JPH0463945B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The chimney demolition method and demolition device of the present invention are used to dismantle chimneys of thermal power plants, for example.

(Conventional technology) Conventionally, to dismantle a chimney, a scaffold was erected around the chimney, and workers climbed onto the scaffold and broke it with a hammer or hand breaker, or a large crawler clay as shown in Figure 6 was used to demolish the chimney. A mobile crane A such as a large truck crane (not shown) is used to suspend the crusher B from it, and the crusher B is operated by a hydraulic unit D, etc., and the peripheral wall C of the chimney is crimped with the crusher B. They were then crushed and crushed.

(Problem to be solved by the invention) A Among the conventional methods, the former method had the following problems.

(b) Assembling scaffolding is troublesome and has to be broken down manually, resulting in poor work efficiency.
Only a small amount could be crushed in a day.

(b) It required a lot of time and effort, resulting in high costs.

(c) It was extremely dangerous as the work required climbing to high places.

B Among the conventional methods, the latter method had the following problems.

(b) Since mobile crane A is used, there is no need to set up scaffolding, but to prevent the crane from tipping over backwards, the arm angle cannot be greater than 75 degrees. For this reason, a fairly long arm is required to dismantle a tall chimney of 70m to 100m.

(b) If the arm is long, work cannot be done unless there is a large space around the chimney.

(c) The longer the arm, the further the cockpit is from the chimney, making it more difficult to operate crusher B. Moreover, if the arm becomes longer, the crusher B becomes more likely to sway horizontally. This makes it difficult for crusher B to pinch the peripheral wall of the chimney, and in some cases, the crusher hits the chimney when pinching, causing damage to the chimney.
Fragments were scattered around. What's more, the debris could scatter as far as 30 to 40 meters square, making it extremely dangerous.

(d) Even if mobile crane A was used, there was a limit to the length of the arm, so there was a limit to the height of the chimney that could be dismantled.

(e) Although the work efficiency was better than the manual method, it was still possible to crush only about 2 meters a day at most.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, and does not require scaffolding or cranes, requires fewer workers, can dismantle chimneys of any height, and can be dismantled in a narrow space. The purpose is to provide a chimney demolition method and demolition equipment that allow work to be carried out safely and efficiently.

(Means for Solving the Problems) The chimney dismantling method according to claim 1 of the present invention is such that the support 2 provided on the outer periphery of the chimney 1 is raised above the chimney 1 under its own power to support it. The chimney 1 is crushed from the upper end by a crusher 5 attached to the body 2, the crusher 5 is rotated intermittently to crush the chimney in the circumferential direction, and once the chimney is crushed all around, the support 2 is lowered by itself. and stop at the next crushing position,
At that position, the crusher 5 crushes the continuation of the previously crushed part to crush the entire circumference, and then the support 2 is lowered, stopped, and the crusher 5 repeats crushing to move the chimney 1 from above to below. In a method of crushing a chimney in which crushing is performed sequentially, the support 2, the crusher 5
This is a chimney demolition method characterized by using the following structure as shown below.

The support body 2 includes an upper drive body 7 and a lower drive body 8, and the upper drive body 7 includes an upper push part 26 and an upper cylinder 11 that presses it against the outer peripheral surface of the chimney 1 from outside the chimney 1. Each lower drive body 8 is provided with a lower pressing part 27 and a lower cylinder 13 that presses it from the outside of the chimney 1 against the outer peripheral surface of the chimney 1. It should be able to be fixed to and released from the outer peripheral surface of 1.

The upper drive body 7 and the lower drive body 8 are connected by a lifting cylinder 9, and one of the upper drive body 7 and the lower drive body 8 is fixed to the chimney 1, and the other is not fixed to the chimney 1. When the cylinder 9 is extended or tightened, the unfixed upper stage driver 7 or lower stage driver 8 moves up or down along the chimney 1.

A rotary drive body 3 is provided above the support body 2,
A rotary body 4 for rotating the chimney 1 in the circumferential direction thereof is rotatably attached to the rotary drive body 3, and a crusher 5 is provided on the rotary body 4.

