JPH09150122A - Pipe cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to develop nozzle bodies and to inject high- pressure fluid from near the inside wall surface of a pipe at the time of shell removal work by providing the device with the nozzle bodies and guide bodies which are developed or folded by the force of the high-pressure fluid and springs and wheels in contact with the inside wall of the pipe. SOLUTION: When the high-pressure fluid is introduced into a cylinder via the hose 9-1, pistons 34 extrude output shafts 32 by overcoming the energizing force of the springs 33 and turn rods 31 to bring, the wheels 30 of the guide bodies 8 into contact with the inside wall of the pipe 2. The nozzle bodies 7 are similarly turned as well. When the shell removal of the inside wall of the pipe 2 is needed, the nozzle bodies 7 and the guide bodies 8 are placed along the main body 6 and the pipe cleaning device is passed into the flowing water from an opening while a cable and the high-pressure hose are held attached to the device. When the device descends down to the desired position, the high-pressure fluid is supplied to develop the nozzle bodies 7 and the guide bodies 8, thus bringing the wheels 30 into contact with the inside wall of the pipe 30. The high-pressure fluid is spouted from the nozzles 24 and is blown to the inside wall of the pipe 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 device for efficiently removing shellfish or the like attached to the inner wall of a pipe.

[0002]

2. Description of the Related Art In power plants, oil plants, steelworks, etc.,
Since seawater is used as cooling water, it will be equipped with an intake pipe for seawater and a water discharge pipe after cooling. Egg shells adhere to the inner wall surface of the pipe for seawater, and this becomes a growth shellfish,
Egg shells attach again to this growing shellfish to form a growing shellfish. Such a layer of growing shellfish is formed on the inner wall of the tube, but eventually the lower shellfish suffocates and the shellfish falls under the weight. The growing shellfish and the falling shellfish reduce the flow path area of the pipe, increase the flow velocity resistance in the pipe, and cause a large decrease in power generation output and an accident such as power generation stoppage.

For this reason, shellfish removal work is carried out. One example is
There are chlorine injection into the pipe, utilization of a diver, and introduction of a robot. The addition of chlorine is not preferable because it kills not only shellfish but other organisms. When a diver is used, water intake or water discharge is interrupted, that is, the power plant is stopped and shellfish removal work is performed, resulting in a decrease in power generation efficiency. In addition, there are always dangers to the diver. In the robot work, if the robot itself is expensive and the robot malfunctions in the pipe, water intake and water discharge must be interrupted.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, allows free running inside the pipe, and during shelling work, the nozzle body is expanded and high pressure is applied from near the inner wall surface of the pipe. It is an object to be solved to provide a device capable of ejecting a fluid.

[0005]

In order to solve the above-mentioned problems, the present invention basically employs means for rotating a nozzle for ejecting a high-pressure fluid along an inner wall surface of a pipe.

Specifically, the present invention has a main body whose central portion is rotatable, a nozzle body which is mounted on the central portion and which is in a stretched or folded state by the force of a high pressure fluid and a spring, and a main body. Mounted on the non-rotating part of the nozzle and placed in the expanded or folded state by the force of the high-pressure fluid and the spring, the nozzle disposed in the nozzle body and spraying the high-pressure fluid on the inner wall of the pipe, and the guide body. Further, there is provided a pipe cleaning device having a wheel in contact with the inner wall of the pipe.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION At the start of shelling work, a guide body and a nozzle body are folded into a main body and lowered into running water using a cable. When the device moves to a predetermined position, the high-pressure fluid is sent to the device through the hose to spread the nozzle body and the guide body. The nozzle ejects high-pressure fluid from near the inner wall of the pipe to the inner wall surface of the pipe to remove shells. The propeller (or screw) of the body creates the rotational energy for the nozzle. While the body is being pulled back by the cable, high-pressure fluid from the rotating nozzle removes the entire inner wall surface of the pipe. If the supply of the high-pressure fluid is stopped when the shelling work is completed, the nozzle body and the guide body are folded in the main body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows both a state in which a pipe cleaning device 1 is fed to the downstream side of a pipe 2 and a state of shellfish removal work. The pipe cleaning device 1 includes a central cylindrical main body 6, a nozzle body 7 extending laterally outward from the main body 6, and a cylindrical main body 6 positioned behind the nozzle body 7 at substantially the center of the pipe 2. And a leg-shaped guide body 8. While the pipe cleaning device 1 is being transferred to the downstream side of the pipe 2, the nozzle body 7 and the guide body 8 are arranged along the main body 6,
Reduce the resistance of water. Connected to equipment that requires cooling in power plants, oil plants, steelworks, etc.,
In the opening 3 to the outside of the pipe 2 for sending seawater as cooling water,
We arrange winch 4, and cable 5 from this winch 4
Is connected to the front part of the main body 6 of the pipe cleaning device 1, and the cable 5
The position of the tube cleaning device 1 in the tube 2 is determined by the winding amount of the winch 4. Together with the cable 5, a high-pressure hose 9 for delivering high-pressure fluid is connected to the tube cleaning device 1.

