JP2006292278A - Repairing device and method for molten metal container inner surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repairing device, capable of appropriately removing, prior to repairing of lining on a molten metal container inner surface, slag adhered to the molten metal container inner surface or a deteriorated lining layer according to the adhering state of the slag or the deteriorating state of the lining layer. <P>SOLUTION: The repairing device 1 for crushing and removing, prior to spray repair, the lining of the molten metal container inner surface to a predetermined thickness comprises a mount frame part 3 to be placed above the container, a rotating part provided in the center of the mount frame part; a lifting support part 5 supported by the rotating part and extending downward; a lifting member liftably supported by the lifting support part; and a crusher provided on the lifting member to be movable forward and backward in directions orthogonal to the lifting direction and having a crushing tool at the tip. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for repairing by blowing the inner surface of a molten metal container having a refractory lining, and more particularly, to an apparatus for cutting and removing slag and lining deteriorated on the container inner surface prior to repair.

A cylindrical molten metal container that contains molten metal, such as a hot metal ladle, a molten steel ladle, and a smelting container, has a refractory brick stretched inside the steel container, and the inside of this brick is lined with an irregular refractory. It is made with.
However, as the use proceeds, the lining of the inner surface of the container deteriorates due to contact with molten metal such as molten iron or molten steel and slag, and wear or cracks.
For this reason, the repair which sprays an irregular refractory material on the container inner surface regularly is performed.

  If a new refractory material is overlaid and repaired by spraying on the deteriorated lining, slag or a deteriorated lining layer will remain in the repaired lining layer. When a crack is generated, there is a problem that the molten metal or slag enters through the crack into the deteriorated lining layer and the repaired lining layer is peeled off. For this reason, after repairing a damaged or deteriorated repair target portion and removing the attached slag or deteriorated lining layer, repairing is usually performed by spraying an irregular refractory.

  In Patent Document 1, as an apparatus for hot repair and maintenance of an irregular refractory material constructed in a molten metal container such as tundish or slag, as shown in FIG. A dismantling device 80 including a rotating drum 84 and a ground metal removal breaker 85 on a gantry 83 configured to be able to travel is disclosed. The cradle 83 of the dismantling device 80 can be moved or tilted in the vertical and width directions with respect to the tundish 86 by means of a telescopic cylinder (not shown), a tilting cylinder 88, a traverse rail (not shown), and the like. A boom 87 attached to the front end, a cutting blade (not shown) on the surface attached to the tip of the boom 87, and a frustoconical rotating drum 84 that is rotated by a rotary drive (not shown) is mounted. Furthermore, a breaker 85 is mounted on the gantry 83 so as to be movable or tiltable in the vertical and width directions with respect to the tundish 86 by an elevating mechanism 89 and a traversing cylinder (not shown).

Further, for example, in Patent Documents 2 and 3, as a device for removing a refractory material, a deposit, etc. lined on the inner surface of a molten metal container, hot metal or the like, a blade is attached to the outer peripheral portion of a rotating drum as shown in FIG. Cutting provided with a rotating bit 91 to which a plurality of bodies 92 are attached, a support frame 93 that supports the rotating bit, a rotation driving device 94 that rotationally drives the rotating bit, and a vibration device 95 that vibrates the rotating bit. A removal device 90 has been proposed.
JP 2000-337778 A JP 2001-98311 A JP 2003-74287 A

In a conventional repair device, the state of slag adhesion on the inner surface of the container and the deterioration of the lining are observed remotely, and the degree of lining to be cut and removed is determined according to the situation, and the above repair device is operated to perform cutting. It is carried out. In the repair devices of Patent Documents 1 to 3, a cutting tool is attached to the tip of a long articulated boom mounted on the moving means so that a wide range of repairs can be performed. Therefore, the pressing force of the cutting tool changes, and it is difficult to control the cutting amount to an appropriate amount in such remote operation. Particularly, in the repair of the inner surface of a cylindrical container, the amount of cutting in the circumferential direction is large and may cause a deviation, which is problematic in terms of work time and work accuracy.
The present invention improves the above problems and can remove the slag adhering to the inner surface and the deteriorated lining layer depending on the amount of slag adhering and the deterioration of the lining before repairing the lining of the inner surface of the container. It is an object to provide a repair device.

The present invention has been made to solve the above-described problems, and the gist thereof is as follows.
(1) A repairing device that crushes and removes the lining on the inner surface of the molten metal prior to spraying and repairing the inner surface of the molten metal container, and a mounting frame portion placed above the container, and a central portion of the mounting frame portion A swivel portion provided in the swivel portion, a downwardly supported lift support portion supported by the swivel portion, a lift member supported by the lift support portion so as to be movable up and down, and a lift member provided to be able to advance and retreat in a direction intersecting with the lift direction. An apparatus for repairing the inner surface of a molten metal container comprising a crushing device provided with a crushing tool at a tip thereof.

