JPH05283Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an immersion nozzle changing device connected to a sliding nozzle device attached to the bottom opening of a tundish in continuous casting equipment.

(Prior art) A sliding nozzle is attached to the lower surface of the bottom opening of a tundish of continuous casting equipment, and an immersion nozzle is attached below the nozzle to guide the molten steel flowing out from the nozzle into the mold while blocking it from the atmosphere. .

This immersion nozzle is easily damaged because it comes into contact with high-temperature molten steel, and requires frequent replacement.

FIG. 1 is a perspective view of the main parts of the submerged nozzle exchange device.

In the figure, reference numeral 1 denotes a base connected to a tan dish car (not shown) at its base, and moves integrally with the tan dish car.

Reference numeral 2 denotes a carriage attached to the side surface of the base 1, which is connected to a cylinder 3 and reciprocates along a guide rail 4.

Reference numeral 5 denotes an arm that is horizontally rotatably supported on the carriage 2 by a support shaft 6, and the rotation of the arm 5 is controlled by a guide member having the tip of a lever 7 protruding from the support shaft 6 fixed on the base 1. 8 in the guide groove 8a,
It rotates approximately 90 degrees in conjunction with the movement of the carriage 2.

9 is a hand part arranged at the tip of arm 5,
This hand portion 9 has a guide 10 provided on the arm 5.
A sliding member 11 is provided to be movable along the sliding nozzle, a hanger 13 is provided to protrude in front of the sliding member 11 and holds the immersed nozzle 12, and means 1 for attaching and detaching the immersed nozzle 12 to the sliding nozzle.
4, and a guide pin 15 that fits into a positioning guide provided on the tundish side.

However, in the nozzle exchange device configured as described above, the arm is configured to be horizontally rotatable with respect to the base that moves together with the tundish car, and the arm is held to the side of the base in the standby position, and when the nozzle is replaced. The nozzle exchanging device protrudes at a working position approximately perpendicular to the base, and does not interfere with casting work when the nozzle changing device is in the standby position.
The device is extremely simple.

(Problem to be solved by the invention) By the way, in the hand part of the above-mentioned immersion nozzle exchange device, the immersion nozzle is held by a hanger that projects forward from a sliding member that is movably provided with respect to the arm. Moreover, when replacing the immersion nozzle, the immersion nozzle held on the hanger is handled at high temperature (1000℃), so the hanger and related parts that come into direct contact with the high temperature immersion nozzle are It is easy to cause thermal deformation, and due to the load applied to the hanger, the base of the hanger is constantly subjected to overturning moment, which tends to cause downward deformation over time.Due to these deformations, the tundish can be damaged when replacing the immersion nozzle. There are problems such as the positioning guide provided on the side and the guide pin of the hand part not being able to fit together, or even if they do fit, the immersion nozzle may be misaligned with respect to the sliding nozzle, causing problems in nozzle replacement work. be.

This invention was developed in view of the above points, and the purpose is to provide a submerged nozzle replacement device that can adjust the variation in mechanical accuracy due to deformation of the device and does not deteriorate workability even after long-term use. shall be.

(Means for Solving the Problems) The gist of this invention to achieve the above object is that an arm is mounted horizontally rotatably on a base that is movable together with the tundish car. In the immersion nozzle changing device, the immersion nozzle exchange device is equipped with a hand portion having a hanger for holding the immersion nozzle at the tip thereof, and moves the hand portion to a predetermined position near the sliding nozzle by rotating the arm. Freely install sliding members,
The upper part of the frame with the hanger attached to the sliding member is pivotably mounted, an arc-shaped mounting seat plate is provided at the lower part of the frame, the mounting seat plate is connected to the holding arm, and the holding arm is connected to the sliding member. A submerged nozzle exchange device characterized in that a tip is engaged with an arm so as to be movable together with a frame.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

Figure 2 is a perspective view of the hand part in this invention.
Figure 3 is a vertical sectional view of the main part, Figure 4 is A-A in Figure 3.
It is a sectional view taken along the A line.

In this invention, in the apparatus shown in FIG. 1, the hand section disposed on the arm is constructed as follows.

Note that parts common or equivalent to those in FIG. 1 are given the same reference numerals.

