JPH0623334A - Device to prevent foreign matter from sticking to tubular inner surface - Google Patents

Abstract

(57) [Abstract] [Purpose] The traveling carriage can be easily traveled by overcoming the flow velocity of the fluid by using the rotational force of the propeller that rotates by the fluid in the pipe as a power source. (EN) Provided is a device capable of appropriately preventing the adhesion of foreign matter to the inner surface of the pipe by using a high flow velocity or by a brush attached to a traveling carriage. [Structure] A propeller 3 which is rotated by a flow of a fluid in a pipe A is attached to a central portion of a traveling vehicle 1 having wheels 19a to 19b traveling in the pipe A, and the propeller 3 is rotated by gears 7a to 7a. 7d, 8a-8d, reducers 11a-11d and gears
A clutch that idles around the rotary shaft 6 via 10a to 10d.
The rotating shaft 6 is rotated by the moving clutches 15 and 16 which are transmitted to the clutches 12 and 13 and which can be engaged with the clutches 12 and 13 and which rotate together with the rotating shaft 6. To 19b to move the traveling carriage 1.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art For example, marine organisms such as barnacles and mussels adhere to the inner surfaces of intake pipes and the like of thermal power stations installed on the coast. If such marine organisms adhere to the inner surface of the intake pipe, etc., it becomes difficult to take in water, which causes a serious obstacle to the operation of the thermal power plant.

Therefore, it has been conventionally practiced to prevent marine organisms from adhering to the inner surface of the pipe by injecting chlorine or the like into the pipe or by applying antifouling paint to the inner surface of the pipe. Was there. However, such a method has a bad influence on the environment and has a problem in terms of maintenance.

There is a demand for the development of a device that solves the above-mentioned problems and prevents biological adhesion to the inner surface of the pipe without adversely affecting the environment. For example, the following device is known. As shown in FIG. 2 disclosed in Japanese Patent Laid-Open No. 62-26158,
A moving device in a fluid consisting of: A traveling carriage 31 having a plurality of wheels 32 that moves in the pipe A in the axial direction thereof, and a propeller that is rotatably supported by the traveling carriage 31 via a shaft 33 and that is rotated by a fluid flow in the pipe A. 34, and a worm gear 35 is attached to the tip of the rotary shaft of the propeller 34, a gear 36 is meshed with the worm gear 35, and a pulley 37 is coaxially attached to the gear 36. A belt 39 is wound around a pulley 37 and a pulley 38 attached to a wheel 32 (hereinafter referred to as prior art 1).

According to the device 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 the wheel 32.
The rotation of the traveling carriage 31 causes the traveling carriage 31 to travel along the axis of the pipe A without requiring external energy. As a result, the propeller 34 of the traveling carriage 31 traveling in the pipe A increases the flow velocity of the fluid in the pipe A on the inner surface of the pipe, so that the adhesion of marine organisms to the inner surface of the pipe is prevented.

FIG. 3 disclosed in Japanese Patent Publication No. 3-23236
The biofouling prevention device on the inner surface of the pipe as shown in the following. A traveling carriage 31 having a plurality of wheels 32 that moves in the pipe A in the axial direction thereof, a propeller 34 attached to the traveling carriage 31 and rotated by a fluid flow in the pipe A, and a propeller.
A brush 40 for rubbing the inner surface of the pipe A is attached to the tip of 34, and a worm gear 35 is attached to the tip of the rotating shaft of the propeller 34.
A gear 36 is meshed with the gear 36, and a pulley 37 is coaxially attached to the gear 36, and a belt 39 is wound between the pulley 37 and a pulley 38 mounted on a wheel 32 (hereinafter, referred to as a belt 39). 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 in the pipe A is applied to the wheel 32 via the worm gear 35, the gear 36 and the belt 39, as in the prior art 1. Due to the rotation of the wheels 32 transmitted, the traveling carriage 31 travels in the pipe A along its axis without the need for external energy. As a result, the inner surface of the pipe A is rubbed by the brush 40 attached to the tip of the rotating propeller 34, and as a result, marine organisms are prevented from adhering to the inner surface of the pipe.