(2) The crushing apparatus is provided with a crushing tool having a plurality of crushing blades on the front surface of a disk at the tip of a rock drill, and repairs the inner surface of the molten metal container according to (1) apparatus.
(3) The crushing tool is characterized in that a plurality of crushing blades can be rotated around an axis parallel to the striking axis direction on the front surface of the disc, can be moved back and forth in the striking axis direction, and can be attached and detached. The repair device for the inner surface of the molten metal container according to (2).
(4) According to (2) or (3), in the crushing tool, a plurality of crushing blades are arranged on a front surface of a disc so that a tip thereof forms a flat surface or a curved surface convex forward. The repair apparatus of the molten metal container inner surface as described.

(5) The repair of the inner surface of the molten metal container according to any one of claims (1) to (4), further comprising a control device that controls turning, raising and lowering, and retreating of the crushing device of the repair device. apparatus.
(6) The repair device for an inner surface of a molten metal container according to any one of (1) to (3), wherein the crushing device includes a dust collection hood for sucking crushing waste.
(7) A repair method for crushing and removing the lining on the inner surface of the container prior to spraying and repairing the lining on the inner surface of the molten metal container, the repair device according to any one of (1) to (6) above While holding the crushing tool of the crushing device constant at a predetermined pressing force to the inner surface of the container, the crushing device is moved in the inner peripheral direction and / or the height direction of the container at a substantially constant speed to thereby form the amorphous refractory. A method for repairing the inner surface of a molten metal container, characterized by removing and dismantling a deteriorated layer on the entire surface of the metal.

  According to the repair device of the present invention, the crushing device for crushing the inner lining of the molten metal container is provided by the mounting frame part so as to be rotatable with respect to the inner surface of the container, capable of moving up and down, and capable of moving back and forth in the direction intersecting with the lifting direction. Therefore, when crushing the lining on the inner surface of the container, the crushing device can be turned to continuously crush the inner lining. Moreover, it can crush continuously with respect to the height direction of a container by raising / lowering a crushing apparatus to an up-down direction.

Preferably, if the crushing device is provided with a crushing tool having a plurality of cutting blades on the front surface of the disk at the tip of the rock drill, a wide range of container inner surfaces are crushed by a plurality of crushing blades. Can do.
Also, if the crushing blade can be rotated about an axis parallel to the striking axis direction and can be moved back and forth in the striking axis direction, the crushing blade can be used uniformly by rotating the disk and rotating the crushing blade. In addition to improving crushing efficiency, the crushing blade can be made uniform in wear, which is preferable in terms of maintenance. Moreover, if it is provided so as to be able to advance and retreat in the direction of the striking axis, the vibration of the rock drill can be used more effectively for the crushing action.
In addition, if the crushing blade is detachably attached to the disk, maintenance in the event of wear or breakage is easy.
In addition, if a crushing tool is arranged such that a plurality of crushing blades are arranged on the front surface of the disk so that the tip thereof forms a flat surface or a convex curved surface forward, a wide range of crushing blades can contact the inner surface of the container. Excellent efficiency.

Preferably, the repair device is provided with a control device that controls the turning, raising and lowering, and retreating of the crushing device, so that the surface degradation layer can be made uniform by controlling the crushing tool to a constant pressing force. Can be removed. Therefore, since it can construct on a healthy layer, a thin and high quality repair lining layer can be formed.
Further, preferably, since the crushing device includes a dust collecting hood for absorbing the crushing layer, finely crushed crushing waste can be sucked in parallel with the crushing operation, so that the work load and work time for waste discharge can be reduced. Can be shortened.
Moreover, since the repair apparatus of this invention is equipped with the mounting frame part and crushing part to a container integrally, in performing repair work, by installing the mounting frame part of a repair apparatus above a container. The repair work can be started immediately and extremely high work efficiency can be obtained.

Embodiments of the present invention will be described in detail with reference to the drawings.
1A and 1B are perspective views showing an overall outline of a repair device according to the present invention. FIG. 1A shows a main body, and FIG. 1B shows a state where the main body is placed on a cylindrical container. 2A and 2B are views showing the entire repair device of the present invention, where FIG. 2A is a top view, FIG. 2B is a front view, and FIG. 3 is a side view showing the entire repair device of the present invention.
4-6 is a figure which shows the outline | summary except the mounting frame part 3 of the repair apparatus of this invention, FIG. 4 is a perspective view, FIG. 5 is a front view, FIG. 6 is a side view. FIG. 7 is a side view showing an outline of the repair device according to another embodiment of the present invention, excluding the mounting frame.
In the description of the embodiment of the present invention, a cylindrical molten metal container having a substantially circular cross-sectional shape (the shape in a top view) perpendicular to the height axis will be described as an example. The container may be a cylindrical container, and its cross-sectional shape is not limited to a circle but may be an ellipse.
Needless to say, the cross-sectional shape may change in the axial direction (height direction).

