JPH044948A - Method and device for jointing horizontal mold and tundish in horizontal continuous caster - Google Patents

Abstract

PURPOSE:To facilitate joint of a nozzle by shifting a horizontal mold toward a front nozzle in a tundish mounted on a stopped truck along the axial line and jointing end part at inlet side of the horizontal mold with end part at outlet side of the front nozzle. CONSTITUTION:The truck 9 mounted with the tundish 8 is shifted toward the end part at the inlet side of horizontal mold 2 arranged on a base table 1 and stopped at the prescribed position near the base table 1. Successively, by shifting the horizontal mold on the base table toward the end part at the inlet side of horizontal mold mounted on the stopped truck, the end part at the inlet side of horizontal mold is jointed with the end part at the outlet side of front nozzle 24 fitted to an opening hole in the tundish. Therefore, at the time of joining, breakage of the front nozzle and lining refractory in the tundish and the horizontal nozzle 12 and brake ring 25, etc., at the end parts of inlet side in the horizontal mold are not developed. Further, the joint of each in plural horizontal molds and each in plural front nozzles, can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for joining a horizontal mold and a tundish in a horizontal continuous casting machine for casting molten steel into cast steel pieces.

[Conventional technology]

Horizontal continuous casting machines are known for continuously casting molten steel into billets. In this machine, the molten steel led from the tundish is placed in a horizontal mold connected via a horizontal nozzle and a break ring to an opening provided in the lower side wall of the tundish containing the molten steel. in the horizontal direction through the horizontal mold by multiple cycles of two push-backs.
It is drawn intermittently and continuously into cast steel billets.

The horizontal nozzle and break ring are eroded during casting and must be replaced after every casting. In order to replace the horizontal nozzle and break ring, it is necessary to connect the horizontal mold and the dish so that they can be separated at any time.

Fig. 4 is a schematic side view showing a conventional horizontal mold and tundish joining device of a horizontal continuous casting machine that simultaneously casts molten steel into a plurality of slabs; Fig. 5 is a schematic plan view thereof; The figure is an enlarged schematic vertical cross-sectional view showing the joint portion between the horizontal mold and the tundish. As shown in FIGS. 4 to 6, a plurality of horizontal molds 2 are arranged parallel to each other on the same horizontal level at predetermined intervals on the base l. A horizontal nozzle 12 is attached to the entrance end of the horizontal mold 2 via a break ring 25. Each horizontal mold 2 is covered by a jacket 3. In the space formed between the horizontal mold 2 and the jacket 3, cooling water is circulated through a conduit 4.
Cool the horizontal mold 2. 6 is a horizontal guide roller for supporting and guiding the cast steel piece 5 pulled out from the horizontal mold 2; 7 is a spray chamber provided on the base 1 and covering a cooling mechanism for the cast steel piece 5.

The tundish 8 for receiving molten steel has a plurality of openings 23 in the lower part of its side wall, spaced apart from each other by the same distance as the plurality of horizontal molds 2, and on the same horizontal level. A front nozzle 24 made of refractory material is attached to each of the openings 23.

The tanditshu 8 is mounted on a trolley 9, and the trolley 9
The rail 10 laid toward the base 1 is
It is possible to move towards.

In such an apparatus, the horizontal mold 2 and the tundish 8 are joined as follows.

That is, the trolley 9 carrying the tundish 8 is moved toward the entry side end of the horizontal mold 2 of the base 1 by a drive mechanism (not shown). Then, at a position close to the base 1, the front nozzle 24 attached to the opening 23 of the tundish 8 is joined to the horizontal nozzle 12 provided at the entrance end of the horizontal mold 2 on the base 1. , adjust the movement of the trolley 9 by 1#.

In this way, when the front nozzle 24 attached to the opening of the tundish 8 is joined to the horizontal nozzle 12 provided at the entrance end of the horizontal mold 2, the carriage 9 is fixed at that position.

Thus, as shown in FIG. 6, the joining between the horizontal nozzle 12 at the entrance end of the horizontal mold 2 and the front nozzle 24 of the tundish 8 is completed. The molten steel led from the dumpster 8 into the horizontal mold 2 is passed through the horizontal mold 2 by at least one pair of pinch rolls (not shown) through multiple cycles each consisting of one pull and one push back. Through this, the cast steel billet 5 is drawn intermittently and continuously in the horizontal direction.

[Problem to be solved by the invention]

There are the following problems in joining the horizontal mold 2 and the tundish 8 using the conventional method described above.

(a) Due to the movement of the truck 9, the horizontal nozzle 12, the front nozzle 24, the break ring 25, and the refractory lining of the tundish 8 are often damaged by the tandy on the truck 9.