As shown in FIG. 3, the main body 6 has a non-rotating head portion 10, a rotating central portion 11, and a non-rotating rear portion 12.
And The head portion 10 has a speed reducer 14 in which gears are combined in a sealed space 13, the input shaft of which has a front wall 1.
5 and extends to the front open portion to support the propeller 16. The output shaft of the speed reducer 14 penetrates the rear wall 17 and is fixed to the front wall 18 of the central portion 11. The rear portion 12 has a central space and is supported by the central portion 11 via a bearing. When the main body 6 is pulled back while the cable 5 is wound around the winch 4 in the direction opposite to the flowing water in the pipe 2, the screw 16 is rotated by the flowing water, and the rotating torque is transmitted to the central portion 11 to the speed reducer 1.
Communicate via 4. Thus, the central portion 11 rotates with respect to the head portion 10 and the rear portion 12. As the drive source of the turning portion, a waterproof electric motor, an air motor, or a motor using high-pressure water may be used in addition to the propeller 16. An arch-shaped hook portion 19 is integrally provided on the head portion 10. The cable 5 is locked to the head part 10, and
The high pressure hose 9 is guided into the space 13 using the head portion 10 as a guide.

As shown in FIG. 3, the high-pressure hose 9 extends rearward along the outer surface of the hook portion 19, penetrates the outer peripheral wall of the head portion 10, passes through the hollow output shaft of the speed reducer 14, and passes through the center. Enter the section 11. A rotary joint 20 is arranged in the central portion 11. As shown in FIG. 4, the high pressure hose 9 is connected to the inlet of the non-rotating side joint 21 of the rotary joint 20, and another high pressure hose 9-1 is connected to the outlet thereof.
This hose 9-1 is extended to the rear portion 12, and its tip is extended from the rear portion 12 to the outside. A high-pressure branch hose 9-2 is connected to the outlet of the rotary 22 which is rotatable with respect to the joint 21, and the tip of this is extended from the central portion 11 to the outside. The high pressure branch hose 9-2 rotates in the same manner as the central portion 11. A branch hose 9-3 extends from another high pressure hose 9-1.

The body 6 is made of a lightweight material such as FRP and made of a strong material to ensure buoyancy in running water and to have excellent durability.

Referring to FIG. Two or more nozzle bodies 7 are arranged on the outer peripheral surface of the central portion 11 of the main body 6 at equal intervals.
Parallelogram link 23, one end of each of the pair of long sides is central portion 11
The high pressure branch hose 9-2 along one long side.
And the high-pressure branch hose 9-2 is connected to the nozzle 24 at the tip of the other long side. Thus, the high-pressure fluid that has entered the high-pressure branch hose 9-2 from the high-pressure hose 9 through the rotary joint 20 is discharged through the nozzle 24.

One long side of the parallelogram link 23 is pivotally supported by an output shaft 27 integral with a piston 26 via an arm 25. The piston 26 is slidably accommodated in the cylinder and receives the biasing force of a spring 28 in the cylinder. A chamber different from the spring chamber in the cylinder defined by the piston 26 is connected to the branch hose 9-3 to enable introduction of high-pressure fluid. When high-pressure fluid enters this chamber, the piston 26 resists the urging force of the spring 28 and the output shaft 2
Move to put 7 in the cylinder. Therefore, the arm 25 rotates one long side of the parallelogram link 23 in a counterclockwise direction as seen in FIG. 5 to move the nozzle 24 to a position to approach the inner wall of the tube 2, The discharged high-pressure fluid is strongly hit against the inner wall of the tube 2 to remove the shellfish attached to the inner wall. The cylinder is supported by a pin 29 on the outer peripheral surface of the central portion 11. Preferably, two nozzle bodies 7 and two spreading cylinders are used (only one is shown in FIG. 2 and the others are omitted), but three or four may be used.

