JP2738895B2 - 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 of the present invention, the traveling bogie is provided with two propellers having different rotation directions from each other. The rotation of one of the propellers is transmitted to the rotation shaft via the clutch, and the rotation of the rotation shaft is controlled. Since the rotation is transmitted to the wheels of the traveling vehicle via the gear mechanism, the driving force of the propeller on the wheels of the traveling vehicle is strong, and the traveling vehicle can travel by overcoming the flow velocity of the fluid in the pipe. Easy. 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 composed of a vehicle body 1a having a cylindrical cross section, and a first propeller 2 and a second propeller 3 which are rotated by the flow of fluid in the pipe A are attached to both ends of the vehicle body 1a. First
The propeller 2 and the second propeller 3 are formed in shapes that rotate in mutually opposite directions. Thus, for example, the first propeller 2 rotates clockwise and the second propeller 3 rotates counterclockwise due to the fluid flow in the pipe A.

A wheel 21 that rotatably contacts an inner surface of the pipe A is rotatably mounted on a vehicle body 1a of the traveling vehicle 1 via a wheel support block 22. Wheel support block 22
Is attached to the vehicle body 1a by a spring mechanism 23, and the wheels 21 are always in contact with the inner surface of the pipe A by the spring mechanism 23.

Next, a torque transmitting mechanism for transmitting the rotation of one of the first propeller 2 and the second propeller 3 to the wheels 21 of the traveling vehicle 1 will be described. A first fixed clutch 4 is attached to an end of the shaft 2a of the first propeller 2, and a second fixed clutch 5 is attached to an end of the shaft 3a of the second propeller 3.

Between the shaft 2a of the first propeller 2 and the shaft 3a of the second propeller 3, a tubular rotary shaft 6 is provided along the center axis of the traveling vehicle 1, and both ends of the rotary shaft 6 , Rotating shaft 6
First rotating with the rotation shaft 6 and being able to move horizontally along the rotation axis 6.
A moving clutch 7 and a second moving clutch 8 are provided. One of the first moving clutch 7 and the second moving clutch 8 is engaged with one of the first fixed clutch 4 and the second fixed clutch 5.

The shaft 2a of the first propeller 2 and the shaft 3a of the second propeller 3 are formed with through holes 9 and 10 coaxial with the tubular rotary shaft 6 along their central axes. A first push rod 11 is inserted into the through hole 9, and a second push rod 12 is inserted into the through hole 10. A center push rod 13 whose both ends are in contact with the respective ends of the first push rod 11 and the second push rod 12 is inserted into the tubular rotary shaft 6. The first push rod 11, the second push rod 12, and the center push rod 13 may be one rod. Reference numeral 24 denotes a speed reducer for reducing the rotation of the first propeller 2 and the second propeller 3.

Slots 14, 15 are formed at both ends of the tubular rotary shaft 6, and two pins 16 fixed to the center push rod 13 at positions corresponding to the slots 14, 15 are fitted with the slots 14, 15. Through the first moving clutch 7 and the second moving clutch 7 on the tubular rotary shaft 6.
It is connected to the moving clutch 8.

A spiral gear 17 is fixed at the center of the tubular rotary shaft 6 so as to surround the rotary shaft 6.
A first gear 18 meshes with 17. The first gear 18 meshes with a second gear 19, and the second gear 19 meshes with a third gear 20 coaxial with a wheel 21 mounted on a wheel support block 22 of the vehicle body 1a.

The second push rod 12 is pressed by a switching rod operating mechanism (not shown), and the first moving clutch 7 on the tubular rotary shaft 6 is provided on the shaft 2a of the first propeller 2 via the center push rod 13. The first fixed clutch 4 is engaged. As a result, the rotation of the first propeller 2 becomes
The power is transmitted to the rotating shaft 6 via the first fixed clutch 4 and the first moving clutch 7, and the rotating shaft 6 rotates clockwise around the axis as indicated by the solid arrow.

The rotation of the rotating shaft 6 is controlled by a spiral gear 17, a first gear 18, a second gear 19, and a third gear 19 provided on the rotating shaft 6.
The power is transmitted to the wheels 21 via the gear 20 to rotate the wheels 21 forward, so that the traveling vehicle 1 moves forward in the pipe A.

The first push rod 11 is pressed by a switching rod operating mechanism (not shown), and the second moving clutch 8 on the tubular rotary shaft 6 is provided on the shaft 3 a of the second propeller 3 via the center push rod 13. The second fixed clutch 5 is engaged. As a result, the rotation of the second propeller 3
The rotation is transmitted to the rotating shaft 6 via the second fixed clutch 5 and the second moving clutch 8, and the rotating shaft 6 rotates counterclockwise around its axis as indicated by a dotted arrow.

