JPH0715759U - Slag cutting device such as converter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a slag cutting device for use in a converter or the like, which can insert a slag occluder into a tap hole surely and quickly even when the tap hole is displaced. [Structure] The converter 1 is arranged adjacent to the converter 1, and when necessary, the converter 1
In the slag cutting device that inserts the slag occluder 13 into the tap hole 1a to block the outflow of slag, the rear end side of the elevation arm 4 is pivoted so that the tip can be vertically swung by the vertical swing mechanism 7. Support. The trolley 10 is installed by the contact / separation moving mechanism 11 so as to be movable toward and away from the converter 1 along the elevation arm 4. The arm 12 is fixed to the trolley 10, and the trolley 1
It is possible to move integrally with 0. An attachment / detachment mechanism 14 that detachably holds the slag occluder 13 by actuating a movable plate 16 disposed opposite to a fixed plate 15 provided at the tip of the arm 12 is incorporated in the arm 12. A plurality of grooves 15a and 16a parallel to the tilt axis of the converter 1 and perpendicular to the tap hole 1a are formed in the fixed and movable plates 15 and 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for inserting a occluder into a tap hole at the end of tapping of a converter to prevent slag from flowing into the molten steel already discharged from the tap hole.

[0002]

[Prior art]

 A conventional structure of this type of slag cutting device is a structure in which a telescopic arm having a slug occluder suspended in a swing manner, which is disclosed in JP-A-57-19315, is provided adjacent to a converter. The slag cutting device disclosed in Japanese Laid-Open Patent Publication No. 57-19315 is mounted on a moving carriage to secure a working space around the converter (Japanese Laid-Open Patent Publication No. 59-53614), or detachable. A structure in which a slag occluder is held by a telescopic arm and the slag occluder can be inserted into the tap hole (Japanese Patent Publication No. 2-9642).

[0003]

[Problems to be solved by the device]

 By the way, in order to reliably prevent the discharge of slag after the molten steel is tapped from the converter, it is necessary to insert the slag blocker into the tapped mouth of the converter surely and promptly. No. 19315 and Japanese Patent Laid-Open No. 59-53614, the device having a structure in which the insertion of the slag occluder into the tap hole depends on the flow of molten steel or slag near the tap port to some extent Among the molten steel and slag flowing toward the steel mouth, there is a problem in that it is less reliable to reliably position the slag occluder at the tap hole.

The device proposed in Japanese Examined Patent Publication No. 2-9642 is theoretically excellent in that the slag occluder is aligned with the tap hole, but the slag occluder is placed inside the tap port. When inserting, there is molten steel or slag above the tap hole, so the operator must operate this device by aiming at the tap hole below the tap or slag. It is not possible to reliably position or insert the slag occluder.

Furthermore, since the sleeve inside the tap hole is melted by the influence of heat, it is necessary to replace the sleeve. This sleeve replacement work involves re-drilling the hole with a drill and inserting the sleeve. It is to pour refractory into. Therefore, the position of the tap hole is not always fixed.

The present invention has been made in view of the above-mentioned problems, and is intended for a converter or the like that can reliably and quickly insert the slag blocker into the tap hole even when the position of the tap hole is displaced. The purpose is to provide a slag cutting device to be used.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the slag cutting device of the present invention, such as a converter, is arranged adjacent to the converter, etc., and a slag occluder is inserted into the tap hole of the converter, etc., when necessary. In a slag cutting device that blocks the outflow of water, a rising and lowering arm that pivotally supports the rear end side so that the tip can swing up and down, a vertical swinging mechanism of this rising and lowering arm, and a converter that is guided by the rising and lowering arm. And a moving mechanism for moving the carriage, an arm fixed to the carriage to move integrally with the carriage, a fixing plate provided at a tip of the arm, and an inside of the arm. And a detachable mechanism that detachably holds the slug occluder by moving the movable plate facing the fixed plate to and away from the fixed plate, and the opposite faces of the fixed plate and the movable plate. of It is to form a vertical plurality of grooves parallel to and tapped hole in the tilting axis of the converter in either one even without.

