JP2930882B2 - Tuyere suspension device and its operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically removes molten steel and mortar adhering to the inner surface of a tuyere from which the upper nozzle of the ladle and the tundish is removed when the refractory of the ladle and the tundish is replaced. The tuyere for removing and shaping the tuyere relates to a suspension device and an operation method thereof.

[0002]

2. Description of the Related Art Conventionally, generally, molten steel in a ladle is poured into a tundish through a ladle nozzle while the flow rate is controlled by relatively moving a fixed plate and a sliding plate of a flow control device. Can come off. Then, the molten steel poured into the tundish is further supplied to the mold via a refractory of a flow control device mounted on the bottom of the tundish. By the way, refractories are used in severe conditions such as flowing molten steel, so that they are easily eroded and easily damaged. Further, the refractory is also limited in terms of its material, so that its service life is short. Therefore, it is necessary to frequently replace the refractory. This replacement of the refractory can be shortened when the ladle and tundish are to be used between continuous heats without cooling the ladle and tundish without repairing the refractory inside the ladle and tundish. In order to improve the usage efficiency, the operator manually removes the refractory directly from the hot ladle and the tundish without replacing the flow control device from the ladle and the tundish, and replaces it with a new refractory. And, as work associated with such refractory replacement, remove the molten steel and mortar attached to the inner surface of the tuyere from which the upper nozzle was removed,
There is work to shape tuyeres.

[0003]

In the method of directly exchanging refractories, when exchanging refractories of a hot ladle and a tundish, heat and gas, etc. from the ladle and the tundish flow out of the ladle and the tundish. There is a problem in that the gas is ejected from the hole and the working environment is deteriorated, and the operation of the operator involves danger. Therefore, in order to prevent heat and gas from being ejected from the fluid outlets of the ladle and the tundish, it is conceivable to replace the refractory after lowering the temperature of the ladle and the tundish. However, once the temperature of the ladle and the tundish is lowered, it takes time to raise the temperature of the ladle and the tundish again, and there is a problem that work in a continuous hot state cannot be performed and workability is reduced. . And
As work involved in refractory replacement, remove the molten steel and mortar attached to the inner surface of the tuyere from which the upper nozzle was removed,
There is work to shape the tuyere, but heat, gas, dust, etc. from inside the ladle and tundish squirt from the tuyere hole from which the upper nozzle was removed from the ladle and tundish, deteriorating the working environment and dangerous to the operator's work. There was a problem that accompanied.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a tuyere can be cleaned by a mechanical operation safely, reliably, and in a short time without damaging the tuyere. It is an object of the present invention to provide an apparatus and a method of operating the same.

[0005]

In order to solve the above-mentioned problems, a tuyere suspension device according to claim 1 is a tuyere suspension device which removes an upper nozzle of a refractory of a ladle and a tundish and removes an inner surface of the tuyere. A tool for removing the molten steel and mortar attached to the inner surface of the tuyere, which is attached to the tip of the breaker and driven by the breaker, and a tool for removing the suspending tool and the inclination in the depth direction of the tuyere. The gist is to have reciprocating means for reciprocating in the same inclination direction and revolving means for revolving the breaker, hanging tool and reciprocating means integrally in the circumferential direction of the tuyere inner surface.

According to a second aspect of the present invention, there is provided the tuyere suspension device according to the first aspect, wherein the reciprocating means is attached at substantially the same inclination as the inclination of the tuyere in the depth direction. The gist is that it is either the air cylinder or the hydraulic cylinder.

According to a third aspect of the present invention, there is provided the tuyere suspension device according to the first aspect, wherein the breaker is provided on a suspension trolley, and between the rear end of the breaker and the suspension trolley. The gist of the invention is that any one of a second air cylinder and a hydraulic cylinder that presses the hanging tool against the inner surface of the tuyere with a constant force is attached.