  The repair device 1 according to the present invention includes a placement frame portion 3 placed so as to straddle the upper side of the container V, and a crushing portion 2 provided below the central portion of the placement frame portion 3. . In addition, the center part of the mounting frame part 3 means a part located in the center part of the mounting frame when the frame part is mounted above the container V, and is simply referred to as the mounting frame. It is also described as the central part. For example, when placed above the cylindrical container, the central portion substantially corresponds to the position of the central portion of the top sectional view of the cylindrical container.

  The crushing part 2 includes a turning part 4 supported at the center part of the mounting frame part 3, an elevating support part 5 supported by the turning part and extending downward, and an elevating member 6 supported by the elevating support part 5 so as to be movable up and down. The crushing device 7 is provided on the elevating member 6 so as to be able to advance and retreat in a direction crossing the elevating direction, and includes a crushing tool 8 at the tip. In the following description, a portion that is substantially symmetrical with respect to the ascending / descending direction (hereinafter also referred to as an ascending / descending axis) may be described by describing only one side symbol.

  In FIG. 1 to FIG. 3, the molten metal container V is usually provided with a pair of trunnions T and T projecting at opposite positions on the outer surface in order to lift and move the molten metal with a crane or the like. Yes. Then, as will be described later, the mounting frame unit 3 is mounted so as to straddle the opening of the container above the container V by installing the leg part on the trunnion.

The mounting frame portion 3 of the repair device of the present invention is configured by connecting a first frame body 11 and a second frame body 12 provided so as to penetrate the first frame body.
The first frame body 11 is connected via a pair of leg members 13 and 13 having an open end for placing on the trunnion T at the lower end and horizontal connecting members 14 and 15 at the upper end of the pair of leg members 13. And a pair of arc-shaped horizontal support members 16, 16 formed to be curved so as to follow the outer peripheral surface of the container, and inner support columns 17, 18 erected on the pair of horizontal support members 16, The upper ends of the inner support columns 17 and 18 are basically composed of a pair of inner horizontal support beams 19 and 20 that are connected across the upper side (opening) of the container.
The positions in the circumferential direction of the inner support pillars 17 and 18 erected on the horizontal support member are inside the connection position between the horizontal connection members 14 and 15 and the horizontal support member 16. A pair of lifting parts 21 and 21 of the repair device are provided on the upper surfaces of the pair of inner horizontal support beams 19 and 20 on the leg side.

On the other hand, the second frame body 12 has a pair of outer support columns 22 and 23 erected in the vicinity of both end portions of the horizontal support members 16 and 16 and upper ends of the outer support columns 22 and 23 above the container (opening portion). ) And a pair of outer horizontal support beams 24 and 25 which are connected to each other.
The circumferential positions of the outer support columns 22 and 23 erected on the horizontal support member 16 are outside the connection position between the horizontal connection members 14 and 15 and the horizontal support member 16.

  The first frame body 11 and the second frame body 12 connect the four support pillars of the inner support pillars 14 and 15 and the outer support pillars 22 and 23 by a pair of connecting beams 26 and 26, and the inner horizontal support beam 19. , 20 and the outer horizontal support beams 24, 25 are connected and integrated by a pair of intermediate connection beams 27, 27 to constitute the mounting frame portion 3.

  Further, the upper surfaces of the inner horizontal support beams 19 and 20 and the outer horizontal support beams 24 and 25 constitute a power supply / hydraulic supply device support surface, and a revolving part, a lift support part, a lift member and a shredding part constituting a crushing part. A power supply / hydraulic supply apparatus 52 for supplying power for operating the apparatus and supplying hydraulic pressure is mounted.

Next, the crushing part 2 will be described. In the description of the crushing portion, the outer side or the outer surface refers to the side or the surface facing the inner surface (inner peripheral surface) of the container, and the inner side or the inner surface refers to the central axis side or the surface of the container.
4 to 6, the crushing unit 2 includes a swivel unit 4 supported by the mounting frame unit, a lift support unit 5 supported below the swivel unit 4, and a lift supported by the lift support unit 5 so as to be lifted and lowered. It consists of a member 6 and a crushing device 7 provided on the elevating member so as to be able to advance and retreat in a direction crossing the elevating direction and having a crushing tool 8 at the tip.

