JP2009001983A - Disassembling method and device for double structure chimney - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disassembling method and device for a double structure chimney, ensuring worker's safety, dispensing with the installation of a scaffold for dismantling an inner cylinder, and allowing a worker to perform disassembling work without receiving a wind load. <P>SOLUTION: In this disassembling method, many mast blocks 16 are mutually connected, a lower part of a suspension mast 44 capable of changing their length and an upper part of the inner cylinder 14 are fixed, and the suspension mast 44 is held by a suspension moving means 34 provided above the inner cylinder 14. A lower part of the inner cylinder 14 is cut, its broken member is removed, the suspension mast 44 and the inner cylinder 14 are lowered by the suspension moving means 34, and a lower end of the inner cylinder 14 is put on the ground. The mast blocks 16 are added to the suspension mast 44 to extend length of the suspension mast 44 and change a position for holding the suspension mast 44 by the suspension moving means 34. Consequently, the inner cylinder 14 can be cut from its lower part in the inside of an outer cylinder 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disassembling method and a disassembling apparatus for disassembling a double structure chimney composed of an inner cylinder and an outer cylinder.

  Conventionally, various methods for disassembling a chimney are known. In particular, the dismantling method is limited in a high chimney. A method of dismantling a high chimney includes assembling a scaffolding around the chimney and the entire height, where an operator cuts the chimney (the weight of one piece cut is, for example, 10 to 20 tons), and the chimney There is known a method of lifting a cut piece with a large crane arranged in the vicinity of and lifting it down to the ground outside the chimney. A scaffold that is built around the chimney's circumference and height is disclosed in Patent Document 1.

JP 2004-183450 A

  When the chimney is about 100 meters high, a large crane is required for lowering the cut pieces. However, for example, when a large crane having a height of 100 meters is assembled, a space having a linear distance of at least 70 to 80 meters is required. In addition, a crane with a height of 100 meters must be placed about 30 meters away from the chimney. For this reason, when buildings such as houses and factories are densely located near the high chimney, there is a problem that a large crane cannot be arranged near the chimney.

  2. Description of the Related Art Conventionally, there are chimneys having a double structure composed of a steel inner cylinder for guiding smoke upward and a concrete outer cylinder for protecting the inner cylinder from the outside. Even in the dual structure chimney, there are one to a plurality of inner cylinders provided inside the outer cylinder. As a method of disassembling a conventional dual-structure chimney, the outer cylinder and the inner cylinder are cut at the same height, and the cut pieces are lowered to the ground using a large crane. The double structure chimney was dismantled by repeating this procedure.

  When disassembling a dual-structure chimney composed of an inner cylinder and an outer cylinder, a scaffold for disassembling the outer cylinder is provided outside the outer cylinder, but since the inner cylinder is separated from the outer cylinder, In the dismantling work, the scaffold for dismantling the outer cylinder could not be used. For this reason, when performing the disassembly work of the inner cylinder, it is necessary to install the scaffold for disassembling the inner cylinder between the inner cylinder and the outer cylinder. As a method for installing the scaffold for disassembling the inner cylinder, it is generally assembled and disassembled with a frame or a single pipe, but the space between the inner cylinder and the outer cylinder is made of steel with a height of about 20 m. Since the internal facilities such as the floor and the stairs are provided, the assembly and disassembly work of the inner cylinder disassembly scaffold requires two to three times as much time and labor as usual. In addition, when the chimney is as high as about 100 m, the wind load may exceed 20 m / sec at a point of 100 m or exceed 30 m / sec during a gust even if the wind load is about 10 m / sec on the ground. When the chimney is dismantled with a large crane, in the case of a 100 m chimney, the size of the tower crane is required to be about 500 t, and the allowable load is 10 to 20 t. In this case, the cutting size of the inner cylinder is generally about 9 m when the diameter is 3 m, and the pressure receiving area of the wind is very large compared with the case of suspending steel etc. Will receive. Therefore, it is necessary to be very careful with the wind, and the working time is limited. Especially in winter, there are cases where only half of the month can be worked. In addition, when the chimney is about 100 meters high, when the outer cylinder and the inner cylinder are disassembled with a large crane, the disassembled members are lowered to the ground outside the outer cylinder, and the workers on the ground are exposed to danger. It was.

