JPS6171159A - Guide device for roller apron in continuous casting installation - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the guiding accuracy of a roller apron by providing a lever pinned to a mold side and roller apron side respectively. CONSTITUTION:A bracket 13 is integrally provided to a mold frame 1 and the bracket is integrally attached similarly to a roller apron frame 3 as well. Pins 12' and 12 are respectively inserted into the shaft holes of the brackets 13 and 14 and the frame 1 and the frame 3 are connected by a lever 11. More specifically, the lever 11 is pivotally supported at both ends thereof and therefore said lever can hold the roller apron in the horizontal home position without restraining the vertical oscillation of the mold. The pin parts are thoroughly hermetically sealed and therefore the high accuracy in the guide of the roller apron is maintained even after long-term use.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a guide device for a roller apron in continuous casting equipment.

More particularly, the present invention relates to a roller apron guide system for accurately positioning the roller apron relative to the mold and reliably maintaining their relative position in continuous casting equipment.

BACKGROUND OF THE INVENTION In continuous casting, it is extremely important that the mold and the rolls of the roller apron, which guide the slab drawn from the mold, are accurately aligned. In other words, if there is misalignment between the mold and the roller apron, a force that destroys the solidified shell will be applied to the slab, which is solidified only on the surface and molten inside, causing the slab to break out and cause serious damage. This is undesirable as there is a risk of an accident.

Accordingly, in the prior art, guiding means as shown schematically in the accompanying FIGS. 3 and 4 have been used.

FIG. 3 is a schematic diagram of a roller-apron guiding device of a continuous casting installation according to the prior art.

In the figure, reference number 1 indicates a mold frame, and a protrusion 2 is provided hanging downward from the right bottom part of the mold frame l. A roller apron frame 3 that accommodates a group of roller aprons is located below the mold 1. It is necessary to guide this roller apron frame 3 so that the roller surfaces of the roller apron are aligned with both sides of the slab pulled out from the mold.

For this reason, a guide roll frame 4 integrally joined to the roller apron frame 3 is used.

The guide roll frame 4 includes a pair of guide rolls 5.5' each supported by an eccentric pin 6.6'.

On the other hand, liners 7 are placed on both sides of the protrusion 2 of the mold frame.
．． 7' is mounted on which the guide roll 5.5' slides on the liner 7.7'. Raina 7.
The distance between 7゛ is the bolt 9.9, which is biased by the spring 8.8゛.
In this way, the mold 1 is restrained in the horizontal direction by the guide rolls 5.5'' in a state where it can vibrate up and down, and the roller apron is thus positioned with respect to the mold 1.

FIG. 4 shows another example of a roller apron guiding device according to the prior art. This guide device is also integrally attached to the frame 3 of the roller apron, and a pair of guide rolls 5.5' are attached to the Takaido roll frame 4 facing each other. These guide rolls 5.5° slide on liners 7.7° attached to both sides of the protrusion 2 which hangs vertically from the bottom of the mold frame 1. In the guide device shown in FIG. 4, the distance between both surfaces of the liner 7.7'' is fixed, while one of the pair of guide rolls 5.5'', for example the guide roll 5'', is biased by a spring 8 to bolt the bolt. 9.9°
Its position is adjusted by

The roller apron (not shown) is aligned with the bottom opening of the mold by the guide device shown in FIGS. It is absorbed by sliding on .7'.

In principle, such a roller apron guide device has the function of accurately positioning the roller apron. Therefore, as long as neither the guide roll 5.5" nor the liner 7.7" wear out, they will guide the roller apron into position.

However, in the actual operation of continuous casting, the slab is forcedly cooled with water directly below the mold, resulting in a harsh environment where scale can fly off the slab surface. Furthermore, the oscillation of the mold causes the guide roll 5.5' to slide periodically over the liner 7.7°, and the mold is a heavy structure. Therefore, the guide roll 5.5' and the liner 7
．． 7° and the guide roll 5.
5" or the liner 7.7' is worn, the roller apron cannot be accurately positioned, and the mold and the roller apron become misaligned with an amplitude of about 0.1 to 0.2 mm during the casting operation.

In order to deal with the occurrence of such misalignment, in the conventional technology, it was necessary to adjust the position of the guide roll 5.5' using an eccentric pin 6.6° about once every two weeks. .

Problems to be Solved by the Invention An object of the present invention is to solve the problems of the prior art described above, and to accurately position a roller apron with respect to a mold.
It is an object of the present invention to provide a roller apron guide device for continuous casting equipment that does not become distorted even under adverse environments and is not subject to changes over time due to wear or the like.

Means for Solving the Problems In order to achieve the above object, according to the present invention, in continuous casting equipment, the mold side and the roller apron side are connected by a lever having both ends pin-joined to each other, and the lever Provided is a guide device for a roller apron in a continuous casting facility, characterized in that the roller apron is positioned relative to the mold by a length of .

The lever may connect the mold frame and the roller apron frame, or connect the bracket of the mold frame and the bracket of the roller apron frame.