(b) To simultaneously cast molten steel into multiple pieces of cast steel,
When a plurality of horizontal molds 2 are installed on the base 1, the horizontal nozzles 12 of these plurality of horizontal molds 2
It is not easy to uniformly join the front nozzles 24 to each of the plurality of front nozzles 24 provided at the lower side wall of the tundish 8, and this joining requires a long time.

(c) As shown by the two-dot chain line in FIG.
a is easily deformed by the heat during casting. If such a deformation occurs in the outer part 8a of the tundish 8 facing the horizontal mold 2, it is particularly likely that a plurality of horizontal molds 2 are placed on the base 1 in order to simultaneously cast molten steel into a plurality of slabs.
is installed, the bonding with any one of the plurality of horizontal molds 2 becomes defective. As a result, a problem arises in which molten steel leaks from the portion where the joint with the horizontal mold 2 is defective.

Therefore, the object of the present invention is to provide a horizontal rapid reading casting machine with
The joint between the horizontal mold and the tundish can be made without causing damage to the front nozzle and lining refractory of the tundish, as well as the horizontal nozzle and break ring at the entrance end of the horizontal mold. When casting into a cast steel piece, each of the plurality of horizontal molds and each of the plurality of front nozzles provided at the lower part of the side wall of the tundish can be easily joined,
Another object of the present invention is to provide a method and apparatus for joining a horizontal mold and a tundish, which do not cause poor joining even when the outer side of the tundish facing the horizontal mold is deformed.

[Means to solve the problem]

The present inventors have conducted extensive research in order to solve the above-mentioned problems. As a result, if the horizontal mold is made movable along its axis, and the cart on which the tanditsh is mounted is moved so as to be joined to the tip of the horizontal mold, the horizontal mold and the tanditsh can be moved. It has been found that the horizontal nozzle, break ring, front nozzle, and refractory lining of the tundish can be reliably and easily joined without causing damage even when the outer part of the tundish is deformed.

This invention was made based on the above findings, and
In the method of moving a cart on which a tundish is mounted toward a horizontal mold provided on a base, and joining a front nozzle attached to an opening in a lower side wall of the tundish to a tip of the horizontal mold, A horizontal mold is movable on the base along its axis, movement of the carriage is stopped at a position proximate to the entry end of the horizontal mold, and then the horizontal mold is moved along its axis. moving along an axis toward the front nozzle of the tundish mounted on the stopped cart, and joining the inlet end of the horizontal mold to the outlet end of the front nozzle; It has characteristics.

[Effect]

According to this invention, the horizontal mold is mounted on the tundish, and then the horizontal mold on the base is moved toward the entry side end of the horizontal mold mounted on the stopped cart. The inlet end is joined to the outlet end of a front nozzle attached to the opening of the tundish.

Therefore, during joining, there will be no damage to the front nozzle and lining refractory of the tundish, as well as the horizontal nozzle and break ring at the entrance end of the horizontal mold. In the case of simultaneously casting molten steel into a plurality of pieces of cast steel, each of the plurality of horizontal molds and each of the plurality of front nozzles provided at the lower part of the side wall of the tundish can be easily joined, and, Even if the outer part of the tundish towards the horizontal mold is deformed, no joint failures will occur.

[Example] Next, the present invention will be described with reference to the drawings. 1st
The figure is a partially cross-sectional schematic side view showing one embodiment of the apparatus of the present invention, and FIG. 2 is a partially cross-sectional schematic plan view thereof. 1 and 2 show an apparatus for simultaneously casting molten steel into a plurality of cast steel pieces. Figures 1 and 2
As shown in the figure, the apparatus of the present invention includes a base 1 and a plurality of mold supports provided on the base 1 at predetermined intervals and movable horizontally in the same direction. Platform 11
, a horizontal mold 2 fixed on each of the plurality of mold supports 11 with its axis in the same direction as the moving direction of the mold supports 11, and a mold support provided on the base 1. toward the tip of the horizontal mold 2 on 11,
A cart 9 movably provided on a rail 10 and a cart 9
It consists of a tundish 8 which is mounted on the top and has a front nozzle 24 in each of a plurality of openings provided at the same horizontal level and at the same intervals as the horizontal mold 2 at the lower part of its side wall. .

Each of the mold support stands 11 includes a base plate 11a to which the horizontal mold 2 is fixed on the upper surface thereof, and a support frame 11 provided around the lower surface of the base plate 11a, the lower end of which abuts on the base 1.
It is formed into a box shape with an open bottom end.

