JP2006292227A - Furnace dismantling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute work while especially keeping a temperature of a furnace to be dismantled in a comparatively high temperature, in a furnace dismantling machine dismantling the furnace by breaking a structure such as brick disposed inside a furnace body of a melting furnace, a converter, an incinerator or the like. <P>SOLUTION: This dismantling machine dismantling the furnace by breaking the structure such as the brick disposed inside the furnace body has: an air breaker 11 for breaking the structure; an equipment body 2 having at least a heat-resistant driver's cab 32 for operating the air breaker 11 by a worker; a movement mechanism 3 or a turn part 40 for moving or turning the equipment body 2 to the furnace body made to fall on its side; and a manipulator 5 performing position control of the air breaker 11 installed to the tip of a boom 4 in an angle variable state by expanding/contracting or rotating the boom 4 to the furnace body from the equipment body 2. The equipment body jets supplied cooling air to the air breaker 11 and into the manipulator 5 through a hose 27 disposed along the boom. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a furnace demolition machine that dismantles a furnace by crushing a structure such as a brick disposed inside a furnace body such as a melting furnace, a converter, or an incinerator.

  The converter is a refining furnace for steelmaking that accepts molten pig iron (hot metal) and blows in oxygen to burn and remove impurities in the hot metal, and the furnace body is centered on a horizontal support shaft. It has a rotating structure.

  As shown in FIG. 7, the converter 193 is formed of a hollow concentric container, and a furnace port 194 having a large opening is formed at the center of the furnace top. Usually, oxygen for refining is blown through the furnace port 194 or gas generated in the furnace is discharged. Further, this converter is designed to withstand high-temperature molten metal by covering the inner surface of the iron skin forming the outer surface with a brick 195 and further building a refractory brick inside thereof.

  By the way, the bricks 195 arranged on the inner surface of such a converter are mainly refractory bricks, but there are not a few cases where the bricks 195 are damaged due to high temperatures, so the damaged bricks 195 are crushed. As a result, dismantling work, repair work for arranging new bricks 195 in the furnace, and the like are frequently performed.

  Conventionally, workers have entered the inside of the furnace to carry out such dismantling work, but the inside of the furnace immediately after steel is very hot, reaching about 500 ° C to 1000 ° C. Moreover, it is difficult to cool down, and even after 4 hours have passed since the water was injected, it is close to 80 ° C, and a long waiting time is required until the temperature drops to a level that the operator can withstand working inside the furnace. It was.

  In order to solve such problems, for example, a melting furnace dismantling apparatus shown in Patent Document 1 has been proposed.

As shown in FIG. 8, the melting furnace disassembling apparatus 101 includes a girder portion 107 installed substantially horizontally above the electric furnace 103, a revolving body 109 provided so as to be able to turn 360 ° around the axis P, An outer boom 111, an inner boom 113, and a breaker 115 that are swingably provided on the swivel body 109 are configured as main parts, and the refractory brick 105 is crushed by operating the breaker 115. The turning body 109 and the outer boom 111 are swung from an operation unit (not shown). According to the melting furnace dismantling apparatus 101, since the operation can be performed from the outside of the electric furnace 103, the operation can be started even at a high temperature that an operator cannot enter.
JP-A-11-230680

  However, in the disclosed technique in the above-mentioned Patent Document 1, it is essential to equip a horizontally movable girder equipped with a manipulator for dismantling a furnace and a rotating device in the girder. There was a problem that the cost would increase significantly.

  Further, in the disclosed technique in Patent Document 1, the operation of the apparatus is performed away from the furnace for performing the dismantling work, and the driver's heat countermeasures are sufficiently taken, while the details of the dismantling work are visually confirmed. There was also a problem that some parts could not be done.

  Furthermore, with the disclosed technique in Patent Document 1, actual work could not be started until the temperature inside the furnace decreased to the heat resistant temperature at the tip of the breaker 115 and the heat resistant temperature of the manipulator. If this waiting time is included, there is also a problem that the construction time increases drastically. That is, it is necessary to shorten the construction time by starting the work without waiting for the cooling of the furnace.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is a structure such as a brick disposed inside a furnace body such as a melting furnace, a converter, or an incinerator. An object of the present invention is to provide a furnace demolition machine that can perform operations while maintaining the temperature of the furnace to be dismantled at a relatively high temperature in a furnace demolition machine that dismantles the furnace.