That is, the hanger 1 is moved relative to a sliding member 11 provided movably along a guide 10 on the arm 5.
The upper part of the frame 16 to which the bracket 13 is attached is attached to the bracket 1.
7 and pivotally connected to the frame 16 by a pivot 18.
A mounting plate 19 is provided at the bottom of the mounting plate 1
The frame 16 is connected to the base of a holding arm 21 by a fixing bolt 22 through a long hole 20 drilled in the mounting base plate 19 so that the swing of the frame 16 can be adjusted. The tip 21a of the holding arm 21 is fitted into a sliding groove 23 formed on the underside of the arm 5.
The movable member 14 is engaged with the frame 16 so as to be movable integrally with the frame 16.

The joint surface between the mounting seat plate 19 and the holding arm 21 is formed into a circular arc surface centered on the pivot 18, and a bent edge 19a is provided at the tip of the mounting seat plate 19. An adjusting screw 24 screwed into the holding arm is brought into contact with the end face of the holding arm to restrict the range of swing of the frame portion relative to the sliding member 11.

In the above configuration, with the guide pin of the hand part fitted into the positioning guide provided on the tundish side, loosen the fixing bolt 22 and make fine adjustments with the adjustment screw 24, while adjusting the position of the immersion nozzle 12 relative to the sliding nozzle. Adjust the position to the normal position and tighten the fixing bolt 22.

When the immersion nozzle 12 becomes misaligned with respect to the sliding nozzle over time during the immersion nozzle replacement work (deformation of parts and inclination of the frame part), the fixing bolt 22 and adjustment screw 24 Readjust according to the instructions.

(Effects) As is clear from the above description, in the submerged nozzle exchanging device of this invention, the upper part of the frame to which the hanger for holding the submerged nozzle is attached is pivotally attached so as to be swingable to a sliding member movably provided on an arm extending from a base, a holding arm is connected to the lower part of the frame so as to be capable of adjusting the swinging of the frame, and a tip of this holding arm is engaged with the arm so as to be movable integrally with the frame,
Since the oscillation of the frame is adjusted to align the submerged nozzle with respect to the sliding nozzle, even if the position of the submerged nozzle with respect to the sliding nozzle becomes misaligned due to deformation of parts caused by high heat over time during the work of replacing the submerged nozzle, the misalignment can be easily restored by adjusting the fixing bolts and adjusting screws, and the work of replacing the submerged nozzle can always be performed smoothly. Furthermore, since each component part can be used even if it is slightly deformed, the frequency of replacement with new parts can be reduced. Moreover, even if the precision of these parts can be reduced, the processing costs can be reduced, making it economical. Furthermore, since the work of adjusting the misalignment does not require major disassembly and assembly of the device, it can be performed quickly, and maintenance and servicing costs are reduced. These and other practical effects are great.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the main parts of the immersion nozzle exchange device;
FIG. 2 is a perspective view of the hand portion in this invention, FIG. 3 is a longitudinal sectional view of the main part, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 1... Base, 2... Carriage, 3... Cylinder, 4... Guide rail, 5... Arm, 6...
Support shaft, 7... Lever, 8... Guide body, 9... Hand portion, 10... Guide, 11... Sliding member, 12
... Immersion nozzle, 13 ... Hanger, 14 ... Detachment means, 15 ... Guide pin, 16 ... Frame, 17 ... Bracket, 18 ... Pivot, 19 ...
...Mounting seat plate, 20...Long hole, 21...Holding arm, 2
2...fixing bolt, 23...sliding groove, 24...adjusting screw.

Claims (1)

[Scope of utility model registration request] An arm is attached horizontally to a base that is movable together with the tundish car, and a hand section equipped with a hanger for holding the immersion nozzle is installed at the tip of the arm. In the immersion nozzle changing device for moving the hand part to a predetermined position near the sliding nozzle, the arm is provided with a movably sliding member, and the upper part of the frame to which the hanger is attached to the sliding member is pivotably pivoted. An arc-shaped mounting seat plate is provided at the lower part of the frame, the mounting seat plate is coupled to a holding arm, and the tip of the holding arm is engaged with the arm so as to be movable together with the frame. Immersion nozzle exchange device.