JP2005068757A - Method and device for demolishing chimney - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for demolishing a chimney remarkably improving the work environment and operating efficiency of an operator without polluting a peripheral environment in the case of the demolition works of the chimney. <P>SOLUTION: A work stage 23 on which a demolition robot 24 demolishing the chimney from the outside is placed is lifted up to the top section of the chimney by driving an extension jack 25 gripping a steel-pipe rod 17 disposed in upright on the outer periphery of the chimney and being vertically moved. The demolition robot 24 and an electric hoist 44 are installed to a ceiling section 40 formed by developing a part of a frame constituting the stage 23. A decontamination robot 43 washing and demolishing the chimney from the inside is hung down from the hoist 44 in a freely vertically movable manner. The chimney is washed from the inside or demolished, the stage 23 is lowered at every fixed quantity by using the jack 25 and a chimney section at a place higher than the stage 23 is broken from the outside by the robot 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chimney demolition method and a chimney demolition apparatus for dismantling a chimney used in an incineration facility, a boiler, or the like.

  Some chimneys used in incineration facilities, boilers, etc. have a heat-resistant brick assembled by providing a gap inside the reinforced concrete frame so that the heat of the combustion gas is not directly transmitted to the frame.

  As a method of dismantling such a chimney from the outside, a concrete crusher is suspended with a crane truck, and a method of dismantling the chimney enclosure concrete from the top of the chimney, a working scaffold temporarily covering the chimney with a steel work frame, There is known a construction method in which an operator gets on a temporary work scaffold with a load on a chimney and is dismantled by human power. On the other hand, as a method of dismantling such a chimney from the inside, a gondola as a working scaffold is suspended inside the chimney and dismantled by human power, or a claw arrow or the like is inserted in the gap between the chimney enclosure concrete and the heat-resistant brick A construction method of dropping a heat-resistant brick into the chimney is known.

  By the way, some chimneys used in incineration facilities, boilers, and the like have fly ash containing a high concentration of harmful substances such as dioxin deposited on the inner wall surface of the chimney. Therefore, in the construction method using a crane vehicle, the chimney itself has a high altitude, so that dust containing dioxins may be scattered over a wide area and contaminate the surrounding environment. Also, in order to suspend the gondola in the chimney, you must wear a level 3 dioxin protective clothing (sealed chemical protective clothing, chemical protective gloves, chemical protective shoes, airline mask, etc.). In other words, it is dangerous work and difficult work.

  In addition to these problems, the construction method that temporarily installs a steel work frame is a high-risk work and is dangerous, and the construction method that temporarily installs a work scaffold with a load on the chimney is not suitable for an aged chimney. There's a problem. Moreover, it takes time to assemble and dismantle the steel work frame, and there is a problem that the construction height is limited by the construction method using a crane truck. The demolition method that inserts a seri arrow and drops the heat-resistant bricks inside the chimney also has a problem that the amount of bricks to be removed cannot be managed and the planned demolition work becomes difficult.

  An object of the present invention is to provide a chimney demolition method and a chimney demolition apparatus that do not pollute the surrounding environment during the chimney demolition work and significantly improve the work environment and work efficiency of workers.

  The chimney disassembly method of the present invention includes a work stage on which a dismantling robot that holds a steel pipe rod standing on the outer periphery of the chimney and moves up and down to drive the hoisting jack to destroy the chimney from the outside is placed. Using the ascending step to raise the top of the working stage, a part of the frame constituting the work stage to be expanded to form a ceiling part, and the dismantling robot to be attached to the ceiling part, and the lifting jack A demolition step of lowering the work stage by a predetermined amount and destroying the chimney portion located higher than the work stage from the outside by the demolition robot.

  The chimney disassembling method of the present invention comprises: a decontamination robot provided with a position-holding expansion / contraction mechanism that presses an inner wall surface of the chimney to hold the position; and a washing nozzle that flushes the chimney from the inside; It is characterized by having a cleaning step of suspending in a vertically movable manner and cleaning the inner wall surface of the chimney by the cleaning robot prior to the dismantling step.

  The chimney disassembling method of the present invention is configured by an outer cylinder standing upright extending in a vertical direction and an inner cylinder standing upright with a gap inside the outer cylinder, and the cleaning robot further includes An inner cylinder crushing expansion / contraction mechanism for gripping the edge of the inner cylinder and a lower abutting expansion / contraction mechanism abutting a predetermined amount downward from the edge of the inner cylinder, and maintaining the position after the cleaning step The inner wall of the outer cylinder is pressed by the expansion / contraction mechanism to hold the position of the cleaning robot, and the expansion / contraction mechanism for crushing the inner cylinder is contracted to destroy the inner cylinder from the inside.

