JP2000136640A - Method and device for demolishing chimmney - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for demolishing a chimmney which can be sequentially demolished from the ground side to the top side in the vicinity of the ground without works on an elevated position. SOLUTION: A demolishing device 1 for a chimmney is installed in the vicinity of the ground in the cylindrical body 3 of the steel tower type chimmney 2. The demolishing device 1 is provided with a cylindrical body-supporting device 11 to vertically move the cylindrical body along the axial direction while supporting the cylindrical body 3, a cylindrical body-cutting device cutting the body from both inside and outside along the peripheral direction of the cylindrical body, etc. After the cylindrical body 3 has been supported and lifted by the supporting device 11, the external plates 4 is cut by a gas cutting device 24 and the lining 5 is cut by a water-jet chipping device 25, along the peripheral direction of the cylindrical body 3. The cut piece 60 is removed and the raised cylindrical body 3 is lowered and then, the steel tower is demolished by the length of cut piece 60 from the top side. By repeating the above processes, the cylindrical body 3 is demolished from the ground side and the steel tower is demolished from the top side alternately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for dismantling a chimney, for example, which is enclosed in a steel tower from the outside,
The present invention also relates to a chimney dismantling method and apparatus which can be applied to the operation of dismantling a steel tower type chimney fixed to and supported by a steel tower using a tower crane or the like.

[0002]

2. Description of the Related Art When a chimney is to be dismantled for reasons such as service life, in particular, when dismantling a tower-type chimney that is surrounded by a steel tower from the outside and fixed to and supported by the steel tower, It is a common practice to dismantle both the tubular body and the tower from their tops toward the ground side by working at heights.

Hereinafter, description will be made with reference to FIG. A tower-type chimney 101 serving as a chimney has a
03. In general, the tower 103 is composed of a main member 10 that is assembled substantially along the axial direction of the cylindrical body 102.
4, a horizontal support member 105 as a steel tower member assembled in a horizontal direction, and a diagonal member 106 for connecting the main member 104 and the horizontal support member 105 obliquely and reinforcing them.

In dismantling the cylinder 102 and the steel tower 103, a crawler crane 108 having a long tower 107 as a hoist is used. Using this crawler crane 108, a dismantling scaffold 109 for securing a worker's scaffold at a high place is suspended, and arranged on the top of the tubular body 102 and the steel tower 103 so as to surround them from the outside.

[0005] The worker gets on the dismantling scaffold 109 and performs dismantling work of the tubular body 102 and the steel tower 103 at a high place. The crawler crane 108 may be mounted on the demolition scaffold 109, or may be divided into individual pieces.
Use the to bring it to the ground at any time.

Thereafter, by repeating the above-described operation, the tubular body 102 and the steel tower 103 are sequentially disassembled from their top to the ground.

[0007]

However, the crawler crane 108 used for dismantling the above-mentioned tower-type chimney 101 is required.
Since the lease fee is very expensive, there is a possibility that the total cost of dismantling the tower-type chimney 101 will increase.

Further, the crawler crane 108 is included in a large class among hoists. When used, the crawler crane 108 is transported in a state where the tower 107 is disassembled to the site of dismantling work, assembled at the site of dismantling work, and then used. I do.
For this reason, a large working space for assembling the tower unit 107 is required near the ground of the tower type chimney 101.

Therefore, the tower-type chimney 101 to which the dismantling operation using the crawler crane 108 can be applied is easily limited, such as a place where the crawler crane 108 cannot be used depending on the location conditions of the tower-type chimney 101.

Further, in this dismantling method, since most of the chimney dismantling work is performed at a high place, it is difficult to ensure the safety of the worker, and at the same time, the worker is required to move between the ground and a high place. It takes time,
It is difficult to perform quick dismantling work.

The first problem to be solved by the present invention is as follows.
Demolition that dismantles the chimney cylinder from the ground side to the top without using a crawler crane that requires a large lease space among the hoists and requires a large work space for assembly work. An object of the present invention is to provide a chimney dismantling method capable of performing almost all operations near the ground.

It is still another object of the present invention to provide a method for dismantling a chimney in which a worker can engage in dismantling work in a safer environment and can perform the dismantling work more quickly.

A second object to be solved by the present invention is to disassemble a tower type chimney by the method according to the first aspect of the present invention. After disengagement of the chimney from the tower, almost all of the demolition work of dismantling the chimney body from the ground side toward the top can be performed near the ground, and the demolition work can be performed. In parallel with the above, it is an object of the present invention to obtain a chimney dismantling method capable of dismantling a steel tower from the top to the ground side.

A third object to be solved by the present invention is to disassemble a tower-type chimney according to the method of the second aspect of the present invention. Disassembly work that disengages the chimney cylinder from the ground side to the top side, while once releasing the engagement with the supporting tower and then supporting the cylinder body to the tower again so that it can move up and down. Of the chimney can be carried out near the ground, and in parallel with the dismantling work, a chimney dismantling method capable of dismantling the tower from the top to the ground side.

A fourth object of the present invention is to provide a chimney dismantling apparatus suitable for carrying out the method according to the first, second or third aspect of the present invention.

A fifth object of the present invention is to carry out the method according to the first, second or third aspect of the present invention, and to disassemble the chimney cylinder. Another object of the present invention is to provide a chimney dismantling device capable of easily performing a work of removing a cut piece after cutting a lower portion of a body of a chimney.

The sixth object to be solved by the present invention is suitable for carrying out the method of claim 1, 2, or 3 and is also suitable for claim 4 or claim 5. It is an object of the present invention to obtain a chimney dismantling device provided with a tube supporting device suitable as a component of the device.

A seventh object to be solved by the present invention is suitable for carrying out the method of claim 1, claim 2, or claim 3, and is also suitable for claim 4 or claim 5. It is an object of the present invention to obtain a chimney dismantling device provided with a tube cutting device suitable as a component of the device.

[0019]

According to a first aspect of the present invention, there is provided a method of dismantling a chimney according to the first aspect of the present invention, which comprises disassembling an existing chimney. A first means for supporting the tubular body near the ground using a tubular body support device capable of moving up and down, and cutting and removing the tubular body by a predetermined length below the support portion Second means, and third means for lowering the tubular body by the tubular body support device until the lower end of the tubular body lands,
A fourth means for raising only the tubular body support device and supporting the tubular body again, and thereafter, by repeating the means, the chimney is moved from the ground side toward the top toward the top near the ground. It is characterized by being dismantled.

Further, in order to solve the second problem,
A method for dismantling a chimney according to a second aspect of the present invention is a dismantling method for dismantling an existing tower-type chimney in which a tubular body is supported by a steel tower from the periphery. Means, and a second means for supporting the cylinder near the ground using a cylinder support device capable of supporting the cylinder and moving up and down, and the cylinder below the support portion. A third means for cutting and removing a predetermined length, a fourth means for lowering the tubular body by the tubular body support device until its lower end lands, and raising only the tubular body support device, again Fifth means for supporting the tubular body, and thereafter, by repeating the means, disassembling the steel tower type chimney near the ground from its ground side toward the top. Things.

Also, in order to solve the third problem,
In the method for dismantling a chimney according to a third aspect of the present invention, the steel tower is provided with a roller-type guide that supports the cylindrical body so as to be able to move up and down along the axial direction thereof, and guides the vertical movement of the cylindrical body. It is characterized by the following.

