JPS59107765A - Method for cooling coil spring of rotary nozzle - Google Patents

Abstract

PURPOSE:To extent the life of bricks by supplying discretely air, etc. to many coil spring to cool the springs thereby bringing a sliding plate brick into tight contact with a stationary plate brick with uniform force and preventing the leakage of a molten steel and intrusion of air. CONSTITUTION:Air for cooling fed from an air pressure source is fed through a pipeline 23, the hole 6a of a frame 6, and the through-hole 22 of each guide pipe 21 to the coil springs 9 in a chamber 8. The air runs through the clearances among the strands of the respective springs 9 and is released through a clearance 6b to the outside. The springs 9 are respectively cooled and are maintained at a prescribed temp. during this time. Since the cooling effect is acted equally to all the coil springs, all the coil springs are maintained always under the same condition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary nozzle attached to the bottom of a molten steel ladle such as a ladle or a tundish, and more specifically, a method for cooling a coil spring mainly for bringing a sliding plate brick into close contact with a fixed plate brick. It is related to.

An example of a rotary nozzle is shown in FIG. 1 (not known). 1 is a base fixed to the bottom of the molten steel ladle, 2 is a hinge I
A and Ib are rotatably attached to the nozzle hole 4.
A fixed plate brick 6 having a shape is housed therein. 5 is a door. 6 is a cylindrical frame whose lower part is bent and the cross section is ML-shaped; 7 is a movable member with an inverted cross section disposed below frame O; the frame 6 and the movable member 7 are Inside the donut-shaped chamber 8 formed by the
Ne9 is placed. 11 is a flanged cylindrical rotor that is rotatably disposed on the movable member 7 via a number of ball bearings 10; 12 is a gear fixed to the outer periphery of the rotor 11; 16;
is a sliding plate brick equipped with nozzle holes 14, 14at and attached to the rotor 11. This door 5 is closed during operation and is locked by the Ronfirm 25.25a. door 5
When the rotor 11 is locked, the rotor 11 is uniformly pressed by the coil spring 9 to bring the sliding plate brick 16 into close contact with the fixed plate brick 6. In addition, 16 is a sliding plate brick 16 that is supported by the supporting hardware 15.
The lower nozzle 26 is connected to the nozzle holes 14 and 14a of the lower nozzle, and is an intermediate gear that meshes with the gear 12 and rotates the mouthpiece 11. The lower nozzle 26 is connected to a motor (not shown) through a reduction mechanism.
is connected to.

By the way, since such a rotary nozzle is attached to the bottom of the molten steel ladle, the radiant heat is used during work.
The temperature will be as high as 00℃. For this reason, the coil spring 9 is heated and deteriorated, so in order to prevent this, air is blown through the hole 18 provided in the outer wall of the frame B, circulated around the inside of the chamber 8, and then passed through the other hole 18a to the outside. The coil spring 9 is cooled.

However, in this cooling method, although the coil spring near the air blowing hole 18 is well cooled, the coil spring 9 is compressed during work and the spacing between the wires becomes narrow (1
~ 2 fights) Due to poor air circulation, the air is heated while flowing through the chamber 8, and when it is discharged to the outside from the hole 18a, it becomes quite high temperature, causing the coil spring 9 near the hole 18a to become heated. is hardly cooled, and the cooling effect varies greatly depending on the location. As a result, there are differences in the performance of the coil spring 9 depending on where the cooling effect is good and where the cooling effect is bad, and the pressing force of the rotor 11 is different depending on the location. I can't do it,
This caused molten steel leakage, air intrusion, and early wear and tear of both bricks.

The present invention was made in order to solve all of the conventional problems as described above, and by uniformly cooling all the coil springs, all the coil springs are always applied to the rotor under the same conditions. The purpose of this invention is to obtain a coil spring cooling system for a rotary nozzle that applies uniform force to sliding plate bricks and completely fixed plate bricks.