The horizontal mold 2 is covered by a jacket 3, and in the space formed between the horizontal mold 2 and the jacket 3, cooling water is circulated through a conduit 4 to cool the horizontal mold 2. On the base plate 11a of the mold support 11, there is further provided a guide roller 6 for supporting and guiding the cast steel strip 5 pulled out from the horizontal mold 2, and a cast steel strip 5 covered with a pre-chamber 7. A cooling mechanism is provided.

A first guide plate 13 having a predetermined length is fixed to the lower surface of the mold support base 11 on the side of the tundish 8 in a direction perpendicular to the length direction of the horizontal mold 2. On the inside of the first guide plate 13, two inclined surfaces 13a and 13b are formed that protrude from both longitudinal ends toward the center.

A second guide plate 14 having a predetermined length is fixed on the base 1 at a position facing the first guide plate 13 described above and spaced apart from the first guide plate 13 by a predetermined distance. A dovetail groove 15 is formed in the lengthwise direction of the flat side surface of the second guide plate 14 facing the first guide plate 13 . The second guide plate 14 has a horizontal surface 14a in contact with the base 1 at its lower end.
The lower end of the first guide plate 13 is located on the horizontal surface 14a with a slight gap therebetween.

Two wedge-shaped movable bodies 16 and 17 are fitted between the first guide plate 13 and the second guide plate 14 .

One side surface of the movable body 16 has an inclined surface 16a that matches the inclined surface 13a of the first guide plate 13, and the other side surface has an inclined surface 16a that fits into the dovetail groove 15 of the second guide plate 14. A protrusion 16b is formed. One side surface of the movable body 17 has an inclined surface 17a that matches the inclined surface 13b of the first guide plate 13, and the other side surface has an inclined surface 17a that fits into the dovetail groove 15 of the second guide plate 14. A protrusion 17b is formed. The movable bodies 16 and 17 are formed with through holes having internal threads in opposite directions along their central axes.

The through holes formed in each of the movable bodies 16 and 17 include
1 having two male threads in opposite directions that screw into the female thread;
A threaded rod 18 for operating the book is inserted. The threaded rod 18 is mounted on the base 1 so as to be rotatable about its axis, and one end thereof protrudes from the side surface of the base 1.

A first spring receiving seat 19 is fixed to the lower surface of the mold support base 11 on the other side farther from the first guide plate 13 described above in a direction perpendicular to the length direction of the horizontal mold 2. At a position on the base 1 facing the first spring receiving seat 19 described above, a second spring receiving seat 19 is provided at a predetermined distance from the first spring receiving seat 19.
A spring seat 20 is fixed.

Between the first spring receiving seat 19 and the second spring receiving seat 20,
Both ends thereof are a first spring receiving seat 19 and a second spring receiving seat 2.
A spring 21 fixed at zero is attached.

In FIG. 3, as shown in the view taken along the line A-A in FIG. 2, flanges 11c projecting outward are formed at the lower ends of the support frames 11b on both sides of the mold support base 11 in the sliding direction. , the flange llc is slidably fitted into a guide frame 22 provided on the base 1 in the same direction as the flange llc.

According to this invention, the horizontal mold and the tundish are connected as follows.

The trolley 9 carrying the tanditsh 8 is moved by a parking mechanism (not shown) toward the entrance end of the horizontal mold 2 provided on the mold support 11 of the base 1, and is moved as shown in FIGS. 1 and 2. As shown in FIG. 2, it is stopped at a predetermined position close to the base 1.

Next, the threaded rod 18 attached to each mold support 11 on the base 1 is rotated manually or mechanically. As the screw stud 18 rotates, the wedge-shaped movable bodies 16 and 17, which are screwed onto the threaded rod 18, move in the horizontal direction, causing the first guide plate 13 in contact with the movable bodies 16 and 17 to move in the horizontal direction. It is pushed out in the direction indicated by the arrow in FIG. 2, which is perpendicular to the direction of movement of the moving bodies 16 and 17.

As a result, the mold support 11 moves on the base 1.

It is guided by the guide frame 22 and moves in the direction of the tundish 8 mounted on the stopped truck 9. Thus, as shown in FIG. 6, the horizontal nozzle 12 at the entrance end of the horizontal mold 2 fixed on the mold support 11 is
It is joined to the outlet end of the front nozzle 24 of the tundish 8.

The above-described bonding is performed for each mold support 11 on the base 1. Therefore, even if the outer part 8a of the dandish 8 facing the horizontal mold 2 is deformed, the connection between each horizontal mold 2 and each front nozzle 24 of the dandish 8 will not become defective.

It should be noted that the threaded rods 18 for operation attached to each mold support 11 must be configured so that their tips protrude from the side of the base 1 so that they can be operated from the side of the base 1. be.