The crusher 5 crushes the chimney 1 by pinching it from the outside and the inside with two switches 5a and 5b which are opened and closed by an opening and closing cylinder.

A worker riding on the support 2 drives the anchor 28 into the chimney 1 when the support 2 is raised, and the upper pressing part 26 and the lower pressing part 27 are supported by the anchor 28 when the support 2 is raised and lowered. What I tried to do.

In the chimney dismantling device according to claim 2 of the present invention, the support body 2 disposed around the outer periphery of the chimney 1 is
As shown in FIGS. 1 and 2, inside a ring-shaped frame 22 surrounding the outer periphery of the chimney 1, there are two or more upper drive bodies 7 that can be fixed to and released from the outer circumference of the chimney 1 as shown in FIG. The upper stage driver 7 includes an upper stage pressing part 26 and an upper stage cylinder 11 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1, and the lower stage driver 8 has a lower stage pressing part 26. 27 and a lower cylinder 13 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1.
and the lower drive body 8 are connected vertically by a telescopic lifting cylinder 9, and one of the upper drive body 7 and the lower drive body 8 is fixed to the chimney 1, and the other is not fixed to the chimney 1. When the support 9 is extended or retracted, the upper driver 7 or the lower driver 8, which is not fixed, rises or descends along the chimney 1, and a rotary driver 3 is provided above the support 2. A rotary body 4 that rotates in the circumferential direction of the chimney 1 is rotatably attached to the rotary drive body 3, and a rotary body 4 that is opened and closed by an opening/closing cylinder is attached to the rotary body 4.
A crusher 5 is provided which crushes the chimney 1 by pinching it from the outside and inside using two switches 5a and 5b.

In the chimney dismantling device according to claim 3 of the present invention, the support body 2 disposed around the outer periphery of the chimney 1 is
As shown in FIG. 5, two or more workbenches 31 each having an upper drive body 7 and two or more crawling platforms 30 each having a lower drive body 8 are arranged in the circumferential direction of the chimney 1. 7 is an upper stage pressing part 26 and an upper stage cylinder 1 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1;
1, the upper pressing part 26 is fixed to and released from the outer circumference of the chimney 1, and the lower driving body 8 presses the lower pressing part 27 against the outer peripheral surface of the chimney 1 from the outside of the chimney 1. A lower cylinder 13 is provided,
The lower pressing part 27 is fixed to the outer periphery of the chimney 1 and can be released freely.
If one of the lower drive bodies 8 is fixed to the chimney 1 and the other is not fixed to the chimney 1, and the lifting cylinder 9 is extended or retracted, the upper drive body 7 or the lower drive body 8 which is not fixed will move to the chimney 1. The work platform 31 and the crawling platform 30 rise or fall along the
The rotary drive body 3 is provided above the support body 2, and the rotary drive body 3 is thereby moved up or down.
A crusher which crushes a chimney 1 by pinching it from the outside and inside with two openers 5a and 5b which are opened and closed by an opening/closing cylinder, and which is rotatably attached to a rotary body 4 that rotates in the circumferential direction of the rotary body 4. 5.

(Example) In FIGS. 1 to 5 showing examples of the chimney demolition method and demolition apparatus of the present invention, 1 is a chimney and 2 is a support. As shown in FIGS. 1 and 2, the support 2 is formed of a steel material into a ring shape so as to surround the outer periphery of the chimney 1, and the outer periphery and floor are covered with expanded metal (not shown). Inside the frame 22, there are two or more upper drive bodies 7 (Figs. 3 and 5) and two or more lower drive bodies 8 (Figs. 3 and 5), which are fixed and releasable to the outer periphery of the chimney 1. It will be set up. The upper drive body 7 and the lower drive body 8 are vertically connected by a telescopic lifting cylinder 9.

A worker can ride inside the frame 22.

The upper stage driver 7 in FIG. 3 is composed of an upper stage pressing part 26 that is pressed against the outer periphery of the chimney 1, an upper stage arm 10, and an upper stage cylinder 11 that rotates the upper stage arm 10. It is composed of a lower pressing part 27 that is pressed against the outer periphery of the chimney 1, a lower arm 12, and a lower cylinder 13 that rotates the lower arm 12.