In order to solve the fourth problem,
The chimney dismantling device according to the invention of claim 4 is a dismantling device for dismantling an existing tower-type chimney in which a tubular body is supported by a steel tower from the surroundings, which is installed along the steel tower and is sequentially dismantled from the top of the steel tower. A tower crane for lowering / removing a tower member that has been removed to the ground, and a tube support device installed at the lower portion of the tube, supporting the tube and moving up and down, and installed at the lower portion of the tube, And a cylinder cutting device for cutting the cylinder body by a predetermined length.

In order to solve the fifth problem,
A chimney dismantling device according to the invention of claim 5 is a dismantling device for dismantling an existing tower-type chimney in which a tubular body is supported by a steel tower from the periphery, which is installed along the steel tower, and is sequentially dismantled from the top of the steel tower. A tower crane for lowering / removing a tower member that has been removed to the ground, and a tube support device installed at the lower portion of the tube, supporting the tube and moving up and down, and installed at the lower portion of the tube, A tubular body cutting device that cuts the tubular body by a predetermined length, and a delivery cart that is carried in and out between the lower end of the tubular body and the ground when the tubular body is cut by the tubular body cutting device, and And a fall prevention jack installed to support the lower end of the tubular body and to support the cut piece of the tubular body.

In order to solve the sixth problem,
In the chimney dismantling device according to the invention of claim 6, the cylinder support device is supported by guide columns provided along the axial direction of the cylinder near the ground of the cylinder so as to be movable up and down. In addition to being installed, the tubular body can be moved up and down while being supported from outside.

In order to solve the seventh problem,
In the chimney dismantling device according to the invention of claim 7, the cylinder cutting device is installed outside the cylinder, is capable of moving up and down along the axial direction of the cylinder, and injects high-pressure gas. A gas cutting device that cuts the outer wall material of the tubular body along the circumferential direction of the tubular body, and is installed inside the tubular body, and can move up and down along the axial direction of the tubular body, and A water jet type suspension device for injecting a high-pressure water flow to cut the inner wall material attached to the inside of the tubular body along the circumferential direction of the tubular body. .

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A chimney dismantling method according to a first embodiment of the present invention and a chimney dismantling device 1 for implementing the method will be described below with reference to FIGS.

The cylindrical body 3 of the tower-type chimney 2 as a chimney forms the cylindrical body 3 and supports an outer plate 4 as an outer wall material, which is attached to the inside thereof. And the skin 4 is directly damaged by smoke,
It has a two-layer structure with two types of members, a lining 5 as an inner wall material, which prevents it from being rapidly deteriorated.

As shown in FIG. 7, the tower-type chimney 2 is surrounded around a tubular body 3 by a tower 9 composed of a main member 6 as a tower member, a horizontal support member 7, and a diagonal member 8. At the same time, it is fixed to and supported by the steel tower 9 from outside the cylindrical body 3 by a support jig (not shown).

Hereinafter, a chimney dismantling device 1 according to a first embodiment of the present invention will be described.

FIGS. 1A and 1B are perspective views showing a chimney dismantling device 1 according to a first embodiment of the present invention. The chimney dismantling device 1 implements the chimney dismantling method according to the first embodiment.

On the side of the cylindrical body 3, two guide columns 10 are arranged along the axial direction of the cylindrical body 3 to a height of several meters above ground or about several tens of meters above the outside so as to sandwich the diameter direction from both outer sides. It is assembled and attached. The tubular body support device 11 of the chimney dismantling device 1 described later is supported by the two guide columns 10 and can be moved up and down while being guided along the axial direction of the tubular body 3.

The chimney dismantling device 1 includes a ring-shaped tube supporting device 11 that can be moved up and down along the axial direction while supporting the tube 3, and the tube supporting device 11 is attached to the guide column 10. A hydraulic jack 13 for guiding the cylinder body 3 to move up and down along the axial direction of the cylinder body 3; and a cylinder body cutting device 12 capable of cutting the cylinder body 3 independently from both inside and outside thereof along its circumferential direction. have.

As shown in FIGS. 2 and 3, the hydraulic jack 1
Numerals 3 are arranged one inside each of the two guide posts 10 so as to be able to move up and down inside the guide posts 10 along the longitudinal direction.

Each of the two guide posts 10 has a rectangular support pin hole 14 that penetrates and connects the surfaces of the guide posts 10 that do not face the cylindrical body 3 among the surfaces of the guide posts 10. They are provided at regular pitch intervals along the longitudinal direction. An upper support pin 16 provided at the upper end 15 of the hydraulic jack 13 so as to be able to move in and out and a lower support pin 18 provided at a lower end 17 of the hydraulic jack so as to be able to move in and out of the support pin hole 14.

The tubular body supporting device 11 is attached to the tubular body 3 by a tubular body supporting device supporting member 19 extending from the upper end 15 of each of the two hydraulic jacks 13 along the radial direction of the tubular body 3. It is held movably up and down along the axial direction.

On the outer periphery of the cylindrical body 3, a plurality of cylindrical body supporting projections 20 are provided at regular intervals along the circumferential direction and the axial direction. The cylindrical body support device 11 is provided with a cylindrical body so that when the cylindrical body support device 11 is moved up and down along the axial direction of the cylindrical body 3, the cylindrical body support projection 20 does not hinder the vertical movement. A plurality of notch grooves 21 for allowing the support protrusions 20 to pass through are provided along the arrangement of the cylinder support protrusions 20 along the axial direction of the cylindrical body 3.

On the upper surface 22 of the tubular body support device 11,
While supporting the tubular body 3 from the outside using the tubular body support device 11 and moving the tubular body 3 up and down along the axial direction, the tubular body 3 is hooked below the tubular body support projection 20 to support the tubular body 3. Are provided on the upper side of the notch groove 21 one by one.

The cylinder supporting claw 23 is slidably mounted on the cylinder supporting apparatus upper surface 22 along the radial direction of the cylinder 3. In the case of simply moving the barrel support device 11 up and down along the axial direction of the barrel 3, the barrel support claw 23 is slid radially outward of the barrel 3 to open the upper side of the notch groove 21, The cylindrical body support convex portion 20 is passed through it.

When the cylindrical body 3 is moved up and down while supporting the cylindrical body 3 by using the cylindrical body supporting device 11, the cylindrical body supporting projection 20 should not pass through the cutout groove 21. Then, the cylindrical body supporting claw 23 is slid inward in the radial direction of the cylindrical body 3, and the upper side of the cutout groove 21 is closed to close the lid. While maintaining the state, the cylinder supporting device 11 is lifted from below the cylinder supporting protrusion 20, so that the cylinder supporting claw 23 is hooked below the cylinder supporting convex 20 to support the cylinder 3. .

As shown in FIG. 4, a tubular body cutting device 12 for cutting the tubular body 3 along its circumferential direction is a gas type device for cutting the outer plate 4 on the outside of the tubular body 3 from the outside by high pressure gas. A water jet type suspension device 25 for cutting the lining 5 inside the tubular body 3 from the inside thereof by a high-pressure water stream is provided with a cutting device 24.