  A chimney demolition apparatus according to the present invention includes a demolition robot that destroys the chimney from the outside, a work stage on which the demolition robot is placed, and a work stage provided with a ceiling portion on which the demolition robot is mounted at the top of the chimney. And an elevating jack that moves up and down by holding a steel pipe rod standing on the outer periphery of the chimney.

  The chimney disassembling apparatus of the present invention is a decontamination robot provided with a position holding expansion and contraction mechanism for holding the position by pressing the inner wall surface of the chimney on the ceiling and a washing nozzle for washing the chimney from the inside. It is characterized by being suspended in a chimney so as to be movable up and down.

  The chimney disassembly apparatus of the present invention is configured by an outer cylinder that is vertically provided with the chimney extending vertically and an inner cylinder that is provided with a gap inside the outer cylinder. An inner cylinder crushing expansion / contraction mechanism for gripping the edge of the inner cylinder, and a lower abutting expansion / contraction mechanism for abutting the inner cylinder inner wall surface by a predetermined amount below the edge of the inner cylinder; The inner cylinder is destroyed from the inside by pressing the inner wall surface of the outer cylinder by an extension mechanism to hold the position of the cleaning robot and contracting the extension mechanism for breaking the inner cylinder.

  According to the chimney demolition method and the chimney demolition apparatus of the present invention, the work is performed while covering the chimney top portion with the work stage having a sealed structure, and therefore, the risk of scattering of harmful substances such as dioxins is significantly reduced. By covering only the top of the chimney with a curing sheet, the amount of necessary materials is reduced and the amount of human work such as transport installation is reduced, and there is a risk that the load on the chimney aging due to wind etc. will be small and collapse Decrease.

  The work stage can be moved up and down and can be assembled and dismantled on the ground. Therefore, the work stage is safer, lower in cost, and shorter in construction time than the method of assembling a temporary scaffold with a steel work frame. In addition, the construction height is not limited as in the method of assembling a temporary scaffold, and the higher the construction height, the more advantageous in terms of safety and economy.

  Since it is not necessary to lift and lower the steel pipe rod as a support and to take a support point for lifting from the chimney, it can also be applied to an old chimney.

  Since the chimney demolition device is controlled by remote control to perform most of the demolition work, the risk of workers being exposed to harmful substances such as dioxins is significantly reduced.

  By cleaning and destructing harmful substances that have accumulated inside the chimney, the highly polluted inner cylinder can be collected separately from the outer cylinder, reducing the amount of waste treated as hazardous industrial waste. can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a state in which a chimney demolition apparatus according to an embodiment of the present invention is attached to a chimney 10. The chimney 10 has a cylindrical outer shape, and includes an outer cylinder 11 that extends in the vertical direction and an inner cylinder 13 that stands up with a predetermined gap 12 on the radially inner side of the outer cylinder 11. Is done. In the illustrated case, the outer cylinder 11 is an RC wall manufactured using reinforced concrete (RC), and the inner cylinder 13 is a heat-resistant wall manufactured by assembling heat-resistant bricks. A radially inner side of the inner cylinder 13 is a flue 14 that is an exhaust path for combustion gas, and an exhaust port 15 is defined vertically upward. A flue port 16 for combustion gas is provided at the lower part of the chimney 10. Therefore, the combustion gas generated in the incinerator and taken in from the flue port 16 ascends the flue 14 and is exhausted from the discharge port 15 to the atmosphere. At this time, since the gap 12 is provided between the outer cylinder 11 and the inner cylinder 13, the heat of the combustion gas is not directly conducted to the outer cylinder 11.

  On the other hand, fly ash containing a high concentration of toxic substances tends to adhere to and accumulate on the flue 14 that is in direct contact with the combustion gas. In such a case, these toxic substances are cleaned prior to dismantling the chimney 10. Thus, the inside of the chimney 10 needs to be cleaned. As will be described later, the chimney disassembling method and the chimney disassembling apparatus of the present invention clean the inside of the flue 14 according to the degree of contamination inside the chimney 10 and keep the chimney 10 in a standing state without lying down. Can be systematically cleaned and dismantled from the top.

