the slide metal frame 44 supported by the open / close metal frame 17 in the closed state is connected to the piston rod 46 of the fluid pressure cylinder 45 attached to the fixed metal frame 15. In addition, a long hole 47 is formed in the central portion of the opening / closing metal frame 17 along the sliding direction of the lower plate brick 14, and a lower nozzle (not shown) attached to the lower plate brick 14 in the long hole 47. Z) penetrates. Thus, when the fluid pressure cylinder 45 is driven and the slide metal frame 44 is slid with respect to the opening and closing metal frame 17, the lower plate brick 14 held by the slide metal frame 44 is placed on the upper surface of the fixed metal frame 15. Can be slid in a state of being in close contact with the lower surface of the upper plate brick 13 held on the surface. A splash prevention plate 48 is provided below the slide metal frame 44 to prevent molten metal splash generated when molten metal is discharged from the lower nozzle from adhering to the lower surface of the upper plate brick 13. Yes.

The rotary actuator 19 includes a main body portion 21 provided with a rotational force generation mechanism (not shown) that generates a rotational force from a flow of compressed air, and a base side connected to an output portion of the rotational force generation mechanism, and a distal side of the main body portion 21. And a rotating shaft 23 provided so as to protrude from the front side wall 22. The main body 21 receives first and second compressed air for rotating the rotation shaft 23 forward (rotation in the direction in which the opening / closing metal frame 17 is opened) and reverse rotation (rotation in the direction in which the opening / closing metal frame 17 is closed), respectively. Second compressed air receiving ports 24 and 25 are provided, respectively.

The rotary actuator 19 is an attachment member fixed to the side of the fixed metal frame 15 on the side where the connecting pin 16 is arranged so that the rotating shaft 23 protruding from the main body 21 is parallel to the connecting pin 16. 26 is attached. Here, the attachment member 26 is an example of a fastening member including a support plate material 27 attached to a side portion of the fixed metal frame 15 and a rear side wall 28 standing on the support plate material 27 and facing the front side wall 22 of the main body portion 21. The mounting plate 30 is fixed via bolts 29, and is attached to the upper and lower portions of the mounting plate 30, sandwiching the upper and lower ends of the main body 21, and the lower mounting plates 31 and 32.

The rotation output shaft 18 is connected to the rotation shaft 23 via a universal joint 33. Here, the universal joint 33 is orthogonal to the rotary shaft 23 at the front end of the base connecting portion 35 and the base connecting portion 35 connected via the first key 34 that is externally mounted on the front side of the rotary shaft 23. A rotating part 37 rotatably provided via a first attaching pin 36, and a rotating part 23 and a second attaching pin 38 orthogonal to the first attaching pin 36. The base side is connected, and the front side is covered with the rotary output shaft 18 and has a front side connecting portion 40 connected via the second key 39. The opening / closing connecting member 20 is provided in parallel with the rotation output shaft 18 on the front side of the arm portion 41 and an arm portion 41 whose base side is connected to the rotation output shaft 18 and whose front side extends radially outward of the rotation output shaft 18. The front side has a connecting portion 42 connected to the opening / closing metal frame 17.

With this configuration, when the rotation output shaft 18 is rotated, the arm portion 41 that is connected orthogonally to the rotation output shaft 18 rotates around the axis of the rotation output shaft 18, and the connection portion 42 can be rotated around the axis of the rotation output shaft 18. Here, since the rotation output shaft 18 and the connecting portion 42 are arranged in parallel at a distance, the rotational force around the rotation output shaft 18 of the connecting portion 42 is larger than the rotational force of the rotation output shaft 18 itself. . As a result, the opening / closing metal frame 17 rotates together with the connecting portion 42, and the opening / closing metal frame 17 rotates around the connection pin 16 to which the base side is attached, thereby opening the opening / closing metal frame 17. It can be moved in the direction or in the closing direction. As a result, when the opening / closing handle 43 is manually opened / closed, the amount of opening / closing work performed manually is reduced, and the opening / closing operation of the opening / closing frame 17 is facilitated.