The gas type cutting device 24 is mounted on a ring-shaped scaffold 26 having substantially the same size as the tubular body supporting device 11.
The scaffold 26 is supported by a plurality of wire ropes 27 made by twisting steel wires made of iron or the like.
Hanged from.

The ring-shaped scaffold 26 is attached to the cylindrical body support device 11.
The distance between the inside of the scaffold 26 and the tubular body 3 so that the inside of the scaffold 26 is not caught by the tubular body support protrusion 20 provided outside the tubular body 3 when the ascending and descending movement is performed along with Are formed so as to be vacant by the same degree as the depth of the cutout groove 21 of the tubular body support device 11.

The scaffold 26 is provided with a gas-type cutting device guide rail 29 along its inner peripheral surface 28, and the gas-type cutting device 24 is guided by the gas-type cutting device guide rail 29 via a carriage 30. Then, it can go around the outside of the cylindrical body 3.

The gas-type cutting device 24 has a gas nozzle 31 for injecting high-pressure oxygen and air, and a gas supply pipe 32 for supplying high-pressure oxygen and air to the gas nozzle 31. The gas supply pipe 32 is connected to a high-pressure oxygen cylinder (not shown) arranged on the ground and an air compressor (not shown).

The gas nozzle 31 and the gas supply pipe 32 are integrally held by a holder 33. Further, the holder 33 is a gas nozzle positioning for finely adjusting the height of the tip of the gas nozzle 31 along the axial direction of the cylindrical body 3 and finely adjusting the distance between the outer plate 4 and the radial direction of the cylindrical body 3. Device 34
Attached to.

In order to actually determine the position of the tip of the gas nozzle 31, for example, an operator operates a controller (not shown) while visually confirming the position. The command signal output from the controller is also input to a control unit (not shown). The controller processes the command signal as height position information and lateral position information, and then sends the signal to the gas nozzle positioning device 34. The gas nozzle positioning device 34 finely adjusts the position of the tip of the gas nozzle 31 based on the transmitted information.

Thus, the cutting position of the tubular body 3 by the gas-type cutting device 24 can be kept constant, and the outer plate 4 can be kept from the outside while keeping the gas pressure on the outer plate 4 constant. It can be cut along the circumferential direction of the tubular body 3.

The water-jet type suspension device 2
Reference numeral 5 is mounted on a gondola 35 that can move up and down inside the cylindrical body 3 along its axial direction. The water jet suspension device 25 has a water jet nozzle 36 for jetting a high pressure water flow, and a hose 37 for supplying a high pressure water flow to the water jet nozzle 36. The hose 37 is connected to a pump 38 for applying high pressure to the water flow, which is arranged on the ground.

Similarly to the scaffold 26, the gondola 35 is suspended from above the cylindrical body 3 by a plurality of wire ropes 27 made by twisting steel wires made of iron or the like. In the first embodiment, the gondola 35 is suspended using a tower crane 39.

In the gondola 35, a turning device 40 for rotating the water jet suspension device 25 along the circumferential direction of the cylindrical body 3 is sandwiched between upper and lower disks 41 and 42 from both sides in the vertical direction. It has a configuration.

On the upper surface of the upper disk 41, a plurality of hanging brackets 43 for connecting a plurality of wire ropes 27,
The water jet type is provided with two gondola fixing jacks 44 for preventing swinging of the gondola 35 during cutting work of the lining 5 by the hanging device 25 and maintaining the height position. The two gondola fixing jacks 44 are installed at an interval of 180 ° so as to face each other along the diametrical direction of the upper disk 41.

When moving the gondola 35 up and down,
Fixed arm 45 of each gondola fixing jack 44
Is shortened. Then, before the cutting operation of the lining 5 is started, each fixed arm 45 is extended outward in the diametrical direction of the upper disk 41, and each fixed arm tip 4
The gondola 35 is fixed by pressing the 6 against the lining 5.

Thus, the water jet type suspension device 25 moves the lining 5 from the inner side thereof in the circumferential direction of the cylindrical body 3 in a stable state without the gondola 35 swinging and the height position of the gondola being largely changed. Can be cut along. After the cutting operation of the lining 5 is completed, the fixed arm 45 is contracted again,
9, the gondola 35 is moved up and down.

On the upper surface of the lower disk 42, two guide devices 48 having wheels 47 for rotating the water jet type suspension device 25 in a stable state are installed. The water jet suspension device 25 is installed below one wheel 47 of the two guide devices 48.

Similarly to the gondola fixing jack 44, these two guide devices 48 are also installed at an interval of 180 ° so as to face each other along the diameter direction of the lower disk 42. When moving the gondola 35 up and down, the radial guide arms 49 of the two guide devices 48 are contracted. Before starting the cutting operation of the lining 5, the respective radial guide arms 49 are extended toward the diametrically outer side of the lower disk 42, and the wheels 47 provided at the tips of the respective radial guide arms 49.
To the lining 5.

Thus, the lining 5 is rotated from the inner side of the cylindrical body 3 while the water jet type suspension apparatus 25 is smoothly rotated without rattling along the circumferential direction of the cylindrical body 3 using the turning device 40. , Can be cut along the circumferential direction of the tubular body 3.

Further, each of the two guide devices 48 also has an axial guide arm 50. By extending and contracting the axial guide arms 50 before starting the cutting of the lining 5 and during the cutting operation, the water jet type is disposed at the height position of the cutting of the lining 5 by the suspension device 25 and at the outside of the tubular body 3. The height position at which the outer plate 4 is cut by the gas-type cutting device 24 can be adjusted and adjusted as needed. After the lining 5 is cut, the radial guide arm 49 is contracted again to move the gondola 35 up and down.

The height adjustment of the wheels 47 of the guide device 48 and the water jet nozzle 36 of the water jet suspension device 25 along the axial direction of the tubular body 3 can be adjusted, and the gas nozzle of the gas type cutting device 24 can be adjusted. The adjustment is performed in the same manner as in the case of the position adjustment of 31.

In order to actually determine the height position of the wheel 47 of the guide device 48 and the water jet nozzle 36 of the water jet type suspension device 25 along the axial direction of the cylindrical body 3, for example, an operator may visually check the height position. While confirming, the controller (not shown) is operated. The command signal output from the controller is also input to a control unit (not shown). The controller processes the command signal as height position information, and then sends the signal to the guide device 48. The guide device 48 finely adjusts the height position of the tip of the wheel 47 and the water jet nozzle 36 based on the sent information.

The water-jet type suspension device 2
The height position of the wheel 47 of the guide device 48 on the side where no 5 is provided is always the water jet type suspension device 25.
Is adjusted to the height position of the wheel 47 of the guide device 48 on the side where is provided. As a result, the lower disk 4 is maintained while the rotation axis of the lower disk 42 is kept in the axial direction of the cylindrical body 3.
2 can rotate, and the height position of the cut of the lining 5 can be kept constant.

The tubular cutting device 1 comprising the gas-type cutting device 24 and the water-jet type hanging device 25 described above.
As shown in FIG. 5, the outer plate 4 and the lining 5 of the cylindrical body 3 are moved along the circumferential direction of the cylindrical body 3 by using
The cutting can be performed at a fixed height position in parallel and independently from the outside and the inside of the tubular body 3.