The upper arm 10 in FIG. 3 is attached to the frame 22 of the support body 2 so as to be able to swing freely in the vertical direction, and the upper stage pressing part 26 is connected to the tip thereof.
The cylinder tube 15 is attached to the support body 2.
It is attached to the frame 22 of. As a result, when the rod 14 is expanded and contracted left and right, the upper arm 1
0 is swung vertically and when extended, the upper pressing part 26 is pushed from the outside to the outer periphery of the chimney 1 and fixed, and when the rod 14 is retracted, the upper pressing part 26
is arranged to be away from the outer periphery of the chimney 1.

As clearly shown in FIG. 4, the lower arm 12 in FIG. A lower pressing portion 27 is connected, a rod 18 of the lower cylinder 13 is attached to the lower arm 12, and a cylinder tube 19 is fixed to the elevating cylinder 17. As a result, when the rod 18 is extended or contracted, the lower arm 12 is swung vertically, and when the rod 18 is extended, the lower pressing part 27 is pushed from the outside to the outer periphery of the chimney 1 and fixed, and when the rod 18 is retracted, the lower pressing part 27 is 27 is separated from the outer periphery of the chimney 1.

A hydraulic cylinder is used as the lifting cylinder 9 in FIG. 3, and as shown in FIG.
The cylinder tube 21 is attached to the frame 22 of the support body 2. As a result, when the rod 20 is expanded or contracted, the elevating cylinder 17 moves up and down along the guide rail 16.

FIG. 5 shows another embodiment of the chimney dismantling apparatus according to the present invention. This connects the frame 22 of the support body 2 to the upper box-shaped workbench 31,
Two or more work platforms 31 are placed at the same height around the chimney 1, and two or more work platforms 30 are placed at the same height around the chimney 1. With the above arrangement, the upper drive body 7 is provided in the workbench 31, the lower drive body 8 is provided in the crawling platform 30, and the workbench 31 and the crawling platform 30 are connected by a lifting cylinder 9.

A worker may be able to ride on the crawling platform 30 and work platform 31, but if the worker cannot ride on it, a gondola may be hung below it so that the worker can ride on it. Good.

The upper drive body 7 and the lower drive body 8 in FIG. 5 are formed similarly to those in FIG. 3. That is,
The upper stage driving body 7 is composed of an upper stage pressing part 26 that is pressed against the outer periphery of the chimney 1, an upper stage arm 10, and an upper stage cylinder 11 that rotates the upper stage arm 10.
The lower stage drive body 8 is composed of a lower stage pressing part 27 that is pressed against the outer periphery of the chimney 1, a lower stage arm 12, and a lower stage cylinder 13 that rotates the lower stage arm 12.

The upper arm 10 in FIG. 5 is attached to the workbench 31 by a support pin 41 so as to be able to freely swing in the vertical direction, and the upper arm 10 is connected to the tip of the upper arm 10 to the workbench 31. The cylinder tube 15 of the upper cylinder 11 is attached to a workbench 31, and the rod 14 is attached to the tip of the arm 10.
As a result, when the rod 14 is extended and contracted from side to side, the upper stage arm 10 is swung vertically, and when the rod 14 is extended, the upper stage driving body 26 is pressed against the outer periphery of the chimney 1 from the outside and fixed, and when the rod 14 is retracted, the upper stage arm 10 is swung vertically. The part 26 is separated from the outer peripheral surface of the chimney 1.

The lower arm 12 is attached to the crawling stand 30 by a support pin 38 so as to be able to swing freely in the vertical direction, and the lower arm 12 is connected to the tip of the lower arm 12 with a lower pressing portion 27. The lower cylinder 13 is a cylinder tube 19
is attached to the crawling stand 30, and a rod 18 is attached to the tip side of the lower arm 12. As a result, when the rod 18 is expanded and contracted left and right, the lower arm 12
is swung in the vertical direction, and when it is extended, the lower pressing part 27 is pressed and fixed from the outside against the outer circumference of the chimney 1, and when the rod 18 is retracted, the upper pressing part 27 is separated from the outer peripheral surface of the chimney 1. It's like this.

