JPS5953615A - Slag cutting device to be used for converter or the like - Google Patents

Abstract

PURPOSE:To provide a titled device which enables stable operation while keeping a carriage and table free from the load deviated with the extension or contraction of a stopper supporting arm by disposing the table which supports the body of a slag cutting device so as to move upward or downward in the specified direction relatively to the carriage. CONSTITUTION:A carriage 2 is run until the axial line of a stopper supporting arm 14 and the axial line of a converter C align at the same instant when the converter C starts tilting in a tapping direction, then the carriage is stopped. The arm 14 is extended by an arm extending mechanism 16 so that a stopper 13 is positioned in the converter in order to close the tap hole E of the converter C; at the same time, a table 4 is lowered by a hydraulic cylinder 3 and a slag cutting device 1, that is, the arm 14 is tilted downward by a hydraulic cylinder 11, whereby slag cutting is accomplished. The cylinders 3, 11 are actuated to retreat ring rods 3a, 12 upon ending of the operation and the mechanism 16 is operated to retreat the arm 14 from the inside of the converter C and further to bring the carriage 2 in the storage position, whereby a series of the slag cutting operations are completed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a slag cutting device that prevents slag from being mixed into an outflowing molten steel flow when molten steel is tapped from a converter.

Conventional slag cutting equipment with a structure in which a stopper support arm with a stopper at the tip extends into the converter is generally installed in the form of a jib crane, for example, on a column erected on the work floor in front of the converter. . In order to move the stopper support arm into and out of the converter, as well as raise and lower it, elevate it, and even swivel it, the support arm is pivoted or suspended by a necessary link mechanism, but the capacity and weight of the device must be large. Because of this, the structure of the link mechanism is limited and cannot have sufficient strength. This problem is also caused by the fact that the stopper support arm is moved back and forth, raised and lowered, elevated and rotated only by a series of link mechanisms.

In a slag cutting device with such a structure, when the stopper support arm is extended, an excessive force is applied to the arm holding part, and when other turning movements are added, an unbalanced load is applied to the arm holding part, that is, the column. In addition to being dangerous, there is also the drawback that the stopper support arm cannot be stably moved in various ways.

The present invention was created in order to solve the above-mentioned problems in conventional slag cutting equipment, and its purpose is to arrange a table that supports the main body of the slag cutting equipment so that it can move up and down in a fixed direction with respect to a cart. By doing so, it is an object of the present invention to provide a slag cutting device that can be operated stably without any unbalanced load being applied to the cart and table due to the telescopic movement of the stopper support arm.

The present invention enables a frame to be positioned on a horizontal floor in front of the converter mouth, and a table that moves up and down vertically while remaining parallel to the horizontal plane is installed in the frame, and This invention relates to a slag cutting device used in a converter or the like, which is provided with a rocking prevention mechanism to prevent rocking, and further has a slag cutting device main body attached to the same table so as to be movable forward and backward.

Hereinafter, a detailed description will be given based on the embodiments shown in the attached drawings. FIG. 1 shows a converter (C
) is shown in a side view when placed on the back side of the furnace, and FIG. 2 is a plan view of the same.

The slag cutting device (1) is a cart (
2) is attached in a suspended manner via a hydraulic cylinder (3) for lifting and lowering and a table (4) on the lower side of the trolley (2). In addition, in this embodiment, the frame (F) is placed vertically on an upper movable floor (M) equipped with wheels (K) that can be moved on the working floor (O) (or on the rails) on the back side of the hearth.
As shown in the figure, this upper movable floor (M) is connected to a wire rope (
When hooked to the hook (H) of a large traveling crane, etc. (not shown) installed near the converter (C) via the converter (W), both the slag cutting device (1) and the upper movable floor (M) are connected to the converter. (
C) can be moved or removed from the front. On the upper movable floor (M), there is a heat shield panel (P) of the required height on the converter (C) side.
Also, in one corner is a motor (Q) that rotates the wheel (K).
and an operation panel (S) for operating the motor.