  On the outer periphery of the chimney 10, steel pipe rods 17 having a predetermined length are erected at equal intervals with a rod base (not shown) as a base so as to surround the chimney 10. These steel pipe rods 17 are supported in a horizontal direction by a rod stay 19 and a turnbuckle 20 that are locked to the outer wall surface 18 of the chimney 10 in order to prevent buckling. Further, one end of the steel pipe rod 17 is a male screw and the other end is a female screw, and can be arbitrarily added in the axial direction (see FIG. 1C). In the case shown in the figure, three steel pipe rods 17 are arranged at intervals of 120 ° so as to surround the chimney 10, but the number of the steel pipe rods 17 erected is safe from the chimney demolition device of the present invention. Needless to say, it can be arbitrarily increased or decreased within a range that can be moved up and down.

  A work stage 23 having an octagonal outer frame 21 and an octagonal inner frame 22 through which the chimney 10 passes is disposed so as to further surround these steel pipe rods 17 (see FIG. 1A). The work stage 23 is a scaffold for performing the work of adding the steel pipe rod 17 and the work of mounting the dismantling robot 24. The work stage 23 is formed of a steel plate and a steel material, and the steel pipe rod 17 is held below the floor surface. The raising / lowering jack 25 which moves up and down is each mounted | worn corresponding to the standing location of the steel pipe rod 17. As shown in FIG. Therefore, by driving these lifting jacks 25, the work stage 23 can be moved up and down freely in the extending direction of the steel pipe rod 17, that is, in the vertical direction. The dismantling robot 24 for destroying the chimney 10 from the outside is placed and transported on a guide plate (not shown) locked at a position 28 indicated by a one-dot chain line on the work stage 23 (FIG. 1 ( A)).

  FIG. 2 is an explanatory view showing the operating state of the lifting jack 25 when it is raised, and FIG. 3 is an explanatory view showing the operating state of the lifting jack 25 when it is lowered. In the illustrated case, the lifting jack 25 is a hydraulic jack, and a hydraulic cylinder 29 that connects an upper chuck base 26 fixed to the work stage 23 and a lower chuck base 27 having the same shape as a power source is used as a power source. The steel pipe rod 17 is raised and lowered.

  The insides of the upper chuck base 26 and the lower chuck base 27 are both penetrated in a truncated cone shape to form through holes 30a and 31a through which the steel pipe rod 17 passes and tapered surfaces 30b and 31b set at a predetermined inclination angle. Has been. And between the steel pipe rod 17 penetrated through the through holes 30a and 31a and the tapered surface 30b, an outer surface 32a having an inclination angle equivalent to that of the tapered surface 30b and a curvature equivalent to that of the outer peripheral surface of the steel pipe rod 17 are provided. A plurality of upper chucks 32 each having a circular arc surface 32 b on which a serrated engagement groove is formed are accommodated so as to surround the outer periphery of the steel pipe rod 17. Each of the upper chucks 32 is always urged vertically upward by a chuck spring 34a through a lower ring (not shown), but the spring is driven by driving a mini cylinder 34b connected through an opening ring (not shown). It can move vertically downward against the force.

  On the other hand, the same number of lower chucks 33 as the upper chuck 32 are accommodated between the steel pipe rod 17 and the tapered surface 31b, and are always urged vertically upward by the chuck spring 35a, and the mini cylinder 35b. Can be moved vertically downward.

  Next, a procedure for raising the work stage 23 with such a lifting jack 25 will be described.

  First, as shown in FIG. 2A, when the hydraulic cylinder 29 is in the contracted state, the piston rod 29a is driven forward to the forward limit position. At this time, each of the lower chucks 33 slidably contacting the lower chuck base 27 at a predetermined inclination angle slides toward the steel pipe rod 17 and engages with the steel pipe rod 17. Since each of the lower chucks 33 disposed on the outer periphery of the steel pipe rod 17 bites into the steel pipe rod 17, the steel pipe rod 17 is strongly held by the lower chuck 33, and the lower chuck base 27 is prevented from being lowered. The

  On the other hand, due to the vertically upward cylinder thrust transmitted to the upper chuck base 26, the upper chuck 32 does not operate in a direction to engage with the steel pipe rod 17. Thus, the lifting jack 25 pushes up the work stage 23 by one stroke (see FIG. 2B).