Prior to the dismantling of the tower type chimney 2, FIG.
The tower crane 39 is installed along the axial direction of the tubular body 3 while being fixed to the steel tower 9 as shown in FIG. As described later, in the chimney dismantling method of the present invention, the steel tower 9 is sequentially dismantled from the top to the ground side. for that reason,
The crane main body 51 is set in advance so that the hook 52 pulled out from the crane main body 51 of the tower crane 39 is positioned higher than the steel tower 9.

The tower crane 39 includes a crane body 51.
Can move up and down along the tower 53 that supports it. The tower 53 has a number m (not shown).
By sequentially adding an arbitrary number of divided pieces from the ground, it is possible to build up to a desired height.

When the tower crane 39 is lifted upward from the ground, first, the first piece of the above-mentioned divided piece (not shown) is firmly fixed on the ground together with the tower base 54 on the side of the steel tower 9.

Next, the crane main body 51 is lifted using, for example, a truck crane (not shown), and is inserted into a through hole (not shown) provided in the crane main body 51.
The crane main body 51 is installed on the tower 53 while the first divided piece is inserted from below.

Thereafter, when the operator operates the crane main body 51, the divided pieces are carried one by one by the hooks 52 pulled out from the crane main body 51, and the crane main body 51 is then supported by the divided pieces. Tower part 5
3 is fixedly added to the upper end.

When the tower 53 is extended upward by adding the divided pieces, as shown in FIG. 7, the tower 53 is fixed to the steel tower 9 by using the fixing member 55 in some places. By doing so, it is possible to prevent the tower portion 53 that has been stacked high from swaying or falling down due to a strong wind or the like. Further, the stability of the crane main body 51 supported by the tower 53 is increased, and the safety of a worker who operates the crane main body 51 at a high place is more easily ensured.

Since the crane main body 51 is provided with a drive mechanism (not shown) for moving up and down, the worker operates the crane main body 51 as described above to carry up the divided pieces one by one to add to each other. As it moves, it can gradually ascend itself by the length of the added divided piece.

Thereafter, by repeating the above-described operation, the crane main body 51 can reach the target height.

When the dismantling of the tower 9 and the tubular body 3 proceeds and the crane body 51 descends from above toward the ground, the work of stacking the tower 53 is reversed. Just do the work.

First, the crane main body 51 is lowered to the lower one of the divided pieces on which the crane main body 51 is supported at that time. Then, the crane body 51
The whole of the divided piece on which is supported projects above the tower portion through-hole. Next, after releasing the engagement between the tower portion 53 on which the crane main body 51 is supported at that time and the protruding divided piece, the divided piece is hooked on the hook 52.
And carry it down to the ground.

Thereafter, the lowering movement of the crane main body 51 and the division work of the tower section 53 are performed alternately with the progress of the dismantling work of the steel tower 9 and the tubular body 3, so that the crane main body 51 can move on the ground by itself. You can come down to.

When the crane main body 51 has descended to the divided piece fixed to the tower base 54 on the ground, the operation of the crane main body 51 by the operator is finished. Thereafter, in the same manner as described above, the crane main body 51 is lifted by using, for example, a truck crane (not shown), and the divided pieces are pulled out from the through holes in the tower portion.

The crane body 51 is withdrawn from the work site and cleared. Further, the divided piece fixed to the tower base 54 is separated from the divided base and cleared, and the tower base 54 is also crushed and processed.

As described above, the tower crane 39 does not require a large work space near the ground around the tower 9 during the dismantling work of the tower 9 and the tubular body 3 and before and after the dismantling work. In addition, the tower crane 39 is easy to build, has high mobility, and has a wide working range.
It can be used for dismantling work of the tower type chimney 2 under various location conditions.

Further, since it is not necessary to rent a crawler crane until a very high lease fee is paid, the total cost of dismantling the tower-type chimney 2 can be reduced.

Next, a chimney dismantling method according to the first embodiment of the present invention using the above-described chimney dismantling device 1 of the present invention will be described.

First, the chimney dismantling device 1 of the present invention described above is attached to a steel tower type chimney 2.

As shown in FIG. 1, the guide column 10 is
2 so that its diametrical direction is sandwiched from both outsides.
Install the book.

Next, the ring-shaped scaffold 26 is once carried up to the upper side of the top of the tubular body 3 using the tower crane 39,
While inserting the tubular body 3 from the position inside the scaffold 26,
Carry down to the ground.

Next, the ring-shaped cylinder supporting device 11 is once carried up to the top of the cylinder 3 using the tower crane 39 together with the hydraulic jack 13, and the cylinder is moved from the position to the inside of the cylinder supporting device 11. With the body 3 inserted, carry it down to near the ground.

At this time, the cylinder support claw 23 of the cylinder support 11 is moved outward so that the cylinder support 11 is not caught by the cylinder support projection 20 provided on the outer periphery of the cylinder 3. Then, the notch 21 is completely opened. Also, care should be taken not to crush the scaffold 26 installed prior to the installation of the tubular body support device 11.

[0086] The tubular body support device 11 and the hydraulic jack 1
3 once brought down to near the ground, and then hydraulic jack 1
3 is stored inside the guide pillar 10 installed earlier from above.

As shown in FIG. 3, the surfaces of the two guide pillars 10 facing the cylindrical body 3 have an open shape.
The hydraulic jack 13 is stored in the guide post 10 while taking care that the support member 19 for the tubular body supporting device is accommodated therein. At this time, the upper and lower ends of the hydraulic jack 15 and the hydraulic jack 17 are respectively prevented so that the upper support pin 16 and the lower support pin 18 do not strike the guide post 10.
To be stored inside.

While the hydraulic jack 13 is stored in the guide post 10, the tubular body supporting device 11 is gradually lowered toward the ground. When the tubular body support device 11 approaches the scaffold 26 previously installed, the tubular body support device 11 is spaced apart from each other by, for example, about several tens cm to 1 m so as not to crush the scaffold 26. Then, the lowering of the cylinder supporting device 11 is stopped.

While maintaining this state, the hydraulic jack 13
Is adjusted so that the upper support pin 16 and the lower support pin 18 can be inserted into the support pin holes 14 of the guide pillar 10, respectively. After the adjustment is completed, the upper support pin 16 and the lower support pin 18 are projected from the hydraulic jack upper end 15 and the hydraulic jack lower end 17, respectively, and inserted into the support pin holes 14. Thereby, the cylinder support device 11 and the hydraulic jack 13 can be installed on the cylinder 3 and the guide pillar 10 without crushing the scaffold 26.

Next, the gondola 35 is placed on the ground inside the cylindrical body 3.
Is placed once. The wire rope 27 connected to the hanging bracket 43 of the gondola 35 is hooked by the hook 52 of the tower crane 39, carried once to the upper side of the top of the tubular body 3, and the gondola 35 is placed inside the tubular body 3 from that position. And once placed on the ground inside the tubular body 3.

Lastly, the tubular body support device 11 and the scaffold 26 are connected by a wire rope 27 and the gas-type cutting device 2
4, and a water jet type cutting device 25, respectively, an oxygen cylinder, an air compressor (not shown) installed on the ground,
Alternatively, it is connected to the pump 38.

