JP2005240090A - Method for dismantling molten iron tapping hole and dismantlement auxiliary device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform a dismantlement of an molten iron tapping hole in a blast furnace etc., for short time. <P>SOLUTION: A method for dismantling the molten iron tapping hole, is performed as the followings, by which over the dismantling schedule range of refractories constituting a furnace wall 3 around the molten metal tapping hole faced to a molten metal tapping trough 2 arranged on a casting floor 1, after digging plurality of digging holes 4 having a prescribed diameter D and prescribed length from the outer surface side of the furnace wall 3, the dismantlement is performed by crushing the remained refractories 5 between both adjoined dug holes 4. In the case of applying this method, since the amount of the remained refractories 5 in this dismantling scheduled range is made to be the extremely little amount to the dismantling scheduled amount by beforehand digging the plurality of the digging holes 4, the necessary time is made to be shorter in comparison with the dismantlement of the refractories by using the conventional drill type dismantling device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for dismantling a tap outlet such as a blast furnace and a disassembly assisting device.

  The outlet for taking out the molten iron that has fallen into the blast furnace pool is opened when the ironmaking raw material has sufficiently melted in the blast furnace and a predetermined amount of iron is available, and after the opening, When the amount of brewing reaches the predetermined amount, it is closed.

  The refractory used on the blast furnace wall around the taphole is the same as that around the taphole in the process of melting and melting the raw materials in the blast furnace. Deteriorated due to gas pressure increase and large pressure fluctuation.

  For this reason, the refractory around the taphole is periodically dismantled and replaced using the blast furnace closed days (about four times a year).

  For the dismantling of the above-mentioned tap outlet, a conventional breaker for crushing the refractory from the outer surface side of the furnace wall, a turning means for changing the axial direction of this breaker up, down, left and right, an elevation means, A breaker-type dismantling device comprising a rotating means and a traveling carriage on which these are loaded is used (for example, see Patent Document 1).

FIG. 11 is an explanatory view showing a configuration of a sprue port repair device having a dismantling function disclosed in Patent Document 1, wherein (a) is a side view of the spout port repair device, and (b) is a spout It is a top view of the repair apparatus of a shed. The traveling vehicle 71 has a self-propelled function and travels by operating the left and right crawlers 72. A swivel base 73 is mounted on the traveling vehicle 71 via a turning mechanism 74. The turning mechanism 74 includes a hydraulic motor 76 that rotates the pinion 75 and a ring gear 77 meshed with the pinion 75. And turn.

  On the swivel base 73, a lifting boom 79 is attached by a pivot 80. The lifting boom 79 is lifted up and down by a lifting cylinder 81 with the pivot 80 as a fulcrum. A pivot arm 82 is suspended from a free end of the lifting boom 79 by a pivot 83. The pivot arm 82 is pivoted up and down (left and right in FIG. 11) about the pivot 83 by the pivot cylinder 84. The pivots 80 and 83 are parallel to each other, and the lifting boom 79 and the rotating arm 82 rotate up and down within the same vertical plane.

  A lower narrow turning arm 86 is attached to the lower end of the turning arm 82 via a ball bearing. The inner race of the ball bearing is fixed to the rotating arm 82 with a bolt, and the outer race is fixed to the turning arm 86 with a bolt. The outer surface of the outer race is a gear and is engaged with a pinion 92 that is rotated by a hydraulic motor (turning actuator) 90. The hydraulic motor 90 turns the turning arm 86 in the circumferential direction via a pinion 92 and a gear, and is fixed to the turning arm 82.

  A rotary center joint is attached to the center of the lower end of the turning arm 82, and a rotation stop plate is attached to the turning arm 86. The rotation stop plate is locked to the rotary center joint to prevent the turning arm 86 from turning 360 degrees or more with respect to the turning arm 82.