  First, the swivel unit 4 includes a mounting plate 28, a swivel upper plate 30 that is mounted below the mounting plate 28 via four spacing holding members 29 with a distance from the mounting plate, and the swivel upper plate 30. And a turn lower plate 31 connected and supported so as to be turnable via a turning wheel 40.

A drive motor 32 is provided in a space formed between the mounting plate and the upper turning plate by the spacing member 29 to turn the lower turning plate. A drive gear (not shown) connected to the motor is meshed with a turning gear (not shown) of a turning wheel provided inside the turning lower plate 31, and the turning lower plate 31 is driven by the motor. The turning upper plate 30 can be turned.
On the other hand, the mounting plate 28 is fixedly supported on the lower surfaces of the outer horizontal support beams 24 and 25 and the intermediate connection beams 27 and 27 of the mounting frame portion. Therefore, the lower turning plate can turn with respect to the mounting frame portion.

Next, an elevating support part is supported below the turning part. In addition, as shown in FIG. 4, the axial direction in which the raising / lowering member 6 mentioned later is provided is demonstrated as a left-right direction, and the direction orthogonal to the surface containing this is demonstrated as the front-back direction.
That is, as shown in FIG. 4, on the lower surface of the lower swivel plate 31, four guide rails 34a, 34b, 34a ′, 34b ′ having a longitudinal protrusion 33 on the outer surface and extending downward are provided on the lifting shaft. It is fixedly arranged so as to form a substantially rectangular shape in a cross-sectional view orthogonal to the direction, and two adjacent front and rear 34a and 34a ', 34b and 34b' are each set, and the central axis of the central part of the frame part It is arranged facing left and right across

  In the middle part in the longitudinal direction of the guide rail, the opposing inner surfaces of the left and right 34a and 34b, 34a 'and 34b' are fixed members 35 and 35 ', and the adjacent side surfaces are fixed members at the lower end. 36 is connected and fixed.

For example, a roller chain driving device is fixed to the upper portion of the guide rail as an elevating device 37, and the roller chain spanned between the sprocket 38 supported by the fixing member 36 at the lower end portion of the guide rail. 39. The roller chain 39 is connected to a lifting member described later.
A control device 51 that controls the operation of the turning portion, the lifting support portion, the lifting member, and the crushing device constituting the crushing portion is provided below the turning lower plate 31.

  Next, a single elevating member 6 that penetrates left and right between the left and right groups 34a and 34b and the front and rear of the guide rails of 34a 'and 34b' and extends outwardly beyond the outer surface of the guide rail is the roller It is connected and supported by the chain 39, and is provided so that it can be raised and lowered.

  The elevating member 6 is provided with a groove 42 having an opening on the lower side in the longitudinal direction and a recess 43 on the outer side, and a crushing device described later is supported so as to be movable in the longitudinal direction of the elevating member. It is like that.

Guide roller brackets 44 and 44 are attached to the upper surface of the elevating member on the left and right sides. The guide roller bracket includes two guide rollers 45 that are vertically engaged with the protrusion 33 of the guide rail. 46 is provided.
When the elevating member 6 moves up and down by driving the elevating device 37, the guide rollers 45 and 46 of the guide roller bracket 44 of the elevating member move by engaging with the protrusion 33 of the guide rail, so that the elevating member is stabilized. You can go up and down.

Next, two crushing devices 7 and 7 each having a crushing tool at the tip are provided on the left and right sides of the elevating member 6 so that the tip can be moved outward in the longitudinal direction.
That is, the crushing device 7 includes a rock drill 9 and a crushing tool 8 attached to the tip of the rock drill 9. An engagement fitting 53 is provided on the trunk of the rock drill 9, and is engaged with the lower surface of an attachment member 47 having a suspension 48 and a protrusion 49 on the upper surface. The suspending portion 48 of the attachment member 47 is slidably engaged with the concave portion 43 on the outer surface of the elevating member 6, and is suspended and supported so as to be movable in the longitudinal direction of the elevating member 6.

On the other hand, in the groove 42 of the elevating member 6, two hydraulic cylinders 50, 50 having tips that advance and retreat in the longitudinal direction are provided so that the advancing and retreating directions are opposite to each other. It connects with the projection part 49 of the attachment member 47 of each crushing apparatus.
By the operation of the hydraulic cylinder 50, the crushing device 7 can advance and retreat in the longitudinal direction of the elevating member 6, that is, in the left-right direction. In addition, a desired pressing force can be obtained thereby, and in particular, it can be kept constant, so that the deteriorated layer can be crushed almost uniformly following the shape of the inner surface of the container.

