JP2002005579A - Device for spraying refractory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for spraying a refractory, which can control the thickness of spraying of the refractory at high sped, and also can perform the manipulation of work execution of a refractory at high speed. SOLUTION: A device for spraying a refractory, which sprays a refractory to the inwall of a container (1) for molten metal, is equipped with a material supply pipe (11) which supplies a refractory hung vertically down and supported by a supporting stage (6) capable of shifting on a container for molten metal, a spray nozzle (12) which sprays a refractory attached to the lower part of the material supply pipe, a laser range finder (15) which measures the distance between the inwall face of the work execution place of the container for molten metal and the axis (11a) of the material supply pipe attached to the material supply pipe capably of integrated shifting with the spray nozzle, a rotation means (14) which rotates the material supply pipe around the axis, and a control means (50) which gets a shifting distance required for the axis of the material supply pipe to accord with the center axis of the container for molten metal based on the measurement results by the laser range finder, and can shift the material supply pipe according to the obtained shifting distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory spraying apparatus, and more particularly to a refractory spraying apparatus for repairing a molten metal container such as a ladle in a steelworks or for newly applying an amorphous refractory. Related to construction equipment.

[0002]

2. Description of the Related Art A container for molten metal such as a ladle needs to be provided with an irregular-shaped refractory for repair or new one.

[0003] The conventional refractory construction methods include a construction method by spraying and a construction method by pouring. The repairing method by spraying includes a dry spraying method and a wet spraying method. In the dry spraying method, a powdery refractory material is transported to a spray nozzle using compressed air, and water or a binder is added to the powdery refractory material in the spray nozzle, mixed, and the resulting slurry is formed. The refractory material is blown to the construction site by compressed air. The wet spraying method is a method in which water is added to a powdery refractory material, and a slurry-like refractory material produced by kneading is conveyed by a pump through a spraying pipe, and a binder is added in a spraying nozzle to be formed. The material is blown to the construction site by compressed air.

[0004] Unlike the method by spraying, the casting method is a casting method in which a formwork is assembled at a construction site, and a slurry-like refractory material kneaded with water is poured into the formwork. In the casting method, the obtained refractory has a dense structure and a long service life, but a formwork is always required for the construction.

[0005] As a recent tendency, a wet-spraying construction method which is almost the same level as the pouring method and has excellent durability and high quality and uniformity is being adopted.

[0006] In such a spraying method, a spray material is sprayed by hand blowing (a method in which an operator holds the nozzle by hand and spraying) or by using a nozzle driving device. Therefore, when spraying by human power,
The work of moving heavy nozzles by hand is necessary, and this movement is heavy work. In addition, since the work is performed at the construction site, workers are exposed to rebound loss and dust, which is dangerous. However, there is a drawback in that the spraying on the construction surface causes individual differences in the spraying thickness. In order to solve such a drawback, there has been known an apparatus which performs construction while driving a spray nozzle.

[0007] As an apparatus for performing the construction while driving the spray nozzle, while measuring the thickness of the spray wall by measuring the distance to the inner wall of the ladle using a laser distance meter,
2. Description of the Related Art There is known an apparatus that performs a spraying operation by driving a spraying nozzle to perform a spraying operation to a target thickness (for example, WO-A1-9926746).

[0008]

However, in a conventional refractory spraying apparatus using a laser range finder, the movement of the spray nozzle and the laser range finder are independently controlled, and the position of the nozzle pivot axis is adjusted. There was no technical idea to match the center point of the ladle. Also,
There was no technical idea to determine the position of the nozzle pivot axis in a predetermined positional relationship with the center point of the ladle. For this reason, the refractory construction operation has been performed in a state where the position of the nozzle turning axis is not coincident with the center point of the ladle. And the distance measurement from the nozzle rotation axis to the construction surface of the ladle has been performed through extremely complicated calculations using the principle of triangulation. In addition, the measurement of the sprayed thickness not only requires complicated calculations, but if the sprayed thickness changes, an error occurs in the distance measurement, and the accurate sprayed thickness cannot be measured.

As described above, in the conventional refractory spraying application apparatus using the laser range finder, not only the refractory spray thickness cannot be controlled with high accuracy, but also the application operation cannot be performed at high speed. Was. In addition, since a complicated arithmetic process has to be performed, the control device has been increased in scale.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to control the sprayed thickness of the refractory with high precision and to perform the refractory spraying operation at a high speed. It is to provide a device.