In order to achieve the above object, the coil spring cooling method for a rotary nozzle according to the present invention includes a rotor that accommodates fixed plate bricks and sliding plate bricks and is equipped with gears on the outer periphery, and the rotor is connected to a rotor through a movable member. A rotatably mounted frame or the like presses the rotor with a large number of coil springs disposed between the movable member and the frame to bring the sliding plate brick into close contact with the fixed plate brick. The rotary nozzle thus constructed is characterized in that air or the like is individually supplied to the plurality of coil springs to cool the coil springs. The present invention will be explained below using the drawings.

Fig. 2 is a longitudinal sectional view of the embodiment of the present invention, and Fig. 6 is its A-A
FIG. Note that parts with the same or similar functions as those in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted. 19 This is a guide for the coil spring 9, which includes a spring seat 20 and a guide 21, and has a through hole 22 in the center. 6a is a hole provided at the bottom of frame B and communicates with the through hole 22; 6b is a hole provided in the inner circumferential wall of frame 6 for releasing all the air; 26
is a conduit arranged on the lower side of the frame 6, which communicates with each hole 6a provided at the bottom of the frame 6, and is connected to an air pressure source (not shown). In addition, the above guide 1
Nine holes 6a and discharge holes 6b are provided for each coil spring 9.

In the rotary nozzle configured as described above, if the rotor 11 is now rotated via the gear 12 and the opening degrees of the nozzle holes 4 and 14 are adjusted to a desired value, the molten steel in the molten steel ladle will flow through the upper nozzle, It is injected into a mold or the like through the nozzle hole 4.14 and the lower nozzle 16. On the other hand, the cooling air sent from the air pressure source is sent from the pipe line 23 to the coil spring 9 through the hole 6a of the frame B and the through hole 22 of each guide 19, as shown in FIG. This air passes through the gap between the wires of each coil spring 9 (according to the embodiment, there are 1 to 2 gaps) and is released from the outlet 6b to the outside. During this time, the coil spring 9 is cooled. to maintain the specified temperature.

Since such a cooling effect is applied equally to all coil springs, all coil springs can always be kept under the same conditions. Therefore, there is no risk of causing a difference in the performance of the coil spring, and it is possible to press the sliding plate bricks with a uniform force after roasting and rolling them, and to make them adhere uniformly to the fixed plate bricks.

In the above description, a case has been shown in which the fixed plate brick is configured to be openable and closable by means of a hinge, but it goes without saying that the present invention can also be applied to a rotary nozzle in which the fixed plate brick is fixed to a base. Moreover, although the case where the air discharge hole is provided in the inner circumferential wall of the frame is shown, it may be provided in the outer circumferential wall of the frame.

Furthermore, although we have shown the case where the coil spring is cooled with air,
Fluids other than air may also be used. The shapes and configurations of other parts are not limited to the above embodiments, and can be modified as appropriate without departing from the gist of the present invention.