After the tubular body support device 11 and the hydraulic jack 13 are attached to the guide post 10,
In order to more securely install and support the guide column 10, the fixing cover 56 for fixing and supporting the guide column 10 to the steel tower 9 is shown in FIG.
As shown in (1), it is attached to the upper part of the guide column 10 and it is fixed to the steel tower 9.

The operation of attaching the chimney dismantling device 1 to the tubular body 3 has been completed, except for the unloading cart 61 and components around it, which will be described later. This chimney dismantling device 1
Before the dismantling work of the tower-type chimney 2 is started, only a part of the work of attaching to the tubular body 3 needs to be performed by working at high places. Subsequent dismantling work and the withdrawal work of the chimney dismantling device 1 can be performed almost all near the ground. Therefore, during the dismantling work of the tower type chimney 2, the worker can be engaged in the dismantling work in an extremely safe environment.

Here, before starting the dismantling work of the tubular body 3 and the steel tower 9, the support of the tubular body 3 by the steel tower 9 is released. Instead, roller guides 57 for supporting the cylindrical body 3 so as to be able to move up and down along the axial direction are attached to a plurality of locations of the horizontal support 7 of the steel tower 9 as shown in FIG.

By using this roller type guide 57,
Even if the cylindrical body 3 moves up and down along the axial direction, the cylindrical body 3 can be always stably supported by the rotation of the roller 58 provided at the tip of the roller type guide 57. Therefore, the possibility that the tubular body 3 falls down during the dismantling work is extremely low, and the tubular body 3 and the steel tower 9 can be dismantled more safely.

Next, the tubular body 3 and the tower 9 are dismantled.

First, the tubular body 3 is cut. The tubular body support device 11 and the scaffold 26 installed earlier are raised along the axial direction of the tubular body 3 while operating the hydraulic jack 13 to guide the guide pillar 10.

A detailed description will be given. In the installed state as described above, only the upper support pin 16 is pulled out from the support pin hole 14 and housed inside the hydraulic jack upper end 15. Next, the hydraulic jack 13 is extended, and the upper end 15 of the hydraulic jack is pushed up to a height at which the upper support pin 16 can be inserted into the upper support pin hole 14. At this position, the upper support pin 16 is made to protrude from the upper end 15 of the hydraulic jack and inserted into the support pin hole 14 to support the upper end 15 of the hydraulic jack.

The length of the extension of the hydraulic jack 13 at this time can be changed to an arbitrary length at any time according to the judgment of the worker at the site. For example, the pitch may be one pitch, which is the interval between the adjacent support pin holes 14, or three pitches.

Subsequently, similarly to the hydraulic jack upper end portion 15, the hydraulic jack lower end portion 17 is also raised. The lower support pin 18 is housed in the lower end 17 of the hydraulic jack and pulled out from the support pin hole 14. Thereafter, the hydraulic jack 13 is contracted while the hydraulic jack 13, the tubular body support device 11, and the scaffold 26 are supported by the upper support pin 16, and the hydraulic jack lower end 17 is raised.

At this time, as in the case described above, the hydraulic jack 13 is contracted when the lower end 17 of the hydraulic jack is raised to the desired position of the support pin hole 14 based on the judgment of the worker at the site. Is stopped, the lower support pin 18 is made to protrude from the lower end 17 of the hydraulic jack, and is inserted into the support pin hole 14 to support the lower end 17 of the hydraulic jack.

By repeating the above operation, the tubular body support device 11 and the scaffold 26 are raised. Note that the expansion and contraction operation of the hydraulic jack 13 may be completely opposite to the above description.

First, the lower end 17 of the hydraulic jack and the guide post 1
After releasing the lock state with zero, the hydraulic jack 13 is contracted to raise the hydraulic jack lower end portion 17 and locked to the guide column 10 again at an appropriate height. Next, after releasing the locked state of the hydraulic jack upper end portion 15 and the guide post 10, the hydraulic jack 13 is extended to raise the hydraulic jack upper end portion 15, and is again locked to the guide post 10 at an appropriate height. .

Even if the hydraulic jack 13 is operated in the above sequence to repeat the expansion and contraction operation,
And the scaffold 26 can be raised.

At this time, the gas nozzle 31 and the gas supply pipe 32 of the gas-type cutting device 24 mounted on the scaffold 26 are connected in the same manner as in the case of attaching the tube supporting device 11 to the tube 3 described above. The cylinder support protrusion 20 should not be hit. Gas nozzle 3 with gas nozzle positioning device 34
1 outside the scaffold 26 or the gas nozzle 3
The truck 30 is moved along the gas-type cutting device guide rail 29 together with the gas supply pipe 32 and the gas nozzle 31.
Is shifted.

After the scaffold 26 has left the ground, the cylinder 3
The fixing and support to the tower-type chimney base 59 as the chimney base are released. Thereby, the work of lifting the tubular body 3 by the tubular body support device 11 described later can be performed.

Next, the scaffold 26 is lifted to the approximate cutting position of the target tubular body 3 while being suspended from the tubular body support device 11 with the wire rope 27, and is disposed. Subsequently, the cylinder supporting device 11 is further raised, and at this time, the cylinder supporting claw 23 is hooked from below on the cylinder supporting protrusion 20 located at the closest position above the upper surface 22 of the cylinder supporting device. Body 3
Lift while supporting.

This will be described in detail. At the time of attaching the tubular body support device 11 to the tubular body 3 described above, the tubular body support claws 23 that have been moved outward are moved inward, and the cutout grooves 21 are completely closed. In this state, the expansion / contraction operation of the hydraulic jack 13 is repeated one pitch at a time, and the cylinder body supporting device 11 is slowly raised. By directly hooking the tubular body supporting claw 23 from below the tubular body support projection 20, the tubular body support device 11 supports the tubular body 3,
The tubular body 3 is lifted along its axial direction.

Thereafter, while the supporting state is maintained, the above-described expansion and contraction operation of the hydraulic jack 13 is repeatedly performed, and the cylinder body 3 is lifted up in the axial direction until reaching the target height. When the desired height is reached, the expansion / contraction operation of the hydraulic jack 13 is stopped, and the cylinder support device 11 and the cylinder 3
Stop rising.

The cylindrical body 3 by the cylindrical body supporting device 11
The lifting operation of the hydraulic jack 13 may be performed from either the upper end 15 of the hydraulic jack or the lower end 17 of the hydraulic jack.

Next, the gondola 35 once disposed on the ground inside the cylindrical body 3 as described above is lifted again using the tower crane 35. The operator checks the gas nozzle 3 of the gas-type cutting device 24 mounted on the scaffold 26 while checking from the ground.
1 and the water jet nozzle 36 of the water jet type suspension device 25 mounted on the gondola 35
The gondola 35 is lifted and arranged until the height of the gondola 35 becomes the same position.

Here, before starting the cutting operation of the tubular body 3, in order to remove the cut tubular body cutting pieces 60 from below the tubular body 3 in a state of being lifted, one of the chimney dismantling devices 1 described above is used. The unloading cart 61 is disposed below the cylindrical body 3.

As shown in FIG. 1 and FIG. 7, first, an unloading rail 62 for arranging the unloading cart 61 so as to be able to be taken in and out is provided directly below the raised cylindrical body 3. From the top of the tower-type chimney base 59
Lay it out to the outside. An unloading cart 61 is movably disposed thereon.