[0011]

In order to achieve the above object, a refractory spraying apparatus according to the present invention is directed to a refractory spraying apparatus for spraying refractory on an inner wall of a container for molten metal. A material supply pipe that is suspended and supported on a support base movable on the container for supplying refractories, a spray nozzle attached to a lower portion of the material supply pipe for spraying refractories, and an integral part of the spray nozzle. A distance meter movably attached to the material supply pipe and measuring a distance between an inner wall surface of a construction site of the molten metal container and an axis of the material supply pipe; and moving the material supply pipe around the axis thereof. It is necessary for the axis of the material supply pipe to coincide with the center axis of the molten metal container based on the result of measurement by the turning drive means for turning and the distance meter. Seek movement distance, characterized in that it comprises a moving controllable control means the material supply pipe in accordance with the moving distance obtained.

Further, the spraying nozzle and the distance meter are arranged such that the blowing direction of the spraying nozzle and the emission direction of the distance meter form an angle of 180 degrees with the axis of the material supply pipe. It is characterized by having.

Further, the control means obtains four measurement data by measuring the distance with the distance meter every time the material supply pipe is turned by 90 degrees around its axis, and obtains the four measurement data. The moving distance required for the axis of the material supply pipe to coincide with the central axis of the molten metal container can be calculated.

[0014] Further, the spray nozzle is characterized in that it can be swiveled around a swing axis which is perpendicular to the axis of the material supply pipe.

Further, the spray nozzle is characterized in that a swing angle, which is a swivel angle around the swing shaft, is set according to a depth position of the molten metal container.

[0016] Further, there is provided a traveling vehicle capable of traveling on a rail laid in proximity to the molten metal container, and the support platform is capable of traveling in a direction perpendicular to the traveling direction of the traveling vehicle. The control means is mounted on the vehicle, and is capable of controlling the traveling of the traveling vehicle on the rails and controlling the traveling of the support platform on the traveling vehicle.

Further, the control means is capable of controlling the traveling of the traveling carriage and the support table such that the locus of the axis of the material supply pipe is a locus circle centered on the central axis of the molten metal container. There is a feature.

[0018] The turning drive means may be arranged in accordance with the position of the axis of the material supply pipe in the locus circle so that the blowing direction of the spray nozzle forms a predetermined angle with respect to the inner wall surface of the molten metal container. The material supply pipe can be driven to rotate around its axis.

Further, the rail is laid so that each of the molten metal containers of the plurality of containers for molten metal arranged in parallel can be constructed continuously, and the position of each molten metal container is placed on the rail. The construction reference points are set at predetermined intervals in correspondence with the above.

Further, the material supply pipe is mounted on an elevating frame which is mounted on the support table so as to be able to ascend and descend.

In the above-mentioned invention, since the distance meter such as a laser distance meter and the spray nozzle are attached to the material supply pipe, the distance between the inner wall surface of the construction site of the molten metal container and the nozzle rotation axis is determined by the distance. The material supply pipe can be moved and controlled by the control means so that the axis of the material supply pipe is in a predetermined positional relationship with the central axis of the molten metal container by the control means. In addition, since the axis of the material supply pipe can be controlled to have a predetermined positional relationship with the central axis of the molten metal container, the turning angle of the spray nozzle can be controlled. As a result, it is possible to perform spraying on the molten metal container automatically controlled by the program. In addition, it is possible to continuously and automatically control spraying on a plurality of molten metal containers.

[0022]

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

In the following description, a ladle will be described as a representative example of the molten metal container to be constructed.

FIG. 1 is an elevation view of the refractory spraying apparatus according to the present embodiment, and FIG. 2 is a plan view. As shown in FIG. 1 or FIG. 2, a plurality of ladles 1 to which refractory is sprayed are arranged in a concave portion, and rails 2 and 2 are laid near an upper portion of the concave portion. On the rail 2, a factory reference point 2a is set at a predetermined pot interval corresponding to the position of each ladle 1 arranged.

On the rails 2, a gate-shaped traveling cart 4 is mounted so as to straddle the ladle 1 and to be positioned above the ladle 1. The traveling carriage 4 can travel on the rails 2 and 2 along the Y axis. Second rails 5 and 5 are provided on the traveling carriage 4 in a direction orthogonal to the rails 2 and 2. On the second rails 5 and 5, a support base 6 has an X-axis orthogonal to the Y-axis. It is possible to run in the direction.

