JPH025231Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for dismantling and removing inner wall lining material of a cylinder such as a chimney.

[Conventional technology]

Conventionally, when the inner wall lining material of a cylinder such as a chimney is damaged and the lining material is to be replaced, a frame 12 is placed above the cylinder body 1 of the chimney, for example, as shown in FIG.
A gondola 3 is suspended via a winch 4, a wire rope 5, and a pulley 8, and a worker 7 manually dismantles the lining material 2 with a hammer or the like to expose the cylinder body 1 made of iron skin or the like. let This disassembled material 10 of the lining material 2 is stacked on the base 11 near the outlet of the flue duct 9. Next, the cylindrical body 1 is polished and exposed by side blasting so that a supporting Y anchor (not shown) of the lining material 2 can be welded.

Next, the Y anchor is welded, acid-resistant castable is sprayed, and the gondola 3 is lifted and removed to complete the entire work. For example, for a 150m high chimney, the entire work required 30 days with three shifts of day and night. Of this, 13 days were required to dismantle lining material 2, and 2 days were required for sandblasting, and approximately half of the total work was spent on dismantling lining material 2. Moreover, Worker 7 was working at a high place in an extremely poor environment with dust, noise, and vibration. In addition, this conventional construction method requires a long period of time to dismantle the lining material 2, and therefore has the disadvantage that the chimney repair work takes a long time and interferes with production operations.

[Problem that the invention attempts to solve]

The present invention was proposed to solve the above-mentioned drawbacks, and mainly allows for the dismantling and removal of the lining material of the inner wall of a cylinder, which allows for the dismantling and sandblasting of the lining material of cylinders such as chimneys in a short time. The purpose is to provide equipment.

〔Example〕

Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The flexible shaft 14 is connected to the rotating shaft of the electric motor 13 which is a rotational drive source.
The rotation of the motor is decelerated and transmitted. The rotational drive source is preferably the electric motor 13, but is not limited thereto. This flexible shaft 14 is covered with a protection pipe 14a. The fixed platen 15 is fixed to the main body of the electric motor 13 via this protective pipe 14a. Further, a spindle shaft 23 is fixedly connected to the lower end of the flexible shaft 14. A gear-shaped cutter 18, a cutter arm 18a that supports the cutter 18, and a rotary disk 18b that supports the cutter arm 18a are attached to the lower end of the spindle shaft 23. As shown in FIG. 3, the cutter arm 18a is connected to a rotary disk 18b.
It is connected to the cylinder body 1 by a pin 18c and rotates in accordance with the inner diameter of the cylinder body 1. For this reason, cutting by hammering is facilitated, and cutting can be done in accordance with the size of the inner diameter of the barrel 1. The rotary disk 18b is reinforced by ribs 18d. These form the cutting means for the lining material 2. Note that in this embodiment, the cutter arm 1
8a is connected to the rotary disk 18b by a pin 18c, but may be rotatably fitted. The lower end portion of the cutter 18 is tapered according to the thickness of the lining material 2 to reduce the load on the single cutter 18. Moreover, by installing a plurality of cutters 18, the total amount of work is increased and the working time is shortened. Above this cutting means, a rotary disk 17a on which a plurality of wires 17 are arranged on the circumference is connected to a spindle shaft 23.
is fixed to. These constitute the inner wall polishing means. While rotating, the plugging wire 17 polishes the inner wall of the barrel 1 after being cut by the cutter 18 until the Y anchor can be welded. Furthermore, above it, a centering guide roller 16 is attached to a stationary plate 15 containing a built-in speed reducer so as to rotate in the vertical direction via an arm 16a, and these constitute means for centering the flexible shaft 14 and the spindle shaft 23. do. Centering guide roller arm 16a
expands and contracts in accordance with the size of the inner diameter of the barrel 1. Here, even if the flexible shaft 14 rotates at a reduced speed, the fixed platen 15 is fixed to the main body of the electric motor 13 via the protective pipe 14a, so that it does not rotate in conjunction with the fixed platen 15. Therefore, the reaction force against the cutting action of the cutting means is received by the centering means, and the main body of the electric motor 13 is not rotated by the reaction force against the cutting action. That is, in this embodiment, the main body of the electric motor 13, the protective pipe 14a, the fixed plate 15, and the guide roller 16 are fixed constantly, and the electric motor
3, the flexible shaft 14, the spindle shaft 23, the polishing means such as the wire 17, and the cutting means such as the cutter 18 rotate integrally.

