JPS582532Y2 - Rotary casting nozzle quick change device - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a device for changing casting nozzles, such as immersion nozzles and long nozzles, which are fitted into pouring nozzles at the bottom of the pouring volume of molten steel when pouring molten steel.

For example, in a continuous steel casting method or a steel ingot casting method, a casting nozzle is interposed between the mold and the molten steel container (tandish or casting pot) that injects molten steel into the mold to improve the quality of the steel. is being carried out.

However, since this casting nozzle comes into contact with molten steel during operation, its lifespan is short and it is required to be replaced relatively frequently.

Due to the nature of the process, it is necessary to replace casting nozzles quickly, and given the high-temperature work environment, it is important that the work be as simple and light for the worker as possible, and that it be done as far away from the heat source as possible. desirable.

Various types of equipment have been proposed in the past, but all of them involve removing a damaged casting nozzle in a high-temperature working environment and then replacing it with a new casting nozzle. However, it was not very quick, and the work was very difficult for the workers as they had to get close to the heat source.

This proposal was made in view of the above-mentioned circumstances, and its gist is that an arm lifting device is attached to the outer wall of the container, and a casting nozzle is attached to the end of the arm that is rotatably attached to the lifting device. If the casting nozzle at the thick end of the arm is damaged due to use, the arm can be swung and the damaged casting nozzle separated from the heat source can be replaced at that location.

Hereinafter, the present invention will be explained in detail based on embodiment figures.

In the figure, 1 is the bottom wall of the container, 2 is the sliding nozzle device attached to this, 3 is the pouring nozzle, and 4 is the proposed device fitted into a holder 6 with a locking dowel 5 attached to its side. As will be described later, the casting nozzles that are attached and detached are shown respectively, and the configuration of the present apparatus in which the casting nozzle 4 is assembled and replaced with the pouring nozzle 3 will be described. 32 is the container bottom wall 1
A supporting member provided in the cylinder suspension frame 7,
A lifting device is supported within this frame by a head 9 of a cylinder support shaft 8.

This head 9 is supported horizontally within a predetermined range and cannot be tilted, and this horizontally movable mechanism is supported by a second
As shown in the enlarged view of the figure, rollers 11 run on rails 10 laid on the bottom of the frame on both sides of the head 9.
. . , and rollers 12 are suspended from the front and rear of the frame top plate to press down the head 9. As a result, the head 9 can be moved horizontally along the rail 10, and can be prevented from tilting. This is also impossible due to the pressure applied by the roller 12.

The through hole 13 for the cylinder support shaft 8 formed in the bottom of the frame is formed into a long and slender hole corresponding to the cylinder support shaft 8 horizontally moving within a predetermined range as described above.

14 is a cylinder, 15 is a cylinder 14, 16 is a joint shaft, and 17 is an arm.As shown in FIG. The holder 6 is inserted into the provided dowel locking recess 19.
By engaging the locking dowel 5 on the side, the casting nozzle 4
is locked and installed.

20 is an upright wall portion fitted into the center of the arm 17; 21;
4 is a bearing body provided at the center of the arm 17. As shown in the enlarged view of FIG. 25, and the arm 17 is cut off from the shaft 23 in its rotational direction.

Reference numeral 26 denotes a base frame for installing a roller bearing that faces the upright wall portion 20 provided on the bottom wall 1 of the container, and at the tip thereof, as shown in the enlarged view of FIG. 5, there is a frame 28 for assembling the roller bearing 27. A hanging support shaft 20 is suspended by its head 29 with a bracket 30 interposed therebetween, and the roller bearing 27
The lace plate 31 that comes into contact with the base frame 26 as shown in the figure
They are provided on both upper surfaces of the upright wall portion 20 opposite to.

The figure shows a state in which the roller bearing 27 and the race plate 31 are separated from each other, but in a state in which they are in contact when the cylinder suspension frame is inserted, the casting nozzle 4 hits the pouring nozzle 3 at the other end of the arm 17. The biasing force for clockwise rotation generated by the contact is elastically pushed back by the strip 30, and the strip 30 also exhibits the function of being able to cope with dimensional changes due to wear between the nozzle bricks due to its buffering ability. do.

The through hole 32 of the joint shaft 16 formed in the base frame 26 is a long and narrow hole in accordance with the horizontal movement of the cylinder support shaft 8 within a predetermined range.

The operating procedure of the proposed device having the above configuration will be described below.

