JPS6350101B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for replacing an immersion nozzle that is attached to and detached from a sliding nozzle device for opening and closing the bottom opening of a tundish in continuous casting equipment, and to the device. .

(Prior art) The tandy tank mounted on the tandy car in continuous casting equipment is configured to receive molten steel by applying a refractory lining to the inner surface of the steel shell, and to prevent the molten steel from flowing out from the bottom. A sliding nozzle device is often installed on the bottom surface of the opening to which a submerged nozzle is attached which moves horizontally to open and close the opening and to supply molten steel to the mold.

The immersion nozzle is used to prevent the molten steel flow from being exposed to the air and oxidizing during casting.
Since the tundish is lowered together with the tundish on the tundish car and its lower end is immersed in the molten steel in the mold, it is easily damaged and requires frequent replacement.

(Problem to be Solved by the Invention) By the way, in equipment where the casting thickness can be changed, the mold is reassembled according to the thickness of the slab based on its back line. Naturally, as the thickness changes, the position of the immersion nozzle relative to the mold also needs to change.

Furthermore, although the tandy cylinder is mounted in a fixed position on the tandy cylinder, it may be deformed due to high heat, and the position of the sliding nozzle device may change accordingly.

Therefore, the position of the sliding nozzle device at the bottom of the tundish where the immersion nozzle is attached is not necessarily fixed at the work site, and conventionally, in order to attach the immersion nozzle to this sliding nozzle device, the operator generally Currently, a series of operations from attaching the nozzle to the nozzle device to positioning it to fit the mold are performed using input.

Therefore, this work is extremely troublesome in a high-temperature environment, requires labor and skill from the workers, and takes a long time.

(Means for Solving the Problems) The purpose of the present invention is to completely automate the above-mentioned series of immersion nozzle replacement operations, and to provide a rational solution to the problems associated with the troublesome immersion nozzle replacement. The gist of the present invention is that when a submerged nozzle is attached to a sliding nozzle device provided at the bottom of a tundish car of continuous casting equipment, a nozzle changing device attached to a tundish car is used. The hand section that holds the immersion nozzle detects the amount of movement in the mold thickness direction and the mold width direction when the nozzle is attached to the sliding nozzle device, and moves the tundish based on the detected data to attach it to the mold. A nozzle replacement method for continuous casting equipment, which is characterized by aligning the immersion nozzle to a suitable position, and a hand part for holding the immersion nozzle in the tundish car to properly carry out this method. A nozzle exchange device is attached thereto, the nozzle exchange device having a nozzle for detecting the amount of movement of the hand portion in the mold thickness direction and the mold width direction when the nozzle is attached to the sliding nozzle device at the bottom of the tundish. A position detector is attached, and these operate based on the output from the nozzle position detector to move the tundish in the mold thickness direction.
Further, there is provided a nozzle changing device for continuous casting equipment, characterized in that a tundish moving device for each adjustment movement in the width direction is provided on the tundish car.

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

FIG. 1 is a plan view of the device of the present invention, and FIG. 2 is a side view of the same.

In the figure, reference numeral 1 denotes a tundish car on which a tundish dish 2 is mounted, and this tundish car 1 includes an actuator 3 for lateral movement, a tundish lateral movement position detector 4, and an actuator for vertical fine adjustment of the tundish dish. 5 and a tundish vertical movement position detector 6.

7 is a trolley extended from tandate shuttle car 1,
Reference numeral 8 denotes a nozzle changing device installed on this cart 7, which includes a carriage 9 arranged to be horizontally movable in the direction of movement of the tundish car 1, that is, the mold width direction, and an actuator 10 for lateral movement of this carriage 9. , a nozzle lateral movement position detector 11 that detects the nozzle position from the movement of the carriage 9, and a nozzle lateral movement position detector 11 that is disposed on an arm 12 protruding from the carriage 9 in the vertical direction perpendicular to the movement direction of the carriage 9, that is, the mold thickness direction. Immersion nozzle 1
3, a nozzle vertical movement position detector 15 that detects the nozzle position from the movement of the hand 14, and a sliding nozzle device 1 provided in the hand 14 and provided at the bottom of the tundish 2.
The guide pin 18 for positioning is fitted into and removed from the guide portion 17 of No. 6.

At the tip of the hand 14, a pair of fork-shaped nozzle hangers 19 for transferring the immersion nozzles 13 are formed, which are located in the vicinity of the tundish center line CT and connected to the sliding nozzle device at the bottom of the tundish. The guide pin 18 provided on the hand 14 when installing the nozzle is directed toward the sliding nozzle device 16.
The immersion nozzle 13 automatically connects to the sliding nozzle device 16 in the process of fitting into the guide portion 17 of the
are aligned.

Figure 4 is a sectional view of the main part of this misalignment adjustment part, and Figure 5
The figure is an explanatory diagram of misalignment adjustment.

Therefore, the adjustment amount l of the misalignment between the guide portion 17 and the guide pin 18 of the sliding nozzle device 16 is as follows.
Deformation of the tundish tray 2, misalignment when setting the tundish tray 2 to the tundish car 1,
Needless to say, this amount is larger than the amount of misalignment between the mold A and the sliding nozzle device 16 due to the misalignment of the mold center line due to the change in the thickness of the mold A.

The configuration of the sliding nozzle device 16 and the procedure for attaching the immersion nozzle 13 held by the hanger 14 to the sliding nozzle device 16 are both based on conventionally known techniques (for example, Japanese patent application No.
58-175909), the details of which will be omitted.