〔Effect of the invention〕

As described above, according to the present invention, the mold support on the base is moved toward the tundish on the trolley, which is located close to the base, and the tip of the horizontal mold on the mold support is moved. , because it connects to the horizontal nozzle of the tanditshu.

During joining, no damage will occur to the front nozzle and lining refractory of the turn date, as well as the horizontal nozzle and break ring at the entrance end of the horizontal mold. In the case of simultaneously casting molten steel into a plurality of pieces of cast steel, each of the plurality of horizontal molds and each of the plurality of front nozzles provided at the lower part of the side wall of the tundish can be easily joined, and, Even if the outer part of the tanditshu towards the horizontal mold is deformed,
Many industrially useful effects such as no bonding defects are brought about.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional schematic side view showing one embodiment of the device of the present invention, FIG. 2 is a partially cross-sectional schematic plan view thereof, and FIG. 3 is a view taken along the line A--A in FIG. 4 is a schematic side view showing a conventional device, FIG. 5 is a schematic plan view of FIG. ...Base, 2...Horizontal mold, 3
... Jacket, 4 ... Conduit, 5 ... Cast steel piece, 6 ... Guide roller, 7 ... Spray chamber 8 ... Tandish, 8a ... Outside part, 9 ...
Dolly, 10... Rail, 11... Mold support stand, 11a... Base plate, 11b... Support frame,
12...Horizontal nozzle, 13...First guide plate, 13a, 13b...Slope, 14...Second
Guide plate, I5... Dovetail groove, 16.17... Moving body, 18... Screw stopper, 19... First spring receiving seat, 20... Second spring receiving seat, 21... Spring ,
22... Information frame. 23...Opening, 24...Front nozzle, 25...
break ring.

Claims (1)

[Claims] 1. Move the cart on which the tundish is mounted toward the horizontal mold provided on the base, and insert the front nozzle attached to the opening in the lower side wall of the tundish into the horizontal mold. In the method of bonding to an entry end of a mold, the horizontal mold is movable on the base along its axis, and the carriage is moved at a position close to the entry end of the horizontal mold. position, and then move the horizontal mold along its axis toward the front nozzle of the tundish mounted on the stationary trolley to open the inlet end of the horizontal mold. A method for joining a horizontal mold and a tundish in a horizontal continuous casting machine, the method comprising joining to an outlet end of the front nozzle. 2. A base, a mold support that is horizontally slidably provided on the base, and a mold support that is fixed on the mold support with its axis in the same direction as the sliding direction of the mold support. a horizontal mold mounted on the mold support base so as to be movable toward the entrance end of the horizontal mold; and a tundish having a front nozzle to be joined to the end part, and the lower surface of the mold support base has two inclined surfaces protruding from both longitudinal ends toward the center part on the inside. , a first guide plate having a predetermined length is fixed in a direction perpendicular to the length direction of the horizontal mold, and a first guide plate is provided on the base at a position opposite to the first guide plate.
A second guide plate having a predetermined length and having a groove in the length direction is fixed to a side surface facing the first guide plate at a predetermined distance from the first guide plate, and the second guide plate has a predetermined length. Between the plate and the second guide plate, one side thereof has an inclined surface that matches each of the two inclined surfaces of the first guide plate, and the other side has an inclined surface that matches each of the two inclined surfaces of the second guide plate. Two movable bodies are fitted into each other, each of which has a protrusion that fits into a dovetail groove and has a through-hole formed along its central axis with internal threads in opposite directions, and the through-hole of the two movable bodies A threaded rod having a male thread that engages with each of the female threads has one end protruding from the side surface of the base, and is inserted through the mold support base so as to be rotatable about its axis. A first spring receiving seat is provided on the lower surface of the holder, which is located away from the first guide plate.
fixed in a direction perpendicular to the length direction of the horizontal mold, and at a position of the base facing the first spring receiving seat,
A second spring receiving seat is fixed at a predetermined distance from the first spring receiving seat, and between the first spring receiving seat and the second spring receiving seat,
A spring is attached, both ends of which are fixed to the first spring receiving seat and the second spring receiving seat, and the movement of the trolley positions the tundish mounted on the trolley close to the base. Seshime, then
Rotating the threaded rod attached to the base and horizontally moving the two moving bodies inserted into the threaded rod and fitted between the first guide plate and the second guide plate. By horizontally moving the mold support on the base toward the tundish via the first guide plate, the inlet end of the horizontal mold is aligned with the outlet end of the front nozzle. A device for joining a horizontal mold and a tundish in a horizontal continuous casting machine, which is characterized by joining the horizontal mold to the tundish.