The pivot frame 96 is attached to the lower end of the pivot arm 86 so as to be pivotable up and down by a pivot 97. An arcuate link 98 is attached to the lower part of the swing arm 86 with a pin 99, and a link 100 is attached to the lower surface of the rotating frame 96 with a pin 101. The free ends of the links 98 and 100 are connected to the piston rod 102 a of the frame cylinder 102 by a pin 103.
The cylinder 102 for frames rotates the rotating frame 96 up and down around the pivot arm 86 with respect to the pivot arm 86 via links 98 and 100, and the upper end is coupled to the pivot arm 86 by a pin 104. Yes. The pins 99, 101, 103, and 104 are parallel to the pivot 97, and the rotating frame 96 and the links 98 and 100 rotate in the same vertical plane. The links 98 and 100 prevent the portion of the pin 103 from touching the turning arm 86 when the frame cylinder 102 is reduced, and increase the turning angle θ of the turning frame 96 with the pivot 97 as a fulcrum.

A moving frame 106 is attached to the rotating frame 96 by inserting a guide rail into the guide groove. The moving frame 106 can move in the length direction of the rotating frame 96 with respect to the rotating frame 96 in the rotating surface of the rotating frame 96 with the pivot 97 as a fulcrum.
An air or hydraulic breaker 107 is attached to the moving frame 106 such that its protruding direction (operating direction) coincides with the moving direction of the moving frame 106.

  When the refractory at the outlet of the blast furnace 108 shown in FIG. 11 is crushed with this repair device, for example, the traveling vehicle 71 is placed on the iron 109 on which the hot metal flows, and the breaker 107 is placed on the breaker 107 in FIG. As shown by the solid line in FIG. Then, the breaker 107 is operated from the state of the solid line in FIG. 11, and the breaker 107 is advanced to the left in FIG. 11 together with the moving frame 106.

  The solid line in FIG. 11 shows a state in which the breaker 107 is horizontal, but when the breaker 107 is inclined upward or downward at that position, the frame cylinder 102 is expanded or contracted. FIG. 11A shows a state in which the breaker 107 is inclined upward in this way. When turning the breaker 107 horizontally at the position (A) in FIG. 11, the turning arm 86 is turned by the hydraulic motor 90. Further, when the height of the breaker 107 is changed, the lifting boom 83 is lifted by the lifting cylinder 81 and the rotating arm 82 is kept vertical by the operation of the rotating cylinder 84. FIG. 11B shows a state in which the breaker 107 is raised in the horizontal state in this way.

  The front and rear positions of the breaker 107 are determined by turning the turning arm 82 back and forth with the turning cylinder 84 or raising and lowering the raising boom 79 with the raising and lowering cylinder 81.

  The left and right positions of the breaker 107 are determined by turning the turntable 73 with the turning mechanism 74. At this time, if it is not desired to change the protruding direction of the breaker 107, the turning arm 86 is turned by the hydraulic motor 90 at the same angle as the turning angle of the turntable 73 in the direction opposite to the turn direction of the turntable 73. Further, the front / rear position of the breaker 107 changes due to the turning of the turntable 73, which is corrected by moving the moving frame 106 back and forth.

As described above, the breaker 107 is moved to a desired position, and the spout is crushed. Although the operation of moving the breaker 107 is based on the above, in practice, it is normal to move the breaker 107 in a complex manner in accordance with the situation at the site.
JP-A-8-3608

  However, in the dismantling method using the breaker-type dismantling device loaded on the conventional traveling carriage described above, the refractory around the taphole is small in the range where the breaking force of the breaker extends from the outside of the furnace wall. This is a method of excavating one part of the area, sequentially excavating the part adjacent to the excavated small part to enlarge the excavation hole, and repeating the excavation several times in the depth direction of the excavation hole. There is a problem that it takes a long time to drill an excavation hole having a constant depth and a constant cross section around the mouth.

