JP4230798B2 - Method of dismantling the chimney inner wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dismantling how chimney inner wall.
[0002]
[Prior art]
In general, a chimney is composed of an outer wall made of concrete and an inner wall formed inside with an air layer therebetween. The inner wall is constructed by stacking refractory bricks.
When dismantling or repairing this type of chimney, it is necessary to dismantle the inner walls that are affected by dioxins.
[0003]
Conventionally, in order to dismantle the inner wall made of the above-mentioned refractory brick, an operator gets on a chair type gondola or scaffold and enters the chimney, and after decontamination with high-pressure water or the like, the brick is broken by a breaker or the like.
In recent years, a device for removing deposits by remote control, which includes a rock drill, a cutting bit, a high-pressure water washing nozzle, etc., instead of a worker has been developed.
[Problems to be solved by the invention]
However, in the case of manual work by the above workers, it is not only dangerous at work in high places but also a painful work in dust. Although protective clothing is worn, harmful substances such as dioxins are present in the deposits. It was very dangerous because it contained substances. Further, in the case of using a remote control device, there is a problem that the device is large and heavy and cannot be disassembled efficiently.
[0005]
The present invention has been made to solve the above-described conventional problems, and the object of the present invention is not only to release workers from dangerous and troublesome work, but also to make them lightweight and compact. possible, also, can respond to changes in the diameter or cross-sectional shape of the chimney, there is no fear that damage to the outer wall is to provide a dismantling how the very small chimney inner wall vibration and noise.
[0006]
[Means for Solving the Problems]
Disassembling method chimney inner wall of the present invention is composed from the inner wall which is provided at a air layer external wall and on the inside, a method of inner wall to dismantle the inner wall of the chimney which is formed by stacking a set of refractory bricks, chimney One of the refractory bricks stacked by a demolition device comprising a cylinder portion provided in the radial direction from the device main body located in the center of the cylinder and a piston rod provided so as to be able to advance and retract from the cylinder portion. A part is pressed to the said air layer side from an inner side, the arch effect of the refractory brick assembled in the periphery is cancelled | released, and the remaining refractory brick of a periphery is disassembled , It is characterized by the above-mentioned. Further, the inner wall is disassembled sequentially from the upper side to the lower side. Further, the inner wall is disassembled sequentially from the bottom toward the top. Still further, the refractory brick pressed and collapsed is prevented from falling into the air layer. Furthermore, two refractory bricks facing each other among the refractory bricks assembled in a circumferential shape are simultaneously pressed. Moreover, several continuous refractory bricks are pressed simultaneously.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, 1 is an outer wall made of reinforced concrete, 2 is an inner wall in which fireproof bricks 2a are stacked, and an air layer 3 is formed therebetween.
[0009]
Reference numeral 4 denotes a dismantling machine, which is provided with an apparatus main body 4a located at the center of the inner wall 2, a cylinder part 4b provided in a radial direction from the apparatus main body 4a, and capable of moving forward and backward from the cylinder part 4b. The piston rod 4c is formed.
[0010]
In this embodiment, the piston rod 4c is expanded and contracted by hydraulic pressure, but may be operated by another fluid such as air pressure. Moreover, although the said piston rod 4c is expanded-contracted in four directions of cross shape, as shown in FIG.1 (C), you may comprise so that it may expand-contract in two linear directions. Furthermore, as shown in FIG. 1 (D), a cylinder portion 4b and a piston rod 4c may be provided on one side of the apparatus main body 4a, and a reaction force receiving member 4d may be provided on the other side.
[0011]
The dismantling machine 4 is suspended by a winch 6 via a wire 5 so as to be lifted and lowered. Reference numeral 7 denotes a dust-blocking lid, on which the winch 6 is installed.
[0012]
Next, a method for disassembling the inner wall by the apparatus of the above embodiment will be described. First, as shown in FIG. 2 (A), the piston rod 4c of the dismantling device 4 is advanced to push the refractory bricks 2a constituting the inner wall 2 toward the air layer 3, and the inner wall 2 is partially destroyed.
[0013]
Since the inner wall 2 is constructed by assembling a large number of refractory bricks 2a in an arch shape, it cannot be removed inward due to the arch effect, but it can be easily removed outward (air layer 3 side) by the piston rod 4c. Can be partially destroyed. As shown in FIG. 1E, a flange 4e may be provided at the tip of the piston rod 4c so as to press a plurality of continuous refractory bricks 2a simultaneously.
[0014]
Next, as shown in FIG. 2 (B), the dismantling device 4 is rotated horizontally at the same position, and the piston rod 4c is directed toward the undestructed inner wall 2 portion.
[0015]