[0111] Under the unloading platform 63 of the unloading cart 61, there are unloading cart wheels 6 that can roll on the unloading rail 62.
Because of the provision of the tubular member 4, the heavy tubular body cutting piece 60 can be easily moved from below the tubular body 3 with a slight force while being placed on the carry-out carriage 61, and can be removed.

On the upper side of the carry-out stand 63, a gap S between the upper surface of the carry-out stand 63 and the lower end 65 of the raised cylindrical body 3 is filled, and a fall prevention for supporting the cylindrical body 3 in that state from below is provided. Jack 66 is installed. By using the fall prevention jack 66, the cut tubular body cutting piece 60 can be prevented from suddenly falling.

Further, in this embodiment, the cylinder support 67 for supporting the cylinder 3 in a more stable state.
Is placed on the fall prevention jack 66. By using the tubular body support base 67, the tubular body 3, and thus the cut tubular body piece 60 after cutting, can be supported by a wide ring-shaped surface from below.

As a result, the possibility that the cut piece 60 of the tubular body comes off the upper end 68 of the fall prevention jack 66 due to some unexpected impact, falls as it is, and rolls in an arbitrary direction can be extremely reduced.

After the lower end 65 of the tubular body 3 is supported by the tubular body support 67 as described above, the cutting operation of the tubular body 3 is started.

As described above, the gas nozzle 31 of the gas type cutting device 24 and the water jet nozzle 36 of the water jet type hanging device 25 are already arranged at the same height. In this state, as shown in FIG. 5, the outer plate 4 is applied from the outside of the tubular body 3 by the gas-type cutting device 24, and the lining 5 is applied from the inside of the tubular body 3 by the water-jet type suspending device 25. Cut along the circumferential direction.

First, the water jet type suspension device 2
5 cuts the lining 5. Gondola fixed jack 4
In 4, the gondola 35 is fixed inside the cylindrical body 3. Subsequently, the wheel 47 is pressed against the lining 5 while finely adjusting the position of the tip of the water jet nozzle 36 with the guide device 48. Thereafter, a water stream, which has been raised to an appropriate water pressure by a pump 38 installed on the ground, is jetted from a water jet nozzle 36 through a hose 37 and blown onto the lining 5. At the same time, the turning device 4 of the gondola 35
In the water jet type, the lower disk 42 is rotated together with the suspension device 25 while operating the wheel 0 to guide the inside of the cylindrical body 3 along the circumferential direction by the wheels 47.

Thus, the lining 5 can be cut at a constant height along the circumferential direction of the cylindrical body 3. After confirming that the suspension device 25 has made one rotation and the lining 5 has been completely cut, the operation of the suspension device 25 is stopped.

Next, the outer plate 4 is cut by the gas type cutting device 24. While finely adjusting the position of the gas nozzle 31 with the gas nozzle positioning device 34, high-pressure gas is sent from a high-pressure oxygen cylinder (not shown) installed on the ground, an air compressor, or the like, and is injected from the gas nozzle 31 through the gas supply pipe 32. Spray on outer plate 4. At the same time, the carriage 34 together with the gas-type cutting device 24 is moved to the gas-type cutting device guide rail 2.
The outer periphery of the tubular body 3 is rotated while being guided along the circumferential direction by 9.

Thus, the outer plate 4 can be cut at a constant height along the circumferential direction of the cylindrical body 3. After confirming that the gas-type cutting device 24 has completed one rotation and the outer plate 4 has been completely cut, the operation of the gas-type cutting device 24 is stopped.

By the above cutting operation, as shown in FIG. 1B, the cylindrical body 3 can be cut at a constant height along the circumferential direction.

Since the tubular piece 60 and the tubular body 3 are completely separated from each other, the jack 6 for preventing the carry-out cart 61 from falling is used.
By shrinking the tube 6 and lowering the cutout piece 60, the cutout piece 60 can be pulled out from the inside of the scaffold 26, and the gondola 35 can be pulled out from the cut piece 60. After that, the tubular body cutting piece 60 is transferred to the unloading trolley 6.
Pull it out from under the tube body 3 together with 1.

As described above, by using the carry-out carriage 61, the tubular body cutting piece 60 can be easily pulled out from below the tubular body 3, so that the cutting operation of the tubular body 3 performed intermittently can be performed. , The vertical movement of the tubular body 3 can be quickly performed. As a result, it is possible to greatly reduce the time required for dismantling the steel tower type chimney 2.

On both sides of the carry-out rail 62 extended to the outside of the steel tower 9, there are provided tubular body cut piece receiving stands 69 for replacing the tubular body cut pieces 60 from the carry-out cart 61. . The unloading cart 61 on which the tubular body cutting pieces 60 are placed is moved to the vicinity of the tubular body cutting piece receiving table 69, and the loading body truck (not shown), for example, a forklift, is used to remove the tubular body cutting pieces 60 to the unloading cart 61. From above, and re-place it on the cylinder body cut piece receiving stand 69.

Thereafter, only the carry-out carriage 61 is moved to a position below the cylindrical body 3 that has been lifted. The tubular body cutting piece 60 that has been replaced and placed on the tubular body piece receiving table 69 is moved to the spot or a predetermined place, and then crushed and processed.

Next, in order to use the tower crane 39 for dismantling work of the steel tower 9 to be described later, the gondola 35 is temporarily placed on the cylinder support 67. The gondola fixing jack 44, the wheel 4
7 and water jet nozzle 36 to gondola 3
Retreat towards the center of 5. Then, operate the tower crane 39 to slowly lower the gondola 35,
It is placed on the barrel support 67.

At this time, the center of the gondola 35 and the center of the cylindrical body 3 in the axial direction are kept aligned so that the gondola 35 is not crushed by the cylindrical body 3 that is lowered following this operation. warn.

After confirming that the gondola 35 is completely mounted on the cylindrical support 67, the wire rope 27 is detached from the hook 52 of the tower crane 39 by a worker, and the gondola 35 and the tower crane 39 are removed. Disconnect with. Thus, the work of pulling down the gondola 35 and the work of separating it from the tower crane 39 are completed.

Subsequently, finally, the hydraulic jack 13 is operated, and the cylindrical body 3 is supported by the cylindrical body support device 11 until the lower end 65 of the cylindrical body 3 is placed on the cylindrical body support base 67 of the carry-out carriage 61. , And descend along its axial direction. For this purpose, the opposite operation to the operation for lifting the cylindrical body 3 by the cylindrical body supporting device 11 may be performed.

This will be described in detail. As described above, in a state where the cylindrical body 3 is supported by the cylindrical body support device 11 and is kept lifted, first, only the upper support pin 16 is inserted into the support pin hole 1.
4 and housed inside the hydraulic jack upper end 15. Next, the hydraulic jack 13 is contracted, and the upper end 15 of the hydraulic jack is further lowered to a height at which the upper support pin 16 can be inserted into the lower support pin hole 14. At this position, the hydraulic jack 13 is stopped from being retracted, and the upper support pin 16 is stopped.
From the upper end 15 of the hydraulic jack, and
4 to support the hydraulic jack upper end 15.