A hydraulic cylinder is also used for the lifting cylinder 9 in FIG. As a result, if one of the crawling platform 30 and the work platform 31 is fixed to the outer periphery of the chimney 1 and the other is not fixed to the chimney 1 and the lifting cylinder 9 is extended or retracted, the unfixed crawling platform 30 or workbench 3
1 is made to rise or fall.

A guide roller 43 is attached to the inside of the workbench 31 (on the chimney 1 side) in FIG. This is always pressed against the outer circumferential surface of the chimney 1 by a spring 44 to prevent the workbench 31 from rolling.

The four columns 6 in FIG. 1 are the frame 2 of the support 2.
The upper parts of the two opposing pillars 6 are connected by a reinforcing connector 24.

The rotary drive body 3 in FIG. 1 is attached below the reinforcing connector 24, and is composed of a motor, a ring-shaped gear, etc. (not shown).

The rotating body 4 shown in FIG. 1 is attached under the rotary drive body 3 so that it can be rotated by the rotary drive body 3.

The crusher 5 shown in FIG.
A and 5b are opened and closed using a hydraulic cylinder (not shown) to compress and crush the peripheral wall. The crusher 5 is suspended from the rotating body 4 and is movable along the rotating body 4 by means of an electric hoist, a hydraulic hoist, a manual hoist, a pneumatic hoist, etc. (not shown).

The one shown in FIG. 2 is basically the same as the one shown in FIG. 1, except that the rotary drive body 3 is ring-shaped and the rotary body 4 is rotatably attached to it.

(Operation of the Invention) To dismantle a chimney using the dismantling method of the present invention and the dismantling apparatus shown in FIG. 3, for example, the following procedure is performed.

A: First, the support 2 is raised from the ground to the tip of the chimney 1. At this time, if the two columns 6 are connected with the reinforcing connector 24 or the rotating body 4 is attached, the reinforcing connector 24 and the rotating body 4 get in the way, making it impossible to raise the support 2 along the chimney 1. For this reason, support 2
When raising the chimney, remove the reinforcing connector 24 and rotating body 4 from the support column 6, then raise the support 2, and after the support 2 has risen to the top of the chimney 1, suspend them using a winch or the like. Pillar 6
Attach to.

B. To raise the support 2 from the ground along the chimney 1, proceed as follows.

(1) As shown in Figures 1 and 2, the upper arm 10 of the support 2 provided on the outside of the chimney 1 (Figure 3)
and the lower arm 12 (Fig. 3) are pushed by the upper rod 14 of the upper cylinder 11 and the lower rod 18 of the lower cylinder 13, and the upper and lower pressing parts 26 and 26 of the ends of the respective arms 10 and 12 are pressed. 27 is pressed against the outer periphery of the chimney 1 from the outside, and its upper and lower pressing parts 26 and 27 are driven into the chimney 1.
When the frame 22 of the support body 2 is raised, a worker on the frame 22 of the support body 2 drives it into place. As a result, the plurality of upper pressing parts 26 and lower pressing parts 27 attached at appropriate intervals in the circumferential direction of the support body 2 sandwich the chimney 1, and the support body 2
Fixed.

(2) Next, the rod 18 of the lower cylinder 13 is retracted to separate the lower arm 12 from the outer peripheral surface of the chimney 1, and then the rod 20 of the lifting cylinder 9 is retracted.
The lower driving body 8 is pulled up by retracting the lifting cylinder 17 (FIGS. 3 and 4) and pulling it up along the guide rail 16.

(3) After that, the rod 18 of the lower cylinder 13
, and push the lower arm 12 , press the lower pressing part 27 at the tip of the lower arm 12 against the outer periphery of the chimney 1 , lock it with the anchor 28 driven into the chimney 1 , and move the lower drive body 8 into the chimney 1 . Fix it around the outside.

(4) Next, the rod 14 of the upper cylinder 11 is retracted and the upper arm 10 is pulled upward to release the upper pressing part 26 at the tip of the upper arm 10 from the outer periphery of the chimney 1, and then the lifting cylinder Extend the rod 20 of 9 to push up the frame 22 of the support 2, thereby lifting the support 2.
push up.