According to a fourth aspect of the present invention, in the tuyere hanging device according to the first aspect, the tip of the hanging tool is formed in an arc shape substantially the same as the circumferential shape of the inner surface of the tuyere. The gist is to do it.

According to a fifth aspect of the present invention, there is provided the tuyere suspension device according to the first aspect, wherein the revolving means is constituted by a motor having a revolving positioning mechanism.

According to a sixth aspect of the present invention, there is provided the tuyere suspension device according to the first aspect, wherein a compliance mechanism for reducing a reaction force from the breaker is provided on the back side of the breaker. Is the gist.

According to a seventh aspect of the present invention, there is provided a method for operating a tuyere hanging apparatus according to the first aspect, wherein the tuyere is suspended by operating the breaker and the reciprocating means. The inner surface of the mouth is suspended from the tuyere front end to the tuyere end, then the breaker is inoperative and the reciprocating means retreats the hanging tool to the tuyere front end, and then the revolving means is rotated by a predetermined angle. Position, and the breaker and the reciprocating means are operated again to suspend the tuyere inner surface to the tuyere end with the suspending tool,
The gist of the present invention is to repeat the above-described operations so as to cover the entire inner circumference of the tuyere.

[0012]

In the tuyere lifting device according to the first aspect, the lifting tool driven by the breaker moves forward from the tuyere front end to the tuyere end by reciprocating means while pulling the tuyere inner surface, and then the breaker is in a non-operation state. To retreat to the front end of the tuyere. At the tuyere front end position, it is rotated and positioned by a predetermined angle by the revolving means, and the hanging tool driven by the breaker again moves forward from the tuyere front end to the tuyere end by the reciprocating means while piercing the tuyere inner surface. By repeating each of the above operations, the molten steel, mortar and the upper nozzle that could not be removed when removing the upper nozzle from the inner surface of the tuyere from which the upper nozzle of the refractory of the ladle and tundish was removed The debris and the like are removed without waste in the hot state, and the tuyere is automatically cleaned in a short time.

[0013] In the tuyere-stripping device according to the second aspect of the present invention, an air or hydraulic cylinder attached at substantially the same inclination as the depth of the tuyere is used as the reciprocating means, and the suspension tool is inclined at the inner surface of the tuyere. By operating in the direction, the extra force from the breaker is not transmitted to the tuyere, and the inner surface of the tuyere is hung without damaging the tuyere shape.

According to a third aspect of the present invention, in the tuyere lifting device, an air or hydraulic cylinder for pressing the lifting tool against the inner surface of the tuyere with a constant force is attached between the rear end of the breaker and the lifting bogie. Moves forward without separating from the inner surface of the tuyere, and the inner surface of the tuyere is reliably removed.

According to a fourth aspect of the present invention, in the tuyere lifting device, the tip of the lifting tool is formed in an arc shape substantially the same as the circumferential shape of the inner surface of the tuyere. The tuyere is suspended without force being concentrated on one point and without damaging the inner surface of the tuyere.

In the tuyere lifting device according to the fifth aspect, by using a motor provided with a revolving positioning mechanism as the revolving means, the breaker, the lifting tool and the reciprocating means are integrally formed in the circumferential direction of the inner surface of the tuyere. The orbit can be easily revolved and the entire circumference of the inner surface of the tuyere can be reliably secured.

In the tuyere suspension device according to the sixth aspect of the present invention, the compliance mechanism for reducing the reaction force from the breaker is provided on the back side of the breaker, so that the reaction force from the breaker is not transmitted to the robot arm or the like and is stabilized. The inside of the tuyere is suspended.

In the operating method of the tuyere lifting device according to the present invention, the breaker drives the lifting tool to peel off the inner surface of the tuyere when the reciprocating means advances the lifting tool, and the lifting tool retreats and the tuyere front end. When the revolving means is at the position, the revolving means revolves the hanging tool or the like by a predetermined angle, and by repeating each of these operations, it is possible to automatically remove the entire circumference of the inner surface of the tuyere in a short time.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an entire configuration of a tuyere hanging tool as a tuyere hanging device, and particularly, a revolving means is shown in a cross section. FIG. 2 is a configuration diagram showing the entire configuration of the tuyere hanging tool, and FIG. 3 is an enlarged view of the hanging tool portion.