The frame (F) is installed in the second frame, which is a plan view of FIG.
In the figure, a rail portion (5) with a required parallel spacing perpendicular to the axis of the converter (C) is formed, and the upper surface of the rail portion has a rectangular cross-sectional rail ( R) are integrally fixed.

FIG. 4 shows a side view showing how the cart (2) and the slag cutting device (1) are installed. By rolling the rails (R) on (F), it is possible to travel in a direction perpendicular to the axis of the converter (C), so that the cart (2) does not fall over when the slag cutting device (1) operates.
In order to prevent one side from floating up, a roller (7) is provided that partially contacts and rolls on the lower surface side of the component of the rail portion (5) of the frame (F).

A table (4) that tiltably directs the slag cutting device (1) is attached to the lower end of the cylinder rod (3a) of the hydraulic cylinder (3) vertically installed on the trolley (2) and the upper movable floor (M ), and according to the expansion and contraction of the cylinder rod (3a), the table (4) is connected to the trolley (2).
It can also move up and down vertically with respect to the upper movable floor (M). Two hydraulic cylinders (3) are spaced apart by a required distance so that they are positioned on the axis of a stopper support arm that is movably provided in the slag cutting device (1), which will be described later, or in other words, on the forward and backward direction of the arm. provided. moreover(
8) is on the line connecting the two hydraulic cylinders (3),
Two hollow cylindrical bodies are similarly installed vertically on the trolley (2) adjacent to each cylinder, and a guide rod (9) whose lower end is fixed to the table (4) is disposed within the cylindrical body. Fig. 5 shows a state in which a sliding ring (50) for guiding the guide rod (9) is provided on the truck (2), and this sliding ring (50) is attached to the main body of the truck (2). It is installed so that it penetrates in the vertical direction, and there are guide rods (9
) A sliding ring (51) is provided to support the peripheral surface. The cylindrical body (8) is connected to the upper part of this sliding ring (50), and the guide rod (9) can move up and down while being guided by the sliding ring (50) when the hydraulic cylinder (3) is operated. The guide rod (9) and the sliding ring body (50) constitute a rocking prevention mechanism (G) when the table (4) goes up and down. ) is up and down in the direction of the trolley (2) main body and the upper movable floor (
M), and in the direction perpendicular to slag cutting device (1)
The table (4) is always supported by the guide rod (9) without tilting even when an uneven load is applied to the table (4). It can be raised and lowered so as to move parallel to the trolley (2).

The slag cutting device (1) is rotatably supported midway by a pivot joint (10) on the lower side of the table (4), and also has a cylinder rod ( 12). The main body of the hydraulic cylinder (11) is fixed to the upper surface of the table (4), and the cylinder rod (12) passes through the insertion hole (4a) formed in the table (4) and cuts the slug through the lower surface of the table (4). It is connected to the device (1). By operating the hydraulic cylinder (11) and expanding and contracting the cylinder load (12) with the above configuration, the slag cutting device (1) can tilt about the pivot portion (10) as a pivot point.

In the following, referring to the slag cutting device (1), the device includes a stopper support arm (14) having a stopper (13) swingably suspended at its tip, and an arm guide tube ( 15), same arm guide tube (
15) An arm feeding mechanism (16) that is attached to the top and moves the stopper support arm (14) forward and backward into the converter (C).
It is composed of This arm feeding mechanism (16) is driven by a drive motor (1) attached to the upper surface of the arm guide tube (15).
7) as a driving source, pinions (18) disposed on both sides of the arm guide tube (15) are rotated by engagement of a worm wheel (not shown) and a worm (19) attached to the upper end of the shaft, The stopper support arm (14) can move forward and backward by meshing the pinion with racks (20) attached to both side walls of the stopper support arm (14).

The slag cutting operation by the slag cutting device (1) having the above configuration will be described below. First, the converter (C) starts tilting in the tapping direction, and at the same time, the cart (2) is moved to the storage position shown by the dashed line in Fig. 2. It is run from the position shown by the solid line in the same figure, that is, until the axis of the stopper support arm (14) and the axis of the converter (C) coincide and become coaxial, and is stopped and held at the same position. This positioning can be reliably performed by using a positioning hydraulic cylinder attached to the truck (2) and a positioning stopper (both not shown) provided on the rail (R) portion.