A support 7 is provided upright on the support 6, and a lift frame 8 is mounted on the support 7 so as to be able to move up and down along the Z axis. One end of a flexible hose 10 that conveys a spray material (refractory) supplied from a material pump 9 is connected to an upper portion of the lifting frame 8. A material supply pipe 11 is provided at the lower end of the elevating frame 8 so as to extend in the elevating direction of the elevating frame 8. A spray nozzle 12 for spraying a refractory on the inner wall of the ladle 1 is attached to a lower end of the material supply pipe 11. The angle of the spray nozzle 12 with respect to the axis of the material supply pipe 11 can be freely set, and the angle with respect to the axis of the material supply pipe 11 is controlled by the operation rod 13.

The material supply pipe 11 is driven by a servomotor 14 for oscillating the nozzle to rotate the axis of the material supply pipe 11,
That is, it can freely turn around the nozzle turning axis B.

A laser range finder 15 is attached to the lower part of the material supply pipe 11 so as to move integrally with the spray nozzle 12. The laser range finder 15 is used to measure the distance between the inner wall surface of the ladle 1 and the axis of the material supply pipe 11, that is, the nozzle turning axis.

The laser range finder 15 is a ladle 1 for the laser beam.
By detecting the reflected light reflected on the construction surface and detecting the coherent phase difference between the emitted light and the reflected light on the light detection surface of the laser range finder 15, thereby detecting the direction of the emitted light. Measure the distance between the construction surface and the light detection surface. Since the laser distance meter 15 is fixed to the material supply pipe 11, the distance between the light detection surface of the laser distance meter 15 and the nozzle rotation axis is set to be constant. Therefore, the distance between the nozzle turning axis and the construction surface can be detected by the laser distance meter 15.

The spray nozzle 12 and the laser range finder 15 are arranged such that the direction in which the refractory is blown out from the spray nozzle 12 and the direction in which the laser range finder 15 emits make an angle of 180 degrees with the axis of the material supply pipe 12. It is arranged.

The driving shaft 2 is driven by the traveling servomotor 21.
2 is driven, and the rotation of the drive shaft 22
a. The position of the traveling vehicle 4 on the rails 2 with respect to the factory reference point 2a is measured by a traveling position detection sensor 23 installed near the wheels 4a. The traveling vehicle 4 is moved on the rails 2 and 2 by the traveling servomotor 21 based on a detection signal from the traveling position detection sensor 23.
Travel control is performed along the axis.

A traverse reference point 26 is set on the second rails 5, 5, and the traverse position detection sensor 27 attached to the support base 6 supports the traverse reference point 26 on the second rail 5, 5. The position of the platform 6 is measured. Support 6
Is controlled on the second rails 5 and 5 along the X axis by the traversing servomotor 25 based on a detection signal from the traversing position detection sensor 27.

A balance weight 30 is connected to one end of a rope 31 so as to be able to move up and down inside the column 7, and the rope 31 is connected to the lifting frame 8 via a group of pulleys 32 provided at the top of the column 7. . The pulley group 32 is driven and controlled by a lifting servomotor 33. A nozzle up / down reference point 34 is set on the column 7. The elevating frame 8 is provided with an elevating position detecting sensor 35, which measures the position of the elevating frame 8 on the column 7 with respect to the nozzle elevating reference point 34. The lifting frame 8 is controlled to move up and down along the Z-axis along the column 7 by the lifting servomotor 33 based on a detection signal from the lifting position detection sensor 35.

Various materials, which are spray materials, are supplied to a kneading device 40.
, And supplied to the material pressure feed pump 9, and supplied to the material supply pipe 11 and the spray nozzle 12 via the flexible hose 10. Flexible hose 1
Numeral 0 is partially covered by the cable pair 41, and moves linearly following the movement of the traveling vehicle 4 and the support 6 without bending in the cable pair 41.

The servomotor 14 for swinging the nozzle, the servomotor 21 for traveling, the servomotor 25 for traversing, and the servomotor 33 for raising and lowering are driven and controlled by a control device 50 containing a computer.