  The present invention has been made in view of the above points, and ensures the safety of workers, eliminates the need to install a scaffold for disassembling the inner cylinder, and can perform the disassembling work without receiving a wind load. An object of the present invention is to provide a method and a device for disassembling a heavy chimney.

  A method for disassembling a double-structured chimney according to the present invention is a dismantling method for disassembling a double-structured chimney comprising an inner cylinder and an outer cylinder surrounding the inner cylinder. The lower part of the suspension mast whose length is variable and the upper part of the inner cylinder are fixed, and the suspension mast and the inner cylinder are suspended by the suspension moving means provided above the inner cylinder, and the suspension The lower part of the inner cylinder is cut while being suspended by the lowering movement means, the cut part is removed from the position, and the suspension mast and the inner cylinder are lowered by the suspension movement means. The lower end of the inner cylinder is placed on the ground, a new mast block is added to the suspension mast to increase the length of the suspension mast, and the suspension moving means to the suspension mast Change the holding position to Suspending the hanger in random order, and then cutting the lower part of the inner cylinder, adding a new mast block to the hanging mast and changing the holding position by the hanging moving means The procedure until the suspension mast is suspended in any order is repeated. The present invention is characterized in that an opening is formed in a lower side surface of the outer cylinder, and a cut portion of the lower part of the inner cylinder is carried out from the opening. In the present invention, a small crane is installed outside the outer cylinder, and the mast block of the suspension mast is lifted from the ground outside the outer cylinder or lowered to the ground outside the outer cylinder with the small crane. It is characterized by this. The present invention is characterized in that, before disassembling the inner cylinder, a cleaning device for cleaning the inside of the inner cylinder is inserted into the inner cylinder from above, and the cleaning device is moved up and down by a lifting means. Is. According to the present invention, after disassembling the inner cylinder, an internal work scaffold is attached to the lower end of the suspension mast on the ground inside the outer cylinder, and the mast block is removed in order from the suspension mast. The working scaffold is raised, and when it is raised, internal equipment such as a floor and stairs fixed to the inner wall of the outer cylinder is removed. The present invention is for dismantling the outer cylinder after disassembling the inner cylinder, and introducing a crusher having a length shorter in the lateral direction than the minimum inner diameter of the outer cylinder to the ground inside the outer cylinder. Then, the crusher is suspended by the suspension means and lifted above the upper end of the outer cylinder, and the length of the crusher in which the connecting material is fixed by fixing the connecting material to the crusher is set to the length of the outer cylinder. The crusher having a larger outer diameter and fixing the connecting material is placed on the outer cylinder, and then the outer cylinder is broken from the top to the bottom by the crusher. . The present invention is characterized in that the destruction of the outer cylinder destroyed by the crusher is dropped into the outer cylinder, and the destruction is carried out to the outside through an opening formed on the lower side surface of the outer cylinder. To do.

  The double structure chimney disassembly apparatus of the present invention is a disassembly apparatus for disassembling the inner cylinder of the double structure chimney comprising an inner cylinder and an outer cylinder surrounding the inner cylinder, and is provided above the inner cylinder. A suspension mast that is fixed to the inner cylinder and can be connected to or removed from a number of mast blocks to change its length, and is supported in a fixed state with the ground above the inner cylinder. The suspension mast is capable of holding the suspension mast and moving the suspension mast in the vertical direction, and has a suspension moving means capable of changing a holding position on the suspension mast. is there. According to the present invention, the suspension moving means includes a support beam supported in a fixed state on the ground above the inner cylinder, and is fixed to the support beam downwardly and includes at least a cylinder rod. Two hydraulic cylinders, a connecting member that is detachably attached to the ends of the cylinder rods and supports the suspension mast, and holds and releases the suspension mast And holding means.