As is clear from the above description, according to the present invention, by individually and uniformly cooling a large number of coil springs,
All coils are operated under the same conditions, and the sliding plate brick can be brought into close contact with the fixed plate brick with uniform force, which prevents molten steel leakage and air intrusion, and extends the life of the brick. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a rotary nozzle for explaining the present invention, Fig. 2 is a longitudinal cross-sectional view of an embodiment of the present invention, Fig. 6 is a cross-sectional view taken along line A-A, and Fig. 4 is an explanation of the operation of the present invention. It is a diagram. 1: Base, 3: Fixed plate nozzle, 6: Frame, 9: Coil spring, 11: Rotor, 12: Gear, 16: Sliding plate brick, 17: Hinge, 19: Guide, 6a: Hole, 6b: Release hole , 22: through hole, 23: conduit. Agent: Sanro Kimura, Attorney-at-Law, Figure 3, Figure 4, 1977-13113, I+ 1, Indication of the case, Patent application 1982-217685, 2, Title of the invention: Coil spring cooling system for rotary nozzles 3, Person making the amendment Relationship with Patent Applicant Name (Name) (412) Nippon Kokan Co., Ltd. 4, Agent 0 is ''' 6 persons) Address
Toranomon-cho, Minato-ku, Tokyo 1421-19÷j5,
With [] Showa month l1l (Shipping 1
” Month 11) 6, Supplement 11, all columns of the subject specification, drawing 7, and contents of the catch type (1) The full text of the specification is corrected to the notice of the attached amended specification. (2) Drawings The amendments are made in accordance with the attached amended drawings in Figures 2, 3, and 4. Description 1, Title of the invention: Coil spring cooling method for rotary nozzle 2, Claims: Fixing plate brick, sliding It consists of a rotor that accommodates plate bricks and has gears on its outer periphery, and a frame on which the rotor is rotatably mounted via a movable member. A large number of coil springs are arranged between the movable member and the frame. In the rotary nozzle configured to press the rotor to bring it into close contact with the sliding plate brick and the fixed plate brick, the coil springs may be cooled by individually supplying air or the like to the plurality of coil springs. A coil spring cooling system for a rotary nozzle characterized by: 6. Detailed Description of the Invention The present invention relates to a rotary nozzle that is attached to the bottom of a molten steel ladle such as a ladle or tundish, and more specifically, to a sliding plate brick. An example of a rotary nozzle is shown in Figure 1 (not publicly known), 1 is a base fixed to the bottom of a molten steel ladle, 2 is a It is a metal holder and is pivotally attached to the base 1 by hinges Ia and Ib, and a fixed plate brick 36 having a nozzle hole 4 is accommodated in the holder 2. 5 is a door. 6 is a lower part. (1st
A cylindrical frame whose cross section is formed into an rL-shape by bending A (right); 7 is a movable member with an inverted cross section disposed above frame B; frame 6 and the movable member A large number of coil springs 9 are arranged in a donut-shaped chamber 8 formed by 7 and 7. , 11 is a flanged cylindrical rotor rotatably disposed on the movable member Z via a large number of ball bearings 10, 12 is a gear fixed to the outer periphery of the rotor 11, 13
is a sliding plate brick equipped with nozzle holes 14.14aZ and attached to the rotor 11. This door 5 is closed during operation and is locked by locking A25.25a. door 5
When the rotor 11 is locked, the rotor 11 is uniformly pressed by the coil spring 9 to bring the sliding plate brick 13i into close contact with the fixed plate brick 6. In addition, 16 is a sliding plate brick 16 by the supporting hardware 15.
The collector nozzle 26 is an intermediate gear that meshes with the gear 12 and rotates the rotor 11, and is connected to a motor (both not shown) through a reduction mechanism. There is. By the way, since such a rotor J-nozzle is attached to the bottom of the molten steel ladle, the temperature reaches a high temperature of about 300°C due to radiant heat during operation. For this reason, the coil spring 9 is heated and deteriorated, so to prevent this from happening, air is blown through the hole 18 provided in the outer wall of the frame B, and the air is blown around the inside of the chamber 8 and then through the other hole 48a to the outside. The coil spring 9 is cooled. However, in such a cooling method, although the coil spring near the hole 18 into which air is blown is well cooled, the coil spring 9 is compressed during work, and the spacing between the strands becomes narrow (1
~2 vlm), the air circulation is poor, and as a result, the air is heated while flowing through the chamber 8, and when it is discharged to the outside from the hole 18a, it reaches a considerably high temperature.
The nearby coil spring 9 is hardly cooled, and the cooling effect varies greatly depending on the location. As a result, there are differences in the performance of the coil spring 9 depending on where the cooling effect is good and where it is bad, and the pressing force of the rotor 11 is different depending on the location. 3, 15 due to molten steel leakage, air intrusion, or both bricks 3 and 15.
