JP2010145183A - Observation device for observing inner surface of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an observation device for observing the inner surface of a pipe for simply and rapidly measuring the inner surface of a testpiece on the measuring spot and having a simple structure. <P>SOLUTION: The observation device for observing the inner surface of the pipe for observing the inner surface of the testpiece 11 includes: a fiberscope 12 having a CCD camera 13 being an imaging part, which observes the inside of the testpiece 11, at its leading end; and a pipe inner surface holding device body 21A enabling the insertion/extraction of the fiberscope 12 and having a freely bendable hollow pipe 21a. A spring band 22, which is a curved protruded body curved toward the outer peripheral side of the fiberscope 12 centering around the fiberscope to protrude, is provided to the periphery of the pipe inner surface holding device body 21A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe inner surface observation device that can observe the inside of a pipe, for example.

Conventionally, it has been required to directly observe damage to piping such as boilers.
FIG. 7 shows an example of observation inside the pipe which is the conventional specimen 11.
As shown in FIG. 7, in order to observe the inside of the specimen 11, a fiberscope 12 having an imaging means (for example, a CCD camera) 13 at the tip is used, and the fiber portion is forcibly inserted into the inner surface of the specimen. Then, the inside of the specimen 11 was dragged and the inside was observed with the fiberscope monitor 14.

  In such an observation, when observing the inner surface of the specimen with a fiber, the observation is performed by dragging the lower surface side of the imaging unit, so that there is a problem that the observation cannot be performed from the center of the inner surface of the pipe.

For this reason, for example, there is a proposal using a telescopic arm as shown in FIG.
As shown in FIG. 8, the in-pipe inspection traveling device is configured such that a traveling vehicle 2 inserted inside a piping and an inspection vehicle 8 provided with an inspection device 7 are connected by a relay unit 9, and two expansion / contractions are performed at a predetermined position. The free arm 3 is extended so that the traveling vehicle 2 and the inspection vehicle 8 are aligned with the axis of the pipe 1.

Japanese Patent Laid-Open No. 06-123402

However, since the device according to Patent Document 1 is operated by an air cylinder provided inside the traveling vehicle 2 when the telescopic arm 3 is operated, the device is large, and the traveling vehicle 2 and the inspection vehicle 8 are relayed. Since it is necessary to insert all the units 9 into the piping at once, there is a problem that handling of the test specimen at the inspection site is complicated.
Therefore, the appearance of a tube inner surface observation apparatus having a simple structure is desired, as the handling of the specimen is simple and easy to handle.

  In view of the above problems, an object of the present invention is to provide a tube inner surface observing device that can be easily and quickly measured at the measurement site of the inner surface of a specimen and has a simple structure.

  A first invention of the present invention for solving the above-described problem is a tube inner surface observation device for observing the inner surface of a specimen, and a fiberscope for observing the inside of the specimen, and the fiberscope inside. A tube inner surface holding device main body having a hollow tube that can be inserted / removed, and bends around the tube inner surface holding device main body with a fiberscope as a center toward the outer peripheral side. It exists in the pipe inner surface observation apparatus characterized by having a protrusion.

  According to a second aspect of the present invention, there is provided the tube inner surface observation apparatus according to the first aspect, wherein the curved projecting body is at least three or more spring bands that can be projected by an operating jig.

  According to a third aspect of the present invention, there is provided the tube inner surface observation device according to the first aspect, wherein the curved projecting body is at least three or more resin strings that can be projected by an operating jig.

  According to a fourth aspect of the invention, there is provided the tube inner surface observation device according to the first aspect, wherein the curved protrusion is a balloon that can be protruded by an operating jig.

  According to the present invention, it is possible to instantly center using a curved projecting body on the inner surface of a pipe, which is a test object, and it is possible to easily and quickly take a picture at the center position of the pipe.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

A tube inner surface observation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a tube inner surface observation apparatus according to the first embodiment.
As shown in FIG. 1, the tube inner surface observation apparatus according to the present embodiment is a tube inner surface observation device for observing the inner surface of the specimen 11 and is a CCD camera that is an imaging unit at the tip for observing the inside of the specimen 11. 13, and a tube inner surface holding device main body 21 </ b> A having a hollow tube 21 a that can be inserted / removed into / from the inside of the fiber scope 12. Around the main body 21A, there is a spring band 22 that is a curved projecting body that curves and projects toward the outer periphery of the fiberscope 12 as a center. The spring band 22 may be a thin steel strip or the like.