  According to the method for disassembling a tower-like structure according to the present invention, the lower part of the inner cylinder is sequentially cut in a state where the inner cylinder is suspended from above, and the cut one is removed from the position, and then the outer cylinder is removed. Carry out sequentially from the opening. As described above, in the present invention, the inner cylinder is sequentially cut from the lower side at a predetermined height inside the outer cylinder. As a result, the present invention does not require a large crane and is less expensive than the conventional case where a portion destroyed using a large crane is lifted and lowered to the outside. In addition, since the conventional one uses a large crane, a long distance space is required for standing the large crane in the vicinity of the tower-like structure. In the present invention, such a long distance space is necessary. Therefore, dismantling is possible even if there is no space around the tower structure to be dismantled. In the present invention, the inner cylinder is disassembled by cutting the lower part of the inner cylinder inside the outer cylinder, and removing and cutting the cut portion from the position. Compared with the case of lowering to the ground, the worker can work safely. Further, it is not necessary to install a special scaffold during the disassembly work of the inner cylinder, and the dismantling work cost can be reduced. Further, since the wind load is not applied during the disassembly work of the inner cylinder, the work can always be performed even when the wind is strong.

  According to the tower-like structure dismantling apparatus according to the present invention, the inner cylinder and the suspension mast fixed to the upper part of the inner cylinder are suspended from above by the suspension moving means. The suspension mast can extend the length downward by connecting the mast blocks, and the suspension moving means can extend and contract the length in the vertical direction and change the holding position of the suspension mast. As a result, the lower portion of the inner cylinder can be cut while the inner cylinder is suspended from above. Furthermore, even if the length of the mast for suspension is extended downward by connecting the mast block and the inner cylinder is cut and its length is shortened, the lower end of the inner cylinder can be placed on the ground. It is possible to cut the lower part of the inner cylinder in a state where is installed on the ground.

  Next, the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state in which a scaffold and a crane used in the present invention are lifted upward around a tower-like structure. The double-structure chimney 10 according to the present invention includes an outer cylinder 12 made of reinforced concrete and a plurality of steel inner cylinders 14 provided therein. Note that there may be one inner cylinder 14. A plurality of masts 18 as lifting means formed by connecting a large number of mast blocks 16 are arranged around the outside of the chimney 10, and a base 19 is placed on the plurality of masts 18. The scaffold 20 is provided. On the base 19, for example, two upper masts 21 formed by connecting a number of mast blocks 16 are provided. The height of the upper mast 21 is assumed to be higher than the scaffold 20. The upper mast 21 is separate from the mast 18, but may be formed integrally with the mast 18. Below the plurality of masts 18, there are provided mast height adjusting devices 22 for simultaneously raising the masts 18. The scaffold 20 is moved to the upper part of the chimney 10 by connecting the mast block 16 to the plurality of masts 18 in order.

  Aside from the mast 18 for supporting and raising the scaffold 20, a crane mast 26 having a small crane 24 such as a climbing crane at the upper end is provided outside the chimney 10, and the mast block 16 is attached to the crane mast 26. By connecting in order, the small crane 24 is moved upward along the chimney 10. At this time, it is desirable that the small crane 24 be positioned sufficiently above the upper end of the chimney 10. The state which moved the scaffold 20 and the small crane 24 to the upper part of the chimney 10 from the state of FIG. 1 is shown in FIG. As shown in FIG. 2, the scaffold 20 is positioned near the upper end of the chimney 10, and the small crane 24 is positioned sufficiently above the upper end of the chimney 10.

  In the state of FIG. 2, the beam 23 is lifted from the ground by the small crane 24, and the beam 23 is assembled on the outer cylinder 12 like a cross beam as shown in FIG. 3. Two supporting masts 36 are attached on the beam 23 assembled in a cross beam shape. The height of the two supporting masts 36 is set higher than the height of the inner cylinder 14. Thereafter, as shown in FIG. 4, the support beam 38 is placed on the support mast 36 by the small crane 24 (FIG. 2), and the support beam 38 is fixed on the support mast 36. Further, the pulley 25, the winch 27 as the lifting means and the cleaning device 30 are placed on the support beam 38 by the small crane 24, and the pulley 25 and the winch 27 are fixed to the support beam 38. The support beam 38 is supported by a plurality of support masts 36 fixed on the beam 23. However, the support beam 38 may be supported by a fixed state from the ground, such as the upper mast 21 described above. The tip of the wire 29 is pulled out from the winch 27, the wire 29 is wound around the two pulleys 30 a of the cleaning device 30 from the pulley 25, and the tip of the wire 29 is fixed to the fixture 31 attached to the support beam 38.