  On the contrary, when the piston rod 29a of the hydraulic cylinder 29 in the extended state is driven backward, a horizontal force in the direction of holding the steel pipe rod 17 acts only on the upper chuck 32, and the work stage 23 is lowered. The lower chuck base 27 can be lifted up. That is, the piston rod 29a in the forward limit position can be returned to the contracted state shown in FIG. 2A without sliding down the work stage 23. By repeating the above expansion and contraction operation, the work stage 23 can be raised by one stroke (for example, 10 cm) like a scale insect.

  Next, a procedure for lowering the work stage 23 will be described.

  First, the piston rod 29a located at the lower open preparation position (see FIG. 3A) set to the forward side by a predetermined amount (for example, 20 mm) from the reverse limit position is driven backward to drive the hydraulic cylinder 29 to the reverse limit position. (See FIG. 3B). Then, only the restoring force by the chuck spring 35a is applied to the lower chuck 33 in the state where the horizontal force in the direction of holding the steel tube rod 17 is not applied, and the meshed state between the steel tube rod 17 and the lower chuck 33 is released. . In order to maintain this released state, the mini cylinder 35b is driven forward, and the lower chuck 33 is pushed down vertically against the spring force.

  Next, the hydraulic cylinder 29 is driven forward to extend the piston rod 29a by a predetermined amount from the forward limit position to the upper opening preparation position set at the reverse position. Then, since the lower chuck 33 in the released state is completely free with respect to the steel pipe rod 17, the lower chuck base 27 is pushed down by one stroke as shown in FIG. Thereafter, when the mini cylinder 35b is driven backward, the lower chuck 33 is urged upward by the restoring force of the chuck spring 35a.

  Next, when the piston rod 29a in the upper opening preparation position is driven forward to the forward limit position, the lower chuck 33 engages with the steel pipe rod 17, and the engagement state between the steel pipe rod 17 and the upper chuck 32 is released. (See FIG. 3D). Next, in order to maintain this state, the mini cylinder 34b is driven forward. As a result, the upper chuck 32 does not mesh with the steel pipe rod 17 and only the lower chuck 33 meshes with the steel pipe rod 17, and the piston rod 29 a is moved back to the lower opening preparation position to work for one stroke. The stage 23 can be pushed down (see FIG. 3E). Thereafter, the mini cylinder 34b is driven backward, and the upper chuck 32 is biased upward by the chuck spring 34a, thereby returning to the state shown in FIG. That is, the work stage 23 can be lowered by one stroke by repeating the above expansion and contraction operation.

  A level sensor (not shown) and a local microcomputer are attached to the lifting jack 25, and the lifting / lowering of the work stage 23 is performed semi-automatically according to instructions from the worker. Further, when moving up and down, the work stage 23 is attached with a swing roller 36 that rolls on the outer wall surface so that the work stage 23 does not tilt due to the load difference of the lift jack 25. Further, a maintenance scaffold 37 for repairing the lifting jack 25 is provided below the floor surface of the work stage 23.

  The guide plate 38 on which the dismantling robot 24 is placed is a rectangular steel plate that can slide toward the center of the inner frame 22, and is locked at a predetermined retraction position 28 when the work stage 23 is raised and lowered. The dismantling robot 24 is composed of a main body 39a and a dismantling arm 39b. Depending on the material and properties of the chimney 10, the dismantling arm 39b is a crusher that applies vibration to an object such as a hydraulic breaker, a rebar cutting cutter, etc. Is selected.

  As shown in FIG. 4A, when the work stage 23 reaches the top of the chimney 10, a part of the frame constituting the work stage 23 is developed to form the ceiling 40 (see FIG. 4B). ). The assembling work of the ceiling part 40 is performed by a worker who has entered the work stage 23 with a lift elevator (not shown). The ceiling portion 40 is provided with a set of rails 41 made of a horizontal steel material and a support frame 42 that can move along the rails 41. At this time, in order to facilitate the demolition work of the chimney 10 by the dismantling robot 24, the main body 39a is pivotably attached to the support frame 42, and the rails 41 are arranged in parallel with the central portion of the chimney 10 interposed therebetween. Then, the dismantling robot 24 is translated directly above the flue 14 (see FIG. 5A).

  The work procedure for attaching the dismantling robot 24 to the support frame 42 is shown in FIGS. First, the guide plate 38 on which the dismantling robot 24 is placed is slid toward the center of the inner frame 22 and stopped just above the center of the flue 14 (see FIG. 5B). Next, the work stage 23 is lowered to an attachable position where the support frame 42 contacts the main body 39a of the dismantling robot 24 (see FIG. 5C), and the main body 39a is attached to the support frame 42 (FIG. 5D). reference). Then, by lifting the work stage 23 to a position where the main body 39a and the chimney 10 do not interfere (see FIG. 5E), the disassembly robot 24 mounting work is completed. After completing the dismantling operation of the dismantling robot 24, the guide plate 38 is removed by an operator.

