JPH0519175Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a door-type rotary nozzle, and more specifically, to a rotor drive device for a door-type rotary nozzle.

[Conventional technology]

Rotary nozzles are widely used in ladles that receive and transport molten steel tapped from a converter and pour it into a mold, tundishes that receive molten steel from a ladle and pour it into a mold, etc. In particular, door-type rotary nozzles, which open and close by rotating a rotor including sliding plate bricks on a hinge, have been widely used recently because they have many features, such as exposing the sliding surfaces to allow the naked eye to check the damaged condition of the plate surfaces of the fixed plate bricks and the sliding plate bricks, and facilitating the work of replacing or repairing bricks without the need to prepare a spare set.

Such a door-type rotary nozzle is rotatably mounted on a base attached directly or via a member to the bottom of a ladle, etc., and outputs from a drive source such as a motor to a reducer or intermediate gear. The opening degree of the nozzle is adjusted by rotating this gear and thus the sliding plate brick.

An example of such a rotary nozzle is shown in FIG. In the figure, 1 is a bottom plate of a ladle, tundish, etc., 2 is a base fixed to the bottom plate 1 with bolts, and a fixing plate brick 3 is attached. 5 protrudes from a hole penetrated through the bottom plate 1 and base 2 of the ladle etc.,
This is the upper nozzle connected to the nozzle hole 4 of the fixed plate brick 3. Reference numeral 6 denotes a fixed frame (door) attached to the base 2 via a hinge 7 so as to be openable and closable. 8 is a rotor housed in the fixed frame 6 and rotatably disposed on the movable frame 13 via a ball bearing 9;
A gear 10 that meshes with a gear 21 connected to a drive source via a reducer, an intermediate gear, etc. is provided on the outer periphery, and a sliding plate brick 11 is housed in the upper part facing the fixed plate brick 3. ing. 14 is the sliding plate brick 11
This is the collector nozzle that connects with the collector nozzle. Reference numeral 15 denotes a spring seat that faces the movable frame 13 in the fixed frame 6 and is provided closely along the outer periphery of the rotor 8, and a coil spring 16 is interposed between each spring seat and the movable frame 13.

In the rotary nozzle as described above, when injecting molten steel, the collector nozzle 14 is attached to the rotor 8, the fixed frame 6 is closed and fixed to the base 2 with bolts, etc., and the fixed plate brick 3 is fixed as shown in FIG. Since the sliding plate bricks 11 and 11 are in close contact with each other by the elastic force of the coil spring 16, there is no risk of leakage from between the bricks 3 and 11 even if molten steel is injected. Note that, if necessary, the rotor 6 is rotated by a drive source to adjust the opening degrees of the nozzle holes 4 and 12 to control the injection amount of molten steel.

In addition, the state of damage to the sliding surfaces of the fixed plate brick 3 and the sliding plate brick 11 is inspected, and these bricks 3,
When repairing or replacing the rotor 11, loosen the nut 18 and rotate the swing bolt 17 as shown in FIG. It is sufficient to separate the fixed frame 6 from the connected gear 21 and open it by rotating the fixed frame 6 about the hinge 7 in a door-like manner (FIG. 3 is a side view of FIG. 2).

In this case, even if it is attempted to rotate the fixed frame 6 about the hinge 7, the fixed frame 6 may not be able to rotate due to the interference of the gear 21 meshing with the gear 10 of the rotor 8. However, as shown in Japanese Patent Application Laid-Open No. 59-141364, for example, the gear 10
By slightly lowering the gear 10, or by making the gap from the tip circle of gear 10 to the dedendum circle of gear 21, that is, the top gap between both gears 10 and 21, larger than usual, interference of gear 21 can be prevented. The fixed frame 6 can be rotated without being affected.

[Problem that the invention attempts to solve]

In the door type rotary nozzle as described above, when rotating the fixed frame 6, the rotor 8
The gear 10 and the gear 21 connected to the drive source may mesh strongly, making it impossible to rotate the fixed frame 6.

In such a case, the motor that is the drive source is slightly rotated to rotate the gear 21 in a direction that loosens the mesh (up to the amount of backlash).
Since the rotation is extremely small, fine adjustment of the rotation of the motor is extremely troublesome and has to be repeated several times.

The present invention has been developed to solve the above problems, and aims to provide a rotor drive device for a door-type rotary nozzle that has a simple structure and can easily release the strong meshing of both gears. be.

