JPS6068144A - Nozzle exchanger for continuous casting plant - Google Patents

Abstract

PURPOSE:To exchange quickly and exactly an immersion nozzle by performing mechanically removal of the old nozzle and transfer of the new nozzle to an attaching position and to position automatically the nozzle in the stage of attaching the same. CONSTITUTION:A carriage 17 having a base plate 16 is connected to a tundish car 12 carrying a tundish 1 and moves. The plate 16 supports freely horizontally turnably an arm 18 around the center CT of the tundish and supports horizontally movably said arm to a prescribed extent. The top end of the arm advances or retreats as the arm extends or contracts and a hand 20 is mounted to the top end in a way as to move vertically and laterally. A pair of forked hangers 21A, 21B for receiving and transferring old and new immersion nozzles 7A, 7B are juxtaposed to the top end of the hand 20. A pair of guide pins 22A, 22B are provided to the hand 20 and are fitted to the tundish shell or the positioning guides of a sliding nozzle device so that the nozzle is automatically centered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle changing device that is used by being attached to and detached from a sliding nozzle device that opens and closes the bottom opening of a tundish in continuous casting equipment.

Figures 1 and 2 show one example of this type of sliding nozzle device.
As an example, a tundish 1 has a refractory lining 3 on the inner surface of an iron skin 2 to receive molten steel 4, and a bottom opening 5 on the lower surface of which is moved horizontally by the operation of a cylinder (not shown). A refractory sliding nozzle 6 having an opening that matches the opening is provided, and a relatively long refractory submerged nozzle 7 extending downward is attached to the sliding nozzle 6. The immersed nozzle 7 receives the pins 11 on both sides of the support fitting 10 of the immersed nozzle 7 by a nozzle hanger 9 which is raised and lowered by the rotation of the bayonet 8 mechanism attached to the sliding nozzle 6, and can be attached to the sliding nozzle 6 by rising and removed by descending. shall be.

The immersion nozzle 7 is used to prevent the molten steel flow from being exposed and oxidized during casting, and is used to prevent oxidation of the molten steel flow during casting.
(See Fig. 4) Lower the tundish 1 from above, and as shown in Fig. 1, insert the lower end of the immersion nozzle 7 into the mold 1.
4 in 81114 in 3? It is used with f1. The powder 15 charged into the mold 13 prevents the surface of the molten steel 14 from being oxidized.

Since the immersion nozzle is immersed in high-temperature molten steel, it is easily damaged and requires frequent replacement. However, the position of the sliding nozzle 6 to which the immersion nozzle 7 is attached is not fixed at the site of continuous casting work.

For example, in a continuous casting machine with variable casting thickness, the mold 13
As shown in FIG. 3, due to rearrangement, the back lines are the same and the thickness is 1. The immersion nozzle 7 changes from position 7' to 7' (L
The settings are changed by moving a distance of "-L')/2. Also, as the tundish 1 deforms vertically and horizontally due to high heat, the position of the slide-in nozzle 6 also deforms and changes accordingly. If the ?I?M nozzle 7 is attached to the sliding nozzle 6 whose position is not specified.

Conventionally, a transporter was used and the operator transported the equipment.

Positioning and installation work is underway. Since the immersion nozzle must be preheated before installation, this operation requires labor, skill, and time. (Tokuko Showa 57-4
4429. Jitsukō 57-4259L Jitsukō 58-660
The present invention has been made with the aim of providing a rational solution to the aforementioned troublesome problems associated with the replacement work of a series of immersion nozzles. It is possible to mechanically remove and heat the new immersion nozzle and move it to the vicinity of the installation location, and then install it on the nozzle hanger on the sliding crizzle side.
By aligning the position by self-centering, quick and accurate removal is possible. That is, the configuration of the immersion nozzle exchange device for continuous casting equipment according to the present invention is as follows.

The base end of the arm is rotatably and vertically supported on the base, and the arm is extendable and retractable so as to position the delivery nozzle hanger near the kundish to replace the immersion nozzle that is attached to and detached from the sliding nozzle device of continuous casting equipment. A fork-shaped delivery nozzle hanger is attached to the tip of the arm, and the delivery nozzle hanger has a motor that engages with and detaches the immersion nozzle and is fixed to the tandish shell or sliding nozzle device. It is characterized by being equipped with a guide bin that fits into the positioning guide.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings to clarify its characteristics.

FIG. 4 is a plan view of the entire submerged nozzle exchange device according to an embodiment of the present invention, and FIG. 5 is a side view thereof.

The detailed structure of each part will be supplementarily explained with reference to Fig. 6.9.1' (1) in connection with the explanation of the operation in Figs. 7 and 8.

A truck 17 having a base 16 of the device according to the present invention is connected to a tanditush car 12 on which Kunditsh I is mounted, and serves as a driven truck which is towed by the truck and moves by UL running. The relative position between the base 16 and the tundish 1 can be adjusted by expanding and contracting the connecting portion 17' of the truck 17. However, the trolley I7 may be of a self-propelled type instead of a driven type, so that the relative position between the base 16 and the tundish I can be determined by self-propelled movement.