The length of contracting the hydraulic jack 13 at this time can be changed to an arbitrary length at any time according to the judgment of the worker on site. For example, the pitch between the adjacent support pin holes 14 may be one pitch or three pitches.

Subsequently, similarly to the hydraulic jack upper end portion 15, the hydraulic jack lower end portion 17 is also lowered. The lower support pin 18 is housed in the lower end 17 of the hydraulic jack and pulled out from the support pin hole 14. Thereafter, the hydraulic jack 13 is extended and the lower end 17 of the hydraulic jack is pulled down while the hydraulic jack 13, the tubular body support device 11, and the scaffold 26 are supported by the upper support pins 16.

At this time, similarly to the above-mentioned case, the extension of the hydraulic jack 13 at the time when the lower end 17 of the hydraulic jack is lowered to the position of the desired support pin hole 14 is determined based on the judgment of the worker at the site. Then, the lower support pin 18 is protruded from the lower end 17 of the hydraulic jack, and is inserted into the support pin hole 14 to support the lower end 17 of the hydraulic jack.

However, unlike the above-described case of lifting the tubular body 3, the scaffold 26 is suspended below the tubular body support device 11 via a wire rope 27. Therefore, when the hydraulic jack lower end portion 17 is lowered, the tubular body support device 11 is lowered while taking care not to cause the scaffold 26 to hit the ground violently.

By repeating the above operations, the tubular body support device 11 and the scaffold 26 are lowered, and the tubular body 3 is placed on the tubular body support base 67 of the unloading vehicle 61. Thus, the operation of lowering the tubular body 3 while supporting the tubular body 3 with the tubular body support device 11 is completed. In addition, the above-mentioned cylinder support device 11,
Similarly to the case where the scaffold 26 is raised, the expansion and contraction operation of the hydraulic jack 13 may be completely opposite to the above description.

First, the hydraulic jack lower end portion 17 and the guide post 1
After releasing the lock state with zero, the hydraulic jack 13 is extended to lower the hydraulic jack lower end portion 17, and is again locked to the guide column 10 at an appropriate height. Next, after releasing the locked state between the hydraulic jack upper end portion 15 and the guide post 10, the hydraulic jack 13 is contracted to lower the hydraulic jack upper end portion 15 and again locked to the guide post 10 at an appropriate height. .

Even if the hydraulic jack 13 is operated in the above sequence to repeat the expansion and contraction operation, the tubular body support device 11 and the scaffold 26 are lowered while the tubular body 3 is supported by the tubular body support device 11. You can go.

Next, the steel tower 9 is dismantled. The dismantling work of the steel tower 9 is performed by a worker at a high place alternately with the cutting work of the tubular body 3. The steel tower 9 is sequentially dismantled from the upper side to the ground side by the same length as the cylindrical body cut piece 60 cut by the cutting operation of the cylindrical body 3.

The components of the steel tower 9 disassembled for each of the main member 6, the horizontal support members 7, and the diagonal members 8 or in a state in which they are further finely cut are used by using a tower crane 39 separated from the gondola 35. , Is carried down from the top of the tower 9 to the ground.

The components disassembled by the hooks 52 may be suspended one by one and transported to the ground, or a carrier (not shown) or a transport net may be suspended on the hooks 52.
The dismantled components of the tower 9 may be collectively stored therein and transported to the ground. Thus, the dismantling work of the steel tower 9 is temporarily ended.

Subsequently, in order to resume the dismantling operation of the tube body 3, the hook 52 of the tower crane 39 is put into the inside of the tube body 3 from the top and pulled down to near the ground. After lowering the hook 52 to near the ground, the lowering of the hook 52 is stopped once, and the wire rope 27 of the gondola 35 removed earlier is hooked on the hook 52 again by a worker.

Thereafter, the operation shifts to the above-described series of dismantling work of the tubular body 3 again.

Thereafter, the above-described dismantling operation may be repeated until the tubular body 3 and the steel tower 9 are completely dismantled. When the tubular body 3 is completely dismantled, the tower-type chimney base 59 is crushed on the spot and treated.

Further, as the tubular body 3 and the tower 9 are dismantled and the height of the entire tower-type chimney 2 decreases, the height of the tower 53 of the tower crane 39 also decreases.
Of course, it is preferable to gradually lower the crane main body 51 to the ground side.

For this purpose, as the tower 9 is dismantled, the fixing member 55 for fixing the tower section 53 to the tower 9 is removed from time to time, and the tower section 53 is lowered as described above. Just do it.

As described above, the dismantling work of disassembling the cylindrical body 3 from the ground side to the top near the ground, and disassembling the steel tower 9 from the top to the ground side by working at high places. According to the dismantling method of the tower-type chimney, in which the dismantling work is repeated alternately and in parallel, the work at high places can be greatly reduced.

Therefore, during the dismantling work of the tower-type chimney 2, the worker can be engaged in the dismantling work in an extremely safe environment. In addition, since many workers do not need to frequently move between the ground and high places, it is possible to significantly reduce the labor required for workers to move up and down, and the burden on high places such as moving time. it can.

The chimney dismantling device 1 and the chimney dismantling method of the present invention are not limited to the first embodiment. For example, while the dismantling work of the tubular body 3 and the dismantling work of the steel tower 9 were performed alternately and in parallel once each, while the tubular body 3 was cut three times continuously, The operation of dismantling the steel tower 9 at a stroke by the length of may be repeated.

Further, the number of the tubular bodies 3 may be one or a plurality of two or three. If the chimney dismantling device 1 of the present invention is installed in each of the cylindrical bodies 3, the cylindrical body 3 is dismantled from the ground side toward the top as in the case of the first embodiment described above. You can go.

[0150]

According to the chimney dismantling method according to the first aspect of the present invention, the chimney body can be dismantled near the ground from the ground side toward the top.

Almost all of the demolition work other than the work of attaching the body supporting device to the chimney body of the chimney by the work at a high place before the start of the chimney demolition work can be performed near the ground. Therefore, work at high places can be significantly reduced, and it becomes easier to ensure the safety of workers during dismantling work.
Further, the dismantling work can be promptly performed.

Also, since it is not necessary to use a hoist whose lease fee is very expensive such as a crawler crane,
The total cost of dismantling work can be kept low.

Further, since a large work space for assembling the crawler crane is not required, the restriction on the possibility of dismantling work depending on the environment around the chimney is largely removed.

According to the chimney dismantling method according to the second aspect of the present invention, the effect obtained when the chimney dismantling method according to the first aspect of the present invention is implemented can of course be obtained. It can also be applied to the dismantling work of steel tower chimneys.

The tubular body of the tower-type chimney is dismantled from the ground side to the top near the ground, and only the tower is dismantled from the top to the ground by working at height. Therefore, it is possible to greatly reduce the burden of a worker who dismantles the cylinder body by climbing to a high place and the time required to carry the dismantled pieces of the cylinder body that have been dismantled to the ground.

In the dismantling work of the tower-type chimney,
It becomes easier to ensure the safety of workers during dismantling work.

According to the method for dismantling a chimney according to the third aspect of the present invention, the effect obtained when the method for dismantling the chimney according to the second aspect of the present invention can be obtained. In addition, even when the cylinder body is moved up and down along the axial direction, the steel tower can continue to be indirectly supported by the steel tower. Therefore, the possibility that the body of the chimney falls down during the dismantling operation can be extremely reduced.

