JPH0336673Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a reinforced concrete cutting machine for dismantling reinforced concrete structures.

(Prior art) Conventionally, when dismantling reinforced concrete structures, methods such as attacking with a heavy iron block and dismantling by impact, or using a cutter blade to cut the concrete structure and dismantle it are widely used. It is.

(Problems to be Solved by the Invention) The conventional methods described above have had problems in safely and efficiently dismantling reinforced concrete structures that have been contaminated by radioactivity from a nuclear reactor.

The present invention was proposed in view of the problems of the prior art, and its purpose is to
Another object of the present invention is to provide a reinforced concrete cutting machine that can efficiently and safely cut and dismantle a reinforced concrete structure whose surface is contaminated with radioactive substances without using cooling water.

(Means for Solving the Problems) In order to achieve the above object, the reinforced concrete cutting machine according to the present invention is provided with a cutter disk that rotates around the central axis of the cylindrical cover at the lower end opening surface of the cylindrical cover. At the same time, a seal for preventing the intrusion of cutting dust is interposed between the cutter disk and the cover, a plurality of rotating cutting blades are attached to the lower surface of the cutter disk, and a suction port is provided at the lower end of the outer periphery of the cover. A cylindrical body for suctioning cutting dust is arranged concentrically, and a dustproof seal is arranged around the entire lower edge of the cylindrical shape.

(Operations and effects of the invention) Since the cutting machine according to the invention is configured as described above, it is placed on the surface of a reinforced concrete structure, and the cutter disk is driven and rotated around the central axis of the cylindrical cover. When the rotating cutting blade is driven and rotated, the surface of the reinforced concrete structure is cut by the rotating cutting blade.

A dust-proof seal is provided around the entire lower edge of a cutting dust suction cylindrical body that is arranged concentrically with the outer periphery of the cylindrical cover. Since airtightness is maintained between the two, it is possible to prevent cutting dust from scattering to the outside.

Therefore, by connecting a suction hose to the cutting dust suction cylindrical body, the cutting dust can be suctioned and removed from the suction port at the lower end of the cylindrical body.

In addition, a seal for preventing cutting dust from entering is interposed between the cutter disk and the cylindrical cover, so the seal prevents cutting dust from entering into the cylindrical cover. No damage to mechanical parts. Furthermore, when cutting a reinforced concrete structure whose surface is radioactive or whose surface is contaminated with radioactive materials, the inside of the cylindrical cover is not contaminated with radioactive materials contained in the cutting dust.

As described above, according to the present invention, a reinforced concrete structure that has been activated or whose surface has been contaminated with radioactive materials can be efficiently and safely cut and dismantled without using cooling water.

(Example) The present invention will be described below with reference to the illustrated embodiments.

1 is a cylindrical cover, and a manhole 2 is provided at the top of the cover.

Reference numeral 3 denotes a cutter disk disposed on the lower end opening surface of the cover 1, the rotating shaft 4 of which is disposed along the central axis of the cover 1, and a motor 5 disposed within the cover 1; A seal 8 is provided between the cutter disk 3 and the cover 1 to prevent intrusion of cutting dust. .

Further, a large number of rotary cutting blades 9 are arranged on the lower surface of the cutter disk 3, and are driven and rotated by an electric motor 10 arranged on the upper surface of the cutter disk 3.

A cutting dust suction cylindrical body 11 is disposed concentrically on the outer periphery of the cover 1, and a cutting dust suction port 12 is provided on the lower end surface of the cylindrical body 11. A dustproof seal 13 is disposed around the entire circumference.

The illustrated reinforced concrete cutting machine A is constructed as described above, so that the cutting machine A is attached to the tip of the working arm C of the working vehicle B, and the suction port 14 of the dust suction cylindrical body 11 and the working vehicle B are connected to each other. A suction hose D is connected between the two, and the cutting machine A is brought into contact with the floor E and wall F of the reinforced concrete structure, and the cutter disk 3 is driven and rotated, and the rotary cutting blade 9 is driven and rotated to cut the concrete surface. Cut. At this time, rotating cutting blade 9 Hakatsuta disk 3
The rotary cutting blades 9 are arranged relatively sparsely over the entire circumference of the lower surface of the rotary cutting blade 9, and the center point of the rotary cutting blade 9 is slightly offset in the central part so that the number of rotary cutting blades 9 can be reduced.

The cutting dust thus generated on the surface of the reinforced concrete structure is prevented from entering the cover 1 by the seal 8, and the mechanical parts inside the cover 1 are not damaged by the cutting dust. In addition, when cutting reinforced concrete structures that are radioactive or whose surfaces are contaminated with radioactive materials,
The inside of the cover is not contaminated by radioactive substances contained in cutting dust. Further, the dust-proof seal 13 prevents the dust from scattering around the outer circumference of the cutting machine A.
Cutting dust suction cylindrical body 11 through the suction port 12
is suctioned into the interior and is suctioned through the suction hose D,
The cutting dust is sucked into the cutting dust suction storage G of the worker A, and guided to a processing device (not shown) via a primary filter H and a flexible hose I.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a reinforced concrete cutting machine according to the present invention, FIG. 2 is a view taken along the arrow in FIG. 1, and FIG. 3 is a side view showing the cutting machine in use. . 1...Cylindrical cover, 3...Katsuta disk,
9... Rotating cutting blade, 11... Cutting dust suction cylindrical body, 12... Suction port, 13... Dust-proof seal.

Claims (1)

[Scope of utility model registration request] A cutter disk that rotates around the central axis of the cover is disposed on the opening surface of the lower end of the cylindrical cover, and a seal for preventing the intrusion of cutting dust is interposed between the cutter disk and the cover, and Multiple rotating cutting blades are installed on the underside of the cutter disc,
A reinforced concrete cutting machine characterized in that a cutting dust suction cylindrical body having a suction port at the lower end is arranged concentrically around the outer periphery of the cover, and a dustproof seal is arranged around the entire lower edge of the cylindrical body. .