An arm 1B is supported on the base 16 at a position near the tandish center line CT so that the arm 1B can be rotated horizontally at its base end along a vertical axis, and can also be moved up and down. Furthermore, the lateral movement mechanism 1 of the pivot portion shown by the dotted line in Fig. 7(C)
9 supports it so that it can be moved laterally by a predetermined amount. The arm 18 is constructed in a telescopic manner, and its tip moves forward and backward as it expands and contracts. A hand 2o, which is an arm tip member, is attached to the tip of the arm 1B so as to be able to move freely vertically and horizontally within a predetermined range with respect to the arm axis. The details of the connection 31 M between the arm I8 and the hand 2o will be described later. At the tip of the hand 20 at the tip of the arm, a pair of fork-shaped delivery nozzle hangers 21A for the new immersion nozzle and a delivery nozzle hanger 218 for the old immersion nozzle 7B are arranged side by side. These delivery nozzle hangers 21
A21B is positioned near the sliding nozzle 6 by the mechanism, and then the submerged nozzle 78.

The pins 11 on both sides of the support fitting 10 of 7B are engaged from below to support each submerged nozzle.

The hand 20 is provided with a pair of center guide pins 22A, 22B at the center of each delivery nozzle hanger, corresponding to the delivery hangers 21A, 21B, and these guide pins 22A, 22B, as shown in FIG. Tanditshu iron skin 2 at the center line CT position
Alternatively, the hand 20 is fitted into a positioning guide 23 fixed to the sliding nozzle device in the process of advancing, so that centering is automatically performed. As mentioned above, the hand 20 is attached to the tip of the arm I8 so as to be movable vertically and horizontally, and the guide bin 22A of the hand 20,
Guide hole 23 of positioning guide 23 that receives 22B
゛ Ha.

As shown in FIG. 9, since the introduction part 23' has a large slope on the lower side, the hand 2o tends to float during fitting, and is accurately centered without being constrained. hand 2
0 has a downward concave guide 24 as shown in FIGS. 10(a) and 10(b), and sits on the roller 25 at the tip of the arm 18 with this guide 24, so it floats away from the centered state. if.

When the hand 20 descends, it is automatically centered and returned to the original central position at the tip of the arm.

The hand 20 is equipped with a pair of torque motors 26A and 26B that engage and rotate a bayonet 8 mechanism attached to the sliding nozzle 6 to attach and detach the immersion nozzle 7. As shown in FIGS. 4 and 6, on the base 16, there is a delivery hanger 21A at a position where the arm 18 is horizontally rotated 90 degrees from the position facing the tundish 1.
A receiving hanger 288 attached to the nozzle heater 27 that heats the new immersion nozzle 78 and a receiving hanger 28B that temporarily places the 1-day immersion nozzle 7B are located at a position opposite to 2LB.
will be established. These receiving hangers 28A and 28B are
It is raised and lowered by a cylinder 29, which is typically shown by a dotted line in FIG.

FIGS. 7(A) to 7(H) show a series of processes for replacing a submerged nozzle using the apparatus of the present invention in an operating sequence starting from a certain stage.

FIG. 7(a) shows a state in which the delivery nozzle hanger 2], B is positioned to directly face the old immersion nozzle 7B in order to remove it. The new immersion nozzle 7A, which has already been heated, is supported in a suspended state on the adjacent delivery nozzle hanger 218. As shown in FIG. 7(b), the arm 18
is extended to advance the arm tip hand 20, the guide bin 22B is fitted into the positioning guide 23 for centering, the torque motor 26B is engaged with the bayonet 8 and activated, and the old immersion nozzle 7B is lowered. Instead of the nozzle hanger 9, it is supported by a delivery nozzle hanger 21B.

FIG. 7(c) shows a state in which the arm 18 is then retracted and the hunt 20 is retreated.

Next, as shown in FIG. 7(d), the lateral movement mechanism 19 moves the arm 18. The hand 20 is moved laterally to move and position the delivery nozzle hanger 21A of the first new immersion nozzle 7A to a position directly facing the sliding nozzle device.

As shown in FIG. 7(E), by extending the arm 18, the guide pin 228 is inserted into the positioning guide 23 for centering, so that the new immersion nozzle 7A is at the mounting position, and the torque motor 26Δ is activated. Bayonet 8. It is attached to the sliding nozzle (6) via the nozzle hanger 9.

FIG. 7(f) shows the state in which the arm 18 is then retracted.

Subsequently, as shown in FIG. 7(g), the old submerged nozzle 7B supported by the delivery nozzle hanger 21B is temporarily returned to the position facing the sliding nozzle device by the lateral movement device 19.