Furthermore, the pin joint of the lever is preferably sealed and protected from the surrounding environment.

Function As described above, the guide device of the present invention connects the mold side and the roller apron side with a structurally resistant lever to align the position of the roller apron with respect to the mold. Therefore, the position of the roller apron group relative to the mold is determined by the length of the lever and remains unchanged, and the structure is not subject to changes over time due to wear or the like as in the prior art.

Furthermore, since both ends of the lever of the guide device of the present invention are connected by pins to the mold side and the roller apron side, it has a structure that can absorb mold oscillations, and the rollers due to the oscillations. The displacement on the apron side is within a range that does not interfere with actual operation.

Now, let S be the amplitude of the oscillation of the mold, and let δ be the relative displacement (max) between the mold side and the roller apron side.
If the distance between the pin-joined ends of the lever is l, then δ is expressed by the following equation.

For example, if 3=3mrn and β=1200mm,
δ=0.0267 mm, which is less than 1/7 of the actual operational limit of 0.2 mm, and can guarantee extremely high guidance accuracy.

Furthermore, the pin joint of the lever undergoes minute reciprocating motion;
By completely sealing this part, it is possible to prevent water and scale from entering from the surrounding area, and it can be used for a long period of time without maintenance.

EXAMPLES The present invention will now be described by way of examples with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a roller apron guiding device according to an embodiment of the present invention.

As shown in the figure, roller apron frames 3 and 3° each containing a roller apron are arranged below the mold of the continuous casting equipment. The roller apron guide device of the present invention is equipped with a lever 11 that connects the mold frame 1 and the roller apron frame 3, and both ends of the lever 110 are connected to the mold frame 1 side and the roller apron frame side by pins 12 and 12', respectively. It is joined. For this reason, an L-shaped bracket 13 is integrally attached to the mold frame 1.
A pin 12' is inserted through the shaft hole to pivotally support the lever 11. On the other hand, a bracket 14 is similarly integrally attached to the roller apron frame 3.
A pin 12 is inserted through the shaft hole to pivotally support the lever 11. That is, since the lever 11 is pivotally supported at both ends thereof, the roller apron can be held in a fixed position in the horizontal direction without restricting the vertical oscillation of the mold frame 1, that is, the mold.

FIG. 2 is a view of the guide device shown in FIG. 1 in the direction of arrows.

As mentioned above, the lever 11 is pivotally supported at both ends by the brackets 13, 14 via pins.

The gap between the pin 12.12' and the lever 11 has a small internal gap, high precision, and a large load capacity bearing 15.15.
゛ is incorporated.

Furthermore, the bearing 15.15° is equipped with a shaft shooter (not shown), which is protected from the surrounding environment.

FIG. 5 illustrates a second embodiment of the guide device of the invention.

In the guide device of the embodiment shown in FIG. 5, the mold frame 1 and the roller apron frame 3 are connected by a pair of levers 11, 11' arranged on both sides of the mold.

Each lever uS11' has a protrusion 2.2 that is integrally provided on both sides of the bottom of the mold frame 1 and hangs downward.
' and protrusions 16.16' integrally attached to both sides of the roller apron frame 3, with pins 12.1 at both ends.
2".

In the figure, reference number 17.17' indicates an oscillation belt that vibrates the mold vertically, 18.18" indicates a trunnion that drives the roller apron framer, and 19.1" indicates an oscillation belt that vibrates the mold vertically.
9' indicates a trunnion receiver.

Effects As explained above, the guide device according to the present invention is structured to accurately position the roller apron relative to the mold and to enable vertical oscillation of the mold while holding the roller apron in place. Since the mold side and the roller apron side are connected and positioned by a structurally resistant lever, the guiding accuracy does not deteriorate even when used for a long time in a bad environment, and maintenance is easy.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a roller apron guide device according to one embodiment of the present invention, FIG. 2 is a view of the lever shown in FIG. 1 in the direction of arrows, and FIG. 3 is a conventional roller apron guide 4 is a schematic diagram of a guiding device according to another example of the prior art; and FIG. 5 is a schematic diagram of a guiding device according to another embodiment of the present invention. (Main reference numbers) 1 Mold frame, 3 Roller apron frame, 4 Guide roll frame 9. 5.5' guide roll, 6.6° eccentric pin, 7
．． 7° liner, 11.11” lever, 12.
12° Pin, 13° Molded frame bracket, 14° Roller apron frame bracket, 15.15゛ Bearing, 16 Roller apron frame protrusion, 17.1
7″ Oscillation belt, patent applicant Sumitomo Heavy Industries Co., Ltd. sub-agent Patent attorney Senior Arai Figure 1 Figure 3

Claims (2)

[Claims] (1) In continuous casting equipment, the mold side and the roller apron side are connected by a lever whose both ends are connected with pins, and the roller apron is positioned relative to the mold by the length of the lever. A guide device for a roller apron in continuous casting equipment, characterized by: (2) A guide device for a roller apron in a continuous casting facility according to claim 1, wherein the pin joint portion of the lever is sealed.