JPS6230241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a mud gun used for closing the taphole of a reduction furnace or a melting furnace, particularly a blast furnace, or a rotating and tilting device for the mud gun.

The Matsudogan used in blast furnaces generally consists of a rotating, tilting, and filling device and is installed in front of the furnace, but as blast furnaces have become larger in recent years, there has been a need to improve filling capacity and downsize. ing. In other words, the Matsudogan is often installed on the narrow castbed surface between the hot metal trough and the furnace tower or operation bed wall, but due to the increase in the amount of molten metal processed, the number of tap holes increases, the width of the molten metal trough increases, and the environment Installation space is becoming more and more limited due to factors such as casting bed dust collection for maintenance and labor saving purposes, and reinforcement of operation monitoring equipment.

By the way, when closing a taphole with a Matsudo gun, it is of course necessary to align the tip of the gun barrel with the taphole, but the contact surface is subject to wear due to the tapping and dents due to the pressing force of the Matsudo gun, and this happens repeatedly. It tends to fluctuate toward the furnace core. For this reason, the turning and tilting device of the muzzle gun requires a mechanism that tilts laterally when the gun barrel tip approaches the taphole surface and follows the taphole center line that faces the furnace core in a plane. However, in the conventional Matsudo gun with the above mechanism, the maximum radius of rotation during half-plane rotation is large and the gun barrel is tilted in the retracted position, which increases the area and space occupied by the entire device, making maintenance and inspection difficult in terms of space. It had some problems.

To explain such a conventional matsudo gun in detail with reference to FIG. 1, it includes a gun mount c that rotatably supports a gun barrel a at its tip and is rotatably attached to a center post b fixed on a cast bed; A gun mount side bracket d fixed to the upper part of the center post b, a gun barrel side bracket e attached to the tip of the gun mount c so as to be integral with the gun barrel a, and the gun barrel side bracket e and the gun mount side. A link mechanism is constituted by a control rod g which is arranged between the bracket d and the control rod g connected with a pin whose length is determined so that the tip of the gun barrel a coincides with the taphole f. Note that h is the furnace tower or operation floor wall. In a muzzle gun with such a link mechanism, since the gun mount side bracket d is fixed to the center post b, the angle θ between the center line of the gun mount arm c and the center line of the gun barrel a increases during rotation. Therefore, the gun barrel tip trajectory B and the gun barrel rear end trajectory A do not draw concentric circles, and therefore, the maximum turning radius R becomes large, and when the turning angle becomes large, there are problems such as the gun barrel a tilting when retreating. There is.

In view of the above-mentioned circumstances, the present invention has been made with the object of reducing the turning radius and making it possible to hold the gun barrel substantially horizontally in the retracted position of the matsudo gun, thereby making it possible to install it on a limited and narrow casting bed. a gun mount arm with a gun barrel rotatably attached to the tip and a distal end rotatably supported on a center post; a gun mount side bracket rotatably mounted on the center post; A link mechanism is provided, which consists of a gun barrel side bracket that is attached integrally with the gun barrel, and a control rod that has one end connected to the gun barrel side bracket and the other end to the gun mount side bracket with a pin. The gun is provided with a tilting mechanism that tilts the gun barrel in conjunction with rotation, a spring yoke is disposed between the gun mount side bracket and a desired position of the gun mount arm, and a stopper that can be engaged with the link mechanism. is fixed to the center post, and the stopper and the spring yoke regulate the relative position between the gun carriage arm and the gun barrel.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 to 4, a gun mount arm 6 is horizontally pivotably connected to a center post 5 on a mount 4 fixed at a position appropriately spaced from the tap hole 2 and hot metal sluice 3 of the blast furnace 1. A gun barrel 9 is rotatably attached to the tip of the gun mount arm 6 via a gun barrel support 8 having a vertical rotation axis 7, and a gun mount side bracket 10 is rotatably provided on the upper part of the center post 5. A stopper 11 for restricting the movement of the gun mount side bracket 10 is fixed to the center post 5, and the end of the gun barrel side bracket 12 fixed to the shaft 7 so as to be integral with the gun barrel 9 and the gun mount side bracket 10 are connected to each other. The control rod 13 is connected to the tip via a pin.

