JPH0889917A - Device for cleaning pipe interior - Google Patents

Abstract

PURPOSE: To effectively clean a pipe interior with extremely simple and inexpensive equipment and also to make handling easy and furthermore to produce saying of labor and shortening of construction period. CONSTITUTION: A disc 3 consisting of a rotor 4 forming a blade having radial through-slits and rotating by flowing water 10 and a ring-shaped scraper 5 fitted to the outer periphery thereof is externally put on a body axis 1 inserted into a pipe to be cleaned 11 along an axis thereof through a bearing 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning apparatus suitable for removing and cleaning marine organisms attached to the inner surface of cooling seawater pipes of various power plants.

[0002]

2. Description of the Related Art Since marine organisms adhere to the inner surface of cooling seawater pipes of various power plants, cleaning work is regularly performed to remove the marine organisms. A diver enters or drains water, and a person comes in to scrape off adhering sea life by hand. Further, as shown in the side view of FIG. 5, a cleaning pig that has been proposed as a mechanical cleaning device has a disc-shaped scraper 13 of a disk shape on the main body shaft 12.
With several tubes attached, the pipe 11
Scrape the inner wall of the pipe as it is washed away. However, divers require special technicians, and long distances are dangerous and impossible. When water is drained by humans, there are few people who suffer from bad odors and stains of marine life and dead shellfish. It takes time and work to drain water. In addition, with the cleaning pig, it is possible to save labor and shorten the construction period by flowing with fluid pressure instead of a person. Not not.

[0003]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is possible to efficiently clean the inside of a pipe with extremely simple and inexpensive equipment, and to easily handle the pipe. It is an object of the present invention to provide an in-pipe cleaning device that is unnecessary and saves labor, and that does not require water draining and can greatly shorten the construction period.

[0004]

To this end, the present invention provides a main body shaft inserted along the axis of a pipe to be cleaned through a bearing,
It is characterized in that a disk composed of a rotating body which forms a blade having a radial through slit and is rotated by running water, and a ring-shaped scraper attached to the outer periphery of the rotating body is externally fitted.

[0005]

In the in-pipe cleaning device of the present invention, when the main shaft is inserted into the pipe to be cleaned along the axis of the pipe, it flows downstream by flowing running water and moves in that direction and the friction resistance between the marine organisms attached to the pipe wall and the scraper. Due to this, as the moving speed decreases, the fluid pressure flowing through the slit acts on the ascending blades to rotate the disk, which causes a spiral movement due to the combination of the movement in the downstream direction and the rotational movement. As a result, the scraper on the outer periphery moves in the same manner to scavenge attached marine life and remove it with running water to clean the inner surface of the pipe.

[0006]

1 is a side view, FIG. 2 is a front view, and FIGS. 3 and 4 are views taken along lines III-III and IV-IV of FIG. 2, respectively. FIG. In the above figure, several discs 3 are attached via a bearing 2 to a main body shaft 1 to be inserted into a pipe 11 in which running water 10 is flowing. Each disk 3 is composed of a rotating body 4 and a ring-shaped scraper 5 around the rotating body 4 so that the rotating body 4 can be swung by the flowing water 10. The rotating body 4 has slits 41 and blades for passing the flowing water 10 radially and inclined with a pipe axis. 42 is formed, a similar slit groove 51 is formed on the outer periphery of the scraper 5 so that the running water 10 can pass through, and the rotary member 4 is replaced by a bolt for replacement when worn.
Attach to. Further, buoyant members 6 are provided on the main body shaft 1 in front of and behind the disc 3 so that the weight in water is almost zero.
The three support legs 8 are arranged rearward toward the upstream side of the device through a flexible universal joint 7 made of rubber or the like for the purpose of stabilizing the device and improving passage through the curved pipe. The guide wheel 9 is attached to the tip.

In such a device, when the device is floated in the pipe 11 by the buoyancy member 6, the device floats on the running water 10 and flows downstream, and due to the movement in that direction and the frictional resistance between the marine life and the scraper 5 attached to the pipe wall. As the moving speed decreases, the fluid pressure flowing through the slit 41 acts on the upstream blades 42 to rotate the disk 3 and causes the disk 3 to spirally move due to the combination of the movement in the downstream direction and the rotational movement. As a result, the scraper 5 on the outer periphery moves in the same manner to remove the adhering marine organisms and remove it with running water passing through the slit groove 51 provided in the same portion to clean the inner peripheral surface of the pipe.

Thus, in this pipe cleaning device, the disk 3 is rotated by the water flow, and the scraper 5 on the outer periphery comes into contact with the inner surface of the pipe to perform the cleaning by the spiral motion.
The inside of the pipe can be efficiently cleaned with extremely simple and inexpensive equipment, and the handling is easy. As a result, divers are not required and labor can be saved. The work period can be shortened.

[0009]

In summary, according to the present invention, a blade having a radial through slit is formed through a bearing on a main body shaft inserted along the axis of a pipe to be cleaned, and the rotor is rotated by running water and attached to the outer periphery thereof. By externally fitting a disc consisting of a ring-shaped scraper, the inside of the pipe can be cleaned efficiently and handled easily with extremely simple and inexpensive equipment, which in turn saves labor by eliminating the need for a diver. The present invention is extremely useful industrially, because an in-pipe cleaning device that does not need to be provided and can greatly shorten the construction period is obtained.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the in-pipe cleaning device of the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a side view of a conventional cleaning pig.

[Explanation of symbols]

 1 Main body shaft 2 Bearing 3 Disc 4 Rotating body 41 Slit 42 Blade 5 Scraper 51 Slit groove 6 Buoyant material 7 Universal joint 8 Support leg 9 Wheel 10 Running water 11 Pipe

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Zengo Aizawa 1-3-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Within Tokyo Electric Power Company (72) Inventor Toshihiko Sonoyama 1-3-3 Uchisaiwai-cho, Chiyoda-ku, Tokyo Within Tokyo Electric Power Company (72) Inventor Masamitsu Muramatsu 1-3-13 Takanawa, Minato-ku, Tokyo Sumio Kowa Takanawa Building Within Toden Kogyo Co., Ltd. (72) Inventor Masahiro Kamiya 1-3-3 Takanawa, Minato-ku, Tokyo No. 13 Sumio Kowa Takanawa Building Toden Kogyo Co., Ltd. (72) Inventor Kenji Akasaka 1-1-1, Wadazakicho, Hyogo-ku, Kobe Sanryo Heavy Industries Co., Ltd.Kobe Shipyard (72) Inventor Hiroshi Shimoyama Takasago, Hyogo Prefecture 2-1-1 Niihama, Arai-machi, Arai-machi, Takasago Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Takashi Fujii 2-1-1 Niihama, Arai-cho, Takasago-shi, Hyogo Heavy industry Takasago Research Institute

Claims (1)

[Claims] 1. A rotor comprising a main body shaft that is inserted along the axis of a pipe to be cleaned and a bearing that has radial through slits formed through a bearing, and is rotated by running water, and a ring-shaped scraper attached to the outer periphery of the rotor. An in-pipe cleaning device characterized in that a disc is fitted outside.