In addition, since the universal joint 33 is provided between the rotation output shaft 18 and the rotation shaft 23, the rotation output shaft 18 is connected to the rotation shaft 23 of the rotary actuator 19 in a swingable state. . For this reason, when the opening / closing metal frame 17 is moved manually until it is in the open state or the closed state, the opening / closing metal frame 17 is uncertain for the play allowance generated between the opening / closing metal frame 17 and the connecting pin 16. Even if a movement (for example, twist with respect to the connecting pin 16) occurs, it is possible to prevent the action of this uncertain movement from being transmitted to the rotary shaft 23 of the rotary actuator 19, and to prevent the rotary actuator 19 from being damaged. be able to.

Next, a method for opening and closing the opening and closing metal frame 17 using the opening and closing metal frame opening and closing assist mechanism 10 according to one embodiment of the present invention will be described.
When opening the opening / closing metal frame 17, as shown in FIG. 5, a compressed air supply hose (not shown) is connected to the first compressed air receiving port 24 provided in the main body 21, and compressed air is supplied into the rotary actuator 19. Supply. As a result, the rotary shaft 23 of the rotary actuator 19 rotates in the direction to open the open / close metal frame 17, and the arm portion 41 of the open / close connecting member 20 is rotated via the rotary output shaft 18 connected to the rotary shaft 23. Rotating about the axis of the shaft 23), the connecting portion 42 of the opening / closing connecting member 20 rotates about the axis of the rotation output shaft 18.

When the connecting portion 42 rotates about the axis of the rotation output shaft 18, the opening / closing metal frame 17 connected to the connecting portion 42 also rotates together with the connecting portion 42. Here, the open / close metal frame 17 is attached to the fixed metal frame 15 for fixing the upper plate brick 13 to the bottom of the molten metal container 11 by using the connecting pin 16, so as shown in FIGS. 6 and 7. In addition, the opening / closing metal frame 17 rotates in the opening direction around the connection pin 16 while rotating around the axis of the rotation output shaft 18 together with the connection portion 42. And since the rotating shaft 23 of the rotary actuator 19 stops when it rotates a preset rotation angle, for example, 100 to 150 degrees, the opening and closing metal frame 17 also opens and stops 100 to 150 degrees. Therefore, the opening / closing metal frame 17 is moved to the final position of the open state by using the opening / closing handle 43 provided on the opening / closing metal frame 17, thereby completing the opening operation of the opening / closing metal frame 17.

When closing the opening / closing metal frame 17, a compressed air supply hose (not shown) is connected to the second compressed air receiving port 25 provided in the main body 21, and compressed air is supplied into the rotary actuator 19. As a result, the rotary shaft 23 of the rotary actuator 19 rotates in the direction to close the open / close metal frame 17, and the arm portion 41 of the open / close connecting member 20 is rotated via the rotary output shaft 18 connected to the rotary shaft 23. Rotating about the axis of the shaft 23), the connecting portion 42 of the opening / closing connecting member 20 rotates about the axis of the rotation output shaft 18.

When the connecting portion 42 rotates about the axis of the rotation output shaft 18, the opening / closing metal frame 17 connected to the connecting portion 42 also rotates together with the connecting portion 42, and the opening / closing metal frame 17 closes around the connecting pin 16. In the direction, for example, it closes 100 to 150 degrees and stops. Therefore, the closing operation of the opening / closing metal frame 17 is completed by moving the opening / closing metal frame 17 to the final position in the closed state using the opening / closing handle 43 provided on the opening / closing metal frame 17.

As described above, when the opening / closing metal frame 17 is moved to the final position of the open / closed state, the opening / closing metal frame 17 is first opened using the opening / closing assist mechanism 10 of the open / closed metal frame. And then the opening / closing metal frame 17 is manually opened using the opening / closing handle 43 and moved to the final position in the closed state. 17 can be easily opened and closed.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, although the rotation angle range of the rotary shaft of the rotary actuator is set to 100 to 150 degrees, the rotation angle range can be reduced or increased, and the rotation angle corresponds to the final position in the open state. It can also be set as an angle. As a result, the amount of opening and closing work performed manually can be further reduced.