First, the entire structure of a tuyere suspension device will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes a tuyere, 2 denotes a stopper for inserting a hanging tool, and the tuyere 1 is provided with a stopper 2 for inserting a hanging tool, and the tuyere positions a hanging device. A hanging tool 3 for hanging and shaping the inner surface of the tuyere 1 is attached to a tip of a driving breaker 4, and the breaker 4 is fixed to an inner ring 28. The inner ring 28 is fixed to a suspension trolley arm (outer ring) 30 via a bearing 29, and the air or hydraulic cylinder mounting bracket 31 is used as a fulcrum with the suspension trolley arm 30 as a fulcrum, and the air attached to the suspension trolley 5. Alternatively, the hanging tool 3 is pressed against the inner surface of the tuyere 1 with a constant force by the second air or the hydraulic cylinder 32 via the hydraulic cylinder mounting block 33. The lifting cart 5 is connected to the linear guide 6 and is operated obliquely in the front-rear direction by the first air or hydraulic cylinder 7 along the shape of the tuyere 1 in the depth direction. The air or hydraulic cylinder mounting block 8 is connected to an air or hydraulic cylinder mounting block 8, and the air or hydraulic cylinder mounting block 8 is connected to a mounting disk 11 via a mounting base 9. The linear guide 6 is fixed to a mounting table 9, and the mounting table 9 is fixed to a mounting disk 11.
The mounting disk 11 is fixed to an inner ring 12, and the inner ring 12 is supported on an outer ring 14 via a bearing 13. The inner ring 12 is fixed to a revolving external gear 15,
Although not shown, the revolving external gear 15 meshes with a motor-side gear having a revolving positioning mechanism, and the motor-side gear having the revolving positioning mechanism is connected to a motor 19 having a revolving positioning mechanism. . The motor 19 is supported on a housing 17 via a bearing 16 and has a positioning mechanism.
8 fixed.

As the compliance mechanism 20, the outer ring 1
A bolt 23, a compliance spring 22, and a nut 21 are connected to several points between the base 4 and the base 4. The bolt 23 is fixed to the outer ring 14, and the base portion 24 is provided with a through hole larger than the outer diameter of the bolt 23,
It can handle misalignments in various directions. The mounting disk 11 fixed to the inner ring 12 revolves with the mounting table 9 and the breaker 4 supported by the connecting plate 10. The base part 24 is a tuyere hanging tool side ATC 25a.
The tuyere 1 is connected to the robot-side ATC 25b when performing the hanging operation. Robot side ATC
25b is fixed to the robot arm 26. As shown in FIG. 3, the tip of the hanging tool 3 has the same arc shape as the circumferential shape of the inner surface of the tuyere 1.

Next, the construction and operation of the embodiment according to each claim will be described in order.