As a result, the rotation of the rotating shaft 6 is controlled by the spiral gear 17, the first gear 18, and the second gear 19 provided on the rotating shaft 6.
The wheel 21 rotates in the reverse direction by being transmitted to the wheels 21 via the third gear 20 and the traveling vehicle 1 moves backward in the pipe A.

A first push rod 11 or a second push rod 12 by a switching rod operating mechanism (not shown)
1, the center push rod 13 is moved to the intermediate position where the first moving clutch 7 and the second moving clutch 8 are not engaged with any of the first fixed clutch 4 and the second fixed clutch 5, as shown in FIG. Part. As a result, neither the rotation of the first propeller 2 nor the rotation of the second propeller 3 is transmitted to the wheels 21, and the traveling vehicle 1 stops.

In this way, the traveling vehicle 1 moves forward and backward in the pipe A along its axis, and the rotating first propeller 2 or the second propeller 3 increases the flow velocity of the fluid in the pipe A on the inner surface of the pipe. Can be 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 21 are mounted at a predetermined angle with respect to the axis of the pipe A, and the pipe A is attached to the vehicle body 1a.
May be attached via a support arm to a brush which comes into contact with the inner surface of the roller. With this configuration, the traveling vehicle 1 travels in the pipe A while rotating about the axis thereof. Therefore, the vehicle body 1a
The brush attached to the tube A always moves inside the tube A while spirally contacting the inner surface of the tube A, and the inner surface of the tube A is rubbed in the circumferential direction and the length direction by the brush.
Adhesion of foreign substances such as marine organisms to the inner surface of the pipe A can be accurately prevented in the circumferential direction and the axial direction of the pipe A and also in the curved portion and the deformed portion of the pipe A. Prior art 2
As compared with the case where the brush is mounted on the propeller, the abrasion of the brush is less and the rotational force of the propeller is not reduced by the brush.

[0027]

As described above, according to the present invention,
The traveling vehicle is provided with two propellers having different rotation directions from each other. The rotation of either one of the propellers is transmitted to a rotating shaft via a clutch, and the rotation of the rotating shaft is transmitted to the traveling vehicle via a gear mechanism. Since the power is transmitted to the wheels, the driving force of the propeller on the wheels of the traveling vehicle is strong, and the traveling vehicle can be driven by overcoming the flow velocity of the fluid in the pipe. Accordingly, many industrially useful fluids can be provided such that the flow rate of the fluid in the pipe on the inner surface of the pipe can be made faster, or the brush attached to the traveling vehicle can accurately prevent foreign matter from adhering to the inner surface of the pipe. The effect is brought.

[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 traveling platform 1a vehicle body, 2 first propeller, 2a shaft, 3 second propeller, 3a shaft, 4 first fixed clutch, 5 second fixed clutch, 6 rotating shaft, 7 first moving clutch, 8 second Moving clutch, 9 through hole, 10 through hole, 11 first push rod, 12 second push rod, 13 center push rod, 14 long hole, 15 long hole, 16 pin, 17 spiral gear, 18 first gear, 19th 2 gears, 20 3rd gear, 21 wheels, 22 wheel support block, 23 spring mechanism, 24 reducer, 31 trolley, 32 wheels, 33 shaft, 34 propeller, 35 worm gear, 36 gears, 37 pulley, 38 pulley, 39 Belt, 40 brushes.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoaki Sato 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Koji Ueda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Inside the Kokan Co., Ltd. (72) Inventor Yuzo Tanaka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yukihiko Okamoto 1-1-2 Marunouchi, Chiyoda-ku, Tokyo, Japan (72) Inventor Taketoshi Yoshida 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References 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) JP-A-62-24989 (JP, U) 23236 (JP, B2) JP 6-69201 (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 rotating direction attached to left and right ends of the traveling vehicle, the rotating direction being caused by a flow of fluid in the pipe. And a rotational force transmission mechanism provided on the traveling vehicle for transmitting the rotation of any one of the two propellers to the wheels of the traveling vehicle. A transmission mechanism is provided between a shaft end of each of the two propellers and a rotation shaft provided along a center axis of the traveling bogie, and a fixed shaft attached to an end of each shaft of the two propellers. A clutch, which is attached to both ends of the rotating shaft so as to be rotatable with the rotating shaft and horizontally movable along the rotating shaft, and is engageable with a fixed clutch of the propeller shaft; By engaging either one of the fixed clutch Ji by horizontal movement, and a clutch mechanism for transmitting the rotation of one any of the two propellers to the rotating shaft,
A device for preventing foreign matter from adhering to an inner surface of a pipe, comprising a gear mechanism for transmitting rotation of the rotation shaft to the wheel. 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.