  After the dismantling robot 24 is mounted, the entire work stage 23 is hermetically sealed in order to prevent the dismantling pieces from falling and the scattering of harmful substances. The sealing operation of the work stage 23 is performed by curing the outer periphery with a normal vinyl sheet and further curing the interior with a poly sheet. Since the entire chimney 10 is not covered with the curing sheet in this way, the load applied to the chimney through the curing sheet by wind or the like is small, and the risk of the collapse of the chimney 10 that has become structurally weak due to dismantling work is reduced. Can do.

  As described above, the inside of the chimney 10, particularly the inner wall surface of the inner cylinder 13, may be highly polluted with harmful substances. In that case, it is necessary to clean the inside of the chimney 10 before the chimney 10 is disassembled. FIG. 6 schematically illustrates that the inner wall surface of the inner cylinder 13 is washed with water by the removal robot 43. The removal robot 43 is suspended inside the chimney 10 by means of suspension such as a wire 46 in which an electric hoist 44 is pivotably attached to the main body 39a of the dismantling robot 24 and a suspension fitting 45 is attached to the tip thereof. Next, the cleaning robot 43 is placed inside the chimney through the chimney 16 and is hung by the hanging bracket 45 and lifted. When lifting, a high pressure water hose coupler 48 is connected to the washing nozzle 47 so that high pressure water is supplied from a high pressure water pump 50 installed on the ground via the hose 49. The hose 49 is flexible enough to withstand the pressure of the high-pressure water, and follows the movement of the cleaning robot 43 that is moved up and down by the electric hoist 44. The rigidity, inner diameter, and the like of the hose 49 can be appropriately changed depending on required flexibility and supply amount of high-pressure water.

  FIG. 7 is an explanatory diagram of the configuration and arrangement of the cleaning robot 43. A hanging metal fitting 45 attached to the tip of the wire 46 is connected to a disk-shaped support portion 51. The support portion 51 includes an expansion / contraction mechanism 52 that reciprocates in the radial direction of the chimney 10, and a roller portion 53 that is attached to the tip of the expansion / contraction mechanism 52 and presses the inner wall surface of the chimney 10. The position maintaining expansion / contraction mechanism 54 is mounted. The telescopic mechanism 52 is moved in and out by a pneumatic cylinder. Further, in order to obtain an appropriate pressing force, a load sensor (not shown) using a load cell is disposed at a joint portion between the pneumatic cylinder and the roller portion 53. In the case shown in the drawing, the position-holding expansion / contraction mechanisms 54 are arranged in three directions at intervals of 120 ° (see FIG. 7A), and the respective expansion / contraction mechanisms 52 are extended to form the outer cylinder 11 or the inner cylinder. By pressing the inner wall surface 13, the cleaning robot 43 can be held at an arbitrary position in the chimney 10. In order to further stabilize the posture, it is possible to provide three-way support in two upper and lower stages.

  A rotation shaft 55 that rotates in the circumferential direction of the chimney 10 is rotatably supported at the center of the support portion 51. The rotary shaft 55 is connected to a motor 56 mounted on the support portion 51 via a gear rotation transmission mechanism, and can be rotated by an arbitrary angle. The power source of the motor 56 may be pneumatic, hydraulic or electric.

  The rotating shaft 55 includes an expansion / contraction mechanism 57 that expands and contracts in a reciprocating manner in the radial direction of the chimney 10, and a concave handle portion 58 that holds the edge of the inner cylinder 13 at the tip thereof. An expansion / contraction mechanism 59 is fixed. Also, an expansion / contraction mechanism 60 that reciprocates in the radial direction of the chimney 10 so as to abut a predetermined amount below the edge of the inner cylinder 13 and an inner wall surface of the inner cylinder 13 at the tip thereof. A lower contact expansion / contraction mechanism 62 having a pad portion 61 in contact therewith is fixed to the rotary shaft 55. That is, as shown in FIG. 7A, when the inner cylinder crushing expansion / contraction mechanism 59 is disposed in the reverse direction at intervals of 180 °, the lower abutting expansion / contraction mechanism 62 is arranged at intervals of 180 ° in the same direction. Will be placed. The inner cylinder crushing expansion / contraction mechanisms 59 can be arranged at intervals of 120 °, for example, and in this case, the three lower contact expansion / contraction mechanisms 62 are arranged at intervals of 120 ° in the same direction. It will be.