  The cleaning device 30 is suspended by a wire 29 inside the inner cylinder 14. When the operator in the scaffold 20 operates the winch 27 with the remote controller, the cleaning device 30 moves up and down in the inner cylinder 14. The jetting operation of the cleaning liquid or the like from the cleaning device 30 is set to be operated by an operating means different from the winch 27. The cleaning of the inner cylinder 14 by the cleaning device 30 is performed in order from the upper part to the lower part of the inner cylinder 14, and the inner wall of the inner cylinder 14 to which dioxin or the like is attached is cleaned with a cleaning liquid or the like. For example, the cleaning device 30 is preferably configured to inject a cleaning liquid onto the inner wall of the inner cylinder 14 at a high pressure. Thereafter, water may be jetted.

  As shown in FIG. 2, an opening 32 is formed below the outer cylinder 12. Further, a horizontal hole (not shown) is opened in the lower side surface of the inner cylinder 14 to be cleaned by the cleaning device 30. As a result, the cleaning liquid or water that flows down after washing the inner wall of the inner cylinder 14 can be discharged to the outside of the chimney 10 via the lateral hole of the inner cylinder 14 and the opening 32 of the outer cylinder 12. The opening 32 of the outer cylinder 12 is set to a size that allows the machine for cutting the lower side of the inner cylinder 14 to be taken in and out of the cut member of the inner cylinder 14. After the cleaning of the inner cylinder 14 by the cleaning device 30 is completed, the cleaning device 30, the pulley 25, the winch 27, and the like are lowered to the ground by the small crane 24. The cleaning device 30 may be lowered to the ground inside the inner cylinder 14.

  After removing the pulley 25, the winch 27 and the like from the support beam 38, as shown in FIG. 5, for example, six (plural) hydraulic cylinders (suspending members) 40 having cylinder rods 40a below the support beam 38. To fix. The two cannulas 42 as connecting members can be attached to and detached from the ends of the pair of cylinder rods 40a. On the beam 23, a holding means 43 for temporarily holding a later-described suspension mast 44 (fixed to the upper portion of the inner cylinder 14) in the air is attached. The hydraulic cylinder 40, the cannula 42, the mast block 16 constituting the suspension mast 44, the holding means 43, and the like are lifted to the scaffold 20 by the small crane 24 and assembled by an operator.

  The suspension moving means 34 moves the suspension mast 44 in the vertical direction and changes its holding position. The suspension moving means 34 is supported on the ground (for example, the beam 23 and a plurality of supporting masts 36 attached on the beam 23) and the supporting mast 36. The support beam 38, a plurality of hydraulic cylinders (suspending members) 40 attached to the support beam 38 downward, and the tip (two pairs) of the cylinder rod 40a of the hydraulic cylinder 40 are detachably attached to each other. It consists of Kanuki 42 as a connecting member. The suspension moving means 34 may be a holding means 43 for temporarily holding the suspension mast 44 in the air.

  For example, six hydraulic cylinders 40 are arranged in the vertical direction, and a suspension mast 44 formed by connecting a number of mast blocks 16 is arranged at a substantially central position of the six hydraulic cylinders 40. . The suspension mast 44 is supported by, for example, six hydraulic cylinders 40 and, for example, three cannulas 42. In addition, although the number of cannulas 42 is three, it may be an even number of two or more. First, the three cannulas 42 are horizontally inserted into the mast block 16 at a predetermined position of the suspension mast 44, and both ends of the three cannulas 42 are fixed to the tip of the cylinder rod 40 a of the hydraulic cylinder 40. Thereafter, the hydraulic cylinder 40 is actuated to lift the three cannulas 42, and the hanging mast 44 is supported by the three cannulas 42. The reason why the hanging mast 44 is supported by the cannula 42 is that when the lower end of the inner cylinder 14 is cut, the inner cylinder 14 does not move downward and the suspended state of the inner cylinder 14 at that position is maintained. It is.

  When the hydraulic cylinder 40 is operated and the cylinder rod 40a is moved while the suspension mast 44 is suspended by the hydraulic cylinder 40 and the cannula 42, the suspension mast 44 moves up and down. The suspension mast 44 is suspended by the suspension moving means 34 above the inner cylinder 14 to be disassembled. A fixing means 46 is provided at the lower end of the suspension mast 44, and the fixing means 46 is fixed to the upper end of the inner cylinder 14 to be disassembled. That is, the inner cylinder 14 to be disassembled is suspended by the suspension moving means 34 via the suspension mast 44.