Next, as shown in FIG. 7(H), the hand 20 is moved to a position facing the nozzle heater 27° receiving hangers 28A and 28B by rotating the 7-mm 18 by 90 degrees.

The arm 18 is extended, the receiving hanger 28B is raised to support the old immersion nozzle 7B in place of the delivery nozzle hanger 21B, the arm 18 is retracted, and the receiving hanger 28
B is lowered and temporarily placed until the old immersion nozzle 7B cools down, and then carried away.

FIG. 8 shows a state in which the new immersion nozzle 7 receives the new immersion nozzle, and the new immersion nozzle is heated by the nozzle heater 27. ＋? M nozzle 7
The receiving hanger 288 is raised by the cylinder 29, and after the arm 18 is extended, the receiving hanger 288 is lowered and the delivery nozzle hanger 2 is used instead of the receiving hanger 28A.
Supported by 1A. The arm 18 is contracted and rotated 90 degrees in the opposite direction to bring it to the position shown in FIG. 7(a).

It goes without saying that the present invention is not limited to the above-mentioned embodiments, but can be implemented by making various modifications to each part depending on the continuous casting machine type and sliding nozzle structure.

As described above, according to the present invention, the main work of replacing the immersion nozzle of continuous casting equipment in a high-temperature environment can be performed mechanically and automatically using a device with a relatively simple configuration, and remote control is possible. possible, and the number of required personnel can be reduced. 2nd function - H. Transporting the immersion nozzle to the mounting position of the sliding nozzle in response to changes in the settings of the continuous casting equipment and immediate response to deformation of the tundish.

Alignment and centering are done automatically, so there is flexibility for changes in position.Furthermore, when installing and removing the immersion nozzle, the relative position between the two is always the same, so 3) It is smooth and quick, with less heat loss in a short time. This has the advantage of allowing accurate exchange.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the sliding nozzle portion of the tanditshu, Fig. 2 is a longitudinal sectional side view thereof, Fig. 3 is a plan view showing the positional relationship between the mold and the nozzle as the slab thickness changes, and Fig. 4 is A plan view of an apparatus according to an embodiment of the present invention, and FIG. 5 is a side view thereof. FIG. 6 is a perspective view of the nozzle heater portion, and FIG. 7(A) is a schematic plan view immediately before the start of removing the old nozzle. Figure 7 (B) is a schematic plan view during removal, Figure 7 (C)
Figure 7(d) is a schematic plan view of the removed old nozzle held and moved back, Figure 7(d) is a schematic plan view of the new nozzle removed and moved to its previous position, and Figure 7(e) is a schematic plan view of the new nozzle being moved to its previous position. A schematic plan view, Fig. 7 (f) is a schematic plan view of the state in which the installation is later retracted, Fig. 7
Figure (g) is a schematic plan view of the hand moved laterally in order to start arm rotation, Figure 7 (g) is a schematic plane view showing the relationship with the nozzle heater after arm rotation, and Figure 8 is a schematic plan view of the nozzle heater portion. FIG. 9 is a schematic side view of the guide bin just before it is inserted into the positioning guide, FIG. 10(a) is a schematic side view of the hand portion at the end of the arm, and FIG. 10(b) is a front view of the guide portion. 1...Tandish, 2...Iron shell, 3...Refractory lining, 4... Molten steel, 5... Bottom distance 0.6.
...Sliding nozzle, 7...Immersion nozzle, 7A
-・New immersion nozzle, 7B... Old immersion nozzle, 8...
・Bayonet, 9... Nozzle hanger, 10... Support metal fittings, 11... Bin, 12... Tanditsuka, 13. 13', 13"... Molded, 14.
... Molten steel, 15... Powder, 16... Base, 17
...Base ratio, 17"...Connection part, 18...Arm. 19...Lateral movement mechanism, 20...Hand, 21A
, 21B...Delivery nozzle hanger, 22A,
22B...Guide pin. 23...Positioning guide, 23゛...Guide hole,
23"...Introduction part, 24...Guide, 25...Roller, 26A, 26B...Torque motor, 27
... Nozzle heater, 28A, 28[1... Reception hanger, 29... Cylinder. CT...Tanditshu center line, L', L"・
... Thickness of slab. (A) (C) 6 Figure 7 (Futatate 7 (G) (4-) 8A

Claims (2)

[Claims] (1) In a nozzle changing device attached to a sliding nozzle device of continuous casting equipment, the base end of a telescoping arm is rotatably and vertically supported on a base provided near the tundish, and the telescoping arm Continuous casting equipment, characterized in that it is equipped with a motor for attaching and detaching a nozzle at the tip thereof and a delivery hanger, and the delivery hanger is provided with a guide bin that fits into a positioning guide fixed to a tundish iron shell or a sliding nozzle device. nozzle exchange device. (2) The nozzle changing device for continuous casting equipment according to claim 1, wherein the base is a truck pulled by a kunditsuka or a self-propelled truck.