(5) After that, extend the rod 14 of the upper cylinder 11, press the upper pressing part 26 at the tip of the upper arm 10 against the outer periphery of the chimney 1, and lock it with the anchor 28, so that the support 2 is attached to the outer periphery of the chimney. Fix it.

(6) Thereafter, the operations (2) to (5) are repeated to intermittently raise the support 2 along the outer wall of the chimney 1.

When the support body 2 rises to the upper end of the chimney 1, the two pillars 6 are connected by the reinforcing connector 24 as shown in FIG. 1, and the rotating body 4 is made to protrude above the chimney 1.

C Next, the chimney 1 is crushed sequentially from the top. For example, this work is performed as follows.

(1) Rotate the rotating body 4 to move the crusher 5 along the circumferential direction of the chimney 1, and move the crusher 5 to the chimney 1.
Set it in the specified position above. In this state, the crusher 5 is lowered and the upper end of the chimney 1 is sandwiched between the inside and the outside with its switches 5a and 5b as shown in Fig. 1, and the switches 5a and 5b are opened and closed using cylinders not shown. Then, the chimney 1 is crimped and crushed.

(2) Rotate the rotary body 4 that has crushed a part of the upper end of the chimney 1, rotate the crusher 5 by a predetermined distance in the circumferential direction of the chimney 1, and stop, and at that stop position, the crusher 5 is crushed first. The horizontal portion is crushed by a crusher 5.

Thereafter, in the same manner, the crusher 5 is intermittently rotated in the circumferential direction of the chimney 1, and the portions next to the previously crushed portion are successively crushed, thereby crushing the entire circumference of the chimney 1. After crushing the entire circumference, the support 2 is lowered by a desired distance in the following manner.

(3) After retracting the lower rod 18 to separate the lower arm 12 from the outer peripheral surface of the chimney, the rod 20 of the lifting cylinder 9 is extended to push the lifting cylinder 17 down along the guide rail 16.

(4) Next, extend the lower rod 18 to press the lower pressing part 27 of the lower arm 12 against the outer peripheral surface of the chimney 1 and lock it to the anchor 28,
Fix it to the same outer peripheral surface.

(5) Next, retract the upper rod 14 to separate the upper arm 10 from the outer peripheral surface of the chimney 1. In this state, the rod 20 of the lifting cylinder 9 is retracted to pull down the frame 22 of the support 2, thereby lowering the support 2.

(6) At the lowered position, extend the upper rod 14 and press the upper pressing part 26 of the upper arm 10 against the outer periphery of the chimney 1, and lock it to the anchor 28 to fix it to the outer periphery.

(7) In this state, operate in the same manner as in (1) and (2) above to crush the portion that was previously crushed over the entire circumference of the chimney 1.

Once the entire circumference has been crushed, perform the operations (3) to (6) above to lower the support 2 intermittently, and then crush the chimney 1 in order from the top using the operations (1) and (2) above. .

Note that when the support body 2 is fixed to the chimney 1, the weight of the support body 2 is applied downward to the upper arm 10 and the lower arm 12, but in this case,
Upper pressing portion 26 of each arm 10, 12,
Since the lower pressing portion 27 is supported by the anchor 28, this downward weight becomes a force that pushes each arm 10, 12 in the lateral direction (towards the chimney). Therefore, the upper pressing part 26 and the lower pressing part 27, which are pressed against the chimney 1 by the upper cylinder 11 and the lower cylinder 13, are pressed against the chimney 1 by their own weight, and clamp the chimney 1 even more firmly. Thus, the support body 2 is securely fixed to the chimney.

The lifting and lowering operations of the support 2 and the opening and closing operations of the crusher 5 are controlled from the ground or by a worker riding on a gondola or the support 2.

D The case of crushing the chimney 1 using the support body 2 shown in Fig. 5 is almost the same as the case of crushing the chimney 1 using the support body 2 of Fig. 3 described above, and the difference is that the support body 2 Only the climbing platform 30 and the work platform 31 of No. 2 are raised and lowered. Therefore, the elevating and lowering of the crawling platform 30 and the work platform 31 will be explained next.