The guide body 8 is composed of a rod 31 having one end pivotally supported by the rear portion 12 and having a wheel 30 at its tip, and a spreading cylinder in which one end of an output shaft 32 is connected to the rod 31. The spreading cylinder is pivotally supported at the rear. The inside of the cylinder of the expansion cylinder is partitioned by a piston 34, high-pressure fluid is introduced into one chamber via a high-pressure hose 9-1, and the pressure of this high-pressure fluid is applied to the spring 3 via the piston 34.
Face 3 In this example, when high-pressure fluid is introduced into the cylinder through the hose 9-1, the piston 34 moves in the direction of pushing the output shaft 32 against the biasing force of the spring 33, and the rod 31 As viewed at 5, it rotates counterclockwise to bring the wheel 30 into contact with the inner wall of the tube 2. The guide body 8 of the combination of the expansion cylinder and the rod 31 is attached to the rear part 1.
Arrange 3 or 4 at equal intervals in 2. In FIG. 5, one guide body 8 is shown in order to simplify the drawing.

The hemispherical portion 35 at the end of the rear portion 12 reduces the resistance of the pipe cleaning device 1 during the downward movement of the pipe 2 to the downstream side.

When it is necessary to remove shells from the inner wall of the pipe 2, a pipe cleaning device 1 having the nozzle body 7 and the guide body 8 along the main body 6 and shown in the right side of FIG. While still attached, pour into running water through opening 3. The device 1 to the scheduled position
When it drops, high-pressure fluid is supplied through the hose 9,
Each spreading cylinder is operated to bring the nozzle body 7 and the guide body 8 to the left side of FIG. 1, that is, the state of FIG. The high-pressure fluid is ejected from the nozzle 24, and the high-pressure fluid is sprayed on the inner wall of the pipe 2. The wheel 30 contacts the inner wall of the tube 2.

The device 1 is connected to the cable 5 against the flow of running water.
Is wound around the winch 4 and pulled back. At this time, since the propeller 16 rotates, the rotation of the propeller 16 causes the central portion 11 to rotate, and the fountain from the nozzle 24 is sprayed over the entire inner peripheral surface of the pipe 2 to remove the shell. When the high-pressure fluid is withdrawn after the shelling work is completed, the nozzle bodies 7 and the guide bodies 8 are housed around the main body 6 by the action of the springs 28 and 33.

[0018]

EFFECTS OF THE INVENTION Since the apparatus of the present invention has a shape in which the nozzle body and the set body are folded around the main body by the force of the spring when the high-pressure fluid is discharged, the movement resistance in running water is small,
Also, it becomes easy to carry. This feature makes it possible to advance the device by folding the nozzle body and the guide body by releasing the high pressure when the nozzle gets caught by something during shellfish removal and cannot advance. . If the cable is cut due to an accident, the hose should also be cut, and the running water in the shape shown on the right side of Fig. 1 should be run and collected at the open channel or outlet. Therefore, it is not necessary to stop water intake or water discharge. The adoption of the parallelogram link keeps the preferable inclination of the nozzle with respect to the inner wall of the tube. This does not remove the paint on the inner wall of the pipe. Moreover, the number of shellfish removing works may be two to three, and the man-hours can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a pipe cleaning device in an inner pipe water passage.

FIG. 2 is a perspective view of a pipe cleaning device.

FIG. 3 is a sectional view showing a main body and a high pressure hose.

FIG. 4 is a cross-sectional view of a rotary joint.

FIG. 5 is a perspective view showing a main body, a nozzle body, and a guide body.

[Explanation of symbols]

 1 pipe cleaning device 2 pipe 5 cable 6 main body 7 nozzle body 8 guide body 9 high pressure hose 10 head portion 11 central portion 12 rear portion 14 reduction gear 16 propeller 20 rotary joint 23 parallelogram link 24 nozzle 26, 34 piston 27, 32 output Axis 28, 33 Spring 30 Wheel

Continued Front Page (72) Inventor Chiyoda Chiyoda, Ono-cho, Tsurumi-ku, Kanagawa 61-1 Pec Co., Ltd. (72) Inventor, Masanobu Higuchi 61-1 Ono-cho, Tsurumi-ku, Yokohama, Kanagawa Peck, Inc.

Claims (2)

[Claims] 1. A main body whose central portion is rotatable, a nozzle body which is mounted on the central portion and which is in a stretched or folded state by the force of a high-pressure fluid and a spring, and a non-rotating portion of the main body. And a guide body that is expanded or folded by the force of the high-pressure fluid and a spring, a nozzle that is arranged in the nozzle body and blows the high-pressure fluid to the inner wall of the pipe, and a wheel that is arranged in the guide body and is in contact with the inner wall of the pipe. Pipe cleaning device having a. 2. The pipe cleaning apparatus according to claim 1, wherein the main body has a propeller that is rotated by running water, and the rotational torque of the propeller is transmitted to the central portion of the main body.