FIG. 7 is a side view showing a repair device according to another embodiment of the present invention, excluding the placement frame portion. The repair device of the embodiment shown in FIG. 7 has basically the same structure as the repair device shown in FIGS. 1 to 6, but includes a dust collection mechanism.
That is, a dust collection hood 56 is provided in the crushing device 7 for sucking crushed debris that has crushed the inner surface of the container. The rear end of the dust collection hood 56 is connected to an expandable suction hose 57, and further dust collection Connected to tube 58. The dust collection tube 58 is connected to a dust collector (not shown). Thereby, in parallel with the crushing operation of the inner surface of the container, the crushing waste can be discharged from the inside of the container to the outside, and the work efficiency is improved.

Next, the crushing apparatus will be described. As described above, the crushing device is composed of the rock drill 9 and the crushing tool 8 attached to the tip thereof.
In the present invention, the crushing device may be a crushing tool provided with a crushing tool at the tip of a piston of a known rock drill, and may produce a striking action. Moreover, it is also preferable to use a rock drill having not only a striking action but also an action of rotating the crushing tool. As will be described later, in the case of using a rock drill having striking and rotating action, the shape of the crushing tool is preferably circular.

FIG. 8 is a schematic view showing an example of the structure of a rock drill of the crushing device, where (a) is a top view and (b) is a side view.
The cylinder 54 of the rock drill 9 is provided with hydraulic supply ports LP and HP connected to a low hydraulic line and a high hydraulic line in order to operate a piston (not shown) in the cylinder. An axial striking force can be continuously applied to the tip shank rod R, and a crushing tool attached to the tip of the shank rod R of the rock drill can be hit in the axial direction. Hereinafter, this direction is also referred to as a striking axis direction.

  The rock drill 9 incorporates a hydraulic motor (not shown) as the rotational drive mechanism 55 for the shank rod R. A pinion gear (not shown) is provided in direct connection with the motor, and meshes with a spindle gear (not shown) provided around the shank rod R.

  The hydraulic motor is rotated by the hydraulic pressure supplied from the hydraulic supply ports RvP1 and RvP2 connected to the forward and reverse lines of the rotation drive mechanism, and the rotational force is transmitted to the spindle gear via the pinion gear directly connected to the motor. Thus, the shank rod stuck in the inner surface of the spindle gear can be rotated.

  Thus, the rock breaker of the crushing device provided in the repair device of the present invention can give not only striking force to the shank rod but also rotational force, and the crushing tool attached to the tip of the shank rod It enables the blow rotation action. Therefore, the crushing efficiency is extremely high.

Next, the crushing tool 8 of the crushing apparatus will be described.
FIGS. 9A and 9B are diagrams showing an outline of the configuration of the crushing tool, where FIG. 9A is a perspective view, FIG. 9B is a front view, and FIG. 9C is a cross-sectional view taken along line AA in FIG. FIG. 10 is a schematic view showing a crushing blade.

In FIG. 9, the crushing tool 8 includes a substantially circular disk 60 having a multi-step flat surface 59, a cylindrical holder 61 integrally formed so as to be coaxial with the center of the circular tip, and a disk front surface. And a crushing blade 63 attached to a plurality of cylindrical holding holes 62 provided in the.
That is, a bottomed cylindrical holding hole 62 having an axis parallel to the axis of the holder 61, that is, an axis parallel to the striking axis direction, is formed in the flat surface of the disk 60.

  The inner diameter of the cylinder of the holder 61 is equal to or less than the outer diameter of the shank rod R of the rock drill 9, and the shank rod R of the rock drill 9 is inserted into the cylinder of the shank, and both are connected by a pin 67. Is configured.

  Next, the crushing blade 63 will be described. FIG. 10 is a diagram showing an outline of the crushing blade 63. As shown in FIG. 10, the crushing blade 63 includes, in the axial direction, a head 65 having a conical tip Tp at the tip, a blade neck 64, a front locking part 68, a trunk 66, and a rear locking part 69. And a washer 70 loosely fitted to the body 66.

  A carbide tip is normally embedded as a tip Tp at the tip of the head 65 of the crushing blade 63.

  Further, the outer diameter of the front locking portion 68 is formed to be the same as or slightly larger than the maximum diameter of the head 65, and larger than the inner diameter of the holding hole 62 of the disk 60 of the striking rotary tool. That is, the crushing blade 63 is locked at the front edge of the holding hole 62 so that the rear end of the body portion does not collide with the bottom of the disk holding hole 62.