An embodiment according to the first aspect will be described. A stopper 2 for inserting a hanging tool is applied to the tuyere 1, and the tuyere positions the hanging device. A suspending tool 3 for suspending and shaping the inner surface of the tuyere 1 has a breaker 4 for driving the same.
It is attached to the tip of. Breaker 4 has inner ring 28
Trolley arm (outer ring)
30. The drop cart 5 is connected to a linear guide 6. The lifting cart 5, and thus the lifting tool 3, is operated obliquely in the front-rear direction along the shape of the tuyere 1 by the first air or hydraulic cylinder 7 as reciprocating means. The first air or hydraulic cylinder mounting block 8 is connected to an air or hydraulic cylinder mounting block 8.
It is connected to a mounting disk 11 via a mounting base 9. The mounting disk 11 is fixed to an inner ring 12, and the inner ring 12 is supported on an outer ring 14 via a bearing 13. The inner ring 12 is fixed to a revolving external gear 15,
Although not shown, the revolving external gear 15 meshes with a motor-side gear having a revolving positioning mechanism, and the motor-side gear having the revolving positioning mechanism is a motor having a revolving positioning mechanism serving as revolving means. 19 is connected. The motor 19 is supported by a housing 17 via a bearing 16 and is fixed by a motor mounting block 18 having a positioning mechanism. Motor 1
9 as a drive source, the breaker 4, the hanging tool 3 and the first
Tuyere 1 with the air or hydraulic cylinder 7
Revolves in the circumferential direction of the inner surface. As described above, according to the present embodiment, the molten steel, mortar and the upper nozzle attached to the inner surface of the tuyere 1 from which the upper nozzle of the refractory of the ladle and the tundish was removed could not be removed when the upper nozzle was removed. It is possible to automatically suspend and clean the nozzle fragments and the like in a hot state.

An embodiment according to claim 2 will be described. A breaker 4 with a hanging tool 3 attached to the tip is an inner ring 2
8, bearing 29 and hanging trolley arm (outer ring) 30
Are attached to the suspension trolley 5 through the trolley. The hanging carriage 5 is attached to a linear guide 6, and the hanging carriage 5, that is, the hanging tool 3, is provided with a first reciprocating means.
The air or hydraulic cylinder 7 operates obliquely forward and backward along the inclination of the inner surface of the tuyere 1. As described above, according to the present embodiment, the first air or hydraulic cylinder 7 attached at the same inclination in the depth direction of the tuyere 1 from which the upper nozzle has been removed is used, and the hanging tool 3 is used as the tuyere. By operating the inner surface of the tuyere 1 in the inclination direction, the extra force from the breaker 4 is not transmitted to the tuyere 1, and the inner surface of the tuyere 1 can be detached without damaging the shape of the tuyere 1.

An embodiment according to claim 3 will be described. A hanging tool 3 for hanging and shaping the inner surface of the tuyere 1 is attached to the tip of a breaker 4. The breaker 4 is fixed to an inner race 28, and the inner race 28 is fixed to a suspension cart arm (outer race) 30 via a bearing 29.
The second air or hydraulic cylinder 32 is attached to the suspension truck 5 via the air or hydraulic cylinder mounting block 33 with the suspension truck arm 30 as a fulcrum and the air or hydraulic cylinder mounting bracket 31 as an operating point.
Thus, the hanging tool 3 is pressed against the inner surface of the tuyere 1 with a constant force. As described above, according to the present embodiment, the second air or hydraulic cylinder 32 attached between the rear end of the breaker 4 and the suspension truck 5 is used so as to cancel the own weight of the breaker 4, The hanging tool 3 is pressed against the inner surface of the tuyere 1 with a constant force, so that the hanging tool 3 can be prevented from separating from the inner surface of the tuyere 1.

An embodiment according to claim 4 will be described. As shown in FIG. 3, the tip of the hanging tool 3 has the same arc shape as the circumferential shape of the inner surface of the tuyere 1. As described above, according to the present embodiment, since the tip of the hanging tool 3 attached to the tip of the breaker 4 has the same arc shape as the circumferential shape of the inner surface of the tuyere 1, the force does not concentrate at one point. The tuyere 1 can be attached without damaging the inner surface.

An embodiment according to claim 5 will be described. Inner ring 28, bearing 29 and suspension trolley arm (outer ring)
The beam carrier 5 on which the breaker 4 is mounted is fixed to the linear guide 6 via 30. Furthermore, the linear guide 6
Is fixed to a mounting table 9, and the mounting table 9 is connected to a mounting disk 11. The mounting disk 11 is fixed to the inner ring 12, and the inner ring 12 is
4 is supported. The inner ring 12 is the revolving external gear 1.
5, the revolving external gear 15 is meshed with a motor-side gear (not shown) provided with a revolving positioning mechanism, and the motor-side gear is provided with a motor 19 having a revolving positioning mechanism serving as revolving means. It is connected to the. The motor 19 is supported by a housing 17 via a bearing 16 and is fixed by a motor mounting block 18 having a positioning mechanism. As described above, according to the present embodiment, the entire circumference of the inner surface of the tuyere 1 can be automatically formed by the revolving means.

