JPS5916715Y2 - Pipe surface cleaning device - Google Patents

Description

[Detailed description of the invention] This invention is mainly applicable to various standing pipes such as heating pipes for steam catalytic reforming installed upright inside the furnace, as well as pipes installed in underground conduits, etc. for gas, water and sewage. This invention relates to a device for cleaning the surfaces of various types of fixed pipes, such as various types of horizontally installed pipes.

For example, when testing the heating pipe using a flaw detection device consisting of a transmitting probe that projects ultrasonic waves onto the test object and a receiving probe that receives the ultrasonic waves that have passed through the test object, generally , water is filled between the probe and the pipe surface to increase ultrasonic transmission, but due to scales such as oxides adhering to the pipe surface, air bubbles appear on the pipe surface in the water-filled part. This has the disadvantage that it becomes impossible to fill the device with water sufficiently, leading to a decrease in ultrasonic transmittance and, in turn, a decrease in detection accuracy.

Another drawback is that, for example, when painting the surface of a pipe, uneven coating occurs due to scales such as oxides and dust.

However, the various types of pipes mentioned above are often installed in locations that are extremely difficult to maintain, such as in high places or in narrow culverts, so it would be extremely difficult to maintain them manually. It was labor intensive and dangerous.

In view of the above-mentioned circumstances, the present invention allows automatic surface treatment to be performed safely, quickly and easily on vertical pipes located at high locations or horizontally installed pipes in narrow culverts, etc., without the need to remove the pipes. The purpose is to provide a device that can

Hereinafter, first, embodiments of the present invention will be described based on the drawings.

A machine body 2 is attached in a hugging manner to one standing pipe 1 itself to be cleaned, and can move freely in the axial direction of the pipe 1 by using the self-attached part of the pipe 1 as a trajectory for movement. ,
A scale removing device 3 covering almost the entire circumference of the outer peripheral surface of the pipe 1 is removably connected to form a pipe surface cleaning device.

As shown in FIGS. 1 and 2, the self-propelled aircraft 2 includes a box-shaped frame 4 housing an electric motor M, and a guide roller 5 having a small diameter at the center in the axial direction.
5 and a small-diameter roller 6, an endless belt 8 is wound around these rollers, and cylinders are formed on both sides of the frame 4 at intervals above and below. In addition to attaching the body 9, a shaft 11 having a roller 10 at its bent end is provided so as to be able to slide and rotate freely relative to the cylindrical body 9, and the roller 10 is drawn toward the frame 4 side. A locking piece 13 having a square cross section is provided between the upper and lower cylindrical bodies 9, and the engagement from the locking piece 13 can be released against the biasing force of the spring 12. the lever 14 along the bending line 1
1, and a roller 10 around the cylindrical body 9.
It can be freely attached to and detached from the pipe 1 by rotating the motor M, and by using the remote control device 15 for the motor M, the pipe 1 itself can be used as a track (rail) to remotely run and stop. It is designed so that it can be operated.

As shown in FIG. 1, the scale removing device 3 is constructed by connecting a curved member 16.16 having a U-shaped cross section with a hinge at one end, and a connecting tool 17 at the other end.
An annular holder 1 that is provided with a ring and holds the pipe 1.
8, and each of the U-shaped curved members 16 and 16 is made of an annular elastic body such as a polyurethane foam that elastically deforms when the pipe is encased and comes into contact with the outer peripheral surface of the pipe to exert a pressing action. At the same time as attaching the scale remover 19, the connection retainer 2 to the hanging connector 20 of the self-propelled aircraft 2 is attached.
1 is provided so that the oxidized scale on the pipe surface can be peeled off and cleaned as the self-propelled aircraft 2 is moved by remote control.

Incidentally, the scale removing tool 19 may be replaced with a wire brush or the like directed toward the center of the pipe, or the removing tool 19 may be driven and rotated around the axis of the pipe with respect to the self-propelled body 2. 3 can be modified in various ways both structurally and in composition.

Furthermore, when cleaning the pipe surface with the scale remover 19, it is also possible to supply the remover 19 or the pipe surface with an abrasive liquid containing fine powder or with an appropriate viscosity, or with a cleaning agent such as a weak acid. It is also possible to supply water and then perform a cleaning process by sprinkling water.

As shown in FIG. 3, a flaw detection device 22 is connected to the self-propelled body 2 in place of the scale removal device 3, and flaw detection of the pipe 1 is performed by remote control while also using the self-propelled body 2. This is so that you can do this.