  Next, the disassembly work of the inner cylinder 14 will be described based on FIG. First, the suspension mast 44 and the inner cylinder 14 to be disassembled are fixed by the suspension moving means 34. Thereafter, an operator enters the inside of the outer cylinder 12 through the opening 32 at the lower part of the outer cylinder 12, and the inner cylinder 14 is moved in the horizontal direction by using, for example, a gas cutting device between the lower end of the inner cylinder 14 and the position of the height H from the lower end. Disconnect. Even if the lower end of the inner cylinder 14 is cut, since the inner cylinder 14 is suspended by the suspension moving means 34 and the suspension mast 44, the inner cylinder 14 will not fall. A portion of the inner cylinder 14 that has been cut (in the present invention, the expression “cut” includes “destructive”) is removed from the position and carried out of the opening 32 to the outside of the outer cylinder 12.

  Thereafter, the hydraulic cylinder 40 is operated to lower the suspension mast 44 and the inner cylinder 14, and the portion that becomes the lower end due to the cutting of the inner cylinder 14 is placed on the ground (a place fixed to the ground). Thereafter, a new mast block 16 is connected and added to the uppermost mast block 16 of the hanging mast 44. Further, in the suspension moving means 34, the cannula 42 is removed from the cylinder rod 40 a of the hydraulic cylinder 40, the cylinder rod 40 a of the hydraulic cylinder 40 is moved upward, and the cannula 42 is moved to the mast block 16 above the suspension mast 44. Is inserted and fixed to the cylinder rod 40 a of the hydraulic cylinder 40. Thereafter, the hydraulic cylinder 40 is slightly raised and the hanging mast 44 is held by the cannula 42. Thereby, the holding position of the suspension moving means 34 with respect to the suspension mast 44 can be changed. As described above, the lower portion of the inner cylinder 14 is cut and removed once, the new mast block 16 is additionally connected to the suspension mast 44, and the position where the suspension mast 44 is held by the suspension moving means 34 is determined. By making the change, the length of the suspension mast 44 can be lengthened downward, and the inner cylinder 14 can be lowered.

  Thereafter, the suspension mast 44 is lowered by the suspension moving means 34, and the lower end of the cut inner cylinder 14 is placed on the ground. Even in a state where the lower end of the inner cylinder 14 is placed on the ground, the suspension mast 44 and the inner cylinder 14 are suspended by the suspension moving means 34, and at a position of a height H upward from the lower end of the inner cylinder 14. An operator cuts the inner cylinder 14, removes the cut member from the position, and carries it out through the opening 32 of the outer cylinder 12. Thereafter, the hydraulic cylinder 40 of the suspension moving means 34 is operated again, the suspension mast 44 and the inner cylinder 14 are lowered, and the portion of the inner cylinder 14 which is cut and becomes the lower end is brought into contact with the ground. Thereafter, a new mast block 16 is added to the hanging mast 44 and the mounting position of the cannulas 42 on the hanging mast 44 is changed. Then, in a state where the suspension mast 44 is suspended by the suspension moving means 34, the operator cuts the inner cylinder 14 at a height H upward from the lower end of the inner cylinder 14. By repeating this operation, the inner cylinder 14 is sequentially cut and shortened, and the length of the suspension mast 44 becomes longer downward. Eventually, the inner cylinder 14 is completely disassembled. Note that either the operation of connecting and adding a new mast block 16 to the suspension mast 44 or the operation of changing the holding position to the suspension mast 44 by the suspension moving means 34 may be performed first.

  After disassembling the first inner cylinder 14, the second and third inner cylinders 14 are similarly disassembled. Thus, since the inner cylinder 14 cut in order from the lower part can be carried out from the opening 32 at the lower part of the outer cylinder 12 to the outside at every cut position, the disassembly of the inner cylinder 14 is performed on the ground inside the outer cylinder 12. The work is safe and the work is safe and does not adversely affect the outside.