  The lower contact expansion / contraction mechanism 62 incorporates a load sensor (not shown) for measuring the pressing force against the inner wall surface of the inner cylinder 13 in the same manner as the position holding expansion / contraction mechanism 54, so that an appropriate pressing force is applied. It is secured. Each of the expansion / contraction mechanisms 57 and 60 is adapted to be moved in and out by a pneumatic cylinder in the same manner as the expansion / contraction mechanism 52 described above.

  A cleaning nozzle 47 for washing the inner wall surface of the chimney 10 is attached to the lower end portion of the rotating shaft 55. As described above, high-pressure water is supplied to the cleaning nozzle 47 through the hose 49, and the inner wall surface of the chimney 10 can be cleaned in the circumferential direction by the high-pressure water sprayed from the cleaning nozzle 47. . Therefore, the inner wall surface of the inner cylinder 13 can be washed with water by driving the electric hoist 44 and moving the cleaning robot 43 up and down between the edge portion and the base end portion of the inner cylinder 13. By washing away harmful substances such as dioxins, it is possible to dispose of these dismantled products as general industrial waste. Naturally, the cleaning object of the cleaning nozzle 47 is not limited to the inner wall surface of the inner cylinder 13, and after the inner cylinder 13 is disassembled, it is accompanied by harmful substances adhering to the inner wall surface of the outer cylinder 11 entering from the gap 12 and the disassembly of the inner cylinder 13. It is also possible to disassemble the outer cylinder 11 after washing away the attached debris and the like.

  Next, an operation procedure for disassembling the inner cylinder 13 using the cleaning robot 43 will be described.

  When the inner wall surface of the inner cylinder 13 is cleaned by the cleaning robot 43, the extension mechanism 52 for holding the position of the cleaning robot 43 is extended in three directions and the roller unit 53 is brought into contact with the inner wall surface of the inner cylinder 13. At this time, if the center of the cleaning robot 43 is kept concentric with the center of the flue 14, the cleaning robot 43 can be smoothly rotated to perform uniform cleaning. Next, while the high pressure water is sprayed from the cleaning nozzle 47, the electric hoist 44 is driven to move the removal robot 43 up and down between the edge of the inner cylinder 13 and the base end, thereby washing the inner wall surface of the inner cylinder 13 with water. Wash. If the inside of the chimney 10 is not contaminated, the cleaning operation can be omitted. In this case, the cleaning nozzle 47 can be removed from the cleaning robot 43.

  When the cleaning operation for the inner wall surface of the inner cylinder 13 is completed, the inner cylinder 13 is disassembled. For dismantling the inner cylinder 13, the cleaning robot 43 is arranged as shown in FIG. In other words, the electric hoist 44 is driven to raise the cleaning robot 43 to the top of the outer cylinder 11, and the position holding expansion / contraction mechanism 52 is extended to bring the roller portion 53 into contact with the inner wall surface of the outer cylinder 11. Next, the inner cylinder crushing expansion / contraction mechanism 57 is extended, the washing robot 43 is lowered, and the concave handle portion 58 is hooked on the edge of the inner cylinder 13. Thereafter, the expansion / contraction mechanism 60 for lower contact is extended to press the pad portion 61 against the inner cylinder 13 surface. At this time, the pressing force to the outer cylinder 11 and the inner cylinder 13 is controlled based on the measurement values of the load sensors respectively attached to the position holding extension mechanism 54 and the lower contact extension mechanism 62. Remove pipes and wires related to the heat-resistant bricks before dismantling.

  Under such an arrangement, when the expansion / contraction mechanism 57 for crushing the inner cylinder is retracted, the heat-resistant bricks laminated between the handle portion 58 and the pad portion 61 are destroyed, and the fragments are moved into the inner cylinder 13. Will fall. If the breakage is successful, the brick crushing cylinder is retracted to a position where it does not contact the inner cylinder 13 (see FIG. 7A), and then the motor 56 is driven to rotate the handle portion 58 and the pad portion 61 to the uncrushed portion. Perform the following destruction work. At this time, the position of the cleaning robot 43 in the flue 14 is held by the position holding expansion / contraction mechanism 54, and the apparatus itself is not rotated by the reaction of the rotation of the rotating shaft 55. As shown in FIG. 8, the destroyed heat-resistant brick falls in the flue 14 and accumulates inside the base. As the heat-resistant bricks are dismantled, the removal robot 43 is lowered, and the heat-resistant bricks are sequentially broken down to the base. Since the inner cylinder 13 disassembly work is performed in an environment isolated from the outside by the outer cylinder 11 and the work stage 23, dust and debris generated by the disassembly of the inner cylinder 13 are not scattered. In addition, you may make it distribute a dust inhibitor with a nozzle before destruction.