Further, one end of a spring yoke 15 having a spring 14 is rotatably attached to a predetermined position of the gun carriage side bracket 10, and a spring receiver 16 is slidably inserted into the yoke 15 from the other end of the yoke 15. In addition, a stopper 17 is provided at the other end of the yoke 15 to limit the sliding range of the spring receiver 16.
Further, a shaft portion provided at the lower part of the spring receiver 16 is rotatably supported by a bearing 18 provided on the side of the gun carriage arm 6 opposite to the gun barrel 9.

Reference numeral 19 denotes a known turning and crimping drive device, which includes a cylinder 20 attached to the pedestal 1 and the cylinder 20.
It consists of a sector gear 21 that rotates due to the expansion and contraction movement of the sector gear 21, and a rotation gear 22 provided at the base end of the gun carriage arm 6 so as to mesh with the sector gear 21, and a rotation gear 23 that rotates to tilt the gun barrel 9 in conjunction with the sector gear 21. This tilting device consists of a tilting roller 24 provided at an appropriate position on the upper surface of the gun barrel 9, and a guide rail 25 for guiding the tilting roller 24 provided at the tip of the gun carriage arm 6. In addition, 26 in the figure is a furnace tower or an operation floor wall.

In the closed state, the muzzle gun configured as described above is rotated by the rotation and crimping drive device 19, as shown by the solid line in FIG. Using the angle θ between the gun carriage arm 6 and the gun barrel, which is changed by the link mechanism consisting of the bracket 12 and the control rod 13, the tip of the gun barrel 9 is continuously moved near the taphole 2 following the inclination angle of the taphole 2. It is pressed against the tap hole 2 by a tilting device 23 configured to tilt. In this closed state, the gun carriage arm 6 is located approximately at right angles to the center line of the taphole 2, and the gun barrel 9
The axial centerline of is perpendicular to the gun carriage arm 6. In other words, it substantially coincides with the center line of the taphole 2 in plan view.

Also, a bearing 18 fixed to the side of the gun carriage arm 6
Spring receiver 1 rotatably supported against
6 compresses a spring 14 of a spring yoke 15 which is located at point C in FIG. 3 and whose one end is attached to the gun carriage side bracket 10 whose clockwise movement is restricted by a stopper 11. Therefore, the gun mount side bracket 10 is in the same state as if it were fixed to the center post 5, and the link mechanism consisting of the gun mount arm 6, gun mount side bracket 10, gun barrel side bracket 12, and control rod 13 is fixed to the gun mount side. Bracket 10 is stopper 11
It has the same effect as a fixed object until it separates.

When the gun mount arm 6 is rotated in the retracting direction (clockwise in FIG. 2) about the center post 5 as shown in FIG. The shaft portion of the spring yoke 15 is slid through the bearing 18 until it reaches the stop 17 at the end of the yoke 15. The gun mount side bracket 10 is kept pressed against the stopper 11 by the reaction force of the spring 14, and the gun barrel 9 is connected to the gun mount arm 6, the gun mount side bracket 10, the gun barrel side bracket 12, and the control rod 13. By means of a link mechanism consisting of the following, the gun rotates while drawing a trajectory B at the front end of the gun barrel 9 and a trajectory A at the rear end of the gun barrel 9, which is the maximum turning radius R of the matsudo gun (see Fig. 2).

The gun barrel 9 is returned to the horizontal state in the state shown in FIG. 5 by the tilting device 23 which tilts the gun barrel 9 in conjunction with the above-mentioned turning operation. In the state shown in FIG. 5, it is desirable to set the position of the gun mount arm 6 at a position 15 to 25 degrees backward from the position of the gun carriage arm 6 when it is closed, in view of the tilting locus of the nine barrels.