  In order to solve the above-described problems, a furnace demolition machine to which the present invention is applied breaks a structure such as a brick disposed inside a furnace body such as a melting furnace, a converter, an incinerator, etc. In an oven demolition machine, an air breaker for crushing a structure, an apparatus main body having at least a heat-resistant operation room for an operator to operate the air breaker, and the apparatus main body with respect to the overturned furnace body The position of the air breaker attached to the front end of the air breaker with a variable angle can be controlled by moving and swiveling means for moving or swiveling, and by expanding and contracting and rotating the boom from the equipment body to the furnace body. The apparatus main body injects the supplied cooling air into the inside of the manipulator and the air breaker through a hose disposed along the boom.

  In the furnace demolition machine to which the present invention is applied, even when the inside of the furnace body is in a high temperature state, it is possible to suppress the heat damage of the air breaker. In particular, by providing a guard around the arm, it is possible to send cooling air to the air breaker with high efficiency, to further improve the heat resistance of the air breaker, and to be in a high temperature state. It is also possible to suppress heat damage from the furnace body.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  1-4 has shown the structure of the furnace demolition machine 1 to which this invention is applied. 1 is a perspective view of the furnace demolition machine 1, FIG. 2 is a side view of the furnace demolition machine 1, FIG. 3 is a plan view of the furnace demolition machine 1, and FIG. It is a front view.

  The furnace demolition machine 1 dismantles a structure such as a brick disposed inside a furnace body such as a melting furnace, a converter, an incinerator, etc. Air breaker 11 for crushing, moving mechanism 3 for moving apparatus main body 2 with respect to the overturned furnace body, and boom 4 attached to the upper part of apparatus main body 2 and the angle of the tip thereof being variable. And a manipulator 5 for controlling the position of the air breaker 11 attached to the air breaker 11.

  The moving mechanism 3 includes a caterpillar 31 and travels on the ground by driving the caterpillar 31. The moving mechanism 3 supports the device main body 2 disposed on the upper portion thereof via a turning portion 40 so as to be turnable in parallel with the upper surface of the moving mechanism 3. The device body 2 is rotated 360 ° with respect to the moving mechanism 3 by a hydraulic motor or the like. In addition, the moving mechanism 3 can be moved freely in the direction A in FIGS. For this reason, the apparatus main body 2 itself can be freely moved close to and away from the furnace.

  A boom 4 is supported on the device main body 2 so as to be able to rotate and move up and down, and a boom cylinder 39 is connected between the device main body 2 and the boom 4. A heat-resistant operation room 32 is provided on the front side of the device body 2. The heat-resistant operation room 32 is provided with a control device (not shown) that is sufficient for at least an operator to operate the air breaker 11. Since the worker can directly observe the air breaker 11 from the heat-resistant operation room 32, the work can be reliably performed. Further, a guard 33 made of heat-resistant glass or the like is provided on the front surface of the heat-resistant operation room 32 so that heat from the outside is hardly transmitted to the heat-resistant operation room 32.

  An air compressor 24 is attached to the device body 2. The air compressor 24 is packed with air necessary for the operation of the air breaker 11 in a compressed state.

  The manipulator 5 includes a boom 4 and an arm 6 that is rotatably supported at the tip of the boom 4 and to which the air breaker 11 is attached.

  The boom 4 has an outer boom 41, a rotating boom 42, and a telescopic boom 43, and the arm 6 described above is supported at the tip of the telescopic boom 43. Further, an arm cylinder (actuator) 9 is connected between the middle part of the boom 4 and the arm 6. That is, the arm 6 is rotatable about the connecting portion 3 a between the boom 4 and the arm 6 based on the expansion and contraction of the arm cylinder 9.

  The outer boom 41 is disposed so that it can be raised and lowered around the connecting portion 4 a with the device body 2 based on the expansion and contraction of the boom cylinder 39. A rotating boom 42 is disposed at the tip of the outer boom 41 via a bearing 46 so as to be rotatable with respect to the outer boom 41. The rotating boom 42 rotates in an arbitrary direction based on the power generated by the turning motor 47.

  A telescopic boom 43 is housed in the outer boom 41 and the rotating boom 42. The telescopic boom 43 is connected to a hydraulic cylinder 45, and when the hydraulic cylinder 45 is extended, the telescopic boom 43 protrudes and extends with respect to the outer boom 41 and the rotating boom 42. When 45 is contracted, the telescopic boom 43 is contracted with respect to the outer boom 41 and the rotating boom 42, and as a result, is housed in the outer boom 41 and the rotating boom 42. Incidentally, the telescopic boom 43 may be provided by a roller 48 provided at the tip of the rotating boom 42, and the telescopic boom is rotated with respect to the outer boom 41 and the rotating boom 42 through the rotation of the roller 48. You may make it expand and contract more smoothly than 43.