(a) Lower arm 12 of the crawling platform 30 and workbench 31
The upper arm 10 is connected to the rod 18 of the lower cylinder 13 and the rod 14 of the upper cylinder 11, respectively.
The upper pressing part 26 and the lower pressing part 27 attached to the tips of the rods 18 and 14 are pressed against the outer periphery of the chimney 1 and are locked to the anchor 28. As a result, the crawling platform 30 and the workbench 31 on the outside of the chimney 1 are fixed to the chimney 1.

(b) Next, the rod 14 of the upper cylinder 11 of the workbench 31 is retracted to separate the upper arm 10 from the outer periphery of the chimney 1, and then the rod 20 of the lifting cylinder 9 is extended to push the workbench 31 up.

(c) Extend the rod 14 of the upper cylinder 11 of the workbench 31 that has been pushed up, press the upper arm 10 of the workbench 31 against the outer periphery of the chimney 1, and lock it to the anchor 28 to move the workbench 31 to the outer periphery of the chimney 1. Fixed to.

(d) Next, the rod 18 of the lower cylinder 13 of the crawler 30 is retracted to separate the lower arm 12 from the outer periphery of the chimney 1.

(e) Retract the rod 20 of the lifting cylinder 9 and pull up the crawling platform 30.

By repeating the above operations A to E, the crawling platform 30 and the work platform 31 are alternately raised, and the support body 2 is raised.

To lower the support 2 shown in FIG. 5 along the chimney 1, proceed as follows.

(a) Rod 18 of the lower cylinder 13 of the crawling platform 30
Contract the lower arm 12 to separate it from the outer periphery of the chimney 1, and in this state, tighten the rod 20 of the lifting cylinder 9.
extend and lower the crawling platform 30.

(b) Extend the rod 18 of the lower cylinder 13 of the lowered crawling platform 30 and remove the lower arm 1 of the crawling platform 30.
The lower pressing part 27 of No. 2 is engaged with the anchor 28 and closely fixed to the outer periphery of the chimney 1.

(C) Next, the rod 14 of the upper cylinder 11 of the workbench 31 is retracted to separate the upper arm 10 of the workbench 31 from the outer periphery of the chimney 1. In this state, the rod 20 of the lifting cylinder 9 is retracted to lower the work platform 31.

(d) At the lowered position, remove the rod 1 of the upper cylinder 11.
4 is extended to press the upper pressing part 26 of the upper arm 10 of the workbench 31 against the outer periphery of the chimney 1 and to lock it to the anchor 28 to fix it to the outer periphery of the chimney 1.

By repeating the above operations A to D, the crawling platform 30 and the work platform 31 are alternately lowered, and the support body 2 is lowered.

(Effects of the Invention) The chimney demolition method and demolition device of the present invention have the following various effects.

(1) The demolition method of the present invention is very convenient because only two people, the person who drives the anchor 28 and the person who operates the crusher 5, hydraulic cylinder, etc., can carry out the demolition work, and the cost and labor are significantly reduced. will be reduced to

(2) Since the support body 2 moves up and down by itself, there is no need for a scaffold or a mobile crane, and there is no need for any labor or trouble in assembling the scaffold. This improves work efficiency and reduces costs.

(3) Since the support body 2 moves up and down by itself, it can go up and down any tall chimney, and there is no limit to the height that can be constructed.

(4) Since a mobile crane is not used, a large space around the chimney is not required.

(5) Compared to the case using a mobile crane, the crusher5
Since the crusher 5 does not sway horizontally, it becomes easier to set the crusher 5 on the chimney. Therefore, when the crusher 5 is set on the chimney 1, there is no chance of it colliding with the chimney and pieces of the chimney scattering in all directions, so it is safe.

(6) Place the upper drive body 7 and the lower drive body 8 on the crawling platform 30.
Since the workbench 31 and the work table 31 are connected by a telescopic lifting cylinder 9, the structure of the lifting mechanism is simple, and even if the support body 2 is provided outside the chimney 1, it does not take up much space.

(7) The crusher 5 attached to the rotating body 4 is rotated in the circumferential direction of the chimney 1 by the rotary drive body 3 provided above the support 2, and the chimney 1 is crushed in the circumferential direction by the crusher 5. I can do it. Furthermore, the structure is simple and practical use is easy.

