JP2005068758A - Chimney washing demolition device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chimney washing demolition device washing the inside of a chimney and demolishing an internal cylinder in the demolition of the chimney having an internal-external double structure having an inner wall as a heat-resisting wall on the inside of an external cylinder. <P>SOLUTION: The chimney washing demolition device 43 is hung down in the internal cylinder 13 disposed in upright by forming an opening 12 inside the external cylinder 11 in a freely vertically movable manner. The device 43 has an expansion mechanism 54 holding a position by pushing the inner wall surface of the chimney, the expansion mechanism 59 for crushing the internal cylinder gripping the edge section of the internal cylinder 13, the expansion mechanism 62 for an abutting against a lower section abutted against the inner wall surface of the internal cylinder 13 on the lower side by a fixed quantity from the edge section of the internal cylinder 13 and a washing nozzle 47 washing the chimney by water from the inside. The internal cylinder 13 is broken by the fixed quantity by shrinking the expansion mechanism 59 under the state in which the expansion mechanism 62 is extended. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chimney cleaning / disassembling apparatus for disassembling a chimney having an inner / outer dual structure having an inner wall as a heat-resistant wall inside an outer cylinder, and more particularly to a chimney cleaning / disassembling apparatus for cleaning or dismantling a chimney from the inside.

  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.

  It is an object of the present invention to disassemble a chimney having an inner / outer dual structure having an inner wall as a heat-resistant wall inside the outer cylinder, and in particular, to clean the chimney inside and to remove the inner cylinder from the inner side The object is to provide a dismantling device.

  The chimney cleaning and disassembling apparatus of the present invention cleans or disassembles a chimney composed of an outer cylinder extending vertically and an inner cylinder erecting with a gap provided inside the outer cylinder from the inside. A chimney cleaning and disassembling apparatus, wherein a support part is suspended inside the inner cylinder so as to be movable up and down, and a telescopic mechanism that reciprocates in a radial direction of the chimney from the support part. A roller portion that presses the inner wall surface of the outer cylinder or the inner cylinder, and a position-holding expansion / contraction mechanism that holds the support portion at an arbitrary position in the chimney, and downward from the support portion toward the chimney A rotating shaft that rotates in the circumferential direction of the chimney by a motor mounted on the support portion, and is fixed to the rotating shaft, and reciprocates from the rotating shaft toward the radial direction of the chimney. Grip the edge of the inner cylinder at the tip of the telescopic mechanism An inner cylinder crushing expansion / contraction mechanism having a handle portion, and a pad portion that comes into contact with the inner wall surface of the inner cylinder at the distal end of the expansion / contraction mechanism that reciprocally moves in the radial direction of the chimney from the rotation shaft, And a lower contact expansion / contraction mechanism fixed to the rotary shaft so as to contact a predetermined amount below the edge of the inner cylinder.

  The chimney cleaning and dismantling apparatus of the present invention is characterized in that the rotating shaft is provided with a cleaning nozzle for washing the inner wall surface of the chimney.

  In the chimney cleaning and dismantling apparatus according to the present invention, the position holding expansion / contraction mechanism includes a load sensor that measures a pressing force against the inner wall surface of the outer cylinder or the inner cylinder, and the lower contact expansion / contraction mechanism includes the inner cylinder. A load sensor for measuring a pressing force against the inner wall surface is provided.

  According to the chimney cleaning and dismantling apparatus of the present invention, the chimney cleaning and dismantling apparatus can be controlled by remote operation to perform the cleaning and dismantling work, so that the risk of exposure of workers to dioxins is significantly reduced.

  In addition, the amount of bricks destroyed by a single operation by supporting the part of the inner wall surface of the inner cylinder with the lower contact expansion / contraction mechanism and pulling the inner cylinder inward with the internal cylinder crushing expansion / contraction mechanism and destroying it. Can be managed, and the disassembly and collection work of the inner cylinder can be performed in a planned manner.

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

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The chimney 10 to be dismantled has a cylindrical outer shape, and an outer cylinder 11 that extends vertically and stands upright, and an inner cylinder 13 that stands up with a predetermined gap 12 inside the outer cylinder 11 in the radial direction. It consists of. In the present embodiment, 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 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).

  Three steel pipe rods 17 are arranged on the outer periphery of the chimney 10 at intervals of 120 °, and an octagonal outer frame 21 and an octagonal inner frame 22 through which the chimney 10 passes so as to further surround the steel pipe rods 17. Is provided (see FIG. 1A). Needless to say, the number of steel pipe rods 17 erected on the outer periphery of the chimney 10 can be arbitrarily increased or decreased within a range in which the work stage 23 can be moved up and down safely.

  The work stage 23 serves as 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. The moving raising / lowering jacks 25 are respectively mounted corresponding to the standing positions of the steel pipe rods 17. 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 toxic substances. In that case, it is necessary to clean the inside of the chimney 10 before the chimney 10 is disassembled. As will be described later, the chimney cleaning and disassembling apparatus 43 of the present invention cleans the inside of the flue 14 in accordance with the degree of contamination inside the chimney 10, and allows the inner cylinder 13 to be placed upright without the chimney 10 lying on its side. Can be cleaned and dismantled systematically.

  FIG. 6 schematically illustrates that the inner wall surface of the inner cylinder 13 is washed with the chimney cleaning and dismantling device 43. The chimney cleaning and disassembling apparatus 43 is suspended in the chimney 10 by suspending a wire 46 or the like 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. Then, the chimney cleaning and disassembling apparatus 43 is put into the chimney through the flue port 16 and is hooked by the hanging metal fitting 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 high-pressure water, and follows the movement of the chimney cleaning and dismantling device 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 chimney cleaning and dismantling device 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 chimney cleaning and disassembling device 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 chimney cleaning / disassembling apparatus 43 up and down between the edge of the inner cylinder 13 and the base end. 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 chimney cleaning and disassembling apparatus 43 will be described.