[0008]

The above-mentioned prior arts 1 and 2 have the following problems. That is, both
Rotation of the propeller 34 by the flow of fluid in the pipe A
The mechanism for transmitting to the wheels 32 of 31 is a worm gear 35,
There are only the gear 36 and the belt 39 wound around the pulley 37 and the pulley 38. Therefore, by the propeller 34,
The driving force for the wheels 32 of the traveling carriage 31 is weak, and it is difficult to drive the traveling carriage 31 in actual operation by overcoming the flow velocity of the fluid in the pipe A. Therefore, the propeller 34 of the traveling carriage 31 increases 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.
The inner surface of the pipe A is rubbed by these, and by these, adhesion of marine organisms to the inner surface of the pipe cannot be prevented.

Prior art 2 has the following problems. That is, at the curved portion or the deformed portion of the pipe A, the brush 40 attached to the tip of the propeller 34 does not come into contact with the inner surface of the pipe. Therefore, the attachment of the organism to the inner surface of the curved portion or the deformed portion of the pipe. Cannot be prevented. Further, due to the friction of the brush 40 with the inner surface of the pipe, the rotational force of the propeller 34 is reduced, and the wear of the brush 40 is large and the life thereof is short.

Therefore, an object of the present invention is to solve the above-mentioned problems and to make a traveling carriage easily driven by using the rotational force of a propeller rotated by a fluid in a pipe as a power to overcome the flow velocity of the fluid. Accordingly, it is an object of the present invention to provide a device capable of increasing the flow velocity of the fluid in the pipe on the inner surface of the pipe, or properly preventing foreign matter from adhering to the inner surface of the pipe by a brush attached to the traveling carriage.

[0011]

[0012]

In the device of the present invention, the 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 the rotary shaft provided along the central axis of the traveling vehicle. Forward and reverse rotations are transmitted via two clutches, and the rotation of the rotating shaft is transmitted to the wheels of the traveling carriage via the gear mechanism. Therefore, the driving force of the propeller against the wheels of the traveling carriage is increased. The traveling carriage can be driven strongly by overcoming the flow velocity of the fluid in the pipe. Therefore, the propeller of the traveling carriage speeds up the flow velocity of the fluid in the pipe on the inner surface of the pipe, or the brush attached to the traveling carriage rubs the inner surface of the pipe so that foreign matter such as marine organisms adheres to the inner surface of the pipe. Can be properly prevented.

[0013]

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

A through hole 2c is provided along the central axis of the core portion 2b of the vehicle body 2, and guide tubes 5 are fixed to both ends of the through hole 2c. A horizontal rotary shaft 6 is rotatably provided inside the vehicle body 2 along a central axis thereof, through a guide tube 5 and a through hole 2c of the core portion 2b, through a bearing.

At the left and right ends of the propeller boss 4, four first gears 7a to 7d are integrally formed. First gear 7a
7d are provided with second gears 8a to 8d meshing with them, and third gears 10a to 10d are attached to speed reducers 11a to 11d at the other ends of the respective shafts 9 of the second gears 8a to 8d. Is installed through.

The speed reducers 11a to 11d decelerate the rotation of the second gears 8a to 8d by meshing a plurality of gears with each other to generate a third gear.
The transmissions are transmitted to the gears 10a to 10d, and the number of gears of the speed reducers 11a and 11b on one side is one more than that of the speed reducers 11c and 11d on the other side. Therefore, the third gear 10a, which is transmitted from the second gear 8a, 8b through the speed reducer 11a, 11b on one side,
10b rotation direction and the reduction gear from the second gear 8c, 8d to the other side
The rotation directions of the third gears 10c and 10d transmitted via 11c and 11d are different from each other.

A first clutch 12 and a second clutch 13 are provided in the guide tube 5 so as to surround the guide tube 5 so as to be freely rotatable via bearings, and the third gears 10a and 10b and the first clutch 12 are provided. Chains 14 are respectively wound between the second gear 13 and the third gears 10c and 10d and the second clutch 13.