(8) Since the crusher 5 crushes the chimney 1 by pinching it from the outside and inside and crushing it with the two openings 5a and 5b that are opened and closed by the opening and closing cylinder, when cutting with a knife There is no noise or scattering of powder, and it can be crushed quietly, and the powder is not easily scattered. Additionally, when cutting with a knife, the cut pieces must be lifted up and removed using a hoist, which poses problems such as the hassle of installing a hoist in a narrow space and the increased equipment costs associated with the need for a hoist. However, in the present invention, the crushed pieces fall automatically, so there is no such trouble or problem. Furthermore, when cutting with a knife, the chimney must be cut both vertically and horizontally, making the cutting process cumbersome.
Further, although it is necessary to align the cutter to the cutting location, the crusher 5 of the present invention does not require such trouble.

(9) Since the crusher 5 crushes the chimney 1 by pinching it from the outside and inside and crushing it with two switches 5a and 5b that are opened and closed by an opening/closing cylinder, the switches 5a, 5b
If the chimney can be opened and closed to the extent that it can sandwich the chimney, the chimney can be crushed even if it cannot be opened and closed any wider, so a large space for opening and closing the switches 5a and 5b is not required and it can be used even in a narrow place. By the way, the method of installing a cylinder outside the chimney and extending the rod to press the chimney to crush it requires enough space to install the cylinder outside the chimney.

(10) If a cylinder is installed inside the chimney, the rod is stretched out, and a hammer head attached to the tip of the rod is used to push the chimney from the inside to the outside. Since it will scatter, if you let it fall, there is a risk that it will hit the chimney and workers or machinery below.
Very dangerous. Moreover, if you leave the fallen debris as it is, it will hinder the work around the chimney, so you have to clean it up before it hits too much, and cleaning up is a hassle.
In the present invention, the pieces of the chimney that have been crushed by being pinched between the switches 5a and 5b can be transported to the inside of the chimney while being held and dropped into the inside of the chimney.
There is no danger of falling outside the chimney, and there is no hassle of having to clean up every piece of fallen debris.

(11) Install a cylinder inside or outside the chimney,
The method of stretching the rod and pushing the chimney from the inside to the outside to destroy it cannot be destroyed unless the pressing force is strong, so a powerful cylinder is required, making the cylinder large and expensive, but this is not possible. In the invention, the stretching force of the cylinder is converted into the pinching force (opening/closing force) of the two opening/closing members 5a and 5b and used, so even a small and inexpensive cylinder can provide a powerful crushing force.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing one embodiment of the dismantling device of the present invention attached to a chimney, Fig. 2 is a schematic explanatory diagram showing another example of the dismantling device, and Fig. 3 is a schematic explanatory diagram showing another example of the dismantling device of the present invention. FIG. 4 is an explanatory diagram showing the relationship between the elevating body and the guide rail in the demolition device of the present invention, and FIG. FIG. 6 is an explanatory diagram of the conventional demolition method. 1 is a chimney, 2 is a support body, 3 is a rotary drive body, 4 is a rotary body, 5 is a crusher, 5a, 5b are switches, 6 is a column, 7 is an upper drive body, 8 is a lower drive body, 9 is a Cylinder for lifting, 11 is an upper stage cylinder, 13 is a lower stage cylinder, 26 is an upper stage pressing part, 27 is a lower stage pressing part, 28 is an anchor.

Claims (1)

