JP2738894B2 - Device for preventing foreign matter from adhering to pipe inner surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing foreign matter from adhering to the inner surface of a pipe such as an intake pipe of a thermal power plant installed on a shore. It is about.

[0002]

2. Description of the Related Art Marine organisms such as barnacles and mussels adhere to the inner surfaces of intake pipes and the like of thermal power plants installed on shores. If such marine organisms adhere to the inner surface of an intake pipe or the like, it becomes difficult to intake water, which seriously hinders the operation of the thermal power plant.

Therefore, conventionally, marine organisms are prevented from adhering to the inner surface of the intake pipe by means of injecting chlorine or the like into the intake pipe or applying an antifouling paint to the inner surface of the intake pipe. I was However, such a method has an adverse effect on the environment and has a problem in terms of maintenance.

[0004] There is a demand for the development of a device that solves the above-mentioned problems and that prevents biological adhesion to the inner surface of the pipe without adversely affecting the environment. For example, the following device is known. JP-A-62-26158 discloses, as shown in FIG.
A moving device in a fluid, comprising: A traveling vehicle 31 having a plurality of wheels 32 moving in the pipe A in the axial direction thereof, and a propeller rotatably supported by the traveling vehicle 31 via a shaft 33 and rotated by a fluid flow in the pipe A. A worm gear 35 is attached to the tip of the rotating shaft of the propeller 34, a gear 36 meshes with the worm gear 35, and a pulley 37 is attached to the gear 36 coaxially with the gear 36, A belt 39 is wound around a pulley 37 and a pulley 38 mounted on wheels 32 (hereinafter referred to as prior art 1).

According to the apparatus of the prior art 1, the rotation of the propeller 34 due to the flow of the fluid in the pipe A is transmitted to the wheel 32 via the worm gear 35, the gear 36 and the belt 39, and
By the rotation of, the traveling vehicle 31 travels in the pipe A along its axis without requiring external energy. As a result, the propeller 34 of the traveling vehicle 31 traveling in the pipe A increases the flow velocity of the fluid in the pipe A on the inner surface of the pipe, thereby preventing marine organisms from adhering to the inner surface of the pipe.

FIG. 3 disclosed in Japanese Patent Publication No. Hei 3-23236
An apparatus for preventing organisms from adhering to the inner surface of a pipe, comprising: A traveling vehicle 31 having a plurality of wheels 32 moving in the pipe A in the axial direction thereof; a propeller 34 attached to the traveling vehicle 31 and rotated by a flow of fluid in the tube A;
A worm gear 35 is attached to the tip of the rotating shaft of the propeller 34. The worm gear 35 is attached to the tip of the rotating shaft of the propeller 34.
A gear 36 is engaged with the gear 36. A pulley 37 is mounted on the gear 36 coaxially with the gear 36, and a belt 39 is looped between the pulley 37 and a pulley 38 mounted on the wheel 32 (hereinafter, referred to as a pulley 37). Prior art 2).

According to the device of the prior art 2, the rotation of the propeller 44, which is rotated by the flow of the fluid flowing through the pipe A, is transmitted to the wheel 32 via the worm gear 35, the gear 36 and the belt 39 as in the prior art 1. The transmitted and rotated wheels 32 cause the traveling carriage 31 to travel within the pipe A along its axis without requiring external energy. As a result, the inner surface of the tube A is rubbed by the brush 40 attached to the tip of the rotating propeller 34, so that adhesion of marine organisms to the inner surface of the tube is prevented.

[0008]

The above-mentioned prior arts 1 and 2 have the following problems. That is, both
The traveling vehicle rotates the propeller 34 due to the flow of the fluid in the pipe A.
The mechanism for transmitting to the wheels 32 of 31 is a worm gear 35,
Only the gear 36 and the belt 39 wound between the pulley 37 and the pulley 38 are included. Therefore, by propeller 34,
The driving force of the traveling vehicle 31 on the wheels 32 is weak, and it is difficult to make the traveling vehicle 31 travel by overcoming the flow velocity of the fluid in the pipe A in actual operation. Accordingly, the propeller 34 of the traveling vehicle 31 reduces the flow velocity of the fluid in the pipe A on the inner surface of the pipe, or the brush 40 attached to the tip of the propeller 34.
Rubs the inner surface of tube A, which does not prevent the attachment of marine organisms to the inner surface of tube.

Prior art 2 has the following problem. That is, in the curved portion or the deformed portion of the tube A, the brush 40 attached to the tip of the propeller 34 does not contact the inner surface of the tube, and therefore, the attachment of organisms to the inner surface of the curved portion or the deformed portion of the tube. Can not be prevented. Further, the rotational force of the propeller 34 is reduced by friction between the brush 40 and the inner surface of the pipe, and the wear of the brush 40 is large and its life is short.