Further, in the dismantling method using the conventional dismantling apparatus, since the mechanism for freely changing the excavation position and excavation direction of the breaker is complicated, it is not always possible to perform a small-turning operation, and it is almost impossible in the depth direction. Only excavation holes with the same cross-section can be excavated. However, the range of refractories that need to be dismantled is not necessarily the same at each position in the thickness direction of the furnace wall. There is a problem in that it cannot be removed sufficiently, and manual work by a rock drill or the like is required, forcing high-temperature unsafe work.
The present invention has been made to solve the above-described problems of the prior art, and can dismantle the refractory centering on the taphole in a short time, and can also excavate the hole after dismantling. An object of the present invention is to provide a method and a disassembling auxiliary device for a sprue port that can form a cross-sectional shape at each position in the depth direction into a required shape.

  In the method of dismantling a taphole according to the present invention, after excavating a plurality of excavation holes having a constant diameter and a predetermined depth from the outer surface of the furnace wall around the excavation entrance into the furnace, the refractory remaining between the excavation holes is removed. It breaks down and dismantles.

The method for dismantling the taphole according to the present invention excavates a plurality of drilling holes having a constant diameter and a certain depth from the outer wall surface of the furnace wall in the vicinity of the taphole into the furnace prior to dismantling, and then remains between the drilling holes. Since the refractory is only broken down and disassembled, disassembly is easy and the time required for disassembly can be shortened.
In the excavation of the excavation hole, a drill having an excavation blade having a size capable of performing excavation in a range corresponding to the diameter of the excavation hole at a time may be used. Less time is required for excavation.

  Further, a first taphole disassembly assisting device according to the present invention is a disassembly assisting device used for drilling the plurality of excavation holes in the taping port disassembly method, and the plurality of excavation holes Drilling means for drilling a hole, guide means for suspending the hole drilling means, moving forward and backward, and moving in the left-right direction, elevating means for raising and lowering the guide means together with the drilling means, and the elevating and lowering means It comprises a gantry for raising and lowering the means and a turning means for turning the hole making means around a horizontal axis.

  By using the first depot opening disassembly assisting device according to the present invention, a plurality of drill holes having a constant diameter and a certain depth from the outer wall surface of the furnace wall to the inside of the furnace are efficiently drilled. Therefore, the remaining refractory can be reduced, and the sprue opening can be disassembled in a short time.

  Further, the second demolition opening disassembly assisting device according to the present invention is a disassembly assisting device used for excavating both side surfaces of the dismantling hole and forming it into a required shape, and a forming excavating means, Boom means for extending the excavating means; holding means for holding the boom means together with the excavating means; forward / reverse means for moving the holding means forward and backward; and The horizontal direction rotating means for rotating in the horizontal direction around the vertical axis, and the vertical direction rotating means for rotating the boom means in the vertical direction around the horizontal axis.

  Since the disassembly assisting device for the second tap opening according to the present invention can efficiently excavate both side surfaces of the dismantling hole into a required shape, the dismantling operation by a human power in a high temperature atmosphere is not required, Can be safely done.

  According to this invention, the dismantling work of the taphole can be performed safely in a short time.

  The best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing the best embodiment of the method for dismantling the taphole of the present invention. As shown in FIG. 1, this method of dismantling the taphole is provided with a furnace over the planned dismantling range of the refractory constituting the furnace wall 3 around the taphole facing the taphole 2 provided on the cast floor 1. After excavating a plurality of excavation holes 4 having a predetermined diameter D and a predetermined length from the outer surface side of the wall 3, the refractory 5 (shown by oblique lines) remaining between adjacent excavation holes 4 is crushed to dismantle Is what you do.

  An example of a drilling hole is as follows. A plurality of excavation holes 4 having a diameter of 200 mm and a depth of 1200 mm are as close as possible both vertically and horizontally and vertically within a range of 800 mm in width and 1100 mm in height with the tap hole as the center. Drill in condition.