This caused premature wear and tear. The present invention was made to solve the above-mentioned conventional problems. By cooling all the coil springs uniformly, all the coil springs are always applied to the rotor under the same conditions, and the sliding effect is improved. The object of the present invention is to obtain a coil spring cooling system for a spout/tally nozzle in which a movable plate brick is brought into close contact with a fixed plate brick with uniform force all around the circumference. In order to achieve the above-mentioned purpose, the coil spring cooling method for a rotary nozzle according to the present invention accommodates a fixed plate brick and a sliding plate brick, and has a gear on the outer periphery. Is the rotor equipped and the rotor a movable member? It consists of a frame etc. which is rotatably mounted through the movable member, and a large number of coil springs arranged between the movable member and the frame press the rotor to bring the sliding plate brick into close contact with the fixed plate brick. In the rotary nozzle configured as above, air or the like is individually supplied to each of the plurality of coil springs to cool the coil springs. The present invention will be explained below using the drawings. Fig. 2 is a longitudinal sectional view of the embodiment of the present invention, and Fig. 6 is its A-A
It is a sectional view (partially omitted). Note that parts having the same or similar functions as those in FIG. 1 are given the same reference numerals, and explanations thereof will be omitted. 19 is a guide consisting of an annular spring seat 20 and a plurality of guide tubes 21, and the center hole 22 of each guide tube passes through the spring seat 20"r. 6a is provided at the bottom of the frame 6, and the through hole 22 6b is a gap between the inner peripheral wall of the frame 6 and the movable member 7, from which the air inside the chamber 8 is released. 26 is a conduit provided below the Z worm 60. The guide tube 21 and the hole 6a are connected to each of the holes 6a provided at the bottom of the frame 6, and are connected to an air pressure source (not shown). In the rotary nozzle configured as described above, if the rotor 11 is now rotated via the gear 12 and the openings of the nozzle holes 4 and 14 are adjusted to a desired value, the molten steel in the molten steel ladle will be , upper nozzle, nozzle hole 4.14 and collector nozzle 16
It is then poured into molds, etc. On the other hand, the cooling air sent from the air pressure source passes through the hole 6a of the frame 6 and the through hole 22 of each guide tube 21 from the horizontal pipe line 23 shown in FIG. 4 to the coil spring in the chamber 8. Sent to 9th. This air passes through the gap between the strands of each coil spring 9 (according to the embodiment, 1 to 2 lines) and is released to the outside from the gap 6b. In this way, the cooling effect is applied equally to all coil springs, so all coil springs can be kept under the same conditions at all times.Therefore, there are no differences in the performance of coil springs. It is possible to press the rotor and therefore the sliding plate bricks with uniform force and make them adhere uniformly to the fixed plate bricks.In the above explanation, both the fixed plate bricks and the sliding plate bricks are hinged. The case where it is configured so that it can be opened and closed is shown, but
It goes without saying that the present invention can also be applied to a rotary nozzle in which a fixed plate brick is fixed to a base. Further, in addition to the gap 6b, air discharge holes may be provided in the inner circumferential wall of the frame or the outer circumferential wall of the frame. Furthermore, we have shown the case of cooling a coil spring with air, but what about fluids other than air? The shape and configuration of other tower parts that may be used are not limited to the above embodiments, and can be modified as appropriate without departing from the gist of the present invention. As is clear from the above description, according to the present invention, by individually and uniformly cooling a large number of coil springs,
All coil springs are operated under the same conditions, and the sliding plate brick can be brought into close contact with the fixed plate brick with uniform force, preventing molten steel leakage and air intrusion, and extending the life of the brick. can. 4. Brief Description of the Drawings Fig. 1 is a perspective view of a rotary nozzle for making wood-bream fish, and Fig. 2 is a longitudinal cross-sectional view of an embodiment of the present invention. FIG. 6 is a sectional view taken along the line A-A, and FIG. 4 is an explanatory diagram of the operation of the present invention. 1: Base, 3: Fixed plate brick, 6: Frame, 9: Coil spring, 11: Rotor, 12: Gear, 16: Sliding plate brick,
17: Hinge, 19 guide. 6EL=hole, 6b: gap, 22: through hole, 26: conduit. Agent Patent Attorney Sanro KimuraFigure 2Figure 3Figure 4

Claims (1)

[Scope of Claims] A rotor that accommodates fixed plate bricks and sliding plate bricks and has gears on its outer periphery, and a frame or the like on which the rotor is rotatably mounted via a movable member; In one rotary nozzle, the rotor is pressed by a large number of coil springs disposed between the frame and the sliding plate brick is brought into close contact with the fixed plate brick; A coil spring cooling method for a rotary nozzle, characterized in that the coil springs are cooled by individually supplying all air.