The arm 6 is rotatably attached via a rotating shaft 95 attached to the connecting portion 3a at the distal end of the telescopic boom 43. Two arm cylinders 9 attached to the telescopic boom side are rotatably attached via a shaft portion 92 that is telescopic in the storage case 91 and fulcrum pins 93a and 93b formed on the shaft portion 92. The support shafts 94a and 94b are provided, and a rotation shaft 95 inserted through the connecting portion 3a is rotatably provided at the tip of the support shaft 94a. The entire arm 6 rotates according to the rotation of the rotary shaft 95, and the angular direction of the tip of the air breaker 11 also changes accordingly. That is, in the arm 6, in the arm cylinder 9, the shaft portion 92 is expanded and contracted with respect to the storage case 91, whereby the support shafts 94 a and 94 b are operated via the fulcrum pins 93 a and 93 b, and as a result, the rotation shaft 95 is moved. By rotating, the entire arm 6 can be rotated.

  The air breaker 11 is pivotally supported so as to be swingable in the vertical direction by operating the air cylinder 12. The air cylinder 12 is expanded and contracted based on the air sent from the air compressor 24. Moreover, you may make it improve the crushing efficiency of a structure by providing the chisel comprised so that it may become small as it approaches the front-end | tip about the diameter of this air breaker 11. FIG. In addition, the air breaker 11 may be capable of swinging in the left-right direction around a shaft support (not shown).

  In addition to the configuration described above, in the furnace demolition machine 1 to which the present invention is applied, a hose 27 for feeding cooling air is disposed along the boom 4. The hose 27 is disposed along the inner peripheral wall 41 a of the outer boom 41, and is further guided from the outer boom 41 together with other cords and the like toward the air breaker 11 after protruding from the outer boom 41. A nozzle 29 is attached to the tip of the hose 27, and the cooling air supplied from the outside is conveyed by the hose 27 and injected from the nozzle 29. As a result, the cooling air is distributed in the telescopic boom 43. That is, the cooling air jetted from the nozzle 29 reaches the air breaker 11 through a path indicated by an arrow in FIG. The air breaker 11 is cooled by the cooling air, so that the main body of the air breaker 11 can be protected from high temperature and wear of the chisel can be reduced. The configuration of the nozzle 29 can be omitted.

  In the furnace demolition machine 1 to which the present invention is applied, a guard 61 may be provided around the arm 6 as shown in FIGS. The guard 61 may be disposed so as to cover all the surfaces of the arm 6, or may be disposed so as to cover at least the surface of the position. As a result, the cooling air sprayed from the hose 27 can be guided to the air breaker 11 without escaping to the outside, and the cooling efficiency to the air breaker 11 can be improved.

  Next, an operation of crushing a structure 52 such as a brick disposed in the furnace body 51 by the furnace demolition machine 1 to which the present invention is applied will be described with reference to FIG.

  First, the main body of the furnace demolition machine 1 is moved by the moving mechanism 3 to the vicinity of the furnace opening 53 in the furnace body 51. And the apparatus main body 2 is brought close to the furnace body 51 by driving the moving mechanism 3 in the C direction.

  Next, as shown in FIG. 5, by extending the hydraulic cylinder 45, the telescopic boom 43 itself connected to the hydraulic cylinder 45 protrudes from the outer boom 41 and the rotating boom 42 and extends. As a result, the arm 6 attached to the tip of the telescopic boom 43 reaches the vicinity of the structure 52 to be crushed. At this time, the rotating boom 42 may be rotated with respect to the outer boom 41.

  Next, the arm cylinder 9 is expanded and contracted to rotate the rotating shaft 95 and rotate the arm 6 itself. As a result, the tip of the air breaker 11 can be directed in a desired angular direction. At this time, the rotating operation of the rotating boom 42 described above may be simultaneously performed in parallel. Next, the air cylinder 12 is expanded and contracted by the air sent from the air compressor 24. As a result, the structure 52 disposed in the furnace body 52 can be crushed.

  As described above, the furnace demolition machine 1 to which the present invention is applied is constituted by a self-propelled type by the moving mechanism 3 in order to improve workability. In comparison, the apparatus configuration can be greatly simplified, and as a result, the cost of the entire system can be reduced. In addition, since the furnace demolition machine 1 is configured to be self-propelled, the apparatus main body 2 can be arranged at an optimal position in accordance with the furnace equipment.