  Thus, by excavating the plurality of excavation holes 4 in advance, the amount of the refractory 5 remaining in the planned dismantling range is extremely small with respect to the planned dismantling amount. The time required for dismantling with the conventional breaker-type dismantling device is short.

  In addition, the excavation of the excavation hole 4 is carried out by using a drill for exclusive use of the excavation hole having the same diameter as the excavation hole 4 so that the size of the excavation hole is gradually expanded. Can be shortened.

  Accordingly, excavation of the plurality of excavation holes 4 can be made shorter than the time required for crushing with a conventional breaker, and the removal of the remaining refractory is facilitated. Can be shortened.

  Next, the best mode for disassembling assisting device of the first tap outlet of the present invention will be described. FIG. 2 is an explanatory view showing the best mode of the first depot opening disassembly assisting device of the present invention, wherein (a) is a plan view of the disassembly assisting device, and (b) is a side view of the disassembly assisting device. FIG.

  This disassembly assisting device is a sprue port dismantling drilling device used for drilling a drilling hole by the above-described sprue port dismantling method of the present invention, and for drilling the plurality of drilling holes 4 A drilling mechanism 11, a guide cell 12 for suspending the drilling mechanism 11 so as to be able to move forward and backward, a drive mechanism 13 provided on the guide cell 12 to move the drilling mechanism 11 back and forth in the excavation direction, A lifting frame 14 that lifts and lowers the guide cell 12 together with the drilling mechanism 11, and a traversing mechanism 15 that moves the guide cell 12 along the drilling mechanism 11 in the direction orthogonal to the drilling direction on the lifting frame 14, A turning mechanism 16 for turning the guide cell 12 suspended from the lifting frame 14 around the horizontal axis together with the drilling mechanism 11 and a frame body 17 for raising and lowering the lifting frame 14 while guiding it. And composed of It has been.

  In detail, the drilling mechanism 11 includes a drifter 18 that repeatedly generates a striking force, a bit 19 that drills the drilling hole 4 in the refractory by the repetitive striking force of the drifter 18, and a drifter-18. And a bit rod 20 for transmitting the repeated striking force to the bit 19.

  As an example of the drifter 18, a pneumatic cylinder for repeatedly generating a striking force has a cylinder diameter of 140 mm, a piston stroke of 90 mm, a striking force of 32 kg-m, and a striking number of every air blow. 1550 minutes.

  Moreover, the rotating mechanism which rotates the bit rod 20 is also provided, and the bit rod 20 can be rotated 0-300 per minute.

  FIG. 3 is an explanatory view of the drive mechanism 13 of the guide cell 12 for suspending the hole drilling mechanism 11 in the first spear opening disassembly assisting device of the present invention, (a) is a plan view, (b). Is a side view.

    The guide cell 12 includes two guide members 21 arranged in parallel at intervals, a plurality of spacing members 22 connecting the two guide members 21, and two brackets provided on the upper surface of the guide member 21. 23 and 24.

  The drive mechanism 13 includes sprocket wheels 25 and 26 provided in the vicinity of the front and rear ends of the guide member 21 and an endless drive chain 27 hung between the sprocket wheels 25 and 26. And a drive motor 28 which is provided on the guide member 21 and drives the drive chain 27.

  The drifter 18 is suspended from a portion of the drive chain 27 located below the sprocket wheels 25 and 26 so that the entire drilling mechanism 11 moves forward and backward along the two guide members 21. A drill mount portion 29 is connected, and the drill mount portion 29 moves forward and backward as the drive chain 27 is driven.

  FIG. 4 is a diagram showing a configuration of the drill mount portion 29 in the first spear opening disassembly assisting device of the present invention. The drill mount portion 29 is rotatable to the connection member 30 connected to the drifter 18, a wheel locking member 31 provided orthogonal to both ends of the connection member 30, and the wheel locking member 31. It is comprised from the provided wheel 32, and the wheel 32 moves along the guide member 21 comprised by two angle steel. In the figure, only two wheels 32 are shown, but in reality, two pairs of wheels 32 are provided before and after the connecting member 30, respectively.