An embodiment according to claim 6 will be described. As the compliance mechanism 20, the outer ring 14 and the base 2
The bolt 23, the compliance spring 22, and the nut 21 are connected to several points between the positions 4. Bolt 23
Is fixed to the outer ring 14, and a through-hole larger than the outer diameter of the bolt 23 is formed in the base portion 24 so that misalignment in various directions can be handled. As described above, according to the present embodiment, the compliance mechanism 20
And the reaction force from breaker 4 is applied to robot arm 2
6 can be prevented from being transmitted.

An embodiment according to claim 7 will be described. The breaker 4 is operated, the first air or hydraulic cylinder 7 is used as a reciprocating means attached at the same inclination as the depth of the tuyere 1 from which the upper nozzle is removed, and the lifting tool 3 is used as the tuyere. 1 Operate in the direction of inclination of the inner surface, and tuyere 1
Attach the inner surface to the end. Next, the breaker 4 is deactivated and the hanging tool 3 is retracted to the original position in the first air or hydraulic cylinder 7. Then, the motor 19 provided with a positioning mechanism as a revolving means is rotated by a certain angle to perform positioning, and the breaker 4 and the first air or hydraulic cylinder 7 are operated again to remove the suspension tool 3.
The inner surface is hung up to the end of the tuyere. By repeating this operation, it is possible to automatically attach the inner surface of the tuyere 1 over the entire circumference.

[0030]

As described above, according to the tuyere suspension device according to the first aspect, the tuyere is a suspension device which removes the upper nozzle of the refractory of the ladle and the tundish and removes the inner surface of the tuyere. A tool for removing molten steel and mortar attached to the inner surface of the tuyere, which is attached to the tip of the breaker and driven by the breaker, and dispensing the suspending tool in the same inclination direction as the inclination in the depth direction of the tuyere. Since the reciprocating means for reciprocating and the revolving means for revolving the breaker, the hanging tool and the reciprocating means integrally in the circumferential direction of the tuyere inner surface are provided, cleaning of the tuyere in a hot state by a mechanical operation. Can be performed safely, reliably and in a short time without damaging the tuyere.

According to the second to sixth aspects of the present invention, the following effects are further obtained in addition to the effects of the first aspect of the present invention.

According to the tuyere of the second aspect, according to the suspension device,
Since the reciprocating means is either the first air cylinder or the hydraulic cylinder mounted at substantially the same inclination as that of the tuyere in the depth direction, excess force from the breaker is not transmitted to the tuyere, Does not impair the mouth shape.

According to the tuyere of the third aspect, the tuyere is
The breaker is provided on a suspension trolley, and between the rear end of the breaker and the suspension trolley, a second air cylinder or a hydraulic cylinder for pressing the suspension tool against the inner surface of the tuyere with a constant force. Since either of them is attached, the lifting tool can move forward without separating from the inner surface of the tuyere and can more reliably detach the inner surface of the tuyere.

According to the tuyere of the fourth aspect, according to the suspension device,
Since the tip of the hanging tool is formed in the same arc shape as the circumferential shape of the inner surface of the tuyere, the force of the tip of the hanging tool does not concentrate on one point on the inner surface of the tuyere. The tuyere inner surface can be attached without damaging it.

According to a fifth aspect of the present invention, the tuyere is provided by a suspension device.
Since the revolving means is constituted by a motor provided with a revolving positioning mechanism, the breaker, the hanging tool and the reciprocating means can be easily revolved in the circumferential direction of the inner surface of the tuyere as a unit.