Further, according to the chimney dismantling apparatus according to the fourth aspect of the present invention, by using the apparatus of the present invention, the chimney dismantling method according to the first, second and third aspects can be achieved. Can be implemented.

The chimney dismantling device may be attached to the chimney cylinder by high-altitude work using a tower crane before the chimney dismantling operation is started. After that, almost all demolition work can be performed near the ground.
Therefore, it is easy to ensure the safety of the worker during the dismantling work.

Also, after the dismantling work is completed, the work of removing the chimney dismantling device and the work of removing the chimney are also performed on the ground,
And it can be easily performed near the ground,
Dismantling work can proceed quickly.

Further, according to the chimney dismantling apparatus according to the fifth aspect of the present invention, by using the apparatus of the present invention, the chimney dismantling method according to the first, second and third aspects is achieved. Can be implemented.

In addition, during the transition from the previous cylinder cutting operation to the next cylinder cutting operation, it is possible to easily and quickly perform the operation of removing the cylinder cutting pieces cut from the chimney cylinder. And the time required for dismantling the chimney can be greatly reduced.

Further, it is possible to extremely reduce the possibility that the cut piece of the tubular body falls and rolls, thereby damaging the portion of the chimney dismantling device installed on the ground, and the like.
Workers on the ground can be engaged in demolition work in an extremely safe environment.

According to the chimney dismantling device according to the sixth aspect of the present invention, the tube supporting device provided in the device according to the present invention provides the tube body while supporting the tube body from the outside thereof. It can be moved up and down along the axial direction.

According to the chimney dismantling device according to the seventh aspect of the present invention, the tubular body cutting device provided in the device of the present invention allows the tubular body to be independent from both the inner and outer sides thereof, and The pipe body can be cut along the circumferential direction, and the tubular body can be cut from the ground side toward the top.

[Brief description of the drawings]

FIG. 1A is a perspective view illustrating a state in which a chimney dismantling device according to a first embodiment of the present invention is attached to a cylinder body of a chimney, and FIG. It is a perspective view showing the state which cut | disconnected and took out the part.

FIG. 2 is a front view showing the chimney dismantling device of FIG. 1 (a), and the manner in which the body of the chimney supported by the device moves up and down.

FIG. 3 is a sectional view of the vicinity of the tubular body support device in the state of FIG. 1;

FIG. 4 is a sectional view of the vicinity of the cylinder cutting device in the state of FIG. 1;

FIG. 5 is a cross-sectional view showing a state in which the tube body of the chimney is cut from inside and outside by the tube body cutting device in the state shown in FIG. 4;

FIG. 6 is a cross-sectional view showing the vicinity of the carry-out carriage shown in FIG.

FIG. 7A is a front view showing a state before starting the dismantling work of the tower type chimney by the chimney dismantling method according to the first embodiment of the present invention, and FIG. (A)
FIG. 7 is a front view showing a state at the time when the dismantling work has progressed from the state of FIG.

FIG. 8 is a front view showing a state before starting a dismantling operation of a tower type chimney according to a conventional chimney dismantling method.

[Description of Signs] 1 ... Chimney dismantling device 2 ... Steel tower type chimney (chimney) 3 ... tubular body 4 ... Outer plate (outer wall material) 5 ... Lining (inner wall material) 6 ... Main material (iron tower member) 7 ... Horizontal support Material (steel tower member) 8 ... Slanting material (steel tower member) 9 ... iron tower 10 ... guide pillar 11 ... tube support device 12 ... tube cutting device 24 ... gas type cutting device 25 ... water jet type suspension device 39 ... tower crane 57 ... Roller type guide 60 ... Cut piece of cylinder body 61 ... Unloading car 65 ... Bottom end of cylinder body 66 ... Jack for drop prevention

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshifumi Hayashi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima F-term in Mitsubishi Heavy Industries, Ltd. Hiroshima Works 2E176 AA13 DD61

Claims (7)

[Claims] 1. A dismantling method for dismantling an existing chimney, comprising: a first supporting means for supporting the tubular body of the chimney near the ground by using a tubular body supporting device capable of moving up and down while supporting the tubular body of the chimney. Means, a second means for cutting and removing the tubular body by a predetermined length below the support portion, and a third means for lowering the tubular body by the tubular body support device until the lower end of the tubular body is landed. And fourth means for raising only the cylinder support device and supporting the cylinder again. Thereafter, by repeating the means, the chimney is moved from the ground side to the top of the ground near the ground. A chimney dismantling method characterized by being dismantled toward each other. 2. A disassembly method for dismantling an existing tower-type chimney in which a tubular body is supported by a steel tower from the periphery, a first means for releasing an engagement state between the steel tower and the tubular body, A second means for supporting the tubular body near the ground using a tubular body supporting device capable of moving up and down, and cutting and removing the tubular body by a predetermined length below the support portion A third means for lowering the cylindrical body by the cylindrical body support device until the lower end of the cylindrical body lands, a fifth means for raising only the cylindrical body support device and supporting the cylindrical body again A method of disassembling a chimney, wherein the above-mentioned means is repeated to disassemble the tower-type chimney near the ground from the ground side toward the top. 3. The steel tower is provided with a roller type guide for supporting the cylindrical body so as to be able to move up and down along the axial direction thereof, and guides the elevating operation of the cylindrical body. A method for dismantling a chimney according to item 1. 4. A dismantling device for dismantling an existing tower-type chimney in which a tubular body is supported from the periphery by a tower, wherein the tower members disposed along the tower and sequentially dismantled from the top of the tower are lowered to the ground. A tower crane to be removed, a tube supporting device installed at a lower portion of the tube to support the tube and move up and down; a device installed at a lower portion of the tube to cut the tube by a predetermined length. A chimney dismantling device, comprising: a tube cutting device. 5. A dismantling apparatus for dismantling an existing tower-type chimney in which a tubular body is supported by a tower from the periphery, comprising: A tower crane to be removed, a tube supporting device installed at a lower portion of the tube to support the tube and move up and down; a device installed at a lower portion of the tube to cut the tube by a predetermined length. A tubular body cutting device, a delivery cart carried in and out between the lower end of the tubular body and the ground when the tubular body is cut by the tubular body cutting device, and a lower end of the tubular body installed on the carry-out cart. 5. The chimney dismantling device according to claim 4, further comprising: a fall prevention jack for supporting the cut piece of the tubular body while supporting the cut piece. 6. The tubular body supporting device is supported by guide columns provided along the axial direction of the tubular body in the vicinity of the ground of the tubular body so as to be movable up and down. The chimney dismantling device according to claim 4 or 5, wherein the device can be moved up and down while being supported from outside. 7. The tubular body cutting device is installed outside the tubular body, and is movable up and down along the axial direction of the tubular body.
And, a gas-type cutting device that injects high-pressure gas and cuts the outer wall material of the tubular body along the circumferential direction of the tubular body, and is installed inside the tubular body, along the axial direction of the tubular body. A water jet type suspending device that is capable of moving up and down, and injects a high-pressure water flow to cut the inner wall material attached to the inside of the tubular body along the circumferential direction of the tubular body. The chimney dismantling device according to claim 4 or 5, wherein: