JPH0415411Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention requires a cassette-type sliding nozzle device for adjusting the flow rate of molten metal or a nozzle changing device for casting that houses a structure having molten metal flow holes. The present invention relates to a structure for aligning and fixing molten metal flow holes to the parts of the present invention.

[Conventional technology]

A combination of two or three plate bricks,
The sliding nozzle device, which is made by moving the lower or middle plate brick linearly or rotationally, is used for adjusting the flow rate of molten metal in various containers such as ladles, tundishes, pig iron mixers, and gutters.
In addition, the casting nozzles connected thereto and their exchange devices have come to be widely used for the purpose of improving the efficiency of continuous casting.

Note that the structure having molten metal flow holes as used herein refers to a fixed plate, a sliding plate, upper and lower nozzles, a casting nozzle, and the like.

For example, this sliding nozzle device is assembled, installed, etc. in a high-temperature work environment. Therefore, in order to easily perform work in a high-temperature atmosphere, a so-called cassette-type sliding nozzle device was considered, in which the fixed plate, sliding plate, lower nozzle, or upper nozzle are assembled together with the surface pressure setting mechanism at a separate location. It is being In this cassette type, although there are problems with the assembly structure, the simpler the structure when actually attached to a container, the easier the work will be in a high temperature atmosphere in a shorter time. Also,
Similar improvements have been made to the work environment for casting nozzle replacement work.

For example, in Japanese Utility Model Publication No. 49-32569, a sliding nozzle device in the form of a cassette is attached to the loading section at the bottom of the pot using screws. Further, Japanese Patent Publication No. 60-21818 discloses fixing a cassette sliding closure with bolts and wedges supported on the base plate of a casting pan.

Furthermore, in JP-A-61-37362, in order to simplify the work of replacing the casting nozzle, the replacement device is connected to a bracket extending from the bottom of the storage frame of the sliding nozzle device or from the bottom of the container, and a bracket on the side of the replacement device. An example is shown in which the parts are fixed with pins or bolts.

[Problem that the invention attempts to solve]

Attaching a cassette-type sliding nozzle device to a container, etc. reduces the installation time and makes it easier to install when compared to assembling the entire sliding nozzle device on the spot. Work can be simplified. However, the mounting structure itself still has some insufficiencies, leading to various problems.

For example, in the case of fixing with screws as in Japanese Utility Model Publication No. 49-32569, since bolts or nuts are used, it is necessary to tighten them with a spanner, an air tool, etc. However, screws exposed to high-temperature atmospheres promote defects such as seizing, wear of thread grooves, and distortion of bolts, and may make attachment and detachment operations difficult.

In addition, when using a wedge or a cotter as shown in Japanese Patent Publication No. 60-21818, elongated holes are provided in the bolts supported on the base plate of the cast pan, and holes in the casing of the cassette sliding closure machine are used. It is necessary to allow the bolts to pass through the hole bricks on the container side, the side bottom plate, and the top plate, but it is necessary to make sure that the hole bricks on the container side, the side bottom plate, and the top plate are in close contact with each other without any gaps, but the stopping position when driving wedges, cotters, etc. is uncertain. Furthermore, when the sliding nozzle device is operated, the wedges, bolts, etc. gradually shift during use and the adhesion weakens, so it is necessary for the operator to constantly check and drive in these stops. There were safety issues as the inspectors were accompanied during inspections, and it was hoped that the labor would be lighter. In Japanese Patent Application Laid-open No. 61-37362, the casting nozzle changing device is fixed with pins or bolts, but there is a risk of it falling off and screwing is required, so a simple yet reliable fixing device is desired. was.

The present invention enables the sliding nozzle device or the casting nozzle to be attached to the bottom of the container by integrally incorporating a stopper that functions as a wedge or a cotter into the cassette-type sliding nozzle device or the casting nozzle changing device. Installation of nozzle exchange device for
The purpose is to facilitate removal work.

[Means for solving problems]

In order to achieve this purpose, the fixing device of the present invention provides a rotating body on the outside of a storage frame that houses a structure having molten metal flow holes, and a rotating bearing block that rotatably supports the rotating body. A screw provided on both the left and right sides, a screw provided inside the rotating body and a screw of a threaded rod are screwed together by a feed screw mechanism, a stop is fixed to the tip of the threaded rod, and a position where the stop comes into contact. It is characterized in that a storage metal frame support block is provided which is fixed to the storage metal frame.

[Effect]

When replacing a structure such as the sliding nozzle device of the present invention, the stop attached to the tip of the threaded rod is removed by rotating the rotating body with an attaching/detaching machine having a rotational force transmission mechanism that engages with screws. After retreating to the rotating bearing block side and letting the stopper come out from the holding block, the cassette support device is lowered and replaced with a new structure with a similar fixing device, and when this is removed. By operating the fixing device in the reverse order, it is attached to the bottom of the container and the replacement work is completed. At this time, pressing force can be uniformly applied by rotating the threaded rod, and the structure is held between the storage frame support block and the holding block by the stopper.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 shows a double-winged fixing device for attaching a sliding nozzle device to the bottom of a container, and FIG. 2 is a view of it from below.

The sliding nozzle device 1 is of a cassette type in which a structure (not shown) having molten metal flow holes is housed in a housing frame 2 equipped with a surface pressure setting mechanism (not shown). The sliding nozzle device 1 is attached to the bottom A of the container by a fixing device 3 provided on the outer wall of the storage frame 2.

This fixing device is a sliding nozzle device 1
The sliding plate has a symmetrical structure on both outer walls parallel to the direction in which it moves, and with the rotating body 4 as the center. The rotating body 4 includes a toothed portion 5 for obtaining rotational driving force from a detachable/detachable machine (not shown) and this toothed portion 5.
It consists of a turnbuckle 6 that rotates integrally with the turnbuckle.
The turnbuckle 6 is rotatably supported at both ends by rotary bearing blocks 7.

The rotating bearing block 7, as shown in FIG.
Fixed metal frame 8 for fixing to the outer wall of the storage metal frame 2
A turnbuckle 6 is inserted through an Oiles metal 9 having an outer skin, and the rotating body 4 is supported pivotally by this. A threaded rod 10 having reverse grooves is screwed into the turnbuckle 6 which is pivotally supported by the rotary bearing block 7 so as to move forward and backward symmetrically. A stopper 11 is fixed to the tip of each threaded rod 10. The support 11 is in contact with the housing frame support block 12 on one of its four longitudinal surfaces, and the opposite surface is tapered.

The container bottom A corresponding to the fixing device 3 on the side of the cassette-type sliding nozzle device 1 has four
A holding block 13 is arranged which is carried vertically from the point. This holding block 13 is attached to the stopper 1
1 has a horizontal hole 14 passing through it, and the bottom surface has a stopper 11.
The angle matches the taper of the In addition,
In order to prevent lateral rotation of the stopper 11 while moving forward and backward,
It is preferable to attach a guide (not shown) to the storage metal frame support block 12 by sandwiching the stopper 11 therebetween. Furthermore, it is preferable to provide a cassette positioning block 15 further outside the container bottom A in order to confirm the position of the sliding nozzle device 1.

In the case of this double-wing type fixing device 3, in the embodiment, it is provided on the outer side of the storage frame 2 on the side parallel to the moving direction B of the sliding plate shown by the arrow in the drawing, but the container bottom A and the storage frame 2 are Of course, it can also be provided on the outer side perpendicular to the moving direction B of the sliding plate if there is sufficient space between it and the outside.

FIG. 4 is a schematic diagram of the single-wing type fixing device 3, in which a stop plate 18 is attached to the rotary bearing block 7 on the opposite side of the stopper 11 to prevent the feed screw 6-1 from slipping out, and a flange portion 19 is attached to the turnbuckle 6. It is sufficient if the structure is such that it provides the following.

These double-wing type or single-wing type can be used singly, in plurality, or in combination as necessary for a linear or rotationally movable sliding nozzle device.

FIG.
This is an embodiment, and in this case, as shown in the figure, a holding block 13 supported from the lower part of the housing frame 2 of the sliding nozzle device 1 or the bottom A of the container is provided, and the housing frame 2 of the casting nozzle is provided with the holding block 13 of the present invention. A fixing device 3 is provided. Then, it is preferable to fix the casting nozzle 21 to the sliding nozzle device 1 before loading it. Regardless of whether the sliding nozzle device 1 moves linearly or rotationally, as long as the lower nozzle 22 does not follow the sliding plate and remains stationary, the sliding nozzle device 1 is not limited to the cassette type, and can be used to move the plate brick or the upper and lower parts on the spot. It can be provided in a system that incorporates a partial nozzle. Furthermore, in the case of this embodiment as well, the selection of double wing type or single wing type, the number of installations, combinations, etc. can be provided depending on the situation.

Next, using this fixing device, the replacement work of the sliding nozzle device to the bottom of the container will be explained based on the first embodiment.

A cassette support device 16 disposed directly below the sliding nozzle device 1 is raised, and its support arm 17 supports the sliding nozzle device 1 in a pushed up state. Next, an attachment/detachment machine (not shown) having a rotational force transmission mechanism that meshes with the teeth 5 of the rotating body 4 is installed.
to rotate the rotating body 4. As a result, the rotating body 4
The turnbuckle 6 rotates. The threaded rod 10 is
As the turnbuckle 6 rotates, the stopper 11 attached to its tip changes its rotation to forward and backward movement and retreats toward the rotary bearing block 7.
escapes from the horizontal hole 14 of the holding block 13.

When the stopper 11 has completely come out of the side hole 14, the cassette support device 16 is lowered and replaced with a new sliding nozzle device having a similar fixing device. This new sliding nozzle device is attached to the container bottom A by activating the fixing device 3 in the reverse order of removal, and the replacement work is completed.

At this time, the error in the amount of advancement of both the left and right stops 11 is:
The turnbuckle 6 itself is adjusted by sliding axially on a rotary bearing block 7.
In addition, since both stops 11 move back and forth by the rotation of the threaded rod 10 provided with a reverse groove, pressing force can be applied uniformly, and the sliding nozzle device 1 is pushed upward by the taper of the stops 11. The stopper 11 is held between the storage metal frame support block 12 and the holding block 13 while maintaining the closed state. Note that the rotational force transmission mechanism of the attachment/detachment machine that rotates the rotating body 4 is as follows.
The outer periphery of the turnbuckle 6 is not limited to the gear type, but may be of the friction rotation type by pressing. Furthermore, the outer periphery of the turnbuckle 6 is made polygonal and rotated with a spanner, or a crowbar is inserted into a hole provided on the outer periphery.
A manual method such as rotation can also be adopted.

The fixing position of the rotating bearing block 7 is the storage frame 2.
The metal frame portion of the surface that contacts the container bottom 3 may be fixed to a protruding flange, and the storage metal frame support block 12 may also be used with the flange portion reinforced. Further, the storage metal frame support block 12 may be provided with an opening through which the holding block 13 is inserted, instead of the notch shown in FIGS. 1 and 2.

[Effect of idea]

As explained above, when using the fixing device of the present invention, the stopper is always pressed against the holding block by the threaded rod, so that it will not fall off due to vibrations of the sliding nozzle device or the like. Also,
When a threaded rod with a reverse groove is used, the stopper can be pressed with a uniform pressing force, which improves the stability of fixing the sliding nozzle device attached to the bottom of the container. In this way, by incorporating a stopper for attaching and detaching a cassette-type sliding nozzle device or a casting nozzle exchange device into the fixing device, the attachment and detachment work can be mechanized and automated, making work in high-temperature atmospheres less burdensome. It becomes something small. Also, bolt,
Work can be simplified because there is no need to manage individual small equipment such as stickters and wedges.

[Brief explanation of drawings]

Fig. 1 is a side view showing the fixing device installed on the outer wall of the storage frame of the sliding nozzle device fixedly attached to the bottom of the container, and Fig. 2 is a plan view of the device as seen from below. FIG. 3 is a partial cross-sectional view of the rotating body and rotating bearing block in the fixing device. FIG. 4 is a single-wing schematic diagram of the fixing device, and FIG. 5 is a side view of the fixing device installed in the casting nozzle exchange device. DESCRIPTION OF SYMBOLS 1... Sliding nozzle device, 2... Storage metal frame, 3... Fixing device, 4... Rotating body, 5... Teeth, 6-1... Feed screw, 7... Rotating bearing block, 8... ... Fixed gold frame, 9 ... Oiles metal, 1
0... Threaded rod, 11... Stop, 12... Storage frame support block, 13... Holding block, 14...
Side hole, 15...Cassette positioning block, 16
...Cassette support device, 17...Support arm, 18
... stop plate, 19 ... flange section, 20 ... casting nozzle exchange device, 21 ... casting nozzle, 22 ...
...Lower nozzle, A...Bottom of the container, B...Sliding plate moving direction.

Claims (1)

[Scope of utility model registration request] A rotating body 4 is provided on the outer side of a housing frame 2 that houses a structure having a molten metal flow hole, and rotary bearing blocks 7 that rotatably support the rotating body 4 are provided on both left and right sides of the rotating body 4. The screw provided in the screw rod 10 is screwed together with the screw of the threaded rod 10 by a feed screw mechanism, a stopper 11 is fixed to the tip of the threaded rod 10, and the storage metal frame is fixed at the position where the stopper 11 contacts. Storage frame support block 1 fixed to 2
1. A fixing device for a structure having molten metal flow holes, characterized in that: 2 is provided.