[Claims] 1. A support 2 provided on the outer periphery of a chimney 1 is raised above the chimney 1 under its own power, and a crusher 5 attached to the support 2 crushes the chimney 1 from the upper end. The crusher 5 is rotated intermittently to crush the chimney in the circumferential direction, and once the entire circumference has been crushed, the support 2 is lowered by itself and stopped at the next crushing position, where the crusher 5 crushes the chimney. Chimney crushing in which the continuation of the crushed part is crushed to crush the entire circumference, and then the lowering of the support 2, stopping, and crushing by the crusher 5 are repeated to sequentially crush the chimney 1 from the top to the bottom. A chimney demolition method characterized in that the support 2 and the crusher 5 have the following configurations, and are used in the following manner. The support body 2 includes an upper drive body 7 and a lower drive body 8, and the upper drive body 7 includes an upper push part 26 and an upper cylinder 11 that presses it against the outer peripheral surface of the chimney 1 from outside the chimney 1. Each lower drive body 8 is provided with a lower pressing part 27 and a lower cylinder 13 that presses it from the outside of the chimney 1 against the outer peripheral surface of the chimney 1. It should be able to be fixed to and released from the outer peripheral surface of 1. The upper drive body 7 and the lower drive body 8 are connected by a lifting cylinder 9, and one of the upper drive body 7 and the lower drive body 8 is fixed to the chimney 1, and the other is not fixed to the chimney 1. When the cylinder 9 is extended or retracted, the unfixed upper stage driver 7 or lower stage driver 8 moves up or down along the chimney 1. A rotary drive body 3 is provided above the support body 2,
A rotary body 4 for rotating the chimney 1 in the circumferential direction thereof is rotatably attached to the rotary drive body 3, and a crusher 5 is provided on the rotary body 4. The crusher 5 crushes the chimney 1 by pinching it from the outside and the inside with two switches 5a and 5b which are opened and closed by an opening and closing cylinder. A worker riding on the support 2 drives the anchor 28 into the chimney 1 when the support 2 is raised, and the upper pressing part 26 and the lower pressing part 27 are supported by the anchor 28 when the support 2 is raised and lowered. What I tried to do. 2. A support 2 disposed on the outer periphery of the chimney 1 has two or more upper drive bodies 7 fixed to the outer periphery of the chimney 1 and two or more lower drive bodies inside a ring-shaped frame 22 surrounding the outer periphery of the chimney 1. The upper driving body 7 includes an upper pressing part 26 and an upper cylinder 11 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1, and the lower driving body 8 has a lower pressing part 26. It comprises a part 27 and a lower cylinder 13 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1, and the upper drive body 7 and the lower drive body 8 are vertically connected by a telescopic lifting cylinder 9. If one of the upper drive body 7 and the lower drive body 8 is fixed to the chimney 1 and the other is not fixed to the chimney 1, and the lifting cylinder 9 is extended or retracted, the upper drive body 7 or the lower drive body which is not fixed will be damaged. A rotary drive body 3 is provided above the support body 2 so that the body 8 rises or descends along the chimney 1, and the rotary drive body 3 rotates the rotary body 4 which is rotated in the circumferential direction of the chimney 1. A chimney which can be freely attached to the rotating body 4 and is equipped with a crusher 5 which crushes the chimney 1 by pinching it from the outside and the side using two switches 5a and 5b which are opened and closed by an opening/closing cylinder. Demolition equipment. 3 The support body 2 arranged on the outer periphery of the chimney 1 supports two or more work platforms 31 equipped with the upper drive body 7 and two or more crawling platforms 30 equipped with the lower drive body 8 in the circumferential direction of the chimney 1. The upper driving body 7 includes an upper pressing part 26 and an upper cylinder 11 that presses the upper pressing part 26 against the outer circumferential surface of the chimney 1 from the outside of the chimney 1. The lower drive body 8 includes a lower pressing part 27 and a lower cylinder 13 that presses it against the outer peripheral surface of the chimney 1 from the outside of the chimney 1. A cylinder 9 for lifting and lowering the work table 31 and the crawling table 30 is provided on the outer periphery and can be fixed and released.
If one of the upper drive body 7 and the lower drive body 8 is fixed to the chimney 1 and the other is not fixed to the chimney 1, and the lifting cylinder 9 is extended or retracted, the upper drive body is not fixed. 7 or the lower drive body 8 rises or descends along the chimney 1, and accordingly the work platform 31 and the crawling platform 30 also rise or fall, and the rotary drive body 3 is provided above the support body 2,
A rotating body 4 that rotates in the circumferential direction of the chimney 1 is rotatably attached to the rotary drive body 3, and two switches 5a and 5b that are opened and closed by an opening/closing cylinder are connected to the outside of the chimney 1. This chimney demolition device is characterized by being equipped with a crusher 5 that crushes the chimney by pinching it from the side.