FIGS. 5A and 5B are explanatory diagrams of the lifting frame 14 in the first spear opening disassembly assisting device of the present invention, where FIG. 5A is a plan view and FIG. 5B is a view taken along the line AA in FIG. It is. The elevating frame 14 includes two liftable frames 33 arranged at intervals in parallel with the traveling direction of the hole drilling mechanism 11, and two connection members 34a for connecting the two liftable frames 33. Connecting frames 34 and 35 comprising 34b, four lifting wheels 36 rotatably provided near the front and rear ends of both liftable frames 33, and the outside of both liftable frames 33. It is comprised from the portal-shaped connection members 37a and 37b which connect the cylinder rod of the raising / lowering cylinder (it mentions later) provided in this.

  A moving plate 38 is disposed below the connection frame 34, and a moving plate 39 is disposed above the connection frame 35. The connection plate 34 and 35 are arranged in the longitudinal direction. It can be moved along the direction (perpendicular to the excavation direction).

  A bracket 40 is provided on the lower surface of the moving plate 38, and a bracket 41 is provided on the upper surface of the moving plate 39, respectively.

  The bracket 40 on the lower surface of the moving plate 38 is pivotally connected to a bracket 23 provided on the upper surface of the guide member 21 of the guide cell 12 via a pin, and the bracket 41 on the upper surface of the moving plate 39 is Similarly, it is connected with a cylinder rod (described later) of a turning hydraulic cylinder of a turning mechanism provided on the upper surface of the guide member 20 of the guide cell 12 by a pin.

  Further, a chain 42 for traversing the guide cell 12 is disposed between the connection members 34a and 34b of the connection frame 34 along the longitudinal direction of the connection members 34a and 34b.

  FIG. 6 shows a mechanism for moving the aforementioned moving plate 38 along the longitudinal direction of the connecting frame 34 in the first spear opening disassembly assisting device of the present invention, that is, on the lifting frame 14. It is explanatory drawing of the traversing mechanism 15 which moves the guide cell 12 in the direction orthogonal to a digging direction with the hole drilling mechanism 11 again.

  A pair of left and right rollers 43a and 43b are rotatably attached via support members 44 in the vicinity of the front and rear ends of the upper surface of the moving plate 38 (in the moving direction (transverse direction, direction orthogonal to the excavating direction)). One roller 43a is on the lower flange of the connecting member 34a made of H-shaped steel of the connecting frame 34, and the other roller 43b is a connecting member made of H-shaped steel of the connecting frame 34. The vehicle can run on the lower flange of 34b.

  Further, a pair of left and right connecting members 45 are perpendicular to the plate surface of the moving plate 38 outside the position where the pair of left and right rollers 43a and 43b on the upper surface of the moving plate 38 are attached. A support plate 47 for supporting the traverse hydraulic motor 46 is horizontally supported on the pair of left and right connection members 45.

  A rotating tooth (not shown) attached to the rotating shaft of the traverse hydraulic motor 46 meshes with the chain 42 described above, and by driving the traverse hydraulic motor 46, The moving plate 38, that is, the guide cell 12 can be traversed.

  In addition, by moving the guide cell 12 as described above, the moving plate 39 connected to the guide cell 12 via the rotating hydraulic cylinder and the bracket 41 also moves on the connecting frame 35. To do.

  FIG. 7 is an explanatory view of a rotation mechanism 16 that rotates the guide cell 12 in the first spear opening disassembly assisting device of the present invention around the horizontal axis together with the hole drilling mechanism 11. As described above, the guide cell 12 can be rotated via the bracket 40 by the bracket 23 provided on the upper surface thereof, and can be moved up and down via the rotating cylinder 47 by the bracket 24 also provided on the upper surface. It is connected to the lift frame 14 as possible.