[0008]

[Action]

 The slag cutting device of the present invention, such as a converter, has an arm integrated with a trolley that can be moved toward and away from the converter by being guided by a lifting arm that pivotally supports the rear end so that the tip can swing vertically. The arm is equipped with a detaching mechanism that detachably holds the slag occluder by moving the fixed plate provided at the tip of the arm and the movable plate facing the fixed plate in a detachable manner. Therefore, if you set the vertical swing angle of the elevation arm and the amount of movement of the carriage to and from the trolley in advance according to the converter in which the slag blocker is inserted, etc. If the holding of the slag occluder is released after moving and moving, the slag occluder can be surely inserted into the tap hole. Since the fixed and movable plates are arranged, and the arm is equipped with an attachment / detachment mechanism, the attachment / detachment mechanism operates the movable plate to detachably hold the slag blocker. Even if the tap hole is displaced in the same direction, the fixed and movable plates can be held at different positions depending on the amount of the shift so that the slag occluder can be reliably inserted into the tap port.

Further, since a plurality of vertical grooves parallel to the tilting axis of the converter are formed on at least one of the facing surfaces of the fixed plate and the movable plate, the protrusions in the tilting axis direction of the converter are formed. Even if the steel mouth is displaced, the fixed and movable plates can hold the slag occluder by changing the holding position according to the amount of the deviation. Further, since the plurality of grooves are formed so as to be perpendicular to the tap hole, the slag occluder is held along the grooves and the posture is not changed during the transportation of the slag occluder.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is an overall schematic front view of the slag cutting device of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a partial side view of FIG. 1, and FIG. 4 is a schematic explanatory view of an attachment / detachment mechanism of an arm and a slag occluder. 5 is a detailed view of the guide portion and the elevation arm and the tip of the arm when the elevation arm swings up and down, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is the rear end portion of the elevation arm and the positional relationship between the carriage and the arm. FIG. 8 is a detailed view, FIG. 8 is a plan view of FIG. 7, and FIG. 9 is a detailed view of the attachment / detachment portion of the slag occluder in the slag cutting device of the present invention.

In the drawings, 1 is a converter, 2 is a backside work floor of the converter 1, 3 is a backside heat insulating door, and the slag cutting device of the present invention is, for example, a backside work floor laid out in this way. It will be installed in the converter building constructed in 2.

Reference numeral 4 denotes a lifting arm, which is pivotally supported at its rear end by a pivot 5a rotatably supported by a bearing 5 installed in the converter building and installed on an upper floor 6 of the converter building. The vertical swinging mechanism 7 can swing vertically with the pivot 5a as a fulcrum.

By the way, the structure of the vertical swing mechanism 7 is not limited as long as it can swing the tip of the elevation arm 4 in the vertical direction by a required angle, but in the present embodiment, it is installed on the upper floor 6. The figure shows that the wire rope 7b wound around the winding drum of the winch 7a is swung up and down to swing up and down. Further, in this embodiment, in order to prevent the horizontal motion of the elevation arm 4 when vertically swinging, as shown in FIGS. 5 and 6, the guide plate 8 is erected on the structure 6a suspended from the upper floor 6. In addition, a guide roller 9 is pivotally supported at a position of the elevation arm 4 facing the guide plate 8. Reference numeral 7c indicates a wire sheave for changing the direction of the wire rope 7b, and reference numeral 7d indicates a rotational speed detector for detecting the final movement amount of the wire rope 7b [the swing angle of the elevation arm 4].

Reference numeral 10 denotes a dolly which is guided by a rail laid on the elevation arm 4 to move toward and away from the converter 1. In the present embodiment, the dolly is designed so that the contacting and moving can be performed smoothly and with high accuracy. The LM guide 10 a is installed on the No. 10. In this embodiment, an AC servomotor 11a is arranged on the rear end side of the elevation arm 4 and is attached to the output shaft of the carriage 10 as the contact / separation moving mechanism 11 of the carriage 10, as shown in FIGS. By rotating the chain drive sheave 11b in the forward and reverse directions, the driven chain 11c and the driven sheave 11e and the index chain drive sheave 11f arranged coaxially with the driven sheave 11e are rotated forward and backward by the drive chain 11c that meshes with the chain. One end of an index chain 11g that meshes with the index chain drive sheave 11f is at a required position of the carriage 10, and the other end is a direction changing sheave 11h installed at the tip side of the elevation arm 4 as shown in FIG. The carriage 10 is attached to a position in front of the position where the one end is attached.