Next, a procedure for aligning the axis of the material supply pipe 11, that is, the nozzle turning axis 11 a with the center axis of the ladle 1 using the laser distance meter 15 will be described in detail with reference to FIG. As shown in FIG.
The position of a does not exactly coincide with the center point O of the ladle 1. Therefore, first, the emitted light from the laser rangefinder 15 is set to N
Irradiate the construction point P1 toward the (north) direction, and rotate the nozzle
The distance D1 between 1a and the construction point P1 is measured.

Next, the servo motor 14 for swinging the nozzle
Is used to rotate the material supply pipe 11 around the nozzle rotation axis 11a clockwise with the rotation angle θ = 90 degrees based on the N direction, and is directed in the E (east) direction. Laser rangefinder 15
And the spray nozzle 12 are integrally attached to the material supply pipe 11, so that both the laser distance meter 15 and the spray nozzle 12 rotate 90 degrees. Then, the light emitted from the laser range finder 15 is irradiated to the construction point P2 in the direction E, and the distance D2 between the nozzle turning shaft 11a and the construction point P2 is measured.

Next, the material supply pipe 11 is rotated clockwise around the nozzle rotation axis 11a by a rotation angle θ = 180 degrees, and directed in the S (south) direction. And the laser distance meter 1
The emitted light from No. 5 is directed to the construction point P3 in the S direction, and the distance D3 between the nozzle turning axis 11a and the construction point P3 is measured.

Next, the material supply pipe 11 is rotated clockwise around the nozzle swivel axis 11a by a swivel angle θ = 270 degrees and directed in the W (west) direction. And the laser distance meter 1
The emitted light from No. 5 is directed to the construction point P4 in the W direction, and the distance D4 between the nozzle turning axis 11a and the construction point P4 is measured. The distances D1, D2, D3, and D4 are stored by a computer in the control device 50.

From the stored data of the distances D1, D2, D3, and D4, the X-axis direction correction amount DX and the Y-axis direction correction amount DY necessary for aligning the nozzle turning axis 11a with the center point O of the ladle 1 are calculated. Is calculated by the computer in the control device 50 as follows: X-axis direction correction amount DX = (D2-D4) / 2 Y-axis direction correction amount DY = (D1-D3) / 2.

The correction of the X-axis direction correction amount DX is performed by controlling the drive of the traversing servomotor 25 by the control device 50, and the correction of the Y-axis direction correction amount DY is performed by driving the traveling servomotor 21 by the control device 50. This is done by controlling. Thus, the nozzle pivot 11
The position at a can be matched with the center point O of the ladle 1. Such an operation is performed for each ladle 1 arranged as shown in FIG.

In a state where the position of the nozzle turning shaft 11a coincides with the center point O of the ladle 1, the spraying direction of the spraying nozzle 12 is set to a predetermined direction, and the material supply pipe 11 is rotated by a nozzle swinging servo motor 14. The refractory is sprayed on the construction surface of the ladle 1 by the spray nozzle 12 while rotating. Here, the elevation servomotor 33
It is also possible to spray the refractory onto the construction surface of the ladle 1 while raising and lowering the material supply pipe 11.

The spray thickness t applied to the construction surface of the ladle 1 depends on the position of the nozzle turning shaft 11a, that is, the ladle 1
The distance from the center point O to the same construction point is measured with a laser distance meter 1.
5 before and after the construction, and can be known by calculating the change in the measured distance.

Conventionally, when performing the spraying, the spread angle of the sprayed refractory material and the spraying thickness per time have been changed depending on the distance between the spraying nozzle 12 and the spraying surface. On the other hand, in the present invention, the position of the nozzle turning axis 11a is determined by the center point O of the ladle 1.
Since the spraying is performed with the fixed positional relationship, for example, the position of the nozzle turning shaft 11a coincident with the center point O of the ladle 1, automatic spraying by a program which has been difficult in the past can be performed.

Further, the position of the nozzle turning shaft 11a is
A fixed positional relationship with the center point O of the
To perform the spraying by making the position of a coincide with the center point O of the ladle 1, the spray nozzle 1 is operated by remote control operation or the like.
This is also effective when 2 is appropriately operated.

As shown in FIG. 4, the spray nozzle 12 is connected to the axis of the material supply pipe 11 and the spray nozzle 1.
2 can be swiveled around an axis (swinging axis) G perpendicular to the nozzle swivel axis 11a, and the swiveling angle (swing angle) u can be controlled by moving the operating rod 13 up and down. It is.