When the gun carriage arm 6 is further turned in the retracting direction as shown in FIG. 7 by the turning and crimping drive device 19, the gun carriage side bracket 10 comes into contact with the stopper 17 via the bearing 18 as shown in FIG. In addition, it is pulled by the spring yoke 15 whose sliding movement is limited, and moves away from the stopper 11 to rotate in the backward direction together with the gun carriage arm 6.

During this rotation, the relative position (relative angle) of the link mechanism consisting of the gun mount arm 6, gun mount side bracket 10, gun barrel side bracket 12, and control 13 does not change, and therefore, as shown in FIGS. 5 to 7, The forward trajectory B of the gun barrel 9 and the trailing end trajectory A of the gun barrel 9 up to the retracted position of the matsudo gun draw concentric circles with the center post 5 as the center, and the gun barrel 9 maintains a horizontal state.

On the other hand, the operations of turning, advancing, tilting, and crimping from the retracted position of the muzzle gun to the closed position are operations in the opposite direction to the operations described above, and the conditions at each turning position are naturally the same as in the case of turning backward.

In the above embodiment, the stopper is engaged with the gun carriage side bracket, but it may be engaged with a control rod, etc., and various other changes may be made without departing from the gist of the present invention. Of course.

As described above, according to the present invention, a spring yoke and a stopper are provided between the gun mount arm and the gun mount side bracket to limit the angle formed by the gun barrel and the gun mount bracket, so that the maximum angle when the gun barrel rotates is The turning radius can be made small, and the gun barrel can be held horizontally when turning and retreating.Therefore, (i) it can be installed even in a narrow casting bed.

(ii) The distance between the furnace tower and related equipment around the casthouse is increased, making it safer when turning the Matsudogan.

(iii) By increasing the turning angle, the gun barrel moves away from the hot metal gutter, making gutter repair work easier.

(iv) The height of the Mazdogan can be lowered.

(v) Easier supply of muzzle to the gun barrel.

(vi) The space for maintenance and inspection of Matsudo guns will be expanded.

Demonstrates excellent effects such as

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the turning locus of a conventional matsudog gun, Fig. 2 is a plan view showing the turning locus of the matsudogan of the present invention, Fig. 3 is an enlarged view of the main parts of the matsudogan in Fig. 2, and Fig. 4 is -arrow view of Figure 3,
5 and 7 are respectively plan views showing the operating state of the muzzle gun of the present invention, FIG. 6 is an enlarged view of the main parts of FIG. 5, and FIG. 8 is an enlarged view of the main parts of FIG. 7, respectively. 5... Center post, 6... Gun mount arm, 8... Gun barrel support, 9... Gun barrel, 10... Gun mount side bracket, 12... Gun barrel side bracket, 13... Control rod, 14... Spring, 15... Spring yoke, 16... Spring receiver, 17... stopper,
18...Bearing, 19...Swivel, crimping drive device, 23
…Tilt device.

Claims (1)

[Claims] 1. A gun mount arm with a gun barrel rotatably attached to the tip and a distal end rotatably supported on a center post, a gun mount side bracket rotatably attached to the center post, and a gun barrel attached to the tip of the gun mount arm. The gun barrel side bracket is attached to be integrated with the
A link mechanism is provided with a control rod having one end connected to the gun barrel side bracket and the other end connected by a pin to the gun mount side bracket, and a tilting mechanism that tilts the gun barrel in conjunction with the rotation of the gun mount arm. and a spring yoke is disposed between the gun mount side bracket and the gun mount arm at a predetermined position, and a stopper capable of engaging with the link mechanism is fixed to the center post, and the stopper and the A Matsudo gun characterized by a spring yoke that regulates the relative position of the gun carriage arm and gun barrel.