Reference numeral 12 denotes an arm fixed to the trolley 10 so as to be integrated with the trolley 10, and a slag occluder that is inserted into the steel tap 1a of the converter 1 at its tip and closes the tap 1a 13 is attached. By the way, in the slag cutting device of the present invention, the attachment / detachment mechanism 14 of the slag occluder 13 is attached to the arm 12 so that the slag occluder 13 can be attached and detached from the tip of the arm 12.

As shown in FIG. 6, the attachment / detachment mechanism 14 has an air cylinder 14a inside the rear end of the arm 12, a tube 14b is attached to the rod of the air cylinder 14a, and the rod of the air cylinder 14a is retracted. By moving the pipe 14b relative to the arm 12, the slag occluder 13 is attached and detached.

The attachment / detachment portion of the slag occluder 13 provided at the tip of the arm 12 is composed of a fixed plate 15 fixed to the tip of the arm 12 and a movable plate 16 attached to the tip of the pipe 14b. The movable plates 15, 16 are formed with seven semicircular grooves 15a, 16a parallel to the tilt axis of the converter 1 and perpendicular to the tap hole 1a so as to face each other. In addition, a long hole 17a into which the core rod 13a of the slag occluder 13 can be inserted is fixed to the connecting plate 17 that connects the pipe 14b and the movable plate 16, and the groove 15a, which is located at the center of the movable plates 15 and 16, 16a, the fixing plate 15 is provided with a through hole 15b through which the connecting plate 17 is inserted.

That is, the movable plate 16 is moved relative to the arm 12 via the tube 14b by the withdrawal / retraction of the rod of the air cylinder 14a, and the grooves 15a and 16a provided in the fixed plate 15 and the movable plate 16 are moved. And hold the core bar 13a of the slag occluder 13 in a clamped manner or remove it.

Further, in order to hold the core rod 13a of the slag occluder 13 by the fixed and movable plates 15 and 16, the slag is closed by the grooves 15a and 16a which are located away from the centers of the arm 12 and the pipe 14b. When the core rod 13a of the container 13 is clamped, the movable plate 16 tilts with respect to the fixed plate 15 as shown in FIG. 10, and the force for clamping the core rod 13a of the slag occluder 13 is weakened. In this case, as shown in FIG. 11, a dummy core rod 18 having the same diameter as the core rod 13a of the slag occluder 13 is provided in the grooves 15a and 16a which are symmetrical with respect to the centers of the arm 12 and the pipe 14b. When sandwiched together, the inclination of the movable plate 16 is corrected to sandwich the core rod 13a, and the fixed plate 15 and the movable plate 16 can securely sandwich the core rod 13a of the slag occluder 13.

The slag cutting device of the present invention is configured as described above, and next, the order of closing the tap hole 1a of the converter 1 will be described. Normally, the tap hole 1a of the converter 1 is repaired according to the melting damage condition. Further, the lining bricks of the converter 1 gradually decrease in thickness due to melting loss. That is, the position of the tap hole 1a of the converter 1 changes every moment.

The position of the tap hole 1a and the slag cutting device of the present invention are preliminarily determined by the number of charges within the number of charges that exceeds the allowable size deviation from the position of the tap port 1a obtained from the stop position accuracy range of the present invention slag cutting device. In other words, the empty converter 1 without molten steel or slag is tilted, and the slag occluder 13 is inserted and set in the tap hole 1a using the device of the present invention.

Then, the position of the device of the present invention at that time, that is, the swing position of the elevation arm 4 is read from the rotation number detector 7d, and the moving distance of the carriage 10 is built in the AC servomotor 11a. Read from the pulse data stored and input these values to the sequencer CPU. Other data such as the attachment / detachment position of the slag occluder 13, the normal standby position, the passage position of the furnace back heat insulating door 3 and the like are unchanged, so these data are initially input to the sequencer CPU in advance.