  Further, the diameter of the body portion 66 is smaller than the inner diameter of the holding hole 62 and, as will be described later, the body portion has a slight gap between the inside surface of the washer 70 provided on the outer surface of the body portion, that is, the inside of the washer 70. It is set so as to ensure a gap that can move freely in the axial direction.

  On the other hand, the washer 70 is formed as a cylindrical member having a slit M cut out in the axial direction. The washer 70 is elastically expandable in the radial direction by the radial gap m formed by the slit M. Therefore, the washer 70 is preferably formed of an elastic material such as spring steel.

  When the washer 70 is enlarged, its outer surface is in close contact with the inner surface of the holding hole 62, and the inner surface is formed so as to form a gap with the outer surface of the body 66 of the crushing blade. The outer surface forms a gap with the inner surface of the holding hole 62, and the inner surface is formed so as to be close to the outer surface of the body 66.

  Further, as described above, when the washer 70 is enlarged, the axial rear end surface of the washer 70 comes into contact with the front surface of the rear locking portion 69 of the crushing blade to prevent the crushing blade 63 from coming out. Therefore, the diameter and the plate thickness of the washer 70 are set so that the inner diameter when the washer 70 is expanded is smaller than the diameter of the rear locking portion 69.

Further, the axial length of the washer 70 is shorter than the axial length between the front locking portion 68 and the rear locking portion 69 as shown in FIG.
That is, an axial gap 71 is formed between the front locking part 68 and the rear locking part 69 between the washer 70 and the body 66 of the crushing blade 63 can move in the axial direction during this period. A movement allowance of the crushing blade 63 or a stroke 71 is provided.

  The blade neck 64 is formed between the head 65 and the front locking portion 68 with a diameter smaller than the diameter of the head 65 and the front locking portion 68. The blade neck portion 64 is formed to facilitate attachment / detachment of the crushing blade 63, and the axial length and diameter of the blade neck portion 64 are determined by a detachable tool when the crushing blade 63 is attached to / detached from the disk 60. What is necessary is just to form so that it can advance / retreat to the blade neck part 64, and this tool can be inserted, and it can be latched to the head 65 or the front latching part 68.

  By crushing the washer 70 by expanding the gap of the slit M and attaching the washer 70 to the body portion 66 of the crushing blade 63, the crushing blade 63 used in the repair device of the present invention can be suitably configured.

  The crushing blade 63 configured in this manner is reduced in diameter while suppressing the outer periphery of the washer 70, inserted into the holding hole 62 provided in the disk 60 of the crushing tool 8, and while tapping the head 65 of the crushing blade 63. It is pushed into the holding hole 62 and attached to the disk 60 of the crushing tool 8. The washer 70 is preferably pushed into the holding hole 62 until the front end does not protrude from the front surface of the disk 60.

  The washer 70 expands in the holding hole 62 and elastically adheres to the inner surface of the holding hole 62, and has a gap between the inner surface of the washer 70 and the outer surface of the barrel 66 of the crushing blade 63. The crushing blade 63 is held on the disk 60 of the crushing tool 8 in a loosely fitted state.

  As described above, the crushing tool 8 to which the crushing blade 63 is attached is attached to the shank rod R of the rock drilling machine 9 to obtain the repair device of the present invention, and repair is performed.

  At this time, the axial length of the washer 70 is shorter than the axial length of the engaging portions before and after the crushing blade 63 and there is an axial stroke 71 between them, so that the shank rod R of the rock drill 9 The crushing blade 63 advances and retreats between strokes by the acceleration generated by the back-and-forth vibration, and bites into the surface of the refractory to perform crushing. The gap, that is, the stroke, is preferably set to be about 2 to 3 mm, and an acceleration necessary for biting can be obtained by a synergistic effect with the frequency of the rock drill 9.

  In addition, since there is a radial gap between the crushing blade 63 and the washer 70 as described above, the crushing blade 63 is around the axis in the holding hole 62, that is, parallel to the striking axis direction. It can be rotated around its axis. As a result, the tip of the crushing blade is uniformly worn or polished.

  That is, as described above, the rock drill 9 of the repair device of the present invention has a rotating mechanism that rotates the shank rod R about its axis, and therefore, the crushing tool attached to the tip of the shank rod R. 8 also rotates in a certain direction by the rotation.

  When the crushing tool 8 is rotated, the crushing blade 63 is rotatably mounted around the axis in the holding hole 62 of the crushing tool 8 as described above. The crushing blade 63 also rotates about its axis due to the frictional force between them. In other words, when the rotation of the crushing tool 8 around the shank rod R is revolved, the crushing blade 63 is in a rotating relationship. For this reason, the crushing blade 63 is uniformly polished or worn around its axis.