(Function) In the above configuration, the function of the present invention will be explained next with reference to FIG. 3.

The nozzle hanger 19 of the nozzle exchange device 8 includes:
Sliding nozzle device 1 of tundish 2
6, the hand 14 is moved from the outside of the tundish by operating the actuator 10 for horizontal movement of the carriage while holding the submerged nozzle 13.
is moved toward the sliding nozzle device 16. The hand 14 is the sliding nozzle device 1
6 and in the process in which the guide pin 18 of the hand 14 fits into the guide portion 17 of the sliding nozzle device 16, the movement of the carriage 9 is detected by the nozzle lateral movement position detector 11, and the nozzle position data is detected. At the same time, the nozzle vertical movement position detector 15 detects the movement of the hand 14 in the mold thickness direction, and outputs the nozzle position data X1 and inputs it to the calculator 20. .

Nozzle normal position data X0, Y0 calculated from the mold thickness and mold width are input into the calculator 20 in advance by the operator via the setting device 21, and the calculator 20 inputs the above data X1, Y1. When there is an input, the nozzle vertical movement amount X1-X0 and the nozzle lateral movement amount Y1-
Y0 is calculated and inputted to the calculation units 20a and 20b.

Based on this input, the computing unit 20a instructs the amount of vertical movement of the tundish 2, and the tundish longitudinal fine adjustment actuator 5 is operated via the amplifier 22 to finely adjust the vertical movement of the tundish 2.

This movement is detected by the longitudinal movement position detector 6.
is detected, and the actual vertical movement amount data X2 is output and fed back to the arithmetic unit 20a.

Then, in the calculator 20a, a comparison is made again with the previous nozzle vertical movement amount X1-X0, and
- The vertical movement of the tundish 2 is finely adjusted by the operation of the tundish longitudinal fine adjustment actuator 5 until X0=X2.

On the other hand, the amount of lateral movement of the tundish 2 is instructed from the arithmetic unit 20b, and the tundish lateral movement actuator 3 is operated via the amplifier 23 to adjust the lateral movement of the tundish 2.

This movement is detected by the lateral movement position detector 4.
is detected, the actual lateral movement amount data Y2 is output and fed back to the arithmetic unit 20b, and the arithmetic unit 20b again calculates the previous nozzle lateral movement amount Y1-
A comparison is made with Y0, and the lateral movement of the tundish 2 is adjusted by the operation of the tundish lateral movement actuator 3 until Y1-Y0=Y2.

In this way, the immersion nozzle 13 is finely moved together with the tundish 2 to the normal nozzle position that is suited to the mold thickness and mold width, and the positioning adjustment is completed.

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 type of continuous casting equipment, the structure of the sliding nozzle device, etc. do not have.

(Effects) As explained above, according to the present invention, the immersion nozzle can be adjusted to the sliding nozzle device at the bottom of the tundish in response to changes in the settings of continuous casting equipment (for example, changes in mold thickness) and deformation of the tundish. A series of operations such as transportation, installation, and positioning of the nozzle to match the mold are all performed mechanically and automatically without relying on the operator's intuition or experience, making it easier to replace the immersion nozzle. It can be carried out smoothly and quickly in a short period of time, and the work can be remotely controlled using a device with a relatively simple configuration, freeing workers from the main task of replacing submerged nozzles in a high-temperature environment. In addition, by comparing the position of the actuator for fine adjustment of the tundish and the actual measured position of the nozzle in the vertical direction, it is also possible to measure the deformation of the tundish in the vertical direction, and it is also possible to automate the deformation management of the tundish. It has the following effects.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is a side view of the same, Fig. 3 is an explanatory diagram of the operation, Fig. 4 is a sectional view of main parts of the misalignment adjustment section, and Fig. 5 is an explanation of misalignment adjustment. It is a diagram. be. DESCRIPTION OF SYMBOLS 1... Tundishishu car, 2... Tundishishi, 3... Tundishishi lateral movement actuator, 4... Tundishishi lateral movement position detector, 5...
Actuator for longitudinal fine adjustment of tundish, 6
... Tanditetsu vertical movement position detector, 7... Trolley,
8... Nozzle exchange device, 9... Carriage, 10... Carriage lateral movement actuator, 11... Nozzle lateral movement position detector, 12... Arm, 13... Immersion nozzle, 14... Hand, 15... Nozzle vertical movement position detector, 16 ...Sliding nozzle device, 17...
Guide portion, 18... Guide pin, 19... Nozzle hanger, 20... Arithmetic unit, A... Mold.

Claims (1)

[Scope of Claims] 1. A mold of a hand portion that holds the immersion nozzle when the immersion nozzle is attached to a sliding nozzle device provided at the bottom of the tundish of continuous casting equipment using a nozzle changing device attached to the tundish car. Nozzle replacement for continuous casting equipment, characterized by detecting the amount of movement in the thickness direction and mold width direction, moving the tundish based on the detected data, and aligning the immersion nozzle to a position suitable for the mold. Method. 2. A nozzle changing device having a hand portion for holding the immersion nozzle is attached to the tundish car, and the nozzle changing device has a mold thickness when the hand portion is attached to the sliding nozzle device at the bottom of the tundish dish. A nozzle position detector is installed on the tundish car to detect the amount of movement in the width direction and the mold width direction, and the tundish car is activated based on the output from these nozzle position detectors to move the tundish in the mold thickness direction. , and a tundish moving device for each adjustment movement in the width direction.