[Means for solving problems]

The rotor drive device of the door-type rotary nozzle according to the present invention includes a base that is attached to the bottom of a ladle or the like and has a fixed plate brick, a frame that is attached to the base so that it can be opened and closed via a hinge, and a gear on the outer periphery. a rotary nozzle equipped with a rotor provided with a sliding plate brick and rotatably housed in the frame via a spring, and attached to the bottom of the ladle etc. adjacent to the rotary nozzle. drive source, gears,
A drive source box containing a gear connected to the gear of the rotor via a speed reduction mechanism consisting of a worm and a worm wheel, and a handle connected to the shaft of the worm outside the drive source box. It is.

[Effect]

When opening the frame containing the rotor, manually rotate the handle outside the drive source box, rotate the gear that strongly meshes with the rotor gear via the worm, worm wheel, etc., and release the mesh between both gears. do.

〔Example〕

FIG. 1 is a schematic diagram of an embodiment of the present invention, and the same or equivalent parts as those of the door-type rotary nozzle in FIG. 2 are given the same reference numerals. Reference numeral 20 denotes a drive source box attached to the bottom of a ladle or the like along with the door-type rotary nozzle, and houses the drive source, speed reduction mechanism, gear train, etc. described below.

Reference numeral 22 is a motor serving as a driving source, and 23 is an output gear thereof, which is connected to a gear 25 via an intermediate gear 24. 26 is a worm attached to the shaft of the gear 25, 27 is a worm wheel that meshes with the worm 26, and a gear 28 is attached to the rotating shaft.
This gear 28 meshes with a gear 21 connected to the gear 10 of the rotor 8. A handle 30 is fixed to the shaft of the worm 26 outside the drive source box 20. Note that the handle 30 may be loosely fitted onto the shaft of the worm 26 and fixed as necessary.

Furthermore, although the top gap between the gear 10 and the gear 21 that meshes therewith is made larger than usual, the gear 10 may be lowered instead of increasing the top gap.

In the present invention configured as described above, when adjusting the opening degrees of the nozzle holes 4 and 12 in order to control the amount of molten steel injected, the motor 22 is rotated. The rotation of the motor 22 is transmitted from the worm 26 to the worm wheel 27 via gears 23, 24, 25,
During this time, the speed will be significantly reduced. Worm wheel 2
The rotation of 7 is transmitted to the gear 10 of the rotor 8 via the gears 28 and 21, which rotates the rotor 8 and causes the sliding plate brick 11 attached thereto to move together, so that the nozzle hole 4 of the fixed plate brick 3 and Adjust the opening. At this time,
Since the meshing surface of the teeth 21a of the gear 21 is strongly pressed against the meshing surface of the teeth 10a of the gear 10 of the rotor 8, it is difficult to open the fixed frame 6 in this state.

Therefore, in the present invention, the handle 30 is manually rotated, and the gear 21 is slightly rotated in the direction of the arrow a through the worm 26, the worm wheel 27, and the gear 28.
The strong meshing of the meshing surfaces of a and 21a is released. Thereby, the fixed frame 6 can be easily rotated about the hinge 7 and opened.

Although the embodiments of the present invention have been described above, the configuration of the gear train in the drive source box 20 is not limited to the above embodiments, and may be any structure as long as it includes a worm and a worm wheel as a speed reduction mechanism.

[Effect of idea]

As is clear from the above explanation, the present invention releases the strong meshing between the gear provided on the rotor and the gear on the drive source side by manually rotating the handle connected to the shaft of the worm. So,
It is easy to finely adjust the rotation, and the engagement can be released in a short time, so that the fixed frame can be easily rotated around the hinge and opened.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is a vertical sectional view of a door-type rotary nozzle, and FIG. 3 is a side view showing the door with the door open. 2... Base, 3... Fixed plate brick, 6... Fixed frame, 7... Hinge, 8... Rotor, 10...
Gear, 11... Sliding plate brick, 20... Drive source box, 21, 23, 24, 25, 28... Gear,
22...Motor, 26...Worm, 27...Worm wheel, 30...Handle.

Claims (1)

[Scope of claim for utility model registration] A base that is attached to the bottom of a ladle or the like and is provided with a fixed plate brick, a frame that is attached to the base so that it can be opened and closed via a hinge, and a sliding plate that has gears on its outer periphery. a rotary nozzle equipped with a roller arranged with bricks and rotatably housed in the frame via a spring; a rotary nozzle mounted on the bottom of the ladle etc. adjacent to the rotary nozzle, and equipped with a drive source and a gear; , a drive source box housing a gear connected to the gear of the rotor via a speed reduction mechanism consisting of a worm and a worm wheel, and a handle connected to the shaft of the worm outside the drive source box. A rotor drive device for a door-type rotary nozzle.