  After disassembling all the inner cylinders 14, the lower end of the suspension mast 44 is positioned near the ground inside the outer cylinder 12, and the internal work scaffold 48 is fixed to the lower end of the suspension mast 44 (FIG. 6). . Thereafter, the hydraulic cylinder 40 of the suspension moving means 34 is operated to raise the suspension mast 44. After raising one mast block 16 of the suspension mast 44, the suspension mast 44 is supported by the holding means 43. Thereafter, the holding position of the cannula 42 on the hanging mast 44 is changed by detaching the cannula 42 from the cylinder rod 40a. Further, one mast block 16 is removed. Thereafter, the support of the suspension mast 44 by the holding means 43 is removed. Thereafter, the hydraulic cylinder 40 of the suspension moving means 34 is operated again, and the suspension mast 44 is raised. By repeating this work, the length of the suspension mast 44 can be shortened and the internal work scaffold 48 can be raised.

  When the internal work scaffold 48 is lifted, a worker on the internal work scaffold 48 disassembles the fixing member 50 such as a staircase fixed to the inner wall of the outer cylinder 12. The mast block constituting the support mast 36, the support beam 38, the hydraulic cylinder 40, the kanuki 42, and the suspension mast 44 after the internal work scaffold 48 rises to the highest position while disassembling the fixing member 50. 16 and the base 33 are lowered by the small crane 24 to the ground.

  Next, as shown in FIG. 7, for example, a beam 52 is spanned and fixed to the tips of the two masts 21. A plurality of support means 54 are fixed to the beam 52, a wire 58 drawn from the winch 56 is passed over the support means 54, and the wire 58 is operated by the winch 56. A suspension member 60 is attached in the middle of the wire 58, and the suspension member 60 is moved up and down at the central axis position inside the outer cylinder 12 by the operation of the winch 56. Since the suspension means is constituted by the support means 54, the winch 56, the wire 58, and the suspension member 60, and the structure that moves up and down using this suspension means has been conventionally known, the description thereof is omitted here.

  A crusher 62 for breaking the outer cylinder 12 is introduced into the outer cylinder 12 from the entrance 32 of the outer cylinder 12. A base support 64 is fixed under the crusher 62. The lateral lengths of the crusher 62 and the foundation support member 64 are set to be smaller than the inner diameter at any position of the outer cylinder 12. Thereafter, the suspension member 60 is connected to the crusher 62 to operate the winch 56, and the crusher 62 and the base support material 64 are lifted upward from the upper end of the outer cylinder 12. A connecting member 66 is connected to the base support member 64 above the upper end of the outer cylinder 12. By connecting the connecting member 66 to the base support member 64, the length of the connected member is made longer than the diameter of the outer cylinder 12. The arm 68 and the connecting member 66 of the crusher 62 having a long lateral length are lifted by the small crane 24 (FIG. 6) and attached to the crusher 62 and the foundation support member 64 by the scaffold 20 (FIG. 5).

  Thereafter, the crusher 62 can be placed on the outer cylinder 12 by operating the winch 56 and lowering the suspension member 60 (by connecting the connecting member 66 to the base supporting member 64, the base supporting member The length of the connecting member 66 connected to 64 is longer than the outer diameter of the outer cylinder 12). The crusher 62 placed on the outer cylinder 12 sequentially destroys the upper end of the outer cylinder 12 where it is not in contact with the connecting material 66, drops the destroyed one into the outer cylinder 12, and Unload from the opening 32 to the outside. Thereafter, the suspension member 60 is rotated to change the position where the connecting material 66 contacts the outer cylinder 12, and the outer cylinder 12 at the place where the connecting material 66 is not in contact with the crusher 62 before rotating again. Destroy the top edge. The broken part is dropped into the outer cylinder 12. Thus, the outer cylinder 12 can be disassembled from the top to the bottom by sequentially performing the operation of destroying the upper end of the outer cylinder 12 by the crusher 62 placed at the upper end of the outer cylinder 12. As a result, the inner cylinder 14 and the outer cylinder 12 can be disassembled in order, and the disassembled work can be removed from the outside of the outer cylinder 12.