Next, the arm feeding mechanism (1
6) extends the stopper support arm (14), lowers the table (4) using the hydraulic cylinder (3), and lowers the slag cutting device (1) using the hydraulic cylinder (11).
That is, the slag cutting operation can be performed by appropriately tilting the stopper support arm (14) downward. Figure 6 shows that the table (4) is raised and the stopper support arm (14)
The table (4) is shown tilted downward, and as mentioned above, the table (4) is connected to the guide rod (9) and the sliding ring (2) of the carriage (2).
50), it is possible to vertically descend while moving parallel to the cart (2) and the upper movable floor (M), and there is no unnecessary rocking movement, and the cylinder of the hydraulic cylinder (3) The rod (3a) can also be extended smoothly. When the table (4) is lowered, the stopper support arm (14) is extended by the arm extension mechanism (16).
13) is relatively large, the table (4) receives an uneven load such that the load is applied to the side where the hydraulic cylinder (11) is attached in the figure. However, the table (4) is supported by the guide rod (9) on the trolley (2) in the direction in which the stopper support arm (14) extends, so that the table (4) does not tilt, and even if it receives an uneven load, the guide rod (9) supports the table (4), so no bending force is applied to the hydraulic cylinder (3) and its cylinder rod (3a), and the cylinder and rod will not break.

As described above, the hydraulic cylinder (3) can operate without any problem even when the stopper support arm (14) is extended, so the stopper (13) can be raised and lowered in the converter smoothly by raising and lowering the table (4). You can definitely do it.

After the work is completed, each hydraulic cylinder (3) (11) is operated to retract the cylinder rods (3a), (12), and the arm feeding mechanism (16) is reversed to move the stopper support arm (14) to the converter ( C) A series of slag cutting operations is completed by retreating from the inside and moving the trolley (2) further to bring it to the storage location shown in FIG. 2. ” In this embodiment, the trolley (2) runs on a frame (F) fixed on the upper movable floor (M).
For example, an overhead traveling crane or the like in front of the converter (C) may be used as a frame and similarly movable.

Furthermore, it is also possible to use a frame that is fixed to the ceiling or floor of the building. As described above, the slag cutting device according to the present invention has the following effects due to its configuration.

(1) Since the rocking prevention mechanism is provided, the table does not make unnecessary rocking movements when the table is raised and lowered, and stable and smooth raising and lowering movements can be performed.

Even if the table receives an uneven load, the rocking prevention mechanism can support the table so that it cannot tilt, so the elevating mechanism etc. will not be damaged.

[Brief explanation of drawings]

FIG. 1 is a side view showing the state in which the slag cutting device according to the present invention is installed on the back side of a converter, FIG. 2 is a plan view of the same, and FIG.
The figure is a side view showing the state in which the upper movable floor is suspended with wire ropes, and Figure 4 is a side view showing the main parts of the slag cutting device.
FIG. 5 is a partially cutaway front view of the rocking prevention mechanism, and FIG. 6 is a side view showing the stopper support arm extended into the converter and tilted downward. (1) Slag cutting device (2) Cart (4) Table (13) Stopper (14) Stopper support arm (C) Converter (F) Frame (G) Swing prevention mechanism (M) Upper movable ■

Claims (2)

[Claims] 1. The frame can be positioned on the horizontal floor in front of the converter mouth, and a table that moves up and down vertically while remaining parallel to the horizontal floor is installed within the frame, and the swinging that occurs when the table goes up and down is prevented. A slag cutting device for use in a converter, etc., characterized in that a slag cutting device is provided with an anti-swing mechanism to prevent swinging, and a slag cutting device main body is attached to the same table so as to be movable forward and backward. 2. Claim 1, wherein the table and the rocking prevention mechanism are attached to the frame via a truck that can run on the frame in a direction intersecting the axis of the converter.
A slag cutting device used in converters, etc., as described in Section 1.