In FIG. 4, when the turning angle u is set to u1, the refractory blows out in the spraying direction indicated by A1 and B1
Is sprayed thicker as shown. Also, the turning angle u
Is set to u2, the refractory blows out in the spraying direction indicated by A2 and is sprayed thinner as indicated by B2.

The spray angle is set and the spray nozzle 12 is swung around the nozzle swivel axis 11a to perform spraying. In addition, by controlling the vertical direction of the spray nozzle 12 together with the setting of the turning angle u,
More accurate thickness control is possible. Further, by controlling the spray nozzle 12 in the horizontal direction, the thickness can be controlled with higher accuracy.

In this way, by variably controlling the turning angle u, it becomes possible to spray the refractory uniformly with a suitable spray thickness according to the spray position of the ladle 1. The fact that the spraying position of the ladle 1 can be designated and controlled in this way means that the position of the nozzle turning shaft 11a can be set in a fixed positional relationship with the center point O of the ladle 1. It is based on That is, since the positional relationship of the spray nozzle 12 with respect to the wall surface of the ladle 1 can be specified and controlled, the spray position of the ladle 1 can be designated and controlled.

As described above, the rails 2 and 2 are provided in parallel in the direction in which the plurality of ladles 1 are arranged. It can run along the axis. The traveling cart 4 is a rail 2, 2
The movement is controlled with reference to the factory reference point 2a set above. Thereby, efficient spraying construction can be continuously performed over the plurality of ladles 1.

As described above, according to the present embodiment, the position of the nozzle swivel axis 11a and the center point of the ladle 1 are adjusted, including the fact that the position of the nozzle swivel axis 11a coincides with the center point O of the ladle 1. It becomes possible to grasp the positional relationship with O with high accuracy.

Then, if necessary, the nozzle pivot 11
It is possible to easily and easily make the position of a coincide with the center point O of the ladle 1. Further, as described later with reference to FIG.
It is possible to control the movement of the spray nozzle 12 while keeping the position of the nozzle turning shaft 11a in a predetermined positional relationship with the center point O of the ladle 1.

Since the refractory can be sprayed on the construction surface of the ladle 1 in a state where the position of the nozzle turning shaft 11a coincides with the center point O of the ladle 1, distance measurement by the laser distance meter 15 before and after the spraying construction can be performed. It is possible to easily control the spray thickness t with high precision simply by performing the process. For example, it is possible to spray the refractory with a uniform thickness over the entire construction surface of the ladle 1.

Each time the material supply pipe 11 is turned by 90 degrees around the nozzle turning axis 11a, the laser distance meter 15 is turned.
The nozzle swivel shaft 11a can be measured only with a small number of steps to obtain four distances D1, D2, D3, and D4.
Can be made to coincide with the center point O of the ladle 1, the load on the computer in the control device 50 can be reduced, the construction operation can be performed at a high speed, and the device can be configured at low cost. be able to.

The blowing nozzle 12 and the laser range finder 15 are arranged such that the blowing direction of the blowing nozzle 12 and the emission direction of the laser range finder 15 are one with respect to the nozzle rotation axis 11a.
Since the nozzles are arranged so as to form an angle of 80 degrees, the spray nozzle 12 can spray the refractory onto the construction surface without the laser distance meter 15 becoming an obstacle.

The support platform 6 is mounted on the traveling vehicle 4 so as to be able to travel in a direction perpendicular to the traveling direction of the traveling vehicle 4 capable of traveling on rails 2 laid in close proximity to the ladle 1. Since the material supply pipe 11 is attached to the elevating frame 8 which is mounted on the support base 6 so as to be able to ascend and descend, the refractory spraying construction apparatus can be configured in an orderly and simple manner.

In the above description of the spraying operation, the case has been described in which the position of the nozzle turning shaft 11a is actually made to coincide with the center point O of the ladle 1 and the spray nozzle 12 is turned. However, the present invention is not limited to this.
Then, next, the position of the nozzle swivel axis 11a is not made to substantially coincide with the center point O of the ladle 1, and the spray nozzle 12 is not swirl-driven. An embodiment in which the movement of the spray nozzle 12 is controlled while maintaining a predetermined positional relationship with O will be described with reference to FIG.