[0010] Accordingly, an object of the present invention is to solve the above-mentioned problem, and to make a traveling vehicle easily run by overcoming the flow velocity of the fluid by using the rotational force of a propeller rotated by the fluid in the pipe as power. Accordingly, it is an object of the present invention to provide a device capable of speeding up the flow rate of the fluid in the pipe on the inner surface of the pipe, or accurately preventing foreign matter from adhering to the inner surface of the pipe by a brush attached to the traveling vehicle.

[0011]

[0012]

In the apparatus according to the present invention, a propeller is provided at the center of the vehicle body of the traveling vehicle, and the rotation of the propeller is provided at both ends of a rotating shaft provided along the center axis of the traveling vehicle. The transmission of the rotation of the rotating shaft is transmitted to the wheels of the traveling vehicle via the gear mechanism through two clutches so that the driving force of the propeller on the wheels of the traveling vehicle can be reduced. The traveling carriage can travel strongly, overcoming the flow velocity of the fluid in the pipe. Accordingly, the propeller of the traveling vehicle speeds up the flow velocity of the fluid inside the tube on the inner surface of the tube, or rubs the inner surface of the tube with a brush attached to the traveling vehicle, thereby causing foreign matter such as marine organisms to adhere to the inner surface of the tube. Can be properly prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view showing one embodiment of the device of the present invention. As shown in FIG.
Is formed of a vehicle body 2 having a cylindrical cross section, and a concave portion 2a is formed in a central portion of the vehicle body 2 in a circumferential direction. In the recess 2a,
A boss 4 of the propeller 3, which is rotated by the flow of the fluid in the pipe A, is provided rotatably around a core portion 2b of the vehicle body 2 via a bearing.

The core portion 2b of the vehicle body 2 is provided with a through hole 2c along the center axis thereof, and guide tubes 5 are fixed to both ends of the through hole 2c. A horizontal rotating shaft 6 is provided in the vehicle body 2 so as to be rotatable via a bearing along a central axis of the vehicle body 2, through the guide tube 5 and the through hole 2c of the core portion 2b.

Four first gears 7a to 7d are integrally formed on both right and left ends of the propeller boss 4. 1st gear 7a
7d are provided with second gears 8a to 8d meshing therewith, and at the other end of each shaft 9 of the second gears 8a to 8d, third gears 10a to 10d are provided with reduction gears 11a to 11d. Mounted through.

The reduction gears 11a to 11d reduce the rotation of the second gears 8a to 8d by meshing a plurality of gears, and
The transmission is transmitted to the gears 10a to 10d, and the number of gears of one of the speed reducers 11a and 11b is one more than the number of gears of the other speed reducers 11c and 11d. Accordingly, the third gears 10a, 10a, which are transmitted from the second gears 8a, 8b via the speed reducers 11a, 11b on one side.
The rotation direction of 10b and the reduction gear on the other side from the second gears 8c and 8d
The directions of rotation of the third gears 10c, 10d transmitted via 11c, 11d are different from each other.

A first clutch 12 and a second clutch 13 are provided on the guide tube 5 so as to freely rotate through bearings around the guide tube 5, and the third gears 10a and 10b and the first clutch 12 , And between the third gears 10c and 10d and the second clutch 13, a chain 14 is wound around each.

At both ends of the rotating shaft 6, a first moving clutch 15 and a second moving clutch 16 which rotate together with the rotating shaft 6 and can move horizontally along the rotating shaft 6 are provided with a first clutch 12 and a second clutch. 13 is provided so as to be engageable. First bevel gears 17a and 17b are attached to both ends of the rotating shaft 6.

At one end of the vehicle body 2 of the traveling vehicle 1, a drive shaft 20a of one of wheels 19a and 19b rotatably contacting the inner surface of the pipe A is provided in a vertical direction. The other wheel 19c, which also rotatably contacts the inner surface of the pipe A,
A 19d drive shaft 20b is provided in the vertical direction. An upper second bevel gear 18a meshing with the first bevel gear 17a is mounted on one drive shaft 20a, and a lower second bevel gear 18b meshing with the first bevel gear 17b is mounted on the other drive shaft 20b.
Is installed.

The rotation of one drive shaft 20a is caused by rotation of a third bevel gear 21a provided at both ends thereof and a fourth bevel gear 24a provided at the end of a horizontal axle 22 meshing with the third bevel gear 21a. To the axle 22. Therefore, the wheels 19a and 19b provided at both ends of the axle 22 are rotated. The rotation of the other drive shaft 20b is caused by rotation of the third bevel gears provided at both ends thereof.
The power is transmitted to the axle 23 by the first bevel gear 24b provided at the end of the horizontal axle 23 and meshing with the third bevel gear 21b. Therefore, the wheels 19c, 19 provided at both ends of the axle 23
Rotate d.