  During the disassembly work of the inner cylinder 13 and the disassembly work of the outer cylinder 11 described later, a negative pressure device (not shown) connected to the inside of the flue 14 is driven via a ventilation pipe (not shown) to The negative pressure is controlled. As a result, it is possible to prevent dust and toxic substances that fill the chimney 10 from being leaked to the outside with dismantling, and to efficiently collect and process dust and debris. When the disassembly of the inner cylinder 13 is completed, the backhoe 63 collects debris such as dust and debris. A vehicle-mounted camera is attached to the backhoe 63, and an operator can remotely operate the backhoe 63 with an operation panel while looking at a monitor in an operation room provided in a safety area.

  The disassembly of the outer cylinder 11 is performed by lowering the work stage 23 by a predetermined amount using the lifting jack 25 and destroying the part of the outer cylinder 11 at a higher position than the work stage 23 so that the disassembly robot 24 projects from the outside. Perform (see FIG. 9). After the concrete portion of the outer cylinder 11 that is the RC wall is crushed by the hydraulic breaker, the rebar portion remains, so the dismantling arm 39b is replaced with a rebar cutting cutter and cut off. However, depending on the deterioration state of the outer cylinder 11, the concrete portion can also be sandwiched and crushed together by a rebar cutting cutter. The dismantling robot 24 is operated by remote operation while monitoring with a monitoring camera attached to the work stage 23. Such disassembly work of the outer cylinder 11 is performed in an environment isolated from the outside by the uncrushed portion of the outer cylinder 11 and the work stage 23 that is hermetically sealed, so that debris and dust generated by the disassembly of the outer cylinder 11 are removed. It will not scatter. Further, if the dismantling operation is performed by remotely operating the dismantling robot 24 as described above, it is safe without any risk of exposure to workers. Furthermore, since the dismantled material is dropped into the outer cylinder 11, scattering to the surroundings can be prevented, and the work of collecting and recovering the dismantled material becomes easy. In FIG. 9, the portion of the outer cylinder 11 that is destroyed by a single operation and the change in operation of the dismantling robot 24 that accompanies the destruction work of the outer cylinder 11 are indicated by broken lines.

  By sequentially disassembling the outer cylinder 11 while lowering the work stage 23, the work stage 23 is landed at the end of disassembly of the outer cylinder 11. As a result, the removal work of the dismantling robot 24 and the dismantling work of the work stage 23 can be performed on the ground, so that safety of workers and improvement of work efficiency can be achieved.

  FIG. 10 is an explanatory view showing another embodiment of the present invention, and members that are the same as those shown in FIGS. 1 to 9 are given the same reference numerals. The chimney 10a includes an outer cylinder 11a that is an RC wall having an octagonal cross section, and a steel inner cylinder 13a that is erected with a predetermined gap 12a provided radially inside the outer cylinder 11a (see FIG. 10 (A)). In this way, when the inner cylinder 13a is a steel pipe, only the cleaning robot 43 performs cleaning, and the dismantling is carried out by the worker on the work stage 23 and manually cut by gas cutting or a disk cutter. Therefore, as shown in the drawing, the inner cylinder crushing expansion / contraction mechanism 59 and the lower contact expansion / contraction mechanism 62 can be omitted (see FIG. 10B). After cleaning the inner cylinder 13a, the lifting jack 25 is driven to lower the work stage 23 by a predetermined amount to disassemble the outer cylinder 11a by the dismantling robot 24 (see FIG. 10C) and dismantling the inner cylinder 13a by human power. And in order. In FIG. 10C, the portion of the outer cylinder 11a that is destroyed by a single operation and the change in operation of the dismantling robot 24 that accompanies the destruction work of the outer cylinder 11a are indicated by broken lines.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, instead of the pneumatic cylinder described above, a ball jack that is driven by a hydraulic cylinder or an electromagnetic motor may be used for the expansion / contraction mechanisms 52, 57, and 60 constituting the cleaning robot 43. Further, the dismantling arm 39b is not limited to the above-mentioned type, and dismantling work can be performed using various dismantling arms according to the shape and material of the chimney.