  The hollow tube 21a has a tube diameter into which the fiberscope 12 provided with the CCD camera 13 can be inserted, has flexibility, and may be made of resin, rubber, bellows-like stainless steel, or the like.

FIG. 2-1 is a side view of the tube inner surface holding device main body, and FIG. 2-2 is a front view of the tube inner surface holding device main body. FIG. 3A is a side view when the spring band of the tube inner surface holding device main body is curved, and FIG. 3-2 is a front view when the spring band of the tube inner surface holding device main body is bent. FIG. 4-1 is a side view of the tube inner surface holding device main body of the spring band operation cam portion, and FIG. 4-2 is a side view of the operation state of the spring band operation cam.
As shown in these drawings, the operating jig for operating the spring band 22 includes a slide ring 25 that is slidable in the axial direction around the main body of the operating jig, and a slide ring that presses the slide ring 25 in the axial direction. The operation cam 24 and a spring band operation wire 23 for rotating the slide ring operation cam 24 are configured.

  When the spring band 22 is projected to the outer peripheral side, the spring band operating wire 23 is operated, the slide ring operating cam 24 is rotated, and the slide ring 25 is pressed forward in the axial direction. The spring band 22 applied to the ring 26 and the slide ring 25 is curved, and the inside of the specimen 11 can be centered.

  It is preferable that the number of spring bands 22 from which the curved protrusions can be protruded by an operating jig is at least three.

  Instead of using the slide ring operating cam 24, a wire for moving the slide ring 25 forward may be hung around the fixing ring 26 to bend the spring band 22.

In order to observe the inner surface of the specimen using such a tube inner surface observation apparatus, the following operation is performed.
1) First, as shown in FIG. 1, a tube inner surface observation apparatus main body 21 </ b> A having a hollow tube 21 a is inserted from the insertion portion 14 of the specimen 11.
2) Next, at the predetermined observation position, as shown in FIGS. 3A and 4B, the spring operating wire 23 is operated, the slide ring 25 is pressed, and is supported by the fixed ring 26. The spring band 22 is bent so that the tube inner surface observation device main body 21 </ b> A is self-supporting at the center of the inner surface of the specimen 11.
3) After that, the fiberscope 12 having the CCD camera 13 as the imaging unit at the tip is inserted from the end 21b of the hollow tube 21a of the tube inner surface holding device 21A, and the imaging unit 13 is protruded from the inserted tip 21c. Observation is performed from the center position of the specimen 11.

  As a result, according to the main pipe inner surface observing device, the spring band 22 is bent toward the outside, so that the spring band 22 is instantaneously set at the center of the specimen 11 and can be easily centered. And it becomes possible to start imaging | photography easily from the center position of the to-be-tested object 11 by inserting the fiberscope 12 which has the CCD camera 13 in the front-end | tip from the hollow tube 21a.

  After the photographing is finished, the spring band 22 is loosened and advanced to a predetermined position, the spring band 22 is bent again, centered at a predetermined position in the specimen 11, and then the photographing is started. That's fine.

  At this time, the fiberscope 12 may be pulled out and moved, or may be moved as it is inserted into the hollow tube 21a.

  Here, the spring band operating wire 23 can be easily pulled by hand, or may be a brake-type handle used, for example, on a bicycle, or may be wound up and fixed during photographing. It may be.

  According to the present invention, the tube inner surface holding device 21A is inserted into the inner surface of the specimen 11 and the spring band operating wire 23 is actuated to curve the spring band 22 so that the center of the inner surface of the specimen 11 can be easily and instantly obtained. Then, by inserting the fiberscope 12 having the imaging unit from the end 21b and projecting the CCD camera 13 from the tip 21c, it is possible to easily perform imaging from the center of the specimen 11 to be tested. it can.

Further, the spring band 22 can be centered by adjusting its dimensions so as to match the diameter inside the tube.
Furthermore, by setting the size so that a large tube can be centered, it is possible to continuously center from a small tube to a large tube.

  The length of the hollow tube 21a may be determined according to the length of the fiber scope 12 (for example, 3 m, 7 m, 15 m, etc.).

  As described above, according to the present invention, the center of the specimen 11 can be instantaneously centered using the three spring bands 22 on the inner surface of the pipe, and the object to be observed from the CCD camera 13 at the center position of the pipe. It is possible to easily find the target, and it is possible to easily and quickly take a picture from the CCD camera 13 of the photographing unit at the center position of the tube. Therefore, for example, the improvement of observation accuracy inside the specimen under test such as boiler piping and the reduction of observation time can be greatly reduced.