When the above preparations are completed, the operator causes the rod of the air cylinder 14a to move out and arrange it between the fixed and movable plates 15 and 16, and then retracts the rod of the air cylinder 14a to cause the slag. The core rod 13a of the occluder 13 is held in a clamped state, and thereafter, a normal converter tapping operation is performed.

Then, at the end of tapping and at the timing of slag cutting, the arm 12 is moved based on the data previously input to the sequencer CPU, and the elevation arm 4 is lowered and swung to slag. The occluder 13 is inserted into the tap hole 1a, and then the rod of the air cylinder 14a is moved out to remove the slag occluder 13, and the elevation arm 4 and the arm 12 are returned to their original positions and stand by.

When the position for holding the slag occluder 13 on the fixed and movable plates 15 and 16 is far from the center of the arm 12, the steel outlet 1a can be visually inspected when the refractory is repaired. The displacement amount of 1a is measured in advance, the dummy core rod 18 is attached to the fixed plate 15, and then the device is operated.

FIG. 12 shows the success rate of inserting the slag occluder 13 into the tap hole 1a when the device of the present invention is used and when the comparison device that supports the slag occluder 13 at one point is used. From FIG. 12, the success rate of inserting the slag occluder 13 into the tap hole 1a was about 40% when the comparative device was used, but about 95% when the device of the present invention was used. %, The insertion success rate is significantly improved.

In the present embodiment, the semicircular grooves 15a and 16a are formed in the fixed and movable plates 15 and 16, but trapezoidal or sawtooth grooves may be used. Further, in this embodiment, the grooves 15a and 16a are formed on both the fixed and movable plates 15 and 16, but the groove may be formed only on one of the fixed plate 15 and the movable plate 16. .

[0028]

[Effect of device]

 As described above, according to the slag cutting device of the present invention, the slag occluder can be held in response to the movement of the tap hole, and even when the slag occluder is being conveyed into the furnace, the vibration can be prevented. Since the posture does not change even when affected by such factors, only the slag occluder can be reliably and quickly inserted into the tap hole.

[Brief description of drawings]

1 is an overall schematic front view of a slag cutting device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial side view of FIG.

FIG. 4 is a schematic explanatory view of an attachment / detachment mechanism of an arm and a slag occluder.

FIG. 5 is a detailed view of a guide portion when the elevation arm swings up and down, and the elevation arm and a tip portion of the arm.

FIG. 6 is a plan view of FIG.

FIG. 7 is a detailed view of the positional relationship between the rear end of the elevation arm and the carriage / arm.

FIG. 8 is a plan view of FIG.

FIG. 9 is a detailed view of the attachment / detachment portion of the slag occluder in the slag cutting device of the present invention.

FIG. 10 is a view showing a state in which the core rod of the slag occluder is held at a position apart from the center of the arm.

FIG. 11 is a view showing a state in which a dummy core rod is attached and the core rod of the slag occluder is held, (a) is a plan view,
(B) is a front view.

FIG. 12 is a diagram showing the success rate of inserting the slag occluder into the tap hole when the device of the present invention is used and when the comparison device that supports the slag occluder at one point is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Converter 1a Steel tapping port 4 Elevation arm 7 Vertical swing mechanism 10 Truck 11 Contact / separation movement mechanism 12 Arm 13 Slug occluder 14 Attachment / detachment mechanism 15 Fixed plate 16 Movable plate 18 Dummy core rod

Claims (1)

[Scope of utility model registration request] 1. A slag cutting device which is disposed adjacent to a converter or the like, and which inserts a slag blocker into a tap hole of the converter or the like to block the outflow of slag when necessary, so that the tip can be vertically swung. And a vertically swinging mechanism for the elevation arm, the rear end side of which is axially supported, a bogie that can be moved toward and away from the converter and the like by being guided by the elevation arm, and a contact / separation mechanism for the bogie. An arm that is fixed to the trolley and moves integrally with the trolley, a fixed plate that is provided at the tip of the arm, and a movable plate that is provided inside the arm and that faces the fixed plate. A detachable mechanism for detachably holding the slag occluder by detaching and holding the slag occluder, and at least one of the facing surfaces of the fixed plate and the movable plate is parallel to the tilt axis of the converter and Vertical to the mouth A slag cutting device for a converter, etc., which has a plurality of different grooves formed therein.