Reference numeral 25 denotes a horizontally movable clutch switching rod, one end of which protrudes from one end of the vehicle body 2, and the other end protrudes from the other end of the vehicle body 2. A switching piece 26 is provided at an intermediate portion of the switching rod 25, the tip of which is engaged with the grooves of the first moving clutch 15 and the second moving clutch 16.

One end of the clutch switching rod 25 is pressed by a switching rod operating mechanism (not shown), and the first moving clutch 15 is moved by the switching piece 26 to the first clutch 12.
Engages. As a result, if the propeller 3 is, for example, counterclockwise rotated by the water flow in the pipe A, the rotation is the first rotation.
The gears 7a, 7b, the second gears 8a, 8b and one of the speed reducers 11a, 11
b to the third gears 10a, 10b.
Turn 10b counterclockwise.

The rotation of the third gears 10a and 10b is transmitted to the first clutch 12 by a chain 14, and is transmitted to the rotating shaft 6 via a first moving clutch 15 which meshes with the first clutch 12.
Is rotated counterclockwise about its axis. At this time, the rotation directions of the third gears 10c, 10d transmitted via the other-side reduction gears 11c, 11d having different numbers of gears are reversed, but the second clutch 13 rotated by the third gears 10c, 10d is , And idles around the guide tube 5.

The rotation of the rotating shaft 6 is effected by the first bevel gears 17a and 17b provided at both ends and the second bevel gear meshing therewith.
18a, 18b to the drive shafts 20a, 20b.
a, 20b is rotated clockwise. The rotation of the drive shafts 20a, 20b is transmitted to the axles 22, 23 by the third bevel gears 21a, 21b and the fourth bevel gears 24a, 24b meshing with the third bevel gears 21a, 21b.
To the left. Thus, the wheels 19a, 19b, 19c, and 19d provided at both ends of the axles 22 and 23 turn left, and the traveling vehicle 1
It runs in the pipe A.

The other end of the clutch switching rod 25 is pressed by a switching rod operating mechanism (not shown), and the second moving clutch 16 is moved by the switching piece 26 to the second clutch 13.
Engages. As a result, the rotation of the propeller 3
7c, 7d, the second gears 8c, 8d and the other reduction gears 11c, 11d having different numbers of gears are transmitted to the third gears 10c, 10d to rotate the third gears 10c, 10d clockwise.

The rotation of the third gears 10c and 10d is transmitted to the second clutch 13 by a chain 14, and is transmitted to the rotating shaft 6 via a second moving clutch 16 meshing with the second clutch 13.
Is rotated clockwise about its axis. At this time, the rotation direction of the third gears 10a and 10b transmitted via the one-side reduction gears 11a and 11b is reversed, but the third gear
The first clutch 12 rotated by 10a and 10b is
Idling around.

The rotation of the rotating shaft 6 is effected by the first bevel gears 17a and 17b provided at both ends and the second bevel gear meshing therewith.
18a, 18b to the drive shafts 20a, 20b.
a, 20b are rotated counterclockwise. The rotation of the drive shafts 20a, 20b is transmitted to the axles 22, 23 by the third bevel gears 21a, 21b and the fourth bevel gears 24a, 24b meshing with the third bevel gears 21a, 21b.
To the right. Thus, the wheels 19a, 19b, 19c, 19d provided at both ends of the axles 22, 23 rotate rightward, and the traveling vehicle 1
It runs in the pipe A in reverse.

Pressing of the clutch switching rod 25 by a switching rod operating mechanism (not shown) is adjusted, and as shown in FIG. 1, the clutch switching rod 25 is moved by the first moving clutch 15 and the second moving clutch 16 to the first clutch 12. And the intermediate portion which is not engaged with any of the second clutch 13. As a result, the rotation of the propeller 3 is controlled by the wheels 19a to 19
is not transmitted to d, and the traveling vehicle 1 is stopped.

In this way, the traveling vehicle 1 moves back and forth in the pipe A along the axis thereof, and the rotating propeller 3 increases the flow velocity of the fluid in the pipe A on the inner surface of the pipe. As a result, adhesion of foreign matter such as marine organisms to the inner surface of the pipe A is properly prevented in the circumferential direction and the length direction of the pipe A.