To configure the flaw detection device 22, as shown in FIGS. 3 and 4, two sets of holders 23 and 23 each having one end connected with a pin and the other end provided with a connector are attached to one of the holders 23 and 23. The self-propelled aircraft 2 is provided with a connecting engagement part 24 to the hanging connector 20 and connected by rods 25, 25, and a curved member 26 is provided over the rods 25, 25 so that the position can be changed and fixed.
．． A transmitting probe 27 for projecting ultrasonic waves onto the pipe 1 and a receiving probe 2 for receiving the ultrasonic waves transmitted through the pipe 1 are installed on each of the curved members 26 and 26.
8 are attached so that their positions can be changed and fixed in the circumferential direction, and both probes 27 and 28 are provided with a concavely curved block 29 whose end follows the outer circumferential surface of the pipe, and a water supply communicating with the inside of the block. By connecting the pipes 30 and 30, water is constantly filled and supplied between the pipe 1 and both probes 27 and 28, and while leaking water is collected into the water receiver 31, the receiving probe is transferred from the transmitting probe 27 to the receiving probe. Ultrasonic waves are projected across the probe 28, and flaw detection is performed based on changes in the attenuation of the transmitted ultrasonic waves received by the receiving probe 28.

That is, as shown in FIG. 4, when the transmitting probe 27 projects an ultrasonic wave A onto the pipe 1 at a projection angle θ1, the ultrasonic wave A is bent at an angle θ2 at the projection aa,
It passes through the wall thickness of the pipe 1 at a depth l in the tangential direction, is refracted at a refraction angle θ2 at the transmission point, and is delivered to the reception probe 28. If there is a crack indicated by the property X, the reception The probe 28 detects the attenuated transmitted ultrasonic waves, thereby detecting the presence of cracks X at the target location. Prior to this flaw detection, the pipe surface is cleaned using the scale removing device 3. By placing the tube in place, it is possible to eliminate the generation of bubbles on the pipe surface of the water-filled portion due to the presence of scale, and it is possible to perform flaw detection work with high accuracy.

Note that the scale removing device 3 can be used in various ways, such as being used for surface treatment when painting the surface of a pipe, and can also be used for horizontally installed pipes.

In summary, the pipe surface cleaning device according to the present invention is attached to the pipe itself, which is the object of cleaning, in a foaming manner, and is self-propelled in the axial direction using the pipe itself as a moving track. A flexible body is provided with a scale removing device 3 equipped with a scale removing tool that cuts from an annular elastic body surrounding the outer peripheral surface of the pipe.

The functions and effects exhibited by the above characteristic configuration are as follows.

(a) Since the scale removal device is moved by a self-propelled machine along the pipe to be cleaned, even if the pipe is a horizontal pipe located in a narrow space such as a culvert or a high Even if a single pipe is installed over multiple locations, the scale removal can be carried out automatically, quickly, easily, efficiently and safely without the need to remove the pipe. Since a ring-shaped elastic body is used as the scale remover installed in the pipe, it can basically ensure that the entire circumference of the pipe is treated evenly without the need for cleaning with water or other chemical solutions.
Moreover, it can be carried out without the risk of damaging the surface of the pipe, and it is also possible to remove minute scales reliably. (1) Moreover, the scale removal device can be moved along the pipe itself to be cleaned. A self-propelled machine for cleaning is attached to the pipe to be cleaned in a foam-type manner, and
Since the pipe itself to be cleaned is configured to be able to move freely in the axial direction by using it as a moving track, there is no need to provide a special track (rail) for moving the self-propelled body. This made it extremely advantageous both economically and in terms of space.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe surface cleaning device according to the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a vertical side view of a self-propelled aircraft, and Fig. 3 is an overall view of the self-propelled aircraft equipped with a flaw detection device. It is a perspective view, and FIG. 4 is an explanatory diagram of flaw detection. 1...Pipe, 2...Self-propelled aircraft, 3.
...Scale removal device, 19...Scale removal tool, 23...Flaw detection device, 27...
- Ultrasonic transmitting probe, 28... Ultrasonic receiving probe.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ A device that is attached to the pipe 1 itself to be cleaned in a hugging manner, and that can move freely in the axial direction of the pipe 1 itself by using the pipe 1 itself as a track for movement. A pipe surface cleaning device characterized in that a body 2 is provided with a scale removing device 3 equipped with a scale removing tool 19 made of an annular elastic body surrounding the outer peripheral surface of the pipe 1. (2) The scale removing device 3 is detachably attached to the self-propelled aircraft 2, and when the scale removing device 3 is removed, a transmitting probe 27 that projects ultrasonic waves onto the pipe 1 and a transmission probe 27 that transmits ultrasonic waves through the pipe are provided. Utility model registration claim No.
The pipe surface cleaning device described in Section 1.