  When the inner wall surface of the inner cylinder 13 is cleaned by the chimney cleaning and dismantling device 43, the extension mechanism 52 for holding the position of the chimney cleaning and dismantling device 43 is extended in three directions so that the roller portion 53 comes into contact with the inner wall surface of the inner cylinder 13 Let At this time, if the center of the chimney cleaning / disassembling apparatus 43 is held so as to be concentric with the center of the flue 14, the rotational movement of the chimney cleaning / disassembling apparatus 43 is smoothly performed and uniform cleaning can be performed. . Next, while injecting high-pressure water from the cleaning nozzle 47, the electric hoist 44 is driven to move the chimney cleaning / disassembling device 43 up and down between the edge portion of the inner tube 13 and the base end portion, thereby changing the inner wall surface of the inner tube 13. Wash with water. If the inside of the chimney 10 is not contaminated, the cleaning operation can be omitted. In that case, the cleaning nozzle 47 can be removed from the chimney cleaning and dismantling device 43.

  When the cleaning operation for the inner wall surface of the inner cylinder 13 is completed, the inner cylinder 13 is disassembled. For disassembling the inner cylinder 13, the chimney cleaning and disassembling apparatus 43 is arranged as shown in FIG. That is, the electric hoist 44 is driven to raise the chimney cleaning and disassembling device 43 to the top of the outer cylinder 11, and the position holding expansion / contraction mechanism 52 is extended to bring the roller section 53 into contact with the inner wall surface of the outer cylinder 11. Next, the expansion / contraction mechanism 57 for crushing the inner cylinder is extended, the chimney cleaning / disassembling apparatus 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 chimney cleaning and disassembling apparatus 43 is held in the flue 14 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 brick is disassembled, the chimney cleaning and disassembling apparatus 43 is lowered, and the heat-resistant brick is 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 cleaning is performed by the chimney cleaning and disassembling apparatus 43, and the dismantling is carried out manually by the operator by getting on the work stage 23 by gas fusing 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, the expansion and contraction mechanisms 52, 57, and 60 constituting the chimney cleaning and disassembling apparatus 43 may use ball jacks that are driven by a hydraulic cylinder or an electromagnetic motor, instead of the pneumatic cylinder described above. 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 work stage 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 the chimney washing | cleaning dismantling apparatus which is one embodiment of this invention. (A), (B) is explanatory drawing of a structure and arrangement | positioning of the chimney washing | cleaning dismantling apparatus which is one embodiment of this invention. It is explanatory drawing of the disassembly process which disassembles an inner cylinder with the chimney cleaning disassembly apparatus which is one embodiment of this invention. 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 12 Gap 13 Inner cylinder 14 Flue 17 Steel pipe rod 23 Work stage 24 Demolition robot 25 Lifting jack 39b Demolition arm 40 Ceiling part 41 Rail 42 Support frame 43 Chimney cleaning dismantling device 44 Electric hoist 45 Suspension fitting 46 Wire 47 Cleaning nozzle 48 Coupler 49 Hose 50 Pump 51 Bearing part 52 Telescopic mechanism 53 Roller part 54 Position holding telescopic mechanism 55 Rotating shaft 56 Motor 57 Telescopic mechanism 58 Handle part 59 Inner cylinder crushing telescopic mechanism 60 Telescopic mechanism 61 Pad part 62 Lower contact Extending and contracting mechanism

Claims (3)

A chimney cleaning and dismantling device that cleans and disassembles a chimney composed of an outer cylinder that extends in the vertical direction and an inner cylinder that is provided with a gap inside the outer cylinder from the inside,
A bearing portion suspended in the inner cylinder so as to be movable up and down;
A roller portion that presses the outer cylinder or the inner wall surface of the inner cylinder is provided at the tip of an expansion / contraction mechanism that reciprocates in a radial direction from the support section toward the radial direction of the chimney, and the support section is an arbitrary one in the chimney. A position-holding telescopic mechanism for holding at a position;
A rotating shaft provided from the support portion toward the lower side of the chimney, and rotated in the circumferential direction of the chimney by a motor mounted on the support portion;
An expansion / contraction mechanism for crushing an inner cylinder, which includes a handle portion that grips an edge of the inner cylinder at a distal end of an expansion / contraction mechanism that is fixed to the rotation shaft and reciprocates in a radial direction of the chimney from the rotation shaft. When,
A pad portion that comes into contact with the inner wall surface of the inner cylinder is provided at the tip of an expansion / contraction mechanism that reciprocates in a radial direction from the rotating shaft toward the radial direction of the chimney, and a predetermined amount below the edge of the inner cylinder. A chimney cleaning and disassembling apparatus comprising: a lower contact expansion / contraction mechanism fixed to the rotating shaft so as to contact.   2. The chimney cleaning and dismantling apparatus according to claim 1, wherein the rotating shaft is provided with a cleaning nozzle for washing the inner wall surface of the chimney. 3. The chimney cleaning and dismantling apparatus according to claim 1 or 2, wherein the position holding expansion / contraction mechanism includes a load sensor that measures a pressing force against an inner wall surface of the outer cylinder or the inner cylinder, and the lower contact expansion / contraction mechanism includes: A chimney cleaning and disassembling apparatus comprising a load sensor for measuring a pressing force against an inner wall surface of the inner cylinder.

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