A pipe inner surface holding device body according to a second embodiment of the present invention will be described with reference to the drawings.
5A and 5B are schematic views of the tube inner surface holding device main body according to the second embodiment. In addition, about the member same as the structural member of Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 5A, the pipe inner surface holding device main body 21B according to the present embodiment is a curved projecting body obtained by bundling a plurality of resin strings 31 provided between the slide ring 25 and the fixing ring 26. There is something. Then, as shown in FIG. 5B, by pressing the slide ring 25 forward, the resin string 31 is bent and brought into contact with the inner surface of the specimen 11 (not shown) for centering. I am doing so.

  In this embodiment, a bundle of resin strings 31 is used. Therefore, even when the inner surface of the specimen is uneven, any one of the plurality of resin strings 31 reliably contacts the inner surface. Therefore, the centering and the holding after the centering that are more stable than those of the first embodiment are ensured.

A pipe inner surface holding device body according to a third embodiment of the present invention will be described with reference to the drawings.
6A and 6B are schematic views of the tube inner surface holding device main body according to the third embodiment. In addition, about the member same as the structural member of Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 6A, the tube inner surface holding device main body 21C according to this embodiment projects a rubber tube 41 that is a bulging balloon body provided between a slide ring 25 and a fixed ring 26 in a curved manner. The body. Then, as shown in FIG. 6B, by pressing the slide ring 25 forward, the rubber tube 41 is swelled by an operating jig that supplies compressed air (not shown), and the specimen 11 (not shown) Centering is performed by contacting the inner surface.
Reference numeral 42 denotes a compressed air inlet / outlet through which compressed air is introduced and discharged.

Since the rubber tube is used in this embodiment, even when the inner surface of the specimen is uneven, any one of the outer surfaces of the tube surely contacts the inner surface. The centering more stable than 1 and the holding after the centering are ensured.
In addition, although the rubber-made balloon body was illustrated in the present Example, this invention is not limited to this, Any may be sufficient as long as it is a material which swells like a balloon.

  As described above, according to the tube inner surface observation apparatus according to the present invention, it is possible to instantly center using the curved projecting body on the inner surface of the pipe that is a specimen, and the image is taken from the photographing unit at the center position of the tube. This can be done easily and quickly.

1 is a schematic diagram of a tube inner surface observation apparatus according to Example 1. FIG. 1 is a side view of a tube inner surface observation apparatus main body according to Embodiment 1. FIG. 1 is a front view of a tube inner surface observation apparatus main body according to Example 1. FIG. It is a side view at the time of the spring band of a pipe inner surface holding | maintenance apparatus main body curving. It is a front view at the time of the spring band of a pipe inner surface holding | maintenance apparatus main body curving. It is a side view of the pipe inner surface holding device main body of the spring band operation cam part. It is a side view of the operating state of the spring band operation cam. 6 is a schematic view of a tube inner surface holding device main body according to Embodiment 2. FIG. It is the schematic when the pipe inner surface holding | maintenance apparatus main body which concerns on Example 2 bulges. 6 is a schematic view of a tube inner surface holding device body according to Embodiment 3. FIG. It is the schematic when the pipe inner surface holding | maintenance apparatus main body which concerns on Example 3 swells. It is a schematic diagram of the measurement inside the piping which concerns on a prior art. It is the schematic of the other measuring apparatus inside the piping which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Specimen 12 Fiberscope 13 CCD camera 21A, 21B, 21C Tube inner surface holding device main body 21a Hollow tube 22 Spring band 23 Spring band operation wire 24 Slide ring operation cam 25 Slide ring 26 Fixing ring

Claims (4)

A tube inner surface observation device for observing the inner surface of a specimen,
A fiberscope for observing the inside of the specimen,
The fiberscope comprises a tube inner surface holding device body having a hollow tube that can be inserted / removed inside,
An apparatus for observing a tube inner surface, comprising a curved projecting body that curves and projects toward an outer periphery of a fiber scope around a tube scope holding device main body. In claim 1,
An apparatus for observing the inner surface of a tube, wherein the curved projecting body is at least three spring bands that can be projected by an operating jig. In claim 1,
An apparatus for observing an inner surface of a tube, wherein the curved projecting body is at least three resin strings that can be projected by an operating jig. In claim 1,
An apparatus for observing an inner surface of a tube, wherein the curved projecting body is a balloon body that can be projected by an operating jig.

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