This embodiment is effective when the radius of the ladle 1 is very large or small. In addition, it is possible to cope with the difference in the radius of the ladle 1 by replacing the spray nozzles 12 having different lengths.

FIG. 5 shows a case in which, when the radius of the ladle 1 is large, the spraying operation is performed with the spray nozzle 12 approaching the inner wall surface of the ladle 1 by a certain distance. In addition, when the radius of the ladle 1 is small, the spraying may be performed while the spray nozzle 12 is separated from the inner wall surface of the ladle 1 by a certain distance.

In FIG. 5, the movement of the spray nozzle 12 is controlled such that the trajectory of the nozzle swivel axis 11a is a trajectory circle 70 having a radius r centered on the center point O of the ladle 1.
Such movement control of the spray nozzle 12 is based on the fact that the positional relationship between the position of the nozzle turning axis 11a and the center point O of the ladle 1 has been determined, and specifically, The control is performed by controlling the drive of the traversing servomotor 25 by the control device 50 to control the movement of the support base 6, and by controlling the drive of the traveling servomotor 21 by the control device 50 to control the movement of the traveling vehicle 4.

Further, the blowing nozzle 12 is rotated so that the blowing direction K of the blowing nozzle 12 forms a predetermined angle v, for example, 70 degrees with respect to the inner wall surface of the ladle 1 at each position in the locus circle 70. In accordance with the position of the nozzle turning shaft 11a at each position in 70, the material supply pipe 12 is turned around the nozzle turning shaft 11a by the servomotor 14 for swinging the nozzle. Here, the predetermined angle v is an angle between the blowing direction K of the spray nozzle 12 and a tangent at the construction point on the inner wall surface of the ladle 1, and the refractory is flat without being sprayed on the inner wall surface in a mountainous manner. The predetermined angle v is set so that the air is uniformly sprayed.

The position of the nozzle turning shaft 11a is the ladle 1
As in the case where the refractory is sprayed on the construction surface of the ladle 1 in a state where the refractory is sprayed in a state where the center point O coincides with the center point O, the spray thickness t can be easily and highly accurately measured by performing a distance measurement with the laser distance meter 15 before and after the spraying construction Can be controlled,
For example, it is possible to spray a refractory with a uniform thickness over the entire construction surface of the ladle 1.

As described above, according to the embodiment shown in FIG. 5, even when the radius of the ladle 1 is very large or small, it is not necessary to replace the spray nozzle 12 and the ladle 1 can be replaced. Spraying construction can be performed such that refractory is sprayed with a uniform thickness over the entire construction surface.

Although a laser distance meter has been described as an example of a distance meter, the present invention is not limited to this, and a distance meter using an LED element may be used. The distance used may be used.

[0065]

As described above, according to the structure of the present invention, a material supply pipe which is supported by a supporting table movable on a molten metal container and which supplies refractory, A spray nozzle attached to the lower part for spraying refractories, and a distance between the inner wall surface of the construction site of the molten metal container and the axis of the material supply pipe, which is attached to the material supply pipe so as to be integrally movable with the spray nozzle. Based on the distance meter to be measured and the measurement result by the distance meter, based on the measurement result by the distance meter, the moving distance required for the axis of the material supply pipe to coincide with the central axis of the molten metal container is obtained, and the obtained moving distance is obtained. Control means capable of controlling the movement of the material supply pipe in accordance with it, so that the axis of the material supply pipe can be reliably set in a predetermined positional relationship with the central axis of the molten metal container. That. As a result, the construction operation can be performed at a high speed, and the construction thickness of the sprayed refractory can be controlled with high accuracy.

[Brief description of the drawings]

FIG. 1 is an elevation view showing an embodiment of a refractory spraying construction apparatus according to the present invention.

FIG. 2 is a plan view showing an embodiment of an apparatus for spraying refractories according to the present invention.

FIG. 3 is a view for explaining a procedure for aligning an axis of a material supply pipe with a center axis of a ladle;

FIG. 4 shows that the turning angle of the spray nozzle relative to the axial direction of the material supply pipe can be controlled.