As shown in FIGS. 3A to 3D, a suction cup 8 is provided at the tip of the piston rod 4c, and the block 2a is adsorbed to the suction cup 8 so as to be pulled inward to collapse the inner wall 2. FIG. 4 shows the state of the suction cup 8 in the pushing-in stage of FIG. 2 (A).
[0016]
Subsequently, the winch 6 is operated to lower the dismantling apparatus 4 by one block, the above disassembling procedure is repeated, and the inner wall 2 is disassembled from top to bottom as shown in FIG.
[0017]
What is important when disassembling the inner wall 2 from the top to the bottom is to prevent demolition debris such as the refractory brick 2a that has collapsed from falling into the air layer 3. This is because the dropped refractory bricks 2a, scraps, and the like become obstacles to pushing in the undestructed refractory bricks 2a, and the dismantling cannot practically proceed.
As means for preventing the refractory brick 2a to be destroyed from dropping into the air layer 3, as shown in FIG. 6, a cushion material 9 such as rubber or air cushion is provided on the air layer 3 in addition to the means for drawing in the inside by the suction cup 8. There is a means to insert. As shown in Fig. 6 (A), the cushion material 9 is inserted in a thin state, and as shown in Fig. 6 (B), it is inflated after insertion. As shown in FIG. 6C, as a means for preventing the firebrick 2a from dropping into the air layer 3, the wedge 10 is suspended on the air layer 3 and the firebrick 2a is dropped inside. Good.
[0018]
FIG. 5 (B) shows a method of dismantling the refractory brick 2a of the inner wall 2 from the lower side. In this case, it is not necessary to provide the sucker 8 and the cushion material 9.
[0019]
FIG. 7 shows another embodiment of the dismantling machine of the present invention. By attaching a hook member 11d to the tip of the piston rod 11c, hooking it on the uppermost block 2a, and retracting the piston rod 11c, The block 2a is disassembled by pulling from the broken line state to the solid line state. The dismantling machine 11 may also be configured in a cross shape.
[0020]
In addition, it is also possible to install a small camera at an appropriate location of the dismantling machine 4 and perform work while checking the internal state of the chimney.
[0021]
【The invention's effect】
1) The inner wall contaminated with dioxin can be dismantled safely and easily.
2) The arch effect of the inner wall can be easily destroyed by pressing a part of the refractory brick.
3) Can easily cope with changes in chimney diameter.
4) Since the refractory brick is pressed against the air layer, there is no risk of damaging the outer wall.
5) Very little vibration and noise, and can be applied to chimney demolition in urban areas.
6) The cross-sectional shape of the chimney is not limited to a circle, and can be applied to any shape such as an ellipse or a rectangle.
[Brief description of the drawings]
FIG. 1 is a side end view (A) showing an embodiment of the disassembling apparatus of the present invention and its II cross-sectional view.
FIG. 2 is an explanatory view for sequentially explaining the inner wall dismantling method.
FIG. 3 is an explanatory view of the action of drawing in a refractory brick by a suction cup.
FIG. 4 is an explanatory diagram of a pressing action of a refractory brick by a suction cup.
FIG. 5 is an explanatory diagram showing a procedure for dismantling the inner wall by the dismantling apparatus.
FIG. 6 is an explanatory view showing an embodiment for preventing a fire brick from falling into an air layer.
FIG. 7 is a diagram illustrating the configuration and operation of an embodiment of the dismantling machine of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer wall 2 Inner wall 2a Block 3 Air layer 4 Demolition machine 4a Device main body 4b Cylinder 4c Piston rod 4d Reaction force receiving member 4e Flange 5 Wire 6 Winch 7 Dust blocker 8 Suction cup 9 Cushion material 10 Wedge 11 Demolition machine 11a Device main body 11b Cylinder 11c Piston rod 11d Hook member

Claims (6)

In the method of disassembling the inner wall of the chimney formed by stacking refractory bricks, the inner wall is radiated from an apparatus main body located at the center of the chimney. A part of the refractory bricks pressed from the inside to the air layer side is pressed from the inside by a dismantling device comprising a cylinder part provided in the direction and a piston rod provided so as to be able to advance and retract from the cylinder part. Then, the arch effect of the refractory bricks assembled in a circumferential shape is canceled, and the remaining refractory bricks in the circumferential shape are dismantled. The method for disassembling a chimney inner wall according to claim 1, wherein the inner wall is disassembled sequentially from the top downward. The method for disassembling a chimney inner wall according to claim 1, wherein the inner wall is disassembled sequentially from the bottom upward. The method for disassembling a chimney inner wall according to claim 2, wherein the pressed and collapsed refractory brick is prevented from falling into the air layer. The method for disassembling a chimney inner wall according to claim 1, 2, 3 or 4, wherein two opposing refractory bricks are pressed simultaneously among the refractory bricks assembled in a circumferential shape. The method for disassembling a chimney inner wall according to claim 1, 2, 3, 4, or 5, wherein several consecutive refractory bricks are pressed simultaneously.

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