  Further, in the furnace demolition machine 1, the manipulator 5 is provided with a slide function rotation and a rotation function, so that the tip of the air breaker 11 can be accurately adjusted to a desired position in the furnace body 51. Therefore, it is possible to hit the wall surface of the structure 52 on the wall through the air breaker 11.

  FIG. 6 shows a case where the boom 4 is raised and lowered by expanding and contracting the boom cylinder 39. By extending and retracting the boom cylinder 39, the outer boom 41 is raised and lowered around the connecting portion 4a. Thereby, the structure 52 arranged on the side surface of the furnace body 51 can be effectively crushed.

  Incidentally, when the structure 52 is being crushed, the cooling air is sprayed from the hose 27 so that the cooling air is distributed in the telescopic boom 43 and thus the air breaker 11 around which the crushing operation is performed. It becomes possible to send the cooling air up to. As a result, the air breaker 11 is cooled by the cooling air. Incidentally, this cooling air may be distributed not only to the air cylinder 11 or the telescopic boom 43 but also to the entire manipulator 24.

  For this reason, in the furnace demolition machine 1 to which the present invention is applied, it is possible to suppress the heat damage of the air breaker 11 even when the inside of the furnace body 51 is in a high temperature state. In particular, by providing a guard 61 around the arm 6, the cooling air can be sent to the air breaker 11 with high efficiency, and the heat resistance characteristics of the air breaker 11 can be further improved. It is also possible to suppress heat damage from the furnace body 51 in a high temperature state. That is, even if the temperature inside the furnace body 51 exceeds the heat resistant temperature of the air breaker 11, the air breaker 11 itself can be cooled to the heat resistant temperature or less by the cooling air. As a result, the disassembling operation can be started without waiting until the temperature inside the furnace body 51 drops to the heat resistant temperature at the tip of the air breaker 11 and further to the heat resistant temperature of the manipulator 5. Furthermore, it becomes possible to make the air breaker 11 last longer and to reduce the repair cost.

  In particular, in the furnace demolition machine 1, such a cooling function can be realized with a very inexpensive configuration such as the hose 27 and the nozzle 29, and the entire system can be manufactured at a lower cost. Further, since the entire system is not complicated, repair work can be easily performed.

  Therefore, it is possible to reduce the waiting time for the dismantling work, and the construction time can be shortened. In addition, since the dismantling operation can be performed while keeping the furnace temperature high, it is possible to save time and fuel for raising the temperature when melting again, and it is possible to reduce costs. Become.

  In particular, in the furnace demolition machine 1 to which the present invention is applied, it is possible for an operator to get into the heat-resistant operation room 32 and to directly check the work situation inside the furnace body 51. Since the heat resistance measures as described above are taken, this work environment can be further improved.

It is a perspective view of the furnace demolition machine to which this invention is applied. It is a side view of the furnace demolition machine to which the present invention is applied. It is a top view of the furnace demolition machine to which this invention is applied. It is a front view of the furnace demolition machine to which the present invention is applied. It is a figure for demonstrating operation | movement of the furnace demolition machine to which this invention is applied. It is another figure for demonstrating about operation | movement of the furnace demolition machine to which this invention is applied. It is a figure for demonstrating per prior art. It is another figure for demonstrating per prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Furnace dismantling machine 2 Equipment main body 3 Movement mechanism 4 Boom 5 Manipulator 6 Arm 11 Air breaker 24 Air compressor 27 Hose 31 Caterpillar 32 Heat-resistant operation room 33 Guard 39 Boom cylinder 40 Turning part 41 Outer boom 42 Rotating boom 43 Telescopic boom 45 Hydraulic cylinder 48 Laura

Claims (3)

In a furnace demolition machine that dismantles the furnace by crushing a structure such as a brick disposed in the furnace body such as a melting furnace, a converter, an incinerator,
An air breaker for crushing the structure;
An apparatus main body having at least a heat-resistant operation room for an operator to operate the air breaker;
Moving swivel means for moving or swiveling the apparatus main body with respect to the roll-over furnace body;
A manipulator for controlling the position of the air breaker attached to the tip of the boom by extending and contracting and rotating the boom from the apparatus main body to the furnace body;
The apparatus main body injects the supplied cooling air into the inside of the manipulator and the air breaker through a hose disposed along the boom. The furnace demolition machine according to claim 1, wherein the manipulator is provided with a cover for guiding the injected cooling air to the air breaker. The furnace dismantling machine according to claim 1 or 2, wherein a nozzle for injecting the cooling air is provided at a tip of the hose.

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