It is a bottom view of a sliding nozzle device to which an opening / closing assist mechanism for an opening / closing metal frame according to an embodiment of the present invention is applied. It is a side view of a sliding nozzle device to which the opening / closing assist mechanism of the opening / closing metal frame is applied. It is a bottom view of the opening-and-closing auxiliary mechanism of the opening-and-closing metal frame. It is a side view of the opening-and-closing auxiliary mechanism of the opening-and-closing metal frame. It is a perspective view of a sliding nozzle device to which an opening / closing assist mechanism for an opening / closing metal frame is applied. It is explanatory drawing which shows the state when the opening-and-closing metal frame begins to open with the opening-and-closing auxiliary mechanism of the opening-and-closing metal frame. It is explanatory drawing which shows the state at the time of opening an opening-and-closing metal frame with the opening-and-closing auxiliary mechanism of the opening-and-closing metal frame.

Explanation of symbols

10: Opening / closing assist mechanism for opening / closing metal frame, 11: Molten metal container, 12: Sliding nozzle device, 13: Upper plate brick, 14: Lower plate brick, 15: Fixed metal frame, 16: Connecting pin, 17: Opening / closing metal Frame, 18: Rotation output shaft, 19: Rotary actuator, 20: Opening / closing connecting member, 21: Main body, 22: Front side wall, 23: Rotating shaft, 24: First compressed air receiving port, 25: Second compression Air receiving port, 26: mounting member, 27: support plate material, 28: rear side wall, 29: bolt, 30: mounting plate material, 31: upper mounting plate material, 32: lower mounting plate material, 33: universal joint, 34: first Key: 35: Base side connecting part, 36: First mounting pin, 37: Rotating part, 38: Second mounting pin, 39: Second key, 40: Front side connecting part, 41: Arm part, 42: Connecting part, 43: Opening / closing handle , 44: slide metal frame, 45: fluid pressure cylinder, 46: piston rod, 47: long hole, 48: Splash shield plate

Claims (5)

The lower plate brick that slides in close contact with the lower surface of the upper plate brick fixed to the bottom of the molten metal container via a fixed metal frame is supported and arranged along the sliding direction of the lower plate brick. An opening / closing assist mechanism for the opening / closing metal frame that assists in the opening / closing operation of the opening / closing metal frame connected to the fixed metal frame so as to be openable / closable via a connecting pin,
Rotation drive means attached to the fixed metal frame and provided with a rotation output shaft parallel to the connecting pin;
An opening / closing connection member having a base side connected to the rotation output shaft and a front side connected to the opening / closing metal frame so that a rotational force around the rotation output shaft is turned around the connection pin of the opening / closing metal frame; An opening / closing assist mechanism for the opening / closing metal frame. 2. The opening / closing assist mechanism for an opening / closing metal frame according to claim 1, wherein the opening / closing connecting member is provided in parallel with the rotation output shaft on an end side of the arm portion that is attached orthogonal to the rotation output shaft. An opening / closing assist mechanism for the opening / closing metal frame, characterized in that the front side has a connecting portion connected to the opening / closing metal frame. The opening / closing assist mechanism for the opening / closing metal frame according to any one of claims 1 and 2, wherein the rotation driving means is a rotary actuator using compressed air as a working fluid. mechanism. 4. The opening / closing assist mechanism for the opening / closing metal frame according to claim 3, wherein the rotary actuator is provided with first and second compressed air receiving ports for receiving compressed air for rotating the rotating output shaft forward and backward, respectively. An opening / closing assist mechanism for the opening / closing metal frame. 5. The opening / closing assist mechanism for an opening / closing metal frame according to claim 3, wherein the rotation output shaft is connected to a rotation shaft of the rotary actuator via a universal joint. Frame opening / closing assist mechanism.

Images