Although not shown, the wheels 19a to 19d are mounted at an angle 1 with respect to the axis of the pipe A by a predetermined angle,
Alternatively, a brush that contacts the inner surface of the tube A may be attached via a support arm. With this configuration, the traveling vehicle 1 travels in the pipe A while rotating about the axis thereof. Therefore, the brush attached to the vehicle body 2 always moves inside the pipe A while spirally contacting the inner surface of the pipe A, and the inner surface of the pipe A is rubbed in the circumferential direction and the length direction by the brush. The adhesion of foreign matter such as marine organisms to the inner surface of
Over the circumferential direction and axial direction of the tube A, and also at the curved portion and the deformed portion of the pipe A. Also,
Compared to the case where the brush is attached to the propeller as in the prior art 2, the brush is less worn and the rotational force of the propeller is not reduced by the brush.

[0031]

As described above, according to the present invention,
A propeller is provided at the center of the vehicle body of the traveling vehicle, and the rotation of the propeller can be forward / reversely rotated to a rotating shaft provided along the center axis of the traveling vehicle via two clutches provided at both ends thereof. Transmission, and the rotation of the rotating shaft is transmitted to the wheels of the traveling vehicle via the gear mechanism, so the driving force of the propeller on the wheels of the traveling vehicle is strong, overcoming the flow velocity of the fluid in the pipe. , A traveling cart can be driven. Accordingly, the propeller of the traveling vehicle speeds up the flow velocity of the fluid inside the tube on the inner surface of the tube, or rubs the inner surface of the tube with a brush attached to the traveling vehicle, thereby causing foreign matter such as marine organisms to adhere to the inner surface of the tube. Many industrially useful effects can be brought about, such as prevention of the occurrence of stagnation.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing one embodiment of the device of the present invention.

FIG. 2 is a schematic vertical sectional view of the device of the prior art 1.

FIG. 3 is a schematic vertical sectional view of a device of the prior art 2.

[Explanation of symbols]

 A pipe, 1 trolley, 2 body, 2a recess, 2b core, 2c through hole, 3 propeller, 4 boss, 5 guide tube, 6 rotation shaft, 7a, 7b, 7c, 7d first gear, 8a, 8b, 8c, 8d 2nd gear, 9 axis, 10a, 10b, 10c, 10d 3rd gear, 11a, 11b, 11c, 11d reducer, 12 first clutch, 13 second clutch, 14 chain, 15 first moving clutch, 16 second moving clutch, 17a, 17b first bevel gear, 18a, 18b second bevel gear, 19a, 19b, 19c, 19d wheels, 20a, 20b drive shaft, 21a, 21b third bevel gear, 22,23 axle, 24a, 24b 4th bevel gear, 25 switching rod, 26 switching piece, 31 trolley, 32 wheels, 33 axle, 34 propeller, 35 worm gear, 36 gear, 37 pulley, 38 pulley, 39 belt, 40 brush.

Continued on the front page (72) Inventor Tomoaki Sato 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Koji Ueda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Taketoshi Yoshida 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yuzo Tanaka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan (72) Inventor Yukihiko Okamoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-3-23236 (JP, A) JP-A-52-129183 (JP, A) JP-A-2-209694 (JP, A) JP-A-5-319258 (JP, A) JP-A-62-224798 (JP, A) JP-A-62-224797 (JP, A) Jpn. , U) JP 6-29021 (JP, B2) JP 6-98923 (JP, B2)

Claims (3)

(57) [Claims] 1. A traveling vehicle having a plurality of wheels that moves in a pipe in an axial direction thereof, and a propeller rotatably mounted at a central portion of the traveling vehicle and rotated by a flow of fluid in the pipe. A rotational force transmitting mechanism provided on the traveling vehicle, for transmitting rotation of the propeller to wheels of the traveling vehicle, wherein the rotational force transmitting mechanism extends along a central axis of the traveling vehicle. A rotating shaft, and two clutches provided at both ends of the rotating shaft so as to freely rotate around the rotating shaft, wherein the rotation of the propeller is transmitted in opposite directions by a gear mechanism, At both ends of the rotating shaft, two moving clutches, which rotate with the rotating shaft and are horizontally movable along the rotating shaft, can be engaged with the two clutches, and the two moving clutches. water Said the moved 2
A clutch switching mechanism for transmitting the rotation of the propeller to the rotating shaft in the opposite direction by engaging with one of the two clutches, and a gear mechanism for transmitting the rotation of the rotating shaft to the wheels. A device for preventing foreign matter from adhering to the inner surface of a pipe, comprising: 2. The brush according to claim 1, wherein a brush for contacting the inner surface of the tube and preventing foreign matter from adhering to the inner surface of the tube is attached to the traveling vehicle via a support shaft. apparatus. 3. Each of the plurality of wheels is mounted at a predetermined angle with respect to the axis of the tube,
The apparatus according to claim 1, wherein the traveling carriage is caused to travel in the pipe along the axis while rotating about the axis.