  Therefore, when the rotating cylinder 47 is operated, the guide cell 12 is rotated around the pin 48 that rotatably connects the bracket 23 and the bracket 40 so as to be inclined.

  FIGS. 8A and 8B are explanatory views of the frame 15 for guiding the lifting frame 14 in the first depot opening disassembly assisting device of the present invention, where FIG. 8A is a plan view and FIG. 8B is a front view. (C) is a side view.

  The frame 15 includes four H-shaped steel columns 49 provided at the four corners of the frame 15, and two H-shaped steel columns 49 arranged along the excavation direction among the four H-shaped steel columns 49. A total of four vertical frames 50 connected at the upper and lower ends, and two H-shaped steel columns 49 positioned in a direction perpendicular to the excavation direction among the four H-shaped steel columns 49 at the upper end. It consists of two horizontal frames 51 to be connected.

  As shown in FIG. 9, a cylinder rod 52a connected to the gate-shaped connecting members 37a and 37b of the elevating frame 14 and a cylinder connected to the lower vertical frame 50 of the frame 15 By operating the lifting cylinder 52 consisting of 52b, the lifting frame 14 moves up and down in a state where the four wheels 36 are guided by the inner surfaces of the four H-shaped steel columns 49. It has become.

  Since the first taphole disassembly assisting device of the present invention is configured as described above, it efficiently drills a plurality of excavation holes in the refractory around the taphole scheduled for dismantling, Since the remaining refractories can be reduced, the dismantling work of the tap outlet, which previously took 32 hours, can be reduced to half of 16 hours.

  Next, the best embodiment of the second spear opening disassembly assisting device of the present invention will be described. FIGS. 10A and 10B are explanatory views showing the best mode of the second spear opening disassembly assisting device of the present invention, wherein FIG. 10A is a plan view of the disassembling assisting device, and FIG. 10B is a side view of the disassembling assisting device. FIG.

  This disassembly assisting device is a disassembly assisting device that is used to excavate both side surfaces of a dismantling hole that has been dismantled and form it into a required shape. The disassembly assisting device 61 and the forming drifter 61 , A boom 63 that connects the drifter slide 62 at one end, and the other end of the boom 63 pivots around the pin 64 in the horizontal and vertical directions. A boom support base 65 for supporting the boom, a drifter slide cylinder 66 for sliding the boom support base 65 in the longitudinal direction of the boom 63, and the boom 63 for the pin 64. A drifter swing cylinder 67 that rotates in the horizontal direction around the lift, a drifter lift cylinder 68 that rotates the boom 63 in the vertical direction around the pin 64, and the boom support base 65. No Frame for guiding the id - and a beam 69 Metropolitan. In the figure, reference numeral 70 denotes a moving wheel provided on the boom support base 65 for moving the support base 65 smoothly along the frame 69.

  The range in which the boom 63 can move forward in this disassembly assisting device is 1350 mm, and the range in which the boom 63 can swing in the horizontal direction is ± 15 ° across the straight line center line of the boom 63, and the boom 63 The lift angle is 25 °.

  The distance that the molding drifter 61 of the drifter slide 62 can be slid in the excavation direction is 150 mm, and the molding drifter 61 is rotated 180 degrees, that is, the excavation direction is changed to the opposite direction) Also have.

  Therefore, it excels at both sides of the dismantled hole that has been dismantled, and has sufficient ability to form into the required shape. By using this device, It is no longer necessary to perform the molding work, and the safety of the work in the dismantling work of the taphole can be improved.