  While the tip Tp at the tip of the crushing blade 63 is uniformly worn, it is not necessary to replace the crushing blade. When the tip becomes shorter, only the crushing blade 63 needs to be exchanged.

  The replacement of the crushing blade 63 can be carried out by pulling forward using this action by engaging a detachable tool (not shown) with the blade neck portion 64 of the crushing blade 63 to be replaced.

  Thus, the crushing tool 8 in the repair device of the present invention has a plurality of crushing blades 63 in the plurality of holding holes 62 having axes parallel to the direction of the striking axis provided on the disk 60 of the crushing tool 8. Since it can be moved back and forth in the axial direction and is rotatable around the shaft, the crushing blade 63 moves forward and backward to bite into the surface of the refractory material in addition to the vibration of the rock drill 9 and efficiently. Can be crushed.

  Further, since the crushing blade 63 is uniformly worn and there is no uneven wear, uniform crushing efficiency can be obtained regardless of the crushing position, and the crushing blade 63 is used until the tip Tp at the tip of the crushing blade 63 is shortened. be able to. Furthermore, since the crushing blade 63 can be easily attached and detached, only the worn crushing blade can be replaced quickly.

  The plurality of crushing blades 63 attached to the front surface of the disk 60 may be attached so that the surface formed by connecting the tips thereof forms a flat surface. It is composed of a multi-level flat surface so that it is slightly higher than the surface, and by attaching a crushing blade to each surface, a surface formed by connecting the tips of a plurality of crushing blades 63 forms a curved surface that gently protrudes forward You may make it do. By making the surface formed by the tips of the plurality of blades into a flat shape or a curved shape protruding gently, a wide range of crushing blades can contact the lining surface of the container, and crushing efficiency is improved.

  In the present invention, preferably, as shown in FIG. 4 and FIG. 5, a control device 51 is provided on the lower side of the lower rotating plate, the drive motor 32 for the turning portion of the repair device, and the lifting drive device 37 for the lifting support portion. The crushing operation can be efficiently performed by controlling the operation of the hydraulic cylinder 50 of the elevating member and the crushing device 7 and controlling the turning, elevating, and retreating of the crushing device. In addition, the installation position of this control apparatus is not restricted to the lower side of a turning lower board, It can install in the other suitable position of a repair apparatus.

  When repairing the inner surface of the container using the repair device of the present invention, as shown in FIG. 2 or FIG. 3, the pair of lifting portions 21, 21 provided on the mounting frame portion are lifted by a crane or the like, The leg is engaged with the trunnion T of the container V to be repaired, and the repair device is fixed to the container. Thereby, a crushing part is installed in the center part of a container.

  Next, as shown in FIGS. 4 to 6, the control device 51 turns the turning portion and / or raises / lowers the elevating member, or further moves the crushing device forward and backward to a predetermined position for crushing the crushing device. Set, then activate the crusher and start crushing the lining.

  As the crushing progresses, the axial height and the circumferential position are changed through the control device while maintaining the pressing force of the crushing device substantially constant. As a result, the lining of the inner surface of the container can be crushed continuously, and the thickness of the lining layer to be crushed can be ensured uniformly.

Since the repair device of the present invention is integrally provided with a mounting frame portion on the container, in performing repair work, the repair work is immediately started by installing the mounting frame portion of the repair device on the container. And extremely high work efficiency can be obtained.
Furthermore, since the crushed and removed waste can be discharged in a vertical posture by suction, the movement of the pan can be minimized, and the work efficiency of the entire repair work including spraying can be improved.