According to a sixth aspect of the present invention, the tuyere is provided with a suspension device.
Since the compliance mechanism for reducing the reaction force from the breaker is provided on the rear side of the breaker, the reaction force from the breaker is not transmitted to the robot arm or the like, and the tuyere inner surface can be stably attached.

According to a seventh aspect of the present invention, there is provided a method of operating a tuyere hanging apparatus, wherein the tuyere is operated by the breaker and the reciprocating means so that the tug is used by the hanging tool. The tuyere inner surface is suspended from the tuyere front end to the tuyere end, then the breaker is inoperative and the reciprocating means retreats the hanging tool to the tuyere front end, and then the revolving means rotates by a predetermined angle. Then, the breaker and the reciprocating means are operated again to suspend the tuyere inner surface to the tuyere end with the lifting tool, and by repeating the above operations, the tuyere inner surface is completely covered. Therefore, the tuyere in the hot state can be cleaned safely, reliably and automatically in a short time without damaging the tuyere.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a partial cross section of an embodiment of a tuyere suspension device according to the present invention.

FIG. 2 is a configuration diagram of the embodiment.

FIG. 3 is an enlarged perspective view of a hanging tool part in the embodiment.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 tuyere 3 is a suspension tool 4 breaker 5 is suspension truck 7 first air or hydraulic cylinder (reciprocating means) 19 motor with revolving positioning mechanism (revolving means) 20 compliance mechanism 32 second air or hydraulic cylinder

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Kawahito 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries Co., Ltd. Inside Wakayama Works (72) Inventor Yoshiyoshi Kobayashi 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Fuchu Plant (56) References JP-A-7-256440 (JP, A) JP-A-6-154966 (JP, A) JP-A-6-63730 (JP, A) JP-A-53-86641 (JP, A) JP-A-6-35900 (JP, U) JP-A-2-32361 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) B22D 41/02 B22D 41/08 B22D 43/00

Claims (7)

(57) [Claims] 1. A tuyere that is attached to the tip of a breaker and is driven by the breaker to attach to the inner surface of the tuyere. A repelling tool that reciprocates the molten steel, mortar, etc., and the reciprocating motion of the repelling tool in the same inclination direction as the inclination of the tuyere in the depth direction; and the breaker, the repelling tool, and the reciprocating device. And a revolving means for revolving in the circumferential direction of the inner surface of the tuyere. 2. The reciprocating means is one of a first air cylinder and a hydraulic cylinder mounted at substantially the same inclination as that of the tuyere in the depth direction. The tuyere is a suspension device. 3. The breaker is provided on a suspension trolley, and between the rear end of the breaker and the suspension trolley, a second air for pressing the suspension tool against the inner surface of the tuyere with a constant force. The tuyere suspension device according to claim 1, wherein one of a cylinder and a hydraulic cylinder is attached. 4. The tuyere hanging device according to claim 1, wherein a tip portion of the hanging tool is formed in an arc shape substantially the same as a circumferential shape of the inner surface of the tuyere. 5. The revolving means comprises a motor having a revolving positioning mechanism.
The tuyere described is a suspension device. 6. The tuyere suspension device according to claim 1, wherein a compliance mechanism for reducing a reaction force from the breaker is provided on a back side of the breaker. 7. The method of operating a tuyere suspension device according to claim 1, wherein the breaker and the reciprocating means are operated to suspend the tuyere inner surface from a tuyere front end to a tuyere end with the suspending tool. Next, after the breaker is retreated to the tuyere front end by the reciprocating means with the breaker in a non-operating state, the revolving means is rotated and positioned at a predetermined angle by the revolving means, and the breaker and the reciprocating means are operated again. A method for operating a tuyere lifting device, wherein the tuyere inner surface is suspended to the tuyere end by the suspending tool, and the above operations are repeated to remove the entire tuyere inner surface.