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 at both ends of the rotating shaft 6, the first clutch 12 and the second clutch. It is provided to be engageable with 13. First bevel gears 17a and 17b are attached to both ends of the rotary shaft 6.

A drive shaft 20a of one wheel 19a, 19b, which rotatably contacts the inner surface of the pipe A, is vertically provided at one end of the vehicle body 2 of the traveling carriage 1, and the other end of the vehicle body 2 is provided at the other end thereof. Is a wheel 19c on the other side that also rotatably contacts the inner surface of the pipe A,
A drive shaft 20b of 19d is provided in the vertical direction. An upward second bevel gear 18a that meshes with the first bevel gear 17a is attached to one drive shaft 20a, and a second downward bevel gear 18b that meshes with the first bevel gear 17b is attached to the other drive shaft 20b.
Is installed.

The rotation of one of the drive shafts 20a is caused by a third bevel gear 21a provided at both ends thereof and a fourth bevel gear 24a provided at an end of a horizontal axle shaft 22 meshing with the third bevel gear 21a. Is transmitted to the axle 22 by. Therefore, the wheels 19a and 19b provided at both ends of the axle 22 are rotated. Then, the rotation of the other drive shaft 20b is caused by the rotation of the third bevel gears provided at both ends thereof.
21b and a fourth bevel gear 24b provided at the end of a horizontal axle 23, which meshes with the third bevel gear 21b, is transmitted to the axle 23. 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 projects from one end of the vehicle body 2 and the other end of which projects from the other end of the vehicle body 2. A switching piece 26 whose tip engages with the grooves of the first moving clutch 15 and the second moving clutch 16 is provided at the intermediate portion of the switching rod 25.

One end of the clutch switching rod 25 is pressed by a switching rod operating mechanism (not shown), and the switching piece 26 causes the first moving clutch 15 to move to the first clutch 12.
Engage with. As a result, if the propeller 3 is, for example, rotating counterclockwise due to the water flow in the pipe A, its rotation is
Gears 7a, 7b, second gears 8a, 8b and one reduction gear 11a, 11
It is transmitted to the third gears 10a, 10b via b, and the third gears 10a, 10b
Turn 10b counterclockwise.

The rotation of the third gears 10a, 10b is transmitted to the first clutch 12 by the chain 14, and the rotary shaft 6 is transmitted through the first moving clutch 15 meshing with the first clutch 12.
Is rotated counterclockwise about its axis. At this time, the rotation direction of the third gears 10c, 10d transmitted via the reduction gears 11c, 11d on the other side having different numbers of gears is opposite, but the second clutch 13 rotated by the third gears 10c, 10d is , Around the guide tube 5 is idle.

The rotation of the rotary shaft 6 is such that the first bevel gears 17a, 17b provided at both ends thereof and the second bevel gear meshing with the first bevel gears 17a, 17b.
It is transmitted to the drive shafts 20a, 20b via 18a, 18b,
Rotate a, 20b 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.
Rotate counterclockwise. Thus, the wheels 19a, 19b, 19c, 19d provided at both ends of the axles 22, 23 rotate counterclockwise, and the traveling carriage 1
Run in pipe A.

The other end of the clutch switching rod 25 is pressed by a switching rod operating mechanism (not shown), and the switching piece 26 causes the second moving clutch 16 to move to the second clutch 13.
Engage with. As a result, the rotation of the propeller 3 will be
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 the chain 14, and the rotary shaft 6 is transmitted through the 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, 10b transmitted via the one-side speed reducer 11a, 11b is reversed, but the third gear 10a, 11b is rotated.
The first clutch 12 rotated by 10a, 10b is the guide tube 5
It will be in a state of idling around.

The rotation of the rotary shaft 6 is such that the first bevel gears 17a, 17b provided at both ends thereof and the second bevel gear meshing with the first bevel gears 17a, 17b.
It is transmitted to the drive shafts 20a, 20b via 18a, 18b,
Rotate a, 20b 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.
Rotate right. Thus, the wheels 19a, 19b, 19c, 19d provided at both ends of the axles 22, 23 rotate clockwise, and the traveling carriage 1
Travel backwards in tube A.