It is a perspective view which shows the whole outline | summary of the repair apparatus of this invention, (a) is a main body, (b) shows the state which mounted the main body in the container. It is a figure which shows the whole repair apparatus of this invention, (a) is a top view, (b) is a front view. It is a side view which shows the whole repair apparatus of this invention. It is a perspective view which shows the outline | summary except the mounting frame part of the repair apparatus of this invention. It is a front view which shows the outline | summary except the mounting frame part of the repair apparatus of this invention. It is a side view which shows the outline | summary except the mounting frame part of the repair apparatus of this invention. It is a front view which shows the outline | summary except the mounting frame part of the repair apparatus of other embodiment of this invention. It is a schematic diagram which shows the example of the rock drill used for the crushing apparatus of this invention, (a) is a top view, (b) shows a side view. It is a schematic diagram which shows the example of the crushing tool used for the crushing apparatus of this invention, (a) is a perspective view, (b) is a front view, (c) shows AA sectional drawing of (b). It is a schematic diagram which shows the example of the crushing blade of the crushing tool used for the crushing apparatus of this invention. It is a figure which shows the outline | summary of the conventional repair apparatus. It is a figure which shows the outline | summary of the conventional repair apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Repair apparatus 2 ... Crushing part 3 ... Mounting frame part 4 ... Turning part 5 ... Elevating support part 6 ... Elevating member 7 ... Crushing apparatus 8 ... Crushing tool 9 ... Rock drill 11 ... 1st frame body 12 ... 2nd Frame body 13 ... Leg members 14 and 15 Horizontal connecting member 16 Horizontal support members 17 and 18 Inner support columns 19 and 20 Inner horizontal support beams 21 Lifting portions 22 and 23 Outer support columns 24 and 25 Outer horizontal Support beam 26 ... Connecting beam 27 ... Intermediate connecting beam 28 ... Mounting plate 29 ... Spacing member 30 ... Turning upper plate 31 ... Turning lower plate 32 ... Drive motor 33 ... Projections 34a, 34a ', 34b, 34b' ... Guide rail 35, 35 '... fixed member 36 ... fixed member 37 ... lifting device (roller chain drive device)
38 ... Sprocket 39 ... Roller chain 40 ... Swivel wheel 42 ... Groove 43 ... Recess 44 ... Guide roller bracket 45, 46 ... Guide roller 47 ... Mounting member 48 ... Suspension part 49 ... Projection part 50 ... Hydraulic cylinder 51 ... Control device 52 ... Power supply / hydraulic supply device 53 ... engagement fitting 54 ... cylinder 55 ... rotation mechanism 56 ... dust collection hood 57 ... dust collection hose 58 ... dust collection pipe 59 ... flat surface 60 ... disk 61 ... holder 62 ... holding hole 63 ... crushing blade 64 ... Blade neck 65 ... Head 66 ... Body 67 ... Pin 68 ... Front locking part 69 ... Rear locking part 70 ... Washer 71 ... Axial gap (stroke)
80 ... dismantling device 81 ... wheel 82 ... rail 83 ... pedestal 84 ... rotating drum 85 ... breaker 86 ... tundish 87 ... boom 88 ... tilting cylinder 89 ... lifting mechanism 90 ... cutting removal device 91 ... rotating bit 92 ... blade body 93 ... Support frame 94 ... Rotary drive device 95 ... Vibration device
HP ... Hydraulic supply port (high hydraulic line)
LP ... Hydraulic supply port (low hydraulic line)
M ... Slit
m ... Slit gap
R ... Shank rod
RvP1 ... Hydraulic supply port (forward rotation line)
RvP2 ... Hydraulic supply port (reverse line)
V ... Container T ... Trunnion
Tp ... chip

Claims (7)

  Prior to spraying and repairing the lining on the inner surface of the molten metal container, this is a repair device for crushing and removing the lining on the inner surface of the container, and a mounting frame portion placed above the container and a central portion of the mounting frame portion. A swivel portion provided, a vertically extending support portion supported by the swivel portion, a lift member supported by the lift support portion so as to be capable of being lifted and lowered, and provided so as to be able to advance and retreat in a direction crossing the lift direction. An apparatus for repairing the inner surface of a molten metal container, comprising a crushing device having a crushing tool at the tip.   The said crushing apparatus is provided with the crushing tool which has a some crushing blade in the front surface of a disk at the front-end | tip of a rock drill, The repair apparatus of the molten metal container inner surface of Claim 1 characterized by the above-mentioned.   The crushing tool is provided with a plurality of crushing blades on a front surface of a disk that can be rotated around an axis parallel to the striking axis direction, can be moved back and forth in the striking axis direction, and is detachable. Item 3. An apparatus for repairing the inner surface of a molten metal container according to Item 2.   4. The molten metal container according to claim 2, wherein the crushing tool has a plurality of crushing blades arranged on a front surface of a disk so that a tip thereof forms a flat surface or a curved surface convex forward. 5. Internal repair device.   5. The repair device for an inner surface of a molten metal container according to claim 1, further comprising a control device that controls turning, raising / lowering, and advance / retreat of the crushing device of the repair device.   The said crushing apparatus is provided with the dust collection hood for attracting | sucking crushing waste, The repair apparatus of the molten metal container inner surface of any one of Claims 1-5 characterized by the above-mentioned.   It is the repair method which crushes and removes the lining of a container inner surface prior to spraying repair of the lining of a molten metal container inner surface, Comprising: The crushing tool of the said crushing device of the repair apparatus of any one of Claims 1-6 While maintaining a predetermined pressing force on the inner surface of the container, the crushing device is moved at a substantially constant speed in the inner circumferential direction and / or the height direction of the container, so that the deteriorated layer on the surface of the irregular refractory is spread over the entire surface. A method for repairing the inner surface of a molten metal container characterized by removing and dismantling.

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