It is explanatory drawing which shows the state which lifts the scaffold and crane used with the dismantling method of this invention upward of the circumference | surroundings of a double structure chimney. It is explanatory drawing of this invention which shows the state provided with a beam with a small crane in a position higher than an inner tower-like object. It is a top view which shows the state which attached the beam and the mast on the outer cylinder. It is explanatory drawing of this invention which shows the state which wash | cleans an inner columnar thing with a washing | cleaning apparatus. It is explanatory drawing of this invention which shows the state which cut | disconnects an inner columnar thing from the lower side and carries it outside. It is explanatory drawing of this invention which shows the state which removes the step provided in the inside of an outer side columnar thing. It is explanatory drawing of this invention which shows the state which mounted the crusher on the upper end of an outer columnar thing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chimney 12 Outer cylinder 14 Inner cylinder 16 Mast block 18 Mast 21 Upper mast 23 Beam 24 Small crane 26 Crane mast 32 Opening 34 Suspension moving means 38 Support beam 40 Hydraulic cylinder 40a Cylinder rod 42 Connecting member 43 Holding means 44 Suspension Lowering mast 48 Scaffolding for internal work

Claims (9)

  A disassembling method for disassembling a double-structured chimney comprising an inner cylinder and an outer cylinder surrounding the inner cylinder, the lower part of the hanging mast capable of connecting or removing a number of mast blocks and changing the length thereof, and The upper part of the inner cylinder is fixed, the suspension mast and the inner cylinder are suspended by a suspension moving means provided above the inner cylinder, and the inner cylinder is suspended by the suspension moving means. The lower part of the inner cylinder is removed from the position, the suspension mast and the inner cylinder are lowered by the suspension moving means, the lower end of the inner cylinder is placed on the ground, and the suspension is suspended. A new mast block is added to the mast for use to increase the length of the suspension mast, and the suspension mast is suspended by changing the holding position of the suspension moving means on the suspension mast. In random order, Then, since the lower part of the inner cylinder is cut, a new mast block is added to the suspension mast, and the suspension moving means changes the holding position to suspend the suspension mast; A method of dismantling a double-structured chimney characterized by repeating the procedure until the steps are performed in random order.   2. The method for disassembling a double-structured chimney according to claim 1, wherein an opening is formed in a lower side surface of the outer cylinder, and a cut portion of the lower part of the inner cylinder is carried out from the opening.   A small crane is installed outside the outer cylinder, and the mast block of the suspension mast is lifted from the ground outside the outer cylinder with the small crane or lowered to the ground outside the outer cylinder. The method for disassembling a double-structured chimney according to claim 1.   4. A cleaning device for cleaning the inside of the inner cylinder is inserted into the inner cylinder from above before disassembling the inner cylinder, and the cleaning apparatus is moved up and down by an elevating means. Dismantling method of double structure chimney.   After disassembling the inner cylinder, an internal work scaffold is attached to the lower end of the suspension mast on the ground inside the outer cylinder, and the mast block is removed in order from the suspension mast to remove the internal work scaffold. 2. The method for disassembling a double-structured chimney according to claim 1, wherein the internal equipment such as a floor and a staircase fixed to the inner wall of the outer cylinder is removed when the ascending.   After disassembling the inner cylinder, a crusher having a length shorter in the lateral direction than the minimum inner diameter of the outer cylinder is introduced to the ground inside the outer cylinder and suspended. The crusher is suspended by means and lifted above the upper end of the outer cylinder, and the length of the crusher in which the connecting material is fixed to the crusher and the connecting material is fixed is larger than the outer diameter of the outer cylinder. The duplexer according to claim 1, wherein the crusher to which the connecting material is fixed is placed on the outer cylinder, and then the outer cylinder is broken from the top to the bottom by the crusher. How to disassemble a structural chimney.   7. The destructive material of the outer cylinder destroyed by the crusher is dropped into the outer cylinder, and the destructive material is carried out through an opening formed in a lower side surface of the outer cylinder. The method for disassembling the double structure chimney described.   A dismantling device for disassembling the inner cylinder of a double-structured chimney consisting of an inner cylinder and an outer cylinder surrounding the inner cylinder, provided above the inner cylinder and fixed to the inner cylinder A suspension mast in which a number of mast blocks can be connected or removed to change the length thereof, and a suspension mast that is supported above the inner cylinder in a fixed state with the suspension and holds the suspension mast. A double-structure chimney dismantling apparatus comprising: a suspension moving means capable of moving the suspension vertically and changing a holding position on the suspension mast.   The suspension moving means is a support beam supported in a fixed state on the ground above the inner cylinder, and at least two hydraulic pressures fixed to the support beam downward and provided with a cylinder rod. A cylinder, a connecting member that is detachably attached to the ends of the cylinder rods and supports the suspension mast, and a holding means for holding and releasing the suspension mast The double-structure chimney dismantling apparatus according to claim 8, comprising:

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