By adjusting the pressing of the clutch switching rod 25 by a switching rod operating mechanism (not shown), the clutch switching rod 25 is connected to the first moving clutch 15 and the second moving clutch 16 as shown in FIG. And the second clutch 13 is located at an intermediate portion that does not engage with either of them. As a result, the rotation of the propeller 3 is caused by the wheels 19a to 19a.
It is not transmitted to d and traveling carriage 1 is stopped.

In this way, the traveling carriage 1 moves forward and backward in the pipe A along its axis, and the propeller 3 rotating causes the flow velocity of the fluid in the pipe A on the pipe inner surface to be accelerated. As a result, adhesion of foreign matter such as marine organisms to the inner surface of the pipe is appropriately prevented in the circumferential direction and the length direction of the pipe A.

Although not shown, the wheels 19a to 19d are attached by inclining the wheels 19a to 19d at a predetermined angle with respect to the axis of the pipe A, and the vehicle body 2
Alternatively, a brush that comes into contact with the inner surface of the tube A may be attached via a support arm. In this way, the traveling vehicle 1 travels in the pipe A while rotating around its axis. Therefore, the brush attached to the vehicle body 2 always moves in the pipe A while spirally contacting the inner face of the pipe A, and the inner face of the pipe A is rubbed by the brush in the circumferential direction and the length direction. , Foreign matter such as marine organisms adheres to the inner surface of the pipe A.
It is possible to appropriately prevent the curved portion and the deformed portion of the pipe A over the circumferential direction and the axial direction. Also,
Compared with 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 in the center of the vehicle body of the traveling vehicle, and the rotation of this propeller can be rotated in the forward and reverse directions through two clutches provided at both ends of the rotating shaft provided along the central axis of the traveling vehicle. Since the rotation of the rotating shaft is transmitted to the wheels of the traveling carriage via the gear mechanism, the propeller propels the driving force against the wheels of the traveling carriage to overcome the flow velocity of the fluid in the pipe. , The traveling carriage can be driven. Therefore, the propeller of the traveling carriage speeds up the flow velocity of the fluid in the pipe on the inner surface of the pipe, or the brush attached to the traveling carriage rubs the inner surface of the pipe so that foreign matter such as marine organisms adheres to the inner surface of the pipe. Can be prevented appropriately, and many industrially useful effects are brought about.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the device of the present invention.

FIG. 2 is a schematic vertical sectional view of a device of Prior Art 1.

FIG. 3 is a schematic vertical sectional view of a device of Prior Art 2.

[Explanation of symbols]

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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Sato 1-2, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Koji Ueda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Taketoshi Yoshida 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Yuzo Tanaka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside the Steel Pipe Corporation (72) Inventor Yukihiko Okamoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Steel Pipe Corporation

Claims (3)

[Claims] 1. A traveling carriage having a plurality of wheels, which moves in the pipe in the axial direction thereof, and a propeller which is rotatably attached to a central portion of the traveling carriage and is rotated by a flow of fluid in the pipe. A rotational force transmission mechanism for transmitting the rotation of the propeller to the wheels of the traveling vehicle, the rotational force transmitting mechanism being provided on the traveling vehicle along the central axis of the traveling vehicle. A rotary shaft that is provided as a pair, and two clutches that are provided at both ends of the rotary shaft so as to idle around the rotary shaft, and that transmit the rotation of the propeller in the opposite directions by a gear mechanism. Two moving clutches that are engaged with the two clutches and that are provided at both ends of the rotating shaft and that rotate together with the rotating shaft and are horizontally movable along the rotating shaft, 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 forward and reverse directions 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, characterized in that 2. The brush for contacting the inner surface of the pipe to prevent foreign matters from adhering to the inner surface of the pipe is attached to the traveling carriage 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 pipe, whereby
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.