The arm 17 is lowered by operating the cylinder 14, and the casting nozzle 4 is fixedly attached to the receiving arms 18 at both ends.The arm 17 is raised again by operating the cylinder 14, and the casting nozzle 4 is connected to the pouring nozzle. 3.

This mode continues until the casting nozzle in use is damaged. During this period, the movement of the arm 17 during the operation of the sliding nozzle device 2 is described in the explanatory diagram of FIG. 6. It moves in parallel with the arrow A to perform a linear reciprocating motion as shown by arrow A.

Then, the center point of the arm 17 is dragged or pushed back by this movement and performs a linear reciprocating motion along the rail 10 as indicated by the arrow.

At this time, from the center of the arm 17 on the side where the unused casting nozzle is present, the roller bearing As shown in FIG. 5, the lace plate 31, which must maintain contact with the lace plate 27, has the above-mentioned horizontal area.

When the casting nozzle in use becomes damaged and needs to be replaced, the arm 17 is lowered by operating the cylinder 14, and the third
As shown in the figure, the arm 17 is manually swung 180 degrees to position the unused casting nozzle 4 below the pouring nozzle 3, and the arm 17 is raised again by operating the cylinder 14 to remove the unused casting nozzle 4. is brought into contact with the pouring nozzle 3.

Thereafter, the damaged casting nozzle is removed, a spare casting nozzle 4 is fitted in its place, and the button is pressed.

If the lower end of the casting nozzle 4 gets caught in the mold when swinging the arm 17, it is sufficient to raise the container.

From now on, repeat this process.

The device of the present invention, such as the one on the top, is very suitable for quickly replacing damaged nozzles, and also because the nozzle replacement work can be performed at a location remote from the heat source.

In addition to the above, as a modification, the lifting device for the arm 17 may be either pneumatic or hydraulic in the case of a cylinder set as in the embodiment, or may be a manual type such as a gear type, a chain winding type, or a bayonet type.

Regarding the arm 17, as in the embodiment, the cylinder rod 1
In addition to extending to both sides with the casting nozzle 5 at the center, it may also be extending in only one direction.In this case, the casting nozzle 4 can be replaced by swinging the arm 1γ using a jig, etc., replacing the casting nozzle, and swinging it again. It is used for pressure contact with pouring nozzles such as casting nozzles.

In addition, the example shows an example of use in a two-plate method (a sliding plate slides against a fixed plate to control the flow rate) with a sliding nozzle, but a three-plate method (one in which the upper and lower fixed plates are slid to control the flow rate) is used. It is a matter of theory that it can also be used for things that control the flow rate.

In this case, since the casting nozzle does not need to follow the sliding movement of the sliding nozzle, there is no need for the lifting device to move radially, and therefore horizontal movement is possible within the cylinder suspension frame T as shown in the embodiment. configuration is not necessary.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall view of the proposed device, FIGS. 2A and B are an enlarged detailed front view and a longitudinal side view of the area enclosed by the circle in FIG. 1, and FIG. 3 is a plan view for explaining the operation of the arm,
Figure 4 is an enlarged detailed view of the enclosed circle ■ part in Figure 1, Figure 5 A,
B is an enlarged detailed front view and left side view of the line V section in Figure 1;
FIG. 6 is an explanatory plan view showing the relationship between the movements of the spouting nozzle and the arm of the sliding nozzle device. Explanation of symbols, 1... Bottom wall of container, 2... Sliding nozzle device, 3... Pouring nozzle, 4... Casting nozzle, 5... Locking dowel, 6... Holder 7.
...Cylinder hanging frame, 8...Cylinder support shaft, 9
...Head, 10...Rail, 11...Roller, '12...Roller, 13...Through hole, 14...
・Cylinder 15... Cylinder rod, 16...
・Joint shaft, 17... Arm, 18... Receiving arm, 19.
... Dowel locking recess, 20... Standing wall part, 21...
Bearing body, 22... Locking flange, 23... Shaft rod, 24...
...Thrust bearing, 25...Radial bearing, 26...
・Base frame for mounting rollers, 27... roller bearings, 28・
... Frame, 29 ... Suspension support shaft, 30 ... Brushing strip, 29
'...head, 31...lace board.

Claims (1)

[Scope of utility model registration request] In a casting nozzle exchange device in which a lifting device having an arm horizontally rotatably fixed to the lower end of an lifting rod is attached to the side surface of the melt through a support member, and a casting nozzle is held at the tip of the arm, the lifting device is supported. 1. A casting nozzle quick exchange device, characterized in that it is horizontally movable in a direction intersecting the sliding direction of a sliding nozzle by a horizontal movement mechanism provided on the member.