Motor casing 1 for hanging the above means
It is suspended from a hanging hook 21 by a wire 22 via 3a. This hanging hook 21 is suspended by a crane or the like (not shown). These constitute means for suspending the electric motor 13 and the like. Motor drive cable 1
9 connects the electric motor 13 and the power supply, and connects the watering hose 2
0 is connected to a water source (not shown) to sprinkle water. This watering hose 20 serves to prevent dust and cool the cutter 18 and wire 17. The electric motor 13 is provided with an overload protection device (not shown). Television cameras may be installed to monitor this work.

〔motion〕

Next, the operation of this embodiment will be explained with reference to FIG.

The apparatus of this embodiment is suspended by a crane or the like from above the chimney where the lining material 2 is to be dismantled, and is sequentially lowered while cutting the lining material 2 from above.

This cutting action is performed by the cutter 18 being pressed against the surface of the lining material 2 by centrifugal force and continuously hammering and removing while tracing this surface.

At this time, the rotating centering means such as the center guide roller 16 prevents vibration and descends vertically. Dust-proofing and cooling of the cutter 18 and wire 17 are performed by sprinkling water from the watering hose 20.

Next, the inner wall of the barrel 1 is polished by the rotation of the wire 17. After the lining material 2 is lowered to the bottom of the chimney and dismantled, the dismantled object 10 is removed, the Y anchor is welded,
The lining material 2 is installed again and the work is completed.

Although the embodiments applied to chimneys have been described above, the present invention can also be applied to cylindrical pipes, and can also be applied to chimneys or cylindrical pipes that are not upright but recumbent.

[Effect of idea]

As explained above, this invention allows the lining material to be dismantled in a short period of time without the need for workers to enter the cylinder of a chimney or the like.
The inner wall of the cylindrical body can be polished. In addition, since no workers are involved, work can be done safely and the burden on workers in poor environments is eliminated. For this reason, the cylinder repair period is shortened, resulting in the effect of shortening the period during which production and operation are stopped.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is an explanatory diagram of the usage state of the embodiment of Fig. 1, and Fig. 3 is an explanatory diagram of an embodiment of the present invention.
FIG. 4 is an enlarged view of the cutting means constituting the embodiment shown, and is an explanatory view of the conventional dismantling method. 1... cylinder body, 2... lining material, 13... electric motor,
13a...Electric motor casing, 14...Flexible shaft, 14a...Protection pipe, 15...
Fixed plate, 16... Guide roller, 16a... Arm for guide roller, 17... Wire, 17a...
Turning disk, 18...Katsuta, 18a...Katsuta arm, 18b...Turning disk, 18c...Pin, 18d
...Rib, 21...Hook, 22...Wire, 2
3...Spindle shaft.

Claims (1)

[Scope of utility model registration request] a rotary drive source disposed within the cylinder such that the center of the cylinder coincides with the rotational axis, and a flexible shaft connected to the rotational shaft of the rotational drive source to reduce and transmit the rotation of the rotational shaft. a spindle shaft having one end fixed to one end of the flexible shaft; a cutting means for cutting a cylindrical inner wall lining material fixed to the other end of the spindle shaft; and a main body of the rotary drive source for protecting the flexible shaft. a centering means fixed to the flexible shaft through a cover, for centering the flexible shaft and the spindle shaft and receiving a reaction force against the cutting action of the cutting means; and a centering means attached to the flexible shaft between the cutting means and the centering means. and polishing means for polishing the inner wall of the cylinder.