It is explanatory drawing which shows the best embodiment of the dismantling method of the taphole of this invention. It is explanatory drawing which shows the best embodiment in the disassembly assistance apparatus of the 1st tap opening of this invention, (a) is a top view of a disassembly assistance apparatus, (b) is a front view of a disassembly assistance apparatus, (c) ) Is a side view of the disassembly assisting device. It is explanatory drawing which shows the drive mechanism of the guide cell of the disassembly assistance apparatus of the 1st tap opening of this invention, (a) is a top view, (b) is a side view. It is a figure which shows the structure of the drill mount part in the disassembly assistance apparatus of the 1st tap hole of this invention. It is explanatory drawing of the raising / lowering frame in the disassembly assistance apparatus of the 1st taphole of this invention, (a) is a top view, (b) is an AA arrow directional view of (a). It is explanatory drawing of the mechanism (transverse mechanism) which moves the movement plate in the longitudinal direction of a connection frame in the disassembly assistance apparatus of the 1st sprue opening of this invention. It is explanatory drawing of the rotation mechanism of the guide cell in the disassembly assistance apparatus of the 1st sprue opening of this invention. It is explanatory drawing of the frame for guiding the raising / lowering frame in the disassembly assistance apparatus of the 1st tap opening of this invention, (a) is a top view, (b) is a front view, (c) is a side view FIG. It is explanatory drawing of the raising / lowering mechanism of the raising / lowering frame in the disassembly assistance apparatus of the 1st tap opening of this invention. It is explanatory drawing which shows the best embodiment in the disassembly assistance apparatus of the 2nd tap opening of this invention, (a) is a top view of a disassembly assistance apparatus, (b) is a side view of a disassembly assistance apparatus. It is explanatory drawing which shows the structure of the conventional repairing device of a sprue opening which has a dismantling function, (a) is a side view of a sprue opening repair device, (b) is a top view of a sprue repair device. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cast floor 2 Unloading 3 Furnace wall 4 Drilling hole 5 Refractory material 11 Drilling mechanism 12 Guide cell 13 Drive mechanism 14 Lifting frame 15 Traverse mechanism
16 rotation mechanism 17 frame 18 drifter
19-bit 20-bit rod 21 guide member 22 spacing member 23, 24 bracket 25, 26 sprocket wheel 27 drive chain 28 drive motor
29 Drill Mount 30 Connection Member 31 Wheel Locking Member 32 Wheel 33 Liftable Frame 34, 35 Connection Frame 36 Wheel 37a, 37b Connection Member 38, 39 Moving Plate 40, 41 Bracket 42 Chain 43a, 43b Roller 44 Support member 45 Connection member 46 Traverse hydraulic motor
47 Cylinder for rotation
48 pin 49 H-shaped steel column 50 Vertical frame 51 Horizontal frame 52 Lifting cylinder
61 Drifter for molding
62 Drifter Slide 63 Boom 64 Pin 65 Boom Support Base 66 Drifter Slide Cylinder
67 Drifter-Swing Cylinder-
68 Drifter-Lift Cylinder-
69 Frame 70 Moving wheel

Claims (3)

    After excavating a plurality of excavation holes having a constant diameter and a predetermined depth from the outer surface of the furnace wall in the vicinity of the excavation port into the furnace, the refractory remaining between the excavation holes is crushed and dismantled Mouth dismantling method.   The dismantling auxiliary device used for excavating the plurality of excavation holes in the method of dismantling the taphole according to claim 1, a drilling means for drilling the plural excavation holes, and the drilling hole Guide means for suspending the means so as to be able to move forward and backward, longitudinal drive means provided on the guide means for moving the drilling means forward and backward, lifting means for raising and lowering the guide means together with the drilling means, and the lifting means A disassembly assisting device comprising: a frame body for raising and lowering the oscillating member; and a rotating means for rotating the hole drilling means about a horizontal axis.   A disassembly assisting device used for excavating both side surfaces of the dismantling hole of the tap hole and forming it into a required shape, a excavating means for forming, and a boom means for extending the excavating means, A holding means for holding the boom means simultaneously with the excavating means, a forward / backward moving means for moving the holding means forward and backward, and a horizontal rotation for rotating the boom means horizontally around a vertical axis. A spear opening disassembly assisting device comprising a moving means and a vertical turning means for turning the boom means in a vertical direction around a horizontal axis.

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