(A)-(C) are schematic sectional drawings which show the state which attached the chimney demolition apparatus which is one embodiment of this invention to the chimney. (A), (B) is explanatory drawing which shows the operation state of the raising / lowering jack at the time of a raise. (A)-(E) are explanatory drawings which show the operating state of the raising / lowering jack at the time of descent | fall. (A), (B) is explanatory drawing which shows the formation procedure of a ceiling part. (A)-(E) are explanatory drawings which show the mounting procedure of a dismantling robot. It is explanatory drawing of the washing | cleaning process which wash | cleans an inner cylinder inner wall surface with a removal robot. (A), (B) is explanatory drawing of a structure and arrangement | positioning of a washing robot. It is explanatory drawing of the disassembly process which disassembles an inner cylinder with a removal robot. It is explanatory drawing of the dismantling process which disassembles an outer cylinder with a dismantling robot. (A)-(C) are explanatory drawings which show other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chimney 11 Outer cylinder 13 Inner cylinder 16 Flue port 17 Steel pipe rod 23 Work stage 24 Demolition robot 25 Lifting jack 39b Demolition arm 40 Ceiling part 43 Cleaning robot 44 Electric hoist 46 Wire 47 Cleaning nozzle 49 Hose 53 Roller part 54 For position holding Telescopic mechanism 58 Handle part 59 Inner cylinder crushing elastic mechanism 61 Pad part 62 Lower abutting elastic mechanism 63 Backhoe

Claims (6)

An ascending step of raising a work stage on which a demolition robot for breaking a chimney from the outside is mounted to the top of the chimney by driving a lifting jack that moves up and down by grasping a steel pipe rod standing on the outer periphery of the chimney When,
A mounting step of developing a part of the frame constituting the work stage to form a ceiling part and mounting the dismantling robot on the ceiling part;
A chimney dismantling method comprising: a step of lowering the work stage by a predetermined amount using the lifting jack and destroying the chimney portion located at a higher position than the work stage from the outside by the dismantling robot.   The chimney disassembly method according to claim 1, wherein a decontamination robot including a position holding telescopic mechanism that presses an inner wall surface of the chimney to hold the position and a washing nozzle that flushes the chimney from the inside is provided from the ceiling. A chimney disassembling method comprising a washing step of hanging in the chimney so as to move up and down and washing the inner wall surface of the chimney by the decontamination robot prior to the disassembling step.   3. The chimney disassembling method according to claim 2, wherein the chimney is constituted by an outer cylinder standing vertically extending, and an inner cylinder standing by providing a gap inside the outer cylinder, and the decontamination robot. Further includes an inner cylinder crushing expansion / contraction mechanism that grips the edge of the inner cylinder and a lower contact expansion / contraction mechanism that contacts a predetermined amount downward from the edge of the inner cylinder, and after the cleaning step, An inner wall surface of the outer cylinder is pressed by a position holding expansion / contraction mechanism to hold the position of the cleaning robot, and the inner cylinder crushing expansion / contraction mechanism is contracted to destroy the inner cylinder from the inside. Chimney dismantling method. A demolition robot that destroys the chimney from the outside,
A work stage provided with a work platform on which the dismantling robot is placed and a ceiling on which the dismantling robot is mounted at the top of the chimney;
A chimney disassembling apparatus comprising an elevating jack that moves up and down by gripping a steel pipe rod standing on the outer periphery of the chimney.   5. A chimney disassembling apparatus according to claim 4, wherein a de-rinsing robot comprising a position holding telescopic mechanism for holding the position by pressing the inner wall surface of the chimney and a washing nozzle for washing the chimney from the inside on the ceiling. The chimney dismantling device is suspended in the chimney so as to be movable up and down. 6. The chimney disassembly apparatus according to claim 5, wherein the chimney is composed of an outer cylinder that extends in a vertical direction and an inner cylinder that is erected with a gap provided inside the outer cylinder, and the removal robot Includes an inner cylinder crushing expansion / contraction mechanism that grips an edge of the inner cylinder and a lower contact expansion / contraction mechanism that contacts the inner cylinder inner wall surface by a predetermined amount below the edge of the inner cylinder, and A chimney that presses an inner wall surface of the outer cylinder by a holding expansion / contraction mechanism to hold the position of the cleaning robot and contracts the inner cylinder crushing expansion / contraction mechanism to destroy the inner cylinder from the inside. Demolition device.

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