FIG. 5 is a view for explaining an example in which the axis of the material supply pipe is not aligned with the center axis of the ladle and is turned along a trajectory circle to perform the construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladle 2 Rail 4 Traveling trolley 6 Supporting stand 8 Elevating frame 11 Material supply pipe 11a Nozzle turning axis 12 Spray nozzle 14 Servo motor for nozzle swing 15 Laser distance meter 21 Servo motor for traveling 25 Servo motor for traverse 33 Servo motor 50 Controller 70 Trajectory circle

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroya Sato 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Kokan Co., Ltd. (72) Inventor Hiroyuki Kamoda 1-1-1, Marunouchi, Chiyoda-ku, Tokyo No. 2 Nihon Kokan Co., Ltd. (72) Masao Taira Inventor 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Seiji Nagai Kudan Kita-shi, Chiyoda-ku, Tokyo No. 1-7 Shinagawa Kawabashi Brick Co., Ltd. (72) Inventor Tomoo Taniguchi 4-7 Kudankita, Chiyoda-ku, Tokyo 4-7 Shinagawa White Brick Co., Ltd. (72) Inventor Tetsuo Endo Tokyo Shinagawa Shira Brick Co., Ltd. (72) Inventor Keizo Nishimura 4-7-1 Kudankita Brick Co., Ltd., Tokyo Chiyoda-ku F-term (reference) ) 4E014 BB02 4F035 AA04 BA22 BB02 BC02 CA01 CD06 CD11 CD18 CD19 CE04 4K051 AA06 AB03 LA01 LA07 LA08 LA10

Claims (10)

[Claims] 1. A refractory spraying apparatus for spraying a refractory onto an inner wall of a molten metal container, wherein a material supply for supplying a refractory supported by being suspended on a movable support base on the molten metal container. A pipe, a spray nozzle attached to a lower portion of the material supply pipe for spraying a refractory, and an inner wall surface of a construction site of the molten metal container attached to the material supply pipe so as to be integrally movable with the spray nozzle. A distance meter that measures a distance between the material supply pipe and an axis thereof; a turning drive unit that drives the material supply pipe to rotate around the axis thereof; and an axis of the material supply pipe based on a measurement result obtained by the distance meter. Obtains a moving distance required to coincide with the central axis of the molten metal container, and controls movement of the material supply pipe according to the obtained moving distance. Refractory blowing construction device, comprising a Do control means. 2. The spray nozzle and the range finder are arranged such that a blow direction of the spray nozzle and an emission direction of the range finder form an angle of 180 degrees with an axis of the material supply pipe. The refractory spraying construction apparatus according to claim 1, wherein: 3. The control means obtains four measurement data by measuring the distance with the distance meter every time the material supply pipe is turned by 90 degrees around its axis, and obtains the four measurement data. 2. The refractory spraying apparatus according to claim 1, wherein the moving distance required for an axis of the material supply pipe to coincide with a central axis of the molten metal container can be calculated using the moving distance. 3. 4. The refractory spraying apparatus according to claim 1, wherein the spray nozzle is pivotable about a swinging axis that is perpendicular to an axis of the material supply pipe. 5. The swing angle of the spray nozzle, which is a swivel angle about the swing axis, is set according to a depth position of the molten metal container.
The refractory spraying construction device according to 1. 6. A traveling vehicle which can travel on a rail laid in proximity to the molten metal container, wherein the support platform is capable of traveling in a direction perpendicular to a traveling direction of the traveling vehicle. The vehicle according to claim 1, wherein the control means is capable of controlling the traveling of the traveling vehicle on the rail and controlling the traveling of the support platform on the traveling vehicle. The refractory spraying construction device described. 7. The traveling vehicle and the support platform can be controlled so that the trajectory of the axis of the material supply pipe is a trajectory circle centered on the central axis of the molten metal container. The refractory spraying construction apparatus according to claim 6, wherein: 8. The turning drive means according to a position of an axis of the material supply pipe in the locus circle such that a blowing direction of the blowing nozzle makes a predetermined angle with respect to an inner wall surface of the molten metal container. The refractory spraying apparatus according to claim 7, wherein the material supply pipe can be driven to rotate around its axis. 9. The rail is laid so that each of a plurality of molten metal containers arranged in parallel can be continuously constructed, and the position of each molten metal container is set on the rail. 7. The refractory spraying construction apparatus according to claim 6, wherein construction reference points are set at predetermined intervals corresponding to the following. 10. The refractory spraying apparatus according to claim 1, wherein the material supply pipe is mounted on an elevating frame that is mounted on the support table so as to be able to move up and down.